* Update lintian overrides.
# imported from the archive
--- /dev/null
+ GNU GENERAL PUBLIC LICENSE
+ Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
+
+ The licenses for most software are designed to take away your
+freedom to share and change it. By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users. This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it. (Some other Free Software Foundation software is covered by
+the GNU Lesser General Public License instead.) You can apply it to
+your programs, too.
+
+ When we speak of free software, we are referring to freedom, not
+price. Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+ To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+ For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have. You must make sure that they, too, receive or can get the
+source code. And you must show them these terms so they know their
+rights.
+
+ We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+ Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software. If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+ Finally, any free program is threatened constantly by software
+patents. We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary. To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+ The precise terms and conditions for copying, distribution and
+modification follow.
+
+ GNU GENERAL PUBLIC LICENSE
+ TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+ 0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License. The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language. (Hereinafter, translation is included without limitation in
+the term "modification".) Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope. The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+ 1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+ 2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+ a) You must cause the modified files to carry prominent notices
+ stating that you changed the files and the date of any change.
+
+ b) You must cause any work that you distribute or publish, that in
+ whole or in part contains or is derived from the Program or any
+ part thereof, to be licensed as a whole at no charge to all third
+ parties under the terms of this License.
+
+ c) If the modified program normally reads commands interactively
+ when run, you must cause it, when started running for such
+ interactive use in the most ordinary way, to print or display an
+ announcement including an appropriate copyright notice and a
+ notice that there is no warranty (or else, saying that you provide
+ a warranty) and that users may redistribute the program under
+ these conditions, and telling the user how to view a copy of this
+ License. (Exception: if the Program itself is interactive but
+ does not normally print such an announcement, your work based on
+ the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole. If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works. But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+ 3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+ a) Accompany it with the complete corresponding machine-readable
+ source code, which must be distributed under the terms of Sections
+ 1 and 2 above on a medium customarily used for software interchange; or,
+
+ b) Accompany it with a written offer, valid for at least three
+ years, to give any third party, for a charge no more than your
+ cost of physically performing source distribution, a complete
+ machine-readable copy of the corresponding source code, to be
+ distributed under the terms of Sections 1 and 2 above on a medium
+ customarily used for software interchange; or,
+
+ c) Accompany it with the information you received as to the offer
+ to distribute corresponding source code. (This alternative is
+ allowed only for noncommercial distribution and only if you
+ received the program in object code or executable form with such
+ an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it. For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
+control compilation and installation of the executable. However, as a
+special exception, the source code distributed need not include
+anything that is normally distributed (in either source or binary
+form) with the major components (compiler, kernel, and so on) of the
+operating system on which the executable runs, unless that component
+itself accompanies the executable.
+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+ 4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License. Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+ 5. You are not required to accept this License, since you have not
+signed it. However, nothing else grants you permission to modify or
+distribute the Program or its derivative works. These actions are
+prohibited by law if you do not accept this License. Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+ 6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions. You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+ 7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License. If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all. For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices. Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+ 8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded. In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+ 9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time. Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number. If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation. If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+ 10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission. For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this. Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+ NO WARRANTY
+
+ 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+ 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along
+ with this program; if not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+ Gnomovision version 69, Copyright (C) year name of author
+ Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary. Here is a sample; alter the names:
+
+ Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+ `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+ <signature of Ty Coon>, 1 April 1989
+ Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs. If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.
--- /dev/null
+Run `perl Makefile.PL` to generate a Makefile, then run `make` and
+`make install`.
+
+To configure pristine-tar for your local environment, you may specify
+the following additional parameters to Makefile.PL for the creation
+of the Makefile
+
+PERL_SHEBANG=<shell-shebang-to-launch-perl-script>
+TAR_PROGRAM=<name-or-path-to-gnu-tar>
+XDELTA_PROGRAM=<name-or-path-to-xdelta1>
+
+The PERL_SHEBANG needs only to be adapted in rare cases, as it is usually
+correctly set by MakeMaker. However, the TAR_PROGRAM should refer to the GNU
+version of Tar, which may be called, e.g., "tar" (default), "gtar", or
+"gnutar" depending on the system. The XDELTA_PROGRAM needs to refer to the
+Xdelta program in version 1.x (http://xdelta.org), which may be called, e.g.,
+"xdelta" (default) or "xdelta1". Xdelta3 won't work, as it has a different
+command line syntax.
+
+The installation destination (default: /usr/local) can be specified either
+via the ./Makefile.PL parameter:
+
+PREFIX=<installation-prefix>
+
+or
+
+INSTALL_BASE=<installation-prefix>
+
+See the manpage (or perldoc) of ExtUtils::MakeMaker for more details.
+
+
+EXAMPLE:
+
+$ perl Makefile.PL \
+ TAR_PROGRAM=gnutar \
+ XDELTA_PROGRAM=xdelta \
+ PREFIX=/usr/local
+$ make
+$ make install
--- /dev/null
+#!/usr/bin/env perl
+use warnings;
+use strict;
+use ExtUtils::MakeMaker;
+
+# read custom parameters
+my %args = map { split /\s*=\s*/ } @ARGV;
+my $PERL_SHEBANG = $args{PERL_SHEBANG} || "" ;
+my $TAR_PROGRAM = $args{TAR_PROGRAM} || "" ;
+my $XDELTA_PROGRAM = $args{XDELTA_PROGRAM} || "" ;
+
+if ($PERL_SHEBANG || $TAR_PROGRAM || $XDELTA_PROGRAM) {
+ print <<EOF;
+Info: MakeMaker may warn about the custom parameters 'PERL_SHEBANG',
+ 'TAR_PROGRAM', and 'XDELTA_PROGRAM', which are anyway correctly
+ handled for generating the Makefile.
+EOF
+}
+
+package MY;
+
+sub macro {
+ my $inherited = shift->SUPER::macro(@_);
+ my $subst = '';
+
+ $subst .= q[-e "s|^\#!.*|\#!$(PERL_SHEBANG)|g" ]
+ unless ! ${PERL_SHEBANG};
+ $subst .= q[-e "s|tar_program = \".*\";|tar_program = \"$(TAR_PROGRAM)\";|g" ]
+ unless ! ${TAR_PROGRAM};
+ $subst .= q[-e "s|xdelta_program = \".*\";|xdelta_program = \"$(XDELTA_PROGRAM)\";|g" ]
+ unless ! ${XDELTA_PROGRAM};
+
+ $inherited .= "\nPARAM_SUBST = ${subst}";
+ $inherited;
+}
+# Add a few more targets.
+sub postamble {
+q{
+all:: extra_build
+clean:: extra_clean
+install:: extra_install
+pure_install:: extra_install
+
+ifneq (,$(PARAM_SUBST))
+$(EXE_FILES): %:
+ sed $(PARAM_SUBST) $@ > $@.new
+ $(MV) $@.new $@
+ $(CHMOD) $(PERM_RWX) $@
+PHONY+=$(EXE_FILES)
+endif
+
+LIBDIR ?= $(PREFIX)/lib
+PKGLIBDIR ?= $(LIBDIR)/pristine-tar
+
+extra_build: zgz/zgz pristine-tar.spec
+ pod2man -c pristine-tar pristine-tar > pristine-tar.1
+ pod2man -c pristine-gz pristine-gz > pristine-gz.1
+ pod2man -c pristine-bz2 pristine-bz2 > pristine-bz2.1
+ pod2man -c pristine-xz pristine-xz > pristine-xz.1
+ pod2man -c zgz zgz/zgz.pod > zgz.1
+ $(MAKE) -C pit/suse-bzip2 PREFIX=$(PREFIX)
+
+ZGZ_SOURCES = zgz/zgz.c zgz/gzip/*.c zgz/old-bzip2/*.c
+zgz/zgz: $(ZGZ_SOURCES)
+ gcc -Wall -O2 -o $@ $(ZGZ_SOURCES) -lz -DPKGLIBDIR=\"$(PKGLIBDIR)\"
+
+extra_install:
+ install -d $(DESTDIR)$(PREFIX)/bin
+ install zgz/zgz $(DESTDIR)$(PREFIX)/bin
+ install -d $(DESTDIR)$(PREFIX)/share/man/man1
+ install -m 0644 *.1 $(DESTDIR)$(PREFIX)/share/man/man1
+ install -d $(DESTDIR)$(PKGLIBDIR)/suse-bzip2
+ install pit/suse-bzip2/bzip2 pit/suse-bzip2/libbz2* $(DESTDIR)$(PKGLIBDIR)/suse-bzip2
+
+extra_clean:
+ $(MAKE) clean -C pit/suse-bzip2 PREFIX=$(PREFIX)
+
+pristine-tar.spec: debian/changelog
+ sed "s/Version:.*/Version: $$($(PERLRUN) -e '$$_=<>;print m/\((.*?)\)/'<$<)/" \
+ $@ > $@.new && $(MV) $@.new $@
+PHONY+=pristine-tar.spec
+
+.PHONY: $(PHONY)
+}
+}
+
+ExtUtils::MakeMaker::WriteMakefile(
+ NAME => 'Pristine',
+ AUTHOR => 'Joey Hess <joey@kitenet.net>',
+ ABSTRACT =>
+ 'regenerate a pristine upstream tarball using only a small '.
+ 'binary delta file and a revision control checkout',
+ MAN1PODS => {},
+ MAN3PODS => {},
+ PMLIBDIRS => ["Pristine"],
+ EXE_FILES => ["pristine-tar","pristine-bz2","pristine-gz","pristine-xz"],
+ macro => {
+ PERL_SHEBANG => "${PERL_SHEBANG}",
+ TAR_PROGRAM => "${TAR_PROGRAM}",
+ XDELTA_PROGRAM => "${XDELTA_PROGRAM}"
+ },
+ clean => { FILES => 'zgz/zgz' },
+);
--- /dev/null
+#!/usr/bin/perl
+# pristine-tar utility library
+
+package Pristine::Tar;
+
+use warnings;
+use strict;
+use File::Temp;
+use Getopt::Long;
+use IPC::Open2;
+use Exporter q{import};
+
+our @EXPORT = qw(error message debug vprint doit try_doit doit_redir
+ tempdir dispatch comparefiles
+ $verbose $debug $keep);
+
+our $verbose=0;
+our $debug=0;
+our $keep=0;
+
+sub progname {
+ my $name=$0;
+ $name=~s!^.*/(.+)$!$1!;
+ return $name
+}
+
+sub error {
+ die progname().": @_\n";
+}
+
+sub message {
+ print STDERR progname().": @_\n";
+}
+
+sub debug {
+ message(@_) if $debug;
+}
+
+sub vprint {
+ message(@_) if $verbose;
+}
+
+sub doit {
+ if (try_doit(@_) != 0) {
+ error "command failed: @_";
+ }
+}
+
+sub try_doit {
+ vprint(@_);
+ return system(@_)
+}
+
+sub doit_redir {
+ no warnings 'once';
+ my ($in, $out, @args) = @_;
+ vprint(@args, "<", $in, ">", $out);
+ open INFILE, "<", $in or die("Could not open '$in' for reading: $!\n");
+ open OUTFILE, ">", $out or die("Could not open '$out' for reading: $!\n");
+ my $pid = open2(">&OUTFILE", "<&INFILE", @args);
+ waitpid $pid, 0;
+ if ($? != 0) {
+ error "command failed: @args";
+ }
+}
+
+sub tempdir {
+ return File::Temp::tempdir("pristine-tar.XXXXXXXXXX",
+ TMPDIR => 1, CLEANUP => !$keep);
+}
+
+# Workaround for bug #479317 in perl 5.10.
+sub END {
+ chdir("/");
+}
+
+sub dispatch {
+ my %params=@_;
+
+ my %commands=%{$params{commands}};
+ my %options=%{$params{options}} if exists $params{options};
+
+ my $command;
+ Getopt::Long::Configure("bundling");
+ if (! GetOptions(%options,
+ "v|verbose!" => \$verbose,
+ "d|debug!" => \$debug,
+ "k|keep!" => \$keep) ||
+ ! @ARGV) {
+ $command="usage";
+ }
+ else {
+ $command=shift @ARGV;
+ }
+
+ my $i=$commands{$command};
+ if (! defined $i) {
+ error "Unknown subcommand \"$command\"";
+ }
+
+ # Check that the right number of args were passed by user.
+ if (defined $i->[1] && @ARGV != $i->[1]) {
+ $command="usage";
+ $i=$commands{$command};
+ }
+
+ $i->[0]->(@ARGV);
+}
+
+sub comparefiles {
+ my ($old, $new) = (shift, shift);
+ system('cmp', '-s', $old, $new);
+
+ if ($? == -1 || $? & 127) {
+ die("Failed to execute cmp: $!\n");
+ }
+
+ return $? >> 8;
+}
+
+1
--- /dev/null
+#!/usr/bin/perl
+# pristine-tar delta file library
+# See delta-format.txt for details about the contents of delta files.
+package Pristine::Tar::Delta;
+
+use Pristine::Tar;
+use warnings;
+use strict;
+
+# Checks if a field of a delta should be stored in the delta hash using
+# a filename. (Normally the hash stores the whole field value, but
+# using filenames makes sense for a few fields.)
+my %delta_files=map { $_ => 1 } qw(manifest delta wrapper);
+sub is_filename {
+ my $field=shift;
+ return $delta_files{$field};
+}
+
+sub handler {
+ my $action=shift;
+ my $type=shift;
+
+ my $class="Pristine::Tar::Delta::$type";
+ eval "use $class";
+ if ($@) {
+ error "unsupported delta file format $type";
+ }
+ $class->$action(@_);
+}
+
+# After the type of delta and the file to create (which can be "-"
+# to send it to stdout), this takes a hashref containing the contents of
+# the delta to write.
+sub write {
+ my $type=shift;
+ my $deltafile=shift;
+ my $delta=shift;
+
+ my $tempdir=tempdir();
+
+ my $stdout=0;
+ if ($deltafile eq "-") {
+ $stdout=1;
+ $deltafile="$tempdir/tmpout";
+ }
+
+ handler('write', $type, $deltafile, $delta);
+
+ if ($stdout) {
+ doit("cat", $deltafile);
+ unlink($deltafile);
+ }
+
+ return $delta;
+}
+
+# Returns a hashref of the contents of the delta.
+sub read {
+ my $type=shift;
+ my $deltafile=shift;
+
+ my $tempdir=tempdir();
+
+ my $stdin=0;
+ if ($deltafile eq "-") {
+ $deltafile="$tempdir/tmpin";
+ open (my $out, ">", $deltafile) || die "$deltafile: $!";
+ while (<STDIN>) {
+ print $out $_;
+ }
+ close $out;
+ }
+
+ my $delta=handler('read', $type, $deltafile);
+
+ unlink($deltafile) if $stdin;
+
+ return $delta;
+}
+
+# Checks the type, maxversion, minversion of a delta hashref.
+# Checks that the delta contains all specified fields.
+# Returns the hashref if it is ok.
+sub assert {
+ my $delta=shift;
+ my %params=@_;
+
+ if (! exists $delta->{version}) {
+ error "delta lacks version";
+ }
+ if (defined $params{maxversion}) {
+ if ($delta->{version} > $params{maxversion}) {
+ error "delta is version ".$delta->{version}.", newer than maximum supported version $params{maxversion}";
+ }
+ }
+ if (defined $params{minversion}) {
+ if ($delta->{version} < $params{minversion}) {
+ error "delta is version ".$delta->{version}.", older than minimum supported version $params{minversion}";
+ }
+ }
+
+ if (! exists $delta->{type}) {
+ error "delta lacks type";
+ }
+ if (defined $params{type}) {
+ if ($delta->{type} ne $params{type}) {
+ error "delta is for a ".$delta->{type}.", not a $params{type}";
+ }
+ }
+
+ if ($params{fields}) {
+ foreach my $key (@{$params{fields}}) {
+ if (! exists $delta->{$key}) {
+ error "delta lacks $key";
+ }
+ }
+ }
+
+ return $delta;
+}
+
+1
--- /dev/null
+#!/usr/bin/perl
+# pristine-tar delta files formatted as tarballs
+package Pristine::Tar::Delta::Tarball;
+
+use Pristine::Tar;
+use Pristine::Tar::Delta;
+use File::Basename;
+use warnings;
+use strict;
+
+sub write {
+ my $class=shift;
+ my $deltafile=shift;
+ my $delta=shift;
+
+ my $tempdir=tempdir();
+
+ foreach my $field (keys %$delta) {
+ if (Pristine::Tar::Delta::is_filename($field)) {
+ link($delta->{$field}, "$tempdir/$field") || die "link $tempdir/$field: $!";
+ }
+ else {
+ open (my $out, ">", "$tempdir/$field") || die "$tempdir/$field: $!";
+ print $out $delta->{$field}."\n";
+ close $out;
+ }
+ }
+
+ doit("tar", "czf", $deltafile, "-C", $tempdir, keys %$delta);
+
+ return $delta;
+}
+
+sub read {
+ my $class=shift;
+ my $deltafile=shift;
+
+ my $tempdir=tempdir();
+ doit("tar", "xf", File::Spec->rel2abs($deltafile), "-C", $tempdir);
+
+ my %delta;
+ foreach my $file (glob("$tempdir/*")) {
+ if (-f $file) {
+ my $field=basename($file);
+ if (Pristine::Tar::Delta::is_filename($field)) {
+ $delta{$field}=$file;
+ }
+ else {
+ open (my $in, "<", $file) || die "$file: $!";
+ {
+ local $/=undef;
+ $delta{$field}=<$in>;
+ }
+ chomp $delta{$field};
+ close $in;
+ }
+ }
+ }
+
+ return \%delta;
+}
+
+1
--- /dev/null
+#!/usr/bin/perl
+# pristine-tar file format parsing
+
+package Pristine::Tar::Formats;
+
+use warnings;
+use strict;
+use Exporter q{import};
+our @EXPORT=qw{is_gz is_bz2 is_xz %fconstants};
+
+our %fconstants=(
+ # magic identification
+ GZIP_ID1 => 0x1F,
+ GZIP_ID2 => 0x8B,
+ BZIP2_ID1 => 0x42,
+ BZIP2_ID2 => 0x5a,
+ XZ_ID1 => 0xFD,
+ XZ_ID2 => 0x37,
+ XZ_ID3 => 0x7A,
+ XZ_ID4 => 0x58,
+ XZ_ID5 => 0x5A,
+ XZ_ID6 => 0x00,
+
+ # compression methods
+ # 0x00-0x07 are reserved
+ GZIP_METHOD_DEFLATE => 0x08,
+ # 'h' for Bzip2 ('H'uffman coding)
+ BZIP2_METHOD_HUFFMAN => 0x68,
+
+ # flags
+ GZIP_FLAG_FTEXT => 0,
+ GZIP_FLAG_FHCRC => 1,
+ GZIP_FLAG_FEXTRA => 2,
+ GZIP_FLAG_FNAME => 3,
+ GZIP_FLAG_FCOMMENT => 4,
+ # the rest are reserved
+
+ # compression level
+ GZIP_COMPRESSION_NORMAL => 0,
+ GZIP_COMPRESSION_BEST => 2,
+ GZIP_COMPRESSION_FAST => 4,
+
+ # operating systems
+ GZIP_OS_MSDOS => 0,
+ GZIP_OS_AMIGA => 1,
+ GZIP_OS_VMS => 2,
+ GZIP_OS_UNIX => 3,
+ GZIP_OS_VMCMS => 4,
+ GZIP_OS_ATARI => 5,
+ GZIP_OS_HPFS => 6,
+ GZIP_OS_MACINTOSH => 7,
+ GZIP_OS_ZSYSTEM => 8,
+ GZIP_OS_CPM => 9,
+ GZIP_OS_TOPS => 10,
+ GZIP_OS_NTFS => 11,
+ GZIP_OS_QDOS => 12,
+ GZIP_OS_RISCOS => 13,
+ GZIP_OS_VFAT => 14,
+ GZIP_OS_UNKNOWN => 255,
+);
+
+sub magic {
+ my $file=shift;
+
+ open (my $in, "<", $file) || die "$file: $!";
+ my $count=$#_+1;
+ my ($chars, @bits);
+ my $ret = (
+ read($in, $chars, $count) == $count &&
+ (@bits = unpack(("C" x $count), $chars)) &&
+ (! grep { $bits[$_] != $_[$_] } (0..$count-1))
+ );
+ close $in;
+ return $ret;
+}
+
+sub is_gz {
+ magic(shift, $fconstants{GZIP_ID1}, $fconstants{GZIP_ID2},
+ $fconstants{GZIP_METHOD_DEFLATE});
+}
+
+sub is_bz2 {
+ magic(shift, $fconstants{BZIP2_ID1}, $fconstants{BZIP2_ID2},
+ $fconstants{BZIP2_METHOD_HUFFMAN});
+}
+
+sub is_xz {
+ magic(shift, $fconstants{XZ_ID1}, $fconstants{XZ_ID2},
+ $fconstants{XZ_ID3}, $fconstants{XZ_ID4},
+ $fconstants{XZ_ID5}, $fconstants{XZ_ID6});
+}
+
+1
--- /dev/null
+pristine-tar can regenerate a pristine upstream tarball using only a small
+binary delta file and a revision control checkout of the upstream branch.
+
+The package also includes a pristine-gz command, which can regenerate a
+pristine .gz file, a pristine-bz2 for .bz2 files, and a pristine-xz for .xz
+files.
+
+The delta file is designed to be checked into revision control along-side
+the upstream branch, thus allowing Debian packages to be built entirely
+using sources in revision control, without the need to keep copies of
+upstream tarballs.
--- /dev/null
+* Investigate files that the programs cannot reproduce. Such files are stored
+ in the testsuite git branch.
+
+* Would be nice to keep a md5sums list of the files in the manifest and
+ check and error if any are different. The error message from xdelta when
+ a source file doesn't have the right checksup is fairly obscure and
+ doesn't aid in fixing the problem.
+
+ There's an implementation of this in the manifest-md5sums branch of
+ git://git.debian.org/git/users/kibi-guest/pristine-tar.git , but I have
+ not yet decided about applying it, since it would bloat the delta files
+ with a list of all the files and md5sums..
+
+* Optimisation: Enhance zgz so it runs multiple compression alternatives
+ block-by-block in parallell, aborting compressors when they differ
+ from the target file.
+
+* Add binary deltas for unreproducible bz2 files. (But currently, only two
+ bz2 files are known that fails to reproduce: nsis and freecol in testsuite.)
+
+* Support checkout/checkin using other VCS than git.
+
+ bzr-builddeb stores pristine-tar data in bzr repositories.
+ The delta is stored in a bzr revprop named "deb-pristine-delta"
+ or "deb-pristine-delta-bz2".
--- /dev/null
+pristine-tar (1.28) unstable; urgency=low
+
+ * Update lintian overrides.
+
+ -- Joey Hess <joeyh@debian.org> Sun, 05 May 2013 01:45:27 -0400
+
+pristine-tar (1.27) unstable; urgency=low
+
+ * Now ported to Mac OS X.
+ - MakeFile.PL fixes
+ - zgz: Use DYLD_LIBRARY_PATH on OSX instead of LD_LIBRARY_PATH
+ - suse-bzip2/Makefile: compile shared library appropriately on OSX
+ - INSTALL: Added some options useful when installing on OSX
+ Thanks, Torsten Maehne and Philipp A. Hartmann.
+ * zgz: Don't hardcode /lib, avoid segfaulting when installed in a
+ > 128 character path.
+ Thanks, Colin Walters
+ * Fix typo that led to incorrect error message when pristine-tar
+ branch does not exist. Closes: #700448 Thanks, paul cannon
+
+ -- Joey Hess <joeyh@debian.org> Sat, 04 May 2013 23:50:40 -0400
+
+pristine-tar (1.26) unstable; urgency=low
+
+ * pristine-xz: Use xz --robot to extract information from xz files,
+ avoiding the need to do more expensive guessing. Support --block-list
+ when available to reproduce multi block files.
+ Closes: #677250 Thanks, Vincent Ladeuil
+
+ -- Joey Hess <joeyh@debian.org> Sat, 25 Aug 2012 11:54:46 -0400
+
+pristine-tar (1.25) unstable; urgency=low
+
+ * Remove unused fts.h include. Closes: #675367
+ * pristine-xz: Add --check=sha256 and compression levels 0 and 0e.
+ Closes: #677241 Thanks, Vincent Ladeuil
+
+ -- Joey Hess <joeyh@debian.org> Tue, 12 Jun 2012 11:45:33 -0400
+
+pristine-tar (1.24) unstable; urgency=low
+
+ * pristine-xz: Add --check=crc32 to list of allowed parameters.
+
+ -- Joey Hess <joeyh@debian.org> Sun, 01 Apr 2012 12:21:24 -0400
+
+pristine-tar (1.23) unstable; urgency=low
+
+ * Detect git submodules procuded by recent git, where .git is a file,
+ not a directory. Closes: #666033
+ * pristine-xz: Handle CRC32 files made with PylibLZMA. Thanks, Mike Miller
+ Closes: #662129, #660783
+
+ -- Joey Hess <joeyh@debian.org> Sat, 31 Mar 2012 19:00:49 -0400
+
+pristine-tar (1.22) unstable; urgency=low
+
+ * Store the sha1 of the tree that is being committed, rather than
+ a sha1 of a commit or other object that points to the tree.
+ This makes committed tarballs more resilient against git filter-branch
+ when it's only used to change commit metadata. Closes: #467288
+
+ -- Joey Hess <joeyh@debian.org> Sun, 11 Mar 2012 18:49:12 -0400
+
+pristine-tar (1.21) unstable; urgency=low
+
+ * Fix bug in mtime resetting code, which caused delta files to be created
+ that failed to regenerate the original tarball. Closes: #661902
+
+ -- Joey Hess <joeyh@debian.org> Fri, 02 Mar 2012 14:57:11 -0400
+
+pristine-tar (1.20) unstable; urgency=low
+
+ * pristine-xz: Try --extreme too. While my corpus has no such xz files,
+ Darren Salt points out that automake 1.11.2 has started using
+ extreme mode. Closes: #658666
+
+ -- Joey Hess <joeyh@debian.org> Sun, 12 Feb 2012 14:23:48 -0400
+
+pristine-tar (1.19) unstable; urgency=low
+
+ * Fix duplicate function oops.
+
+ -- Joey Hess <joeyh@debian.org> Wed, 01 Feb 2012 11:00:43 -0400
+
+pristine-tar (1.18) unstable; urgency=low
+
+ * pristine-xz: A simplistic xz recreator.
+ Current success rate on the Debian corpus: 70%.
+ Closes: #499489
+
+ -- Joey Hess <joeyh@debian.org> Tue, 31 Jan 2012 16:13:35 -0400
+
+pristine-tar (1.17) unstable; urgency=low
+
+ * pristine-tar: Fail when the delta is excessively large, probably
+ due to the tarball being compressed with something that tar x can
+ auto-extract, but that pristine-tar does not support.
+
+ -- Joey Hess <joeyh@debian.org> Mon, 09 Jan 2012 11:44:44 -0400
+
+pristine-tar (1.16) unstable; urgency=low
+
+ * pristine-bz2: Can recreate bz2 files greated by Suse's
+ patched bzip2. Closes: #641019
+
+ -- Joey Hess <joeyh@debian.org> Wed, 04 Jan 2012 21:44:23 -0400
+
+pristine-tar (1.15) unstable; urgency=low
+
+ * Fix Vcs-Browser url. Closes: #636926
+ * Propigate nonzero exit status from doit_redir. Closes: #600724
+ * 'pristine-tar list' displays a list of tarballs that are available for
+ checkout.
+
+ -- Joey Hess <joeyh@debian.org> Sat, 08 Oct 2011 17:53:03 -0400
+
+pristine-tar (1.14) unstable; urgency=low
+
+ * Add support for gzip --rsyncable output produced by gzip 1.4.
+ This differs from prior --rsyncable output, which was made by a Debian
+ specific patch and used a different rsync window size, and reset
+ huffman encodings less often.
+ * Clarify man page.
+
+ -- Joey Hess <joeyh@debian.org> Sat, 06 Aug 2011 21:05:15 -0400
+
+pristine-tar (1.13) unstable; urgency=low
+
+ [ Faidon Liambotis ]
+ * Add a Perl quirks mode for tarballs generated by Perl's IO::Zlib, which
+ is used among other things by Module::Build. Closes: #618284
+
+ -- Joey Hess <joeyh@debian.org> Tue, 15 Mar 2011 00:11:24 -0400
+
+pristine-tar (1.12) unstable; urgency=low
+
+ * Fix gzg building with --as-needed. Closes: #604030
+
+ -- Joey Hess <joeyh@debian.org> Sun, 06 Feb 2011 00:01:18 -0400
+
+pristine-tar (1.11) unstable; urgency=low
+
+ * Add workaround for Debian's tar changing its output for tarballs
+ containing filenames exactly 100 bytes long. Closes: #602907
+ (Needs tar 1.25-2 with #603231 fixed in order for that to work.)
+
+ -- Joey Hess <joeyh@debian.org> Fri, 12 Nov 2010 10:25:46 -0400
+
+pristine-tar (1.10) unstable; urgency=low
+
+ * pristine-gz gengz: Bugfix: Always remove uncompressed input file.
+ * Large refactoring and modularization. (Thanks Gabriel de Perthuis
+ for inspiration for this.))
+ * Remove environment variables used by tar, gz, and bzip2, to avoid
+ local environment settings possibly breaking things.
+ Closes: #498760 (probably; thanks Ralph Lange for analysis)
+ * Lintian fixes.
+
+ -- Joey Hess <joeyh@debian.org> Thu, 19 Aug 2010 16:36:25 -0400
+
+pristine-tar (1.03) unstable; urgency=low
+
+ * zgz now includes a trimmed down copy of the compressor from bzip2 0.9.5d.
+ That old version of bzip2 generated different compression results,
+ and is the overwhelming reason for failures to reproduce bz2 files
+ in the Debian archive. Closes: #560170, #579657, #525128, #576119
+ (Special thanks to Laszlo Ersek for tracking this down.)
+ * Awesome new zgz man page!
+ * Faster generation of bzip2 deltas: Do not repeatedly decompress
+ input file.
+ * pristine-bz2 -t can be used to make it try harder to generate
+ a delta. Currently, this tries pbzip2 -b with various numbers.
+ Not the default because it's slow and I don't have any bzip2 files
+ from the wild that were built that way.
+
+ -- Joey Hess <joeyh@debian.org> Thu, 13 May 2010 02:19:32 -0400
+
+pristine-tar (1.01) unstable; urgency=low
+
+ * Use italics in man pages to highlight which parts of command
+ lines are file names. Closes: #561015
+ * Added an example. Closes: #561016
+ * Document TMPDIR in man pages. Closes: #558266
+
+ -- Joey Hess <joeyh@debian.org> Fri, 05 Feb 2010 16:41:07 -0500
+
+pristine-tar (1.00) unstable; urgency=low
+
+ * pristine-gz: Fall back to storing a binary delta, in the rare
+ cases where the file cannot be 100% reproduced. A warning message
+ is printed if the binary delta is not relatively small.
+ * Allows generating quite small deltas for php-geoip,
+ xsupplicant, libgraphics-colornames-perl,
+ Ricoh-Aficio_2020D-Postscript.ppd.gz, and dozens on others
+ that zgz can closely replicate. Closes: #518972, #506874
+ * For other things the deltas are not as small.
+ This seems an accepable tradeoff to be able to reliably use it on
+ anything. Closes: #475778, #509703, #509707, #515256, #515331
+ * Increase gz delta version number to 3.0 if a binary delta file
+ is included.
+ * pristine-tar: Avoid dying in corner case involving tar's filename
+ encoding. Fixes several failures.
+ * pristine-tar: Avoid dying if tar tv exits nonzero. This makes
+ reproducing star's tarball work, even though tar gets upset
+ while listing it and decides to die at the end.
+ * pristine-gz: Avoid passing -F to zgz if --original-name
+ is passed. This bug prevented pristine-gz gengz from
+ recreating the gz in some cases.
+ * Add aliases ci and co for commit and checkout. Closes: #500388
+ * pristine-gz: Fix generation of gz files that have a null filename field.
+ * pristine-tar: Fix behavior in the corner case where the tarball
+ puts all files in a subdir, but does not contain the subdir's directory
+ entry.
+
+ Stats: Successfully generates deltas for all 14446 tarballs in the
+ Debian archive. Mean delta size: 19K Median: 2.6K Mode: 1.5K
+
+ -- Joey Hess <joeyh@debian.org> Tue, 14 Apr 2009 21:23:22 -0400
+
+pristine-tar (0.22) unstable; urgency=low
+
+ * Fix syntax mistake that could cause pristine-tar to in some cases
+ fail on tarballs containing files named "0". Closes: #523773
+
+ -- Joey Hess <joeyh@debian.org> Sun, 12 Apr 2009 13:20:04 -0400
+
+pristine-tar (0.21) unstable; urgency=low
+
+ * Add support for GIT_DIR. Closes: #512619
+
+ -- Joey Hess <joeyh@debian.org> Thu, 22 Jan 2009 15:07:33 -0500
+
+pristine-tar (0.20) unstable; urgency=low
+
+ * Avoid littering .orig.tar.gz.tmp files around by building intermediate
+ tarball in the temp dir. Closes: #508965
+
+ -- Joey Hess <joeyh@debian.org> Mon, 29 Dec 2008 15:34:12 -0500
+
+pristine-tar (0.19) unstable; urgency=low
+
+ [ Josh Triplett ]
+ * Add a .gitignore file
+ * Various cleanups to zgz.
+ * Remove the unnecessary -l, -S, -t, and -v flags from zgz.
+ * Allow the empty string as an original filename in zgz, rather than
+ treating the empty string as a flag to not store an original filename.
+ * Fix zgz's usage message to stop identifying the program as gzip.
+ * Add a new -T,--timestamp flag to zgz, to explicitly set the timestamp
+ stored in the gzip file, rather than taking the timestamp of the input
+ file. Closes: #507110
+
+ [ Joey Hess ]
+ * zgz: Avoid using uninitialized data as timestamp in -c mode.
+ Closes: #507095
+ * Document existing long options. Closes: #499488
+ * Avoid exposing tar file names to the shell. Closes: #500499
+ * Clarify bit in man page about what file formats are supported.
+ Closes: #507322
+
+ [ Josh Triplett ]
+ * zgz: Incorporate a cut-down version of GNU gzip to support the --gnu
+ option. The cut-down gzip includes support for explicitly setting the
+ timestamp and original filename. Closes: #506627
+ * pristine-gz: Now that zgz supports explicitly setting the timestamp and
+ original filename with both --zlib and --gnu, use that support to do all
+ compression using -c with standard input and standard output. This
+ removes the need to create a temporary file with the original filename and
+ set its timestamp, as well as the need to continuously recreate the file
+ when compressed and removed. Closes: #506627
+ * zgz: Remove support for files, making -c the default. This removes a lot
+ of complexity and code duplication.
+
+ -- Joey Hess <joeyh@debian.org> Fri, 12 Dec 2008 16:12:27 -0500
+
+pristine-tar (0.18) unstable; urgency=low
+
+ * pristine-gz: Avoid uncompressing the original file more than once.
+ Closes: #506490
+
+ -- Joey Hess <joeyh@debian.org> Sat, 22 Nov 2008 18:22:40 -0500
+
+pristine-tar (0.17) unstable; urgency=low
+
+ * Correct -f order to come after --gnu.
+
+ -- Joey Hess <joeyh@debian.org> Fri, 04 Jul 2008 14:46:30 -0400
+
+pristine-tar (0.16) unstable; urgency=low
+
+ * pristine-gz: Always pass -f to zgz, to support cases where
+ the gzip header claims that the original input file had an extension
+ that suggests it was itself already compressed. (Although it can't really
+ be.) Not doing the same for gzip because -f doesn't cause it to ignore
+ extensions. See #475778
+
+ -- Joey Hess <joeyh@debian.org> Fri, 04 Jul 2008 14:29:54 -0400
+
+pristine-tar (0.15) unstable; urgency=low
+
+ * Fix POD issues. Closes: #484165
+ * zgz: Remove support for a GZIP env variable. We don't need this in
+ pristine-tar, and if could screw things up if a user set it.
+ Closes: #488986
+
+ -- Joey Hess <joeyh@debian.org> Wed, 02 Jul 2008 12:46:41 -0400
+
+pristine-tar (0.14) unstable; urgency=low
+
+ * Use debhelper v7; rules file minimisation.
+ * Add build and install targets to Makefile.
+ * Put in a workaround for bug #479317, an incompatability in perl 5.10
+ that causes nonzero exit if a program exits while chdired into a
+ subdirectory of a File::Temp temp directory.
+
+ -- Joey Hess <joeyh@debian.org> Sun, 04 May 2008 14:47:06 -0400
+
+pristine-tar (0.13) unstable; urgency=low
+
+ * Man page typo fix. Closes: #475698
+
+ -- Joey Hess <joeyh@debian.org> Sat, 19 Apr 2008 16:51:09 -0400
+
+pristine-tar (0.12) unstable; urgency=low
+
+ * pristine-tar: Fix some bugs when run on an uncompressed tarball.
+
+ -- Joey Hess <joeyh@debian.org> Wed, 02 Apr 2008 13:14:45 -0400
+
+pristine-tar (0.11) unstable; urgency=low
+
+ * Unset $keep, don't keep temp dirs. Oops.
+
+ -- Joey Hess <joeyh@debian.org> Fri, 21 Mar 2008 14:50:21 -0400
+
+pristine-tar (0.10) unstable; urgency=low
+
+ * pristine-tar: Add -m option to specify a commit message. Closes: #465231
+
+ -- Joey Hess <joeyh@debian.org> Mon, 10 Mar 2008 15:56:05 -0400
+
+pristine-tar (0.9) unstable; urgency=low
+
+ * Add smart branching for commits. (Cyril Brulebois)
+ * Prefer to commit to the ref that exactly matches what is specified at the
+ command line.
+ * Send all debug and verbose prints to stderr, reserving stdout for
+ outputting deltas etc.
+ * pristine-tar commit was not generating deltas against the specified
+ upstream branch, but against the unpacked contents of the source tarball.
+ Fix it to use the upstream branch, ensuring that no matter what branch is
+ given, the delta that is created can always recreate the source tarball.
+
+ -- Joey Hess <joeyh@debian.org> Wed, 06 Feb 2008 14:31:29 -0500
+
+pristine-tar (0.8) unstable; urgency=low
+
+ * If a tarball contains files all in one subdirectory, and the source
+ tree it's being generated from already has that subdirectory, don't
+ try to create the subdir, which would fail. OTOH, if the subdirectory
+ isn't there, proceed with creating it as before.
+ * Add support for bz2 files (Cyril Brulebois)
+ * Recommends bzip2 and pbzip2, which both might be needed when dealing
+ with bz2 files due to differences in their output.
+
+ -- Joey Hess <joeyh@debian.org> Sat, 02 Feb 2008 17:28:17 -0500
+
+pristine-tar (0.7) unstable; urgency=low
+
+ * Improve/fix handling when there is no local pristine-tar branch.
+ * Add a newline to the .id files committed to git.
+
+ -- Joey Hess <joeyh@debian.org> Fri, 01 Feb 2008 22:13:06 -0500
+
+pristine-tar (0.6) unstable; urgency=low
+
+ * Improve search for upstream branch. Default to looking for first
+ refs/heads/upstream, and failing that, anything with "upstream" in its
+ name. This way if there is a local upstream branch and a remote one, it
+ will use the local one. If there's only a remote one, it'll use that.
+ Closes: #463566
+ * Handle the case where there is no local pristine-tar branch. If there
+ is exactly one remote branch, use it for checkout. If more than one or
+ none, show a nice error message. (Cyril Brulebois)
+
+ -- Joey Hess <joeyh@debian.org> Fri, 01 Feb 2008 21:35:37 -0500
+
+pristine-tar (0.5) unstable; urgency=low
+
+ * Moved to git, and added a Vcs-Browser field.
+ * pristine-tar can now "commit" deltas for a tarball directly to a git
+ branch, and then "checkout" the original tarball again. Git users
+ are recommended to use these new subcommands because they're easier,
+ store the deltas in a consistent location, and avoid problems with
+ recreating things like empty directories that git doesn't track.
+ Closes: #463352
+ * Thanks to madcoder for help with manipulating git branches without
+ touching the working copy.
+ * Fix paranoia check in pristine-gz to correctly handle parameters
+ that take an option.
+
+ -- Joey Hess <joeyh@debian.org> Thu, 31 Jan 2008 21:52:45 -0500
+
+pristine-tar (0.4) unstable; urgency=low
+
+ * Allow the delta file to be read or written from stdio.
+ * Fix man page synopses formatting.
+
+ -- Joey Hess <joeyh@debian.org> Sat, 24 Nov 2007 16:45:04 -0500
+
+pristine-tar (0.3) unstable; urgency=low
+
+ * pristine-tar sometimes got confused about tarballs that did not unpack
+ all files into a subdir. Fixes sear-media and 30 others.
+ * tar was confused by files starting with ./ or / in the manifest, so
+ strip it out. Fixes erlang-doc-html and 19 others, including doc-fdc,
+ which is the only package to have files in / in its tarball.
+ * Some tarballs put files in a subdir, but don't show a "/" after the subdir
+ name in a manifest. Stop relying on that. (example: streamtuner)
+
+ Current stats: Out of the whole debian archive, pristine-gz fails
+ on 132 files, and pristine-tar fails on 0. Success with 98.97% of
+ files.
+
+ -- Joey Hess <joeyh@debian.org> Wed, 03 Oct 2007 00:07:54 -0400
+
+pristine-tar (0.2) unstable; urgency=low
+
+ * Added pristine-gz, thanks to paravoid for making this possible!
+ * Added zgz, which is derived from a BSD gzip program that uses libz.
+ Modified by paravoid to support many options needed to reproduce gz
+ files.
+ * Renamed the subcommands extract => gentar , stash => gendelta
+ * Quite a lot of testing (ie, on the entire Debian archive) and bugfixes.
+ * Put files in the generated tarball mode 0644 pre-delta, this is a much
+ more likely file mode than the previous 0000 and thus makes the delta
+ smaller.
+ * File format version is up to 2.0 due to misc incompatible changes.
+ * Fix a bug related to tar's handling of unicode filenames.
+ * Work around a strange tar behavior: When run with --mode 644, tar
+ preserves the sgid bit on subdirectories.
+
+ Current stats: Out of the whole debian archive, pristine-gz fails
+ on 131 files, and pristine-tar fails on 45. Success with 98.63% of
+ files.
+
+ -- Joey Hess <joeyh@debian.org> Tue, 02 Oct 2007 21:51:03 -0400
+
+pristine-tar (0.1) unstable; urgency=low
+
+ * First release.
+
+ -- Joey Hess <joeyh@debian.org> Sun, 30 Sep 2007 20:06:00 -0400
--- /dev/null
+Source: pristine-tar
+Section: utils
+Priority: optional
+Build-Depends: debhelper (>= 7.0.50), dpkg-dev (>= 1.9.0), zlib1g-dev, perl
+Maintainer: Joey Hess <joeyh@debian.org>
+Standards-Version: 3.9.3
+Vcs-Git: git://git.kitenet.net/pristine-tar/
+Vcs-Browser: http://git.kitenet.net/?p=pristine-tar.git
+Homepage: http://kitenet.net/~joey/code/pristine-tar/
+
+Package: pristine-tar
+Architecture: any
+Section: utils
+Depends: xdelta, ${shlibs:Depends}, ${misc:Depends}, perl-modules
+Recommends: pbzip2, bzip2, xz-utils
+Description: regenerate pristine tarballs
+ pristine-tar can regenerate a pristine upstream tarball using only a small
+ binary delta file and a revision control checkout of the upstream branch.
+ .
+ The package also includes a pristine-gz command, which can regenerate a
+ pristine .gz file, a pristine-bz2 for .bz2 files, and a pristine-xz for .xz
+ files.
+ .
+ The delta file is designed to be checked into revision control along-side
+ the upstream branch, thus allowing Debian packages to be built entirely
+ using sources in revision control, without the need to keep copies of
+ upstream tarballs.
--- /dev/null
+Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Source: zgz is based on NetBSD's gzip
+
+Files: *
+Copyright: © 2007-2010 Joey Hess <joeyh@debian.org>
+ © 2007 Faidon Liambotis
+ © 2008 Cyril Brulebois <cyril.brulebois@enst-bretagne.fr>
+ © 2008 Josh Triplett <josh@joshtriplett.org>
+License: GPL-2+
+
+Files: zgz/zgz.c
+Copyright: © 1997, 1998, 2003, 2004, 2006 Matthew R. Green
+ © 2007 Faidon Liambotis
+ © 2008 Josh Triplett
+ © 2010 Joey Hess
+License: BSD-3
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+
+Files: zgz/gzip/*
+Copyright: © 1997, 1998, 1999, 2001, 2002, 2006, 2007 Free Software Foundation, Inc.
+ © 1992-1993 Jean-loup Gailly
+ © 2008 Josh Triplett
+License: GPL-2+
+
+Files: zgz/old-bzip2/* zgz/pit/suse-bzip2/*
+Copyright: © 1996-2007 Julian R Seward
+License: other
+ Copyright (C) 1996-2007 Julian R Seward. All rights reserved.
+ .
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+ .
+ 1. Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ .
+ 2. The origin of this software must not be misrepresented; you must
+ not claim that you wrote the original software. If you use this
+ software in a product, an acknowledgment in the product
+ documentation would be appreciated but is not required.
+ .
+ 3. Altered source versions must be plainly marked as such, and must
+ not be misrepresented as being the original software.
+ .
+ 4. The name of the author may not be used to endorse or promote
+ products derived from this software without specific prior written
+ permission.
+ .
+ THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
+ OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+License: GPL-2+
+ On Debian systems, the complete text of the GPL can be found in
+ /usr/share/common-licenses/GPL.
--- /dev/null
+TODO delta-format.txt README
--- /dev/null
+# pristine-tar contains several embedded and modified compressors,
+# which are only used to recreate original tarballs.
+embedded-library usr/lib/pristine-tar/suse-bzip2/libbz2.so: bzip2
+embedded-library usr/lib/pristine-tar/suse-bzip2/libbz2.so.1.0: bzip2
+embedded-library usr/lib/pristine-tar/suse-bzip2/libbz2.so.1.0.4: bzip2
--- /dev/null
+#!/usr/bin/make -f
+%:
+ dh $@
+
+override_dh_auto_configure:
+ # keeps it out of /usr/local
+ dh_auto_configure -- PREFIX=/usr
+
+override_dh_auto_clean:
+ # distclean moans about MANIFEST, this is quieter
+ if [ -e Makefile ]; then $(MAKE) realclean; fi
+
+override_dh_makeshlibs:
+ # only contains private libraries
+
--- /dev/null
+The delta file is a compressed tarball, containing the following files:
+
+version
+ Currently "2.0" or "3.0".
+type
+ Type of file this is a delta for ("tar", "gz", or "bz2").
+
+
+For tar files, it contains:
+
+manifest
+ List of all files in the tarball, as output by `tar t`.
+ Used to order files correctly when rebuilding it.
+delta
+ xdelta between the generated tarball and the original tarball.
+wrapper
+ Encapsulated delta file for the .gz or .bz2 wrapper for the
+ tarball. Optional, if not present a pristine .gz won't be generated.
+
+
+For gz files, wrapper contains:
+
+params
+ Parameters to pass to zgz.
+ ("-n 9", "-M", "--rsyncable")
+timestamp
+ Timestamp of the original input file, in seconds from epoch.
+filename
+ Filename of the original input file.
+delta
+ xdelta between the generated gz file and the original gz file.
+ (Optional; needs version "3.0".)
+
+
+For bzip2 files the wrapper contains:
+
+params
+ Typically, only the compression level is needed (4th byte of the
+ compressed file), and its matching parameter stored: -N.
+ In some cases a -bN parameter is detected and stored.
+program
+ Program used to compress. Almost everytime, it is bzip2 (or another
+ implementation producing bit-identical results). pbzip2 might also be
+ detected, but several parameters might interfere (-r, -pN).
+
+ It may also be zgz (the params will include --old-bzip2 in this
+ case).
+
+For xz files, the wrapper contains:
+
+params
+ Typically, only the compression level is needed.
+program
+ Program used to compress. Almost everytime, it is xz.
--- /dev/null
+
+--------------------------------------------------------------------------
+
+This program, "bzip2", the associated library "libbzip2", and all
+documentation, are copyright (C) 1996-2010 Julian R Seward. All
+rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+
+1. Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+
+2. The origin of this software must not be misrepresented; you must
+ not claim that you wrote the original software. If you use this
+ software in a product, an acknowledgment in the product
+ documentation would be appreciated but is not required.
+
+3. Altered source versions must be plainly marked as such, and must
+ not be misrepresented as being the original software.
+
+4. The name of the author may not be used to endorse or promote
+ products derived from this software without specific prior written
+ permission.
+
+THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
+OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+Julian Seward, jseward@bzip.org
+bzip2/libbzip2 version 1.0.6 of 6 September 2010
+
+--------------------------------------------------------------------------
--- /dev/null
+# ------------------------------------------------------------------
+# This file is part of bzip2/libbzip2, a program and library for
+# lossless, block-sorting data compression.
+#
+# bzip2/libbzip2 version 1.0.6 of 6 September 2010
+# Copyright (C) 1996-2010 Julian Seward <jseward@bzip.org>
+#
+# Please read the WARNING, DISCLAIMER and PATENTS sections in the
+# README file.
+#
+# This program is released under the terms of the license contained
+# in the file LICENSE.
+# ------------------------------------------------------------------
+
+somajor=1.0
+sominor=$(somajor).4
+SHELL=/bin/sh
+
+# Determine the operating system name to decide whether to build a
+# shared object library libbz2.so or a dynamic library libbz2.dylib.
+UNAME_S := $(shell uname -s)
+
+# To assist in cross-compiling
+CC=gcc
+AR=ar
+RANLIB=ranlib
+LDFLAGS=
+
+BIGFILES=-D_FILE_OFFSET_BITS=64
+CFLAGS=-Wall -Winline -O2 -g $(BIGFILES) $(DEBCFLAGS)
+
+# Where you want it installed when you do 'make install'
+PREFIX=/usr/local
+
+
+OBJS= blocksort.o \
+ huffman.o \
+ crctable.o \
+ randtable.o \
+ compress.o \
+ decompress.o \
+ bzlib.o
+
+all: libbz2.a bzip2
+
+ifeq ("$(UNAME_S)","Darwin")
+soext=dylib
+soext_major=$(somajor).$(soext)
+soext_minor=$(sominor).$(soext)
+LDDLFLAGS=-dynamiclib \
+ -Wl,-headerpad_max_install_names,-undefined,dynamic_lookup,-compatibility_version,$(somajor),-current_version,$(sominor),-install_name,$(PREFIX)/lib/zgz/suse-bzip2/libbz2.$(soext_minor)
+else
+soext=so
+soext_major=$(soext).$(somajor)
+soext_minor=$(soext).$(sominor)
+LDDLFLAGS=-shared -Wl,-soname,libbz2.$(soext_major)
+endif
+
+bzip2: libbz2.$(soext) bzip2.o
+ $(CC) $(CFLAGS) $(LDFLAGS) -o bzip2 bzip2.o -L. -lbz2
+
+bzip2recover: bzip2recover.o
+ $(CC) $(CFLAGS) $(LDFLAGS) -o bzip2recover bzip2recover.o
+
+libbz2.a: $(OBJS)
+ rm -f libbz2.a
+ $(AR) cq libbz2.a $(OBJS)
+ @if ( test -f $(RANLIB) || test -f /usr/bin/ranlib || \
+ test -f /bin/ranlib || test -f /usr/ccs/bin/ranlib ) ; then \
+ echo $(RANLIB) libbz2.a ; \
+ $(RANLIB) libbz2.a ; \
+ fi
+
+libbz2.$(soext): libbz2.$(soext_major)
+ ln -sf $< $@
+
+libbz2.$(soext_major): libbz2.$(soext_minor)
+ ln -sf $< $@
+
+libbz2.$(soext_minor): $(OBJS:%.o=%.sho)
+ $(CC) $(LDDLFLAGS) -o $@ $^ -lc
+
+%.sho: %.c
+ $(CC) $(CFLAGS) -D_REENTRANT -fPIC -o $@ -c $<
+
+%.o: %.c
+ $(CC) $(CFLAGS) -D_REENTRANT -o $@ -c $<
+
+check: test
+
+ifeq ("${UNAME_S}", "Darwin")
+# On Mac OS X, $DYLD_LIBRARY_PATH needs to be set to test libbz2.dylib.
+LD_PATH_VAR=DYLD_LIBRARY_PATH
+else
+# On all other (Unix-like) systems, set $LD_LIBRARY_PATH to test libbz2.so.
+LD_PATH_VAR=LD_LIBRARY_PATH
+endif
+
+test: bzip2
+ @cat words1
+ $(LD_PATH_VAR)=.:$$$(LD_PATH_VAR) \
+ ./bzip2 -1 < sample1.ref > sample1.rb2
+ $(LD_PATH_VAR)=.:$$$(LD_PATH_VAR) \
+ ./bzip2 -2 < sample2.ref > sample2.rb2
+ $(LD_PATH_VAR)=.:$$$(LD_PATH_VAR) \
+ ./bzip2 -3 < sample3.ref > sample3.rb2
+ $(LD_PATH_VAR)=.:$$$(LD_PATH_VAR) \
+ ./bzip2 -d < sample1.bz2 > sample1.tst
+ $(LD_PATH_VAR)=.:$$$(LD_PATH_VAR) \
+ ./bzip2 -d < sample2.bz2 > sample2.tst
+ $(LD_PATH_VAR)=.:$$$(LD_PATH_VAR) \
+ ./bzip2 -ds < sample3.bz2 > sample3.tst
+ cmp sample1.bz2 sample1.rb2
+ cmp sample2.bz2 sample2.rb2
+ cmp sample3.bz2 sample3.rb2
+ cmp sample1.tst sample1.ref
+ cmp sample2.tst sample2.ref
+ cmp sample3.tst sample3.ref
+ @cat words3
+
+install: bzip2 bzip2recover libbz2.a
+ if ( test ! -d $(PREFIX)/bin ) ; then mkdir -p $(PREFIX)/bin ; fi
+ if ( test ! -d $(PREFIX)/lib ) ; then mkdir -p $(PREFIX)/lib ; fi
+ if ( test ! -d $(PREFIX)/man ) ; then mkdir -p $(PREFIX)/man ; fi
+ if ( test ! -d $(PREFIX)/man/man1 ) ; then mkdir -p $(PREFIX)/man/man1 ; fi
+ if ( test ! -d $(PREFIX)/include ) ; then mkdir -p $(PREFIX)/include ; fi
+ cp -f bzip2 $(PREFIX)/bin/bzip2
+ ln $(PREFIX)/bin/bzip2 $(PREFIX)/bin/bunzip2
+ ln $(PREFIX)/bin/bzip2 $(PREFIX)/bin/bzcat
+ cp -f bzip2recover $(PREFIX)/bin/bzip2recover
+ chmod a+x $(PREFIX)/bin/bzip2
+ chmod a+x $(PREFIX)/bin/bunzip2
+ chmod a+x $(PREFIX)/bin/bzcat
+ chmod a+x $(PREFIX)/bin/bzip2recover
+ cp -f bzip2.1 $(PREFIX)/man/man1
+ chmod a+r $(PREFIX)/man/man1/bzip2.1
+ cp -f bzlib.h $(PREFIX)/include
+ chmod a+r $(PREFIX)/include/bzlib.h
+ cp -fa libbz2.a libbz2.so* $(PREFIX)/lib
+ chmod a+r $(PREFIX)/lib/libbz2.a
+ cp -f bzexe $(PREFIX)/bin/bzexe
+ chmod a+x $(PREFIX)/bin/bzexe
+ cp -f bzgrep $(PREFIX)/bin/bzgrep
+ ln -s -f $(PREFIX)/bin/bzgrep $(PREFIX)/bin/bzegrep
+ ln -s -f $(PREFIX)/bin/bzgrep $(PREFIX)/bin/bzfgrep
+ chmod a+x $(PREFIX)/bin/bzgrep
+ cp -f bzmore $(PREFIX)/bin/bzmore
+ ln -s -f $(PREFIX)/bin/bzmore $(PREFIX)/bin/bzless
+ chmod a+x $(PREFIX)/bin/bzmore
+ cp -f bzdiff $(PREFIX)/bin/bzdiff
+ ln -s -f $(PREFIX)/bin/bzdiff $(PREFIX)/bin/bzcmp
+ chmod a+x $(PREFIX)/bin/bzdiff
+ cp -f bzexe.1 bzgrep.1 bzmore.1 bzdiff.1 $(PREFIX)/man/man1
+ chmod a+r $(PREFIX)/man/man1/bzexe.1
+ chmod a+r $(PREFIX)/man/man1/bzgrep.1
+ chmod a+r $(PREFIX)/man/man1/bzmore.1
+ chmod a+r $(PREFIX)/man/man1/bzdiff.1
+ echo ".so man1/bzgrep.1" > $(PREFIX)/man/man1/bzegrep.1
+ echo ".so man1/bzgrep.1" > $(PREFIX)/man/man1/bzfgrep.1
+ echo ".so man1/bzmore.1" > $(PREFIX)/man/man1/bzless.1
+ echo ".so man1/bzdiff.1" > $(PREFIX)/man/man1/bzcmp.1
+
+clean:
+ rm -f *.o *.sho libbz2.a libbz2.so* libbz2.*.dylib \
+ bzip2 bzip2recover \
+ sample1.rb2 sample2.rb2 sample3.rb2 \
+ sample1.tst sample2.tst sample3.tst
+
+
+distclean: clean
+ #rm -f manual.ps manual.html manual.pdf
+
+DISTNAME=bzip2-1.0.6
+dist: check manual
+ rm -f $(DISTNAME)
+ ln -s -f . $(DISTNAME)
+ tar cvf $(DISTNAME).tar \
+ $(DISTNAME)/blocksort.c \
+ $(DISTNAME)/huffman.c \
+ $(DISTNAME)/crctable.c \
+ $(DISTNAME)/randtable.c \
+ $(DISTNAME)/compress.c \
+ $(DISTNAME)/decompress.c \
+ $(DISTNAME)/bzlib.c \
+ $(DISTNAME)/bzip2.c \
+ $(DISTNAME)/bzip2recover.c \
+ $(DISTNAME)/bzlib.h \
+ $(DISTNAME)/bzlib_private.h \
+ $(DISTNAME)/Makefile \
+ $(DISTNAME)/LICENSE \
+ $(DISTNAME)/bzip2.1 \
+ $(DISTNAME)/bzip2.1.preformatted \
+ $(DISTNAME)/bzip2.txt \
+ $(DISTNAME)/words0 \
+ $(DISTNAME)/words1 \
+ $(DISTNAME)/words2 \
+ $(DISTNAME)/words3 \
+ $(DISTNAME)/sample1.ref \
+ $(DISTNAME)/sample2.ref \
+ $(DISTNAME)/sample3.ref \
+ $(DISTNAME)/sample1.bz2 \
+ $(DISTNAME)/sample2.bz2 \
+ $(DISTNAME)/sample3.bz2 \
+ $(DISTNAME)/dlltest.c \
+ $(DISTNAME)/manual.html \
+ $(DISTNAME)/manual.pdf \
+ $(DISTNAME)/manual.ps \
+ $(DISTNAME)/README \
+ $(DISTNAME)/README.COMPILATION.PROBLEMS \
+ $(DISTNAME)/README.XML.STUFF \
+ $(DISTNAME)/CHANGES \
+ $(DISTNAME)/libbz2.def \
+ $(DISTNAME)/libbz2.dsp \
+ $(DISTNAME)/dlltest.dsp \
+ $(DISTNAME)/makefile.msc \
+ $(DISTNAME)/unzcrash.c \
+ $(DISTNAME)/spewG.c \
+ $(DISTNAME)/mk251.c \
+ $(DISTNAME)/bzdiff \
+ $(DISTNAME)/bzdiff.1 \
+ $(DISTNAME)/bzmore \
+ $(DISTNAME)/bzmore.1 \
+ $(DISTNAME)/bzexe \
+ $(DISTNAME)/bzexe.1 \
+ $(DISTNAME)/bzgrep \
+ $(DISTNAME)/bzgrep.1 \
+ $(DISTNAME)/Makefile-libbz2_so \
+ $(DISTNAME)/bz-common.xsl \
+ $(DISTNAME)/bz-fo.xsl \
+ $(DISTNAME)/bz-html.xsl \
+ $(DISTNAME)/bzip.css \
+ $(DISTNAME)/entities.xml \
+ $(DISTNAME)/manual.xml \
+ $(DISTNAME)/format.pl \
+ $(DISTNAME)/xmlproc.sh
+ gzip -v $(DISTNAME).tar
+
+# For rebuilding the manual from sources on my SuSE 9.1 box
+
+MANUAL_SRCS= bz-common.xsl bz-fo.xsl bz-html.xsl bzip.css \
+ entities.xml manual.xml
+
+manual: manual.html manual.ps manual.pdf
+
+manual.ps: $(MANUAL_SRCS)
+ ./xmlproc.sh -ps manual.xml
+
+manual.pdf: $(MANUAL_SRCS)
+ ./xmlproc.sh -pdf manual.xml
+
+manual.html: $(MANUAL_SRCS)
+ ./xmlproc.sh -html manual.xml
--- /dev/null
+
+/*-------------------------------------------------------------*/
+/*--- Block sorting machinery ---*/
+/*--- blocksort.c ---*/
+/*-------------------------------------------------------------*/
+
+/* ------------------------------------------------------------------
+ This file is part of bzip2/libbzip2, a program and library for
+ lossless, block-sorting data compression.
+
+ bzip2/libbzip2 version 1.0.6 of 6 September 2010
+ Copyright (C) 1996-2010 Julian Seward <jseward@bzip.org>
+
+ Please read the WARNING, DISCLAIMER and PATENTS sections in the
+ README file.
+
+ This program is released under the terms of the license contained
+ in the file LICENSE.
+ ------------------------------------------------------------------ */
+
+
+#include "bzlib_private.h"
+
+/*---------------------------------------------*/
+/*--- Fallback O(N log(N)^2) sorting ---*/
+/*--- algorithm, for repetitive blocks ---*/
+/*---------------------------------------------*/
+
+/*---------------------------------------------*/
+static
+__inline__
+void fallbackSimpleSort ( UInt32* fmap,
+ UInt32* eclass,
+ Int32 lo,
+ Int32 hi )
+{
+ Int32 i, j, tmp;
+ UInt32 ec_tmp;
+
+ if (lo == hi) return;
+
+ if (hi - lo > 3) {
+ for ( i = hi-4; i >= lo; i-- ) {
+ tmp = fmap[i];
+ ec_tmp = eclass[tmp];
+ for ( j = i+4; j <= hi && ec_tmp > eclass[fmap[j]]; j += 4 )
+ fmap[j-4] = fmap[j];
+ fmap[j-4] = tmp;
+ }
+ }
+
+ for ( i = hi-1; i >= lo; i-- ) {
+ tmp = fmap[i];
+ ec_tmp = eclass[tmp];
+ for ( j = i+1; j <= hi && ec_tmp > eclass[fmap[j]]; j++ )
+ fmap[j-1] = fmap[j];
+ fmap[j-1] = tmp;
+ }
+}
+
+
+/*---------------------------------------------*/
+#define fswap(zz1, zz2) \
+ { Int32 zztmp = zz1; zz1 = zz2; zz2 = zztmp; }
+
+#define fvswap(zzp1, zzp2, zzn) \
+{ \
+ Int32 yyp1 = (zzp1); \
+ Int32 yyp2 = (zzp2); \
+ Int32 yyn = (zzn); \
+ while (yyn > 0) { \
+ fswap(fmap[yyp1], fmap[yyp2]); \
+ yyp1++; yyp2++; yyn--; \
+ } \
+}
+
+
+#define fmin(a,b) ((a) < (b)) ? (a) : (b)
+
+#define fpush(lz,hz) { stackLo[sp] = lz; \
+ stackHi[sp] = hz; \
+ sp++; }
+
+#define fpop(lz,hz) { sp--; \
+ lz = stackLo[sp]; \
+ hz = stackHi[sp]; }
+
+#define FALLBACK_QSORT_SMALL_THRESH 10
+#define FALLBACK_QSORT_STACK_SIZE 100
+
+
+static
+void fallbackQSort3 ( UInt32* fmap,
+ UInt32* eclass,
+ Int32 loSt,
+ Int32 hiSt )
+{
+ Int32 unLo, unHi, ltLo, gtHi, n, m;
+ Int32 sp, lo, hi;
+ UInt32 med, r, r3;
+ Int32 stackLo[FALLBACK_QSORT_STACK_SIZE];
+ Int32 stackHi[FALLBACK_QSORT_STACK_SIZE];
+
+ r = 0;
+
+ sp = 0;
+ fpush ( loSt, hiSt );
+
+ while (sp > 0) {
+
+ AssertH ( sp < FALLBACK_QSORT_STACK_SIZE - 1, 1004 );
+
+ fpop ( lo, hi );
+ if (hi - lo < FALLBACK_QSORT_SMALL_THRESH) {
+ fallbackSimpleSort ( fmap, eclass, lo, hi );
+ continue;
+ }
+
+ /* Random partitioning. Median of 3 sometimes fails to
+ avoid bad cases. Median of 9 seems to help but
+ looks rather expensive. This too seems to work but
+ is cheaper. Guidance for the magic constants
+ 7621 and 32768 is taken from Sedgewick's algorithms
+ book, chapter 35.
+ */
+ r = ((r * 7621) + 1) % 32768;
+ r3 = r % 3;
+ if (r3 == 0) med = eclass[fmap[lo]]; else
+ if (r3 == 1) med = eclass[fmap[(lo+hi)>>1]]; else
+ med = eclass[fmap[hi]];
+
+ unLo = ltLo = lo;
+ unHi = gtHi = hi;
+
+ while (1) {
+ while (1) {
+ if (unLo > unHi) break;
+ n = (Int32)eclass[fmap[unLo]] - (Int32)med;
+ if (n == 0) {
+ fswap(fmap[unLo], fmap[ltLo]);
+ ltLo++; unLo++;
+ continue;
+ };
+ if (n > 0) break;
+ unLo++;
+ }
+ while (1) {
+ if (unLo > unHi) break;
+ n = (Int32)eclass[fmap[unHi]] - (Int32)med;
+ if (n == 0) {
+ fswap(fmap[unHi], fmap[gtHi]);
+ gtHi--; unHi--;
+ continue;
+ };
+ if (n < 0) break;
+ unHi--;
+ }
+ if (unLo > unHi) break;
+ fswap(fmap[unLo], fmap[unHi]); unLo++; unHi--;
+ }
+
+ AssertD ( unHi == unLo-1, "fallbackQSort3(2)" );
+
+ if (gtHi < ltLo) continue;
+
+ n = fmin(ltLo-lo, unLo-ltLo); fvswap(lo, unLo-n, n);
+ m = fmin(hi-gtHi, gtHi-unHi); fvswap(unLo, hi-m+1, m);
+
+ n = lo + unLo - ltLo - 1;
+ m = hi - (gtHi - unHi) + 1;
+
+ if (n - lo > hi - m) {
+ fpush ( lo, n );
+ fpush ( m, hi );
+ } else {
+ fpush ( m, hi );
+ fpush ( lo, n );
+ }
+ }
+}
+
+#undef fmin
+#undef fpush
+#undef fpop
+#undef fswap
+#undef fvswap
+#undef FALLBACK_QSORT_SMALL_THRESH
+#undef FALLBACK_QSORT_STACK_SIZE
+
+
+/*---------------------------------------------*/
+/* Pre:
+ nblock > 0
+ eclass exists for [0 .. nblock-1]
+ ((UChar*)eclass) [0 .. nblock-1] holds block
+ ptr exists for [0 .. nblock-1]
+
+ Post:
+ ((UChar*)eclass) [0 .. nblock-1] holds block
+ All other areas of eclass destroyed
+ fmap [0 .. nblock-1] holds sorted order
+ bhtab [ 0 .. 2+(nblock/32) ] destroyed
+*/
+
+#define SET_BH(zz) bhtab[(zz) >> 5] |= (1 << ((zz) & 31))
+#define CLEAR_BH(zz) bhtab[(zz) >> 5] &= ~(1 << ((zz) & 31))
+#define ISSET_BH(zz) (bhtab[(zz) >> 5] & (1 << ((zz) & 31)))
+#define WORD_BH(zz) bhtab[(zz) >> 5]
+#define UNALIGNED_BH(zz) ((zz) & 0x01f)
+
+static
+void fallbackSort ( UInt32* fmap,
+ UInt32* eclass,
+ UInt32* bhtab,
+ Int32 nblock,
+ Int32 verb )
+{
+ Int32 ftab[257];
+ Int32 ftabCopy[256];
+ Int32 H, i, j, k, l, r, cc, cc1;
+ Int32 nNotDone;
+ Int32 nBhtab;
+ UChar* eclass8 = (UChar*)eclass;
+
+ /*--
+ Initial 1-char radix sort to generate
+ initial fmap and initial BH bits.
+ --*/
+ if (verb >= 4)
+ VPrintf0 ( " bucket sorting ...\n" );
+ for (i = 0; i < 257; i++) ftab[i] = 0;
+ for (i = 0; i < nblock; i++) ftab[eclass8[i]]++;
+ for (i = 0; i < 256; i++) ftabCopy[i] = ftab[i];
+ for (i = 1; i < 257; i++) ftab[i] += ftab[i-1];
+
+ for (i = 0; i < nblock; i++) {
+ j = eclass8[i];
+ k = ftab[j] - 1;
+ ftab[j] = k;
+ fmap[k] = i;
+ }
+
+ nBhtab = 2 + (nblock / 32);
+ for (i = 0; i < nBhtab; i++) bhtab[i] = 0;
+ for (i = 0; i < 256; i++) SET_BH(ftab[i]);
+
+ /*--
+ Inductively refine the buckets. Kind-of an
+ "exponential radix sort" (!), inspired by the
+ Manber-Myers suffix array construction algorithm.
+ --*/
+
+ /*-- set sentinel bits for block-end detection --*/
+ for (i = 0; i < 32; i++) {
+ SET_BH(nblock + 2*i);
+ CLEAR_BH(nblock + 2*i + 1);
+ }
+
+ /*-- the log(N) loop --*/
+ H = 1;
+ while (1) {
+
+ if (verb >= 4)
+ VPrintf1 ( " depth %6d has ", H );
+
+ j = 0;
+ for (i = 0; i < nblock; i++) {
+ if (ISSET_BH(i)) j = i;
+ k = fmap[i] - H; if (k < 0) k += nblock;
+ eclass[k] = j;
+ }
+
+ nNotDone = 0;
+ r = -1;
+ while (1) {
+
+ /*-- find the next non-singleton bucket --*/
+ k = r + 1;
+ while (ISSET_BH(k) && UNALIGNED_BH(k)) k++;
+ if (ISSET_BH(k)) {
+ while (WORD_BH(k) == 0xffffffff) k += 32;
+ while (ISSET_BH(k)) k++;
+ }
+ l = k - 1;
+ if (l >= nblock) break;
+ while (!ISSET_BH(k) && UNALIGNED_BH(k)) k++;
+ if (!ISSET_BH(k)) {
+ while (WORD_BH(k) == 0x00000000) k += 32;
+ while (!ISSET_BH(k)) k++;
+ }
+ r = k - 1;
+ if (r >= nblock) break;
+
+ /*-- now [l, r] bracket current bucket --*/
+ if (r > l) {
+ nNotDone += (r - l + 1);
+ fallbackQSort3 ( fmap, eclass, l, r );
+
+ /*-- scan bucket and generate header bits-- */
+ cc = -1;
+ for (i = l; i <= r; i++) {
+ cc1 = eclass[fmap[i]];
+ if (cc != cc1) { SET_BH(i); cc = cc1; };
+ }
+ }
+ }
+
+ if (verb >= 4)
+ VPrintf1 ( "%6d unresolved strings\n", nNotDone );
+
+ H *= 2;
+ if (H > nblock || nNotDone == 0) break;
+ }
+
+ /*--
+ Reconstruct the original block in
+ eclass8 [0 .. nblock-1], since the
+ previous phase destroyed it.
+ --*/
+ if (verb >= 4)
+ VPrintf0 ( " reconstructing block ...\n" );
+ j = 0;
+ for (i = 0; i < nblock; i++) {
+ while (ftabCopy[j] == 0) j++;
+ ftabCopy[j]--;
+ eclass8[fmap[i]] = (UChar)j;
+ }
+ AssertH ( j < 256, 1005 );
+}
+
+#undef SET_BH
+#undef CLEAR_BH
+#undef ISSET_BH
+#undef WORD_BH
+#undef UNALIGNED_BH
+
+
+/*---------------------------------------------*/
+/*--- The main, O(N^2 log(N)) sorting ---*/
+/*--- algorithm. Faster for "normal" ---*/
+/*--- non-repetitive blocks. ---*/
+/*---------------------------------------------*/
+
+/*---------------------------------------------*/
+static
+__inline__
+Bool mainGtU ( UInt32 i1,
+ UInt32 i2,
+ UChar* block,
+ UInt16* quadrant,
+ UInt32 nblock,
+ Int32* budget )
+{
+ Int32 k;
+ UChar c1, c2;
+ UInt16 s1, s2;
+
+ AssertD ( i1 != i2, "mainGtU" );
+ /* 1 */
+ c1 = block[i1]; c2 = block[i2];
+ if (c1 != c2) return (c1 > c2);
+ i1++; i2++;
+ /* 2 */
+ c1 = block[i1]; c2 = block[i2];
+ if (c1 != c2) return (c1 > c2);
+ i1++; i2++;
+ /* 3 */
+ c1 = block[i1]; c2 = block[i2];
+ if (c1 != c2) return (c1 > c2);
+ i1++; i2++;
+ /* 4 */
+ c1 = block[i1]; c2 = block[i2];
+ if (c1 != c2) return (c1 > c2);
+ i1++; i2++;
+ /* 5 */
+ c1 = block[i1]; c2 = block[i2];
+ if (c1 != c2) return (c1 > c2);
+ i1++; i2++;
+ /* 6 */
+ c1 = block[i1]; c2 = block[i2];
+ if (c1 != c2) return (c1 > c2);
+ i1++; i2++;
+ /* 7 */
+ c1 = block[i1]; c2 = block[i2];
+ if (c1 != c2) return (c1 > c2);
+ i1++; i2++;
+ /* 8 */
+ c1 = block[i1]; c2 = block[i2];
+ if (c1 != c2) return (c1 > c2);
+ i1++; i2++;
+ /* 9 */
+ c1 = block[i1]; c2 = block[i2];
+ if (c1 != c2) return (c1 > c2);
+ i1++; i2++;
+ /* 10 */
+ c1 = block[i1]; c2 = block[i2];
+ if (c1 != c2) return (c1 > c2);
+ i1++; i2++;
+ /* 11 */
+ c1 = block[i1]; c2 = block[i2];
+ if (c1 != c2) return (c1 > c2);
+ i1++; i2++;
+ /* 12 */
+ c1 = block[i1]; c2 = block[i2];
+ if (c1 != c2) return (c1 > c2);
+ i1++; i2++;
+
+ k = nblock + 8;
+
+ do {
+ /* 1 */
+ c1 = block[i1]; c2 = block[i2];
+ if (c1 != c2) return (c1 > c2);
+ s1 = quadrant[i1]; s2 = quadrant[i2];
+ if (s1 != s2) return (s1 > s2);
+ i1++; i2++;
+ /* 2 */
+ c1 = block[i1]; c2 = block[i2];
+ if (c1 != c2) return (c1 > c2);
+ s1 = quadrant[i1]; s2 = quadrant[i2];
+ if (s1 != s2) return (s1 > s2);
+ i1++; i2++;
+ /* 3 */
+ c1 = block[i1]; c2 = block[i2];
+ if (c1 != c2) return (c1 > c2);
+ s1 = quadrant[i1]; s2 = quadrant[i2];
+ if (s1 != s2) return (s1 > s2);
+ i1++; i2++;
+ /* 4 */
+ c1 = block[i1]; c2 = block[i2];
+ if (c1 != c2) return (c1 > c2);
+ s1 = quadrant[i1]; s2 = quadrant[i2];
+ if (s1 != s2) return (s1 > s2);
+ i1++; i2++;
+ /* 5 */
+ c1 = block[i1]; c2 = block[i2];
+ if (c1 != c2) return (c1 > c2);
+ s1 = quadrant[i1]; s2 = quadrant[i2];
+ if (s1 != s2) return (s1 > s2);
+ i1++; i2++;
+ /* 6 */
+ c1 = block[i1]; c2 = block[i2];
+ if (c1 != c2) return (c1 > c2);
+ s1 = quadrant[i1]; s2 = quadrant[i2];
+ if (s1 != s2) return (s1 > s2);
+ i1++; i2++;
+ /* 7 */
+ c1 = block[i1]; c2 = block[i2];
+ if (c1 != c2) return (c1 > c2);
+ s1 = quadrant[i1]; s2 = quadrant[i2];
+ if (s1 != s2) return (s1 > s2);
+ i1++; i2++;
+ /* 8 */
+ c1 = block[i1]; c2 = block[i2];
+ if (c1 != c2) return (c1 > c2);
+ s1 = quadrant[i1]; s2 = quadrant[i2];
+ if (s1 != s2) return (s1 > s2);
+ i1++; i2++;
+
+ if (i1 >= nblock) i1 -= nblock;
+ if (i2 >= nblock) i2 -= nblock;
+
+ k -= 8;
+ (*budget)--;
+ }
+ while (k >= 0);
+
+ return False;
+}
+
+
+/*---------------------------------------------*/
+/*--
+ Knuth's increments seem to work better
+ than Incerpi-Sedgewick here. Possibly
+ because the number of elems to sort is
+ usually small, typically <= 20.
+--*/
+static
+Int32 incs[14] = { 1, 4, 13, 40, 121, 364, 1093, 3280,
+ 9841, 29524, 88573, 265720,
+ 797161, 2391484 };
+
+static
+void mainSimpleSort ( UInt32* ptr,
+ UChar* block,
+ UInt16* quadrant,
+ Int32 nblock,
+ Int32 lo,
+ Int32 hi,
+ Int32 d,
+ Int32* budget )
+{
+ Int32 i, j, h, bigN, hp;
+ UInt32 v;
+
+ bigN = hi - lo + 1;
+ if (bigN < 2) return;
+
+ hp = 0;
+ while (incs[hp] < bigN) hp++;
+ hp--;
+
+ for (; hp >= 0; hp--) {
+ h = incs[hp];
+
+ i = lo + h;
+ while (True) {
+
+ /*-- copy 1 --*/
+ if (i > hi) break;
+ v = ptr[i];
+ j = i;
+ while ( mainGtU (
+ ptr[j-h]+d, v+d, block, quadrant, nblock, budget
+ ) ) {
+ ptr[j] = ptr[j-h];
+ j = j - h;
+ if (j <= (lo + h - 1)) break;
+ }
+ ptr[j] = v;
+ i++;
+
+ /*-- copy 2 --*/
+ if (i > hi) break;
+ v = ptr[i];
+ j = i;
+ while ( mainGtU (
+ ptr[j-h]+d, v+d, block, quadrant, nblock, budget
+ ) ) {
+ ptr[j] = ptr[j-h];
+ j = j - h;
+ if (j <= (lo + h - 1)) break;
+ }
+ ptr[j] = v;
+ i++;
+
+ /*-- copy 3 --*/
+ if (i > hi) break;
+ v = ptr[i];
+ j = i;
+ while ( mainGtU (
+ ptr[j-h]+d, v+d, block, quadrant, nblock, budget
+ ) ) {
+ ptr[j] = ptr[j-h];
+ j = j - h;
+ if (j <= (lo + h - 1)) break;
+ }
+ ptr[j] = v;
+ i++;
+
+ if (*budget < 0) return;
+ }
+ }
+}
+
+
+/*---------------------------------------------*/
+/*--
+ The following is an implementation of
+ an elegant 3-way quicksort for strings,
+ described in a paper "Fast Algorithms for
+ Sorting and Searching Strings", by Robert
+ Sedgewick and Jon L. Bentley.
+--*/
+
+#define mswap(zz1, zz2) \
+ { Int32 zztmp = zz1; zz1 = zz2; zz2 = zztmp; }
+
+#define mvswap(zzp1, zzp2, zzn) \
+{ \
+ Int32 yyp1 = (zzp1); \
+ Int32 yyp2 = (zzp2); \
+ Int32 yyn = (zzn); \
+ while (yyn > 0) { \
+ mswap(ptr[yyp1], ptr[yyp2]); \
+ yyp1++; yyp2++; yyn--; \
+ } \
+}
+
+static
+__inline__
+UChar mmed3 ( UChar a, UChar b, UChar c )
+{
+ UChar t;
+ if (a > b) { t = a; a = b; b = t; };
+ if (b > c) {
+ b = c;
+ if (a > b) b = a;
+ }
+ return b;
+}
+
+#define mmin(a,b) ((a) < (b)) ? (a) : (b)
+
+#define mpush(lz,hz,dz) { stackLo[sp] = lz; \
+ stackHi[sp] = hz; \
+ stackD [sp] = dz; \
+ sp++; }
+
+#define mpop(lz,hz,dz) { sp--; \
+ lz = stackLo[sp]; \
+ hz = stackHi[sp]; \
+ dz = stackD [sp]; }
+
+
+#define mnextsize(az) (nextHi[az]-nextLo[az])
+
+#define mnextswap(az,bz) \
+ { Int32 tz; \
+ tz = nextLo[az]; nextLo[az] = nextLo[bz]; nextLo[bz] = tz; \
+ tz = nextHi[az]; nextHi[az] = nextHi[bz]; nextHi[bz] = tz; \
+ tz = nextD [az]; nextD [az] = nextD [bz]; nextD [bz] = tz; }
+
+
+#define MAIN_QSORT_SMALL_THRESH 20
+#define MAIN_QSORT_DEPTH_THRESH (BZ_N_RADIX + BZ_N_QSORT)
+#define MAIN_QSORT_STACK_SIZE 100
+
+static
+void mainQSort3 ( UInt32* ptr,
+ UChar* block,
+ UInt16* quadrant,
+ Int32 nblock,
+ Int32 loSt,
+ Int32 hiSt,
+ Int32 dSt,
+ Int32* budget )
+{
+ Int32 unLo, unHi, ltLo, gtHi, n, m, med;
+ Int32 sp, lo, hi, d;
+
+ Int32 stackLo[MAIN_QSORT_STACK_SIZE];
+ Int32 stackHi[MAIN_QSORT_STACK_SIZE];
+ Int32 stackD [MAIN_QSORT_STACK_SIZE];
+
+ Int32 nextLo[3];
+ Int32 nextHi[3];
+ Int32 nextD [3];
+
+ sp = 0;
+ mpush ( loSt, hiSt, dSt );
+
+ while (sp > 0) {
+
+ AssertH ( sp < MAIN_QSORT_STACK_SIZE - 2, 1001 );
+
+ mpop ( lo, hi, d );
+ if (hi - lo < MAIN_QSORT_SMALL_THRESH ||
+ d > MAIN_QSORT_DEPTH_THRESH) {
+ mainSimpleSort ( ptr, block, quadrant, nblock, lo, hi, d, budget );
+ if (*budget < 0) return;
+ continue;
+ }
+
+ med = (Int32)
+ mmed3 ( block[ptr[ lo ]+d],
+ block[ptr[ hi ]+d],
+ block[ptr[ (lo+hi)>>1 ]+d] );
+
+ unLo = ltLo = lo;
+ unHi = gtHi = hi;
+
+ while (True) {
+ while (True) {
+ if (unLo > unHi) break;
+ n = ((Int32)block[ptr[unLo]+d]) - med;
+ if (n == 0) {
+ mswap(ptr[unLo], ptr[ltLo]);
+ ltLo++; unLo++; continue;
+ };
+ if (n > 0) break;
+ unLo++;
+ }
+ while (True) {
+ if (unLo > unHi) break;
+ n = ((Int32)block[ptr[unHi]+d]) - med;
+ if (n == 0) {
+ mswap(ptr[unHi], ptr[gtHi]);
+ gtHi--; unHi--; continue;
+ };
+ if (n < 0) break;
+ unHi--;
+ }
+ if (unLo > unHi) break;
+ mswap(ptr[unLo], ptr[unHi]); unLo++; unHi--;
+ }
+
+ AssertD ( unHi == unLo-1, "mainQSort3(2)" );
+
+ if (gtHi < ltLo) {
+ mpush(lo, hi, d+1 );
+ continue;
+ }
+
+ n = mmin(ltLo-lo, unLo-ltLo); mvswap(lo, unLo-n, n);
+ m = mmin(hi-gtHi, gtHi-unHi); mvswap(unLo, hi-m+1, m);
+
+ n = lo + unLo - ltLo - 1;
+ m = hi - (gtHi - unHi) + 1;
+
+ nextLo[0] = lo; nextHi[0] = n; nextD[0] = d;
+ nextLo[1] = m; nextHi[1] = hi; nextD[1] = d;
+ nextLo[2] = n+1; nextHi[2] = m-1; nextD[2] = d+1;
+
+ if (mnextsize(0) < mnextsize(1)) mnextswap(0,1);
+ if (mnextsize(1) < mnextsize(2)) mnextswap(1,2);
+ if (mnextsize(0) < mnextsize(1)) mnextswap(0,1);
+
+ AssertD (mnextsize(0) >= mnextsize(1), "mainQSort3(8)" );
+ AssertD (mnextsize(1) >= mnextsize(2), "mainQSort3(9)" );
+
+ mpush (nextLo[0], nextHi[0], nextD[0]);
+ mpush (nextLo[1], nextHi[1], nextD[1]);
+ mpush (nextLo[2], nextHi[2], nextD[2]);
+ }
+}
+
+#undef mswap
+#undef mvswap
+#undef mpush
+#undef mpop
+#undef mmin
+#undef mnextsize
+#undef mnextswap
+#undef MAIN_QSORT_SMALL_THRESH
+#undef MAIN_QSORT_DEPTH_THRESH
+#undef MAIN_QSORT_STACK_SIZE
+
+
+/*---------------------------------------------*/
+/* Pre:
+ nblock > N_OVERSHOOT
+ block32 exists for [0 .. nblock-1 +N_OVERSHOOT]
+ ((UChar*)block32) [0 .. nblock-1] holds block
+ ptr exists for [0 .. nblock-1]
+
+ Post:
+ ((UChar*)block32) [0 .. nblock-1] holds block
+ All other areas of block32 destroyed
+ ftab [0 .. 65536 ] destroyed
+ ptr [0 .. nblock-1] holds sorted order
+ if (*budget < 0), sorting was abandoned
+*/
+
+#define BIGFREQ(b) (ftab[((b)+1) << 8] - ftab[(b) << 8])
+#define SETMASK (1 << 21)
+#define CLEARMASK (~(SETMASK))
+
+static
+void mainSort ( UInt32* ptr,
+ UChar* block,
+ UInt16* quadrant,
+ UInt32* ftab,
+ Int32 nblock,
+ Int32 verb,
+ Int32* budget )
+{
+ Int32 i, j, k, ss, sb;
+ Int32 runningOrder[256];
+ Bool bigDone[256];
+ Int32 copyStart[256];
+ Int32 copyEnd [256];
+ UChar c1;
+ Int32 numQSorted;
+ UInt16 s;
+ if (verb >= 4) VPrintf0 ( " main sort initialise ...\n" );
+
+ /*-- set up the 2-byte frequency table --*/
+ for (i = 65536; i >= 0; i--) ftab[i] = 0;
+
+ j = block[0] << 8;
+ i = nblock-1;
+ for (; i >= 3; i -= 4) {
+ quadrant[i] = 0;
+ j = (j >> 8) | ( ((UInt16)block[i]) << 8);
+ ftab[j]++;
+ quadrant[i-1] = 0;
+ j = (j >> 8) | ( ((UInt16)block[i-1]) << 8);
+ ftab[j]++;
+ quadrant[i-2] = 0;
+ j = (j >> 8) | ( ((UInt16)block[i-2]) << 8);
+ ftab[j]++;
+ quadrant[i-3] = 0;
+ j = (j >> 8) | ( ((UInt16)block[i-3]) << 8);
+ ftab[j]++;
+ }
+ for (; i >= 0; i--) {
+ quadrant[i] = 0;
+ j = (j >> 8) | ( ((UInt16)block[i]) << 8);
+ ftab[j]++;
+ }
+
+ /*-- (emphasises close relationship of block & quadrant) --*/
+ for (i = 0; i < BZ_N_OVERSHOOT; i++) {
+ block [nblock+i] = block[i];
+ quadrant[nblock+i] = 0;
+ }
+
+ if (verb >= 4) VPrintf0 ( " bucket sorting ...\n" );
+
+ /*-- Complete the initial radix sort --*/
+ for (i = 1; i <= 65536; i++) ftab[i] += ftab[i-1];
+
+ s = block[0] << 8;
+ i = nblock-1;
+ for (; i >= 3; i -= 4) {
+ s = (s >> 8) | (block[i] << 8);
+ j = ftab[s] -1;
+ ftab[s] = j;
+ ptr[j] = i;
+ s = (s >> 8) | (block[i-1] << 8);
+ j = ftab[s] -1;
+ ftab[s] = j;
+ ptr[j] = i-1;
+ s = (s >> 8) | (block[i-2] << 8);
+ j = ftab[s] -1;
+ ftab[s] = j;
+ ptr[j] = i-2;
+ s = (s >> 8) | (block[i-3] << 8);
+ j = ftab[s] -1;
+ ftab[s] = j;
+ ptr[j] = i-3;
+ }
+ for (; i >= 0; i--) {
+ s = (s >> 8) | (block[i] << 8);
+ j = ftab[s] -1;
+ ftab[s] = j;
+ ptr[j] = i;
+ }
+
+ /*--
+ Now ftab contains the first loc of every small bucket.
+ Calculate the running order, from smallest to largest
+ big bucket.
+ --*/
+ for (i = 0; i <= 255; i++) {
+ bigDone [i] = False;
+ runningOrder[i] = i;
+ }
+
+ {
+ Int32 vv;
+ Int32 h = 1;
+ do h = 3 * h + 1; while (h <= 256);
+ do {
+ h = h / 3;
+ for (i = h; i <= 255; i++) {
+ vv = runningOrder[i];
+ j = i;
+ while ( BIGFREQ(runningOrder[j-h]) > BIGFREQ(vv) ) {
+ runningOrder[j] = runningOrder[j-h];
+ j = j - h;
+ if (j <= (h - 1)) goto zero;
+ }
+ zero:
+ runningOrder[j] = vv;
+ }
+ } while (h != 1);
+ }
+
+ /*--
+ The main sorting loop.
+ --*/
+
+ numQSorted = 0;
+
+ for (i = 0; i <= 255; i++) {
+
+ /*--
+ Process big buckets, starting with the least full.
+ Basically this is a 3-step process in which we call
+ mainQSort3 to sort the small buckets [ss, j], but
+ also make a big effort to avoid the calls if we can.
+ --*/
+ ss = runningOrder[i];
+
+ /*--
+ Step 1:
+ Complete the big bucket [ss] by quicksorting
+ any unsorted small buckets [ss, j], for j != ss.
+ Hopefully previous pointer-scanning phases have already
+ completed many of the small buckets [ss, j], so
+ we don't have to sort them at all.
+ --*/
+ for (j = 0; j <= 255; j++) {
+ if (j != ss) {
+ sb = (ss << 8) + j;
+ if ( ! (ftab[sb] & SETMASK) ) {
+ Int32 lo = ftab[sb] & CLEARMASK;
+ Int32 hi = (ftab[sb+1] & CLEARMASK) - 1;
+ if (hi > lo) {
+ if (verb >= 4)
+ VPrintf4 ( " qsort [0x%x, 0x%x] "
+ "done %d this %d\n",
+ ss, j, numQSorted, hi - lo + 1 );
+ mainQSort3 (
+ ptr, block, quadrant, nblock,
+ lo, hi, BZ_N_RADIX, budget
+ );
+ numQSorted += (hi - lo + 1);
+ if (*budget < 0) return;
+ }
+ }
+ ftab[sb] |= SETMASK;
+ }
+ }
+
+ AssertH ( !bigDone[ss], 1006 );
+
+ /*--
+ Step 2:
+ Now scan this big bucket [ss] so as to synthesise the
+ sorted order for small buckets [t, ss] for all t,
+ including, magically, the bucket [ss,ss] too.
+ This will avoid doing Real Work in subsequent Step 1's.
+ --*/
+ {
+ for (j = 0; j <= 255; j++) {
+ copyStart[j] = ftab[(j << 8) + ss] & CLEARMASK;
+ copyEnd [j] = (ftab[(j << 8) + ss + 1] & CLEARMASK) - 1;
+ }
+ for (j = ftab[ss << 8] & CLEARMASK; j < copyStart[ss]; j++) {
+ k = ptr[j]-1; if (k < 0) k += nblock;
+ c1 = block[k];
+ if (!bigDone[c1])
+ ptr[ copyStart[c1]++ ] = k;
+ }
+ for (j = (ftab[(ss+1) << 8] & CLEARMASK) - 1; j > copyEnd[ss]; j--) {
+ k = ptr[j]-1; if (k < 0) k += nblock;
+ c1 = block[k];
+ if (!bigDone[c1])
+ ptr[ copyEnd[c1]-- ] = k;
+ }
+ }
+
+ AssertH ( (copyStart[ss]-1 == copyEnd[ss])
+ ||
+ /* Extremely rare case missing in bzip2-1.0.0 and 1.0.1.
+ Necessity for this case is demonstrated by compressing
+ a sequence of approximately 48.5 million of character
+ 251; 1.0.0/1.0.1 will then die here. */
+ (copyStart[ss] == 0 && copyEnd[ss] == nblock-1),
+ 1007 )
+
+ for (j = 0; j <= 255; j++) ftab[(j << 8) + ss] |= SETMASK;
+
+ /*--
+ Step 3:
+ The [ss] big bucket is now done. Record this fact,
+ and update the quadrant descriptors. Remember to
+ update quadrants in the overshoot area too, if
+ necessary. The "if (i < 255)" test merely skips
+ this updating for the last bucket processed, since
+ updating for the last bucket is pointless.
+
+ The quadrant array provides a way to incrementally
+ cache sort orderings, as they appear, so as to
+ make subsequent comparisons in fullGtU() complete
+ faster. For repetitive blocks this makes a big
+ difference (but not big enough to be able to avoid
+ the fallback sorting mechanism, exponential radix sort).
+
+ The precise meaning is: at all times:
+
+ for 0 <= i < nblock and 0 <= j <= nblock
+
+ if block[i] != block[j],
+
+ then the relative values of quadrant[i] and
+ quadrant[j] are meaningless.
+
+ else {
+ if quadrant[i] < quadrant[j]
+ then the string starting at i lexicographically
+ precedes the string starting at j
+
+ else if quadrant[i] > quadrant[j]
+ then the string starting at j lexicographically
+ precedes the string starting at i
+
+ else
+ the relative ordering of the strings starting
+ at i and j has not yet been determined.
+ }
+ --*/
+ bigDone[ss] = True;
+
+ if (i < 255) {
+ Int32 bbStart = ftab[ss << 8] & CLEARMASK;
+ Int32 bbSize = (ftab[(ss+1) << 8] & CLEARMASK) - bbStart;
+ Int32 shifts = 0;
+
+ while ((bbSize >> shifts) > 65534) shifts++;
+
+ for (j = bbSize-1; j >= 0; j--) {
+ Int32 a2update = ptr[bbStart + j];
+ UInt16 qVal = (UInt16)(j >> shifts);
+ quadrant[a2update] = qVal;
+ if (a2update < BZ_N_OVERSHOOT)
+ quadrant[a2update + nblock] = qVal;
+ }
+ AssertH ( ((bbSize-1) >> shifts) <= 65535, 1002 );
+ }
+
+ }
+
+ if (verb >= 4)
+ VPrintf3 ( " %d pointers, %d sorted, %d scanned\n",
+ nblock, numQSorted, nblock - numQSorted );
+}
+
+#undef BIGFREQ
+#undef SETMASK
+#undef CLEARMASK
+
+
+/*---------------------------------------------*/
+/* Pre:
+ nblock > 0
+ arr2 exists for [0 .. nblock-1 +N_OVERSHOOT]
+ ((UChar*)arr2) [0 .. nblock-1] holds block
+ arr1 exists for [0 .. nblock-1]
+
+ Post:
+ ((UChar*)arr2) [0 .. nblock-1] holds block
+ All other areas of block destroyed
+ ftab [ 0 .. 65536 ] destroyed
+ arr1 [0 .. nblock-1] holds sorted order
+*/
+void BZ2_blockSort ( EState* s )
+{
+ UInt32* ptr = s->ptr;
+ UChar* block = s->block;
+ UInt32* ftab = s->ftab;
+ Int32 nblock = s->nblock;
+ Int32 verb = s->verbosity;
+ Int32 wfact = s->workFactor;
+ UInt16* quadrant;
+ Int32 budget;
+ Int32 budgetInit;
+ Int32 i;
+
+ if (nblock < 10000) {
+ fallbackSort ( s->arr1, s->arr2, ftab, nblock, verb );
+ } else {
+ /* Calculate the location for quadrant, remembering to get
+ the alignment right. Assumes that &(block[0]) is at least
+ 2-byte aligned -- this should be ok since block is really
+ the first section of arr2.
+ */
+ i = nblock+BZ_N_OVERSHOOT;
+ if (i & 1) i++;
+ quadrant = (UInt16*)(&(block[i]));
+
+ /* (wfact-1) / 3 puts the default-factor-30
+ transition point at very roughly the same place as
+ with v0.1 and v0.9.0.
+ Not that it particularly matters any more, since the
+ resulting compressed stream is now the same regardless
+ of whether or not we use the main sort or fallback sort.
+ */
+ if (wfact < 1 ) wfact = 1;
+ if (wfact > 100) wfact = 100;
+ budgetInit = nblock * ((wfact-1) / 3);
+ budget = budgetInit;
+
+ mainSort ( ptr, block, quadrant, ftab, nblock, verb, &budget );
+ if (verb >= 3)
+ VPrintf3 ( " %d work, %d block, ratio %5.2f\n",
+ budgetInit - budget,
+ nblock,
+ (float)(budgetInit - budget) /
+ (float)(nblock==0 ? 1 : nblock) );
+ if (budget < 0) {
+ if (verb >= 2)
+ VPrintf0 ( " too repetitive; using fallback"
+ " sorting algorithm\n" );
+ fallbackSort ( s->arr1, s->arr2, ftab, nblock, verb );
+ }
+ }
+
+ s->origPtr = -1;
+ for (i = 0; i < s->nblock; i++)
+ if (ptr[i] == 0)
+ { s->origPtr = i; break; };
+
+ AssertH( s->origPtr != -1, 1003 );
+}
+
+
+/*-------------------------------------------------------------*/
+/*--- end blocksort.c ---*/
+/*-------------------------------------------------------------*/
--- /dev/null
+
+/*-----------------------------------------------------------*/
+/*--- A block-sorting, lossless compressor bzip2.c ---*/
+/*-----------------------------------------------------------*/
+
+/* ------------------------------------------------------------------
+ This file is part of bzip2/libbzip2, a program and library for
+ lossless, block-sorting data compression.
+
+ bzip2/libbzip2 version 1.0.6 of 6 September 2010
+ Copyright (C) 1996-2010 Julian Seward <jseward@bzip.org>
+
+ Please read the WARNING, DISCLAIMER and PATENTS sections in the
+ README file.
+
+ This program is released under the terms of the license contained
+ in the file LICENSE.
+ ------------------------------------------------------------------ */
+
+
+/* Place a 1 beside your platform, and 0 elsewhere.
+ Generic 32-bit Unix.
+ Also works on 64-bit Unix boxes.
+ This is the default.
+*/
+#define BZ_UNIX 1
+
+/*--
+ Win32, as seen by Jacob Navia's excellent
+ port of (Chris Fraser & David Hanson)'s excellent
+ lcc compiler. Or with MS Visual C.
+ This is selected automatically if compiled by a compiler which
+ defines _WIN32, not including the Cygwin GCC.
+--*/
+#define BZ_LCCWIN32 0
+
+#if defined(_WIN32) && !defined(__CYGWIN__)
+#undef BZ_LCCWIN32
+#define BZ_LCCWIN32 1
+#undef BZ_UNIX
+#define BZ_UNIX 0
+#endif
+
+
+/*---------------------------------------------*/
+/*--
+ Some stuff for all platforms.
+--*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <signal.h>
+#include <math.h>
+#include <errno.h>
+#include <ctype.h>
+#include "bzlib.h"
+
+#define ERROR_IF_EOF(i) { if ((i) == EOF) ioError(); }
+#define ERROR_IF_NOT_ZERO(i) { if ((i) != 0) ioError(); }
+#define ERROR_IF_MINUS_ONE(i) { if ((i) == (-1)) ioError(); }
+
+
+/*---------------------------------------------*/
+/*--
+ Platform-specific stuff.
+--*/
+
+#if BZ_UNIX
+# include <fcntl.h>
+# include <sys/types.h>
+# include <utime.h>
+# include <unistd.h>
+# include <sys/stat.h>
+# include <sys/times.h>
+
+# define PATH_SEP '/'
+# define MY_LSTAT lstat
+# define MY_STAT stat
+# define MY_S_ISREG S_ISREG
+# define MY_S_ISDIR S_ISDIR
+
+# define APPEND_FILESPEC(root, name) \
+ root=snocString((root), (name))
+
+# define APPEND_FLAG(root, name) \
+ root=snocString((root), (name))
+
+# define SET_BINARY_MODE(fd) /**/
+
+# ifdef __GNUC__
+# define NORETURN __attribute__ ((noreturn))
+# else
+# define NORETURN /**/
+# endif
+
+# ifdef __DJGPP__
+# include <io.h>
+# include <fcntl.h>
+# undef MY_LSTAT
+# undef MY_STAT
+# define MY_LSTAT stat
+# define MY_STAT stat
+# undef SET_BINARY_MODE
+# define SET_BINARY_MODE(fd) \
+ do { \
+ int retVal = setmode ( fileno ( fd ), \
+ O_BINARY ); \
+ ERROR_IF_MINUS_ONE ( retVal ); \
+ } while ( 0 )
+# endif
+
+# ifdef __CYGWIN__
+# include <io.h>
+# include <fcntl.h>
+# undef SET_BINARY_MODE
+# define SET_BINARY_MODE(fd) \
+ do { \
+ int retVal = setmode ( fileno ( fd ), \
+ O_BINARY ); \
+ ERROR_IF_MINUS_ONE ( retVal ); \
+ } while ( 0 )
+# endif
+#endif /* BZ_UNIX */
+
+
+
+#if BZ_LCCWIN32
+# include <io.h>
+# include <fcntl.h>
+# include <sys\stat.h>
+
+# define NORETURN /**/
+# define PATH_SEP '\\'
+# define MY_LSTAT _stat
+# define MY_STAT _stat
+# define MY_S_ISREG(x) ((x) & _S_IFREG)
+# define MY_S_ISDIR(x) ((x) & _S_IFDIR)
+
+# define APPEND_FLAG(root, name) \
+ root=snocString((root), (name))
+
+# define APPEND_FILESPEC(root, name) \
+ root = snocString ((root), (name))
+
+# define SET_BINARY_MODE(fd) \
+ do { \
+ int retVal = setmode ( fileno ( fd ), \
+ O_BINARY ); \
+ ERROR_IF_MINUS_ONE ( retVal ); \
+ } while ( 0 )
+
+#endif /* BZ_LCCWIN32 */
+
+
+/*---------------------------------------------*/
+/*--
+ Some more stuff for all platforms :-)
+--*/
+
+typedef char Char;
+typedef unsigned char Bool;
+typedef unsigned char UChar;
+typedef int Int32;
+typedef unsigned int UInt32;
+typedef short Int16;
+typedef unsigned short UInt16;
+
+#define True ((Bool)1)
+#define False ((Bool)0)
+
+/*--
+ IntNative is your platform's `native' int size.
+ Only here to avoid probs with 64-bit platforms.
+--*/
+typedef int IntNative;
+
+
+/*---------------------------------------------------*/
+/*--- Misc (file handling) data decls ---*/
+/*---------------------------------------------------*/
+
+Int32 verbosity;
+Bool keepInputFiles, smallMode, deleteOutputOnInterrupt;
+Bool forceOverwrite, testFailsExist, unzFailsExist, noisy;
+Int32 numFileNames, numFilesProcessed, blockSize100k;
+Int32 exitValue;
+
+/*-- source modes; F==file, I==stdin, O==stdout --*/
+#define SM_I2O 1
+#define SM_F2O 2
+#define SM_F2F 3
+
+/*-- operation modes --*/
+#define OM_Z 1
+#define OM_UNZ 2
+#define OM_TEST 3
+
+Int32 opMode;
+Int32 srcMode;
+
+#define FILE_NAME_LEN 1034
+
+Int32 longestFileName;
+Char inName [FILE_NAME_LEN];
+Char outName[FILE_NAME_LEN];
+Char tmpName[FILE_NAME_LEN];
+Char *progName;
+Char progNameReally[FILE_NAME_LEN];
+FILE *outputHandleJustInCase;
+Int32 workFactor;
+
+static void panic ( const Char* ) NORETURN;
+static void ioError ( void ) NORETURN;
+static void outOfMemory ( void ) NORETURN;
+static void configError ( void ) NORETURN;
+static void crcError ( void ) NORETURN;
+static void cleanUpAndFail ( Int32 ) NORETURN;
+static void compressedStreamEOF ( void ) NORETURN;
+
+static void copyFileName ( Char*, Char* );
+static void* myMalloc ( Int32 );
+static void applySavedFileAttrToOutputFile ( IntNative fd );
+
+
+
+/*---------------------------------------------------*/
+/*--- An implementation of 64-bit ints. Sigh. ---*/
+/*--- Roll on widespread deployment of ANSI C9X ! ---*/
+/*---------------------------------------------------*/
+
+typedef
+ struct { UChar b[8]; }
+ UInt64;
+
+
+static
+void uInt64_from_UInt32s ( UInt64* n, UInt32 lo32, UInt32 hi32 )
+{
+ n->b[7] = (UChar)((hi32 >> 24) & 0xFF);
+ n->b[6] = (UChar)((hi32 >> 16) & 0xFF);
+ n->b[5] = (UChar)((hi32 >> 8) & 0xFF);
+ n->b[4] = (UChar) (hi32 & 0xFF);
+ n->b[3] = (UChar)((lo32 >> 24) & 0xFF);
+ n->b[2] = (UChar)((lo32 >> 16) & 0xFF);
+ n->b[1] = (UChar)((lo32 >> 8) & 0xFF);
+ n->b[0] = (UChar) (lo32 & 0xFF);
+}
+
+
+static
+double uInt64_to_double ( UInt64* n )
+{
+ Int32 i;
+ double base = 1.0;
+ double sum = 0.0;
+ for (i = 0; i < 8; i++) {
+ sum += base * (double)(n->b[i]);
+ base *= 256.0;
+ }
+ return sum;
+}
+
+
+static
+Bool uInt64_isZero ( UInt64* n )
+{
+ Int32 i;
+ for (i = 0; i < 8; i++)
+ if (n->b[i] != 0) return 0;
+ return 1;
+}
+
+
+/* Divide *n by 10, and return the remainder. */
+static
+Int32 uInt64_qrm10 ( UInt64* n )
+{
+ UInt32 rem, tmp;
+ Int32 i;
+ rem = 0;
+ for (i = 7; i >= 0; i--) {
+ tmp = rem * 256 + n->b[i];
+ n->b[i] = tmp / 10;
+ rem = tmp % 10;
+ }
+ return rem;
+}
+
+
+/* ... and the Whole Entire Point of all this UInt64 stuff is
+ so that we can supply the following function.
+*/
+static
+void uInt64_toAscii ( char* outbuf, UInt64* n )
+{
+ Int32 i, q;
+ UChar buf[32];
+ Int32 nBuf = 0;
+ UInt64 n_copy = *n;
+ do {
+ q = uInt64_qrm10 ( &n_copy );
+ buf[nBuf] = q + '0';
+ nBuf++;
+ } while (!uInt64_isZero(&n_copy));
+ outbuf[nBuf] = 0;
+ for (i = 0; i < nBuf; i++)
+ outbuf[i] = buf[nBuf-i-1];
+}
+
+
+/*---------------------------------------------------*/
+/*--- Processing of complete files and streams ---*/
+/*---------------------------------------------------*/
+
+/*---------------------------------------------*/
+static
+Bool myfeof ( FILE* f )
+{
+ Int32 c = fgetc ( f );
+ if (c == EOF) return True;
+ ungetc ( c, f );
+ return False;
+}
+
+
+/*---------------------------------------------*/
+static
+void compressStream ( FILE *stream, FILE *zStream )
+{
+ BZFILE* bzf = NULL;
+ UChar ibuf[5000];
+ Int32 nIbuf;
+ UInt32 nbytes_in_lo32, nbytes_in_hi32;
+ UInt32 nbytes_out_lo32, nbytes_out_hi32;
+ Int32 bzerr, bzerr_dummy, ret;
+
+ SET_BINARY_MODE(stream);
+ SET_BINARY_MODE(zStream);
+
+ if (ferror(stream)) goto errhandler_io;
+ if (ferror(zStream)) goto errhandler_io;
+
+ bzf = BZ2_bzWriteOpen ( &bzerr, zStream,
+ blockSize100k, verbosity, workFactor );
+ if (bzerr != BZ_OK) goto errhandler;
+
+ if (verbosity >= 2) fprintf ( stderr, "\n" );
+
+ while (True) {
+
+ if (myfeof(stream)) break;
+ nIbuf = fread ( ibuf, sizeof(UChar), 5000, stream );
+ if (ferror(stream)) goto errhandler_io;
+ if (nIbuf > 0) BZ2_bzWrite ( &bzerr, bzf, (void*)ibuf, nIbuf );
+ if (bzerr != BZ_OK) goto errhandler;
+
+ }
+
+ BZ2_bzWriteClose64 ( &bzerr, bzf, 0,
+ &nbytes_in_lo32, &nbytes_in_hi32,
+ &nbytes_out_lo32, &nbytes_out_hi32 );
+ if (bzerr != BZ_OK) goto errhandler;
+
+ if (ferror(zStream)) goto errhandler_io;
+ ret = fflush ( zStream );
+ if (ret == EOF) goto errhandler_io;
+ if (zStream != stdout) {
+ Int32 fd = fileno ( zStream );
+ if (fd < 0) goto errhandler_io;
+ applySavedFileAttrToOutputFile ( fd );
+ ret = fclose ( zStream );
+ outputHandleJustInCase = NULL;
+ if (ret == EOF) goto errhandler_io;
+ }
+ outputHandleJustInCase = NULL;
+ if (ferror(stream)) goto errhandler_io;
+ ret = fclose ( stream );
+ if (ret == EOF) goto errhandler_io;
+
+ if (verbosity >= 1) {
+ if (nbytes_in_lo32 == 0 && nbytes_in_hi32 == 0) {
+ fprintf ( stderr, " no data compressed.\n");
+ } else {
+ Char buf_nin[32], buf_nout[32];
+ UInt64 nbytes_in, nbytes_out;
+ double nbytes_in_d, nbytes_out_d;
+ uInt64_from_UInt32s ( &nbytes_in,
+ nbytes_in_lo32, nbytes_in_hi32 );
+ uInt64_from_UInt32s ( &nbytes_out,
+ nbytes_out_lo32, nbytes_out_hi32 );
+ nbytes_in_d = uInt64_to_double ( &nbytes_in );
+ nbytes_out_d = uInt64_to_double ( &nbytes_out );
+ uInt64_toAscii ( buf_nin, &nbytes_in );
+ uInt64_toAscii ( buf_nout, &nbytes_out );
+ fprintf ( stderr, "%6.3f:1, %6.3f bits/byte, "
+ "%5.2f%% saved, %s in, %s out.\n",
+ nbytes_in_d / nbytes_out_d,
+ (8.0 * nbytes_out_d) / nbytes_in_d,
+ 100.0 * (1.0 - nbytes_out_d / nbytes_in_d),
+ buf_nin,
+ buf_nout
+ );
+ }
+ }
+
+ return;
+
+ errhandler:
+ BZ2_bzWriteClose64 ( &bzerr_dummy, bzf, 1,
+ &nbytes_in_lo32, &nbytes_in_hi32,
+ &nbytes_out_lo32, &nbytes_out_hi32 );
+ switch (bzerr) {
+ case BZ_CONFIG_ERROR:
+ configError(); break;
+ case BZ_MEM_ERROR:
+ outOfMemory (); break;
+ case BZ_IO_ERROR:
+ errhandler_io:
+ ioError(); break;
+ default:
+ panic ( "compress:unexpected error" );
+ }
+
+ panic ( "compress:end" );
+ /*notreached*/
+}
+
+
+
+/*---------------------------------------------*/
+static
+Bool uncompressStream ( FILE *zStream, FILE *stream )
+{
+ BZFILE* bzf = NULL;
+ Int32 bzerr, bzerr_dummy, ret, nread, streamNo, i;
+ UChar obuf[5000];
+ UChar unused[BZ_MAX_UNUSED];
+ Int32 nUnused;
+ void* unusedTmpV;
+ UChar* unusedTmp;
+
+ nUnused = 0;
+ streamNo = 0;
+
+ SET_BINARY_MODE(stream);
+ SET_BINARY_MODE(zStream);
+
+ if (ferror(stream)) goto errhandler_io;
+ if (ferror(zStream)) goto errhandler_io;
+
+ while (True) {
+
+ bzf = BZ2_bzReadOpen (
+ &bzerr, zStream, verbosity,
+ (int)smallMode, unused, nUnused
+ );
+ if (bzf == NULL || bzerr != BZ_OK) goto errhandler;
+ streamNo++;
+
+ while (bzerr == BZ_OK) {
+ nread = BZ2_bzRead ( &bzerr, bzf, obuf, 5000 );
+ if (bzerr == BZ_DATA_ERROR_MAGIC) goto trycat;
+ if ((bzerr == BZ_OK || bzerr == BZ_STREAM_END) && nread > 0)
+ fwrite ( obuf, sizeof(UChar), nread, stream );
+ if (ferror(stream)) goto errhandler_io;
+ }
+ if (bzerr != BZ_STREAM_END) goto errhandler;
+
+ BZ2_bzReadGetUnused ( &bzerr, bzf, &unusedTmpV, &nUnused );
+ if (bzerr != BZ_OK) panic ( "decompress:bzReadGetUnused" );
+
+ unusedTmp = (UChar*)unusedTmpV;
+ for (i = 0; i < nUnused; i++) unused[i] = unusedTmp[i];
+
+ BZ2_bzReadClose ( &bzerr, bzf );
+ if (bzerr != BZ_OK) panic ( "decompress:bzReadGetUnused" );
+
+ if (nUnused == 0 && myfeof(zStream)) break;
+ }
+
+ closeok:
+ if (ferror(zStream)) goto errhandler_io;
+ if (stream != stdout) {
+ Int32 fd = fileno ( stream );
+ if (fd < 0) goto errhandler_io;
+ applySavedFileAttrToOutputFile ( fd );
+ }
+ ret = fclose ( zStream );
+ if (ret == EOF) goto errhandler_io;
+
+ if (ferror(stream)) goto errhandler_io;
+ ret = fflush ( stream );
+ if (ret != 0) goto errhandler_io;
+ if (stream != stdout) {
+ ret = fclose ( stream );
+ outputHandleJustInCase = NULL;
+ if (ret == EOF) goto errhandler_io;
+ }
+ outputHandleJustInCase = NULL;
+ if (verbosity >= 2) fprintf ( stderr, "\n " );
+ return True;
+
+ trycat:
+ if (forceOverwrite) {
+ rewind(zStream);
+ while (True) {
+ if (myfeof(zStream)) break;
+ nread = fread ( obuf, sizeof(UChar), 5000, zStream );
+ if (ferror(zStream)) goto errhandler_io;
+ if (nread > 0) fwrite ( obuf, sizeof(UChar), nread, stream );
+ if (ferror(stream)) goto errhandler_io;
+ }
+ goto closeok;
+ }
+
+ errhandler:
+ BZ2_bzReadClose ( &bzerr_dummy, bzf );
+ switch (bzerr) {
+ case BZ_CONFIG_ERROR:
+ configError(); break;
+ case BZ_IO_ERROR:
+ errhandler_io:
+ ioError(); break;
+ case BZ_DATA_ERROR:
+ crcError();
+ case BZ_MEM_ERROR:
+ outOfMemory();
+ case BZ_UNEXPECTED_EOF:
+ compressedStreamEOF();
+ case BZ_DATA_ERROR_MAGIC:
+ if (zStream != stdin) fclose(zStream);
+ if (stream != stdout) fclose(stream);
+ if (streamNo == 1) {
+ return False;
+ } else {
+ if (noisy)
+ fprintf ( stderr,
+ "\n%s: %s: trailing garbage after EOF ignored\n",
+ progName, inName );
+ return True;
+ }
+ default:
+ panic ( "decompress:unexpected error" );
+ }
+
+ panic ( "decompress:end" );
+ return True; /*notreached*/
+}
+
+
+/*---------------------------------------------*/
+static
+Bool testStream ( FILE *zStream )
+{
+ BZFILE* bzf = NULL;
+ Int32 bzerr, bzerr_dummy, ret, nread, streamNo, i;
+ UChar obuf[5000];
+ UChar unused[BZ_MAX_UNUSED];
+ Int32 nUnused;
+ void* unusedTmpV;
+ UChar* unusedTmp;
+
+ nUnused = 0;
+ streamNo = 0;
+
+ SET_BINARY_MODE(zStream);
+ if (ferror(zStream)) goto errhandler_io;
+
+ while (True) {
+
+ bzf = BZ2_bzReadOpen (
+ &bzerr, zStream, verbosity,
+ (int)smallMode, unused, nUnused
+ );
+ if (bzf == NULL || bzerr != BZ_OK) goto errhandler;
+ streamNo++;
+
+ while (bzerr == BZ_OK) {
+ nread = BZ2_bzRead ( &bzerr, bzf, obuf, 5000 );
+ if (bzerr == BZ_DATA_ERROR_MAGIC) goto errhandler;
+ }
+ if (bzerr != BZ_STREAM_END) goto errhandler;
+
+ BZ2_bzReadGetUnused ( &bzerr, bzf, &unusedTmpV, &nUnused );
+ if (bzerr != BZ_OK) panic ( "test:bzReadGetUnused" );
+
+ unusedTmp = (UChar*)unusedTmpV;
+ for (i = 0; i < nUnused; i++) unused[i] = unusedTmp[i];
+
+ BZ2_bzReadClose ( &bzerr, bzf );
+ if (bzerr != BZ_OK) panic ( "test:bzReadGetUnused" );
+ if (nUnused == 0 && myfeof(zStream)) break;
+
+ }
+
+ if (ferror(zStream)) goto errhandler_io;
+ ret = fclose ( zStream );
+ if (ret == EOF) goto errhandler_io;
+
+ if (verbosity >= 2) fprintf ( stderr, "\n " );
+ return True;
+
+ errhandler:
+ BZ2_bzReadClose ( &bzerr_dummy, bzf );
+ if (verbosity == 0)
+ fprintf ( stderr, "%s: %s: ", progName, inName );
+ switch (bzerr) {
+ case BZ_CONFIG_ERROR:
+ configError(); break;
+ case BZ_IO_ERROR:
+ errhandler_io:
+ ioError(); break;
+ case BZ_DATA_ERROR:
+ fprintf ( stderr,
+ "data integrity (CRC) error in data\n" );
+ return False;
+ case BZ_MEM_ERROR:
+ outOfMemory();
+ case BZ_UNEXPECTED_EOF:
+ fprintf ( stderr,
+ "file ends unexpectedly\n" );
+ return False;
+ case BZ_DATA_ERROR_MAGIC:
+ if (zStream != stdin) fclose(zStream);
+ if (streamNo == 1) {
+ fprintf ( stderr,
+ "bad magic number (file not created by bzip2)\n" );
+ return False;
+ } else {
+ if (noisy)
+ fprintf ( stderr,
+ "trailing garbage after EOF ignored\n" );
+ return True;
+ }
+ default:
+ panic ( "test:unexpected error" );
+ }
+
+ panic ( "test:end" );
+ return True; /*notreached*/
+}
+
+
+/*---------------------------------------------------*/
+/*--- Error [non-] handling grunge ---*/
+/*---------------------------------------------------*/
+
+/*---------------------------------------------*/
+static
+void setExit ( Int32 v )
+{
+ if (v > exitValue) exitValue = v;
+}
+
+
+/*---------------------------------------------*/
+static
+void cadvise ( void )
+{
+ if (noisy)
+ fprintf (
+ stderr,
+ "\nIt is possible that the compressed file(s) have become corrupted.\n"
+ "You can use the -tvv option to test integrity of such files.\n\n"
+ "You can use the `bzip2recover' program to attempt to recover\n"
+ "data from undamaged sections of corrupted files.\n\n"
+ );
+}
+
+
+/*---------------------------------------------*/
+static
+void showFileNames ( void )
+{
+ if (noisy)
+ fprintf (
+ stderr,
+ "\tInput file = %s, output file = %s\n",
+ inName, outName
+ );
+}
+
+
+/*---------------------------------------------*/
+static
+void cleanUpAndFail ( Int32 ec )
+{
+ IntNative retVal;
+ struct MY_STAT statBuf;
+
+ if ( srcMode == SM_F2F
+ && opMode != OM_TEST
+ && deleteOutputOnInterrupt ) {
+
+ /* Check whether input file still exists. Delete output file
+ only if input exists to avoid loss of data. Joerg Prante, 5
+ January 2002. (JRS 06-Jan-2002: other changes in 1.0.2 mean
+ this is less likely to happen. But to be ultra-paranoid, we
+ do the check anyway.) */
+ retVal = MY_STAT ( inName, &statBuf );
+ if (retVal == 0) {
+ if (noisy)
+ fprintf ( stderr,
+ "%s: Deleting output file %s, if it exists.\n",
+ progName, outName );
+ if (outputHandleJustInCase != NULL)
+ fclose ( outputHandleJustInCase );
+ retVal = remove ( outName );
+ if (retVal != 0)
+ fprintf ( stderr,
+ "%s: WARNING: deletion of output file "
+ "(apparently) failed.\n",
+ progName );
+ } else {
+ fprintf ( stderr,
+ "%s: WARNING: deletion of output file suppressed\n",
+ progName );
+ fprintf ( stderr,
+ "%s: since input file no longer exists. Output file\n",
+ progName );
+ fprintf ( stderr,
+ "%s: `%s' may be incomplete.\n",
+ progName, outName );
+ fprintf ( stderr,
+ "%s: I suggest doing an integrity test (bzip2 -tv)"
+ " of it.\n",
+ progName );
+ }
+ }
+
+ if (noisy && numFileNames > 0 && numFilesProcessed < numFileNames) {
+ fprintf ( stderr,
+ "%s: WARNING: some files have not been processed:\n"
+ "%s: %d specified on command line, %d not processed yet.\n\n",
+ progName, progName,
+ numFileNames, numFileNames - numFilesProcessed );
+ }
+ setExit(ec);
+ exit(exitValue);
+}
+
+
+/*---------------------------------------------*/
+static
+void panic ( const Char* s )
+{
+ fprintf ( stderr,
+ "\n%s: PANIC -- internal consistency error:\n"
+ "\t%s\n"
+ "\tThis is a BUG. Please report it to me at:\n"
+ "\tjseward@bzip.org\n",
+ progName, s );
+ showFileNames();
+ cleanUpAndFail( 3 );
+}
+
+
+/*---------------------------------------------*/
+static
+void crcError ( void )
+{
+ fprintf ( stderr,
+ "\n%s: Data integrity error when decompressing.\n",
+ progName );
+ showFileNames();
+ cadvise();
+ cleanUpAndFail( 2 );
+}
+
+
+/*---------------------------------------------*/
+static
+void compressedStreamEOF ( void )
+{
+ if (noisy) {
+ fprintf ( stderr,
+ "\n%s: Compressed file ends unexpectedly;\n\t"
+ "perhaps it is corrupted? *Possible* reason follows.\n",
+ progName );
+ perror ( progName );
+ showFileNames();
+ cadvise();
+ }
+ cleanUpAndFail( 2 );
+}
+
+
+/*---------------------------------------------*/
+static
+void ioError ( void )
+{
+ fprintf ( stderr,
+ "\n%s: I/O or other error, bailing out. "
+ "Possible reason follows.\n",
+ progName );
+ perror ( progName );
+ showFileNames();
+ cleanUpAndFail( 1 );
+}
+
+
+/*---------------------------------------------*/
+static
+void mySignalCatcher ( IntNative n )
+{
+ fprintf ( stderr,
+ "\n%s: Control-C or similar caught, quitting.\n",
+ progName );
+ cleanUpAndFail(1);
+}
+
+
+/*---------------------------------------------*/
+static
+void mySIGSEGVorSIGBUScatcher ( IntNative n )
+{
+ if (opMode == OM_Z)
+ fprintf (
+ stderr,
+ "\n%s: Caught a SIGSEGV or SIGBUS whilst compressing.\n"
+ "\n"
+ " Possible causes are (most likely first):\n"
+ " (1) This computer has unreliable memory or cache hardware\n"
+ " (a surprisingly common problem; try a different machine.)\n"
+ " (2) A bug in the compiler used to create this executable\n"
+ " (unlikely, if you didn't compile bzip2 yourself.)\n"
+ " (3) A real bug in bzip2 -- I hope this should never be the case.\n"
+ " The user's manual, Section 4.3, has more info on (1) and (2).\n"
+ " \n"
+ " If you suspect this is a bug in bzip2, or are unsure about (1)\n"
+ " or (2), feel free to report it to me at: jseward@bzip.org.\n"
+ " Section 4.3 of the user's manual describes the info a useful\n"
+ " bug report should have. If the manual is available on your\n"
+ " system, please try and read it before mailing me. If you don't\n"
+ " have the manual or can't be bothered to read it, mail me anyway.\n"
+ "\n",
+ progName );
+ else
+ fprintf (
+ stderr,
+ "\n%s: Caught a SIGSEGV or SIGBUS whilst decompressing.\n"
+ "\n"
+ " Possible causes are (most likely first):\n"
+ " (1) The compressed data is corrupted, and bzip2's usual checks\n"
+ " failed to detect this. Try bzip2 -tvv my_file.bz2.\n"
+ " (2) This computer has unreliable memory or cache hardware\n"
+ " (a surprisingly common problem; try a different machine.)\n"
+ " (3) A bug in the compiler used to create this executable\n"
+ " (unlikely, if you didn't compile bzip2 yourself.)\n"
+ " (4) A real bug in bzip2 -- I hope this should never be the case.\n"
+ " The user's manual, Section 4.3, has more info on (2) and (3).\n"
+ " \n"
+ " If you suspect this is a bug in bzip2, or are unsure about (2)\n"
+ " or (3), feel free to report it to me at: jseward@bzip.org.\n"
+ " Section 4.3 of the user's manual describes the info a useful\n"
+ " bug report should have. If the manual is available on your\n"
+ " system, please try and read it before mailing me. If you don't\n"
+ " have the manual or can't be bothered to read it, mail me anyway.\n"
+ "\n",
+ progName );
+
+ showFileNames();
+ if (opMode == OM_Z)
+ cleanUpAndFail( 3 ); else
+ { cadvise(); cleanUpAndFail( 2 ); }
+}
+
+
+/*---------------------------------------------*/
+static
+void outOfMemory ( void )
+{
+ fprintf ( stderr,
+ "\n%s: couldn't allocate enough memory\n",
+ progName );
+ showFileNames();
+ cleanUpAndFail(1);
+}
+
+
+/*---------------------------------------------*/
+static
+void configError ( void )
+{
+ fprintf ( stderr,
+ "bzip2: I'm not configured correctly for this platform!\n"
+ "\tI require Int32, Int16 and Char to have sizes\n"
+ "\tof 4, 2 and 1 bytes to run properly, and they don't.\n"
+ "\tProbably you can fix this by defining them correctly,\n"
+ "\tand recompiling. Bye!\n" );
+ setExit(3);
+ exit(exitValue);
+}
+
+
+/*---------------------------------------------------*/
+/*--- The main driver machinery ---*/
+/*---------------------------------------------------*/
+
+/* All rather crufty. The main problem is that input files
+ are stat()d multiple times before use. This should be
+ cleaned up.
+*/
+
+/*---------------------------------------------*/
+static
+void pad ( Char *s )
+{
+ Int32 i;
+ if ( (Int32)strlen(s) >= longestFileName ) return;
+ for (i = 1; i <= longestFileName - (Int32)strlen(s); i++)
+ fprintf ( stderr, " " );
+}
+
+
+/*---------------------------------------------*/
+static
+void copyFileName ( Char* to, Char* from )
+{
+ if ( strlen(from) > FILE_NAME_LEN-10 ) {
+ fprintf (
+ stderr,
+ "bzip2: file name\n`%s'\n"
+ "is suspiciously (more than %d chars) long.\n"
+ "Try using a reasonable file name instead. Sorry! :-)\n",
+ from, FILE_NAME_LEN-10
+ );
+ setExit(1);
+ exit(exitValue);
+ }
+
+ strncpy(to,from,FILE_NAME_LEN-10);
+ to[FILE_NAME_LEN-10]='\0';
+}
+
+
+/*---------------------------------------------*/
+static
+Bool fileExists ( Char* name )
+{
+ FILE *tmp = fopen ( name, "rb" );
+ Bool exists = (tmp != NULL);
+ if (tmp != NULL) fclose ( tmp );
+ return exists;
+}
+
+
+/*---------------------------------------------*/
+/* Open an output file safely with O_EXCL and good permissions.
+ This avoids a race condition in versions < 1.0.2, in which
+ the file was first opened and then had its interim permissions
+ set safely. We instead use open() to create the file with
+ the interim permissions required. (--- --- rw-).
+
+ For non-Unix platforms, if we are not worrying about
+ security issues, simple this simply behaves like fopen.
+*/
+static
+FILE* fopen_output_safely ( Char* name, const char* mode )
+{
+# if BZ_UNIX
+ FILE* fp;
+ IntNative fh;
+ fh = open(name, O_WRONLY|O_CREAT|O_EXCL, S_IWUSR|S_IRUSR);
+ if (fh == -1) return NULL;
+ fp = fdopen(fh, mode);
+ if (fp == NULL) close(fh);
+ return fp;
+# else
+ return fopen(name, mode);
+# endif
+}
+
+
+/*---------------------------------------------*/
+/*--
+ if in doubt, return True
+--*/
+static
+Bool notAStandardFile ( Char* name )
+{
+ IntNative i;
+ struct MY_STAT statBuf;
+
+ i = MY_LSTAT ( name, &statBuf );
+ if (i != 0) return True;
+ if (MY_S_ISREG(statBuf.st_mode)) return False;
+ return True;
+}
+
+
+/*---------------------------------------------*/
+/*--
+ rac 11/21/98 see if file has hard links to it
+--*/
+static
+Int32 countHardLinks ( Char* name )
+{
+ IntNative i;
+ struct MY_STAT statBuf;
+
+ i = MY_LSTAT ( name, &statBuf );
+ if (i != 0) return 0;
+ return (statBuf.st_nlink - 1);
+}
+
+
+/*---------------------------------------------*/
+/* Copy modification date, access date, permissions and owner from the
+ source to destination file. We have to copy this meta-info off
+ into fileMetaInfo before starting to compress / decompress it,
+ because doing it afterwards means we get the wrong access time.
+
+ To complicate matters, in compress() and decompress() below, the
+ sequence of tests preceding the call to saveInputFileMetaInfo()
+ involves calling fileExists(), which in turn establishes its result
+ by attempting to fopen() the file, and if successful, immediately
+ fclose()ing it again. So we have to assume that the fopen() call
+ does not cause the access time field to be updated.
+
+ Reading of the man page for stat() (man 2 stat) on RedHat 7.2 seems
+ to imply that merely doing open() will not affect the access time.
+ Therefore we merely need to hope that the C library only does
+ open() as a result of fopen(), and not any kind of read()-ahead
+ cleverness.
+
+ It sounds pretty fragile to me. Whether this carries across
+ robustly to arbitrary Unix-like platforms (or even works robustly
+ on this one, RedHat 7.2) is unknown to me. Nevertheless ...
+*/
+#if BZ_UNIX
+static
+struct MY_STAT fileMetaInfo;
+#endif
+
+static
+void saveInputFileMetaInfo ( Char *srcName )
+{
+# if BZ_UNIX
+ IntNative retVal;
+ /* Note use of stat here, not lstat. */
+ retVal = MY_STAT( srcName, &fileMetaInfo );
+ ERROR_IF_NOT_ZERO ( retVal );
+# endif
+}
+
+
+static
+void applySavedTimeInfoToOutputFile ( Char *dstName )
+{
+# if BZ_UNIX
+ IntNative retVal;
+ struct utimbuf uTimBuf;
+
+ uTimBuf.actime = fileMetaInfo.st_atime;
+ uTimBuf.modtime = fileMetaInfo.st_mtime;
+
+ retVal = utime ( dstName, &uTimBuf );
+ ERROR_IF_NOT_ZERO ( retVal );
+# endif
+}
+
+static
+void applySavedFileAttrToOutputFile ( IntNative fd )
+{
+# if BZ_UNIX
+ IntNative retVal;
+
+ retVal = fchmod ( fd, fileMetaInfo.st_mode );
+ ERROR_IF_NOT_ZERO ( retVal );
+
+ (void) fchown ( fd, fileMetaInfo.st_uid, fileMetaInfo.st_gid );
+ /* chown() will in many cases return with EPERM, which can
+ be safely ignored.
+ */
+# endif
+}
+
+
+/*---------------------------------------------*/
+static
+Bool containsDubiousChars ( Char* name )
+{
+# if BZ_UNIX
+ /* On unix, files can contain any characters and the file expansion
+ * is performed by the shell.
+ */
+ return False;
+# else /* ! BZ_UNIX */
+ /* On non-unix (Win* platforms), wildcard characters are not allowed in
+ * filenames.
+ */
+ for (; *name != '\0'; name++)
+ if (*name == '?' || *name == '*') return True;
+ return False;
+# endif /* BZ_UNIX */
+}
+
+
+/*---------------------------------------------*/
+#define BZ_N_SUFFIX_PAIRS 4
+
+const Char* zSuffix[BZ_N_SUFFIX_PAIRS]
+ = { ".bz2", ".bz", ".tbz2", ".tbz" };
+const Char* unzSuffix[BZ_N_SUFFIX_PAIRS]
+ = { "", "", ".tar", ".tar" };
+
+static
+Bool hasSuffix ( Char* s, const Char* suffix )
+{
+ Int32 ns = strlen(s);
+ Int32 nx = strlen(suffix);
+ if (ns < nx) return False;
+ if (strcmp(s + ns - nx, suffix) == 0) return True;
+ return False;
+}
+
+static
+Bool mapSuffix ( Char* name,
+ const Char* oldSuffix,
+ const Char* newSuffix )
+{
+ if (!hasSuffix(name,oldSuffix)) return False;
+ name[strlen(name)-strlen(oldSuffix)] = 0;
+ strcat ( name, newSuffix );
+ return True;
+}
+
+
+/*---------------------------------------------*/
+static
+void compress ( Char *name )
+{
+ FILE *inStr;
+ FILE *outStr;
+ Int32 n, i;
+ struct MY_STAT statBuf;
+
+ deleteOutputOnInterrupt = False;
+
+ if (name == NULL && srcMode != SM_I2O)
+ panic ( "compress: bad modes\n" );
+
+ switch (srcMode) {
+ case SM_I2O:
+ copyFileName ( inName, (Char*)"(stdin)" );
+ copyFileName ( outName, (Char*)"(stdout)" );
+ break;
+ case SM_F2F:
+ copyFileName ( inName, name );
+ copyFileName ( outName, name );
+ strcat ( outName, ".bz2" );
+ break;
+ case SM_F2O:
+ copyFileName ( inName, name );
+ copyFileName ( outName, (Char*)"(stdout)" );
+ break;
+ }
+
+ if ( srcMode != SM_I2O && containsDubiousChars ( inName ) ) {
+ if (noisy)
+ fprintf ( stderr, "%s: There are no files matching `%s'.\n",
+ progName, inName );
+ setExit(1);
+ return;
+ }
+ if ( srcMode != SM_I2O && !fileExists ( inName ) ) {
+ fprintf ( stderr, "%s: Can't open input file %s: %s.\n",
+ progName, inName, strerror(errno) );
+ setExit(1);
+ return;
+ }
+ for (i = 0; i < BZ_N_SUFFIX_PAIRS; i++) {
+ if (hasSuffix(inName, zSuffix[i])) {
+ if (noisy)
+ fprintf ( stderr,
+ "%s: Input file %s already has %s suffix.\n",
+ progName, inName, zSuffix[i] );
+ setExit(1);
+ return;
+ }
+ }
+ if ( srcMode == SM_F2F || srcMode == SM_F2O ) {
+ MY_STAT(inName, &statBuf);
+ if ( MY_S_ISDIR(statBuf.st_mode) ) {
+ fprintf( stderr,
+ "%s: Input file %s is a directory.\n",
+ progName,inName);
+ setExit(1);
+ return;
+ }
+ }
+ if ( srcMode == SM_F2F && !forceOverwrite && notAStandardFile ( inName )) {
+ if (noisy)
+ fprintf ( stderr, "%s: Input file %s is not a normal file.\n",
+ progName, inName );
+ setExit(1);
+ return;
+ }
+ if ( srcMode == SM_F2F && fileExists ( outName ) ) {
+ if (forceOverwrite) {
+ remove(outName);
+ } else {
+ fprintf ( stderr, "%s: Output file %s already exists.\n",
+ progName, outName );
+ setExit(1);
+ return;
+ }
+ }
+ if ( srcMode == SM_F2F && !forceOverwrite &&
+ (n=countHardLinks ( inName )) > 0) {
+ fprintf ( stderr, "%s: Input file %s has %d other link%s.\n",
+ progName, inName, n, n > 1 ? "s" : "" );
+ setExit(1);
+ return;
+ }
+
+ if ( srcMode == SM_F2F ) {
+ /* Save the file's meta-info before we open it. Doing it later
+ means we mess up the access times. */
+ saveInputFileMetaInfo ( inName );
+ }
+
+ switch ( srcMode ) {
+
+ case SM_I2O:
+ inStr = stdin;
+ outStr = stdout;
+ if ( isatty ( fileno ( stdout ) ) ) {
+ fprintf ( stderr,
+ "%s: I won't write compressed data to a terminal.\n",
+ progName );
+ fprintf ( stderr, "%s: For help, type: `%s --help'.\n",
+ progName, progName );
+ setExit(1);
+ return;
+ };
+ break;
+
+ case SM_F2O:
+ inStr = fopen ( inName, "rb" );
+ outStr = stdout;
+ if ( isatty ( fileno ( stdout ) ) ) {
+ fprintf ( stderr,
+ "%s: I won't write compressed data to a terminal.\n",
+ progName );
+ fprintf ( stderr, "%s: For help, type: `%s --help'.\n",
+ progName, progName );
+ if ( inStr != NULL ) fclose ( inStr );
+ setExit(1);
+ return;
+ };
+ if ( inStr == NULL ) {
+ fprintf ( stderr, "%s: Can't open input file %s: %s.\n",
+ progName, inName, strerror(errno) );
+ setExit(1);
+ return;
+ };
+ break;
+
+ case SM_F2F:
+ inStr = fopen ( inName, "rb" );
+ outStr = fopen_output_safely ( outName, "wb" );
+ if ( outStr == NULL) {
+ fprintf ( stderr, "%s: Can't create output file %s: %s.\n",
+ progName, outName, strerror(errno) );
+ if ( inStr != NULL ) fclose ( inStr );
+ setExit(1);
+ return;
+ }
+ if ( inStr == NULL ) {
+ fprintf ( stderr, "%s: Can't open input file %s: %s.\n",
+ progName, inName, strerror(errno) );
+ if ( outStr != NULL ) fclose ( outStr );
+ setExit(1);
+ return;
+ };
+ break;
+
+ default:
+ panic ( "compress: bad srcMode" );
+ break;
+ }
+
+ if (verbosity >= 1) {
+ fprintf ( stderr, " %s: ", inName );
+ pad ( inName );
+ fflush ( stderr );
+ }
+
+ /*--- Now the input and output handles are sane. Do the Biz. ---*/
+ outputHandleJustInCase = outStr;
+ deleteOutputOnInterrupt = True;
+ compressStream ( inStr, outStr );
+ outputHandleJustInCase = NULL;
+
+ /*--- If there was an I/O error, we won't get here. ---*/
+ if ( srcMode == SM_F2F ) {
+ applySavedTimeInfoToOutputFile ( outName );
+ deleteOutputOnInterrupt = False;
+ if ( !keepInputFiles ) {
+ IntNative retVal = remove ( inName );
+ ERROR_IF_NOT_ZERO ( retVal );
+ }
+ }
+
+ deleteOutputOnInterrupt = False;
+}
+
+
+/*---------------------------------------------*/
+static
+void uncompress ( Char *name )
+{
+ FILE *inStr;
+ FILE *outStr;
+ Int32 n, i;
+ Bool magicNumberOK;
+ Bool cantGuess;
+ struct MY_STAT statBuf;
+
+ deleteOutputOnInterrupt = False;
+
+ if (name == NULL && srcMode != SM_I2O)
+ panic ( "uncompress: bad modes\n" );
+
+ cantGuess = False;
+ switch (srcMode) {
+ case SM_I2O:
+ copyFileName ( inName, (Char*)"(stdin)" );
+ copyFileName ( outName, (Char*)"(stdout)" );
+ break;
+ case SM_F2F:
+ copyFileName ( inName, name );
+ copyFileName ( outName, name );
+ for (i = 0; i < BZ_N_SUFFIX_PAIRS; i++)
+ if (mapSuffix(outName,zSuffix[i],unzSuffix[i]))
+ goto zzz;
+ cantGuess = True;
+ strcat ( outName, ".out" );
+ break;
+ case SM_F2O:
+ copyFileName ( inName, name );
+ copyFileName ( outName, (Char*)"(stdout)" );
+ break;
+ }
+
+ zzz:
+ if ( srcMode != SM_I2O && containsDubiousChars ( inName ) ) {
+ if (noisy)
+ fprintf ( stderr, "%s: There are no files matching `%s'.\n",
+ progName, inName );
+ setExit(1);
+ return;
+ }
+ if ( srcMode != SM_I2O && !fileExists ( inName ) ) {
+ fprintf ( stderr, "%s: Can't open input file %s: %s.\n",
+ progName, inName, strerror(errno) );
+ setExit(1);
+ return;
+ }
+ if ( srcMode == SM_F2F || srcMode == SM_F2O ) {
+ MY_STAT(inName, &statBuf);
+ if ( MY_S_ISDIR(statBuf.st_mode) ) {
+ fprintf( stderr,
+ "%s: Input file %s is a directory.\n",
+ progName,inName);
+ setExit(1);
+ return;
+ }
+ }
+ if ( srcMode == SM_F2F && !forceOverwrite && notAStandardFile ( inName )) {
+ if (noisy)
+ fprintf ( stderr, "%s: Input file %s is not a normal file.\n",
+ progName, inName );
+ setExit(1);
+ return;
+ }
+ if ( /* srcMode == SM_F2F implied && */ cantGuess ) {
+ if (noisy)
+ fprintf ( stderr,
+ "%s: Can't guess original name for %s -- using %s\n",
+ progName, inName, outName );
+ /* just a warning, no return */
+ }
+ if ( srcMode == SM_F2F && fileExists ( outName ) ) {
+ if (forceOverwrite) {
+ remove(outName);
+ } else {
+ fprintf ( stderr, "%s: Output file %s already exists.\n",
+ progName, outName );
+ setExit(1);
+ return;
+ }
+ }
+ if ( srcMode == SM_F2F && !forceOverwrite &&
+ (n=countHardLinks ( inName ) ) > 0) {
+ fprintf ( stderr, "%s: Input file %s has %d other link%s.\n",
+ progName, inName, n, n > 1 ? "s" : "" );
+ setExit(1);
+ return;
+ }
+
+ if ( srcMode == SM_F2F ) {
+ /* Save the file's meta-info before we open it. Doing it later
+ means we mess up the access times. */
+ saveInputFileMetaInfo ( inName );
+ }
+
+ switch ( srcMode ) {
+
+ case SM_I2O:
+ inStr = stdin;
+ outStr = stdout;
+ if ( isatty ( fileno ( stdin ) ) ) {
+ fprintf ( stderr,
+ "%s: I won't read compressed data from a terminal.\n",
+ progName );
+ fprintf ( stderr, "%s: For help, type: `%s --help'.\n",
+ progName, progName );
+ setExit(1);
+ return;
+ };
+ break;
+
+ case SM_F2O:
+ inStr = fopen ( inName, "rb" );
+ outStr = stdout;
+ if ( inStr == NULL ) {
+ fprintf ( stderr, "%s: Can't open input file %s:%s.\n",
+ progName, inName, strerror(errno) );
+ if ( inStr != NULL ) fclose ( inStr );
+ setExit(1);
+ return;
+ };
+ break;
+
+ case SM_F2F:
+ inStr = fopen ( inName, "rb" );
+ outStr = fopen_output_safely ( outName, "wb" );
+ if ( outStr == NULL) {
+ fprintf ( stderr, "%s: Can't create output file %s: %s.\n",
+ progName, outName, strerror(errno) );
+ if ( inStr != NULL ) fclose ( inStr );
+ setExit(1);
+ return;
+ }
+ if ( inStr == NULL ) {
+ fprintf ( stderr, "%s: Can't open input file %s: %s.\n",
+ progName, inName, strerror(errno) );
+ if ( outStr != NULL ) fclose ( outStr );
+ setExit(1);
+ return;
+ };
+ break;
+
+ default:
+ panic ( "uncompress: bad srcMode" );
+ break;
+ }
+
+ if (verbosity >= 1) {
+ fprintf ( stderr, " %s: ", inName );
+ pad ( inName );
+ fflush ( stderr );
+ }
+
+ /*--- Now the input and output handles are sane. Do the Biz. ---*/
+ outputHandleJustInCase = outStr;
+ deleteOutputOnInterrupt = True;
+ magicNumberOK = uncompressStream ( inStr, outStr );
+ outputHandleJustInCase = NULL;
+
+ /*--- If there was an I/O error, we won't get here. ---*/
+ if ( magicNumberOK ) {
+ if ( srcMode == SM_F2F ) {
+ applySavedTimeInfoToOutputFile ( outName );
+ deleteOutputOnInterrupt = False;
+ if ( !keepInputFiles ) {
+ IntNative retVal = remove ( inName );
+ ERROR_IF_NOT_ZERO ( retVal );
+ }
+ }
+ } else {
+ unzFailsExist = True;
+ deleteOutputOnInterrupt = False;
+ if ( srcMode == SM_F2F ) {
+ IntNative retVal = remove ( outName );
+ ERROR_IF_NOT_ZERO ( retVal );
+ }
+ }
+ deleteOutputOnInterrupt = False;
+
+ if ( magicNumberOK ) {
+ if (verbosity >= 1)
+ fprintf ( stderr, "done\n" );
+ } else {
+ setExit(2);
+ if (verbosity >= 1)
+ fprintf ( stderr, "not a bzip2 file.\n" ); else
+ fprintf ( stderr,
+ "%s: %s is not a bzip2 file.\n",
+ progName, inName );
+ }
+
+}
+
+
+/*---------------------------------------------*/
+static
+void testf ( Char *name )
+{
+ FILE *inStr;
+ Bool allOK;
+ struct MY_STAT statBuf;
+
+ deleteOutputOnInterrupt = False;
+
+ if (name == NULL && srcMode != SM_I2O)
+ panic ( "testf: bad modes\n" );
+
+ copyFileName ( outName, (Char*)"(none)" );
+ switch (srcMode) {
+ case SM_I2O: copyFileName ( inName, (Char*)"(stdin)" ); break;
+ case SM_F2F: copyFileName ( inName, name ); break;
+ case SM_F2O: copyFileName ( inName, name ); break;
+ }
+
+ if ( srcMode != SM_I2O && containsDubiousChars ( inName ) ) {
+ if (noisy)
+ fprintf ( stderr, "%s: There are no files matching `%s'.\n",
+ progName, inName );
+ setExit(1);
+ return;
+ }
+ if ( srcMode != SM_I2O && !fileExists ( inName ) ) {
+ fprintf ( stderr, "%s: Can't open input %s: %s.\n",
+ progName, inName, strerror(errno) );
+ setExit(1);
+ return;
+ }
+ if ( srcMode != SM_I2O ) {
+ MY_STAT(inName, &statBuf);
+ if ( MY_S_ISDIR(statBuf.st_mode) ) {
+ fprintf( stderr,
+ "%s: Input file %s is a directory.\n",
+ progName,inName);
+ setExit(1);
+ return;
+ }
+ }
+
+ switch ( srcMode ) {
+
+ case SM_I2O:
+ if ( isatty ( fileno ( stdin ) ) ) {
+ fprintf ( stderr,
+ "%s: I won't read compressed data from a terminal.\n",
+ progName );
+ fprintf ( stderr, "%s: For help, type: `%s --help'.\n",
+ progName, progName );
+ setExit(1);
+ return;
+ };
+ inStr = stdin;
+ break;
+
+ case SM_F2O: case SM_F2F:
+ inStr = fopen ( inName, "rb" );
+ if ( inStr == NULL ) {
+ fprintf ( stderr, "%s: Can't open input file %s:%s.\n",
+ progName, inName, strerror(errno) );
+ setExit(1);
+ return;
+ };
+ break;
+
+ default:
+ panic ( "testf: bad srcMode" );
+ break;
+ }
+
+ if (verbosity >= 1) {
+ fprintf ( stderr, " %s: ", inName );
+ pad ( inName );
+ fflush ( stderr );
+ }
+
+ /*--- Now the input handle is sane. Do the Biz. ---*/
+ outputHandleJustInCase = NULL;
+ allOK = testStream ( inStr );
+
+ if (allOK && verbosity >= 1) fprintf ( stderr, "ok\n" );
+ if (!allOK) testFailsExist = True;
+}
+
+
+/*---------------------------------------------*/
+static
+void license ( void )
+{
+ fprintf ( stderr,
+
+ "bzip2, a block-sorting file compressor. "
+ "Version %s.\n"
+ " \n"
+ " Copyright (C) 1996-2010 by Julian Seward.\n"
+ " \n"
+ " This program is free software; you can redistribute it and/or modify\n"
+ " it under the terms set out in the LICENSE file, which is included\n"
+ " in the bzip2-1.0.6 source distribution.\n"
+ " \n"
+ " This program is distributed in the hope that it will be useful,\n"
+ " but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
+ " MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
+ " LICENSE file for more details.\n"
+ " \n",
+ BZ2_bzlibVersion()
+ );
+}
+
+
+/*---------------------------------------------*/
+static
+void usage ( Char *fullProgName )
+{
+ fprintf (
+ stderr,
+ "bzip2, a block-sorting file compressor. "
+ "Version %s.\n"
+ "\n usage: %s [flags and input files in any order]\n"
+ "\n"
+ " -h --help print this message\n"
+ " -d --decompress force decompression\n"
+ " -z --compress force compression\n"
+ " -k --keep keep (don't delete) input files\n"
+ " -f --force overwrite existing output files\n"
+ " -t --test test compressed file integrity\n"
+ " -c --stdout output to standard out\n"
+ " -q --quiet suppress noncritical error messages\n"
+ " -v --verbose be verbose (a 2nd -v gives more)\n"
+ " -L --license display software version & license\n"
+ " -V --version display software version & license\n"
+ " -s --small use less memory (at most 2500k)\n"
+ " -1 .. -9 set block size to 100k .. 900k\n"
+ " --fast alias for -1\n"
+ " --best alias for -9\n"
+ "\n"
+ " If invoked as `bzip2', default action is to compress.\n"
+ " as `bunzip2', default action is to decompress.\n"
+ " as `bzcat', default action is to decompress to stdout.\n"
+ "\n"
+ " If no file names are given, bzip2 compresses or decompresses\n"
+ " from standard input to standard output. You can combine\n"
+ " short flags, so `-v -4' means the same as -v4 or -4v, &c.\n"
+# if BZ_UNIX
+ "\n"
+# endif
+ ,
+
+ BZ2_bzlibVersion(),
+ fullProgName
+ );
+}
+
+
+/*---------------------------------------------*/
+static
+void redundant ( Char* flag )
+{
+ fprintf (
+ stderr,
+ "%s: %s is redundant in versions 0.9.5 and above\n",
+ progName, flag );
+}
+
+
+/*---------------------------------------------*/
+/*--
+ All the garbage from here to main() is purely to
+ implement a linked list of command-line arguments,
+ into which main() copies argv[1 .. argc-1].
+
+ The purpose of this exercise is to facilitate
+ the expansion of wildcard characters * and ? in
+ filenames for OSs which don't know how to do it
+ themselves, like MSDOS, Windows 95 and NT.
+
+ The actual Dirty Work is done by the platform-
+ specific macro APPEND_FILESPEC.
+--*/
+
+typedef
+ struct zzzz {
+ Char *name;
+ struct zzzz *link;
+ }
+ Cell;
+
+
+/*---------------------------------------------*/
+static
+void *myMalloc ( Int32 n )
+{
+ void* p;
+
+ p = malloc ( (size_t)n );
+ if (p == NULL) outOfMemory ();
+ return p;
+}
+
+
+/*---------------------------------------------*/
+static
+Cell *mkCell ( void )
+{
+ Cell *c;
+
+ c = (Cell*) myMalloc ( sizeof ( Cell ) );
+ c->name = NULL;
+ c->link = NULL;
+ return c;
+}
+
+
+/*---------------------------------------------*/
+static
+Cell *snocString ( Cell *root, Char *name )
+{
+ if (root == NULL) {
+ Cell *tmp = mkCell();
+ tmp->name = (Char*) myMalloc ( 5 + strlen(name) );
+ strcpy ( tmp->name, name );
+ return tmp;
+ } else {
+ Cell *tmp = root;
+ while (tmp->link != NULL) tmp = tmp->link;
+ tmp->link = snocString ( tmp->link, name );
+ return root;
+ }
+}
+
+
+/*---------------------------------------------*/
+static
+void addFlagsFromEnvVar ( Cell** argList, Char* varName )
+{
+ Int32 i, j, k;
+ Char *envbase, *p;
+
+ envbase = getenv(varName);
+ if (envbase != NULL) {
+ p = envbase;
+ i = 0;
+ while (True) {
+ if (p[i] == 0) break;
+ p += i;
+ i = 0;
+ while (isspace((Int32)(p[0]))) p++;
+ while (p[i] != 0 && !isspace((Int32)(p[i]))) i++;
+ if (i > 0) {
+ k = i; if (k > FILE_NAME_LEN-10) k = FILE_NAME_LEN-10;
+ for (j = 0; j < k; j++) tmpName[j] = p[j];
+ tmpName[k] = 0;
+ APPEND_FLAG(*argList, tmpName);
+ }
+ }
+ }
+}
+
+
+/*---------------------------------------------*/
+#define ISFLAG(s) (strcmp(aa->name, (s))==0)
+
+IntNative main ( IntNative argc, Char *argv[] )
+{
+ Int32 i, j;
+ Char *tmp;
+ Cell *argList;
+ Cell *aa;
+ Bool decode;
+
+ /*-- Be really really really paranoid :-) --*/
+ if (sizeof(Int32) != 4 || sizeof(UInt32) != 4 ||
+ sizeof(Int16) != 2 || sizeof(UInt16) != 2 ||
+ sizeof(Char) != 1 || sizeof(UChar) != 1)
+ configError();
+
+ /*-- Initialise --*/
+ outputHandleJustInCase = NULL;
+ smallMode = False;
+ keepInputFiles = False;
+ forceOverwrite = False;
+ noisy = True;
+ verbosity = 0;
+ blockSize100k = 9;
+ testFailsExist = False;
+ unzFailsExist = False;
+ numFileNames = 0;
+ numFilesProcessed = 0;
+ workFactor = 30;
+ deleteOutputOnInterrupt = False;
+ exitValue = 0;
+ i = j = 0; /* avoid bogus warning from egcs-1.1.X */
+
+ /*-- Set up signal handlers for mem access errors --*/
+ signal (SIGSEGV, mySIGSEGVorSIGBUScatcher);
+# if BZ_UNIX
+# ifndef __DJGPP__
+ signal (SIGBUS, mySIGSEGVorSIGBUScatcher);
+# endif
+# endif
+
+ copyFileName ( inName, (Char*)"(none)" );
+ copyFileName ( outName, (Char*)"(none)" );
+
+ copyFileName ( progNameReally, argv[0] );
+ progName = &progNameReally[0];
+ for (tmp = &progNameReally[0]; *tmp != '\0'; tmp++)
+ if (*tmp == PATH_SEP) progName = tmp + 1;
+
+
+ /*-- Copy flags from env var BZIP2, and
+ expand filename wildcards in arg list.
+ --*/
+ argList = NULL;
+ addFlagsFromEnvVar ( &argList, (Char*)"BZIP2" );
+ addFlagsFromEnvVar ( &argList, (Char*)"BZIP" );
+ for (i = 1; i <= argc-1; i++)
+ APPEND_FILESPEC(argList, argv[i]);
+
+
+ /*-- Find the length of the longest filename --*/
+ longestFileName = 7;
+ numFileNames = 0;
+ decode = True;
+ for (aa = argList; aa != NULL; aa = aa->link) {
+ if (ISFLAG("--")) { decode = False; continue; }
+ if (aa->name[0] == '-' && decode) continue;
+ numFileNames++;
+ if (longestFileName < (Int32)strlen(aa->name) )
+ longestFileName = (Int32)strlen(aa->name);
+ }
+
+
+ /*-- Determine source modes; flag handling may change this too. --*/
+ if (numFileNames == 0)
+ srcMode = SM_I2O; else srcMode = SM_F2F;
+
+
+ /*-- Determine what to do (compress/uncompress/test/cat). --*/
+ /*-- Note that subsequent flag handling may change this. --*/
+ opMode = OM_Z;
+
+ if ( (strstr ( progName, "unzip" ) != 0) ||
+ (strstr ( progName, "UNZIP" ) != 0) )
+ opMode = OM_UNZ;
+
+ if ( (strstr ( progName, "z2cat" ) != 0) ||
+ (strstr ( progName, "Z2CAT" ) != 0) ||
+ (strstr ( progName, "zcat" ) != 0) ||
+ (strstr ( progName, "ZCAT" ) != 0) ) {
+ opMode = OM_UNZ;
+ srcMode = (numFileNames == 0) ? SM_I2O : SM_F2O;
+ }
+
+
+ /*-- Look at the flags. --*/
+ for (aa = argList; aa != NULL; aa = aa->link) {
+ if (ISFLAG("--")) break;
+ if (aa->name[0] == '-' && aa->name[1] != '-') {
+ for (j = 1; aa->name[j] != '\0'; j++) {
+ switch (aa->name[j]) {
+ case 'c': srcMode = SM_F2O; break;
+ case 'd': opMode = OM_UNZ; break;
+ case 'z': opMode = OM_Z; break;
+ case 'f': forceOverwrite = True; break;
+ case 't': opMode = OM_TEST; break;
+ case 'k': keepInputFiles = True; break;
+ case 's': smallMode = True; break;
+ case 'q': noisy = False; break;
+ case '1': blockSize100k = 1; break;
+ case '2': blockSize100k = 2; break;
+ case '3': blockSize100k = 3; break;
+ case '4': blockSize100k = 4; break;
+ case '5': blockSize100k = 5; break;
+ case '6': blockSize100k = 6; break;
+ case '7': blockSize100k = 7; break;
+ case '8': blockSize100k = 8; break;
+ case '9': blockSize100k = 9; break;
+ case 'V':
+ case 'L': license();
+ exit ( 0 );
+ break;
+ case 'v': verbosity++; break;
+ case 'h': usage ( progName );
+ exit ( 0 );
+ break;
+ default: fprintf ( stderr, "%s: Bad flag `%s'\n",
+ progName, aa->name );
+ usage ( progName );
+ exit ( 1 );
+ break;
+ }
+ }
+ }
+ }
+
+ /*-- And again ... --*/
+ for (aa = argList; aa != NULL; aa = aa->link) {
+ if (ISFLAG("--")) break;
+ if (ISFLAG("--stdout")) srcMode = SM_F2O; else
+ if (ISFLAG("--decompress")) opMode = OM_UNZ; else
+ if (ISFLAG("--compress")) opMode = OM_Z; else
+ if (ISFLAG("--force")) forceOverwrite = True; else
+ if (ISFLAG("--test")) opMode = OM_TEST; else
+ if (ISFLAG("--keep")) keepInputFiles = True; else
+ if (ISFLAG("--small")) smallMode = True; else
+ if (ISFLAG("--quiet")) noisy = False; else
+ if (ISFLAG("--version")) { license(); exit ( 0 ); } else
+ if (ISFLAG("--license")) { license(); exit ( 0 ); } else
+ if (ISFLAG("--exponential")) workFactor = 1; else
+ if (ISFLAG("--repetitive-best")) redundant(aa->name); else
+ if (ISFLAG("--repetitive-fast")) redundant(aa->name); else
+ if (ISFLAG("--fast")) blockSize100k = 1; else
+ if (ISFLAG("--best")) blockSize100k = 9; else
+ if (ISFLAG("--verbose")) verbosity++; else
+ if (ISFLAG("--help")) { usage ( progName ); exit ( 0 ); }
+ else
+ if (strncmp ( aa->name, "--", 2) == 0) {
+ fprintf ( stderr, "%s: Bad flag `%s'\n", progName, aa->name );
+ usage ( progName );
+ exit ( 1 );
+ }
+ }
+
+ if (verbosity > 4) verbosity = 4;
+ if (opMode == OM_Z && smallMode && blockSize100k > 2)
+ blockSize100k = 2;
+
+ if (opMode == OM_TEST && srcMode == SM_F2O) {
+ fprintf ( stderr, "%s: -c and -t cannot be used together.\n",
+ progName );
+ exit ( 1 );
+ }
+
+ if (srcMode == SM_F2O && numFileNames == 0)
+ srcMode = SM_I2O;
+
+ if (opMode != OM_Z) blockSize100k = 0;
+
+ if (srcMode == SM_F2F) {
+ signal (SIGINT, mySignalCatcher);
+ signal (SIGTERM, mySignalCatcher);
+# if BZ_UNIX
+ signal (SIGHUP, mySignalCatcher);
+# endif
+ }
+
+ if (opMode == OM_Z) {
+ if (srcMode == SM_I2O) {
+ compress ( NULL );
+ } else {
+ decode = True;
+ for (aa = argList; aa != NULL; aa = aa->link) {
+ if (ISFLAG("--")) { decode = False; continue; }
+ if (aa->name[0] == '-' && decode) continue;
+ numFilesProcessed++;
+ compress ( aa->name );
+ }
+ }
+ }
+ else
+
+ if (opMode == OM_UNZ) {
+ unzFailsExist = False;
+ if (srcMode == SM_I2O) {
+ uncompress ( NULL );
+ } else {
+ decode = True;
+ for (aa = argList; aa != NULL; aa = aa->link) {
+ if (ISFLAG("--")) { decode = False; continue; }
+ if (aa->name[0] == '-' && decode) continue;
+ numFilesProcessed++;
+ uncompress ( aa->name );
+ }
+ }
+ if (unzFailsExist) {
+ setExit(2);
+ exit(exitValue);
+ }
+ }
+
+ else {
+ testFailsExist = False;
+ if (srcMode == SM_I2O) {
+ testf ( NULL );
+ } else {
+ decode = True;
+ for (aa = argList; aa != NULL; aa = aa->link) {
+ if (ISFLAG("--")) { decode = False; continue; }
+ if (aa->name[0] == '-' && decode) continue;
+ numFilesProcessed++;
+ testf ( aa->name );
+ }
+ }
+ if (testFailsExist) {
+ if (noisy) {
+ fprintf ( stderr,
+ "\n"
+ "You can use the `bzip2recover' program to attempt to recover\n"
+ "data from undamaged sections of corrupted files.\n\n"
+ );
+ }
+ setExit(2);
+ exit(exitValue);
+ }
+ }
+
+ /* Free the argument list memory to mollify leak detectors
+ (eg) Purify, Checker. Serves no other useful purpose.
+ */
+ aa = argList;
+ while (aa != NULL) {
+ Cell* aa2 = aa->link;
+ if (aa->name != NULL) free(aa->name);
+ free(aa);
+ aa = aa2;
+ }
+
+ return exitValue;
+}
+
+
+/*-----------------------------------------------------------*/
+/*--- end bzip2.c ---*/
+/*-----------------------------------------------------------*/
--- /dev/null
+
+/*-------------------------------------------------------------*/
+/*--- Library top-level functions. ---*/
+/*--- bzlib.c ---*/
+/*-------------------------------------------------------------*/
+
+/* ------------------------------------------------------------------
+ This file is part of bzip2/libbzip2, a program and library for
+ lossless, block-sorting data compression.
+
+ bzip2/libbzip2 version 1.0.6 of 6 September 2010
+ Copyright (C) 1996-2010 Julian Seward <jseward@bzip.org>
+
+ Please read the WARNING, DISCLAIMER and PATENTS sections in the
+ README file.
+
+ This program is released under the terms of the license contained
+ in the file LICENSE.
+ ------------------------------------------------------------------ */
+
+/* CHANGES
+ 0.9.0 -- original version.
+ 0.9.0a/b -- no changes in this file.
+ 0.9.0c -- made zero-length BZ_FLUSH work correctly in bzCompress().
+ fixed bzWrite/bzRead to ignore zero-length requests.
+ fixed bzread to correctly handle read requests after EOF.
+ wrong parameter order in call to bzDecompressInit in
+ bzBuffToBuffDecompress. Fixed.
+*/
+
+#include "bzlib_private.h"
+
+
+/*---------------------------------------------------*/
+/*--- Compression stuff ---*/
+/*---------------------------------------------------*/
+
+
+/*---------------------------------------------------*/
+#ifndef BZ_NO_STDIO
+void BZ2_bz__AssertH__fail ( int errcode )
+{
+ fprintf(stderr,
+ "\n\nbzip2/libbzip2: internal error number %d.\n"
+ "This is a bug in bzip2/libbzip2, %s.\n"
+ "Please report it to me at: jseward@bzip.org. If this happened\n"
+ "when you were using some program which uses libbzip2 as a\n"
+ "component, you should also report this bug to the author(s)\n"
+ "of that program. Please make an effort to report this bug;\n"
+ "timely and accurate bug reports eventually lead to higher\n"
+ "quality software. Thanks. Julian Seward, 10 December 2007.\n\n",
+ errcode,
+ BZ2_bzlibVersion()
+ );
+
+ if (errcode == 1007) {
+ fprintf(stderr,
+ "\n*** A special note about internal error number 1007 ***\n"
+ "\n"
+ "Experience suggests that a common cause of i.e. 1007\n"
+ "is unreliable memory or other hardware. The 1007 assertion\n"
+ "just happens to cross-check the results of huge numbers of\n"
+ "memory reads/writes, and so acts (unintendedly) as a stress\n"
+ "test of your memory system.\n"
+ "\n"
+ "I suggest the following: try compressing the file again,\n"
+ "possibly monitoring progress in detail with the -vv flag.\n"
+ "\n"
+ "* If the error cannot be reproduced, and/or happens at different\n"
+ " points in compression, you may have a flaky memory system.\n"
+ " Try a memory-test program. I have used Memtest86\n"
+ " (www.memtest86.com). At the time of writing it is free (GPLd).\n"
+ " Memtest86 tests memory much more thorougly than your BIOSs\n"
+ " power-on test, and may find failures that the BIOS doesn't.\n"
+ "\n"
+ "* If the error can be repeatably reproduced, this is a bug in\n"
+ " bzip2, and I would very much like to hear about it. Please\n"
+ " let me know, and, ideally, save a copy of the file causing the\n"
+ " problem -- without which I will be unable to investigate it.\n"
+ "\n"
+ );
+ }
+
+ exit(3);
+}
+#endif
+
+
+/*---------------------------------------------------*/
+static
+int bz_config_ok ( void )
+{
+ if (sizeof(int) != 4) return 0;
+ if (sizeof(short) != 2) return 0;
+ if (sizeof(char) != 1) return 0;
+ return 1;
+}
+
+
+/*---------------------------------------------------*/
+static
+void* default_bzalloc ( void* opaque, Int32 items, Int32 size )
+{
+ void* v = malloc ( items * size );
+ return v;
+}
+
+static
+void default_bzfree ( void* opaque, void* addr )
+{
+ if (addr != NULL) free ( addr );
+}
+
+
+/*---------------------------------------------------*/
+static
+void prepare_new_block ( EState* s )
+{
+ Int32 i;
+ s->nblock = 0;
+ s->numZ = 0;
+ s->state_out_pos = 0;
+ BZ_INITIALISE_CRC ( s->blockCRC );
+ for (i = 0; i < 256; i++) s->inUse[i] = False;
+ s->blockNo++;
+}
+
+
+/*---------------------------------------------------*/
+static
+void init_RL ( EState* s )
+{
+ s->state_in_ch = 256;
+ s->state_in_len = 0;
+}
+
+
+static
+Bool isempty_RL ( EState* s )
+{
+ if (s->state_in_ch < 256 && s->state_in_len > 0)
+ return False; else
+ return True;
+}
+
+
+/*---------------------------------------------------*/
+int BZ_API(BZ2_bzCompressInit)
+ ( bz_stream* strm,
+ int blockSize100k,
+ int verbosity,
+ int workFactor )
+{
+ Int32 n;
+ EState* s;
+
+ if (!bz_config_ok()) return BZ_CONFIG_ERROR;
+
+ if (strm == NULL ||
+ blockSize100k < 1 || blockSize100k > 9 ||
+ workFactor < 0 || workFactor > 250)
+ return BZ_PARAM_ERROR;
+
+ if (workFactor == 0) workFactor = 30;
+ if (strm->bzalloc == NULL) strm->bzalloc = default_bzalloc;
+ if (strm->bzfree == NULL) strm->bzfree = default_bzfree;
+
+ s = BZALLOC( sizeof(EState) );
+ if (s == NULL) return BZ_MEM_ERROR;
+ s->strm = strm;
+
+ s->arr1 = NULL;
+ s->arr2 = NULL;
+ s->ftab = NULL;
+
+ n = 100000 * blockSize100k;
+ s->arr1 = BZALLOC( n * sizeof(UInt32) );
+ s->arr2 = BZALLOC( (n+BZ_N_OVERSHOOT) * sizeof(UInt32) );
+ s->ftab = BZALLOC( 65537 * sizeof(UInt32) );
+
+ if (s->arr1 == NULL || s->arr2 == NULL || s->ftab == NULL) {
+ if (s->arr1 != NULL) BZFREE(s->arr1);
+ if (s->arr2 != NULL) BZFREE(s->arr2);
+ if (s->ftab != NULL) BZFREE(s->ftab);
+ if (s != NULL) BZFREE(s);
+ return BZ_MEM_ERROR;
+ }
+
+ s->blockNo = 0;
+ s->state = BZ_S_INPUT;
+ s->mode = BZ_M_RUNNING;
+ s->combinedCRC = 0;
+ s->blockSize100k = blockSize100k;
+ s->nblockMAX = 100000 * blockSize100k - 19;
+ s->verbosity = verbosity;
+ s->workFactor = workFactor;
+
+ s->block = (UChar*)s->arr2;
+ s->mtfv = (UInt16*)s->arr1;
+ s->zbits = NULL;
+ s->ptr = (UInt32*)s->arr1;
+
+ strm->state = s;
+ strm->total_in_lo32 = 0;
+ strm->total_in_hi32 = 0;
+ strm->total_out_lo32 = 0;
+ strm->total_out_hi32 = 0;
+ init_RL ( s );
+ prepare_new_block ( s );
+ return BZ_OK;
+}
+
+
+/*---------------------------------------------------*/
+static
+void add_pair_to_block ( EState* s )
+{
+ Int32 i;
+ UChar ch = (UChar)(s->state_in_ch);
+ for (i = 0; i < s->state_in_len; i++) {
+ BZ_UPDATE_CRC( s->blockCRC, ch );
+ }
+ s->inUse[s->state_in_ch] = True;
+ switch (s->state_in_len) {
+ case 1:
+ s->block[s->nblock] = (UChar)ch; s->nblock++;
+ break;
+ case 2:
+ s->block[s->nblock] = (UChar)ch; s->nblock++;
+ s->block[s->nblock] = (UChar)ch; s->nblock++;
+ break;
+ case 3:
+ s->block[s->nblock] = (UChar)ch; s->nblock++;
+ s->block[s->nblock] = (UChar)ch; s->nblock++;
+ s->block[s->nblock] = (UChar)ch; s->nblock++;
+ break;
+ default:
+ s->inUse[s->state_in_len-4] = True;
+ s->block[s->nblock] = (UChar)ch; s->nblock++;
+ s->block[s->nblock] = (UChar)ch; s->nblock++;
+ s->block[s->nblock] = (UChar)ch; s->nblock++;
+ s->block[s->nblock] = (UChar)ch; s->nblock++;
+ s->block[s->nblock] = ((UChar)(s->state_in_len-4));
+ s->nblock++;
+ break;
+ }
+}
+
+
+/*---------------------------------------------------*/
+static
+void flush_RL ( EState* s )
+{
+ if (s->state_in_ch < 256) add_pair_to_block ( s );
+ init_RL ( s );
+}
+
+
+/*---------------------------------------------------*/
+#define ADD_CHAR_TO_BLOCK(zs,zchh0) \
+{ \
+ UInt32 zchh = (UInt32)(zchh0); \
+ /*-- fast track the common case --*/ \
+ if (zchh != zs->state_in_ch && \
+ zs->state_in_len == 1) { \
+ UChar ch = (UChar)(zs->state_in_ch); \
+ BZ_UPDATE_CRC( zs->blockCRC, ch ); \
+ zs->inUse[zs->state_in_ch] = True; \
+ zs->block[zs->nblock] = (UChar)ch; \
+ zs->nblock++; \
+ zs->state_in_ch = zchh; \
+ } \
+ else \
+ /*-- general, uncommon cases --*/ \
+ if (zchh != zs->state_in_ch || \
+ zs->state_in_len == 255) { \
+ if (zs->state_in_ch < 256) \
+ add_pair_to_block ( zs ); \
+ zs->state_in_ch = zchh; \
+ zs->state_in_len = 1; \
+ } else { \
+ zs->state_in_len++; \
+ } \
+}
+
+
+/*---------------------------------------------------*/
+static
+Bool copy_input_until_stop ( EState* s )
+{
+ Bool progress_in = False;
+
+ if (s->mode == BZ_M_RUNNING) {
+
+ /*-- fast track the common case --*/
+ while (True) {
+ /*-- block full? --*/
+ if (s->nblock >= s->nblockMAX) break;
+ /*-- no input? --*/
+ if (s->strm->avail_in == 0) break;
+ progress_in = True;
+ ADD_CHAR_TO_BLOCK ( s, (UInt32)(*((UChar*)(s->strm->next_in))) );
+ s->strm->next_in++;
+ s->strm->avail_in--;
+ s->strm->total_in_lo32++;
+ if (s->strm->total_in_lo32 == 0) s->strm->total_in_hi32++;
+ }
+
+ } else {
+
+ /*-- general, uncommon case --*/
+ while (True) {
+ /*-- block full? --*/
+ if (s->nblock >= s->nblockMAX) break;
+ /*-- no input? --*/
+ if (s->strm->avail_in == 0) break;
+ /*-- flush/finish end? --*/
+ if (s->avail_in_expect == 0) break;
+ progress_in = True;
+ ADD_CHAR_TO_BLOCK ( s, (UInt32)(*((UChar*)(s->strm->next_in))) );
+ s->strm->next_in++;
+ s->strm->avail_in--;
+ s->strm->total_in_lo32++;
+ if (s->strm->total_in_lo32 == 0) s->strm->total_in_hi32++;
+ s->avail_in_expect--;
+ }
+ }
+ return progress_in;
+}
+
+
+/*---------------------------------------------------*/
+static
+Bool copy_output_until_stop ( EState* s )
+{
+ Bool progress_out = False;
+
+ while (True) {
+
+ /*-- no output space? --*/
+ if (s->strm->avail_out == 0) break;
+
+ /*-- block done? --*/
+ if (s->state_out_pos >= s->numZ) break;
+
+ progress_out = True;
+ *(s->strm->next_out) = s->zbits[s->state_out_pos];
+ s->state_out_pos++;
+ s->strm->avail_out--;
+ s->strm->next_out++;
+ s->strm->total_out_lo32++;
+ if (s->strm->total_out_lo32 == 0) s->strm->total_out_hi32++;
+ }
+
+ return progress_out;
+}
+
+
+/*---------------------------------------------------*/
+static
+Bool handle_compress ( bz_stream* strm )
+{
+ Bool progress_in = False;
+ Bool progress_out = False;
+ EState* s = strm->state;
+
+ while (True) {
+
+ if (s->state == BZ_S_OUTPUT) {
+ progress_out |= copy_output_until_stop ( s );
+ if (s->state_out_pos < s->numZ) break;
+ if (s->mode == BZ_M_FINISHING &&
+ s->avail_in_expect == 0 &&
+ isempty_RL(s)) break;
+ prepare_new_block ( s );
+ s->state = BZ_S_INPUT;
+ if (s->mode == BZ_M_FLUSHING &&
+ s->avail_in_expect == 0 &&
+ isempty_RL(s)) break;
+ }
+
+ if (s->state == BZ_S_INPUT) {
+ progress_in |= copy_input_until_stop ( s );
+ if (s->mode != BZ_M_RUNNING && s->avail_in_expect == 0) {
+ flush_RL ( s );
+ BZ2_compressBlock ( s, (Bool)(s->mode == BZ_M_FINISHING) );
+ s->state = BZ_S_OUTPUT;
+ }
+ else
+ if (s->nblock >= s->nblockMAX) {
+ BZ2_compressBlock ( s, False );
+ s->state = BZ_S_OUTPUT;
+ }
+ else
+ if (s->strm->avail_in == 0) {
+ break;
+ }
+ }
+
+ }
+
+ return progress_in || progress_out;
+}
+
+
+/*---------------------------------------------------*/
+int BZ_API(BZ2_bzCompress) ( bz_stream *strm, int action )
+{
+ Bool progress;
+ EState* s;
+ if (strm == NULL) return BZ_PARAM_ERROR;
+ s = strm->state;
+ if (s == NULL) return BZ_PARAM_ERROR;
+ if (s->strm != strm) return BZ_PARAM_ERROR;
+
+ preswitch:
+ switch (s->mode) {
+
+ case BZ_M_IDLE:
+ return BZ_SEQUENCE_ERROR;
+
+ case BZ_M_RUNNING:
+ if (action == BZ_RUN) {
+ progress = handle_compress ( strm );
+ return progress ? BZ_RUN_OK : BZ_PARAM_ERROR;
+ }
+ else
+ if (action == BZ_FLUSH) {
+ s->avail_in_expect = strm->avail_in;
+ s->mode = BZ_M_FLUSHING;
+ goto preswitch;
+ }
+ else
+ if (action == BZ_FINISH) {
+ s->avail_in_expect = strm->avail_in;
+ s->mode = BZ_M_FINISHING;
+ goto preswitch;
+ }
+ else
+ return BZ_PARAM_ERROR;
+
+ case BZ_M_FLUSHING:
+ if (action != BZ_FLUSH) return BZ_SEQUENCE_ERROR;
+ if (s->avail_in_expect != s->strm->avail_in)
+ return BZ_SEQUENCE_ERROR;
+ progress = handle_compress ( strm );
+ if (s->avail_in_expect > 0 || !isempty_RL(s) ||
+ s->state_out_pos < s->numZ) return BZ_FLUSH_OK;
+ s->mode = BZ_M_RUNNING;
+ return BZ_RUN_OK;
+
+ case BZ_M_FINISHING:
+ if (action != BZ_FINISH) return BZ_SEQUENCE_ERROR;
+ if (s->avail_in_expect != s->strm->avail_in)
+ return BZ_SEQUENCE_ERROR;
+ progress = handle_compress ( strm );
+ if (!progress) return BZ_SEQUENCE_ERROR;
+ if (s->avail_in_expect > 0 || !isempty_RL(s) ||
+ s->state_out_pos < s->numZ) return BZ_FINISH_OK;
+ s->mode = BZ_M_IDLE;
+ return BZ_STREAM_END;
+ }
+ return BZ_OK; /*--not reached--*/
+}
+
+
+/*---------------------------------------------------*/
+int BZ_API(BZ2_bzCompressEnd) ( bz_stream *strm )
+{
+ EState* s;
+ if (strm == NULL) return BZ_PARAM_ERROR;
+ s = strm->state;
+ if (s == NULL) return BZ_PARAM_ERROR;
+ if (s->strm != strm) return BZ_PARAM_ERROR;
+
+ if (s->arr1 != NULL) BZFREE(s->arr1);
+ if (s->arr2 != NULL) BZFREE(s->arr2);
+ if (s->ftab != NULL) BZFREE(s->ftab);
+ BZFREE(strm->state);
+
+ strm->state = NULL;
+
+ return BZ_OK;
+}
+
+
+/*---------------------------------------------------*/
+/*--- Decompression stuff ---*/
+/*---------------------------------------------------*/
+
+/*---------------------------------------------------*/
+int BZ_API(BZ2_bzDecompressInit)
+ ( bz_stream* strm,
+ int verbosity,
+ int small )
+{
+ DState* s;
+
+ if (!bz_config_ok()) return BZ_CONFIG_ERROR;
+
+ if (strm == NULL) return BZ_PARAM_ERROR;
+ if (small != 0 && small != 1) return BZ_PARAM_ERROR;
+ if (verbosity < 0 || verbosity > 4) return BZ_PARAM_ERROR;
+
+ if (strm->bzalloc == NULL) strm->bzalloc = default_bzalloc;
+ if (strm->bzfree == NULL) strm->bzfree = default_bzfree;
+
+ s = BZALLOC( sizeof(DState) );
+ if (s == NULL) return BZ_MEM_ERROR;
+ s->strm = strm;
+ strm->state = s;
+ s->state = BZ_X_MAGIC_1;
+ s->bsLive = 0;
+ s->bsBuff = 0;
+ s->calculatedCombinedCRC = 0;
+ strm->total_in_lo32 = 0;
+ strm->total_in_hi32 = 0;
+ strm->total_out_lo32 = 0;
+ strm->total_out_hi32 = 0;
+ s->smallDecompress = (Bool)small;
+ s->ll4 = NULL;
+ s->ll16 = NULL;
+ s->tt = NULL;
+ s->currBlockNo = 0;
+ s->verbosity = verbosity;
+
+ return BZ_OK;
+}
+
+
+/*---------------------------------------------------*/
+/* Return True iff data corruption is discovered.
+ Returns False if there is no problem.
+*/
+static
+Bool unRLE_obuf_to_output_FAST ( DState* s )
+{
+ UChar k1;
+
+ if (s->blockRandomised) {
+
+ while (True) {
+ /* try to finish existing run */
+ while (True) {
+ if (s->strm->avail_out == 0) return False;
+ if (s->state_out_len == 0) break;
+ *( (UChar*)(s->strm->next_out) ) = s->state_out_ch;
+ BZ_UPDATE_CRC ( s->calculatedBlockCRC, s->state_out_ch );
+ s->state_out_len--;
+ s->strm->next_out++;
+ s->strm->avail_out--;
+ s->strm->total_out_lo32++;
+ if (s->strm->total_out_lo32 == 0) s->strm->total_out_hi32++;
+ }
+
+ /* can a new run be started? */
+ if (s->nblock_used == s->save_nblock+1) return False;
+
+ /* Only caused by corrupt data stream? */
+ if (s->nblock_used > s->save_nblock+1)
+ return True;
+
+ s->state_out_len = 1;
+ s->state_out_ch = s->k0;
+ BZ_GET_FAST(k1); BZ_RAND_UPD_MASK;
+ k1 ^= BZ_RAND_MASK; s->nblock_used++;
+ if (s->nblock_used == s->save_nblock+1) continue;
+ if (k1 != s->k0) { s->k0 = k1; continue; };
+
+ s->state_out_len = 2;
+ BZ_GET_FAST(k1); BZ_RAND_UPD_MASK;
+ k1 ^= BZ_RAND_MASK; s->nblock_used++;
+ if (s->nblock_used == s->save_nblock+1) continue;
+ if (k1 != s->k0) { s->k0 = k1; continue; };
+
+ s->state_out_len = 3;
+ BZ_GET_FAST(k1); BZ_RAND_UPD_MASK;
+ k1 ^= BZ_RAND_MASK; s->nblock_used++;
+ if (s->nblock_used == s->save_nblock+1) continue;
+ if (k1 != s->k0) { s->k0 = k1; continue; };
+
+ BZ_GET_FAST(k1); BZ_RAND_UPD_MASK;
+ k1 ^= BZ_RAND_MASK; s->nblock_used++;
+ s->state_out_len = ((Int32)k1) + 4;
+ BZ_GET_FAST(s->k0); BZ_RAND_UPD_MASK;
+ s->k0 ^= BZ_RAND_MASK; s->nblock_used++;
+ }
+
+ } else {
+
+ /* restore */
+ UInt32 c_calculatedBlockCRC = s->calculatedBlockCRC;
+ UChar c_state_out_ch = s->state_out_ch;
+ Int32 c_state_out_len = s->state_out_len;
+ Int32 c_nblock_used = s->nblock_used;
+ Int32 c_k0 = s->k0;
+ UInt32* c_tt = s->tt;
+ UInt32 c_tPos = s->tPos;
+ char* cs_next_out = s->strm->next_out;
+ unsigned int cs_avail_out = s->strm->avail_out;
+ Int32 ro_blockSize100k = s->blockSize100k;
+ /* end restore */
+
+ UInt32 avail_out_INIT = cs_avail_out;
+ Int32 s_save_nblockPP = s->save_nblock+1;
+ unsigned int total_out_lo32_old;
+
+ while (True) {
+
+ /* try to finish existing run */
+ if (c_state_out_len > 0) {
+ while (True) {
+ if (cs_avail_out == 0) goto return_notr;
+ if (c_state_out_len == 1) break;
+ *( (UChar*)(cs_next_out) ) = c_state_out_ch;
+ BZ_UPDATE_CRC ( c_calculatedBlockCRC, c_state_out_ch );
+ c_state_out_len--;
+ cs_next_out++;
+ cs_avail_out--;
+ }
+ s_state_out_len_eq_one:
+ {
+ if (cs_avail_out == 0) {
+ c_state_out_len = 1; goto return_notr;
+ };
+ *( (UChar*)(cs_next_out) ) = c_state_out_ch;
+ BZ_UPDATE_CRC ( c_calculatedBlockCRC, c_state_out_ch );
+ cs_next_out++;
+ cs_avail_out--;
+ }
+ }
+ /* Only caused by corrupt data stream? */
+ if (c_nblock_used > s_save_nblockPP)
+ return True;
+
+ /* can a new run be started? */
+ if (c_nblock_used == s_save_nblockPP) {
+ c_state_out_len = 0; goto return_notr;
+ };
+ c_state_out_ch = c_k0;
+ BZ_GET_FAST_C(k1); c_nblock_used++;
+ if (k1 != c_k0) {
+ c_k0 = k1; goto s_state_out_len_eq_one;
+ };
+ if (c_nblock_used == s_save_nblockPP)
+ goto s_state_out_len_eq_one;
+
+ c_state_out_len = 2;
+ BZ_GET_FAST_C(k1); c_nblock_used++;
+ if (c_nblock_used == s_save_nblockPP) continue;
+ if (k1 != c_k0) { c_k0 = k1; continue; };
+
+ c_state_out_len = 3;
+ BZ_GET_FAST_C(k1); c_nblock_used++;
+ if (c_nblock_used == s_save_nblockPP) continue;
+ if (k1 != c_k0) { c_k0 = k1; continue; };
+
+ BZ_GET_FAST_C(k1); c_nblock_used++;
+ c_state_out_len = ((Int32)k1) + 4;
+ BZ_GET_FAST_C(c_k0); c_nblock_used++;
+ }
+
+ return_notr:
+ total_out_lo32_old = s->strm->total_out_lo32;
+ s->strm->total_out_lo32 += (avail_out_INIT - cs_avail_out);
+ if (s->strm->total_out_lo32 < total_out_lo32_old)
+ s->strm->total_out_hi32++;
+
+ /* save */
+ s->calculatedBlockCRC = c_calculatedBlockCRC;
+ s->state_out_ch = c_state_out_ch;
+ s->state_out_len = c_state_out_len;
+ s->nblock_used = c_nblock_used;
+ s->k0 = c_k0;
+ s->tt = c_tt;
+ s->tPos = c_tPos;
+ s->strm->next_out = cs_next_out;
+ s->strm->avail_out = cs_avail_out;
+ /* end save */
+ }
+ return False;
+}
+
+
+
+/*---------------------------------------------------*/
+__inline__ Int32 BZ2_indexIntoF ( Int32 indx, Int32 *cftab )
+{
+ Int32 nb, na, mid;
+ nb = 0;
+ na = 256;
+ do {
+ mid = (nb + na) >> 1;
+ if (indx >= cftab[mid]) nb = mid; else na = mid;
+ }
+ while (na - nb != 1);
+ return nb;
+}
+
+
+/*---------------------------------------------------*/
+/* Return True iff data corruption is discovered.
+ Returns False if there is no problem.
+*/
+static
+Bool unRLE_obuf_to_output_SMALL ( DState* s )
+{
+ UChar k1;
+
+ if (s->blockRandomised) {
+
+ while (True) {
+ /* try to finish existing run */
+ while (True) {
+ if (s->strm->avail_out == 0) return False;
+ if (s->state_out_len == 0) break;
+ *( (UChar*)(s->strm->next_out) ) = s->state_out_ch;
+ BZ_UPDATE_CRC ( s->calculatedBlockCRC, s->state_out_ch );
+ s->state_out_len--;
+ s->strm->next_out++;
+ s->strm->avail_out--;
+ s->strm->total_out_lo32++;
+ if (s->strm->total_out_lo32 == 0) s->strm->total_out_hi32++;
+ }
+
+ /* can a new run be started? */
+ if (s->nblock_used == s->save_nblock+1) return False;
+
+ /* Only caused by corrupt data stream? */
+ if (s->nblock_used > s->save_nblock+1)
+ return True;
+
+ s->state_out_len = 1;
+ s->state_out_ch = s->k0;
+ BZ_GET_SMALL(k1); BZ_RAND_UPD_MASK;
+ k1 ^= BZ_RAND_MASK; s->nblock_used++;
+ if (s->nblock_used == s->save_nblock+1) continue;
+ if (k1 != s->k0) { s->k0 = k1; continue; };
+
+ s->state_out_len = 2;
+ BZ_GET_SMALL(k1); BZ_RAND_UPD_MASK;
+ k1 ^= BZ_RAND_MASK; s->nblock_used++;
+ if (s->nblock_used == s->save_nblock+1) continue;
+ if (k1 != s->k0) { s->k0 = k1; continue; };
+
+ s->state_out_len = 3;
+ BZ_GET_SMALL(k1); BZ_RAND_UPD_MASK;
+ k1 ^= BZ_RAND_MASK; s->nblock_used++;
+ if (s->nblock_used == s->save_nblock+1) continue;
+ if (k1 != s->k0) { s->k0 = k1; continue; };
+
+ BZ_GET_SMALL(k1); BZ_RAND_UPD_MASK;
+ k1 ^= BZ_RAND_MASK; s->nblock_used++;
+ s->state_out_len = ((Int32)k1) + 4;
+ BZ_GET_SMALL(s->k0); BZ_RAND_UPD_MASK;
+ s->k0 ^= BZ_RAND_MASK; s->nblock_used++;
+ }
+
+ } else {
+
+ while (True) {
+ /* try to finish existing run */
+ while (True) {
+ if (s->strm->avail_out == 0) return False;
+ if (s->state_out_len == 0) break;
+ *( (UChar*)(s->strm->next_out) ) = s->state_out_ch;
+ BZ_UPDATE_CRC ( s->calculatedBlockCRC, s->state_out_ch );
+ s->state_out_len--;
+ s->strm->next_out++;
+ s->strm->avail_out--;
+ s->strm->total_out_lo32++;
+ if (s->strm->total_out_lo32 == 0) s->strm->total_out_hi32++;
+ }
+
+ /* can a new run be started? */
+ if (s->nblock_used == s->save_nblock+1) return False;
+
+ /* Only caused by corrupt data stream? */
+ if (s->nblock_used > s->save_nblock+1)
+ return True;
+
+ s->state_out_len = 1;
+ s->state_out_ch = s->k0;
+ BZ_GET_SMALL(k1); s->nblock_used++;
+ if (s->nblock_used == s->save_nblock+1) continue;
+ if (k1 != s->k0) { s->k0 = k1; continue; };
+
+ s->state_out_len = 2;
+ BZ_GET_SMALL(k1); s->nblock_used++;
+ if (s->nblock_used == s->save_nblock+1) continue;
+ if (k1 != s->k0) { s->k0 = k1; continue; };
+
+ s->state_out_len = 3;
+ BZ_GET_SMALL(k1); s->nblock_used++;
+ if (s->nblock_used == s->save_nblock+1) continue;
+ if (k1 != s->k0) { s->k0 = k1; continue; };
+
+ BZ_GET_SMALL(k1); s->nblock_used++;
+ s->state_out_len = ((Int32)k1) + 4;
+ BZ_GET_SMALL(s->k0); s->nblock_used++;
+ }
+
+ }
+}
+
+
+/*---------------------------------------------------*/
+int BZ_API(BZ2_bzDecompress) ( bz_stream *strm )
+{
+ Bool corrupt;
+ DState* s;
+ if (strm == NULL) return BZ_PARAM_ERROR;
+ s = strm->state;
+ if (s == NULL) return BZ_PARAM_ERROR;
+ if (s->strm != strm) return BZ_PARAM_ERROR;
+
+ while (True) {
+ if (s->state == BZ_X_IDLE) return BZ_SEQUENCE_ERROR;
+ if (s->state == BZ_X_OUTPUT) {
+ if (s->smallDecompress)
+ corrupt = unRLE_obuf_to_output_SMALL ( s ); else
+ corrupt = unRLE_obuf_to_output_FAST ( s );
+ if (corrupt) return BZ_DATA_ERROR;
+ if (s->nblock_used == s->save_nblock+1 && s->state_out_len == 0) {
+ BZ_FINALISE_CRC ( s->calculatedBlockCRC );
+ if (s->verbosity >= 3)
+ VPrintf2 ( " {0x%08x, 0x%08x}", s->storedBlockCRC,
+ s->calculatedBlockCRC );
+ if (s->verbosity >= 2) VPrintf0 ( "]" );
+ if (s->calculatedBlockCRC != s->storedBlockCRC)
+ return BZ_DATA_ERROR;
+ s->calculatedCombinedCRC
+ = (s->calculatedCombinedCRC << 1) |
+ (s->calculatedCombinedCRC >> 31);
+ s->calculatedCombinedCRC ^= s->calculatedBlockCRC;
+ s->state = BZ_X_BLKHDR_1;
+ } else {
+ return BZ_OK;
+ }
+ }
+ if (s->state >= BZ_X_MAGIC_1) {
+ Int32 r = BZ2_decompress ( s );
+ if (r == BZ_STREAM_END) {
+ if (s->verbosity >= 3)
+ VPrintf2 ( "\n combined CRCs: stored = 0x%08x, computed = 0x%08x",
+ s->storedCombinedCRC, s->calculatedCombinedCRC );
+ if (s->calculatedCombinedCRC != s->storedCombinedCRC)
+ return BZ_DATA_ERROR;
+ return r;
+ }
+ if (s->state != BZ_X_OUTPUT) return r;
+ }
+ }
+
+ AssertH ( 0, 6001 );
+
+ return 0; /*NOTREACHED*/
+}
+
+
+/*---------------------------------------------------*/
+int BZ_API(BZ2_bzDecompressEnd) ( bz_stream *strm )
+{
+ DState* s;
+ if (strm == NULL) return BZ_PARAM_ERROR;
+ s = strm->state;
+ if (s == NULL) return BZ_PARAM_ERROR;
+ if (s->strm != strm) return BZ_PARAM_ERROR;
+
+ if (s->tt != NULL) BZFREE(s->tt);
+ if (s->ll16 != NULL) BZFREE(s->ll16);
+ if (s->ll4 != NULL) BZFREE(s->ll4);
+
+ BZFREE(strm->state);
+ strm->state = NULL;
+
+ return BZ_OK;
+}
+
+
+#ifndef BZ_NO_STDIO
+/*---------------------------------------------------*/
+/*--- File I/O stuff ---*/
+/*---------------------------------------------------*/
+
+#define BZ_SETERR(eee) \
+{ \
+ if (bzerror != NULL) *bzerror = eee; \
+ if (bzf != NULL) bzf->lastErr = eee; \
+}
+
+typedef
+ struct {
+ FILE* handle;
+ Char buf[BZ_MAX_UNUSED];
+ Int32 bufN;
+ Bool writing;
+ bz_stream strm;
+ Int32 lastErr;
+ Bool initialisedOk;
+ }
+ bzFile;
+
+
+/*---------------------------------------------*/
+static Bool myfeof ( FILE* f )
+{
+ Int32 c = fgetc ( f );
+ if (c == EOF) return True;
+ ungetc ( c, f );
+ return False;
+}
+
+
+/*---------------------------------------------------*/
+BZFILE* BZ_API(BZ2_bzWriteOpen)
+ ( int* bzerror,
+ FILE* f,
+ int blockSize100k,
+ int verbosity,
+ int workFactor )
+{
+ Int32 ret;
+ bzFile* bzf = NULL;
+
+ BZ_SETERR(BZ_OK);
+
+ if (f == NULL ||
+ (blockSize100k < 1 || blockSize100k > 9) ||
+ (workFactor < 0 || workFactor > 250) ||
+ (verbosity < 0 || verbosity > 4))
+ { BZ_SETERR(BZ_PARAM_ERROR); return NULL; };
+
+ if (ferror(f))
+ { BZ_SETERR(BZ_IO_ERROR); return NULL; };
+
+ bzf = malloc ( sizeof(bzFile) );
+ if (bzf == NULL)
+ { BZ_SETERR(BZ_MEM_ERROR); return NULL; };
+
+ BZ_SETERR(BZ_OK);
+ bzf->initialisedOk = False;
+ bzf->bufN = 0;
+ bzf->handle = f;
+ bzf->writing = True;
+ bzf->strm.bzalloc = NULL;
+ bzf->strm.bzfree = NULL;
+ bzf->strm.opaque = NULL;
+
+ if (workFactor == 0) workFactor = 30;
+ ret = BZ2_bzCompressInit ( &(bzf->strm), blockSize100k,
+ verbosity, workFactor );
+ if (ret != BZ_OK)
+ { BZ_SETERR(ret); free(bzf); return NULL; };
+
+ bzf->strm.avail_in = 0;
+ bzf->initialisedOk = True;
+ return bzf;
+}
+
+
+
+/*---------------------------------------------------*/
+void BZ_API(BZ2_bzWrite)
+ ( int* bzerror,
+ BZFILE* b,
+ void* buf,
+ int len )
+{
+ Int32 n, n2, ret;
+ bzFile* bzf = (bzFile*)b;
+
+ BZ_SETERR(BZ_OK);
+ if (bzf == NULL || buf == NULL || len < 0)
+ { BZ_SETERR(BZ_PARAM_ERROR); return; };
+ if (!(bzf->writing))
+ { BZ_SETERR(BZ_SEQUENCE_ERROR); return; };
+ if (ferror(bzf->handle))
+ { BZ_SETERR(BZ_IO_ERROR); return; };
+
+ if (len == 0)
+ { BZ_SETERR(BZ_OK); return; };
+
+ bzf->strm.avail_in = len;
+ bzf->strm.next_in = buf;
+
+ while (True) {
+ bzf->strm.avail_out = BZ_MAX_UNUSED;
+ bzf->strm.next_out = bzf->buf;
+ ret = BZ2_bzCompress ( &(bzf->strm), BZ_RUN );
+ if (ret != BZ_RUN_OK)
+ { BZ_SETERR(ret); return; };
+
+ if (bzf->strm.avail_out < BZ_MAX_UNUSED) {
+ n = BZ_MAX_UNUSED - bzf->strm.avail_out;
+ n2 = fwrite ( (void*)(bzf->buf), sizeof(UChar),
+ n, bzf->handle );
+ if (n != n2 || ferror(bzf->handle))
+ { BZ_SETERR(BZ_IO_ERROR); return; };
+ }
+
+ if (bzf->strm.avail_in == 0)
+ { BZ_SETERR(BZ_OK); return; };
+ }
+}
+
+
+/*---------------------------------------------------*/
+void BZ_API(BZ2_bzWriteClose)
+ ( int* bzerror,
+ BZFILE* b,
+ int abandon,
+ unsigned int* nbytes_in,
+ unsigned int* nbytes_out )
+{
+ BZ2_bzWriteClose64 ( bzerror, b, abandon,
+ nbytes_in, NULL, nbytes_out, NULL );
+}
+
+
+void BZ_API(BZ2_bzWriteClose64)
+ ( int* bzerror,
+ BZFILE* b,
+ int abandon,
+ unsigned int* nbytes_in_lo32,
+ unsigned int* nbytes_in_hi32,
+ unsigned int* nbytes_out_lo32,
+ unsigned int* nbytes_out_hi32 )
+{
+ Int32 n, n2, ret;
+ bzFile* bzf = (bzFile*)b;
+
+ if (bzf == NULL)
+ { BZ_SETERR(BZ_OK); return; };
+ if (!(bzf->writing))
+ { BZ_SETERR(BZ_SEQUENCE_ERROR); return; };
+ if (ferror(bzf->handle))
+ { BZ_SETERR(BZ_IO_ERROR); return; };
+
+ if (nbytes_in_lo32 != NULL) *nbytes_in_lo32 = 0;
+ if (nbytes_in_hi32 != NULL) *nbytes_in_hi32 = 0;
+ if (nbytes_out_lo32 != NULL) *nbytes_out_lo32 = 0;
+ if (nbytes_out_hi32 != NULL) *nbytes_out_hi32 = 0;
+
+ if ((!abandon) && bzf->lastErr == BZ_OK) {
+ while (True) {
+ bzf->strm.avail_out = BZ_MAX_UNUSED;
+ bzf->strm.next_out = bzf->buf;
+ ret = BZ2_bzCompress ( &(bzf->strm), BZ_FINISH );
+ if (ret != BZ_FINISH_OK && ret != BZ_STREAM_END)
+ { BZ_SETERR(ret); return; };
+
+ if (bzf->strm.avail_out < BZ_MAX_UNUSED) {
+ n = BZ_MAX_UNUSED - bzf->strm.avail_out;
+ n2 = fwrite ( (void*)(bzf->buf), sizeof(UChar),
+ n, bzf->handle );
+ if (n != n2 || ferror(bzf->handle))
+ { BZ_SETERR(BZ_IO_ERROR); return; };
+ }
+
+ if (ret == BZ_STREAM_END) break;
+ }
+ }
+
+ if ( !abandon && !ferror ( bzf->handle ) ) {
+ fflush ( bzf->handle );
+ if (ferror(bzf->handle))
+ { BZ_SETERR(BZ_IO_ERROR); return; };
+ }
+
+ if (nbytes_in_lo32 != NULL)
+ *nbytes_in_lo32 = bzf->strm.total_in_lo32;
+ if (nbytes_in_hi32 != NULL)
+ *nbytes_in_hi32 = bzf->strm.total_in_hi32;
+ if (nbytes_out_lo32 != NULL)
+ *nbytes_out_lo32 = bzf->strm.total_out_lo32;
+ if (nbytes_out_hi32 != NULL)
+ *nbytes_out_hi32 = bzf->strm.total_out_hi32;
+
+ BZ_SETERR(BZ_OK);
+ BZ2_bzCompressEnd ( &(bzf->strm) );
+ free ( bzf );
+}
+
+
+/*---------------------------------------------------*/
+BZFILE* BZ_API(BZ2_bzReadOpen)
+ ( int* bzerror,
+ FILE* f,
+ int verbosity,
+ int small,
+ void* unused,
+ int nUnused )
+{
+ bzFile* bzf = NULL;
+ int ret;
+
+ BZ_SETERR(BZ_OK);
+
+ if (f == NULL ||
+ (small != 0 && small != 1) ||
+ (verbosity < 0 || verbosity > 4) ||
+ (unused == NULL && nUnused != 0) ||
+ (unused != NULL && (nUnused < 0 || nUnused > BZ_MAX_UNUSED)))
+ { BZ_SETERR(BZ_PARAM_ERROR); return NULL; };
+
+ if (ferror(f))
+ { BZ_SETERR(BZ_IO_ERROR); return NULL; };
+
+ bzf = malloc ( sizeof(bzFile) );
+ if (bzf == NULL)
+ { BZ_SETERR(BZ_MEM_ERROR); return NULL; };
+
+ BZ_SETERR(BZ_OK);
+
+ bzf->initialisedOk = False;
+ bzf->handle = f;
+ bzf->bufN = 0;
+ bzf->writing = False;
+ bzf->strm.bzalloc = NULL;
+ bzf->strm.bzfree = NULL;
+ bzf->strm.opaque = NULL;
+
+ while (nUnused > 0) {
+ bzf->buf[bzf->bufN] = *((UChar*)(unused)); bzf->bufN++;
+ unused = ((void*)( 1 + ((UChar*)(unused)) ));
+ nUnused--;
+ }
+
+ ret = BZ2_bzDecompressInit ( &(bzf->strm), verbosity, small );
+ if (ret != BZ_OK)
+ { BZ_SETERR(ret); free(bzf); return NULL; };
+
+ bzf->strm.avail_in = bzf->bufN;
+ bzf->strm.next_in = bzf->buf;
+
+ bzf->initialisedOk = True;
+ return bzf;
+}
+
+
+/*---------------------------------------------------*/
+void BZ_API(BZ2_bzReadClose) ( int *bzerror, BZFILE *b )
+{
+ bzFile* bzf = (bzFile*)b;
+
+ BZ_SETERR(BZ_OK);
+ if (bzf == NULL)
+ { BZ_SETERR(BZ_OK); return; };
+
+ if (bzf->writing)
+ { BZ_SETERR(BZ_SEQUENCE_ERROR); return; };
+
+ if (bzf->initialisedOk)
+ (void)BZ2_bzDecompressEnd ( &(bzf->strm) );
+ free ( bzf );
+}
+
+
+/*---------------------------------------------------*/
+int BZ_API(BZ2_bzRead)
+ ( int* bzerror,
+ BZFILE* b,
+ void* buf,
+ int len )
+{
+ Int32 n, ret;
+ bzFile* bzf = (bzFile*)b;
+
+ BZ_SETERR(BZ_OK);
+
+ if (bzf == NULL || buf == NULL || len < 0)
+ { BZ_SETERR(BZ_PARAM_ERROR); return 0; };
+
+ if (bzf->writing)
+ { BZ_SETERR(BZ_SEQUENCE_ERROR); return 0; };
+
+ if (len == 0)
+ { BZ_SETERR(BZ_OK); return 0; };
+
+ bzf->strm.avail_out = len;
+ bzf->strm.next_out = buf;
+
+ while (True) {
+
+ if (ferror(bzf->handle))
+ { BZ_SETERR(BZ_IO_ERROR); return 0; };
+
+ if (bzf->strm.avail_in == 0 && !myfeof(bzf->handle)) {
+ n = fread ( bzf->buf, sizeof(UChar),
+ BZ_MAX_UNUSED, bzf->handle );
+ if (ferror(bzf->handle))
+ { BZ_SETERR(BZ_IO_ERROR); return 0; };
+ bzf->bufN = n;
+ bzf->strm.avail_in = bzf->bufN;
+ bzf->strm.next_in = bzf->buf;
+ }
+
+ ret = BZ2_bzDecompress ( &(bzf->strm) );
+
+ if (ret != BZ_OK && ret != BZ_STREAM_END)
+ { BZ_SETERR(ret); return 0; };
+
+ if (ret == BZ_OK && myfeof(bzf->handle) &&
+ bzf->strm.avail_in == 0 && bzf->strm.avail_out > 0)
+ { BZ_SETERR(BZ_UNEXPECTED_EOF); return 0; };
+
+ if (ret == BZ_STREAM_END)
+ { BZ_SETERR(BZ_STREAM_END);
+ return len - bzf->strm.avail_out; };
+ if (bzf->strm.avail_out == 0)
+ { BZ_SETERR(BZ_OK); return len; };
+
+ }
+
+ return 0; /*not reached*/
+}
+
+
+/*---------------------------------------------------*/
+void BZ_API(BZ2_bzReadGetUnused)
+ ( int* bzerror,
+ BZFILE* b,
+ void** unused,
+ int* nUnused )
+{
+ bzFile* bzf = (bzFile*)b;
+ if (bzf == NULL)
+ { BZ_SETERR(BZ_PARAM_ERROR); return; };
+ if (bzf->lastErr != BZ_STREAM_END)
+ { BZ_SETERR(BZ_SEQUENCE_ERROR); return; };
+ if (unused == NULL || nUnused == NULL)
+ { BZ_SETERR(BZ_PARAM_ERROR); return; };
+
+ BZ_SETERR(BZ_OK);
+ *nUnused = bzf->strm.avail_in;
+ *unused = bzf->strm.next_in;
+}
+#endif
+
+
+/*---------------------------------------------------*/
+/*--- Misc convenience stuff ---*/
+/*---------------------------------------------------*/
+
+/*---------------------------------------------------*/
+int BZ_API(BZ2_bzBuffToBuffCompress)
+ ( char* dest,
+ unsigned int* destLen,
+ char* source,
+ unsigned int sourceLen,
+ int blockSize100k,
+ int verbosity,
+ int workFactor )
+{
+ bz_stream strm;
+ int ret;
+
+ if (dest == NULL || destLen == NULL ||
+ source == NULL ||
+ blockSize100k < 1 || blockSize100k > 9 ||
+ verbosity < 0 || verbosity > 4 ||
+ workFactor < 0 || workFactor > 250)
+ return BZ_PARAM_ERROR;
+
+ if (workFactor == 0) workFactor = 30;
+ strm.bzalloc = NULL;
+ strm.bzfree = NULL;
+ strm.opaque = NULL;
+ ret = BZ2_bzCompressInit ( &strm, blockSize100k,
+ verbosity, workFactor );
+ if (ret != BZ_OK) return ret;
+
+ strm.next_in = source;
+ strm.next_out = dest;
+ strm.avail_in = sourceLen;
+ strm.avail_out = *destLen;
+
+ ret = BZ2_bzCompress ( &strm, BZ_FINISH );
+ if (ret == BZ_FINISH_OK) goto output_overflow;
+ if (ret != BZ_STREAM_END) goto errhandler;
+
+ /* normal termination */
+ *destLen -= strm.avail_out;
+ BZ2_bzCompressEnd ( &strm );
+ return BZ_OK;
+
+ output_overflow:
+ BZ2_bzCompressEnd ( &strm );
+ return BZ_OUTBUFF_FULL;
+
+ errhandler:
+ BZ2_bzCompressEnd ( &strm );
+ return ret;
+}
+
+
+/*---------------------------------------------------*/
+int BZ_API(BZ2_bzBuffToBuffDecompress)
+ ( char* dest,
+ unsigned int* destLen,
+ char* source,
+ unsigned int sourceLen,
+ int small,
+ int verbosity )
+{
+ bz_stream strm;
+ int ret;
+
+ if (dest == NULL || destLen == NULL ||
+ source == NULL ||
+ (small != 0 && small != 1) ||
+ verbosity < 0 || verbosity > 4)
+ return BZ_PARAM_ERROR;
+
+ strm.bzalloc = NULL;
+ strm.bzfree = NULL;
+ strm.opaque = NULL;
+ ret = BZ2_bzDecompressInit ( &strm, verbosity, small );
+ if (ret != BZ_OK) return ret;
+
+ strm.next_in = source;
+ strm.next_out = dest;
+ strm.avail_in = sourceLen;
+ strm.avail_out = *destLen;
+
+ ret = BZ2_bzDecompress ( &strm );
+ if (ret == BZ_OK) goto output_overflow_or_eof;
+ if (ret != BZ_STREAM_END) goto errhandler;
+
+ /* normal termination */
+ *destLen -= strm.avail_out;
+ BZ2_bzDecompressEnd ( &strm );
+ return BZ_OK;
+
+ output_overflow_or_eof:
+ if (strm.avail_out > 0) {
+ BZ2_bzDecompressEnd ( &strm );
+ return BZ_UNEXPECTED_EOF;
+ } else {
+ BZ2_bzDecompressEnd ( &strm );
+ return BZ_OUTBUFF_FULL;
+ };
+
+ errhandler:
+ BZ2_bzDecompressEnd ( &strm );
+ return ret;
+}
+
+
+/*---------------------------------------------------*/
+/*--
+ Code contributed by Yoshioka Tsuneo (tsuneo@rr.iij4u.or.jp)
+ to support better zlib compatibility.
+ This code is not _officially_ part of libbzip2 (yet);
+ I haven't tested it, documented it, or considered the
+ threading-safeness of it.
+ If this code breaks, please contact both Yoshioka and me.
+--*/
+/*---------------------------------------------------*/
+
+/*---------------------------------------------------*/
+/*--
+ return version like "0.9.5d, 4-Sept-1999".
+--*/
+const char * BZ_API(BZ2_bzlibVersion)(void)
+{
+ return BZ_VERSION;
+}
+
+
+#ifndef BZ_NO_STDIO
+/*---------------------------------------------------*/
+
+#if defined(_WIN32) || defined(OS2) || defined(MSDOS)
+# include <fcntl.h>
+# include <io.h>
+# define SET_BINARY_MODE(file) setmode(fileno(file),O_BINARY)
+#else
+# define SET_BINARY_MODE(file)
+#endif
+static
+BZFILE * bzopen_or_bzdopen
+ ( const char *path, /* no use when bzdopen */
+ int fd, /* no use when bzdopen */
+ const char *mode,
+ int open_mode) /* bzopen: 0, bzdopen:1 */
+{
+ int bzerr;
+ char unused[BZ_MAX_UNUSED];
+ int blockSize100k = 9;
+ int writing = 0;
+ char mode2[10] = "";
+ FILE *fp = NULL;
+ BZFILE *bzfp = NULL;
+ int verbosity = 0;
+ int workFactor = 30;
+ int smallMode = 0;
+ int nUnused = 0;
+
+ if (mode == NULL) return NULL;
+ while (*mode) {
+ switch (*mode) {
+ case 'r':
+ writing = 0; break;
+ case 'w':
+ writing = 1; break;
+ case 's':
+ smallMode = 1; break;
+ default:
+ if (isdigit((int)(*mode))) {
+ blockSize100k = *mode-BZ_HDR_0;
+ }
+ }
+ mode++;
+ }
+ strcat(mode2, writing ? "w" : "r" );
+ strcat(mode2,"b"); /* binary mode */
+
+ if (open_mode==0) {
+ if (path==NULL || strcmp(path,"")==0) {
+ fp = (writing ? stdout : stdin);
+ SET_BINARY_MODE(fp);
+ } else {
+ fp = fopen(path,mode2);
+ }
+ } else {
+#ifdef BZ_STRICT_ANSI
+ fp = NULL;
+#else
+ fp = fdopen(fd,mode2);
+#endif
+ }
+ if (fp == NULL) return NULL;
+
+ if (writing) {
+ /* Guard against total chaos and anarchy -- JRS */
+ if (blockSize100k < 1) blockSize100k = 1;
+ if (blockSize100k > 9) blockSize100k = 9;
+ bzfp = BZ2_bzWriteOpen(&bzerr,fp,blockSize100k,
+ verbosity,workFactor);
+ } else {
+ bzfp = BZ2_bzReadOpen(&bzerr,fp,verbosity,smallMode,
+ unused,nUnused);
+ }
+ if (bzfp == NULL) {
+ if (fp != stdin && fp != stdout) fclose(fp);
+ return NULL;
+ }
+ return bzfp;
+}
+
+
+/*---------------------------------------------------*/
+/*--
+ open file for read or write.
+ ex) bzopen("file","w9")
+ case path="" or NULL => use stdin or stdout.
+--*/
+BZFILE * BZ_API(BZ2_bzopen)
+ ( const char *path,
+ const char *mode )
+{
+ return bzopen_or_bzdopen(path,-1,mode,/*bzopen*/0);
+}
+
+
+/*---------------------------------------------------*/
+BZFILE * BZ_API(BZ2_bzdopen)
+ ( int fd,
+ const char *mode )
+{
+ return bzopen_or_bzdopen(NULL,fd,mode,/*bzdopen*/1);
+}
+
+
+/*---------------------------------------------------*/
+int BZ_API(BZ2_bzread) (BZFILE* b, void* buf, int len )
+{
+ int bzerr, nread;
+ if (((bzFile*)b)->lastErr == BZ_STREAM_END) return 0;
+ nread = BZ2_bzRead(&bzerr,b,buf,len);
+ if (bzerr == BZ_OK || bzerr == BZ_STREAM_END) {
+ return nread;
+ } else {
+ return -1;
+ }
+}
+
+
+/*---------------------------------------------------*/
+int BZ_API(BZ2_bzwrite) (BZFILE* b, void* buf, int len )
+{
+ int bzerr;
+
+ BZ2_bzWrite(&bzerr,b,buf,len);
+ if(bzerr == BZ_OK){
+ return len;
+ }else{
+ return -1;
+ }
+}
+
+
+/*---------------------------------------------------*/
+int BZ_API(BZ2_bzflush) (BZFILE *b)
+{
+ /* do nothing now... */
+ return 0;
+}
+
+
+/*---------------------------------------------------*/
+void BZ_API(BZ2_bzclose) (BZFILE* b)
+{
+ int bzerr;
+ FILE *fp;
+
+ if (b==NULL) {return;}
+ fp = ((bzFile *)b)->handle;
+ if(((bzFile*)b)->writing){
+ BZ2_bzWriteClose(&bzerr,b,0,NULL,NULL);
+ if(bzerr != BZ_OK){
+ BZ2_bzWriteClose(NULL,b,1,NULL,NULL);
+ }
+ }else{
+ BZ2_bzReadClose(&bzerr,b);
+ }
+ if(fp!=stdin && fp!=stdout){
+ fclose(fp);
+ }
+}
+
+
+/*---------------------------------------------------*/
+/*--
+ return last error code
+--*/
+static const char *bzerrorstrings[] = {
+ "OK"
+ ,"SEQUENCE_ERROR"
+ ,"PARAM_ERROR"
+ ,"MEM_ERROR"
+ ,"DATA_ERROR"
+ ,"DATA_ERROR_MAGIC"
+ ,"IO_ERROR"
+ ,"UNEXPECTED_EOF"
+ ,"OUTBUFF_FULL"
+ ,"CONFIG_ERROR"
+ ,"???" /* for future */
+ ,"???" /* for future */
+ ,"???" /* for future */
+ ,"???" /* for future */
+ ,"???" /* for future */
+ ,"???" /* for future */
+};
+
+
+const char * BZ_API(BZ2_bzerror) (BZFILE *b, int *errnum)
+{
+ int err = ((bzFile *)b)->lastErr;
+
+ if(err>0) err = 0;
+ *errnum = err;
+ return bzerrorstrings[err*-1];
+}
+#endif
+
+
+/*-------------------------------------------------------------*/
+/*--- end bzlib.c ---*/
+/*-------------------------------------------------------------*/
--- /dev/null
+
+/*-------------------------------------------------------------*/
+/*--- Public header file for the library. ---*/
+/*--- bzlib.h ---*/
+/*-------------------------------------------------------------*/
+
+/* ------------------------------------------------------------------
+ This file is part of bzip2/libbzip2, a program and library for
+ lossless, block-sorting data compression.
+
+ bzip2/libbzip2 version 1.0.6 of 6 September 2010
+ Copyright (C) 1996-2010 Julian Seward <jseward@bzip.org>
+
+ Please read the WARNING, DISCLAIMER and PATENTS sections in the
+ README file.
+
+ This program is released under the terms of the license contained
+ in the file LICENSE.
+ ------------------------------------------------------------------ */
+
+
+#ifndef _BZLIB_H
+#define _BZLIB_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define BZ_RUN 0
+#define BZ_FLUSH 1
+#define BZ_FINISH 2
+
+#define BZ_OK 0
+#define BZ_RUN_OK 1
+#define BZ_FLUSH_OK 2
+#define BZ_FINISH_OK 3
+#define BZ_STREAM_END 4
+#define BZ_SEQUENCE_ERROR (-1)
+#define BZ_PARAM_ERROR (-2)
+#define BZ_MEM_ERROR (-3)
+#define BZ_DATA_ERROR (-4)
+#define BZ_DATA_ERROR_MAGIC (-5)
+#define BZ_IO_ERROR (-6)
+#define BZ_UNEXPECTED_EOF (-7)
+#define BZ_OUTBUFF_FULL (-8)
+#define BZ_CONFIG_ERROR (-9)
+
+typedef
+ struct {
+ char *next_in;
+ unsigned int avail_in;
+ unsigned int total_in_lo32;
+ unsigned int total_in_hi32;
+
+ char *next_out;
+ unsigned int avail_out;
+ unsigned int total_out_lo32;
+ unsigned int total_out_hi32;
+
+ void *state;
+
+ void *(*bzalloc)(void *,int,int);
+ void (*bzfree)(void *,void *);
+ void *opaque;
+ }
+ bz_stream;
+
+
+#ifndef BZ_IMPORT
+#define BZ_EXPORT
+#endif
+
+#ifndef BZ_NO_STDIO
+/* Need a definitition for FILE */
+#include <stdio.h>
+#endif
+
+#ifdef _WIN32
+# include <windows.h>
+# ifdef small
+ /* windows.h define small to char */
+# undef small
+# endif
+# ifdef BZ_EXPORT
+# define BZ_API(func) WINAPI func
+# define BZ_EXTERN extern
+# else
+ /* import windows dll dynamically */
+# define BZ_API(func) (WINAPI * func)
+# define BZ_EXTERN
+# endif
+#else
+# define BZ_API(func) func
+# define BZ_EXTERN extern
+#endif
+
+
+/*-- Core (low-level) library functions --*/
+
+BZ_EXTERN int BZ_API(BZ2_bzCompressInit) (
+ bz_stream* strm,
+ int blockSize100k,
+ int verbosity,
+ int workFactor
+ );
+
+BZ_EXTERN int BZ_API(BZ2_bzCompress) (
+ bz_stream* strm,
+ int action
+ );
+
+BZ_EXTERN int BZ_API(BZ2_bzCompressEnd) (
+ bz_stream* strm
+ );
+
+BZ_EXTERN int BZ_API(BZ2_bzDecompressInit) (
+ bz_stream *strm,
+ int verbosity,
+ int small
+ );
+
+BZ_EXTERN int BZ_API(BZ2_bzDecompress) (
+ bz_stream* strm
+ );
+
+BZ_EXTERN int BZ_API(BZ2_bzDecompressEnd) (
+ bz_stream *strm
+ );
+
+
+
+/*-- High(er) level library functions --*/
+
+#ifndef BZ_NO_STDIO
+#define BZ_MAX_UNUSED 5000
+
+typedef void BZFILE;
+
+BZ_EXTERN BZFILE* BZ_API(BZ2_bzReadOpen) (
+ int* bzerror,
+ FILE* f,
+ int verbosity,
+ int small,
+ void* unused,
+ int nUnused
+ );
+
+BZ_EXTERN void BZ_API(BZ2_bzReadClose) (
+ int* bzerror,
+ BZFILE* b
+ );
+
+BZ_EXTERN void BZ_API(BZ2_bzReadGetUnused) (
+ int* bzerror,
+ BZFILE* b,
+ void** unused,
+ int* nUnused
+ );
+
+BZ_EXTERN int BZ_API(BZ2_bzRead) (
+ int* bzerror,
+ BZFILE* b,
+ void* buf,
+ int len
+ );
+
+BZ_EXTERN BZFILE* BZ_API(BZ2_bzWriteOpen) (
+ int* bzerror,
+ FILE* f,
+ int blockSize100k,
+ int verbosity,
+ int workFactor
+ );
+
+BZ_EXTERN void BZ_API(BZ2_bzWrite) (
+ int* bzerror,
+ BZFILE* b,
+ void* buf,
+ int len
+ );
+
+BZ_EXTERN void BZ_API(BZ2_bzWriteClose) (
+ int* bzerror,
+ BZFILE* b,
+ int abandon,
+ unsigned int* nbytes_in,
+ unsigned int* nbytes_out
+ );
+
+BZ_EXTERN void BZ_API(BZ2_bzWriteClose64) (
+ int* bzerror,
+ BZFILE* b,
+ int abandon,
+ unsigned int* nbytes_in_lo32,
+ unsigned int* nbytes_in_hi32,
+ unsigned int* nbytes_out_lo32,
+ unsigned int* nbytes_out_hi32
+ );
+#endif
+
+
+/*-- Utility functions --*/
+
+BZ_EXTERN int BZ_API(BZ2_bzBuffToBuffCompress) (
+ char* dest,
+ unsigned int* destLen,
+ char* source,
+ unsigned int sourceLen,
+ int blockSize100k,
+ int verbosity,
+ int workFactor
+ );
+
+BZ_EXTERN int BZ_API(BZ2_bzBuffToBuffDecompress) (
+ char* dest,
+ unsigned int* destLen,
+ char* source,
+ unsigned int sourceLen,
+ int small,
+ int verbosity
+ );
+
+
+/*--
+ Code contributed by Yoshioka Tsuneo (tsuneo@rr.iij4u.or.jp)
+ to support better zlib compatibility.
+ This code is not _officially_ part of libbzip2 (yet);
+ I haven't tested it, documented it, or considered the
+ threading-safeness of it.
+ If this code breaks, please contact both Yoshioka and me.
+--*/
+
+BZ_EXTERN const char * BZ_API(BZ2_bzlibVersion) (
+ void
+ );
+
+#ifndef BZ_NO_STDIO
+BZ_EXTERN BZFILE * BZ_API(BZ2_bzopen) (
+ const char *path,
+ const char *mode
+ );
+
+BZ_EXTERN BZFILE * BZ_API(BZ2_bzdopen) (
+ int fd,
+ const char *mode
+ );
+
+BZ_EXTERN int BZ_API(BZ2_bzread) (
+ BZFILE* b,
+ void* buf,
+ int len
+ );
+
+BZ_EXTERN int BZ_API(BZ2_bzwrite) (
+ BZFILE* b,
+ void* buf,
+ int len
+ );
+
+BZ_EXTERN int BZ_API(BZ2_bzflush) (
+ BZFILE* b
+ );
+
+BZ_EXTERN void BZ_API(BZ2_bzclose) (
+ BZFILE* b
+ );
+
+BZ_EXTERN const char * BZ_API(BZ2_bzerror) (
+ BZFILE *b,
+ int *errnum
+ );
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+
+/*-------------------------------------------------------------*/
+/*--- end bzlib.h ---*/
+/*-------------------------------------------------------------*/
--- /dev/null
+
+/*-------------------------------------------------------------*/
+/*--- Private header file for the library. ---*/
+/*--- bzlib_private.h ---*/
+/*-------------------------------------------------------------*/
+
+/* ------------------------------------------------------------------
+ This file is part of bzip2/libbzip2, a program and library for
+ lossless, block-sorting data compression.
+
+ bzip2/libbzip2 version 1.0.6 of 6 September 2010
+ Copyright (C) 1996-2010 Julian Seward <jseward@bzip.org>
+
+ Please read the WARNING, DISCLAIMER and PATENTS sections in the
+ README file.
+
+ This program is released under the terms of the license contained
+ in the file LICENSE.
+ ------------------------------------------------------------------ */
+
+
+#ifndef _BZLIB_PRIVATE_H
+#define _BZLIB_PRIVATE_H
+
+#include <stdlib.h>
+
+#ifndef BZ_NO_STDIO
+#include <stdio.h>
+#include <ctype.h>
+#include <string.h>
+#endif
+
+#include "bzlib.h"
+
+
+
+/*-- General stuff. --*/
+
+#define BZ_VERSION "1.0.6, 6-Sept-2010"
+
+typedef char Char;
+typedef unsigned char Bool;
+typedef unsigned char UChar;
+typedef int Int32;
+typedef unsigned int UInt32;
+typedef short Int16;
+typedef unsigned short UInt16;
+
+#define True ((Bool)1)
+#define False ((Bool)0)
+
+#ifndef __GNUC__
+#define __inline__ /* */
+#endif
+
+#ifndef BZ_NO_STDIO
+
+extern void BZ2_bz__AssertH__fail ( int errcode );
+#define AssertH(cond,errcode) \
+ { if (!(cond)) BZ2_bz__AssertH__fail ( errcode ); }
+
+#if BZ_DEBUG
+#define AssertD(cond,msg) \
+ { if (!(cond)) { \
+ fprintf ( stderr, \
+ "\n\nlibbzip2(debug build): internal error\n\t%s\n", msg );\
+ exit(1); \
+ }}
+#else
+#define AssertD(cond,msg) /* */
+#endif
+
+#define VPrintf0(zf) \
+ fprintf(stderr,zf)
+#define VPrintf1(zf,za1) \
+ fprintf(stderr,zf,za1)
+#define VPrintf2(zf,za1,za2) \
+ fprintf(stderr,zf,za1,za2)
+#define VPrintf3(zf,za1,za2,za3) \
+ fprintf(stderr,zf,za1,za2,za3)
+#define VPrintf4(zf,za1,za2,za3,za4) \
+ fprintf(stderr,zf,za1,za2,za3,za4)
+#define VPrintf5(zf,za1,za2,za3,za4,za5) \
+ fprintf(stderr,zf,za1,za2,za3,za4,za5)
+
+#else
+
+extern void bz_internal_error ( int errcode );
+#define AssertH(cond,errcode) \
+ { if (!(cond)) bz_internal_error ( errcode ); }
+#define AssertD(cond,msg) do { } while (0)
+#define VPrintf0(zf) do { } while (0)
+#define VPrintf1(zf,za1) do { } while (0)
+#define VPrintf2(zf,za1,za2) do { } while (0)
+#define VPrintf3(zf,za1,za2,za3) do { } while (0)
+#define VPrintf4(zf,za1,za2,za3,za4) do { } while (0)
+#define VPrintf5(zf,za1,za2,za3,za4,za5) do { } while (0)
+
+#endif
+
+
+#define BZALLOC(nnn) (strm->bzalloc)(strm->opaque,(nnn),1)
+#define BZFREE(ppp) (strm->bzfree)(strm->opaque,(ppp))
+
+
+/*-- Header bytes. --*/
+
+#define BZ_HDR_B 0x42 /* 'B' */
+#define BZ_HDR_Z 0x5a /* 'Z' */
+#define BZ_HDR_h 0x68 /* 'h' */
+#define BZ_HDR_0 0x30 /* '0' */
+
+/*-- Constants for the back end. --*/
+
+#define BZ_MAX_ALPHA_SIZE 258
+#define BZ_MAX_CODE_LEN 23
+
+#define BZ_RUNA 0
+#define BZ_RUNB 1
+
+#define BZ_N_GROUPS 6
+#define BZ_G_SIZE 50
+#define BZ_N_ITERS 4
+
+#define BZ_MAX_SELECTORS (2 + (900000 / BZ_G_SIZE))
+
+
+
+/*-- Stuff for randomising repetitive blocks. --*/
+
+extern Int32 BZ2_rNums[512];
+
+#define BZ_RAND_DECLS \
+ Int32 rNToGo; \
+ Int32 rTPos \
+
+#define BZ_RAND_INIT_MASK \
+ s->rNToGo = 0; \
+ s->rTPos = 0 \
+
+#define BZ_RAND_MASK ((s->rNToGo == 1) ? 1 : 0)
+
+#define BZ_RAND_UPD_MASK \
+ if (s->rNToGo == 0) { \
+ s->rNToGo = BZ2_rNums[s->rTPos]; \
+ s->rTPos++; \
+ if (s->rTPos == 512) s->rTPos = 0; \
+ } \
+ s->rNToGo--;
+
+
+
+/*-- Stuff for doing CRCs. --*/
+
+extern UInt32 BZ2_crc32Table[256];
+
+#define BZ_INITIALISE_CRC(crcVar) \
+{ \
+ crcVar = 0xffffffffL; \
+}
+
+#define BZ_FINALISE_CRC(crcVar) \
+{ \
+ crcVar = ~(crcVar); \
+}
+
+#define BZ_UPDATE_CRC(crcVar,cha) \
+{ \
+ crcVar = (crcVar << 8) ^ \
+ BZ2_crc32Table[(crcVar >> 24) ^ \
+ ((UChar)cha)]; \
+}
+
+
+
+/*-- States and modes for compression. --*/
+
+#define BZ_M_IDLE 1
+#define BZ_M_RUNNING 2
+#define BZ_M_FLUSHING 3
+#define BZ_M_FINISHING 4
+
+#define BZ_S_OUTPUT 1
+#define BZ_S_INPUT 2
+
+#define BZ_N_RADIX 2
+#define BZ_N_QSORT 12
+#define BZ_N_SHELL 18
+#define BZ_N_OVERSHOOT (BZ_N_RADIX + BZ_N_QSORT + BZ_N_SHELL + 2)
+
+
+
+
+/*-- Structure holding all the compression-side stuff. --*/
+
+typedef
+ struct {
+ /* pointer back to the struct bz_stream */
+ bz_stream* strm;
+
+ /* mode this stream is in, and whether inputting */
+ /* or outputting data */
+ Int32 mode;
+ Int32 state;
+
+ /* remembers avail_in when flush/finish requested */
+ UInt32 avail_in_expect;
+
+ /* for doing the block sorting */
+ UInt32* arr1;
+ UInt32* arr2;
+ UInt32* ftab;
+ Int32 origPtr;
+
+ /* aliases for arr1 and arr2 */
+ UInt32* ptr;
+ UChar* block;
+ UInt16* mtfv;
+ UChar* zbits;
+
+ /* for deciding when to use the fallback sorting algorithm */
+ Int32 workFactor;
+
+ /* run-length-encoding of the input */
+ UInt32 state_in_ch;
+ Int32 state_in_len;
+ BZ_RAND_DECLS;
+
+ /* input and output limits and current posns */
+ Int32 nblock;
+ Int32 nblockMAX;
+ Int32 numZ;
+ Int32 state_out_pos;
+
+ /* map of bytes used in block */
+ Int32 nInUse;
+ Bool inUse[256];
+ UChar unseqToSeq[256];
+
+ /* the buffer for bit stream creation */
+ UInt32 bsBuff;
+ Int32 bsLive;
+
+ /* block and combined CRCs */
+ UInt32 blockCRC;
+ UInt32 combinedCRC;
+
+ /* misc administratium */
+ Int32 verbosity;
+ Int32 blockNo;
+ Int32 blockSize100k;
+
+ /* stuff for coding the MTF values */
+ Int32 nMTF;
+ Int32 mtfFreq [BZ_MAX_ALPHA_SIZE];
+ UChar selector [BZ_MAX_SELECTORS];
+ UChar selectorMtf[BZ_MAX_SELECTORS];
+
+ UChar len [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
+ Int32 code [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
+ Int32 rfreq [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
+ /* second dimension: only 3 needed; 4 makes index calculations faster */
+ UInt32 len_pack[BZ_MAX_ALPHA_SIZE][4];
+
+ }
+ EState;
+
+
+
+/*-- externs for compression. --*/
+
+extern void
+BZ2_blockSort ( EState* );
+
+extern void
+BZ2_compressBlock ( EState*, Bool );
+
+extern void
+BZ2_bsInitWrite ( EState* );
+
+extern void
+BZ2_hbAssignCodes ( Int32*, UChar*, Int32, Int32, Int32 );
+
+extern void
+BZ2_hbMakeCodeLengths ( UChar*, Int32*, Int32, Int32 );
+
+
+
+/*-- states for decompression. --*/
+
+#define BZ_X_IDLE 1
+#define BZ_X_OUTPUT 2
+
+#define BZ_X_MAGIC_1 10
+#define BZ_X_MAGIC_2 11
+#define BZ_X_MAGIC_3 12
+#define BZ_X_MAGIC_4 13
+#define BZ_X_BLKHDR_1 14
+#define BZ_X_BLKHDR_2 15
+#define BZ_X_BLKHDR_3 16
+#define BZ_X_BLKHDR_4 17
+#define BZ_X_BLKHDR_5 18
+#define BZ_X_BLKHDR_6 19
+#define BZ_X_BCRC_1 20
+#define BZ_X_BCRC_2 21
+#define BZ_X_BCRC_3 22
+#define BZ_X_BCRC_4 23
+#define BZ_X_RANDBIT 24
+#define BZ_X_ORIGPTR_1 25
+#define BZ_X_ORIGPTR_2 26
+#define BZ_X_ORIGPTR_3 27
+#define BZ_X_MAPPING_1 28
+#define BZ_X_MAPPING_2 29
+#define BZ_X_SELECTOR_1 30
+#define BZ_X_SELECTOR_2 31
+#define BZ_X_SELECTOR_3 32
+#define BZ_X_CODING_1 33
+#define BZ_X_CODING_2 34
+#define BZ_X_CODING_3 35
+#define BZ_X_MTF_1 36
+#define BZ_X_MTF_2 37
+#define BZ_X_MTF_3 38
+#define BZ_X_MTF_4 39
+#define BZ_X_MTF_5 40
+#define BZ_X_MTF_6 41
+#define BZ_X_ENDHDR_2 42
+#define BZ_X_ENDHDR_3 43
+#define BZ_X_ENDHDR_4 44
+#define BZ_X_ENDHDR_5 45
+#define BZ_X_ENDHDR_6 46
+#define BZ_X_CCRC_1 47
+#define BZ_X_CCRC_2 48
+#define BZ_X_CCRC_3 49
+#define BZ_X_CCRC_4 50
+
+
+
+/*-- Constants for the fast MTF decoder. --*/
+
+#define MTFA_SIZE 4096
+#define MTFL_SIZE 16
+
+
+
+/*-- Structure holding all the decompression-side stuff. --*/
+
+typedef
+ struct {
+ /* pointer back to the struct bz_stream */
+ bz_stream* strm;
+
+ /* state indicator for this stream */
+ Int32 state;
+
+ /* for doing the final run-length decoding */
+ UChar state_out_ch;
+ Int32 state_out_len;
+ Bool blockRandomised;
+ BZ_RAND_DECLS;
+
+ /* the buffer for bit stream reading */
+ UInt32 bsBuff;
+ Int32 bsLive;
+
+ /* misc administratium */
+ Int32 blockSize100k;
+ Bool smallDecompress;
+ Int32 currBlockNo;
+ Int32 verbosity;
+
+ /* for undoing the Burrows-Wheeler transform */
+ Int32 origPtr;
+ UInt32 tPos;
+ Int32 k0;
+ Int32 unzftab[256];
+ Int32 nblock_used;
+ Int32 cftab[257];
+ Int32 cftabCopy[257];
+
+ /* for undoing the Burrows-Wheeler transform (FAST) */
+ UInt32 *tt;
+
+ /* for undoing the Burrows-Wheeler transform (SMALL) */
+ UInt16 *ll16;
+ UChar *ll4;
+
+ /* stored and calculated CRCs */
+ UInt32 storedBlockCRC;
+ UInt32 storedCombinedCRC;
+ UInt32 calculatedBlockCRC;
+ UInt32 calculatedCombinedCRC;
+
+ /* map of bytes used in block */
+ Int32 nInUse;
+ Bool inUse[256];
+ Bool inUse16[16];
+ UChar seqToUnseq[256];
+
+ /* for decoding the MTF values */
+ UChar mtfa [MTFA_SIZE];
+ Int32 mtfbase[256 / MTFL_SIZE];
+ UChar selector [BZ_MAX_SELECTORS];
+ UChar selectorMtf[BZ_MAX_SELECTORS];
+ UChar len [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
+
+ Int32 limit [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
+ Int32 base [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
+ Int32 perm [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
+ Int32 minLens[BZ_N_GROUPS];
+
+ /* save area for scalars in the main decompress code */
+ Int32 save_i;
+ Int32 save_j;
+ Int32 save_t;
+ Int32 save_alphaSize;
+ Int32 save_nGroups;
+ Int32 save_nSelectors;
+ Int32 save_EOB;
+ Int32 save_groupNo;
+ Int32 save_groupPos;
+ Int32 save_nextSym;
+ Int32 save_nblockMAX;
+ Int32 save_nblock;
+ Int32 save_es;
+ Int32 save_N;
+ Int32 save_curr;
+ Int32 save_zt;
+ Int32 save_zn;
+ Int32 save_zvec;
+ Int32 save_zj;
+ Int32 save_gSel;
+ Int32 save_gMinlen;
+ Int32* save_gLimit;
+ Int32* save_gBase;
+ Int32* save_gPerm;
+
+ }
+ DState;
+
+
+
+/*-- Macros for decompression. --*/
+
+#define BZ_GET_FAST(cccc) \
+ /* c_tPos is unsigned, hence test < 0 is pointless. */ \
+ if (s->tPos >= (UInt32)100000 * (UInt32)s->blockSize100k) return True; \
+ s->tPos = s->tt[s->tPos]; \
+ cccc = (UChar)(s->tPos & 0xff); \
+ s->tPos >>= 8;
+
+#define BZ_GET_FAST_C(cccc) \
+ /* c_tPos is unsigned, hence test < 0 is pointless. */ \
+ if (c_tPos >= (UInt32)100000 * (UInt32)ro_blockSize100k) return True; \
+ c_tPos = c_tt[c_tPos]; \
+ cccc = (UChar)(c_tPos & 0xff); \
+ c_tPos >>= 8;
+
+#define SET_LL4(i,n) \
+ { if (((i) & 0x1) == 0) \
+ s->ll4[(i) >> 1] = (s->ll4[(i) >> 1] & 0xf0) | (n); else \
+ s->ll4[(i) >> 1] = (s->ll4[(i) >> 1] & 0x0f) | ((n) << 4); \
+ }
+
+#define GET_LL4(i) \
+ ((((UInt32)(s->ll4[(i) >> 1])) >> (((i) << 2) & 0x4)) & 0xF)
+
+#define SET_LL(i,n) \
+ { s->ll16[i] = (UInt16)(n & 0x0000ffff); \
+ SET_LL4(i, n >> 16); \
+ }
+
+#define GET_LL(i) \
+ (((UInt32)s->ll16[i]) | (GET_LL4(i) << 16))
+
+#define BZ_GET_SMALL(cccc) \
+ /* c_tPos is unsigned, hence test < 0 is pointless. */ \
+ if (s->tPos >= (UInt32)100000 * (UInt32)s->blockSize100k) return True; \
+ cccc = BZ2_indexIntoF ( s->tPos, s->cftab ); \
+ s->tPos = GET_LL(s->tPos);
+
+
+/*-- externs for decompression. --*/
+
+extern Int32
+BZ2_indexIntoF ( Int32, Int32* );
+
+extern Int32
+BZ2_decompress ( DState* );
+
+extern void
+BZ2_hbCreateDecodeTables ( Int32*, Int32*, Int32*, UChar*,
+ Int32, Int32, Int32 );
+
+
+#endif
+
+
+/*-- BZ_NO_STDIO seems to make NULL disappear on some platforms. --*/
+
+#ifdef BZ_NO_STDIO
+#ifndef NULL
+#define NULL 0
+#endif
+#endif
+
+
+/*-------------------------------------------------------------*/
+/*--- end bzlib_private.h ---*/
+/*-------------------------------------------------------------*/
--- /dev/null
+
+/*-------------------------------------------------------------*/
+/*--- Compression machinery (not incl block sorting) ---*/
+/*--- compress.c ---*/
+/*-------------------------------------------------------------*/
+
+/* ------------------------------------------------------------------
+ This file is part of bzip2/libbzip2, a program and library for
+ lossless, block-sorting data compression.
+
+ bzip2/libbzip2 version 1.0.6 of 6 September 2010
+ Copyright (C) 1996-2010 Julian Seward <jseward@bzip.org>
+
+ Please read the WARNING, DISCLAIMER and PATENTS sections in the
+ README file.
+
+ This program is released under the terms of the license contained
+ in the file LICENSE.
+ ------------------------------------------------------------------ */
+
+
+/* CHANGES
+ 0.9.0 -- original version.
+ 0.9.0a/b -- no changes in this file.
+ 0.9.0c -- changed setting of nGroups in sendMTFValues()
+ so as to do a bit better on small files
+*/
+
+#include "bzlib_private.h"
+
+
+/*---------------------------------------------------*/
+/*--- Bit stream I/O ---*/
+/*---------------------------------------------------*/
+
+/*---------------------------------------------------*/
+void BZ2_bsInitWrite ( EState* s )
+{
+ s->bsLive = 0;
+ s->bsBuff = 0;
+}
+
+
+/*---------------------------------------------------*/
+static
+void bsFinishWrite ( EState* s )
+{
+ while (s->bsLive > 0) {
+ s->zbits[s->numZ] = (UChar)(s->bsBuff >> 24);
+ s->numZ++;
+ s->bsBuff <<= 8;
+ s->bsLive -= 8;
+ }
+}
+
+
+/*---------------------------------------------------*/
+#define bsNEEDW(nz) \
+{ \
+ while (s->bsLive >= 8) { \
+ s->zbits[s->numZ] \
+ = (UChar)(s->bsBuff >> 24); \
+ s->numZ++; \
+ s->bsBuff <<= 8; \
+ s->bsLive -= 8; \
+ } \
+}
+
+
+/*---------------------------------------------------*/
+static
+__inline__
+void bsW ( EState* s, Int32 n, UInt32 v )
+{
+ bsNEEDW ( n );
+ s->bsBuff |= (v << (32 - s->bsLive - n));
+ s->bsLive += n;
+}
+
+
+/*---------------------------------------------------*/
+static
+void bsPutUInt32 ( EState* s, UInt32 u )
+{
+ bsW ( s, 8, (u >> 24) & 0xffL );
+ bsW ( s, 8, (u >> 16) & 0xffL );
+ bsW ( s, 8, (u >> 8) & 0xffL );
+ bsW ( s, 8, u & 0xffL );
+}
+
+
+/*---------------------------------------------------*/
+static
+void bsPutUChar ( EState* s, UChar c )
+{
+ bsW( s, 8, (UInt32)c );
+}
+
+
+/*---------------------------------------------------*/
+/*--- The back end proper ---*/
+/*---------------------------------------------------*/
+
+/*---------------------------------------------------*/
+static
+void makeMaps_e ( EState* s )
+{
+ Int32 i;
+ s->nInUse = 0;
+ for (i = 0; i < 256; i++)
+ if (s->inUse[i]) {
+ s->unseqToSeq[i] = s->nInUse;
+ s->nInUse++;
+ }
+}
+
+
+/*---------------------------------------------------*/
+static
+void generateMTFValues ( EState* s )
+{
+ UChar yy[256];
+ Int32 i, j;
+ Int32 zPend;
+ Int32 wr;
+ Int32 EOB;
+
+ /*
+ After sorting (eg, here),
+ s->arr1 [ 0 .. s->nblock-1 ] holds sorted order,
+ and
+ ((UChar*)s->arr2) [ 0 .. s->nblock-1 ]
+ holds the original block data.
+
+ The first thing to do is generate the MTF values,
+ and put them in
+ ((UInt16*)s->arr1) [ 0 .. s->nblock-1 ].
+ Because there are strictly fewer or equal MTF values
+ than block values, ptr values in this area are overwritten
+ with MTF values only when they are no longer needed.
+
+ The final compressed bitstream is generated into the
+ area starting at
+ (UChar*) (&((UChar*)s->arr2)[s->nblock])
+
+ These storage aliases are set up in bzCompressInit(),
+ except for the last one, which is arranged in
+ compressBlock().
+ */
+ UInt32* ptr = s->ptr;
+ UChar* block = s->block;
+ UInt16* mtfv = s->mtfv;
+
+ makeMaps_e ( s );
+ EOB = s->nInUse+1;
+
+ for (i = 0; i <= EOB; i++) s->mtfFreq[i] = 0;
+
+ wr = 0;
+ zPend = 0;
+ for (i = 0; i < s->nInUse; i++) yy[i] = (UChar) i;
+
+ for (i = 0; i < s->nblock; i++) {
+ UChar ll_i;
+ AssertD ( wr <= i, "generateMTFValues(1)" );
+ j = ptr[i]-1; if (j < 0) j += s->nblock;
+ ll_i = s->unseqToSeq[block[j]];
+ AssertD ( ll_i < s->nInUse, "generateMTFValues(2a)" );
+
+ if (yy[0] == ll_i) {
+ zPend++;
+ } else {
+
+ if (zPend > 0) {
+ zPend--;
+ while (True) {
+ if (zPend & 1) {
+ mtfv[wr] = BZ_RUNB; wr++;
+ s->mtfFreq[BZ_RUNB]++;
+ } else {
+ mtfv[wr] = BZ_RUNA; wr++;
+ s->mtfFreq[BZ_RUNA]++;
+ }
+ if (zPend < 2) break;
+ zPend = (zPend - 2) / 2;
+ };
+ zPend = 0;
+ }
+ {
+ register UChar rtmp;
+ register UChar* ryy_j;
+ register UChar rll_i;
+ rtmp = yy[1];
+ yy[1] = yy[0];
+ ryy_j = &(yy[1]);
+ rll_i = ll_i;
+ while ( rll_i != rtmp ) {
+ register UChar rtmp2;
+ ryy_j++;
+ rtmp2 = rtmp;
+ rtmp = *ryy_j;
+ *ryy_j = rtmp2;
+ };
+ yy[0] = rtmp;
+ j = ryy_j - &(yy[0]);
+ mtfv[wr] = j+1; wr++; s->mtfFreq[j+1]++;
+ }
+
+ }
+ }
+
+ if (zPend > 0) {
+ zPend--;
+ while (True) {
+ if (zPend & 1) {
+ mtfv[wr] = BZ_RUNB; wr++;
+ s->mtfFreq[BZ_RUNB]++;
+ } else {
+ mtfv[wr] = BZ_RUNA; wr++;
+ s->mtfFreq[BZ_RUNA]++;
+ }
+ if (zPend < 2) break;
+ zPend = (zPend - 2) / 2;
+ };
+ zPend = 0;
+ }
+
+ mtfv[wr] = EOB; wr++; s->mtfFreq[EOB]++;
+
+ s->nMTF = wr;
+}
+
+
+/*---------------------------------------------------*/
+#define BZ_LESSER_ICOST 0
+#define BZ_GREATER_ICOST 15
+
+static
+void sendMTFValues ( EState* s )
+{
+ Int32 v, t, i, j, gs, ge, totc, bt, bc, iter;
+ Int32 nSelectors, alphaSize, minLen, maxLen, selCtr;
+ Int32 nGroups, nBytes;
+
+ /*--
+ UChar len [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
+ is a global since the decoder also needs it.
+
+ Int32 code[BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
+ Int32 rfreq[BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
+ are also globals only used in this proc.
+ Made global to keep stack frame size small.
+ --*/
+
+
+ UInt16 cost[BZ_N_GROUPS];
+ Int32 fave[BZ_N_GROUPS];
+
+ UInt16* mtfv = s->mtfv;
+
+ if (s->verbosity >= 3)
+ VPrintf3( " %d in block, %d after MTF & 1-2 coding, "
+ "%d+2 syms in use\n",
+ s->nblock, s->nMTF, s->nInUse );
+
+ alphaSize = s->nInUse+2;
+ for (t = 0; t < BZ_N_GROUPS; t++)
+ for (v = 0; v < alphaSize; v++)
+ s->len[t][v] = BZ_GREATER_ICOST;
+
+ /*--- Decide how many coding tables to use ---*/
+ AssertH ( s->nMTF > 0, 3001 );
+ if (s->nMTF < 200) nGroups = 2; else
+ if (s->nMTF < 600) nGroups = 3; else
+ if (s->nMTF < 1200) nGroups = 4; else
+ if (s->nMTF < 2400) nGroups = 5; else
+ nGroups = 6;
+
+ /*--- Generate an initial set of coding tables ---*/
+ {
+ Int32 nPart, remF, tFreq, aFreq;
+
+ nPart = nGroups;
+ remF = s->nMTF;
+ gs = 0;
+ while (nPart > 0) {
+ tFreq = remF / nPart;
+ ge = gs-1;
+ aFreq = 0;
+ while (aFreq < tFreq && ge < alphaSize-1) {
+ ge++;
+ aFreq += s->mtfFreq[ge];
+ }
+
+ if (ge > gs
+ && nPart != nGroups && nPart != 1
+ && ((nGroups-nPart) % 2 == 1)) {
+ aFreq -= s->mtfFreq[ge];
+ ge--;
+ }
+
+ if (s->verbosity >= 3)
+ VPrintf5( " initial group %d, [%d .. %d], "
+ "has %d syms (%4.1f%%)\n",
+ nPart, gs, ge, aFreq,
+ (100.0 * (float)aFreq) / (float)(s->nMTF) );
+
+ for (v = 0; v < alphaSize; v++)
+ if (v >= gs && v <= ge)
+ s->len[nPart-1][v] = BZ_LESSER_ICOST; else
+ s->len[nPart-1][v] = BZ_GREATER_ICOST;
+
+ nPart--;
+ gs = ge+1;
+ remF -= aFreq;
+ }
+ }
+
+ /*---
+ Iterate up to BZ_N_ITERS times to improve the tables.
+ ---*/
+ for (iter = 0; iter < BZ_N_ITERS; iter++) {
+
+ for (t = 0; t < nGroups; t++) fave[t] = 0;
+
+ for (t = 0; t < nGroups; t++)
+ for (v = 0; v < alphaSize; v++)
+ s->rfreq[t][v] = 0;
+
+ /*---
+ Set up an auxiliary length table which is used to fast-track
+ the common case (nGroups == 6).
+ ---*/
+ if (nGroups == 6) {
+ for (v = 0; v < alphaSize; v++) {
+ s->len_pack[v][0] = (s->len[1][v] << 16) | s->len[0][v];
+ s->len_pack[v][1] = (s->len[3][v] << 16) | s->len[2][v];
+ s->len_pack[v][2] = (s->len[5][v] << 16) | s->len[4][v];
+ }
+ }
+
+ nSelectors = 0;
+ totc = 0;
+ gs = 0;
+ while (True) {
+
+ /*--- Set group start & end marks. --*/
+ if (gs >= s->nMTF) break;
+ ge = gs + BZ_G_SIZE - 1;
+ if (ge >= s->nMTF) ge = s->nMTF-1;
+
+ /*--
+ Calculate the cost of this group as coded
+ by each of the coding tables.
+ --*/
+ for (t = 0; t < nGroups; t++) cost[t] = 0;
+
+ if (nGroups == 6 && 50 == ge-gs+1) {
+ /*--- fast track the common case ---*/
+ register UInt32 cost01, cost23, cost45;
+ register UInt16 icv;
+ cost01 = cost23 = cost45 = 0;
+
+# define BZ_ITER(nn) \
+ icv = mtfv[gs+(nn)]; \
+ cost01 += s->len_pack[icv][0]; \
+ cost23 += s->len_pack[icv][1]; \
+ cost45 += s->len_pack[icv][2]; \
+
+ BZ_ITER(0); BZ_ITER(1); BZ_ITER(2); BZ_ITER(3); BZ_ITER(4);
+ BZ_ITER(5); BZ_ITER(6); BZ_ITER(7); BZ_ITER(8); BZ_ITER(9);
+ BZ_ITER(10); BZ_ITER(11); BZ_ITER(12); BZ_ITER(13); BZ_ITER(14);
+ BZ_ITER(15); BZ_ITER(16); BZ_ITER(17); BZ_ITER(18); BZ_ITER(19);
+ BZ_ITER(20); BZ_ITER(21); BZ_ITER(22); BZ_ITER(23); BZ_ITER(24);
+ BZ_ITER(25); BZ_ITER(26); BZ_ITER(27); BZ_ITER(28); BZ_ITER(29);
+ BZ_ITER(30); BZ_ITER(31); BZ_ITER(32); BZ_ITER(33); BZ_ITER(34);
+ BZ_ITER(35); BZ_ITER(36); BZ_ITER(37); BZ_ITER(38); BZ_ITER(39);
+ BZ_ITER(40); BZ_ITER(41); BZ_ITER(42); BZ_ITER(43); BZ_ITER(44);
+ BZ_ITER(45); BZ_ITER(46); BZ_ITER(47); BZ_ITER(48); BZ_ITER(49);
+
+# undef BZ_ITER
+
+ cost[0] = cost01 & 0xffff; cost[1] = cost01 >> 16;
+ cost[2] = cost23 & 0xffff; cost[3] = cost23 >> 16;
+ cost[4] = cost45 & 0xffff; cost[5] = cost45 >> 16;
+
+ } else {
+ /*--- slow version which correctly handles all situations ---*/
+ for (i = gs; i <= ge; i++) {
+ UInt16 icv = mtfv[i];
+ for (t = 0; t < nGroups; t++) cost[t] += s->len[t][icv];
+ }
+ }
+
+ /*--
+ Find the coding table which is best for this group,
+ and record its identity in the selector table.
+ --*/
+ bc = 999999999; bt = -1;
+ for (t = 0; t < nGroups; t++)
+ if (cost[t] < bc) { bc = cost[t]; bt = t; };
+ totc += bc;
+ fave[bt]++;
+ s->selector[nSelectors] = bt;
+ nSelectors++;
+
+ /*--
+ Increment the symbol frequencies for the selected table.
+ --*/
+ if (nGroups == 6 && 50 == ge-gs+1) {
+ /*--- fast track the common case ---*/
+
+# define BZ_ITUR(nn) s->rfreq[bt][ mtfv[gs+(nn)] ]++
+
+ BZ_ITUR(0); BZ_ITUR(1); BZ_ITUR(2); BZ_ITUR(3); BZ_ITUR(4);
+ BZ_ITUR(5); BZ_ITUR(6); BZ_ITUR(7); BZ_ITUR(8); BZ_ITUR(9);
+ BZ_ITUR(10); BZ_ITUR(11); BZ_ITUR(12); BZ_ITUR(13); BZ_ITUR(14);
+ BZ_ITUR(15); BZ_ITUR(16); BZ_ITUR(17); BZ_ITUR(18); BZ_ITUR(19);
+ BZ_ITUR(20); BZ_ITUR(21); BZ_ITUR(22); BZ_ITUR(23); BZ_ITUR(24);
+ BZ_ITUR(25); BZ_ITUR(26); BZ_ITUR(27); BZ_ITUR(28); BZ_ITUR(29);
+ BZ_ITUR(30); BZ_ITUR(31); BZ_ITUR(32); BZ_ITUR(33); BZ_ITUR(34);
+ BZ_ITUR(35); BZ_ITUR(36); BZ_ITUR(37); BZ_ITUR(38); BZ_ITUR(39);
+ BZ_ITUR(40); BZ_ITUR(41); BZ_ITUR(42); BZ_ITUR(43); BZ_ITUR(44);
+ BZ_ITUR(45); BZ_ITUR(46); BZ_ITUR(47); BZ_ITUR(48); BZ_ITUR(49);
+
+# undef BZ_ITUR
+
+ } else {
+ /*--- slow version which correctly handles all situations ---*/
+ for (i = gs; i <= ge; i++)
+ s->rfreq[bt][ mtfv[i] ]++;
+ }
+
+ gs = ge+1;
+ }
+ if (s->verbosity >= 3) {
+ VPrintf2 ( " pass %d: size is %d, grp uses are ",
+ iter+1, totc/8 );
+ for (t = 0; t < nGroups; t++)
+ VPrintf1 ( "%d ", fave[t] );
+ VPrintf0 ( "\n" );
+ }
+
+ /*--
+ Recompute the tables based on the accumulated frequencies.
+ --*/
+ /* maxLen was changed from 20 to 17 in bzip2-1.0.3. See
+ comment in huffman.c for details. */
+ for (t = 0; t < nGroups; t++)
+ BZ2_hbMakeCodeLengths ( &(s->len[t][0]), &(s->rfreq[t][0]),
+ alphaSize, 20 );
+ }
+
+
+ AssertH( nGroups < 8, 3002 );
+ AssertH( nSelectors < 32768 &&
+ nSelectors <= (2 + (900000 / BZ_G_SIZE)),
+ 3003 );
+
+
+ /*--- Compute MTF values for the selectors. ---*/
+ {
+ UChar pos[BZ_N_GROUPS], ll_i, tmp2, tmp;
+ for (i = 0; i < nGroups; i++) pos[i] = i;
+ for (i = 0; i < nSelectors; i++) {
+ ll_i = s->selector[i];
+ j = 0;
+ tmp = pos[j];
+ while ( ll_i != tmp ) {
+ j++;
+ tmp2 = tmp;
+ tmp = pos[j];
+ pos[j] = tmp2;
+ };
+ pos[0] = tmp;
+ s->selectorMtf[i] = j;
+ }
+ };
+
+ /*--- Assign actual codes for the tables. --*/
+ for (t = 0; t < nGroups; t++) {
+ minLen = 32;
+ maxLen = 0;
+ for (i = 0; i < alphaSize; i++) {
+ if (s->len[t][i] > maxLen) maxLen = s->len[t][i];
+ if (s->len[t][i] < minLen) minLen = s->len[t][i];
+ }
+ AssertH ( !(maxLen > 20 ), 3004 );
+ AssertH ( !(minLen < 1), 3005 );
+ BZ2_hbAssignCodes ( &(s->code[t][0]), &(s->len[t][0]),
+ minLen, maxLen, alphaSize );
+ }
+
+ /*--- Transmit the mapping table. ---*/
+ {
+ Bool inUse16[16];
+ for (i = 0; i < 16; i++) {
+ inUse16[i] = False;
+ for (j = 0; j < 16; j++)
+ if (s->inUse[i * 16 + j]) inUse16[i] = True;
+ }
+
+ nBytes = s->numZ;
+ for (i = 0; i < 16; i++)
+ if (inUse16[i]) bsW(s,1,1); else bsW(s,1,0);
+
+ for (i = 0; i < 16; i++)
+ if (inUse16[i])
+ for (j = 0; j < 16; j++) {
+ if (s->inUse[i * 16 + j]) bsW(s,1,1); else bsW(s,1,0);
+ }
+
+ if (s->verbosity >= 3)
+ VPrintf1( " bytes: mapping %d, ", s->numZ-nBytes );
+ }
+
+ /*--- Now the selectors. ---*/
+ nBytes = s->numZ;
+ bsW ( s, 3, nGroups );
+ bsW ( s, 15, nSelectors );
+ for (i = 0; i < nSelectors; i++) {
+ for (j = 0; j < s->selectorMtf[i]; j++) bsW(s,1,1);
+ bsW(s,1,0);
+ }
+ if (s->verbosity >= 3)
+ VPrintf1( "selectors %d, ", s->numZ-nBytes );
+
+ /*--- Now the coding tables. ---*/
+ nBytes = s->numZ;
+
+ for (t = 0; t < nGroups; t++) {
+ Int32 curr = s->len[t][0];
+ bsW ( s, 5, curr );
+ for (i = 0; i < alphaSize; i++) {
+ while (curr < s->len[t][i]) { bsW(s,2,2); curr++; /* 10 */ };
+ while (curr > s->len[t][i]) { bsW(s,2,3); curr--; /* 11 */ };
+ bsW ( s, 1, 0 );
+ }
+ }
+
+ if (s->verbosity >= 3)
+ VPrintf1 ( "code lengths %d, ", s->numZ-nBytes );
+
+ /*--- And finally, the block data proper ---*/
+ nBytes = s->numZ;
+ selCtr = 0;
+ gs = 0;
+ while (True) {
+ if (gs >= s->nMTF) break;
+ ge = gs + BZ_G_SIZE - 1;
+ if (ge >= s->nMTF) ge = s->nMTF-1;
+ AssertH ( s->selector[selCtr] < nGroups, 3006 );
+
+ if (nGroups == 6 && 50 == ge-gs+1) {
+ /*--- fast track the common case ---*/
+ UInt16 mtfv_i;
+ UChar* s_len_sel_selCtr
+ = &(s->len[s->selector[selCtr]][0]);
+ Int32* s_code_sel_selCtr
+ = &(s->code[s->selector[selCtr]][0]);
+
+# define BZ_ITAH(nn) \
+ mtfv_i = mtfv[gs+(nn)]; \
+ bsW ( s, \
+ s_len_sel_selCtr[mtfv_i], \
+ s_code_sel_selCtr[mtfv_i] )
+
+ BZ_ITAH(0); BZ_ITAH(1); BZ_ITAH(2); BZ_ITAH(3); BZ_ITAH(4);
+ BZ_ITAH(5); BZ_ITAH(6); BZ_ITAH(7); BZ_ITAH(8); BZ_ITAH(9);
+ BZ_ITAH(10); BZ_ITAH(11); BZ_ITAH(12); BZ_ITAH(13); BZ_ITAH(14);
+ BZ_ITAH(15); BZ_ITAH(16); BZ_ITAH(17); BZ_ITAH(18); BZ_ITAH(19);
+ BZ_ITAH(20); BZ_ITAH(21); BZ_ITAH(22); BZ_ITAH(23); BZ_ITAH(24);
+ BZ_ITAH(25); BZ_ITAH(26); BZ_ITAH(27); BZ_ITAH(28); BZ_ITAH(29);
+ BZ_ITAH(30); BZ_ITAH(31); BZ_ITAH(32); BZ_ITAH(33); BZ_ITAH(34);
+ BZ_ITAH(35); BZ_ITAH(36); BZ_ITAH(37); BZ_ITAH(38); BZ_ITAH(39);
+ BZ_ITAH(40); BZ_ITAH(41); BZ_ITAH(42); BZ_ITAH(43); BZ_ITAH(44);
+ BZ_ITAH(45); BZ_ITAH(46); BZ_ITAH(47); BZ_ITAH(48); BZ_ITAH(49);
+
+# undef BZ_ITAH
+
+ } else {
+ /*--- slow version which correctly handles all situations ---*/
+ for (i = gs; i <= ge; i++) {
+ bsW ( s,
+ s->len [s->selector[selCtr]] [mtfv[i]],
+ s->code [s->selector[selCtr]] [mtfv[i]] );
+ }
+ }
+
+
+ gs = ge+1;
+ selCtr++;
+ }
+ AssertH( selCtr == nSelectors, 3007 );
+
+ if (s->verbosity >= 3)
+ VPrintf1( "codes %d\n", s->numZ-nBytes );
+}
+
+
+/*---------------------------------------------------*/
+void BZ2_compressBlock ( EState* s, Bool is_last_block )
+{
+ if (s->nblock > 0) {
+
+ BZ_FINALISE_CRC ( s->blockCRC );
+ s->combinedCRC = (s->combinedCRC << 1) | (s->combinedCRC >> 31);
+ s->combinedCRC ^= s->blockCRC;
+ if (s->blockNo > 1) s->numZ = 0;
+
+ if (s->verbosity >= 2)
+ VPrintf4( " block %d: crc = 0x%08x, "
+ "combined CRC = 0x%08x, size = %d\n",
+ s->blockNo, s->blockCRC, s->combinedCRC, s->nblock );
+
+ BZ2_blockSort ( s );
+ }
+
+ s->zbits = (UChar*) (&((UChar*)s->arr2)[s->nblock]);
+
+ /*-- If this is the first block, create the stream header. --*/
+ if (s->blockNo == 1) {
+ BZ2_bsInitWrite ( s );
+ bsPutUChar ( s, BZ_HDR_B );
+ bsPutUChar ( s, BZ_HDR_Z );
+ bsPutUChar ( s, BZ_HDR_h );
+ bsPutUChar ( s, (UChar)(BZ_HDR_0 + s->blockSize100k) );
+ }
+
+ if (s->nblock > 0) {
+
+ bsPutUChar ( s, 0x31 ); bsPutUChar ( s, 0x41 );
+ bsPutUChar ( s, 0x59 ); bsPutUChar ( s, 0x26 );
+ bsPutUChar ( s, 0x53 ); bsPutUChar ( s, 0x59 );
+
+ /*-- Now the block's CRC, so it is in a known place. --*/
+ bsPutUInt32 ( s, s->blockCRC );
+
+ /*--
+ Now a single bit indicating (non-)randomisation.
+ As of version 0.9.5, we use a better sorting algorithm
+ which makes randomisation unnecessary. So always set
+ the randomised bit to 'no'. Of course, the decoder
+ still needs to be able to handle randomised blocks
+ so as to maintain backwards compatibility with
+ older versions of bzip2.
+ --*/
+ bsW(s,1,0);
+
+ bsW ( s, 24, s->origPtr );
+ generateMTFValues ( s );
+ sendMTFValues ( s );
+ }
+
+
+ /*-- If this is the last block, add the stream trailer. --*/
+ if (is_last_block) {
+
+ bsPutUChar ( s, 0x17 ); bsPutUChar ( s, 0x72 );
+ bsPutUChar ( s, 0x45 ); bsPutUChar ( s, 0x38 );
+ bsPutUChar ( s, 0x50 ); bsPutUChar ( s, 0x90 );
+ bsPutUInt32 ( s, s->combinedCRC );
+ if (s->verbosity >= 2)
+ VPrintf1( " final combined CRC = 0x%08x\n ", s->combinedCRC );
+ bsFinishWrite ( s );
+ }
+}
+
+
+/*-------------------------------------------------------------*/
+/*--- end compress.c ---*/
+/*-------------------------------------------------------------*/
--- /dev/null
+
+/*-------------------------------------------------------------*/
+/*--- Table for doing CRCs ---*/
+/*--- crctable.c ---*/
+/*-------------------------------------------------------------*/
+
+/* ------------------------------------------------------------------
+ This file is part of bzip2/libbzip2, a program and library for
+ lossless, block-sorting data compression.
+
+ bzip2/libbzip2 version 1.0.6 of 6 September 2010
+ Copyright (C) 1996-2010 Julian Seward <jseward@bzip.org>
+
+ Please read the WARNING, DISCLAIMER and PATENTS sections in the
+ README file.
+
+ This program is released under the terms of the license contained
+ in the file LICENSE.
+ ------------------------------------------------------------------ */
+
+
+#include "bzlib_private.h"
+
+/*--
+ I think this is an implementation of the AUTODIN-II,
+ Ethernet & FDDI 32-bit CRC standard. Vaguely derived
+ from code by Rob Warnock, in Section 51 of the
+ comp.compression FAQ.
+--*/
+
+UInt32 BZ2_crc32Table[256] = {
+
+ /*-- Ugly, innit? --*/
+
+ 0x00000000L, 0x04c11db7L, 0x09823b6eL, 0x0d4326d9L,
+ 0x130476dcL, 0x17c56b6bL, 0x1a864db2L, 0x1e475005L,
+ 0x2608edb8L, 0x22c9f00fL, 0x2f8ad6d6L, 0x2b4bcb61L,
+ 0x350c9b64L, 0x31cd86d3L, 0x3c8ea00aL, 0x384fbdbdL,
+ 0x4c11db70L, 0x48d0c6c7L, 0x4593e01eL, 0x4152fda9L,
+ 0x5f15adacL, 0x5bd4b01bL, 0x569796c2L, 0x52568b75L,
+ 0x6a1936c8L, 0x6ed82b7fL, 0x639b0da6L, 0x675a1011L,
+ 0x791d4014L, 0x7ddc5da3L, 0x709f7b7aL, 0x745e66cdL,
+ 0x9823b6e0L, 0x9ce2ab57L, 0x91a18d8eL, 0x95609039L,
+ 0x8b27c03cL, 0x8fe6dd8bL, 0x82a5fb52L, 0x8664e6e5L,
+ 0xbe2b5b58L, 0xbaea46efL, 0xb7a96036L, 0xb3687d81L,
+ 0xad2f2d84L, 0xa9ee3033L, 0xa4ad16eaL, 0xa06c0b5dL,
+ 0xd4326d90L, 0xd0f37027L, 0xddb056feL, 0xd9714b49L,
+ 0xc7361b4cL, 0xc3f706fbL, 0xceb42022L, 0xca753d95L,
+ 0xf23a8028L, 0xf6fb9d9fL, 0xfbb8bb46L, 0xff79a6f1L,
+ 0xe13ef6f4L, 0xe5ffeb43L, 0xe8bccd9aL, 0xec7dd02dL,
+ 0x34867077L, 0x30476dc0L, 0x3d044b19L, 0x39c556aeL,
+ 0x278206abL, 0x23431b1cL, 0x2e003dc5L, 0x2ac12072L,
+ 0x128e9dcfL, 0x164f8078L, 0x1b0ca6a1L, 0x1fcdbb16L,
+ 0x018aeb13L, 0x054bf6a4L, 0x0808d07dL, 0x0cc9cdcaL,
+ 0x7897ab07L, 0x7c56b6b0L, 0x71159069L, 0x75d48ddeL,
+ 0x6b93dddbL, 0x6f52c06cL, 0x6211e6b5L, 0x66d0fb02L,
+ 0x5e9f46bfL, 0x5a5e5b08L, 0x571d7dd1L, 0x53dc6066L,
+ 0x4d9b3063L, 0x495a2dd4L, 0x44190b0dL, 0x40d816baL,
+ 0xaca5c697L, 0xa864db20L, 0xa527fdf9L, 0xa1e6e04eL,
+ 0xbfa1b04bL, 0xbb60adfcL, 0xb6238b25L, 0xb2e29692L,
+ 0x8aad2b2fL, 0x8e6c3698L, 0x832f1041L, 0x87ee0df6L,
+ 0x99a95df3L, 0x9d684044L, 0x902b669dL, 0x94ea7b2aL,
+ 0xe0b41de7L, 0xe4750050L, 0xe9362689L, 0xedf73b3eL,
+ 0xf3b06b3bL, 0xf771768cL, 0xfa325055L, 0xfef34de2L,
+ 0xc6bcf05fL, 0xc27dede8L, 0xcf3ecb31L, 0xcbffd686L,
+ 0xd5b88683L, 0xd1799b34L, 0xdc3abdedL, 0xd8fba05aL,
+ 0x690ce0eeL, 0x6dcdfd59L, 0x608edb80L, 0x644fc637L,
+ 0x7a089632L, 0x7ec98b85L, 0x738aad5cL, 0x774bb0ebL,
+ 0x4f040d56L, 0x4bc510e1L, 0x46863638L, 0x42472b8fL,
+ 0x5c007b8aL, 0x58c1663dL, 0x558240e4L, 0x51435d53L,
+ 0x251d3b9eL, 0x21dc2629L, 0x2c9f00f0L, 0x285e1d47L,
+ 0x36194d42L, 0x32d850f5L, 0x3f9b762cL, 0x3b5a6b9bL,
+ 0x0315d626L, 0x07d4cb91L, 0x0a97ed48L, 0x0e56f0ffL,
+ 0x1011a0faL, 0x14d0bd4dL, 0x19939b94L, 0x1d528623L,
+ 0xf12f560eL, 0xf5ee4bb9L, 0xf8ad6d60L, 0xfc6c70d7L,
+ 0xe22b20d2L, 0xe6ea3d65L, 0xeba91bbcL, 0xef68060bL,
+ 0xd727bbb6L, 0xd3e6a601L, 0xdea580d8L, 0xda649d6fL,
+ 0xc423cd6aL, 0xc0e2d0ddL, 0xcda1f604L, 0xc960ebb3L,
+ 0xbd3e8d7eL, 0xb9ff90c9L, 0xb4bcb610L, 0xb07daba7L,
+ 0xae3afba2L, 0xaafbe615L, 0xa7b8c0ccL, 0xa379dd7bL,
+ 0x9b3660c6L, 0x9ff77d71L, 0x92b45ba8L, 0x9675461fL,
+ 0x8832161aL, 0x8cf30badL, 0x81b02d74L, 0x857130c3L,
+ 0x5d8a9099L, 0x594b8d2eL, 0x5408abf7L, 0x50c9b640L,
+ 0x4e8ee645L, 0x4a4ffbf2L, 0x470cdd2bL, 0x43cdc09cL,
+ 0x7b827d21L, 0x7f436096L, 0x7200464fL, 0x76c15bf8L,
+ 0x68860bfdL, 0x6c47164aL, 0x61043093L, 0x65c52d24L,
+ 0x119b4be9L, 0x155a565eL, 0x18197087L, 0x1cd86d30L,
+ 0x029f3d35L, 0x065e2082L, 0x0b1d065bL, 0x0fdc1becL,
+ 0x3793a651L, 0x3352bbe6L, 0x3e119d3fL, 0x3ad08088L,
+ 0x2497d08dL, 0x2056cd3aL, 0x2d15ebe3L, 0x29d4f654L,
+ 0xc5a92679L, 0xc1683bceL, 0xcc2b1d17L, 0xc8ea00a0L,
+ 0xd6ad50a5L, 0xd26c4d12L, 0xdf2f6bcbL, 0xdbee767cL,
+ 0xe3a1cbc1L, 0xe760d676L, 0xea23f0afL, 0xeee2ed18L,
+ 0xf0a5bd1dL, 0xf464a0aaL, 0xf9278673L, 0xfde69bc4L,
+ 0x89b8fd09L, 0x8d79e0beL, 0x803ac667L, 0x84fbdbd0L,
+ 0x9abc8bd5L, 0x9e7d9662L, 0x933eb0bbL, 0x97ffad0cL,
+ 0xafb010b1L, 0xab710d06L, 0xa6322bdfL, 0xa2f33668L,
+ 0xbcb4666dL, 0xb8757bdaL, 0xb5365d03L, 0xb1f740b4L
+};
+
+
+/*-------------------------------------------------------------*/
+/*--- end crctable.c ---*/
+/*-------------------------------------------------------------*/
--- /dev/null
+
+/*-------------------------------------------------------------*/
+/*--- Decompression machinery ---*/
+/*--- decompress.c ---*/
+/*-------------------------------------------------------------*/
+
+/* ------------------------------------------------------------------
+ This file is part of bzip2/libbzip2, a program and library for
+ lossless, block-sorting data compression.
+
+ bzip2/libbzip2 version 1.0.6 of 6 September 2010
+ Copyright (C) 1996-2010 Julian Seward <jseward@bzip.org>
+
+ Please read the WARNING, DISCLAIMER and PATENTS sections in the
+ README file.
+
+ This program is released under the terms of the license contained
+ in the file LICENSE.
+ ------------------------------------------------------------------ */
+
+
+#include "bzlib_private.h"
+
+
+/*---------------------------------------------------*/
+static
+void makeMaps_d ( DState* s )
+{
+ Int32 i;
+ s->nInUse = 0;
+ for (i = 0; i < 256; i++)
+ if (s->inUse[i]) {
+ s->seqToUnseq[s->nInUse] = i;
+ s->nInUse++;
+ }
+}
+
+
+/*---------------------------------------------------*/
+#define RETURN(rrr) \
+ { retVal = rrr; goto save_state_and_return; };
+
+#define GET_BITS(lll,vvv,nnn) \
+ case lll: s->state = lll; \
+ while (True) { \
+ if (s->bsLive >= nnn) { \
+ UInt32 v; \
+ v = (s->bsBuff >> \
+ (s->bsLive-nnn)) & ((1 << nnn)-1); \
+ s->bsLive -= nnn; \
+ vvv = v; \
+ break; \
+ } \
+ if (s->strm->avail_in == 0) RETURN(BZ_OK); \
+ s->bsBuff \
+ = (s->bsBuff << 8) | \
+ ((UInt32) \
+ (*((UChar*)(s->strm->next_in)))); \
+ s->bsLive += 8; \
+ s->strm->next_in++; \
+ s->strm->avail_in--; \
+ s->strm->total_in_lo32++; \
+ if (s->strm->total_in_lo32 == 0) \
+ s->strm->total_in_hi32++; \
+ }
+
+#define GET_UCHAR(lll,uuu) \
+ GET_BITS(lll,uuu,8)
+
+#define GET_BIT(lll,uuu) \
+ GET_BITS(lll,uuu,1)
+
+/*---------------------------------------------------*/
+#define GET_MTF_VAL(label1,label2,lval) \
+{ \
+ if (groupPos == 0) { \
+ groupNo++; \
+ if (groupNo >= nSelectors) \
+ RETURN(BZ_DATA_ERROR); \
+ groupPos = BZ_G_SIZE; \
+ gSel = s->selector[groupNo]; \
+ gMinlen = s->minLens[gSel]; \
+ gLimit = &(s->limit[gSel][0]); \
+ gPerm = &(s->perm[gSel][0]); \
+ gBase = &(s->base[gSel][0]); \
+ } \
+ groupPos--; \
+ zn = gMinlen; \
+ GET_BITS(label1, zvec, zn); \
+ while (1) { \
+ if (zn > 20 /* the longest code */) \
+ RETURN(BZ_DATA_ERROR); \
+ if (zvec <= gLimit[zn]) break; \
+ zn++; \
+ GET_BIT(label2, zj); \
+ zvec = (zvec << 1) | zj; \
+ }; \
+ if (zvec - gBase[zn] < 0 \
+ || zvec - gBase[zn] >= BZ_MAX_ALPHA_SIZE) \
+ RETURN(BZ_DATA_ERROR); \
+ lval = gPerm[zvec - gBase[zn]]; \
+}
+
+
+/*---------------------------------------------------*/
+Int32 BZ2_decompress ( DState* s )
+{
+ UChar uc;
+ Int32 retVal;
+ Int32 minLen, maxLen;
+ bz_stream* strm = s->strm;
+
+ /* stuff that needs to be saved/restored */
+ Int32 i;
+ Int32 j;
+ Int32 t;
+ Int32 alphaSize;
+ Int32 nGroups;
+ Int32 nSelectors;
+ Int32 EOB;
+ Int32 groupNo;
+ Int32 groupPos;
+ Int32 nextSym;
+ Int32 nblockMAX;
+ Int32 nblock;
+ Int32 es;
+ Int32 N;
+ Int32 curr;
+ Int32 zt;
+ Int32 zn;
+ Int32 zvec;
+ Int32 zj;
+ Int32 gSel;
+ Int32 gMinlen;
+ Int32* gLimit;
+ Int32* gBase;
+ Int32* gPerm;
+
+ if (s->state == BZ_X_MAGIC_1) {
+ /*initialise the save area*/
+ s->save_i = 0;
+ s->save_j = 0;
+ s->save_t = 0;
+ s->save_alphaSize = 0;
+ s->save_nGroups = 0;
+ s->save_nSelectors = 0;
+ s->save_EOB = 0;
+ s->save_groupNo = 0;
+ s->save_groupPos = 0;
+ s->save_nextSym = 0;
+ s->save_nblockMAX = 0;
+ s->save_nblock = 0;
+ s->save_es = 0;
+ s->save_N = 0;
+ s->save_curr = 0;
+ s->save_zt = 0;
+ s->save_zn = 0;
+ s->save_zvec = 0;
+ s->save_zj = 0;
+ s->save_gSel = 0;
+ s->save_gMinlen = 0;
+ s->save_gLimit = NULL;
+ s->save_gBase = NULL;
+ s->save_gPerm = NULL;
+ }
+
+ /*restore from the save area*/
+ i = s->save_i;
+ j = s->save_j;
+ t = s->save_t;
+ alphaSize = s->save_alphaSize;
+ nGroups = s->save_nGroups;
+ nSelectors = s->save_nSelectors;
+ EOB = s->save_EOB;
+ groupNo = s->save_groupNo;
+ groupPos = s->save_groupPos;
+ nextSym = s->save_nextSym;
+ nblockMAX = s->save_nblockMAX;
+ nblock = s->save_nblock;
+ es = s->save_es;
+ N = s->save_N;
+ curr = s->save_curr;
+ zt = s->save_zt;
+ zn = s->save_zn;
+ zvec = s->save_zvec;
+ zj = s->save_zj;
+ gSel = s->save_gSel;
+ gMinlen = s->save_gMinlen;
+ gLimit = s->save_gLimit;
+ gBase = s->save_gBase;
+ gPerm = s->save_gPerm;
+
+ retVal = BZ_OK;
+
+ switch (s->state) {
+
+ GET_UCHAR(BZ_X_MAGIC_1, uc);
+ if (uc != BZ_HDR_B) RETURN(BZ_DATA_ERROR_MAGIC);
+
+ GET_UCHAR(BZ_X_MAGIC_2, uc);
+ if (uc != BZ_HDR_Z) RETURN(BZ_DATA_ERROR_MAGIC);
+
+ GET_UCHAR(BZ_X_MAGIC_3, uc)
+ if (uc != BZ_HDR_h) RETURN(BZ_DATA_ERROR_MAGIC);
+
+ GET_BITS(BZ_X_MAGIC_4, s->blockSize100k, 8)
+ if (s->blockSize100k < (BZ_HDR_0 + 1) ||
+ s->blockSize100k > (BZ_HDR_0 + 9)) RETURN(BZ_DATA_ERROR_MAGIC);
+ s->blockSize100k -= BZ_HDR_0;
+
+ if (s->smallDecompress) {
+ s->ll16 = BZALLOC( s->blockSize100k * 100000 * sizeof(UInt16) );
+ s->ll4 = BZALLOC(
+ ((1 + s->blockSize100k * 100000) >> 1) * sizeof(UChar)
+ );
+ if (s->ll16 == NULL || s->ll4 == NULL) RETURN(BZ_MEM_ERROR);
+ } else {
+ s->tt = BZALLOC( s->blockSize100k * 100000 * sizeof(Int32) );
+ if (s->tt == NULL) RETURN(BZ_MEM_ERROR);
+ }
+
+ GET_UCHAR(BZ_X_BLKHDR_1, uc);
+
+ if (uc == 0x17) goto endhdr_2;
+ if (uc != 0x31) RETURN(BZ_DATA_ERROR);
+ GET_UCHAR(BZ_X_BLKHDR_2, uc);
+ if (uc != 0x41) RETURN(BZ_DATA_ERROR);
+ GET_UCHAR(BZ_X_BLKHDR_3, uc);
+ if (uc != 0x59) RETURN(BZ_DATA_ERROR);
+ GET_UCHAR(BZ_X_BLKHDR_4, uc);
+ if (uc != 0x26) RETURN(BZ_DATA_ERROR);
+ GET_UCHAR(BZ_X_BLKHDR_5, uc);
+ if (uc != 0x53) RETURN(BZ_DATA_ERROR);
+ GET_UCHAR(BZ_X_BLKHDR_6, uc);
+ if (uc != 0x59) RETURN(BZ_DATA_ERROR);
+
+ s->currBlockNo++;
+ if (s->verbosity >= 2)
+ VPrintf1 ( "\n [%d: huff+mtf ", s->currBlockNo );
+
+ s->storedBlockCRC = 0;
+ GET_UCHAR(BZ_X_BCRC_1, uc);
+ s->storedBlockCRC = (s->storedBlockCRC << 8) | ((UInt32)uc);
+ GET_UCHAR(BZ_X_BCRC_2, uc);
+ s->storedBlockCRC = (s->storedBlockCRC << 8) | ((UInt32)uc);
+ GET_UCHAR(BZ_X_BCRC_3, uc);
+ s->storedBlockCRC = (s->storedBlockCRC << 8) | ((UInt32)uc);
+ GET_UCHAR(BZ_X_BCRC_4, uc);
+ s->storedBlockCRC = (s->storedBlockCRC << 8) | ((UInt32)uc);
+
+ GET_BITS(BZ_X_RANDBIT, s->blockRandomised, 1);
+
+ s->origPtr = 0;
+ GET_UCHAR(BZ_X_ORIGPTR_1, uc);
+ s->origPtr = (s->origPtr << 8) | ((Int32)uc);
+ GET_UCHAR(BZ_X_ORIGPTR_2, uc);
+ s->origPtr = (s->origPtr << 8) | ((Int32)uc);
+ GET_UCHAR(BZ_X_ORIGPTR_3, uc);
+ s->origPtr = (s->origPtr << 8) | ((Int32)uc);
+
+ if (s->origPtr < 0)
+ RETURN(BZ_DATA_ERROR);
+ if (s->origPtr > 10 + 100000*s->blockSize100k)
+ RETURN(BZ_DATA_ERROR);
+
+ /*--- Receive the mapping table ---*/
+ for (i = 0; i < 16; i++) {
+ GET_BIT(BZ_X_MAPPING_1, uc);
+ if (uc == 1)
+ s->inUse16[i] = True; else
+ s->inUse16[i] = False;
+ }
+
+ for (i = 0; i < 256; i++) s->inUse[i] = False;
+
+ for (i = 0; i < 16; i++)
+ if (s->inUse16[i])
+ for (j = 0; j < 16; j++) {
+ GET_BIT(BZ_X_MAPPING_2, uc);
+ if (uc == 1) s->inUse[i * 16 + j] = True;
+ }
+ makeMaps_d ( s );
+ if (s->nInUse == 0) RETURN(BZ_DATA_ERROR);
+ alphaSize = s->nInUse+2;
+
+ /*--- Now the selectors ---*/
+ GET_BITS(BZ_X_SELECTOR_1, nGroups, 3);
+ if (nGroups < 2 || nGroups > 6) RETURN(BZ_DATA_ERROR);
+ GET_BITS(BZ_X_SELECTOR_2, nSelectors, 15);
+ if (nSelectors < 1) RETURN(BZ_DATA_ERROR);
+ for (i = 0; i < nSelectors; i++) {
+ j = 0;
+ while (True) {
+ GET_BIT(BZ_X_SELECTOR_3, uc);
+ if (uc == 0) break;
+ j++;
+ if (j >= nGroups) RETURN(BZ_DATA_ERROR);
+ }
+ s->selectorMtf[i] = j;
+ }
+
+ /*--- Undo the MTF values for the selectors. ---*/
+ {
+ UChar pos[BZ_N_GROUPS], tmp, v;
+ for (v = 0; v < nGroups; v++) pos[v] = v;
+
+ for (i = 0; i < nSelectors; i++) {
+ v = s->selectorMtf[i];
+ tmp = pos[v];
+ while (v > 0) { pos[v] = pos[v-1]; v--; }
+ pos[0] = tmp;
+ s->selector[i] = tmp;
+ }
+ }
+
+ /*--- Now the coding tables ---*/
+ for (t = 0; t < nGroups; t++) {
+ GET_BITS(BZ_X_CODING_1, curr, 5);
+ for (i = 0; i < alphaSize; i++) {
+ while (True) {
+ if (curr < 1 || curr > 20) RETURN(BZ_DATA_ERROR);
+ GET_BIT(BZ_X_CODING_2, uc);
+ if (uc == 0) break;
+ GET_BIT(BZ_X_CODING_3, uc);
+ if (uc == 0) curr++; else curr--;
+ }
+ s->len[t][i] = curr;
+ }
+ }
+
+ /*--- Create the Huffman decoding tables ---*/
+ for (t = 0; t < nGroups; t++) {
+ minLen = 32;
+ maxLen = 0;
+ for (i = 0; i < alphaSize; i++) {
+ if (s->len[t][i] > maxLen) maxLen = s->len[t][i];
+ if (s->len[t][i] < minLen) minLen = s->len[t][i];
+ }
+ BZ2_hbCreateDecodeTables (
+ &(s->limit[t][0]),
+ &(s->base[t][0]),
+ &(s->perm[t][0]),
+ &(s->len[t][0]),
+ minLen, maxLen, alphaSize
+ );
+ s->minLens[t] = minLen;
+ }
+
+ /*--- Now the MTF values ---*/
+
+ EOB = s->nInUse+1;
+ nblockMAX = 100000 * s->blockSize100k;
+ groupNo = -1;
+ groupPos = 0;
+
+ for (i = 0; i <= 255; i++) s->unzftab[i] = 0;
+
+ /*-- MTF init --*/
+ {
+ Int32 ii, jj, kk;
+ kk = MTFA_SIZE-1;
+ for (ii = 256 / MTFL_SIZE - 1; ii >= 0; ii--) {
+ for (jj = MTFL_SIZE-1; jj >= 0; jj--) {
+ s->mtfa[kk] = (UChar)(ii * MTFL_SIZE + jj);
+ kk--;
+ }
+ s->mtfbase[ii] = kk + 1;
+ }
+ }
+ /*-- end MTF init --*/
+
+ nblock = 0;
+ GET_MTF_VAL(BZ_X_MTF_1, BZ_X_MTF_2, nextSym);
+
+ while (True) {
+
+ if (nextSym == EOB) break;
+
+ if (nextSym == BZ_RUNA || nextSym == BZ_RUNB) {
+
+ es = -1;
+ N = 1;
+ do {
+ /* Check that N doesn't get too big, so that es doesn't
+ go negative. The maximum value that can be
+ RUNA/RUNB encoded is equal to the block size (post
+ the initial RLE), viz, 900k, so bounding N at 2
+ million should guard against overflow without
+ rejecting any legitimate inputs. */
+ if (N >= 2*1024*1024) RETURN(BZ_DATA_ERROR);
+ if (nextSym == BZ_RUNA) es = es + (0+1) * N; else
+ if (nextSym == BZ_RUNB) es = es + (1+1) * N;
+ N = N * 2;
+ GET_MTF_VAL(BZ_X_MTF_3, BZ_X_MTF_4, nextSym);
+ }
+ while (nextSym == BZ_RUNA || nextSym == BZ_RUNB);
+
+ es++;
+ uc = s->seqToUnseq[ s->mtfa[s->mtfbase[0]] ];
+ s->unzftab[uc] += es;
+
+ if (s->smallDecompress)
+ while (es > 0) {
+ if (nblock >= nblockMAX) RETURN(BZ_DATA_ERROR);
+ s->ll16[nblock] = (UInt16)uc;
+ nblock++;
+ es--;
+ }
+ else
+ while (es > 0) {
+ if (nblock >= nblockMAX) RETURN(BZ_DATA_ERROR);
+ s->tt[nblock] = (UInt32)uc;
+ nblock++;
+ es--;
+ };
+
+ continue;
+
+ } else {
+
+ if (nblock >= nblockMAX) RETURN(BZ_DATA_ERROR);
+
+ /*-- uc = MTF ( nextSym-1 ) --*/
+ {
+ Int32 ii, jj, kk, pp, lno, off;
+ UInt32 nn;
+ nn = (UInt32)(nextSym - 1);
+
+ if (nn < MTFL_SIZE) {
+ /* avoid general-case expense */
+ pp = s->mtfbase[0];
+ uc = s->mtfa[pp+nn];
+ while (nn > 3) {
+ Int32 z = pp+nn;
+ s->mtfa[(z) ] = s->mtfa[(z)-1];
+ s->mtfa[(z)-1] = s->mtfa[(z)-2];
+ s->mtfa[(z)-2] = s->mtfa[(z)-3];
+ s->mtfa[(z)-3] = s->mtfa[(z)-4];
+ nn -= 4;
+ }
+ while (nn > 0) {
+ s->mtfa[(pp+nn)] = s->mtfa[(pp+nn)-1]; nn--;
+ };
+ s->mtfa[pp] = uc;
+ } else {
+ /* general case */
+ lno = nn / MTFL_SIZE;
+ off = nn % MTFL_SIZE;
+ pp = s->mtfbase[lno] + off;
+ uc = s->mtfa[pp];
+ while (pp > s->mtfbase[lno]) {
+ s->mtfa[pp] = s->mtfa[pp-1]; pp--;
+ };
+ s->mtfbase[lno]++;
+ while (lno > 0) {
+ s->mtfbase[lno]--;
+ s->mtfa[s->mtfbase[lno]]
+ = s->mtfa[s->mtfbase[lno-1] + MTFL_SIZE - 1];
+ lno--;
+ }
+ s->mtfbase[0]--;
+ s->mtfa[s->mtfbase[0]] = uc;
+ if (s->mtfbase[0] == 0) {
+ kk = MTFA_SIZE-1;
+ for (ii = 256 / MTFL_SIZE-1; ii >= 0; ii--) {
+ for (jj = MTFL_SIZE-1; jj >= 0; jj--) {
+ s->mtfa[kk] = s->mtfa[s->mtfbase[ii] + jj];
+ kk--;
+ }
+ s->mtfbase[ii] = kk + 1;
+ }
+ }
+ }
+ }
+ /*-- end uc = MTF ( nextSym-1 ) --*/
+
+ s->unzftab[s->seqToUnseq[uc]]++;
+ if (s->smallDecompress)
+ s->ll16[nblock] = (UInt16)(s->seqToUnseq[uc]); else
+ s->tt[nblock] = (UInt32)(s->seqToUnseq[uc]);
+ nblock++;
+
+ GET_MTF_VAL(BZ_X_MTF_5, BZ_X_MTF_6, nextSym);
+ continue;
+ }
+ }
+
+ /* Now we know what nblock is, we can do a better sanity
+ check on s->origPtr.
+ */
+ if (s->origPtr < 0 || s->origPtr >= nblock)
+ RETURN(BZ_DATA_ERROR);
+
+ /*-- Set up cftab to facilitate generation of T^(-1) --*/
+ /* Check: unzftab entries in range. */
+ for (i = 0; i <= 255; i++) {
+ if (s->unzftab[i] < 0 || s->unzftab[i] > nblock)
+ RETURN(BZ_DATA_ERROR);
+ }
+ /* Actually generate cftab. */
+ s->cftab[0] = 0;
+ for (i = 1; i <= 256; i++) s->cftab[i] = s->unzftab[i-1];
+ for (i = 1; i <= 256; i++) s->cftab[i] += s->cftab[i-1];
+ /* Check: cftab entries in range. */
+ for (i = 0; i <= 256; i++) {
+ if (s->cftab[i] < 0 || s->cftab[i] > nblock) {
+ /* s->cftab[i] can legitimately be == nblock */
+ RETURN(BZ_DATA_ERROR);
+ }
+ }
+ /* Check: cftab entries non-descending. */
+ for (i = 1; i <= 256; i++) {
+ if (s->cftab[i-1] > s->cftab[i]) {
+ RETURN(BZ_DATA_ERROR);
+ }
+ }
+
+ s->state_out_len = 0;
+ s->state_out_ch = 0;
+ BZ_INITIALISE_CRC ( s->calculatedBlockCRC );
+ s->state = BZ_X_OUTPUT;
+ if (s->verbosity >= 2) VPrintf0 ( "rt+rld" );
+
+ if (s->smallDecompress) {
+
+ /*-- Make a copy of cftab, used in generation of T --*/
+ for (i = 0; i <= 256; i++) s->cftabCopy[i] = s->cftab[i];
+
+ /*-- compute the T vector --*/
+ for (i = 0; i < nblock; i++) {
+ uc = (UChar)(s->ll16[i]);
+ SET_LL(i, s->cftabCopy[uc]);
+ s->cftabCopy[uc]++;
+ }
+
+ /*-- Compute T^(-1) by pointer reversal on T --*/
+ i = s->origPtr;
+ j = GET_LL(i);
+ do {
+ Int32 tmp = GET_LL(j);
+ SET_LL(j, i);
+ i = j;
+ j = tmp;
+ }
+ while (i != s->origPtr);
+
+ s->tPos = s->origPtr;
+ s->nblock_used = 0;
+ if (s->blockRandomised) {
+ BZ_RAND_INIT_MASK;
+ BZ_GET_SMALL(s->k0); s->nblock_used++;
+ BZ_RAND_UPD_MASK; s->k0 ^= BZ_RAND_MASK;
+ } else {
+ BZ_GET_SMALL(s->k0); s->nblock_used++;
+ }
+
+ } else {
+
+ /*-- compute the T^(-1) vector --*/
+ for (i = 0; i < nblock; i++) {
+ uc = (UChar)(s->tt[i] & 0xff);
+ s->tt[s->cftab[uc]] |= (i << 8);
+ s->cftab[uc]++;
+ }
+
+ s->tPos = s->tt[s->origPtr] >> 8;
+ s->nblock_used = 0;
+ if (s->blockRandomised) {
+ BZ_RAND_INIT_MASK;
+ BZ_GET_FAST(s->k0); s->nblock_used++;
+ BZ_RAND_UPD_MASK; s->k0 ^= BZ_RAND_MASK;
+ } else {
+ BZ_GET_FAST(s->k0); s->nblock_used++;
+ }
+
+ }
+
+ RETURN(BZ_OK);
+
+
+
+ endhdr_2:
+
+ GET_UCHAR(BZ_X_ENDHDR_2, uc);
+ if (uc != 0x72) RETURN(BZ_DATA_ERROR);
+ GET_UCHAR(BZ_X_ENDHDR_3, uc);
+ if (uc != 0x45) RETURN(BZ_DATA_ERROR);
+ GET_UCHAR(BZ_X_ENDHDR_4, uc);
+ if (uc != 0x38) RETURN(BZ_DATA_ERROR);
+ GET_UCHAR(BZ_X_ENDHDR_5, uc);
+ if (uc != 0x50) RETURN(BZ_DATA_ERROR);
+ GET_UCHAR(BZ_X_ENDHDR_6, uc);
+ if (uc != 0x90) RETURN(BZ_DATA_ERROR);
+
+ s->storedCombinedCRC = 0;
+ GET_UCHAR(BZ_X_CCRC_1, uc);
+ s->storedCombinedCRC = (s->storedCombinedCRC << 8) | ((UInt32)uc);
+ GET_UCHAR(BZ_X_CCRC_2, uc);
+ s->storedCombinedCRC = (s->storedCombinedCRC << 8) | ((UInt32)uc);
+ GET_UCHAR(BZ_X_CCRC_3, uc);
+ s->storedCombinedCRC = (s->storedCombinedCRC << 8) | ((UInt32)uc);
+ GET_UCHAR(BZ_X_CCRC_4, uc);
+ s->storedCombinedCRC = (s->storedCombinedCRC << 8) | ((UInt32)uc);
+
+ s->state = BZ_X_IDLE;
+ RETURN(BZ_STREAM_END);
+
+ default: AssertH ( False, 4001 );
+ }
+
+ AssertH ( False, 4002 );
+
+ save_state_and_return:
+
+ s->save_i = i;
+ s->save_j = j;
+ s->save_t = t;
+ s->save_alphaSize = alphaSize;
+ s->save_nGroups = nGroups;
+ s->save_nSelectors = nSelectors;
+ s->save_EOB = EOB;
+ s->save_groupNo = groupNo;
+ s->save_groupPos = groupPos;
+ s->save_nextSym = nextSym;
+ s->save_nblockMAX = nblockMAX;
+ s->save_nblock = nblock;
+ s->save_es = es;
+ s->save_N = N;
+ s->save_curr = curr;
+ s->save_zt = zt;
+ s->save_zn = zn;
+ s->save_zvec = zvec;
+ s->save_zj = zj;
+ s->save_gSel = gSel;
+ s->save_gMinlen = gMinlen;
+ s->save_gLimit = gLimit;
+ s->save_gBase = gBase;
+ s->save_gPerm = gPerm;
+
+ return retVal;
+}
+
+
+/*-------------------------------------------------------------*/
+/*--- end decompress.c ---*/
+/*-------------------------------------------------------------*/
--- /dev/null
+
+/*-------------------------------------------------------------*/
+/*--- Huffman coding low-level stuff ---*/
+/*--- huffman.c ---*/
+/*-------------------------------------------------------------*/
+
+/* ------------------------------------------------------------------
+ This file is part of bzip2/libbzip2, a program and library for
+ lossless, block-sorting data compression.
+
+ bzip2/libbzip2 version 1.0.6 of 6 September 2010
+ Copyright (C) 1996-2010 Julian Seward <jseward@bzip.org>
+
+ Please read the WARNING, DISCLAIMER and PATENTS sections in the
+ README file.
+
+ This program is released under the terms of the license contained
+ in the file LICENSE.
+ ------------------------------------------------------------------ */
+
+
+#include "bzlib_private.h"
+
+/*---------------------------------------------------*/
+#define WEIGHTOF(zz0) ((zz0) & 0xffffff00)
+#define DEPTHOF(zz1) ((zz1) & 0x000000ff)
+#define MYMAX(zz2,zz3) ((zz2) > (zz3) ? (zz2) : (zz3))
+
+#define ADDWEIGHTS(zw1,zw2) \
+ (WEIGHTOF(zw1)+WEIGHTOF(zw2)) | \
+ (1 + MYMAX(DEPTHOF(zw1),DEPTHOF(zw2)))
+
+#define UPHEAP(z) \
+{ \
+ Int32 zz, tmp; \
+ zz = z; tmp = heap[zz]; \
+ while (weight[tmp] < weight[heap[zz >> 1]]) { \
+ heap[zz] = heap[zz >> 1]; \
+ zz >>= 1; \
+ } \
+ heap[zz] = tmp; \
+}
+
+#define DOWNHEAP(z) \
+{ \
+ Int32 zz, yy, tmp; \
+ zz = z; tmp = heap[zz]; \
+ while (True) { \
+ yy = zz << 1; \
+ if (yy > nHeap) break; \
+ if (yy < nHeap && \
+ weight[heap[yy+1]] < weight[heap[yy]]) \
+ yy++; \
+ if (weight[tmp] < weight[heap[yy]]) break; \
+ heap[zz] = heap[yy]; \
+ zz = yy; \
+ } \
+ heap[zz] = tmp; \
+}
+
+
+/*---------------------------------------------------*/
+void BZ2_hbMakeCodeLengths ( UChar *len,
+ Int32 *freq,
+ Int32 alphaSize,
+ Int32 maxLen )
+{
+ /*--
+ Nodes and heap entries run from 1. Entry 0
+ for both the heap and nodes is a sentinel.
+ --*/
+ Int32 nNodes, nHeap, n1, n2, i, j, k;
+ Bool tooLong;
+
+ Int32 heap [ BZ_MAX_ALPHA_SIZE + 2 ];
+ Int32 weight [ BZ_MAX_ALPHA_SIZE * 2 ];
+ Int32 parent [ BZ_MAX_ALPHA_SIZE * 2 ];
+
+ for (i = 0; i < alphaSize; i++)
+ weight[i+1] = (freq[i] == 0 ? 1 : freq[i]) << 8;
+
+ while (True) {
+
+ nNodes = alphaSize;
+ nHeap = 0;
+
+ heap[0] = 0;
+ weight[0] = 0;
+ parent[0] = -2;
+
+ for (i = 1; i <= alphaSize; i++) {
+ parent[i] = -1;
+ nHeap++;
+ heap[nHeap] = i;
+ UPHEAP(nHeap);
+ }
+
+ AssertH( nHeap < (BZ_MAX_ALPHA_SIZE+2), 2001 );
+
+ while (nHeap > 1) {
+ n1 = heap[1]; heap[1] = heap[nHeap]; nHeap--; DOWNHEAP(1);
+ n2 = heap[1]; heap[1] = heap[nHeap]; nHeap--; DOWNHEAP(1);
+ nNodes++;
+ parent[n1] = parent[n2] = nNodes;
+ weight[nNodes] = ADDWEIGHTS(weight[n1], weight[n2]);
+ parent[nNodes] = -1;
+ nHeap++;
+ heap[nHeap] = nNodes;
+ UPHEAP(nHeap);
+ }
+
+ AssertH( nNodes < (BZ_MAX_ALPHA_SIZE * 2), 2002 );
+
+ tooLong = False;
+ for (i = 1; i <= alphaSize; i++) {
+ j = 0;
+ k = i;
+ while (parent[k] >= 0) { k = parent[k]; j++; }
+ len[i-1] = j;
+ if (j > maxLen) tooLong = True;
+ }
+
+ if (! tooLong) break;
+
+ /* 17 Oct 04: keep-going condition for the following loop used
+ to be 'i < alphaSize', which missed the last element,
+ theoretically leading to the possibility of the compressor
+ looping. However, this count-scaling step is only needed if
+ one of the generated Huffman code words is longer than
+ maxLen, which up to and including version 1.0.2 was 20 bits,
+ which is extremely unlikely. In version 1.0.3 maxLen was
+ changed to 17 bits, which has minimal effect on compression
+ ratio, but does mean this scaling step is used from time to
+ time, enough to verify that it works.
+
+ This means that bzip2-1.0.3 and later will only produce
+ Huffman codes with a maximum length of 17 bits. However, in
+ order to preserve backwards compatibility with bitstreams
+ produced by versions pre-1.0.3, the decompressor must still
+ handle lengths of up to 20. */
+
+ for (i = 1; i <= alphaSize; i++) {
+ j = weight[i] >> 8;
+ j = 1 + (j / 2);
+ weight[i] = j << 8;
+ }
+ }
+}
+
+
+/*---------------------------------------------------*/
+void BZ2_hbAssignCodes ( Int32 *code,
+ UChar *length,
+ Int32 minLen,
+ Int32 maxLen,
+ Int32 alphaSize )
+{
+ Int32 n, vec, i;
+
+ vec = 0;
+ for (n = minLen; n <= maxLen; n++) {
+ for (i = 0; i < alphaSize; i++)
+ if (length[i] == n) { code[i] = vec; vec++; };
+ vec <<= 1;
+ }
+}
+
+
+/*---------------------------------------------------*/
+void BZ2_hbCreateDecodeTables ( Int32 *limit,
+ Int32 *base,
+ Int32 *perm,
+ UChar *length,
+ Int32 minLen,
+ Int32 maxLen,
+ Int32 alphaSize )
+{
+ Int32 pp, i, j, vec;
+
+ pp = 0;
+ for (i = minLen; i <= maxLen; i++)
+ for (j = 0; j < alphaSize; j++)
+ if (length[j] == i) { perm[pp] = j; pp++; };
+
+ for (i = 0; i < BZ_MAX_CODE_LEN; i++) base[i] = 0;
+ for (i = 0; i < alphaSize; i++) base[length[i]+1]++;
+
+ for (i = 1; i < BZ_MAX_CODE_LEN; i++) base[i] += base[i-1];
+
+ for (i = 0; i < BZ_MAX_CODE_LEN; i++) limit[i] = 0;
+ vec = 0;
+
+ for (i = minLen; i <= maxLen; i++) {
+ vec += (base[i+1] - base[i]);
+ limit[i] = vec-1;
+ vec <<= 1;
+ }
+ for (i = minLen + 1; i <= maxLen; i++)
+ base[i] = ((limit[i-1] + 1) << 1) - base[i];
+}
+
+
+/*-------------------------------------------------------------*/
+/*--- end huffman.c ---*/
+/*-------------------------------------------------------------*/
--- /dev/null
+
+/*-------------------------------------------------------------*/
+/*--- Table for randomising repetitive blocks ---*/
+/*--- randtable.c ---*/
+/*-------------------------------------------------------------*/
+
+/* ------------------------------------------------------------------
+ This file is part of bzip2/libbzip2, a program and library for
+ lossless, block-sorting data compression.
+
+ bzip2/libbzip2 version 1.0.6 of 6 September 2010
+ Copyright (C) 1996-2010 Julian Seward <jseward@bzip.org>
+
+ Please read the WARNING, DISCLAIMER and PATENTS sections in the
+ README file.
+
+ This program is released under the terms of the license contained
+ in the file LICENSE.
+ ------------------------------------------------------------------ */
+
+
+#include "bzlib_private.h"
+
+
+/*---------------------------------------------*/
+Int32 BZ2_rNums[512] = {
+ 619, 720, 127, 481, 931, 816, 813, 233, 566, 247,
+ 985, 724, 205, 454, 863, 491, 741, 242, 949, 214,
+ 733, 859, 335, 708, 621, 574, 73, 654, 730, 472,
+ 419, 436, 278, 496, 867, 210, 399, 680, 480, 51,
+ 878, 465, 811, 169, 869, 675, 611, 697, 867, 561,
+ 862, 687, 507, 283, 482, 129, 807, 591, 733, 623,
+ 150, 238, 59, 379, 684, 877, 625, 169, 643, 105,
+ 170, 607, 520, 932, 727, 476, 693, 425, 174, 647,
+ 73, 122, 335, 530, 442, 853, 695, 249, 445, 515,
+ 909, 545, 703, 919, 874, 474, 882, 500, 594, 612,
+ 641, 801, 220, 162, 819, 984, 589, 513, 495, 799,
+ 161, 604, 958, 533, 221, 400, 386, 867, 600, 782,
+ 382, 596, 414, 171, 516, 375, 682, 485, 911, 276,
+ 98, 553, 163, 354, 666, 933, 424, 341, 533, 870,
+ 227, 730, 475, 186, 263, 647, 537, 686, 600, 224,
+ 469, 68, 770, 919, 190, 373, 294, 822, 808, 206,
+ 184, 943, 795, 384, 383, 461, 404, 758, 839, 887,
+ 715, 67, 618, 276, 204, 918, 873, 777, 604, 560,
+ 951, 160, 578, 722, 79, 804, 96, 409, 713, 940,
+ 652, 934, 970, 447, 318, 353, 859, 672, 112, 785,
+ 645, 863, 803, 350, 139, 93, 354, 99, 820, 908,
+ 609, 772, 154, 274, 580, 184, 79, 626, 630, 742,
+ 653, 282, 762, 623, 680, 81, 927, 626, 789, 125,
+ 411, 521, 938, 300, 821, 78, 343, 175, 128, 250,
+ 170, 774, 972, 275, 999, 639, 495, 78, 352, 126,
+ 857, 956, 358, 619, 580, 124, 737, 594, 701, 612,
+ 669, 112, 134, 694, 363, 992, 809, 743, 168, 974,
+ 944, 375, 748, 52, 600, 747, 642, 182, 862, 81,
+ 344, 805, 988, 739, 511, 655, 814, 334, 249, 515,
+ 897, 955, 664, 981, 649, 113, 974, 459, 893, 228,
+ 433, 837, 553, 268, 926, 240, 102, 654, 459, 51,
+ 686, 754, 806, 760, 493, 403, 415, 394, 687, 700,
+ 946, 670, 656, 610, 738, 392, 760, 799, 887, 653,
+ 978, 321, 576, 617, 626, 502, 894, 679, 243, 440,
+ 680, 879, 194, 572, 640, 724, 926, 56, 204, 700,
+ 707, 151, 457, 449, 797, 195, 791, 558, 945, 679,
+ 297, 59, 87, 824, 713, 663, 412, 693, 342, 606,
+ 134, 108, 571, 364, 631, 212, 174, 643, 304, 329,
+ 343, 97, 430, 751, 497, 314, 983, 374, 822, 928,
+ 140, 206, 73, 263, 980, 736, 876, 478, 430, 305,
+ 170, 514, 364, 692, 829, 82, 855, 953, 676, 246,
+ 369, 970, 294, 750, 807, 827, 150, 790, 288, 923,
+ 804, 378, 215, 828, 592, 281, 565, 555, 710, 82,
+ 896, 831, 547, 261, 524, 462, 293, 465, 502, 56,
+ 661, 821, 976, 991, 658, 869, 905, 758, 745, 193,
+ 768, 550, 608, 933, 378, 286, 215, 979, 792, 961,
+ 61, 688, 793, 644, 986, 403, 106, 366, 905, 644,
+ 372, 567, 466, 434, 645, 210, 389, 550, 919, 135,
+ 780, 773, 635, 389, 707, 100, 626, 958, 165, 504,
+ 920, 176, 193, 713, 857, 265, 203, 50, 668, 108,
+ 645, 990, 626, 197, 510, 357, 358, 850, 858, 364,
+ 936, 638
+};
+
+
+/*-------------------------------------------------------------*/
+/*--- end randtable.c ---*/
+/*-------------------------------------------------------------*/
--- /dev/null
+#!/usr/bin/perl
+
+=head1 NAME
+
+pristine-bz2 - regenerate pristine bz2 files
+
+=head1 SYNOPSIS
+
+B<pristine-bz2> [-vdk] gendelta I<file.bz2> I<delta>
+
+B<pristine-bz2> [-vdk] genbz2 I<delta> I<file>
+
+=head1 DESCRIPTION
+
+This is a complement to the pristine-tar(1) command. Normally you
+don't need to run it by hand, since pristine-tar calls it as necessary
+to handle .tar.bz2 files.
+
+pristine-bz2 gendelta takes the specified I<bz2> file, and generates a
+small binary I<delta> file that can later be used by pristine-bz2 genbz2
+to recreate the original file.
+
+pristine-bz2 genbz2 takes the specified I<delta> file, and compresses the
+specified input I<file> (which must be identical to the contents of the
+original bz2 file). The resulting file will be identical to
+the original gz file used to create the delta.
+
+The approach used to regenerate the original bz2 file is to figure out
+how it was produced -- what compression level was used, whether it was
+built with bzip2(1) or with pbzip2(1).
+
+Note that other tools exist, like bzip2smp or dbzip2, but they are
+said to be bit-identical with bzip2. Anyway, bzip2 looks like the most
+widespread implementation, so it's hard to find bzip2 files that make
+pristine-bz2 fail. Please report!
+
+The deprecated bzip1 compression method hasn't been implemented.
+
+If the delta filename is "-", pristine-bz2 reads or writes it to stdio.
+
+=head1 OPTIONS
+
+=over 4
+
+=item -v
+
+Verbose mode, show each command that is run.
+
+=item -d
+
+Debug mode.
+
+=item -k
+
+Don't clean up the temporary directory on exit.
+
+=item -t
+
+Try harder to determine how to generate deltas of difficult bz2 files.
+
+=back
+
+=head1 ENVIRONMENT
+
+=over 4
+
+=item B<TMPDIR>
+
+Specifies a location to place temporary files, other than the default.
+
+=back
+
+=head1 AUTHOR
+
+Joey Hess <joeyh@debian.org>,
+Faidon Liambotis <paravoid@debian.org>,
+Cyril Brulebois <cyril.brulebois@enst-bretagne.fr>
+
+Licensed under the GPL, version 2.
+
+=cut
+
+use warnings;
+use strict;
+use Pristine::Tar;
+use Pristine::Tar::Delta;
+use Pristine::Tar::Formats;
+use File::Basename qw/basename/;
+use IO::Handle;
+
+delete $ENV{BZIP};
+delete $ENV{BZIP2};
+
+my @supported_bzip2_programs = qw(bzip2 pbzip2 zgz);
+
+my $try=0;
+
+dispatch(
+ commands => {
+ usage => [\&usage],
+ genbz2 => [\&genbz2, 2],
+ gendelta => [\&gendelta, 2],
+ },
+ options => {
+ "t|try!" => \$try,
+ },
+);
+
+sub usage {
+ print STDERR "Usage: pristine-bz2 [-vdkt] gendelta file.bz2 delta\n";
+ print STDERR " pristine-bz2 [-vdkt] genbz2 delta file\n";
+}
+
+sub readbzip2 {
+ my $filename = shift;
+
+ if (! is_bz2($filename)) {
+ error "This is not a valid BZip2 archive.";
+ }
+
+ open(BZIP2, "< $filename")
+ or die("Could not open '$filename' for reading: $!\n");
+
+ my $chars;
+ if (read(BZIP2, $chars, 4) != 4) {
+ die("Unable to read from input\n");
+ }
+
+ my ($id1, $id2, $method, $level)
+ = unpack("CCCC", $chars);
+ # we actually want the value, not the ascii position
+ $level-=48;
+
+ if ($level !~ /^[1-9]$/) {
+ error "Unknown compression level $level\n";
+ }
+
+ close(BZIP2);
+
+ return ($level);
+}
+
+sub predictbzip2args {
+ my ($level, $program) = @_;
+
+ my @args=["-$level"];
+
+ if ($program eq 'zgz') {
+ @args=["-$level", "--old-bzip2"];
+ push @args, ["-$level", "--suse-bzip2"];
+ push @args, ["-$level", "--suse-pbzip2"];
+ }
+
+ return @args;
+}
+
+sub testvariant {
+ my ($old, $tmpin, $bzip2_program, @args) = @_;
+
+ # some compressors eat the uncompressed file, some
+ # do not; restore as needed. (Note that file name,
+ # mode, mtime do not matter to bzip2.)
+ if (! -e $tmpin) {
+ doit("cp", "$tmpin.bak", "$tmpin");
+ }
+
+ my $new=$tmpin.'.bz2';
+ unlink($new);
+
+ # try bzip2'ing with the arguments passed
+ if ($bzip2_program ne 'zgz') {
+ doit($bzip2_program, @args, $tmpin);
+ }
+ else {
+ doit_redir($tmpin, $new, $bzip2_program, @args);
+ }
+ unless (-e $new) {
+ die("$bzip2_program failed, aborting");
+ }
+
+ # and compare the generated with the original
+ return !comparefiles($old, $new);
+}
+
+sub reproducebzip2 {
+ my $orig=shift;
+
+ my $wd=tempdir();
+
+ my $tmpin="$wd/test";
+ doit_redir($orig, "$tmpin.bak", "bzip2", "-dc");
+
+ # read fields from bzip2 headers
+ my ($level) = readbzip2($orig);
+ debug("level: $level");
+
+ foreach my $program (@supported_bzip2_programs) {
+ # try to guess the bzip2 arguments that are needed by the
+ # header information
+ foreach my $args (predictbzip2args($level, $program)) {
+ testvariant($orig, $tmpin, $program, @$args)
+ && return $program, @$args;
+ }
+ }
+
+ # 7z has a weird syntax, not supported yet, as not seen in the wild
+ #testvariant($orig, $tmpin, "7z", "-mx$level", "a", "$tmpin.bz2")
+ # && return "7z", "-mx$level", "a" ; # XXX need to include outfile
+
+ # pbzip2 -b option affects output, but cannot be detected from a
+ # header.
+ if ($try) {
+ my @args = @{predictbzip2args($level, "pbzip2")->[0]};
+ print STDERR "pristine-bz2 will have to try especially hard to reproduce $orig\n";
+ print STDERR "(This could take a long time.)\n";
+ my %tried;
+ $tried{9}=1; # default
+ # Try searching for likely candidates first, and fill in.
+ # It could go higher than 100, but have to stop somewhere.
+ STDERR->autoflush(1);
+ foreach my $try (1..10,
+ 15, 20, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95,
+ 1..100) {
+ next if $tried{$try};
+ $tried{$try}=1;
+ print STDERR "\r\tblock size: $try ";
+ testvariant($orig, $tmpin, "pbzip2", "-b${try}", @args) &&
+ return "pbzip2", "-b${try}", @args;
+ }
+ print STDERR "\n";
+ }
+
+ print STDERR "pristine-bz2 failed to reproduce build of $orig\n";
+ print STDERR "(Please file a bug report.)\n";
+ exit 1;
+}
+
+sub genbz2 {
+ my $deltafile=shift;
+ my $file=shift;
+
+ my $delta=Pristine::Tar::Delta::read(Tarball => $deltafile);
+ Pristine::Tar::Delta::assert($delta, type => "bz2", maxversion => 2,
+ fields => [qw{params program}]);
+
+ my @params=split(' ', $delta->{params});
+ while (@params) {
+ my $param=shift @params;
+
+ next if $param=~/^(-[1-9])$/;
+ next if $param eq '--old-bzip2';
+ next if $param eq '--suse-bzip2';
+ next if $param eq '--suse-pbzip2';
+ die "paranoia check failed on params from delta (@params)";
+ }
+ @params=split(' ', $delta->{params});
+
+ my $program=$delta->{program};
+ if (! grep { $program eq $_ } @supported_bzip2_programs) {
+ die "paranoia check failed on program from delta ($program)";
+ }
+
+ if ($program eq 'zgz') {
+ # unlike bzip2, zgz only uses stdio
+ doit_redir($file, "$file.bz2", $program, @params);
+ }
+ else {
+ doit($program, @params, $file);
+ }
+ doit("rm", "-f", $file);
+}
+
+sub gendelta {
+ my $bzip2file=shift;
+ my $deltafile=shift;
+
+ my ($program, @params) = reproducebzip2($bzip2file);
+
+ Pristine::Tar::Delta::write(Tarball => $deltafile, {
+ version => '2.0',
+ type => 'bz2',
+ params => "@params",
+ program => $program,
+ });
+}
--- /dev/null
+.\" Automatically generated by Pod::Man 2.25 (Pod::Simple 3.16)
+.\"
+.\" Standard preamble:
+.\" ========================================================================
+.de Sp \" Vertical space (when we can't use .PP)
+.if t .sp .5v
+.if n .sp
+..
+.de Vb \" Begin verbatim text
+.ft CW
+.nf
+.ne \\$1
+..
+.de Ve \" End verbatim text
+.ft R
+.fi
+..
+.\" Set up some character translations and predefined strings. \*(-- will
+.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left
+.\" double quote, and \*(R" will give a right double quote. \*(C+ will
+.\" give a nicer C++. Capital omega is used to do unbreakable dashes and
+.\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff,
+.\" nothing in troff, for use with C<>.
+.tr \(*W-
+.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
+.ie n \{\
+. ds -- \(*W-
+. ds PI pi
+. if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch
+. if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch
+. ds L" ""
+. ds R" ""
+. ds C` ""
+. ds C' ""
+'br\}
+.el\{\
+. ds -- \|\(em\|
+. ds PI \(*p
+. ds L" ``
+. ds R" ''
+'br\}
+.\"
+.\" Escape single quotes in literal strings from groff's Unicode transform.
+.ie \n(.g .ds Aq \(aq
+.el .ds Aq '
+.\"
+.\" If the F register is turned on, we'll generate index entries on stderr for
+.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
+.\" entries marked with X<> in POD. Of course, you'll have to process the
+.\" output yourself in some meaningful fashion.
+.ie \nF \{\
+. de IX
+. tm Index:\\$1\t\\n%\t"\\$2"
+..
+. nr % 0
+. rr F
+.\}
+.el \{\
+. de IX
+..
+.\}
+.\"
+.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
+.\" Fear. Run. Save yourself. No user-serviceable parts.
+. \" fudge factors for nroff and troff
+.if n \{\
+. ds #H 0
+. ds #V .8m
+. ds #F .3m
+. ds #[ \f1
+. ds #] \fP
+.\}
+.if t \{\
+. ds #H ((1u-(\\\\n(.fu%2u))*.13m)
+. ds #V .6m
+. ds #F 0
+. ds #[ \&
+. ds #] \&
+.\}
+. \" simple accents for nroff and troff
+.if n \{\
+. ds ' \&
+. ds ` \&
+. ds ^ \&
+. ds , \&
+. ds ~ ~
+. ds /
+.\}
+.if t \{\
+. ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u"
+. ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u'
+. ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u'
+. ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u'
+. ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u'
+. ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u'
+.\}
+. \" troff and (daisy-wheel) nroff accents
+.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V'
+.ds 8 \h'\*(#H'\(*b\h'-\*(#H'
+.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#]
+.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H'
+.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u'
+.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
+.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
+.ds ae a\h'-(\w'a'u*4/10)'e
+.ds Ae A\h'-(\w'A'u*4/10)'E
+. \" corrections for vroff
+.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
+.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
+. \" for low resolution devices (crt and lpr)
+.if \n(.H>23 .if \n(.V>19 \
+\{\
+. ds : e
+. ds 8 ss
+. ds o a
+. ds d- d\h'-1'\(ga
+. ds D- D\h'-1'\(hy
+. ds th \o'bp'
+. ds Th \o'LP'
+. ds ae ae
+. ds Ae AE
+.\}
+.rm #[ #] #H #V #F C
+.\" ========================================================================
+.\"
+.IX Title "PRISTINE-BZ2 1"
+.TH PRISTINE-BZ2 1 "2012-08-27" "perl v5.14.2" "pristine-bz2"
+.\" For nroff, turn off justification. Always turn off hyphenation; it makes
+.\" way too many mistakes in technical documents.
+.if n .ad l
+.nh
+.SH "NAME"
+pristine\-bz2 \- regenerate pristine bz2 files
+.SH "SYNOPSIS"
+.IX Header "SYNOPSIS"
+\&\fBpristine\-bz2\fR [\-vdk] gendelta \fIfile.bz2\fR \fIdelta\fR
+.PP
+\&\fBpristine\-bz2\fR [\-vdk] genbz2 \fIdelta\fR \fIfile\fR
+.SH "DESCRIPTION"
+.IX Header "DESCRIPTION"
+This is a complement to the \fIpristine\-tar\fR\|(1) command. Normally you
+don't need to run it by hand, since pristine-tar calls it as necessary
+to handle .tar.bz2 files.
+.PP
+pristine\-bz2 gendelta takes the specified \fIbz2\fR file, and generates a
+small binary \fIdelta\fR file that can later be used by pristine\-bz2 genbz2
+to recreate the original file.
+.PP
+pristine\-bz2 genbz2 takes the specified \fIdelta\fR file, and compresses the
+specified input \fIfile\fR (which must be identical to the contents of the
+original bz2 file). The resulting file will be identical to
+the original gz file used to create the delta.
+.PP
+The approach used to regenerate the original bz2 file is to figure out
+how it was produced \*(-- what compression level was used, whether it was
+built with \fIbzip2\fR\|(1) or with \fIpbzip2\fR\|(1).
+.PP
+Note that other tools exist, like bzip2smp or dbzip2, but they are
+said to be bit-identical with bzip2. Anyway, bzip2 looks like the most
+widespread implementation, so it's hard to find bzip2 files that make
+pristine\-bz2 fail. Please report!
+.PP
+The deprecated bzip1 compression method hasn't been implemented.
+.PP
+If the delta filename is \*(L"\-\*(R", pristine\-bz2 reads or writes it to stdio.
+.SH "OPTIONS"
+.IX Header "OPTIONS"
+.IP "\-v" 4
+.IX Item "-v"
+Verbose mode, show each command that is run.
+.IP "\-d" 4
+.IX Item "-d"
+Debug mode.
+.IP "\-k" 4
+.IX Item "-k"
+Don't clean up the temporary directory on exit.
+.IP "\-t" 4
+.IX Item "-t"
+Try harder to determine how to generate deltas of difficult bz2 files.
+.SH "ENVIRONMENT"
+.IX Header "ENVIRONMENT"
+.IP "\fB\s-1TMPDIR\s0\fR" 4
+.IX Item "TMPDIR"
+Specifies a location to place temporary files, other than the default.
+.SH "AUTHOR"
+.IX Header "AUTHOR"
+Joey Hess <joeyh@debian.org>,
+Faidon Liambotis <paravoid@debian.org>,
+Cyril Brulebois <cyril.brulebois@enst\-bretagne.fr>
+.PP
+Licensed under the \s-1GPL\s0, version 2.
--- /dev/null
+#!/usr/bin/perl
+
+=head1 NAME
+
+pristine-gz - regenerate pristine gz files
+
+=head1 SYNOPSIS
+
+B<pristine-gz> [-vdk] gendelta I<file.gz> I<delta>
+
+B<pristine-gz> [-vdk] gengz I<delta> I<file>
+
+=head1 DESCRIPTION
+
+This is a complement to the pristine-tar(1) command. Normally you don't
+need to run it by hand, since pristine-tar calls it as necessary to handle
+.tar.gz files.
+
+pristine-gz gendelta takes the specified I<gz> file, and generates a
+small binary I<delta> file that can later be used by pristine-gz gengz
+to recreate the original file.
+
+pristine-gz gengz takes the specified I<delta> file, and compresses
+the specified input I<file> (which must be identical to the contents
+of the original gz file). The resulting file will be identical to
+the original gz file used to create the delta.
+
+The approach used to regenerate the original gz file is to figure out how
+it was produced -- what compression level was used, whether it was built
+with GNU gzip(1) or with a library or BSD version, whether the --rsyncable
+option was used, etc, and to reproduce this build environment when
+regenerating the gz.
+
+This approach will work for about 99.5% of cases. One example of a case it
+cannot currently support is a gz file that has been produced by appending
+together multiple gz files.
+
+For the few where it doesn't work, a binary diff will be included in the
+delta between the closest regneratable gz file and the original. In
+the worst case, the diff will include the entire content of the original
+gz file, resulting in a larger than usual delta. If the delta is much
+larger than usual, pristine-gz will print a warning.
+
+If the delta filename is "-", pristine-gz reads or writes it to stdio.
+
+=head1 OPTIONS
+
+=over 4
+
+=item -v
+
+=item --verbose
+
+Verbose mode, show each command that is run.
+
+=item -d
+
+=item --debug
+
+Debug mode.
+
+=item -k
+
+=item --keep
+
+Don't clean up the temporary directory on exit.
+
+=back
+
+=head1 ENVIRONMENT
+
+=over 4
+
+=item B<TMPDIR>
+
+Specifies a location to place temporary files, other than the default.
+
+=back
+
+=head1 AUTHOR
+
+Joey Hess <joeyh@debian.org>,
+Faidon Liambotis <paravoid@debian.org>
+Josh Triplett <josh@joshtriplett.org>
+
+Licensed under the GPL, version 2.
+
+=cut
+
+use warnings;
+use strict;
+use Pristine::Tar;
+use Pristine::Tar::Delta;
+use Pristine::Tar::Formats;
+use File::Basename qw/basename/;
+
+delete $ENV{GZIP};
+
+dispatch(
+ commands => {
+ usage => [\&usage],
+ gendelta => [\&gendelta, 2],
+ gengz => [\&gengz, 2],
+ },
+);
+
+sub usage {
+ print STDERR "Usage: pristine-gz [-vdk] gendelta file.gz delta\n";
+ print STDERR " pristine-gz [-vdk] gengz delta file\n";
+}
+
+sub readgzip {
+ my $filename = shift;
+
+ if (! is_gz($filename)) {
+ error "This is not a valid GZip archive.";
+ }
+
+ open(GZIP, "< $filename")
+ or die("Could not open '$filename' for reading: $!\n");
+
+ my $chars;
+ if (read(GZIP, $chars, 10) != 10) {
+ die("Unable to read 10 bytes from input\n");
+ }
+
+ my ($id1, $id2, $method, $flags, $timestamp, $level, $os, $name)
+ = (unpack("CCCb8VCC", $chars), '');
+
+ my @flags = split(//, $flags);
+
+ if ($flags[$fconstants{GZIP_FLAG_FNAME}]) {
+ # read a null-terminated string
+ $name .= $chars
+ while (read(GZIP, $chars, 1) == 1 && ord($chars) != 0);
+ }
+ close(GZIP);
+
+ return (\@flags, $timestamp, $level, $os, $name);
+}
+
+sub predictgzipargs {
+ my ($flags, $timestamp, $level) = @_;
+ my @flags = @$flags;
+
+ my @args;
+ unless ($flags[$fconstants{GZIP_FLAG_FNAME}]) {
+ push @args, '-n';
+ push @args, '-M' if $timestamp;
+ }
+
+ if ($level == $fconstants{GZIP_COMPRESSION_BEST}) {
+ push @args, '-9'
+ }
+ elsif ($level == $fconstants{GZIP_COMPRESSION_FAST}) {
+ push @args, '-1'
+ }
+
+ return @args;
+}
+
+sub reproducegz {
+ my ($orig, $tempdir, $tempin) = @_;
+ my $tempout="$tempdir/test.gz";
+ doit_redir($orig, $tempin, "gzip", "-dc");
+
+ # read fields from gzip headers
+ my ($flags, $timestamp, $level, $os, $name) = readgzip($orig);
+ debug("flags: [".join(", ", @$flags).
+ "] timestamp: $timestamp level: $level os: $os name: $name");
+
+ # try to guess the gzip arguments that are needed by the header
+ # information
+ my @args = predictgzipargs($flags, $timestamp, $level);
+ my @extraargs = ("-F", $name, "-T", $timestamp);
+
+ my @try;
+
+ if ($os == $fconstants{GZIP_OS_UNIX}) {
+ # for 98% of the cases the simple heuristic above works
+ # and it was produced by gnu gzip.
+ push @try, ['--gnu', @args];
+ push @try, ['--gnu', @args, '--rsyncable'];
+ push @try, ['--gnu', @args, '--new-rsyncable'];
+ }
+
+ if ($name =~ /\//) {
+ push @args, "--original-name", $name;
+ @extraargs = ("-T", $timestamp);
+ $name = basename($name);
+ }
+
+ # set the Operating System flag to the one found in the original
+ # archive
+ push @args, ("--osflag", $os) if $os != $fconstants{GZIP_OS_UNIX};
+
+ # many of the .gz out there are created using the BSD version of
+ # gzip which is using the zlib library; try with our version of
+ # bsd-gzip with added support for the undocumented GNU gzip options
+ # -m and -M
+ push @try, [@args];
+
+ # Perl's Compress::Raw::Zlib interfaces directly with zlib and
+ # apparently is the only implementation out there which tunes a very
+ # specific parameter of zlib, memLevel, to 9, instead of 8 which is
+ # the default. The module is used, among others, by Compress::Gzip
+ # which in turn is used by IO::Zlib. It was found on the real world on
+ # tarballs generated by Perl 5.10's Module::Build (cf. #618284)
+ push @try, [@args, '--quirk', 'perl'];
+ push @try, [@args, '--quirk', 'perl', '-1'];
+
+ # apparently, there is an old version of bsd-gzip (or a similar tool
+ # based on zlib) that creates gz using maximum compression (-9) but
+ # does not indicate so in the headers. surprisingly, there are many
+ # .gz out there.
+ push @try, [@args, '--quirk', 'buggy-bsd'];
+
+ # Windows' NTFS gzip implementation; quirk is really really evil
+ # it should be the last test: it can result in a corrupted archive!
+ if ($os == $fconstants{GZIP_OS_NTFS}) {
+ pop @args; pop @args; # ntfs quirk implies NTFS osflag
+ push @try, [@args, '--quirk', 'ntfs'];
+ }
+
+ my $origsize=(stat($orig))[7];
+ my ($bestvariant, $bestsize);
+
+ foreach my $variant (@try) {
+ doit_redir($tempin, $tempout, 'zgz', @$variant, @extraargs, '-c');
+ if (!comparefiles($orig, $tempout)) {
+ # success
+ return $name, $timestamp, undef, @$variant;
+ }
+ else {
+ # generate a binary delta and see if this is the
+ # best variant so far
+ my $ret=system("xdelta delta -0 --pristine $tempout $orig $tempdir/tmpdelta 2>/dev/null") >> 8;
+ # xdelta exits 1 on success
+ if ($ret == 1) {
+ my $size=(stat("$tempdir/tmpdelta"))[7];
+ if (! defined $bestsize || $size < $bestsize) {
+ $bestvariant = $variant;
+ $bestsize=$size;
+ rename("$tempdir/tmpdelta", "$tempdir/bestdelta") || die "rename: $!";
+ }
+ }
+ }
+ }
+
+ # Nothing worked perfectly, so use the delta that was generated for
+ # the best variant
+ my $percentover=100 - int (($origsize-$bestsize)/$origsize*100);
+ debug("Using delta to best variant, bloating $percentover%: @$bestvariant");
+ if ($percentover > 10) {
+ print STDERR "warning: pristine-gz cannot reproduce build of $orig; ";
+ if ($percentover >= 100) {
+ print STDERR "storing entire file in delta!\n";
+ }
+ else {
+ print STDERR "storing $percentover% size diff in delta\n";
+ }
+ print STDERR "(Please consider filing a bug report so the delta size can be improved.)\n";
+ }
+ return $name, $timestamp, "$tempdir/bestdelta", @$bestvariant;
+}
+
+sub gengz {
+ my $deltafile=shift;
+ my $file=shift;
+
+ my $delta=Pristine::Tar::Delta::read(Tarball => $deltafile);
+ Pristine::Tar::Delta::assert($delta, type => "gz", maxversion => 3,
+ fields => [qw{params filename timestamp}]);
+
+ my @params=split(' ', $delta->{params});
+ while (@params) {
+ $_=shift @params;
+ next if /^(--gnu|--rsyncable|--new-rsyncable|-[nmM1-9])$/;
+ if (/^(--original-name|--quirk|--osflag)$/) {
+ shift @params;
+ next;
+ }
+ die "paranoia check failed on params from delta (@params)";
+ }
+ @params=split(' ', $delta->{params});
+
+ my $filename=$delta->{filename};
+ $filename=~s/^.*\///; # basename isn't strong enough
+
+ my @zgz=("zgz", @params, "-T", $delta->{timestamp});
+ if (! grep { $_ eq "--original-name" } @params) {
+ push @zgz, "-F", $filename;
+ }
+ push @zgz, "-c";
+
+ if (exists $delta->{delta}) {
+ my $tempdir=tempdir();
+ my $tfile="$tempdir/".basename($file).".gz";
+ doit_redir($file, $tfile, @zgz);
+ doit("xdelta", "patch", "--pristine", $delta->{delta}, $tfile, "$file.gz");
+ }
+ else {
+ doit_redir("$file", "$file.gz", @zgz);
+ }
+ doit("rm", "-f", $file);
+}
+
+sub gendelta {
+ my $gzfile=shift;
+ my $deltafile=shift;
+
+ my $tempdir=tempdir();
+ my ($filename, $timestamp, $xdelta, @params)=
+ reproducegz($gzfile, $tempdir, "$tempdir/test");
+
+ Pristine::Tar::Delta::write(Tarball => $deltafile, {
+ version => (defined $xdelta ? "3.0" : "2.0"),
+ type => 'gz',
+ params => "@params",
+ filename => basename($filename),
+ timestamp => $timestamp,
+ (defined $xdelta ? (delta => $xdelta) : ()),
+ });
+}
+
--- /dev/null
+.\" Automatically generated by Pod::Man 2.25 (Pod::Simple 3.16)
+.\"
+.\" Standard preamble:
+.\" ========================================================================
+.de Sp \" Vertical space (when we can't use .PP)
+.if t .sp .5v
+.if n .sp
+..
+.de Vb \" Begin verbatim text
+.ft CW
+.nf
+.ne \\$1
+..
+.de Ve \" End verbatim text
+.ft R
+.fi
+..
+.\" Set up some character translations and predefined strings. \*(-- will
+.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left
+.\" double quote, and \*(R" will give a right double quote. \*(C+ will
+.\" give a nicer C++. Capital omega is used to do unbreakable dashes and
+.\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff,
+.\" nothing in troff, for use with C<>.
+.tr \(*W-
+.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
+.ie n \{\
+. ds -- \(*W-
+. ds PI pi
+. if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch
+. if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch
+. ds L" ""
+. ds R" ""
+. ds C` ""
+. ds C' ""
+'br\}
+.el\{\
+. ds -- \|\(em\|
+. ds PI \(*p
+. ds L" ``
+. ds R" ''
+'br\}
+.\"
+.\" Escape single quotes in literal strings from groff's Unicode transform.
+.ie \n(.g .ds Aq \(aq
+.el .ds Aq '
+.\"
+.\" If the F register is turned on, we'll generate index entries on stderr for
+.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
+.\" entries marked with X<> in POD. Of course, you'll have to process the
+.\" output yourself in some meaningful fashion.
+.ie \nF \{\
+. de IX
+. tm Index:\\$1\t\\n%\t"\\$2"
+..
+. nr % 0
+. rr F
+.\}
+.el \{\
+. de IX
+..
+.\}
+.\"
+.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
+.\" Fear. Run. Save yourself. No user-serviceable parts.
+. \" fudge factors for nroff and troff
+.if n \{\
+. ds #H 0
+. ds #V .8m
+. ds #F .3m
+. ds #[ \f1
+. ds #] \fP
+.\}
+.if t \{\
+. ds #H ((1u-(\\\\n(.fu%2u))*.13m)
+. ds #V .6m
+. ds #F 0
+. ds #[ \&
+. ds #] \&
+.\}
+. \" simple accents for nroff and troff
+.if n \{\
+. ds ' \&
+. ds ` \&
+. ds ^ \&
+. ds , \&
+. ds ~ ~
+. ds /
+.\}
+.if t \{\
+. ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u"
+. ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u'
+. ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u'
+. ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u'
+. ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u'
+. ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u'
+.\}
+. \" troff and (daisy-wheel) nroff accents
+.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V'
+.ds 8 \h'\*(#H'\(*b\h'-\*(#H'
+.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#]
+.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H'
+.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u'
+.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
+.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
+.ds ae a\h'-(\w'a'u*4/10)'e
+.ds Ae A\h'-(\w'A'u*4/10)'E
+. \" corrections for vroff
+.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
+.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
+. \" for low resolution devices (crt and lpr)
+.if \n(.H>23 .if \n(.V>19 \
+\{\
+. ds : e
+. ds 8 ss
+. ds o a
+. ds d- d\h'-1'\(ga
+. ds D- D\h'-1'\(hy
+. ds th \o'bp'
+. ds Th \o'LP'
+. ds ae ae
+. ds Ae AE
+.\}
+.rm #[ #] #H #V #F C
+.\" ========================================================================
+.\"
+.IX Title "PRISTINE-GZ 1"
+.TH PRISTINE-GZ 1 "2012-03-18" "perl v5.14.2" "pristine-gz"
+.\" For nroff, turn off justification. Always turn off hyphenation; it makes
+.\" way too many mistakes in technical documents.
+.if n .ad l
+.nh
+.SH "NAME"
+pristine\-gz \- regenerate pristine gz files
+.SH "SYNOPSIS"
+.IX Header "SYNOPSIS"
+\&\fBpristine-gz\fR [\-vdk] gendelta \fIfile.gz\fR \fIdelta\fR
+.PP
+\&\fBpristine-gz\fR [\-vdk] gengz \fIdelta\fR \fIfile\fR
+.SH "DESCRIPTION"
+.IX Header "DESCRIPTION"
+This is a complement to the \fIpristine\-tar\fR\|(1) command. Normally you don't
+need to run it by hand, since pristine-tar calls it as necessary to handle
+\&.tar.gz files.
+.PP
+pristine-gz gendelta takes the specified \fIgz\fR file, and generates a
+small binary \fIdelta\fR file that can later be used by pristine-gz gengz
+to recreate the original file.
+.PP
+pristine-gz gengz takes the specified \fIdelta\fR file, and compresses
+the specified input \fIfile\fR (which must be identical to the contents
+of the original gz file). The resulting file will be identical to
+the original gz file used to create the delta.
+.PP
+The approach used to regenerate the original gz file is to figure out how
+it was produced \*(-- what compression level was used, whether it was built
+with \s-1GNU\s0 \fIgzip\fR\|(1) or with a library or \s-1BSD\s0 version, whether the \-\-rsyncable
+option was used, etc, and to reproduce this build environment when
+regenerating the gz.
+.PP
+This approach will work for about 99.5% of cases. One example of a case it
+cannot currently support is a gz file that has been produced by appending
+together multiple gz files.
+.PP
+For the few where it doesn't work, a binary diff will be included in the
+delta between the closest regneratable gz file and the original. In
+the worst case, the diff will include the entire content of the original
+gz file, resulting in a larger than usual delta. If the delta is much
+larger than usual, pristine-gz will print a warning.
+.PP
+If the delta filename is \*(L"\-\*(R", pristine-gz reads or writes it to stdio.
+.SH "OPTIONS"
+.IX Header "OPTIONS"
+.IP "\-v" 4
+.IX Item "-v"
+.PD 0
+.IP "\-\-verbose" 4
+.IX Item "--verbose"
+.PD
+Verbose mode, show each command that is run.
+.IP "\-d" 4
+.IX Item "-d"
+.PD 0
+.IP "\-\-debug" 4
+.IX Item "--debug"
+.PD
+Debug mode.
+.IP "\-k" 4
+.IX Item "-k"
+.PD 0
+.IP "\-\-keep" 4
+.IX Item "--keep"
+.PD
+Don't clean up the temporary directory on exit.
+.SH "ENVIRONMENT"
+.IX Header "ENVIRONMENT"
+.IP "\fB\s-1TMPDIR\s0\fR" 4
+.IX Item "TMPDIR"
+Specifies a location to place temporary files, other than the default.
+.SH "AUTHOR"
+.IX Header "AUTHOR"
+Joey Hess <joeyh@debian.org>,
+Faidon Liambotis <paravoid@debian.org>
+Josh Triplett <josh@joshtriplett.org>
+.PP
+Licensed under the \s-1GPL\s0, version 2.
--- /dev/null
+#!/usr/bin/perl
+
+=head1 NAME
+
+pristine-tar - regenerate pristine tarballs
+
+=head1 SYNOPSIS
+
+B<pristine-tar> [-vdk] gendelta I<tarball> I<delta>
+
+B<pristine-tar> [-vdk] gentar I<delta> I<tarball>
+
+B<pristine-tar> [-vdk] [-m message] commit I<tarball> [I<upstream>]
+
+B<pristine-tar> [-vdk] checkout I<tarball>
+
+B<pristine-tar> [-vdk] list
+
+=head1 DESCRIPTION
+
+pristine-tar can regenerate an exact copy of a pristine upstream tarball
+using only a small binary I<delta> file and the contents of the tarball,
+which are typically kept in an I<upstream> branch in version control.
+
+The I<delta> file is designed to be checked into version control along-side
+the I<upstream> branch, thus allowing Debian packages to be built entirely
+using sources in version control, without the need to keep copies of
+upstream tarballs.
+
+pristine-tar supports compressed tarballs, calling out to pristine-gz(1),
+pristine-bz2(1), and pristine-xz(1) to produce the pristine gzip, bzip2,
+and xz files.
+
+=head1 COMMANDS
+
+=over 4
+
+=item pristine-tar gendelta I<tarball> I<delta>
+
+This takes the specified upstream I<tarball>, and generates a small binary
+delta file that can later be used by pristine-tar gentar to recreate the
+tarball.
+
+If the delta filename is "-", it is written to standard output.
+
+=item pristine-tar gentar I<delta> I<tarball>
+
+This takes the specified I<delta> file, and the files in the current
+directory, which must have identical content to those in the upstream
+tarball, and uses these to regenerate the pristine upstream I<tarball>.
+
+If the delta filename is "-", it is read from standard input.
+
+=item pristine-tar commit I<tarball> [I<upstream>]
+
+B<pristine-tar commit> generates a pristine-tar delta file for the specified
+I<tarball>, and commits it to version control. The B<pristine-tar checkout>
+command can later be used to recreate the original tarball based only
+on the information stored in version control.
+
+The I<upstream> parameter specifies the tag or branch that contains the
+same content that is present in the tarball. This defaults to
+"refs/heads/upstream", or if there's no such branch, any
+branch matching "upstream". The name of the tree it points to will be
+recorded for later use by B<pristine-tar checkout>. Note that the content
+does not need to be 100% identical to the content of the tarball, but
+if it is not, additional space will be used in the delta file.
+
+The delta files are stored in a branch named "pristine-tar", with filenames
+corresponding to the input tarball, with ".delta" appended. This
+branch is created or updated as needed to add each new delta.
+
+=item pristine-tar checkout I<tarball>
+
+This regenerates a copy of the specified I<tarball> using information
+previously saved in version control by B<pristine-tar commit>.
+
+=item pristine-tar list
+
+This lists tarballs that pristine-tar is able to checkout from version
+control.
+
+=back
+
+=head1 OPTIONS
+
+=over 4
+
+=item -v
+
+=item --verbose
+
+Verbose mode, show each command that is run.
+
+=item -d
+
+=item --debug
+
+Debug mode.
+
+=item -k
+
+=item --keep
+
+Don't clean up the temporary directory on exit.
+
+=item -m message
+
+=item --message=message
+
+Use this option to specify a custom commit message to pristine-tar commit.
+
+=back
+
+=head1 EXAMPLES
+
+Suppose you maintain the hello package, in a git repository. You have
+just created a tarball of the release, I<hello-1.0.tar.gz>, which you
+will upload to a "forge" site.
+
+You want to ensure that, if the "forge" loses the tarball, you can always
+recreate exactly that same tarball. And you'd prefer not to keep copies
+of tarballs for every release, as that could use a lot of disk space
+when hello gets the background mp3s and user-contributed levels you
+are planning for version 2.0.
+
+The solution is to use pristine-tar to commit a delta file that efficiently
+stores enough information to reproduce the tarball later.
+
+ cd hello
+ git tag -s 1.0
+ pristine-tar commit ../hello-1.0.tar.gz 1.0
+
+Remember to tell git to push both the pristine-tar branch, and your tag:
+
+ git push --all --tags
+
+Now it is a year later. The worst has come to pass; the "forge" lost
+all its data, you deleted the tarballs to make room for bug report emails,
+and you want to regenerate them. Happily, the git repository is still
+available.
+
+ git clone git://github.com/joeyh/hello.git
+ cd hello
+ pristine-tar checkout ../hello-1.0.tar.gz
+
+=head1 LIMITATIONS
+
+Only tarballs, gzipped tarballs, bzip2ed tarballs, and xzed tarballs
+are currently supported.
+
+Currently only the git revision control system is supported by the
+"checkout" and "commit" commands. It's ok if the working copy
+is not clean or has uncommitted changes, or has changes staged in the
+index; none of that will be touched by "checkout" or "commit".
+
+=head1 ENVIRONMENT
+
+=over 4
+
+=item B<TMPDIR>
+
+Specifies a location to place temporary files, other than the default.
+
+=back
+
+=head1 AUTHOR
+
+Joey Hess <joeyh@debian.org>
+
+Licensed under the GPL, version 2 or above.
+
+=cut
+
+use warnings;
+use strict;
+use Pristine::Tar;
+use Pristine::Tar::Delta;
+use Pristine::Tar::Formats;
+use File::Path;
+use File::Basename;
+use Cwd qw{getcwd abs_path};
+
+# Force locale to C since tar may output utf-8 filenames differently
+# depending on the locale.
+$ENV{LANG}='C';
+
+# Don't let environment change tar's behavior.
+delete $ENV{TAR_OPTIONS};
+delete $ENV{TAPE};
+
+# The following two assignments are potentially munged during the
+# build process to hold the values of TAR_PROGRAM and XDELTA_PROGRAM
+# parameters as given to Makefile.PL.
+my $tar_program = "tar";
+my $xdelta_program = "xdelta";
+
+my $message;
+
+dispatch(
+ commands => {
+ usage => [\&usage],
+ gentar => [\&gentar, 2],
+ gendelta => [\&gendelta, 2],
+ commit => [\&commit],
+ ci => [\&commit, 1],
+ checkout => [\&checkout, 1],
+ co => [\&checkout, 1],
+ list => [\&list, 0],
+ },
+ options => {
+ "m|message=s" => \$message,
+ },
+);
+
+sub usage {
+ print STDERR "Usage: pristine-tar [-vdk] gendelta tarball delta\n";
+ print STDERR " pristine-tar [-vdk] gentar delta tarball\n";
+ print STDERR " pristine-tar [-vdk] [-m message] commit tarball [upstream]\n";
+ print STDERR " pristine-tar [-vdk] checkout tarball\n";
+ print STDERR " pristine-tar list\n";
+ exit 1;
+}
+
+my $recreatetarball_tempdir;
+sub recreatetarball {
+ my $manifestfile=shift;
+ my $source=shift;
+ my %options=@_;
+
+ my $tempdir=tempdir();
+
+ my @manifest;
+ open (IN, "<", $manifestfile) || die "$manifestfile: $!";
+ while (<IN>) {
+ chomp;
+ push @manifest, $_;
+ }
+ close IN;
+ link($manifestfile, "$tempdir/manifest") || die "link $tempdir/manifest: $!";
+
+ # The manifest and source should have the same filenames,
+ # but the manifest probably has all the files under a common
+ # subdirectory. Check if it does.
+ my $subdir="";
+ foreach my $file (@manifest) {
+ #debug("file: $file");
+ if ($file=~m!^(/?[^/]+)(/|$)!) {
+ if (length $subdir && $subdir ne $1) {
+ debug("found file not in subdir $subdir: $file");
+ $subdir="";
+ last;
+ }
+ elsif (! length $subdir) {
+ $subdir=$1;
+ debug("set subdir to $subdir");
+ }
+ }
+ else {
+ debug("found file not in subdir: $file");
+ $subdir="";
+ last;
+ }
+ }
+
+ if (length $subdir) {
+ debug("subdir is $subdir");
+ doit("mkdir", "$tempdir/workdir");
+ $subdir="/$subdir";
+ }
+
+ if (! $options{clobber_source}) {
+ doit("cp", "-a", $source, "$tempdir/workdir$subdir");
+ }
+ else {
+ doit("mv", $source, "$tempdir/workdir$subdir");
+ }
+
+ # It's important that this create an identical tarball each time
+ # for a given set of input files. So don't include file metadata
+ # in the tarball, since it can easily vary.
+ my $full_sweep=0;
+ foreach my $file (@manifest) {
+ if (-l "$tempdir/workdir/$file") {
+ # Can't set timestamp of a symlink, so
+ # replace the symlink with an empty file.
+ unlink("$tempdir/workdir/$file") || die "unlink: $!";
+ open(OUT, ">", "$tempdir/workdir/$file") || die "open: $!";
+ close OUT;
+ }
+ elsif (! -e "$tempdir/workdir/$file") {
+ debug("$file is listed in the manifest but may not be present in the source directory");
+ $full_sweep=1;
+
+ if ($options{create_missing}) {
+ # Avoid tar failing on the nonexistent item by
+ # creating a dummy directory.
+ debug("creating missing $file");
+ mkpath "$tempdir/workdir/$file";
+ }
+ }
+
+ if (-d "$tempdir/workdir/$file" && (-u _ || -g _ || -k _)) {
+ # tar behaves weirdly for some special modes
+ # and ignores --mode, so clear them.
+ debug("chmod $file");
+ chmod(0755, "$tempdir/workdir/$file") ||
+ die "chmod: $!";
+ }
+ }
+
+ # Set file times only after modifying of the directory content is
+ # done.
+ foreach my $file (@manifest) {
+ if (-e "$tempdir/workdir/$file") {
+ utime(0, 0, "$tempdir/workdir/$file") || die "utime: $file: $!";
+ }
+ }
+
+ # If some files couldn't be matched up with the manifest,
+ # it's possible they do exist, but just with names that make sense
+ # to tar, but not to this program. Work around this and make sure
+ # such files have their metadata tweaked, by doing a full sweep of
+ # the tree.
+ if ($full_sweep) {
+ debug("doing full tree sweep to catch missing files");
+ use File::Find;
+ find(sub {
+ if (-l $_) {
+ unlink($_) || die "unlink: $!";
+ open(OUT, ">", $_) || die "open: $!";
+ close OUT;
+ }
+ if (-d $_ && (-u _ || -g _ || -k _)) {
+ chmod(0755, $_) ||
+ die "chmod: $!";
+ }
+ }, "$tempdir/workdir");
+ find(sub {
+ utime(0, 0, $_) || die "utime: $_: $!";
+ }, "$tempdir/workdir");
+ }
+
+ delete $ENV{TAR_LONGLINK_100};
+ $recreatetarball_tempdir=$tempdir;
+ return recreatetarball_helper();
+}
+
+sub recreatetarball_helper {
+ my $tempdir=$recreatetarball_tempdir;
+
+ my $ret="$tempdir/recreatetarball";
+
+ doit($tar_program, "cf", $ret, "--owner", 0, "--group", 0,
+ "--numeric-owner", "-C", "$tempdir/workdir",
+ "--no-recursion", "--mode", "0644",
+ "--files-from", "$tempdir/manifest");
+
+ return $ret;
+}
+
+sub recreatetarball_longlink_100 {
+ # For a long time, Debian's tar had a patch that made it output
+ # larger tar files if a filename was exactly 100 bytes. Now that
+ # Debian's tar has been fixed, in order to recreate the tarball
+ # created by that version of tar, we reply on on an environment
+ # variable to turn back on the old behavior.
+ #
+ # This variable is currently only available in Debian's tar,
+ # so users of non-debian tar who want to recreate tarballs from
+ # deltas created using the old version of Debian's tar are SOL.
+
+ $ENV{TAR_LONGLINK_100}=1;
+ my $ret=recreatetarball_helper();
+ delete $ENV{TAR_LONGLINK_100};
+ return $ret;
+}
+
+sub gentar {
+ my $deltafile=shift;
+ my $tarball=shift;
+ my %opts=@_;
+
+ my $delta=Pristine::Tar::Delta::read(Tarball => $deltafile);
+ Pristine::Tar::Delta::assert($delta, type => "tar", maxversion => 2,
+ minversion => 2, fields => [qw{manifest delta}]);
+
+ my $out=(defined $delta->{wrapper}
+ ? tempdir()."/".basename($tarball).".tmp"
+ : $tarball);
+
+ my @try;
+ push @try, sub { recreatetarball($delta->{manifest}, getcwd,
+ clobber_source => 0, %opts) };
+ push @try, \&recreatetarball_longlink_100;
+
+ my $ok;
+ foreach my $variant (@try) {
+ my $recreatetarball=$variant->();
+ my $ret=try_doit($xdelta_program, "patch", $delta->{delta}, $recreatetarball, $out);
+ if ($ret == 0) {
+ $ok=1;
+ last;
+ }
+ }
+ if (! $ok) {
+ error "Failed to reproduce original tarball. Please file a bug report.";
+ }
+
+ if (defined $delta->{wrapper}) {
+ my $delta_wrapper=Pristine::Tar::Delta::read(Tarball => $delta->{wrapper});
+ if (grep { $_ eq $delta_wrapper->{type} } qw{gz bz2 xz}) {
+ doit("pristine-".$delta_wrapper->{type},
+ ($verbose ? "-v" : "--no-verbose"),
+ ($debug ? "-d" : "--no-debug"),
+ ($keep ? "-k" : "--no-keep"),
+ "gen".$delta_wrapper->{type},
+ $delta->{wrapper}, $out);
+ doit("mv", "-f", $out.".".$delta_wrapper->{type}, $tarball);
+ }
+ else {
+ error "unknown wrapper file type: ".
+ $delta_wrapper->{type};
+ }
+ }
+}
+
+sub genmanifest {
+ my $tarball=shift;
+ my $manifest=shift;
+
+ open(IN, "tar tf $tarball |") || die "tar tf: $!";
+ open(OUT, ">", $manifest) || die "$!";
+ while (<IN>) {
+ chomp;
+ # ./ or / in the manifest just confuses tar
+ s/^\.?\/+//;
+ print OUT "$_\n" if length $_;
+ }
+ close IN;
+ close OUT;
+}
+
+sub gendelta {
+ my $tarball=shift;
+ my $deltafile=shift;
+ my %opts=@_;
+
+ my $tempdir=tempdir();
+ my %delta;
+
+ # Check to see if it's compressed, and get uncompressed tarball.
+ my $compression=undef;
+ if (is_gz($tarball)) {
+ $compression='gz';
+ open(IN, "-|", "zcat", $tarball) || die "zcat: $!";
+ open(OUT, ">", "$tempdir/origtarball") || die "$tempdir/origtarball: $!";
+ print OUT $_ while <IN>;
+ close IN || die "zcat: $!";
+ close OUT || die "$tempdir/origtarball: $!";
+ }
+ elsif (is_bz2($tarball)) {
+ $compression='bz2';
+ open(IN, "-|", "bzcat", $tarball) || die "bzcat: $!";
+ open(OUT, ">", "$tempdir/origtarball") || die "$tempdir/origtarball: $!";
+ print OUT $_ while <IN>;
+ close IN || die "bzcat: $!";
+ close OUT || die "$tempdir/origtarball: $!";
+ }
+ elsif (is_xz($tarball)) {
+ $compression='xz';
+ open(IN, "-|", "xzcat", $tarball) || die "xzcat: $!";
+ open(OUT, ">", "$tempdir/origtarball") || die "$tempdir/origtarball: $!";
+ print OUT $_ while <IN>;
+ close IN || die "xzcat: $!";
+ close OUT || die "$tempdir/origtarball: $!";
+ }
+ close IN;
+
+ # Generate a wrapper file to recreate the compressed file.
+ if (defined $compression) {
+ $delta{wrapper}="$tempdir/wrapper";
+ doit("pristine-$compression",
+ ($verbose ? "-v" : "--no-verbose"),
+ ($debug ? "-d" : "--no-debug"),
+ ($keep ? "-k" : "--no-keep"),
+ "gendelta", $tarball, $delta{wrapper});
+ $tarball="$tempdir/origtarball";
+ }
+
+ $delta{manifest}="$tempdir/manifest";
+ genmanifest($tarball, $delta{manifest});
+
+ my $recreatetarball;
+ if (! exists $opts{recreatetarball}) {
+ my $sourcedir="$tempdir/tmp";
+ doit("mkdir", $sourcedir);
+ doit($tar_program, "xf", File::Spec->rel2abs($tarball), "-C", $sourcedir);
+ # if all files were in a subdir, use the subdir as the sourcedir
+ my @out=grep { $_ ne "$sourcedir/.." && $_ ne "$sourcedir/." }
+ (glob("$sourcedir/*"), glob("$sourcedir/.*"));
+ if ($#out == 0 && -d $out[0]) {
+ $sourcedir=$out[0];
+ }
+ $recreatetarball=recreatetarball("$tempdir/manifest", $sourcedir, clobber_source => 1);
+ }
+ else {
+ $recreatetarball=$opts{recreatetarball};
+ }
+
+ $delta{delta}="$tempdir/delta";
+ my $ret=system("$xdelta_program delta -0 --pristine $recreatetarball $tarball $delta{delta}") >> 8;
+ # xdelta exits 1 on success if there were differences
+ if ($ret != 1 && $ret != 0) {
+ error "xdelta failed with return code $ret";
+ }
+
+ if (-s $delta{delta} >= -s $tarball) {
+ print STDERR "error: excessively large binary delta for $tarball\n";
+ if (! defined $compression) {
+ print STDERR "(Probably the tarball is compressed with an unsupported form of compression.)\n";
+ }
+ else {
+ print STDERR "(Please consider filing a bug report.)\n";
+ }
+ exit 1;
+ }
+
+ Pristine::Tar::Delta::write(Tarball => $deltafile, {
+ version => 2,
+ type => 'tar',
+ %delta,
+ });
+}
+
+sub vcstype {
+ if (-e ".git" ||
+ (exists $ENV{GIT_DIR} && length $ENV{GIT_DIR})) {
+ return 'git';
+ }
+ else {
+ error("cannot determine type of vcs used for the current directory");
+ }
+}
+
+sub export {
+ my $upstream=shift;
+
+ my $dest=tempdir();
+ my $id;
+
+ my $vcs=vcstype();
+ if ($vcs eq "git") {
+ if (defined $upstream && $upstream =~ /[A-Za-z0-9]{40}/) {
+ $id=$upstream;
+ }
+ else {
+ if (! defined $upstream) {
+ $upstream='upstream';
+ }
+
+ my @reflines=map { chomp; $_ } `git show-ref \Q$upstream\E`;
+ if (! @reflines) {
+ error "failed to find ref using: git show-ref $upstream";
+ }
+
+ # if one line's ref matches exactly, use it
+ foreach my $line (@reflines) {
+ my ($b)=$line=~/^[A-Za-z0-9]+\s(.*)/;
+ if ($b eq $upstream || $b eq "refs/heads/$upstream") {
+ ($id)=$line=~/^([A-Za-z0-9]+)\s/;
+ last;
+ }
+ }
+
+ if (! defined $id) {
+ if (@reflines == 1) {
+ ($id)=$reflines[0]=~/^([A-Za-z0-9]+)\s/;
+ }
+ else {
+ error "more than one ref matches \"$upstream\":\n".
+ join("\n", @reflines);
+ }
+ }
+ }
+
+ # We have an id that is probably a commit. Let's get to the
+ # id of the actual tree instead. This makes us more robust
+ # against any later changes to the commit.
+ my $treeid=`git rev-parse '$id^{tree}'`;
+ chomp $treeid;
+ $id = $treeid if length $treeid;
+
+ doit("git archive --format=tar \Q$id\E | (cd '$dest' && tar x)");
+ }
+ else {
+ die "unsupported vcs $vcs";
+ }
+
+ return ($dest, $id);
+}
+
+sub git_findbranch {
+ # Looks for a branch with the given name. If a local branch exists,
+ # returns it. Otherwise, looks for a remote branch, and if exactly
+ # one exists, returns that. If there's no such branch at all, returns
+ # undef. Finally, if there are multiple remote branches and no
+ # local branch, fails with an error.
+ my $branch=shift;
+
+ my @reflines=split(/\n/, `git show-ref \Q$branch\E`);
+ my @remotes=grep { ! m/ refs\/heads\/\Q$branch\E$/ } @reflines;
+ if ($#reflines != $#remotes) {
+ return $branch;
+ }
+ else {
+ if (@reflines == 0) {
+ return undef;
+ }
+ elsif (@remotes == 1) {
+ my ($remote_branch)=$remotes[0]=~/^[A-Za-z0-9]+\s(.*)/;
+ return $remote_branch;
+ }
+ else {
+ error "There's no local $branch branch. Several remote $branch branches exist.\n".
+ "Run \"git branch --track $branch <remote>\" to create a local $branch branch\n".
+ join("\n", @remotes);
+ }
+ }
+}
+
+sub checkoutdelta {
+ my $tarball=shift;
+
+ my $branch="pristine-tar";
+ my $deltafile=basename($tarball).".delta";
+ my $idfile=basename($tarball).".id";
+
+ my ($delta, $id);
+
+ my $vcs=vcstype();
+ if ($vcs eq "git") {
+ my $b=git_findbranch($branch);
+ if (! defined $b) {
+ error "no $branch branch found, use \"pristine-tar commit\" first";
+ }
+ elsif ($b eq $branch) {
+ $branch="refs/heads/$branch";
+ }
+ else {
+ # use remote branch
+ $branch=$b;
+ }
+
+ $delta=`git show $branch:\Q$deltafile\E`;
+ if ($?) {
+ error "git show $branch:$deltafile failed";
+ }
+ if (! length $delta) {
+ error "git show $branch:$deltafile returned no content";
+ }
+ $id=`git show $branch:\Q$idfile\E`;
+ if ($?) {
+ error "git show $branch:$idfile failed";
+ }
+ chomp $id;
+ if (! length $id) {
+ error "git show $branch:$idfile returned no id";
+ }
+ }
+ else {
+ die "unsupported vcs $vcs";
+ }
+
+ return ($delta, $id);
+}
+
+sub commitdelta {
+ my $delta=shift;
+ my $id=shift;
+ my $tarball=shift;
+
+ my $branch="pristine-tar";
+ my $deltafile=basename($tarball).".delta";
+ my $idfile=basename($tarball).".id";
+ my $commit_message=defined $message ? $message :
+ "pristine-tar data for ".basename($tarball);
+
+ my $vcs=vcstype();
+ if ($vcs eq "git") {
+ my $tempdir=tempdir();
+ open(OUT, ">$tempdir/$deltafile") || die "$tempdir/$deltafile: $!";
+ print OUT $delta;
+ close OUT;
+ open(OUT, ">$tempdir/$idfile") || die "$tempdir/$idfile: $!";
+ print OUT "$id\n";
+ close OUT;
+
+ # Commit the delta to a branch in git without affecting the
+ # index, and without touching the working tree. Aka deep
+ # git magick.
+ $ENV{GIT_INDEX_FILE}="$tempdir/index";
+ if (! exists $ENV{GIT_DIR} || ! length $ENV{GIT_DIR}) {
+ $ENV{GIT_DIR}=getcwd."/.git";
+ }
+ else {
+ $ENV{GIT_DIR}=abs_path($ENV{GIT_DIR});
+ }
+ chdir($tempdir) || die "chdir: $!";
+
+ # If there's no local branch, branch from a remote branch
+ # if one exists. If there's no remote branch either, the
+ # code below will create the local branch.
+ my $b=git_findbranch($branch);
+ if (defined $b && $b ne $branch) {
+ doit("git branch --track \Q$branch\E \Q$b\E");
+ }
+
+ my $branch_exists=(system("git show-ref --quiet --verify refs/heads/$branch") == 0);
+ if ($branch_exists) {
+ doit("git ls-tree -r --full-name $branch | git update-index --index-info");
+ }
+ doit("git", "update-index", "--add", $deltafile, $idfile);
+ my $sha=`git write-tree`;
+ if ($?) {
+ error("git write-tree failed");
+ }
+ $sha=~s/\n//sg;
+ if (! length $sha) {
+ error("git write-tree did not return a sha");
+ }
+ my $pid = open(COMMIT, "|-");
+ if (! $pid) {
+ # child
+ my $commitopts=$branch_exists ? "-p $branch" : "";
+ my $commitsha=`git commit-tree $sha $commitopts`;
+ if ($?) {
+ error("git commit-tree failed");
+ }
+ $commitsha=~s/\n//sg;
+ if (! length $commitsha) {
+ error("git commit-tree did not return a sha");
+ }
+ doit("git", "update-ref", "refs/heads/$branch", $commitsha);
+ exit 0;
+ }
+ else {
+ # parent
+ print COMMIT $commit_message."\n";
+ close COMMIT || error("git commit-tree failed");
+ }
+
+ message("committed $deltafile to branch $branch");
+ }
+ else {
+ die "unsupported vcs $vcs";
+ }
+}
+
+sub commit {
+ my $tarball=shift;
+ my $upstream=shift; # optional
+
+ if (! defined $tarball || @_) {
+ usage();
+ }
+
+ my $tempdir=tempdir();
+ my ($sourcedir, $id)=export($upstream);
+ genmanifest($tarball, "$tempdir/manifest");
+ my $recreatetarball=recreatetarball("$tempdir/manifest", $sourcedir,
+ clobber_source => 1, create_missing => 1);
+ my $pid = open(GENDELTA, "-|");
+ if (! $pid) {
+ # child
+ gendelta($tarball, "-", recreatetarball => $recreatetarball);
+ exit 0;
+ }
+ local $/=undef;
+ my $delta=<GENDELTA>;
+ close GENDELTA || error "failed to generate delta";
+ commitdelta($delta, $id, $tarball);
+}
+
+sub checkout {
+ my $tarball=shift;
+
+ my ($delta, $id)=checkoutdelta($tarball);
+ my ($sourcedir, undef)=export($id);
+ my $pid = open(GENTAR, "|-");
+ if (! $pid) {
+ # child
+ $tarball=abs_path($tarball);
+ chdir($sourcedir) || die "chdir $sourcedir: $!";
+ gentar("-", $tarball, clobber_source => 1, create_missing => 1);
+ exit 0;
+ }
+ print GENTAR $delta;
+ close GENTAR || error "failed to generate tarball";
+
+ message("successfully generated $tarball");
+}
+
+sub list {
+ my $branch="pristine-tar";
+ my $vcs=vcstype();
+ if ($vcs eq "git") {
+ my $b=git_findbranch($branch);
+ if (defined $b) {
+ open (LIST, "git ls-tree $b --name-only |");
+ while (<LIST>) {
+ chomp;
+ next unless s/\.delta$//;
+ print $_."\n";
+ }
+ }
+ }
+ else {
+ die "unsupported vcs $vcs";
+ }
+}
--- /dev/null
+.\" Automatically generated by Pod::Man 2.25 (Pod::Simple 3.16)
+.\"
+.\" Standard preamble:
+.\" ========================================================================
+.de Sp \" Vertical space (when we can't use .PP)
+.if t .sp .5v
+.if n .sp
+..
+.de Vb \" Begin verbatim text
+.ft CW
+.nf
+.ne \\$1
+..
+.de Ve \" End verbatim text
+.ft R
+.fi
+..
+.\" Set up some character translations and predefined strings. \*(-- will
+.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left
+.\" double quote, and \*(R" will give a right double quote. \*(C+ will
+.\" give a nicer C++. Capital omega is used to do unbreakable dashes and
+.\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff,
+.\" nothing in troff, for use with C<>.
+.tr \(*W-
+.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
+.ie n \{\
+. ds -- \(*W-
+. ds PI pi
+. if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch
+. if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch
+. ds L" ""
+. ds R" ""
+. ds C` ""
+. ds C' ""
+'br\}
+.el\{\
+. ds -- \|\(em\|
+. ds PI \(*p
+. ds L" ``
+. ds R" ''
+'br\}
+.\"
+.\" Escape single quotes in literal strings from groff's Unicode transform.
+.ie \n(.g .ds Aq \(aq
+.el .ds Aq '
+.\"
+.\" If the F register is turned on, we'll generate index entries on stderr for
+.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
+.\" entries marked with X<> in POD. Of course, you'll have to process the
+.\" output yourself in some meaningful fashion.
+.ie \nF \{\
+. de IX
+. tm Index:\\$1\t\\n%\t"\\$2"
+..
+. nr % 0
+. rr F
+.\}
+.el \{\
+. de IX
+..
+.\}
+.\"
+.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
+.\" Fear. Run. Save yourself. No user-serviceable parts.
+. \" fudge factors for nroff and troff
+.if n \{\
+. ds #H 0
+. ds #V .8m
+. ds #F .3m
+. ds #[ \f1
+. ds #] \fP
+.\}
+.if t \{\
+. ds #H ((1u-(\\\\n(.fu%2u))*.13m)
+. ds #V .6m
+. ds #F 0
+. ds #[ \&
+. ds #] \&
+.\}
+. \" simple accents for nroff and troff
+.if n \{\
+. ds ' \&
+. ds ` \&
+. ds ^ \&
+. ds , \&
+. ds ~ ~
+. ds /
+.\}
+.if t \{\
+. ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u"
+. ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u'
+. ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u'
+. ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u'
+. ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u'
+. ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u'
+.\}
+. \" troff and (daisy-wheel) nroff accents
+.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V'
+.ds 8 \h'\*(#H'\(*b\h'-\*(#H'
+.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#]
+.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H'
+.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u'
+.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
+.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
+.ds ae a\h'-(\w'a'u*4/10)'e
+.ds Ae A\h'-(\w'A'u*4/10)'E
+. \" corrections for vroff
+.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
+.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
+. \" for low resolution devices (crt and lpr)
+.if \n(.H>23 .if \n(.V>19 \
+\{\
+. ds : e
+. ds 8 ss
+. ds o a
+. ds d- d\h'-1'\(ga
+. ds D- D\h'-1'\(hy
+. ds th \o'bp'
+. ds Th \o'LP'
+. ds ae ae
+. ds Ae AE
+.\}
+.rm #[ #] #H #V #F C
+.\" ========================================================================
+.\"
+.IX Title "PRISTINE-TAR 1"
+.TH PRISTINE-TAR 1 "2013-02-13" "perl v5.14.2" "pristine-tar"
+.\" For nroff, turn off justification. Always turn off hyphenation; it makes
+.\" way too many mistakes in technical documents.
+.if n .ad l
+.nh
+.SH "NAME"
+pristine\-tar \- regenerate pristine tarballs
+.SH "SYNOPSIS"
+.IX Header "SYNOPSIS"
+\&\fBpristine-tar\fR [\-vdk] gendelta \fItarball\fR \fIdelta\fR
+.PP
+\&\fBpristine-tar\fR [\-vdk] gentar \fIdelta\fR \fItarball\fR
+.PP
+\&\fBpristine-tar\fR [\-vdk] [\-m message] commit \fItarball\fR [\fIupstream\fR]
+.PP
+\&\fBpristine-tar\fR [\-vdk] checkout \fItarball\fR
+.PP
+\&\fBpristine-tar\fR [\-vdk] list
+.SH "DESCRIPTION"
+.IX Header "DESCRIPTION"
+pristine-tar can regenerate an exact copy of a pristine upstream tarball
+using only a small binary \fIdelta\fR file and the contents of the tarball,
+which are typically kept in an \fIupstream\fR branch in version control.
+.PP
+The \fIdelta\fR file is designed to be checked into version control along-side
+the \fIupstream\fR branch, thus allowing Debian packages to be built entirely
+using sources in version control, without the need to keep copies of
+upstream tarballs.
+.PP
+pristine-tar supports compressed tarballs, calling out to \fIpristine\-gz\fR\|(1),
+\&\fIpristine\-bz2\fR\|(1), and \fIpristine\-xz\fR\|(1) to produce the pristine gzip, bzip2,
+and xz files.
+.SH "COMMANDS"
+.IX Header "COMMANDS"
+.IP "pristine-tar gendelta \fItarball\fR \fIdelta\fR" 4
+.IX Item "pristine-tar gendelta tarball delta"
+This takes the specified upstream \fItarball\fR, and generates a small binary
+delta file that can later be used by pristine-tar gentar to recreate the
+tarball.
+.Sp
+If the delta filename is \*(L"\-\*(R", it is written to standard output.
+.IP "pristine-tar gentar \fIdelta\fR \fItarball\fR" 4
+.IX Item "pristine-tar gentar delta tarball"
+This takes the specified \fIdelta\fR file, and the files in the current
+directory, which must have identical content to those in the upstream
+tarball, and uses these to regenerate the pristine upstream \fItarball\fR.
+.Sp
+If the delta filename is \*(L"\-\*(R", it is read from standard input.
+.IP "pristine-tar commit \fItarball\fR [\fIupstream\fR]" 4
+.IX Item "pristine-tar commit tarball [upstream]"
+\&\fBpristine-tar commit\fR generates a pristine-tar delta file for the specified
+\&\fItarball\fR, and commits it to version control. The \fBpristine-tar checkout\fR
+command can later be used to recreate the original tarball based only
+on the information stored in version control.
+.Sp
+The \fIupstream\fR parameter specifies the tag or branch that contains the
+same content that is present in the tarball. This defaults to
+\&\*(L"refs/heads/upstream\*(R", or if there's no such branch, any
+branch matching \*(L"upstream\*(R". The name of the tree it points to will be
+recorded for later use by \fBpristine-tar checkout\fR. Note that the content
+does not need to be 100% identical to the content of the tarball, but
+if it is not, additional space will be used in the delta file.
+.Sp
+The delta files are stored in a branch named \*(L"pristine-tar\*(R", with filenames
+corresponding to the input tarball, with \*(L".delta\*(R" appended. This
+branch is created or updated as needed to add each new delta.
+.IP "pristine-tar checkout \fItarball\fR" 4
+.IX Item "pristine-tar checkout tarball"
+This regenerates a copy of the specified \fItarball\fR using information
+previously saved in version control by \fBpristine-tar commit\fR.
+.IP "pristine-tar list" 4
+.IX Item "pristine-tar list"
+This lists tarballs that pristine-tar is able to checkout from version
+control.
+.SH "OPTIONS"
+.IX Header "OPTIONS"
+.IP "\-v" 4
+.IX Item "-v"
+.PD 0
+.IP "\-\-verbose" 4
+.IX Item "--verbose"
+.PD
+Verbose mode, show each command that is run.
+.IP "\-d" 4
+.IX Item "-d"
+.PD 0
+.IP "\-\-debug" 4
+.IX Item "--debug"
+.PD
+Debug mode.
+.IP "\-k" 4
+.IX Item "-k"
+.PD 0
+.IP "\-\-keep" 4
+.IX Item "--keep"
+.PD
+Don't clean up the temporary directory on exit.
+.IP "\-m message" 4
+.IX Item "-m message"
+.PD 0
+.IP "\-\-message=message" 4
+.IX Item "--message=message"
+.PD
+Use this option to specify a custom commit message to pristine-tar commit.
+.SH "EXAMPLES"
+.IX Header "EXAMPLES"
+Suppose you maintain the hello package, in a git repository. You have
+just created a tarball of the release, \fIhello\-1.0.tar.gz\fR, which you
+will upload to a \*(L"forge\*(R" site.
+.PP
+You want to ensure that, if the \*(L"forge\*(R" loses the tarball, you can always
+recreate exactly that same tarball. And you'd prefer not to keep copies
+of tarballs for every release, as that could use a lot of disk space
+when hello gets the background mp3s and user-contributed levels you
+are planning for version 2.0.
+.PP
+The solution is to use pristine-tar to commit a delta file that efficiently
+stores enough information to reproduce the tarball later.
+.PP
+.Vb 3
+\& cd hello
+\& git tag \-s 1.0
+\& pristine\-tar commit ../hello\-1.0.tar.gz 1.0
+.Ve
+.PP
+Remember to tell git to push both the pristine-tar branch, and your tag:
+.PP
+.Vb 1
+\& git push \-\-all \-\-tags
+.Ve
+.PP
+Now it is a year later. The worst has come to pass; the \*(L"forge\*(R" lost
+all its data, you deleted the tarballs to make room for bug report emails,
+and you want to regenerate them. Happily, the git repository is still
+available.
+.PP
+.Vb 3
+\& git clone git://github.com/joeyh/hello.git
+\& cd hello
+\& pristine\-tar checkout ../hello\-1.0.tar.gz
+.Ve
+.SH "LIMITATIONS"
+.IX Header "LIMITATIONS"
+Only tarballs, gzipped tarballs, bzip2ed tarballs, and xzed tarballs
+are currently supported.
+.PP
+Currently only the git revision control system is supported by the
+\&\*(L"checkout\*(R" and \*(L"commit\*(R" commands. It's ok if the working copy
+is not clean or has uncommitted changes, or has changes staged in the
+index; none of that will be touched by \*(L"checkout\*(R" or \*(L"commit\*(R".
+.SH "ENVIRONMENT"
+.IX Header "ENVIRONMENT"
+.IP "\fB\s-1TMPDIR\s0\fR" 4
+.IX Item "TMPDIR"
+Specifies a location to place temporary files, other than the default.
+.SH "AUTHOR"
+.IX Header "AUTHOR"
+Joey Hess <joeyh@debian.org>
+.PP
+Licensed under the \s-1GPL\s0, version 2 or above.
--- /dev/null
+Name: pristine-tar
+Version: 1.27
+Release: 2%{?dist}
+Summary: regenerate pristine tarballs
+
+Group: System Tools
+License: GPLv2
+Url: http://kitenet.net/~joey/code/pristine-tar/
+Source0: http://ftp.debian.org/debian/pool/main/p/pristine-tar/%{name}_%{version}.tar.gz
+BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
+
+Requires: git, xdelta
+
+%description
+pristine-tar can regenerate a pristine upstream tarball using only a
+small binary delta file and a copy of the source which can be a revision
+control checkout.
+
+The package also includes a pristine-gz command, which can regenerate
+a pristine .gz file.
+
+The delta file is designed to be checked into revision control along-side
+the source code, thus allowing the original tarball to be extracted from
+revision control.
+
+pristine-tar is available in git at git://git.kitenet.net/pristine-tar/
+
+
+%prep
+%setup -q -n %{name}
+
+
+%build
+perl Makefile.PL INSTALLDIRS=vendor PREFIX=%{_prefix}
+make %{?_smp_mflags}
+
+
+%install
+rm -rf $RPM_BUILD_ROOT
+make install DESTDIR=$RPM_BUILD_ROOT
+
+
+%clean
+rm -rf $RPM_BUILD_ROOT
+
+
+%files
+%defattr(-,root,root,-)
+%doc GPL TODO delta-format.txt
+%{_bindir}/*
+%{_mandir}/*
+
+
+%changelog
+* Tue Feb 24 2009 Jimmy Tang <jtang@tchpc.tcd.ie> - 0.21-1
+- initial package
+
--- /dev/null
+#!/usr/bin/perl
+
+=head1 NAME
+
+pristine-xz - regenerate pristine xz files
+
+=head1 SYNOPSIS
+
+B<pristine-xz> [-vdk] gendelta I<file.xz> I<delta>
+
+B<pristine-xz> [-vdk] genxz I<delta> I<file>
+
+=head1 DESCRIPTION
+
+This is a complement to the pristine-tar(1) command. Normally you
+don't need to run it by hand, since pristine-tar calls it as necessary
+to handle .tar.xz files.
+
+pristine-xz gendelta takes the specified I<xz> file, and generates a
+small binary I<delta> file that can later be used by pristine-xz genxz
+to recreate the original file.
+
+pristine-xz genxz takes the specified I<delta> file, and compresses the
+specified input I<file> (which must be identical to the contents of the
+original xz file). The resulting file will be identical to
+the original gz file used to create the delta.
+
+The approach used to regenerate the original xz file is to figure out
+how it was produced -- what compression level was used, etc. Currently
+support is poor for xz files produced with unusual compression options.
+
+If the delta filename is "-", pristine-xz reads or writes it to stdio.
+
+=head1 OPTIONS
+
+=over 4
+
+=item -v
+
+Verbose mode, show each command that is run.
+
+=item -d
+
+Debug mode.
+
+=item -k
+
+Don't clean up the temporary directory on exit.
+
+=item -t
+
+Try harder to determine how to generate deltas of difficult xz files.
+
+=back
+
+=head1 ENVIRONMENT
+
+=over 4
+
+=item B<TMPDIR>
+
+Specifies a location to place temporary files, other than the default.
+
+=back
+
+=head1 AUTHOR
+
+Joey Hess <joeyh@debian.org>,
+Faidon Liambotis <paravoid@debian.org>,
+Cyril Brulebois <cyril.brulebois@enst-bretagne.fr>
+
+Licensed under the GPL, version 2.
+
+=cut
+
+use warnings;
+use strict;
+use Pristine::Tar;
+use Pristine::Tar::Delta;
+use Pristine::Tar::Formats;
+use File::Basename qw/basename/;
+use IO::Handle;
+
+my @supported_xz_programs = qw(xz);
+
+my $try=0;
+
+dispatch(
+ commands => {
+ usage => [\&usage],
+ genxz => [\&genxz, 2],
+ gendelta => [\&gendelta, 2],
+ },
+ options => {
+ "t|try!" => \$try,
+ },
+);
+
+sub usage {
+ print STDERR "Usage: pristine-xz [-vdkt] gendelta file.xz delta\n";
+ print STDERR " pristine-xz [-vdkt] genxz delta file\n";
+}
+
+sub assign_fields {
+ my ($hash, $labels, $fields) = @_;
+ @$hash{@$labels} = @$fields[1..scalar(@$labels)];
+}
+
+sub scan_xz_lvv_robot {
+ my ($filename) = @_;
+ # We need at least version 5.0 to get a proper '-lvv --robot'
+ # implemented
+ my $cmd = "xz -lvv --robot $filename";
+ my $ret = open (my $in, "$cmd |") || die "$cmd failed: $!";
+ my %xz = (file => {}, stream => {}, blocks => [],
+ summary => {}, totals => {});
+ my (%file, %stream, @blocks, %summary, %totals);
+ my @file_labels = qw{nb_streams nb_blocks compressed uncompressed
+ ratio checks padding_size};
+ my @stream_labels =
+ qw{stream_num nb_blocks compressed_offset uncompressed_offset
+ compressed_size uncompressed_size ratio check_name
+ padding_size};
+ my @block_labels =
+ qw{stream_num block_in_stream block_in_file compressed_offset
+ uncompressed_offset compressed_size uncompressed_size ratio
+ check_name check_value header_size size_present_flags
+ actual_compressed_size uncompress_memory filter_chain};
+ my @summary_labels = qw{uncompressed_memory size_in_blocks};
+ my @totals_labels =
+ qw{nb_streams nb_blocks compressed_size uncompressed_size ratio
+ check_names padding_size nb_files uncompressed_memory
+ size_in_blocks};
+
+ while (my $line = <$in>) {
+ chomp $line;
+ my @fields = split(/\t/, $line);
+ if ($fields[0] eq 'name') {
+ next;
+ }
+ if ($fields[0] eq 'file') {
+ assign_fields($xz{file}, \@file_labels, \@fields);
+ next;
+ }
+ if ($fields[0] eq 'stream') {
+ assign_fields($xz{stream}, \@stream_labels, \@fields);
+ next;
+ }
+ if ($fields[0] eq 'block') {
+ my %block;
+ assign_fields(\%block, \@block_labels, \@fields);
+ push @{$xz{blocks}}, \%block;
+ next;
+ }
+ if ($fields[0] eq 'summary') {
+ assign_fields($xz{summary}, \@summary_labels, \@fields);
+ next;
+ }
+ if ($fields[0] eq 'totals') {
+ assign_fields($xz{totals}, \@totals_labels, \@fields);
+ next;
+ }
+ }
+ close $in;
+ return \%xz;
+}
+
+sub predict_xz_args {
+ my ($xz) = @_;
+ my $presets = undef;
+ my $block_list = undef;
+ my $blocks = $xz->{blocks};
+ if (scalar(@$blocks)) {
+ # There is at least one block. We assume the same compression
+ # level for all blocks
+ my $block = $blocks->[0];
+ my @filters = split(/,/, $block->{filter_chain});
+ if (scalar(@filters) != 1 || $filters[0] !~ /^--lzma2=/) {
+ die "Only LZMA2 is supported";
+ }
+ # Deduce the presets from the dict size
+ if ($filters[0] =~ /--lzma2=dict=(.*)/) {
+ my $dict_size = $1;
+ my %lzma2_presets_from_dict_size_of =
+ ('256KiB' => ['0'],
+ '1Mib' => ['1'],
+ '2MiB' => ['2'],
+ '4MiB' => ['4', '3'],
+ # Put 6 before 5 as it's the default and is
+ # more likely to be right
+ '8MiB' => ['6', '5'],
+ '16MiB' => ['7'],
+ '32MiB' => ['8'],
+ '64MiB' => ['9'],
+ );
+ $presets = $lzma2_presets_from_dict_size_of{$dict_size};
+ die "Unkown dict size: $dict_size\n"
+ if (!defined($presets));
+ }
+ if (scalar(@$blocks) > 1) {
+ # Gather the block uncompressed sizes
+ $block_list = join(',', map {$_->{uncompressed_size}}
+ @$blocks);
+ }
+ }
+ my %check_kwd_of =
+ (None => 'none',
+ CRC32 => 'crc32',
+ CRC64 => 'crc64',
+ 'SHA-256' => 'sha256',
+ );
+ my $check_name = $xz->{stream}->{check_name};
+ my $check_kwd = $check_kwd_of{$check_name};
+ die "Unknown xz check: $check_name\n" if (!defined($check_kwd));
+
+ my $possible_args = [];
+ my $common = ["--check=$check_kwd", "-z"];
+ if (defined($block_list)) {
+ unshift @$common, "--block-list=$block_list";
+ }
+ foreach my $preset (@$presets) {
+ push @$possible_args, [@$common, "-$preset"];
+ push @$possible_args, [@$common, "-${preset}e"];
+ }
+ return $possible_args;
+}
+
+sub readxz {
+ my $filename = shift;
+
+ if (! is_xz($filename)) {
+ error "This is not a valid xz archive.";
+ }
+
+ # This will guess the compression level, check and blocks from the file.
+ # More info is still needed if the level used was 3/4 or 5/6 (see
+ # lzma2_presets_from_dict_size_of in predict_xz_args) or if --extreme
+ # was used. We output possible args for each combination in this case.
+ my $xz = scan_xz_lvv_robot($filename);
+ my $possible_args = predict_xz_args($xz);
+ return $possible_args;
+}
+
+sub predictxzlevels {
+ my $filename = shift;
+
+ if (! is_xz($filename)) {
+ error "This is not a valid xz archive.";
+ }
+
+ # XXX We don't currently have a way to guess the level from the
+ # file format, as this level only presets several other tunables.
+ # Correct handling would involve finding as many preset values as
+ # possible, and reconstructing the compression level from that.
+ #
+ # So far in the wild only these levels have been seen.
+ # (Note that level 9 can use a lot of memory.)
+ my $possible_levels = ["6", "9", "0", "6e", "9e", "0e"];
+
+ return ($possible_levels);
+}
+
+sub predictxzargs {
+ my ($possible_levels, $program) = @_;
+
+ my @args;
+ foreach my $level (@$possible_levels) {
+ push @args, ["-z", "-$level"];
+ push @args, ["-z", "-$level", "--check=crc32"];
+ push @args, ["-z", "-$level", "--check=sha256"];
+ }
+ return @args;
+}
+
+sub testvariant {
+ my ($old, $tmpin, $xz_program, @args) = @_;
+
+ my $new=$tmpin.'.xz';
+ unlink($new);
+
+ # Note that file name, mode, mtime do not matter to xz.
+
+ # try xz'ing with the arguments passed
+ doit_redir($tmpin, $new, $xz_program, @args);
+
+ unless (-e $new) {
+ die("$xz_program failed, aborting");
+ }
+
+ # and compare the generated with the original
+ return !comparefiles($old, $new);
+}
+
+sub reproducexz {
+ my $orig=shift;
+
+ my $wd=tempdir();
+
+ my $tmpin="$wd/test";
+ doit_redir($orig, $tmpin, "xz", "-dc");
+
+ # read fields from xz headers
+ my $possible_args;
+ eval {
+ $possible_args = readxz($orig);
+ };
+ # If we get an error we fallback to guessing, otherwise, we should
+ # succeed with one of the proposed combinations
+ if (! $@) {
+ foreach my $program (@supported_xz_programs) {
+ foreach my $args (@$possible_args) {
+ testvariant($orig, $tmpin, $program, @$args)
+ && return $program, @$args;
+ }
+ }
+ }
+ else {
+ # Fallback to guessing
+ my ($possible_levels) = predictxzlevels($orig);
+
+ foreach my $program (@supported_xz_programs) {
+ # try to guess the xz arguments that are needed
+ foreach my $args (predictxzargs($possible_levels,
+ $program)) {
+ testvariant($orig, $tmpin, $program, @$args)
+ && return $program, @$args;
+ }
+ }
+ }
+
+ print STDERR "pristine-xz failed to reproduce build of $orig\n";
+ print STDERR "(Please file a bug report.)\n";
+ exit 1;
+}
+
+sub genxz {
+ my $deltafile=shift;
+ my $file=shift;
+
+ my $delta=Pristine::Tar::Delta::read(Tarball => $deltafile);
+ Pristine::Tar::Delta::assert($delta, type => "xz", maxversion => 2,
+ fields => [qw{params program}]);
+
+ my @params=split(' ', $delta->{params});
+ while (@params) {
+ my $param=shift @params;
+
+ next if $param=~/^(-[0-9]e?)$/;
+ next if $param eq '-z';
+ next if $param eq '--check=none';
+ next if $param eq '--check=crc32';
+ next if $param eq '--check=crc64';
+ next if $param eq '--check=sha256';
+ next if $param=~/^(--block-list=[0-9,]+)$/;
+ die "paranoia check failed on params from delta (@params)";
+ }
+ @params=split(' ', $delta->{params});
+
+ my $program=$delta->{program};
+ if (! grep { $program eq $_ } @supported_xz_programs) {
+ die "paranoia check failed on program from delta ($program)";
+ }
+
+ doit($program, @params, $file);
+}
+
+sub gendelta {
+ my $xzfile=shift;
+ my $deltafile=shift;
+
+ my ($program, @params) = reproducexz($xzfile);
+
+ Pristine::Tar::Delta::write(Tarball => $deltafile, {
+ version => '2.0',
+ type => 'xz',
+ params => "@params",
+ program => $program,
+ });
+}
--- /dev/null
+.\" Automatically generated by Pod::Man 2.25 (Pod::Simple 3.16)
+.\"
+.\" Standard preamble:
+.\" ========================================================================
+.de Sp \" Vertical space (when we can't use .PP)
+.if t .sp .5v
+.if n .sp
+..
+.de Vb \" Begin verbatim text
+.ft CW
+.nf
+.ne \\$1
+..
+.de Ve \" End verbatim text
+.ft R
+.fi
+..
+.\" Set up some character translations and predefined strings. \*(-- will
+.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left
+.\" double quote, and \*(R" will give a right double quote. \*(C+ will
+.\" give a nicer C++. Capital omega is used to do unbreakable dashes and
+.\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff,
+.\" nothing in troff, for use with C<>.
+.tr \(*W-
+.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
+.ie n \{\
+. ds -- \(*W-
+. ds PI pi
+. if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch
+. if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch
+. ds L" ""
+. ds R" ""
+. ds C` ""
+. ds C' ""
+'br\}
+.el\{\
+. ds -- \|\(em\|
+. ds PI \(*p
+. ds L" ``
+. ds R" ''
+'br\}
+.\"
+.\" Escape single quotes in literal strings from groff's Unicode transform.
+.ie \n(.g .ds Aq \(aq
+.el .ds Aq '
+.\"
+.\" If the F register is turned on, we'll generate index entries on stderr for
+.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
+.\" entries marked with X<> in POD. Of course, you'll have to process the
+.\" output yourself in some meaningful fashion.
+.ie \nF \{\
+. de IX
+. tm Index:\\$1\t\\n%\t"\\$2"
+..
+. nr % 0
+. rr F
+.\}
+.el \{\
+. de IX
+..
+.\}
+.\"
+.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
+.\" Fear. Run. Save yourself. No user-serviceable parts.
+. \" fudge factors for nroff and troff
+.if n \{\
+. ds #H 0
+. ds #V .8m
+. ds #F .3m
+. ds #[ \f1
+. ds #] \fP
+.\}
+.if t \{\
+. ds #H ((1u-(\\\\n(.fu%2u))*.13m)
+. ds #V .6m
+. ds #F 0
+. ds #[ \&
+. ds #] \&
+.\}
+. \" simple accents for nroff and troff
+.if n \{\
+. ds ' \&
+. ds ` \&
+. ds ^ \&
+. ds , \&
+. ds ~ ~
+. ds /
+.\}
+.if t \{\
+. ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u"
+. ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u'
+. ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u'
+. ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u'
+. ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u'
+. ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u'
+.\}
+. \" troff and (daisy-wheel) nroff accents
+.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V'
+.ds 8 \h'\*(#H'\(*b\h'-\*(#H'
+.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#]
+.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H'
+.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u'
+.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
+.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
+.ds ae a\h'-(\w'a'u*4/10)'e
+.ds Ae A\h'-(\w'A'u*4/10)'E
+. \" corrections for vroff
+.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
+.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
+. \" for low resolution devices (crt and lpr)
+.if \n(.H>23 .if \n(.V>19 \
+\{\
+. ds : e
+. ds 8 ss
+. ds o a
+. ds d- d\h'-1'\(ga
+. ds D- D\h'-1'\(hy
+. ds th \o'bp'
+. ds Th \o'LP'
+. ds ae ae
+. ds Ae AE
+.\}
+.rm #[ #] #H #V #F C
+.\" ========================================================================
+.\"
+.IX Title "PRISTINE-XZ 1"
+.TH PRISTINE-XZ 1 "2012-07-16" "perl v5.14.2" "pristine-xz"
+.\" For nroff, turn off justification. Always turn off hyphenation; it makes
+.\" way too many mistakes in technical documents.
+.if n .ad l
+.nh
+.SH "NAME"
+pristine\-xz \- regenerate pristine xz files
+.SH "SYNOPSIS"
+.IX Header "SYNOPSIS"
+\&\fBpristine-xz\fR [\-vdk] gendelta \fIfile.xz\fR \fIdelta\fR
+.PP
+\&\fBpristine-xz\fR [\-vdk] genxz \fIdelta\fR \fIfile\fR
+.SH "DESCRIPTION"
+.IX Header "DESCRIPTION"
+This is a complement to the \fIpristine\-tar\fR\|(1) command. Normally you
+don't need to run it by hand, since pristine-tar calls it as necessary
+to handle .tar.xz files.
+.PP
+pristine-xz gendelta takes the specified \fIxz\fR file, and generates a
+small binary \fIdelta\fR file that can later be used by pristine-xz genxz
+to recreate the original file.
+.PP
+pristine-xz genxz takes the specified \fIdelta\fR file, and compresses the
+specified input \fIfile\fR (which must be identical to the contents of the
+original xz file). The resulting file will be identical to
+the original gz file used to create the delta.
+.PP
+The approach used to regenerate the original xz file is to figure out
+how it was produced \*(-- what compression level was used, etc. Currently
+support is poor for xz files produced with unusual compression options.
+.PP
+If the delta filename is \*(L"\-\*(R", pristine-xz reads or writes it to stdio.
+.SH "OPTIONS"
+.IX Header "OPTIONS"
+.IP "\-v" 4
+.IX Item "-v"
+Verbose mode, show each command that is run.
+.IP "\-d" 4
+.IX Item "-d"
+Debug mode.
+.IP "\-k" 4
+.IX Item "-k"
+Don't clean up the temporary directory on exit.
+.IP "\-t" 4
+.IX Item "-t"
+Try harder to determine how to generate deltas of difficult xz files.
+.SH "ENVIRONMENT"
+.IX Header "ENVIRONMENT"
+.IP "\fB\s-1TMPDIR\s0\fR" 4
+.IX Item "TMPDIR"
+Specifies a location to place temporary files, other than the default.
+.SH "AUTHOR"
+.IX Header "AUTHOR"
+Joey Hess <joeyh@debian.org>,
+Faidon Liambotis <paravoid@debian.org>,
+Cyril Brulebois <cyril.brulebois@enst\-bretagne.fr>
+.PP
+Licensed under the \s-1GPL\s0, version 2.
--- /dev/null
+.\" Automatically generated by Pod::Man 2.25 (Pod::Simple 3.16)
+.\"
+.\" Standard preamble:
+.\" ========================================================================
+.de Sp \" Vertical space (when we can't use .PP)
+.if t .sp .5v
+.if n .sp
+..
+.de Vb \" Begin verbatim text
+.ft CW
+.nf
+.ne \\$1
+..
+.de Ve \" End verbatim text
+.ft R
+.fi
+..
+.\" Set up some character translations and predefined strings. \*(-- will
+.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left
+.\" double quote, and \*(R" will give a right double quote. \*(C+ will
+.\" give a nicer C++. Capital omega is used to do unbreakable dashes and
+.\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff,
+.\" nothing in troff, for use with C<>.
+.tr \(*W-
+.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
+.ie n \{\
+. ds -- \(*W-
+. ds PI pi
+. if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch
+. if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch
+. ds L" ""
+. ds R" ""
+. ds C` ""
+. ds C' ""
+'br\}
+.el\{\
+. ds -- \|\(em\|
+. ds PI \(*p
+. ds L" ``
+. ds R" ''
+'br\}
+.\"
+.\" Escape single quotes in literal strings from groff's Unicode transform.
+.ie \n(.g .ds Aq \(aq
+.el .ds Aq '
+.\"
+.\" If the F register is turned on, we'll generate index entries on stderr for
+.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
+.\" entries marked with X<> in POD. Of course, you'll have to process the
+.\" output yourself in some meaningful fashion.
+.ie \nF \{\
+. de IX
+. tm Index:\\$1\t\\n%\t"\\$2"
+..
+. nr % 0
+. rr F
+.\}
+.el \{\
+. de IX
+..
+.\}
+.\"
+.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
+.\" Fear. Run. Save yourself. No user-serviceable parts.
+. \" fudge factors for nroff and troff
+.if n \{\
+. ds #H 0
+. ds #V .8m
+. ds #F .3m
+. ds #[ \f1
+. ds #] \fP
+.\}
+.if t \{\
+. ds #H ((1u-(\\\\n(.fu%2u))*.13m)
+. ds #V .6m
+. ds #F 0
+. ds #[ \&
+. ds #] \&
+.\}
+. \" simple accents for nroff and troff
+.if n \{\
+. ds ' \&
+. ds ` \&
+. ds ^ \&
+. ds , \&
+. ds ~ ~
+. ds /
+.\}
+.if t \{\
+. ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u"
+. ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u'
+. ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u'
+. ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u'
+. ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u'
+. ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u'
+.\}
+. \" troff and (daisy-wheel) nroff accents
+.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V'
+.ds 8 \h'\*(#H'\(*b\h'-\*(#H'
+.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#]
+.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H'
+.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u'
+.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
+.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
+.ds ae a\h'-(\w'a'u*4/10)'e
+.ds Ae A\h'-(\w'A'u*4/10)'E
+. \" corrections for vroff
+.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
+.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
+. \" for low resolution devices (crt and lpr)
+.if \n(.H>23 .if \n(.V>19 \
+\{\
+. ds : e
+. ds 8 ss
+. ds o a
+. ds d- d\h'-1'\(ga
+. ds D- D\h'-1'\(hy
+. ds th \o'bp'
+. ds Th \o'LP'
+. ds ae ae
+. ds Ae AE
+.\}
+.rm #[ #] #H #V #F C
+.\" ========================================================================
+.\"
+.IX Title "ZGZ 1"
+.TH ZGZ 1 "2012-03-18" "perl v5.14.2" "zgz"
+.\" For nroff, turn off justification. Always turn off hyphenation; it makes
+.\" way too many mistakes in technical documents.
+.if n .ad l
+.nh
+.SH "NAME"
+zgz \- Frankenstein's compressor
+.SH "SYNOPSIS"
+.IX Header "SYNOPSIS"
+\&\fBzgz\fR [options] < file > file.gz
+.SH "DESCRIPTION"
+.IX Header "DESCRIPTION"
+This program is an unholy combination of the \s-1BSD\s0 gzip program, a modified
+\&\s-1GNU\s0 gzip that supports setting an arbitrary file name and timestamp,
+and an old, rotting version of bzip2 that we dug up somewhere at midnight.
+Only the bits to do with file compression were kept.
+.PP
+There are many arcane options which aid pristine-gz(1) in re-animating
+files. Use \-\-help to see all the gory details.
+.SH "AUTHOR"
+.IX Header "AUTHOR"
+Matthew R. Green,
+Jean-loup Gailly,
+Julian R Seward,
+Faidon Liambotis,
+Josh Triplett,
+Joey Hess
+.PP
+Note that several of the above donors would be very suprised at finding
+parts of themselves ... er, their work ... shambling around here. Please
+direct correspondance and/or flaming pitchforks to the pristine-tar
+maintainers.
--- /dev/null
+/* bits.c -- output variable-length bit strings
+
+ Copyright (C) 1999 Free Software Foundation, Inc.
+ Copyright (C) 1992-1993 Jean-loup Gailly
+ Copyright (C) 2008 Josh Triplett
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
+ any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+
+/*
+ * PURPOSE
+ *
+ * Output variable-length bit strings. Compression can be done
+ * to a file or to memory. (The latter is not supported in this version.)
+ *
+ * DISCUSSION
+ *
+ * The PKZIP "deflate" file format interprets compressed file data
+ * as a sequence of bits. Multi-bit strings in the file may cross
+ * byte boundaries without restriction.
+ *
+ * The first bit of each byte is the low-order bit.
+ *
+ * The routines in this file allow a variable-length bit value to
+ * be output right-to-left (useful for literal values). For
+ * left-to-right output (useful for code strings from the tree routines),
+ * the bits must have been reversed first with bi_reverse().
+ *
+ * For in-memory compression, the compressed bit stream goes directly
+ * into the requested output buffer. The input data is read in blocks
+ * by the mem_read() function. The buffer is limited to 64K on 16 bit
+ * machines.
+ *
+ * INTERFACE
+ *
+ * void bi_init (FILE *zipfile)
+ * Initialize the bit string routines.
+ *
+ * void send_bits (int value, int length)
+ * Write out a bit string, taking the source bits right to
+ * left.
+ *
+ * int bi_reverse (int value, int length)
+ * Reverse the bits of a bit string, taking the source bits left to
+ * right and emitting them right to left.
+ *
+ * void bi_windup (void)
+ * Write out any remaining bits in an incomplete byte.
+ *
+ * void copy_block(char *buf, unsigned len, int header)
+ * Copy a stored block to the zip file, storing first the length and
+ * its one's complement if requested.
+ *
+ */
+
+#include "gzip.h"
+
+/* ===========================================================================
+ * Local data used by the "bit string" routines.
+ */
+
+static int zfile; /* output gzip file */
+
+static unsigned short bi_buf;
+/* Output buffer. bits are inserted starting at the bottom (least significant
+ * bits).
+ */
+
+#define Buf_size (8 * 2*sizeof(char))
+/* Number of bits used within bi_buf. (bi_buf might be implemented on
+ * more than 16 bits on some systems.)
+ */
+
+static int bi_valid;
+/* Number of valid bits in bi_buf. All bits above the last valid bit
+ * are always zero.
+ */
+
+int (*read_buf)(char *buf, unsigned size);
+/* Current input function. Set to mem_read for in-memory compression */
+
+/* ===========================================================================
+ * Initialize the bit string routines.
+ */
+void bi_init (int zipfile) /* output zip file, NO_FILE for in-memory compression */
+{
+ zfile = zipfile;
+ bi_buf = 0;
+ bi_valid = 0;
+
+ /* Set the defaults for file compression. They are set by memcompress
+ * for in-memory compression.
+ */
+ if (zfile != NO_FILE) {
+ read_buf = file_read;
+ }
+}
+
+/* ===========================================================================
+ * Send a value on a given number of bits.
+ * IN assertion: length <= 16 and value fits in length bits.
+ */
+void send_bits(int value, /* value to send */
+ int length) /* number of bits */
+{
+ /* If not enough room in bi_buf, use (valid) bits from bi_buf and
+ * (16 - bi_valid) bits from value, leaving (width - (16-bi_valid))
+ * unused bits in value.
+ */
+ if (bi_valid > (int)Buf_size - length) {
+ bi_buf |= (value << bi_valid);
+ put_short(bi_buf);
+ bi_buf = (ush)value >> (Buf_size - bi_valid);
+ bi_valid += length - Buf_size;
+ } else {
+ bi_buf |= value << bi_valid;
+ bi_valid += length;
+ }
+}
+
+/* ===========================================================================
+ * Reverse the first len bits of a code, using straightforward code (a faster
+ * method would use a table)
+ * IN assertion: 1 <= len <= 15
+ */
+unsigned bi_reverse(unsigned code, /* the value to invert */
+ int len) /* its bit length */
+{
+ register unsigned res = 0;
+ do {
+ res |= code & 1;
+ code >>= 1, res <<= 1;
+ } while (--len > 0);
+ return res >> 1;
+}
+
+/* ===========================================================================
+ * Write out any remaining bits in an incomplete byte.
+ */
+void bi_windup(void)
+{
+ if (bi_valid > 8) {
+ put_short(bi_buf);
+ } else if (bi_valid > 0) {
+ put_byte(bi_buf);
+ }
+ bi_buf = 0;
+ bi_valid = 0;
+}
+
+/* ===========================================================================
+ * Copy a stored block to the zip file, storing first the length and its
+ * one's complement if requested.
+ */
+void copy_block(char *buf, /* the input data */
+ unsigned len, /* its length */
+ int header) /* true if block header must be written */
+{
+ bi_windup(); /* align on byte boundary */
+
+ if (header) {
+ put_short((ush)len);
+ put_short((ush)~len);
+ }
+ while (len--) {
+ put_byte(*buf++);
+ }
+}
--- /dev/null
+/* deflate.c -- compress data using the deflation algorithm
+
+ Copyright (C) 1999, 2006 Free Software Foundation, Inc.
+ Copyright (C) 1992-1993 Jean-loup Gailly
+ Copyright (C) 2008 Josh Triplett
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
+ any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+/*
+ * PURPOSE
+ *
+ * Identify new text as repetitions of old text within a fixed-
+ * length sliding window trailing behind the new text.
+ *
+ * DISCUSSION
+ *
+ * The "deflation" process depends on being able to identify portions
+ * of the input text which are identical to earlier input (within a
+ * sliding window trailing behind the input currently being processed).
+ *
+ * The most straightforward technique turns out to be the fastest for
+ * most input files: try all possible matches and select the longest.
+ * The key feature of this algorithm is that insertions into the string
+ * dictionary are very simple and thus fast, and deletions are avoided
+ * completely. Insertions are performed at each input character, whereas
+ * string matches are performed only when the previous match ends. So it
+ * is preferable to spend more time in matches to allow very fast string
+ * insertions and avoid deletions. The matching algorithm for small
+ * strings is inspired from that of Rabin & Karp. A brute force approach
+ * is used to find longer strings when a small match has been found.
+ * A similar algorithm is used in comic (by Jan-Mark Wams) and freeze
+ * (by Leonid Broukhis).
+ * A previous version of this file used a more sophisticated algorithm
+ * (by Fiala and Greene) which is guaranteed to run in linear amortized
+ * time, but has a larger average cost, uses more memory and is patented.
+ * However the F&G algorithm may be faster for some highly redundant
+ * files if the parameter max_chain_length (described below) is too large.
+ *
+ * ACKNOWLEDGEMENTS
+ *
+ * The idea of lazy evaluation of matches is due to Jan-Mark Wams, and
+ * I found it in 'freeze' written by Leonid Broukhis.
+ * Thanks to many info-zippers for bug reports and testing.
+ *
+ * REFERENCES
+ *
+ * APPNOTE.TXT documentation file in PKZIP 1.93a distribution.
+ *
+ * A description of the Rabin and Karp algorithm is given in the book
+ * "Algorithms" by R. Sedgewick, Addison-Wesley, p252.
+ *
+ * Fiala,E.R., and Greene,D.H.
+ * Data Compression with Finite Windows, Comm.ACM, 32,4 (1989) 490-595
+ *
+ * INTERFACE
+ *
+ * void lm_init (int pack_level, ush *flags)
+ * Initialize the "longest match" routines for a new file
+ *
+ * void deflate (void)
+ * Processes a new input file. Sets the compressed length, crc,
+ * deflate flags and internal file attributes.
+ */
+
+#include <stdio.h>
+
+#include "gzip.h"
+
+/* ===========================================================================
+ * Configuration parameters
+ */
+
+#define HASH_BITS 15
+
+#define HASH_SIZE (unsigned)(1<<HASH_BITS)
+#define HASH_MASK (HASH_SIZE-1)
+#define WMASK (WSIZE-1)
+/* HASH_SIZE and WSIZE must be powers of two */
+
+#define NIL 0
+/* Tail of hash chains */
+
+#define FAST 4
+#define SLOW 2
+/* speed options for the general purpose bit flag */
+
+#ifndef TOO_FAR
+# define TOO_FAR 4096
+#endif
+/* Matches of length 3 are discarded if their distance exceeds TOO_FAR */
+
+int RSYNC_WIN = 4096;
+/* Size of rsync window, must be < MAX_DIST */
+
+/* Whether to enable compatability with Debian's old rsyncable patch. */
+int debian_rsyncable = 1;
+
+void disable_debian_rsyncable () {
+ debian_rsyncable = 0;
+ RSYNC_WIN = 8192;
+}
+
+#define RSYNC_SUM_MATCH_DEBIAN(sum) ((sum) % RSYNC_WIN == 0)
+#define RSYNC_SUM_MATCH(sum) (((sum) & (RSYNC_WIN - 1)) == 0)
+/* Whether window sum matches magic value */
+
+/* ===========================================================================
+ * Local data used by the "longest match" routines.
+ */
+
+typedef ush Pos;
+typedef unsigned IPos;
+/* A Pos is an index in the character window. We use short instead of int to
+ * save space in the various tables. IPos is used only for parameter passing.
+ */
+
+static uch window[2L*WSIZE];
+/* Sliding window. Input bytes are read into the second half of the window,
+ * and move to the first half later to keep a dictionary of at least WSIZE
+ * bytes. With this organization, matches are limited to a distance of
+ * WSIZE-MAX_MATCH bytes, but this ensures that IO is always
+ * performed with a length multiple of the block size. Also, it limits
+ * the window size to 64K, which is quite useful on MSDOS.
+ */
+
+Pos prev[WSIZE];
+/* Link to older string with same hash index. To limit the size of this
+ * array to 64K, this link is maintained only for the last 32K strings.
+ * An index in this array is thus a window index modulo 32K.
+ */
+
+Pos head[1<<HASH_BITS];
+/* Heads of the hash chains or NIL. */
+
+ulg window_size = (ulg)2*WSIZE;
+/* window size, 2*WSIZE except for MMAP or BIG_MEM, where it is the
+ * input file length plus MIN_LOOKAHEAD.
+ */
+
+long block_start;
+/* window position at the beginning of the current output block. Gets
+ * negative when the window is moved backwards.
+ */
+
+static unsigned ins_h; /* hash index of string to be inserted */
+
+#define H_SHIFT ((HASH_BITS+MIN_MATCH-1)/MIN_MATCH)
+/* Number of bits by which ins_h and del_h must be shifted at each
+ * input step. It must be such that after MIN_MATCH steps, the oldest
+ * byte no longer takes part in the hash key, that is:
+ * H_SHIFT * MIN_MATCH >= HASH_BITS
+ */
+
+unsigned int prev_length;
+/* Length of the best match at previous step. Matches not greater than this
+ * are discarded. This is used in the lazy match evaluation.
+ */
+
+unsigned strstart; /* start of string to insert */
+unsigned match_start; /* start of matching string */
+static int eofile; /* flag set at end of input file */
+static unsigned lookahead; /* number of valid bytes ahead in window */
+
+unsigned max_chain_length;
+/* To speed up deflation, hash chains are never searched beyond this length.
+ * A higher limit improves compression ratio but degrades the speed.
+ */
+
+static unsigned int max_lazy_match;
+/* Attempt to find a better match only when the current match is strictly
+ * smaller than this value. This mechanism is used only for compression
+ * levels >= 4.
+ */
+#define max_insert_length max_lazy_match
+/* Insert new strings in the hash table only if the match length
+ * is not greater than this length. This saves time but degrades compression.
+ * max_insert_length is used only for compression levels <= 3.
+ */
+
+static unsigned good_match;
+/* Use a faster search when the previous match is longer than this */
+
+static ulg rsync_sum; /* rolling sum of rsync window */
+static ulg rsync_chunk_end; /* next rsync sequence point */
+
+/* Values for max_lazy_match, good_match and max_chain_length, depending on
+ * the desired pack level (0..9). The values given below have been tuned to
+ * exclude worst case performance for pathological files. Better values may be
+ * found for specific files.
+ */
+
+typedef struct config {
+ ush good_length; /* reduce lazy search above this match length */
+ ush max_lazy; /* do not perform lazy search above this match length */
+ ush nice_length; /* quit search above this match length */
+ ush max_chain;
+} config;
+
+#ifdef FULL_SEARCH
+# define nice_match MAX_MATCH
+#else
+ int nice_match; /* Stop searching when current match exceeds this */
+#endif
+
+static config configuration_table[10] = {
+/* good lazy nice chain */
+/* 0 */ {0, 0, 0, 0}, /* store only */
+/* 1 */ {4, 4, 8, 4}, /* maximum speed, no lazy matches */
+/* 2 */ {4, 5, 16, 8},
+/* 3 */ {4, 6, 32, 32},
+
+/* 4 */ {4, 4, 16, 16}, /* lazy matches */
+/* 5 */ {8, 16, 32, 32},
+/* 6 */ {8, 16, 128, 128},
+/* 7 */ {8, 32, 128, 256},
+/* 8 */ {32, 128, 258, 1024},
+/* 9 */ {32, 258, 258, 4096}}; /* maximum compression */
+
+/* Note: the deflate() code requires max_lazy >= MIN_MATCH and max_chain >= 4
+ * For deflate_fast() (levels <= 3) good is ignored and lazy has a different
+ * meaning.
+ */
+
+#define EQUAL 0
+/* result of memcmp for equal strings */
+
+/* ===========================================================================
+ * Prototypes for local functions.
+ */
+static void fill_window(void);
+
+ int longest_match(IPos cur_match);
+
+/* ===========================================================================
+ * Update a hash value with the given input byte
+ * IN assertion: all calls to to UPDATE_HASH are made with consecutive
+ * input characters, so that a running hash key can be computed from the
+ * previous key instead of complete recalculation each time.
+ */
+#define UPDATE_HASH(h,c) (h = (((h)<<H_SHIFT) ^ (c)) & HASH_MASK)
+
+/* ===========================================================================
+ * Insert string s in the dictionary and set match_head to the previous head
+ * of the hash chain (the most recent string with same hash key). Return
+ * the previous length of the hash chain.
+ * IN assertion: all calls to to INSERT_STRING are made with consecutive
+ * input characters and the first MIN_MATCH bytes of s are valid
+ * (except for the last MIN_MATCH-1 bytes of the input file).
+ */
+#define INSERT_STRING(s, match_head) \
+ (UPDATE_HASH(ins_h, window[(s) + MIN_MATCH-1]), \
+ prev[(s) & WMASK] = match_head = head[ins_h], \
+ head[ins_h] = (s))
+
+/* ===========================================================================
+ * Initialize the "longest match" routines for a new file
+ */
+void lm_init (int pack_level, /* 1: best speed, 9: best compression */
+ ush *flags) /* general purpose bit flag */
+{
+ register unsigned j;
+
+ if (pack_level < 1 || pack_level > 9) gzip_error ("bad pack level");
+
+ /* Initialize the hash table. */
+ memzero((char*)head, HASH_SIZE*sizeof(*head));
+ /* prev will be initialized on the fly */
+
+ /* rsync params */
+ rsync_chunk_end = 0xFFFFFFFFUL;
+ rsync_sum = 0;
+
+ /* Set the default configuration parameters:
+ */
+ max_lazy_match = configuration_table[pack_level].max_lazy;
+ good_match = configuration_table[pack_level].good_length;
+#ifndef FULL_SEARCH
+ nice_match = configuration_table[pack_level].nice_length;
+#endif
+ max_chain_length = configuration_table[pack_level].max_chain;
+ if (pack_level == 1) {
+ *flags |= FAST;
+ } else if (pack_level == 9) {
+ *flags |= SLOW;
+ }
+ /* ??? reduce max_chain_length for binary files */
+
+ strstart = 0;
+ block_start = 0L;
+
+ lookahead = read_buf((char*)window,
+ sizeof(int) <= 2 ? (unsigned)WSIZE : 2*WSIZE);
+
+ if (lookahead == 0 || lookahead == (unsigned)EOF) {
+ eofile = 1, lookahead = 0;
+ return;
+ }
+ eofile = 0;
+ /* Make sure that we always have enough lookahead. This is important
+ * if input comes from a device such as a tty.
+ */
+ while (lookahead < MIN_LOOKAHEAD && !eofile) fill_window();
+
+ ins_h = 0;
+ for (j=0; j<MIN_MATCH-1; j++) UPDATE_HASH(ins_h, window[j]);
+ /* If lookahead < MIN_MATCH, ins_h is garbage, but this is
+ * not important since only literal bytes will be emitted.
+ */
+}
+
+/* ===========================================================================
+ * Set match_start to the longest match starting at the given string and
+ * return its length. Matches shorter or equal to prev_length are discarded,
+ * in which case the result is equal to prev_length and match_start is
+ * garbage.
+ * IN assertions: cur_match is the head of the hash chain for the current
+ * string (strstart) and its distance is <= MAX_DIST, and prev_length >= 1
+ */
+int longest_match(IPos cur_match)
+{
+ unsigned chain_length = max_chain_length; /* max hash chain length */
+ register uch *scan = window + strstart; /* current string */
+ register uch *match; /* matched string */
+ register int len; /* length of current match */
+ int best_len = prev_length; /* best match length so far */
+ IPos limit = strstart > (IPos)MAX_DIST ? strstart - (IPos)MAX_DIST : NIL;
+ /* Stop when cur_match becomes <= limit. To simplify the code,
+ * we prevent matches with the string of window index 0.
+ */
+
+/* The code is optimized for HASH_BITS >= 8 and MAX_MATCH-2 multiple of 16.
+ * It is easy to get rid of this optimization if necessary.
+ */
+#if HASH_BITS < 8 || MAX_MATCH != 258
+ error: Code too clever
+#endif
+
+#ifdef UNALIGNED_OK
+ /* Compare two bytes at a time. Note: this is not always beneficial.
+ * Try with and without -DUNALIGNED_OK to check.
+ */
+ register uch *strend = window + strstart + MAX_MATCH - 1;
+ register ush scan_start = *(ush*)scan;
+ register ush scan_end = *(ush*)(scan+best_len-1);
+#else
+ register uch *strend = window + strstart + MAX_MATCH;
+ register uch scan_end1 = scan[best_len-1];
+ register uch scan_end = scan[best_len];
+#endif
+
+ /* Do not waste too much time if we already have a good match: */
+ if (prev_length >= good_match) {
+ chain_length >>= 2;
+ }
+ Assert(strstart <= window_size-MIN_LOOKAHEAD, "insufficient lookahead");
+
+ do {
+ Assert(cur_match < strstart, "no future");
+ match = window + cur_match;
+
+ /* Skip to next match if the match length cannot increase
+ * or if the match length is less than 2:
+ */
+#if (defined(UNALIGNED_OK) && MAX_MATCH == 258)
+ /* This code assumes sizeof(unsigned short) == 2. Do not use
+ * UNALIGNED_OK if your compiler uses a different size.
+ */
+ if (*(ush*)(match+best_len-1) != scan_end ||
+ *(ush*)match != scan_start) continue;
+
+ /* It is not necessary to compare scan[2] and match[2] since they are
+ * always equal when the other bytes match, given that the hash keys
+ * are equal and that HASH_BITS >= 8. Compare 2 bytes at a time at
+ * strstart+3, +5, ... up to strstart+257. We check for insufficient
+ * lookahead only every 4th comparison; the 128th check will be made
+ * at strstart+257. If MAX_MATCH-2 is not a multiple of 8, it is
+ * necessary to put more guard bytes at the end of the window, or
+ * to check more often for insufficient lookahead.
+ */
+ scan++, match++;
+ do {
+ } while (*(ush*)(scan+=2) == *(ush*)(match+=2) &&
+ *(ush*)(scan+=2) == *(ush*)(match+=2) &&
+ *(ush*)(scan+=2) == *(ush*)(match+=2) &&
+ *(ush*)(scan+=2) == *(ush*)(match+=2) &&
+ scan < strend);
+ /* The funny "do {}" generates better code on most compilers */
+
+ /* Here, scan <= window+strstart+257 */
+ Assert(scan <= window+(unsigned)(window_size-1), "wild scan");
+ if (*scan == *match) scan++;
+
+ len = (MAX_MATCH - 1) - (int)(strend-scan);
+ scan = strend - (MAX_MATCH-1);
+
+#else /* UNALIGNED_OK */
+
+ if (match[best_len] != scan_end ||
+ match[best_len-1] != scan_end1 ||
+ *match != *scan ||
+ *++match != scan[1]) continue;
+
+ /* The check at best_len-1 can be removed because it will be made
+ * again later. (This heuristic is not always a win.)
+ * It is not necessary to compare scan[2] and match[2] since they
+ * are always equal when the other bytes match, given that
+ * the hash keys are equal and that HASH_BITS >= 8.
+ */
+ scan += 2, match++;
+
+ /* We check for insufficient lookahead only every 8th comparison;
+ * the 256th check will be made at strstart+258.
+ */
+ do {
+ } while (*++scan == *++match && *++scan == *++match &&
+ *++scan == *++match && *++scan == *++match &&
+ *++scan == *++match && *++scan == *++match &&
+ *++scan == *++match && *++scan == *++match &&
+ scan < strend);
+
+ len = MAX_MATCH - (int)(strend - scan);
+ scan = strend - MAX_MATCH;
+
+#endif /* UNALIGNED_OK */
+
+ if (len > best_len) {
+ match_start = cur_match;
+ best_len = len;
+ if (len >= nice_match) break;
+#ifdef UNALIGNED_OK
+ scan_end = *(ush*)(scan+best_len-1);
+#else
+ scan_end1 = scan[best_len-1];
+ scan_end = scan[best_len];
+#endif
+ }
+ } while ((cur_match = prev[cur_match & WMASK]) > limit
+ && --chain_length != 0);
+
+ return best_len;
+}
+
+/* ===========================================================================
+ * Fill the window when the lookahead becomes insufficient.
+ * Updates strstart and lookahead, and sets eofile if end of input file.
+ * IN assertion: lookahead < MIN_LOOKAHEAD && strstart + lookahead > 0
+ * OUT assertions: at least one byte has been read, or eofile is set;
+ * file reads are performed for at least two bytes (required for the
+ * translate_eol option).
+ */
+static void fill_window(void)
+{
+ register unsigned n, m;
+ unsigned more = (unsigned)(window_size - (ulg)lookahead - (ulg)strstart);
+ /* Amount of free space at the end of the window. */
+
+ /* If the window is almost full and there is insufficient lookahead,
+ * move the upper half to the lower one to make room in the upper half.
+ */
+ if (more == (unsigned)EOF) {
+ /* Very unlikely, but possible on 16 bit machine if strstart == 0
+ * and lookahead == 1 (input done one byte at time)
+ */
+ more--;
+ } else if (strstart >= WSIZE+MAX_DIST) {
+ /* By the IN assertion, the window is not empty so we can't confuse
+ * more == 0 with more == 64K on a 16 bit machine.
+ */
+ Assert(window_size == (ulg)2*WSIZE, "no sliding with BIG_MEM");
+
+ memcpy((char*)window, (char*)window+WSIZE, (unsigned)WSIZE);
+ match_start -= WSIZE;
+ strstart -= WSIZE; /* we now have strstart >= MAX_DIST: */
+ if (rsync_chunk_end != 0xFFFFFFFFUL)
+ rsync_chunk_end -= WSIZE;
+
+ block_start -= (long) WSIZE;
+
+ for (n = 0; n < HASH_SIZE; n++) {
+ m = head[n];
+ head[n] = (Pos)(m >= WSIZE ? m-WSIZE : NIL);
+ }
+ for (n = 0; n < WSIZE; n++) {
+ m = prev[n];
+ prev[n] = (Pos)(m >= WSIZE ? m-WSIZE : NIL);
+ /* If n is not on any hash chain, prev[n] is garbage but
+ * its value will never be used.
+ */
+ }
+ more += WSIZE;
+ }
+ /* At this point, more >= 2 */
+ if (!eofile) {
+ n = read_buf((char*)window+strstart+lookahead, more);
+ if (n == 0 || n == (unsigned)EOF) {
+ eofile = 1;
+ } else {
+ lookahead += n;
+ }
+ }
+}
+
+static void rsync_roll(unsigned start, unsigned num)
+{
+ unsigned i;
+
+ if (start < RSYNC_WIN) {
+ /* before window fills. */
+ for (i = start; i < RSYNC_WIN; i++) {
+ if (i == start + num) return;
+ rsync_sum += (ulg)window[i];
+ }
+ num -= (RSYNC_WIN - start);
+ start = RSYNC_WIN;
+ }
+
+ /* buffer after window full */
+ for (i = start; i < start+num; i++) {
+ /* New character in */
+ rsync_sum += (ulg)window[i];
+ /* Old character out */
+ rsync_sum -= (ulg)window[i - RSYNC_WIN];
+ if (debian_rsyncable && rsync_chunk_end == 0xFFFFFFFFUL && RSYNC_SUM_MATCH_DEBIAN(rsync_sum))
+ rsync_chunk_end = i;
+ if (! debian_rsyncable && rsync_chunk_end == 0xFFFFFFFFUL && RSYNC_SUM_MATCH(rsync_sum))
+ rsync_chunk_end = i;
+ }
+}
+
+/* ===========================================================================
+ * Set rsync_chunk_end if window sum matches magic value.
+ */
+#define RSYNC_ROLL(s, n) \
+ do { if (rsync) rsync_roll((s), (n)); } while(0)
+
+/* ===========================================================================
+ * Flush the current block, with given end-of-file flag.
+ * IN assertion: strstart is set to the end of the current match.
+ */
+#define FLUSH_BLOCK(eof) \
+ flush_block(block_start >= 0L ? (char*)&window[(unsigned)block_start] : \
+ (char*)NULL, (long)strstart - block_start, flush-1, (eof))
+
+/* ===========================================================================
+ * Processes a new input file and return its compressed length. This
+ * function does not perform lazy evaluationof matches and inserts
+ * new strings in the dictionary only for unmatched strings or for short
+ * matches. It is used only for the fast compression options.
+ */
+static void deflate_fast(int pack_level, int rsync)
+{
+ IPos hash_head; /* head of the hash chain */
+ int flush = 0; /* set if current block must be flushed, 2=>and padded */
+ unsigned match_length = 0; /* length of best match */
+
+ prev_length = MIN_MATCH-1;
+ while (lookahead != 0) {
+ /* Insert the string window[strstart .. strstart+2] in the
+ * dictionary, and set hash_head to the head of the hash chain:
+ */
+ INSERT_STRING(strstart, hash_head);
+
+ /* Find the longest match, discarding those <= prev_length.
+ * At this point we have always match_length < MIN_MATCH
+ */
+ if (hash_head != NIL && strstart - hash_head <= MAX_DIST
+ && strstart <= window_size - MIN_LOOKAHEAD) {
+ /* To simplify the code, we prevent matches with the string
+ * of window index 0 (in particular we have to avoid a match
+ * of the string with itself at the start of the input file).
+ */
+ match_length = longest_match (hash_head);
+ /* longest_match() sets match_start */
+ if (match_length > lookahead) match_length = lookahead;
+ }
+ if (match_length >= MIN_MATCH) {
+ flush = ct_tally(pack_level, strstart-match_start, match_length - MIN_MATCH);
+
+ lookahead -= match_length;
+
+ RSYNC_ROLL(strstart, match_length);
+ /* Insert new strings in the hash table only if the match length
+ * is not too large. This saves time but degrades compression.
+ */
+ if (match_length <= max_insert_length) {
+ match_length--; /* string at strstart already in hash table */
+ do {
+ strstart++;
+ INSERT_STRING(strstart, hash_head);
+ /* strstart never exceeds WSIZE-MAX_MATCH, so there are
+ * always MIN_MATCH bytes ahead. If lookahead < MIN_MATCH
+ * these bytes are garbage, but it does not matter since
+ * the next lookahead bytes will be emitted as literals.
+ */
+ } while (--match_length != 0);
+ strstart++;
+ } else {
+ strstart += match_length;
+ match_length = 0;
+ ins_h = window[strstart];
+ UPDATE_HASH(ins_h, window[strstart+1]);
+#if MIN_MATCH != 3
+ Call UPDATE_HASH() MIN_MATCH-3 more times
+#endif
+ }
+ } else {
+ /* No match, output a literal byte */
+ Tracevv((stderr,"%c",window[strstart]));
+ flush = ct_tally (pack_level, 0, window[strstart]);
+ RSYNC_ROLL(strstart, 1);
+ lookahead--;
+ strstart++;
+ }
+ if (rsync && debian_rsyncable && strstart > rsync_chunk_end) {
+ rsync_chunk_end = 0xFFFFFFFFUL;
+ flush = 2;
+ }
+ if (rsync && ! debian_rsyncable && strstart > rsync_chunk_end) {
+ flush = 1;
+ ct_init();
+ rsync_chunk_end = 0xFFFFFFFFUL;
+ }
+ if (flush) FLUSH_BLOCK(0), block_start = strstart;
+
+ /* Make sure that we always have enough lookahead, except
+ * at the end of the input file. We need MAX_MATCH bytes
+ * for the next match, plus MIN_MATCH bytes to insert the
+ * string following the next match.
+ */
+ while (lookahead < MIN_LOOKAHEAD && !eofile) fill_window();
+
+ }
+ FLUSH_BLOCK(1); /* eof */
+}
+
+/* ===========================================================================
+ * Same as above, but achieves better compression. We use a lazy
+ * evaluation for matches: a match is finally adopted only if there is
+ * no better match at the next window position.
+ */
+void gnu_deflate(int pack_level, int rsync, int newrsync)
+{
+ IPos hash_head; /* head of hash chain */
+ IPos prev_match; /* previous match */
+ int flush = 0; /* set if current block must be flushed */
+ int match_available = 0; /* set if previous match exists */
+ register unsigned match_length = MIN_MATCH-1; /* length of best match */
+
+ /* The newrsync mode superscedes Debian's old, somewhat broken
+ * rsync patch. */
+ if (newrsync) {
+ rsync=1;
+ disable_debian_rsyncable();
+ }
+
+ if (pack_level <= 3) {
+ deflate_fast(pack_level, rsync); /* optimized for speed */
+ return;
+ }
+
+ /* Process the input block. */
+ while (lookahead != 0) {
+ /* Insert the string window[strstart .. strstart+2] in the
+ * dictionary, and set hash_head to the head of the hash chain:
+ */
+ INSERT_STRING(strstart, hash_head);
+
+ /* Find the longest match, discarding those <= prev_length.
+ */
+ prev_length = match_length, prev_match = match_start;
+ match_length = MIN_MATCH-1;
+
+ if (hash_head != NIL && prev_length < max_lazy_match &&
+ strstart - hash_head <= MAX_DIST &&
+ strstart <= window_size - MIN_LOOKAHEAD) {
+ /* To simplify the code, we prevent matches with the string
+ * of window index 0 (in particular we have to avoid a match
+ * of the string with itself at the start of the input file).
+ */
+ match_length = longest_match (hash_head);
+ /* longest_match() sets match_start */
+ if (match_length > lookahead) match_length = lookahead;
+
+ /* Ignore a length 3 match if it is too distant: */
+ if (match_length == MIN_MATCH && strstart-match_start > TOO_FAR){
+ /* If prev_match is also MIN_MATCH, match_start is garbage
+ * but we will ignore the current match anyway.
+ */
+ match_length--;
+ }
+ }
+ /* If there was a match at the previous step and the current
+ * match is not better, output the previous match:
+ */
+ if (prev_length >= MIN_MATCH && match_length <= prev_length) {
+ flush = ct_tally(pack_level, strstart-1-prev_match, prev_length - MIN_MATCH);
+
+ /* Insert in hash table all strings up to the end of the match.
+ * strstart-1 and strstart are already inserted.
+ */
+ lookahead -= prev_length-1;
+ prev_length -= 2;
+ RSYNC_ROLL(strstart, prev_length+1);
+ do {
+ strstart++;
+ INSERT_STRING(strstart, hash_head);
+ /* strstart never exceeds WSIZE-MAX_MATCH, so there are
+ * always MIN_MATCH bytes ahead. If lookahead < MIN_MATCH
+ * these bytes are garbage, but it does not matter since the
+ * next lookahead bytes will always be emitted as literals.
+ */
+ } while (--prev_length != 0);
+ match_available = 0;
+ match_length = MIN_MATCH-1;
+ strstart++;
+
+ if (rsync && debian_rsyncable && strstart > rsync_chunk_end) {
+ rsync_chunk_end = 0xFFFFFFFFUL;
+ flush = 2;
+ }
+ if (rsync && ! debian_rsyncable && strstart > rsync_chunk_end) {
+ ct_init();
+ rsync_chunk_end = 0xFFFFFFFFUL;
+ flush = 1;
+ }
+ if (flush) FLUSH_BLOCK(0), block_start = strstart;
+ } else if (match_available) {
+ /* If there was no match at the previous position, output a
+ * single literal. If there was a match but the current match
+ * is longer, truncate the previous match to a single literal.
+ */
+ Tracevv((stderr,"%c",window[strstart-1]));
+ flush = ct_tally (pack_level, 0, window[strstart-1]);
+ if (rsync && debian_rsyncable && strstart > rsync_chunk_end) {
+ rsync_chunk_end = 0xFFFFFFFFUL;
+ flush = 2;
+ }
+ if (rsync && ! debian_rsyncable && strstart > rsync_chunk_end) {
+ ct_init();
+ rsync_chunk_end = 0xFFFFFFFFUL;
+ flush = 1;
+ }
+ if (flush) FLUSH_BLOCK(0), block_start = strstart;
+ RSYNC_ROLL(strstart, 1);
+ strstart++;
+ lookahead--;
+ } else {
+ /* There is no previous match to compare with, wait for
+ * the next step to decide.
+ */
+ if (rsync && debian_rsyncable && strstart > rsync_chunk_end) {
+ /* Reset huffman tree */
+ rsync_chunk_end = 0xFFFFFFFFUL;
+ flush = 2;
+ FLUSH_BLOCK(0), block_start = strstart;
+ }
+ if (rsync && ! debian_rsyncable && strstart > rsync_chunk_end) {
+ ct_init();
+ /* Reset huffman tree */
+ rsync_chunk_end = 0xFFFFFFFFUL;
+ FLUSH_BLOCK(0), block_start = strstart;
+ }
+ match_available = 1;
+ RSYNC_ROLL(strstart, 1);
+ strstart++;
+ lookahead--;
+ }
+ /* Assert (strstart <= bytes_in && lookahead <= bytes_in, "a bit too far"); */
+
+ /* Make sure that we always have enough lookahead, except
+ * at the end of the input file. We need MAX_MATCH bytes
+ * for the next match, plus MIN_MATCH bytes to insert the
+ * string following the next match.
+ */
+ while (lookahead < MIN_LOOKAHEAD && !eofile) fill_window();
+ }
+ if (match_available) ct_tally (pack_level, 0, window[strstart-1]);
+
+ FLUSH_BLOCK(1); /* eof */
+}
--- /dev/null
+/* zip.c -- compress files to the gzip or pkzip format
+
+ Copyright (C) 1997, 1998, 1999, 2006, 2007 Free Software Foundation, Inc.
+ Copyright (C) 1992-1993 Jean-loup Gailly
+ Copyright (C) 2008 Josh Triplett
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
+ any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+#include <ctype.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include "gzip.h"
+
+uch outbuf[OUTBUFSIZ];
+unsigned outcnt; /* bytes in output buffer */
+
+static ulg crc; /* crc on uncompressed file data */
+
+static int ifd; /* input file descriptor */
+static int ofd; /* output file descriptor */
+
+static off_t bytes_in; /* number of input bytes */
+
+/* ===========================================================================
+ * Deflate in to out.
+ * IN assertions: the input and output buffers are cleared.
+ */
+void gnuzip(int in, int out, char *origname, ulg timestamp, int level, int osflag, int rsync, int newrsync)
+{
+ uch flags = 0; /* general purpose bit flags */
+ ush deflate_flags = 0; /* pkzip -es, -en or -ex equivalent */
+
+ ifd = in;
+ ofd = out;
+ outcnt = 0;
+ bytes_in = 0L;
+
+ /* Write the header to the gzip file. */
+
+ put_byte(GZIP_MAGIC[0]); /* magic header */
+ put_byte(GZIP_MAGIC[1]);
+ put_byte(DEFLATED); /* compression method */
+
+ if (origname)
+ flags |= ORIG_NAME;
+ put_byte(flags); /* general flags */
+ put_long(timestamp);
+
+ /* Write deflated file to zip file */
+ crc = updcrc(0, 0);
+
+ bi_init(out);
+ ct_init();
+ lm_init(level, &deflate_flags);
+
+ put_byte((uch)deflate_flags); /* extra flags */
+ put_byte(osflag); /* OS identifier */
+
+ if (origname) {
+ char *p = origname;
+ do {
+ put_byte(*p);
+ } while (*p++);
+ }
+
+ gnu_deflate(level, rsync, newrsync);
+
+ /* Write the crc and uncompressed size */
+ put_long(crc);
+ put_long((ulg)bytes_in);
+
+ flush_outbuf();
+}
+
+
+/* ===========================================================================
+ * Read a new buffer from the current input file, perform end-of-line
+ * translation, and update the crc and input file size.
+ * IN assertion: size >= 2 (for end-of-line translation)
+ */
+int file_read(char *buf, unsigned size)
+{
+ unsigned len;
+
+ len = read_buffer (ifd, buf, size);
+ if (len == 0) return (int)len;
+ if (len == (unsigned)-1) {
+ read_error();
+ return EOF;
+ }
+
+ crc = updcrc((uch*)buf, len);
+ bytes_in += (off_t)len;
+ return (int)len;
+}
+
+/* ===========================================================================
+ * Write the output buffer outbuf[0..outcnt-1].
+ * (used for the compressed data only)
+ */
+void flush_outbuf(void)
+{
+ if (outcnt == 0) return;
+
+ write_buf(ofd, (char *)outbuf, outcnt);
+ outcnt = 0;
+}
--- /dev/null
+/* gzip.h -- common declarations for all gzip modules
+
+ Copyright (C) 1997, 1998, 1999, 2001, 2006, 2007 Free Software
+ Foundation, Inc.
+ Copyright (C) 1992-1993 Jean-loup Gailly.
+ Copyright (C) 2008 Josh Triplett
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
+ any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+#define BITS 16
+
+#ifndef __attribute__
+# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8) || __STRICT_ANSI__
+# define __attribute__(x)
+# endif
+#endif
+
+#define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))
+
+/* I don't like nested includes, but the following headers are used
+ * too often
+ */
+#include <stdio.h>
+#include <sys/types.h> /* for off_t */
+#include <time.h>
+#include <string.h>
+#define memzero(s, n) memset ((s), 0, (n))
+
+typedef unsigned char uch;
+typedef unsigned short ush;
+typedef unsigned long ulg;
+
+/* Return codes from gzip */
+#define OK 0
+#define ERROR 1
+
+/* Compression methods */
+#define DEFLATED 8
+
+#define INBUFSIZ 0x8000 /* input buffer size */
+#define OUTBUFSIZ 16384 /* output buffer size */
+#define DIST_BUFSIZE 0x8000 /* buffer for distances, see trees.c */
+
+extern uch outbuf[]; /* output buffer */
+
+extern unsigned outcnt; /* bytes in output buffer */
+
+#define NO_FILE (-1) /* in memory compression */
+
+
+#define GZIP_MAGIC "\037\213" /* Magic header for gzip files, 1F 8B */
+#define OLD_GZIP_MAGIC "\037\236" /* Magic header for gzip 0.5 = freeze 1.x */
+#define PKZIP_MAGIC "\120\113\003\004" /* Magic header for pkzip files */
+
+/* gzip flag byte */
+#define ASCII_FLAG 0x01 /* bit 0 set: file probably ascii text */
+#define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip file */
+#define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */
+#define ORIG_NAME 0x08 /* bit 3 set: original file name present */
+#define COMMENT 0x10 /* bit 4 set: file comment present */
+#define ENCRYPTED 0x20 /* bit 5 set: file is encrypted */
+#define RESERVED 0xC0 /* bit 6,7: reserved */
+
+/* internal file attribute */
+#define UNKNOWN 0xffff
+#define BINARY 0
+#define ASCII 1
+
+#define WSIZE 0x8000 /* window size--must be a power of two, and */
+ /* at least 32K for zip's deflate method */
+
+#define MIN_MATCH 3
+#define MAX_MATCH 258
+/* The minimum and maximum match lengths */
+
+#define MIN_LOOKAHEAD (MAX_MATCH+MIN_MATCH+1)
+/* Minimum amount of lookahead, except at the end of the input file.
+ * See deflate.c for comments about the MIN_MATCH+1.
+ */
+
+#define MAX_DIST (WSIZE-MIN_LOOKAHEAD)
+/* In order to simplify the code, particularly on 16 bit machines, match
+ * distances are limited to MAX_DIST instead of WSIZE.
+ */
+
+/* put_byte is used for the compressed output. */
+#define put_byte(c) {outbuf[outcnt++]=(uch)(c); if (outcnt==OUTBUFSIZ)\
+ flush_outbuf();}
+
+/* Output a 16 bit value, lsb first */
+#define put_short(w) \
+{ if (outcnt < OUTBUFSIZ-2) { \
+ outbuf[outcnt++] = (uch) ((w) & 0xff); \
+ outbuf[outcnt++] = (uch) ((ush)(w) >> 8); \
+ } else { \
+ put_byte((uch)((w) & 0xff)); \
+ put_byte((uch)((ush)(w) >> 8)); \
+ } \
+}
+
+/* Output a 32 bit value to the bit stream, lsb first */
+#define put_long(n) { \
+ put_short((n) & 0xffff); \
+ put_short(((ulg)(n)) >> 16); \
+}
+
+/* Diagnostic functions */
+#define Assert(cond,msg)
+#define Trace(x)
+#define Tracev(x)
+#define Tracevv(x)
+#define Tracec(c,x)
+#define Tracecv(c,x)
+
+ /* in zip.c: */
+extern int file_read(char *buf, unsigned size);
+
+ /* in deflate.c */
+void lm_init(int pack_level, ush *flags);
+void gnu_deflate(int pack_level, int rsync, int newrsync);
+
+ /* in trees.c */
+void ct_init(void);
+int ct_tally(int pack_level, int dist, int lc);
+void flush_block(char *buf, ulg stored_len, int pad, int eof);
+
+ /* in bits.c */
+void bi_init(int zipfile);
+void send_bits(int value, int length);
+unsigned bi_reverse(unsigned value, int length);
+void bi_windup(void);
+void copy_block(char *buf, unsigned len, int header);
+extern int (*read_buf)(char *buf, unsigned size);
+
+ /* in util.c: */
+extern ulg updcrc(uch *s, unsigned n);
+extern void flush_outbuf(void);
+extern void write_buf(int fd, void *buf, unsigned cnt);
+extern int read_buffer(int fd, void *buf, unsigned int cnt);
+extern void gzip_error(char *m);
+extern void read_error(void);
+extern void write_error(void);
--- /dev/null
+/* trees.c -- output deflated data using Huffman coding
+
+ Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
+ Copyright (C) 1992-1993 Jean-loup Gailly
+ Copyright (C) 2008 Josh Triplett
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
+ any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+/*
+ * PURPOSE
+ *
+ * Encode various sets of source values using variable-length
+ * binary code trees.
+ *
+ * DISCUSSION
+ *
+ * The PKZIP "deflation" process uses several Huffman trees. The more
+ * common source values are represented by shorter bit sequences.
+ *
+ * Each code tree is stored in the ZIP file in a compressed form
+ * which is itself a Huffman encoding of the lengths of
+ * all the code strings (in ascending order by source values).
+ * The actual code strings are reconstructed from the lengths in
+ * the UNZIP process, as described in the "application note"
+ * (APPNOTE.TXT) distributed as part of PKWARE's PKZIP program.
+ *
+ * REFERENCES
+ *
+ * Lynch, Thomas J.
+ * Data Compression: Techniques and Applications, pp. 53-55.
+ * Lifetime Learning Publications, 1985. ISBN 0-534-03418-7.
+ *
+ * Storer, James A.
+ * Data Compression: Methods and Theory, pp. 49-50.
+ * Computer Science Press, 1988. ISBN 0-7167-8156-5.
+ *
+ * Sedgewick, R.
+ * Algorithms, p290.
+ * Addison-Wesley, 1983. ISBN 0-201-06672-6.
+ *
+ * INTERFACE
+ *
+ * void ct_init (void)
+ * Allocate the match buffer and initialize the various tables
+ *
+ * void ct_tally (int pack_level, int dist, int lc);
+ * Save the match info and tally the frequency counts.
+ *
+ * void flush_block (char *buf, ulg stored_len, int pad, int eof)
+ * Determine the best encoding for the current block: dynamic trees,
+ * static trees or store, and output the encoded block to the zip
+ * file. If pad is set, pads the block to the next byte.
+ * */
+
+#include <ctype.h>
+
+#include "gzip.h"
+
+/* ===========================================================================
+ * Constants
+ */
+
+#define MAX_BITS 15
+/* All codes must not exceed MAX_BITS bits */
+
+#define MAX_BL_BITS 7
+/* Bit length codes must not exceed MAX_BL_BITS bits */
+
+#define LENGTH_CODES 29
+/* number of length codes, not counting the special END_BLOCK code */
+
+#define LITERALS 256
+/* number of literal bytes 0..255 */
+
+#define END_BLOCK 256
+/* end of block literal code */
+
+#define L_CODES (LITERALS+1+LENGTH_CODES)
+/* number of Literal or Length codes, including the END_BLOCK code */
+
+#define D_CODES 30
+/* number of distance codes */
+
+#define BL_CODES 19
+/* number of codes used to transfer the bit lengths */
+
+
+static int extra_lbits[LENGTH_CODES] /* extra bits for each length code */
+ = {0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0};
+
+static int extra_dbits[D_CODES] /* extra bits for each distance code */
+ = {0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13};
+
+static int extra_blbits[BL_CODES]/* extra bits for each bit length code */
+ = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,3,7};
+
+#define STORED_BLOCK 0
+#define STATIC_TREES 1
+#define DYN_TREES 2
+/* The three kinds of block type */
+
+#define LIT_BUFSIZE 0x8000
+/* Sizes of match buffers for literals/lengths and distances. There are
+ * 4 reasons for limiting LIT_BUFSIZE to 64K:
+ * - frequencies can be kept in 16 bit counters
+ * - if compression is not successful for the first block, all input data is
+ * still in the window so we can still emit a stored block even when input
+ * comes from standard input. (This can also be done for all blocks if
+ * LIT_BUFSIZE is not greater than 32K.)
+ * - if compression is not successful for a file smaller than 64K, we can
+ * even emit a stored file instead of a stored block (saving 5 bytes).
+ * - creating new Huffman trees less frequently may not provide fast
+ * adaptation to changes in the input data statistics. (Take for
+ * example a binary file with poorly compressible code followed by
+ * a highly compressible string table.) Smaller buffer sizes give
+ * fast adaptation but have of course the overhead of transmitting trees
+ * more frequently.
+ * - I can't count above 4
+ * The current code is general and allows DIST_BUFSIZE < LIT_BUFSIZE (to save
+ * memory at the expense of compression). Some optimizations would be possible
+ * if we rely on DIST_BUFSIZE == LIT_BUFSIZE.
+ */
+
+#define REP_3_6 16
+/* repeat previous bit length 3-6 times (2 bits of repeat count) */
+
+#define REPZ_3_10 17
+/* repeat a zero length 3-10 times (3 bits of repeat count) */
+
+#define REPZ_11_138 18
+/* repeat a zero length 11-138 times (7 bits of repeat count) */
+
+/* ===========================================================================
+ * Local data
+ */
+
+/* Data structure describing a single value and its code string. */
+typedef struct ct_data {
+ union {
+ ush freq; /* frequency count */
+ ush code; /* bit string */
+ } fc;
+ union {
+ ush dad; /* father node in Huffman tree */
+ ush len; /* length of bit string */
+ } dl;
+} ct_data;
+
+#define Freq fc.freq
+#define Code fc.code
+#define Dad dl.dad
+#define Len dl.len
+
+#define HEAP_SIZE (2*L_CODES+1)
+/* maximum heap size */
+
+static ct_data dyn_ltree[HEAP_SIZE]; /* literal and length tree */
+static ct_data dyn_dtree[2*D_CODES+1]; /* distance tree */
+
+static ct_data static_ltree[L_CODES+2];
+/* The static literal tree. Since the bit lengths are imposed, there is no
+ * need for the L_CODES extra codes used during heap construction. However
+ * The codes 286 and 287 are needed to build a canonical tree (see ct_init
+ * below).
+ */
+
+static ct_data static_dtree[D_CODES];
+/* The static distance tree. (Actually a trivial tree since all codes use
+ * 5 bits.)
+ */
+
+static ct_data bl_tree[2*BL_CODES+1];
+/* Huffman tree for the bit lengths */
+
+typedef struct tree_desc {
+ ct_data *dyn_tree; /* the dynamic tree */
+ ct_data *static_tree; /* corresponding static tree or NULL */
+ int *extra_bits; /* extra bits for each code or NULL */
+ int extra_base; /* base index for extra_bits */
+ int elems; /* max number of elements in the tree */
+ int max_length; /* max bit length for the codes */
+ int max_code; /* largest code with non zero frequency */
+} tree_desc;
+
+static tree_desc l_desc =
+{dyn_ltree, static_ltree, extra_lbits, LITERALS+1, L_CODES, MAX_BITS, 0};
+
+static tree_desc d_desc =
+{dyn_dtree, static_dtree, extra_dbits, 0, D_CODES, MAX_BITS, 0};
+
+static tree_desc bl_desc =
+{bl_tree, (ct_data *)0, extra_blbits, 0, BL_CODES, MAX_BL_BITS, 0};
+
+
+static ush bl_count[MAX_BITS+1];
+/* number of codes at each bit length for an optimal tree */
+
+static uch bl_order[BL_CODES]
+ = {16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15};
+/* The lengths of the bit length codes are sent in order of decreasing
+ * probability, to avoid transmitting the lengths for unused bit length codes.
+ */
+
+static int heap[2*L_CODES+1]; /* heap used to build the Huffman trees */
+static int heap_len; /* number of elements in the heap */
+static int heap_max; /* element of largest frequency */
+/* The sons of heap[n] are heap[2*n] and heap[2*n+1]. heap[0] is not used.
+ * The same heap array is used to build all trees.
+ */
+
+static uch depth[2*L_CODES+1];
+/* Depth of each subtree used as tie breaker for trees of equal frequency */
+
+static uch length_code[MAX_MATCH-MIN_MATCH+1];
+/* length code for each normalized match length (0 == MIN_MATCH) */
+
+static uch dist_code[512];
+/* distance codes. The first 256 values correspond to the distances
+ * 3 .. 258, the last 256 values correspond to the top 8 bits of
+ * the 15 bit distances.
+ */
+
+static int base_length[LENGTH_CODES];
+/* First normalized length for each code (0 = MIN_MATCH) */
+
+static int base_dist[D_CODES];
+/* First normalized distance for each code (0 = distance of 1) */
+
+static uch l_buf[INBUFSIZ]; /* buffer for literals or lengths */
+static ush d_buf[DIST_BUFSIZE]; /* buffer for distances */
+
+static uch flag_buf[(LIT_BUFSIZE/8)];
+/* flag_buf is a bit array distinguishing literals from lengths in
+ * l_buf, thus indicating the presence or absence of a distance.
+ */
+
+static unsigned last_lit; /* running index in l_buf */
+static unsigned last_dist; /* running index in d_buf */
+static unsigned last_flags; /* running index in flag_buf */
+static uch flags; /* current flags not yet saved in flag_buf */
+static uch flag_bit; /* current bit used in flags */
+/* bits are filled in flags starting at bit 0 (least significant).
+ * Note: these flags are overkill in the current code since we don't
+ * take advantage of DIST_BUFSIZE == LIT_BUFSIZE.
+ */
+
+static ulg opt_len; /* bit length of current block with optimal trees */
+static ulg static_len; /* bit length of current block with static trees */
+
+static off_t compressed_len; /* total bit length of compressed file */
+
+extern long block_start; /* window offset of current block */
+extern unsigned strstart; /* window offset of current string */
+
+/* ===========================================================================
+ * Local (static) routines in this file.
+ */
+
+static void init_block(void);
+static void pqdownheap(ct_data *tree, int k);
+static void gen_bitlen(tree_desc *desc);
+static void gen_codes(ct_data *tree, int max_code);
+static void build_tree(tree_desc *desc);
+static void scan_tree(ct_data *tree, int max_code);
+static void send_tree(ct_data *tree, int max_code);
+static int build_bl_tree(void);
+static void send_all_trees(int lcodes, int dcodes, int blcodes);
+static void compress_block(ct_data *ltree, ct_data *dtree);
+
+#define send_code(c, tree) send_bits(tree[c].Code, tree[c].Len)
+/* Send a code of the given tree. c and tree must not have side effects */
+
+#define d_code(dist) \
+ ((dist) < 256 ? dist_code[dist] : dist_code[256+((dist)>>7)])
+/* Mapping from a distance to a distance code. dist is the distance - 1 and
+ * must not have side effects. dist_code[256] and dist_code[257] are never
+ * used.
+ */
+
+#define MAX(a,b) (a >= b ? a : b)
+/* the arguments must not have side effects */
+
+/* ===========================================================================
+ * Allocate the match buffer and initialize the various tables
+ */
+void ct_init(void)
+{
+ int n; /* iterates over tree elements */
+ int bits; /* bit counter */
+ int length; /* length value */
+ int code; /* code value */
+ int dist; /* distance index */
+
+ compressed_len = 0L;
+
+ if (static_dtree[0].Len != 0) return; /* ct_init already called */
+
+ /* Initialize the mapping length (0..255) -> length code (0..28) */
+ length = 0;
+ for (code = 0; code < LENGTH_CODES-1; code++) {
+ base_length[code] = length;
+ for (n = 0; n < (1<<extra_lbits[code]); n++) {
+ length_code[length++] = (uch)code;
+ }
+ }
+ Assert (length == 256, "ct_init: length != 256");
+ /* Note that the length 255 (match length 258) can be represented
+ * in two different ways: code 284 + 5 bits or code 285, so we
+ * overwrite length_code[255] to use the best encoding:
+ */
+ length_code[length-1] = (uch)code;
+
+ /* Initialize the mapping dist (0..32K) -> dist code (0..29) */
+ dist = 0;
+ for (code = 0 ; code < 16; code++) {
+ base_dist[code] = dist;
+ for (n = 0; n < (1<<extra_dbits[code]); n++) {
+ dist_code[dist++] = (uch)code;
+ }
+ }
+ Assert (dist == 256, "ct_init: dist != 256");
+ dist >>= 7; /* from now on, all distances are divided by 128 */
+ for ( ; code < D_CODES; code++) {
+ base_dist[code] = dist << 7;
+ for (n = 0; n < (1<<(extra_dbits[code]-7)); n++) {
+ dist_code[256 + dist++] = (uch)code;
+ }
+ }
+ Assert (dist == 256, "ct_init: 256+dist != 512");
+
+ /* Construct the codes of the static literal tree */
+ for (bits = 0; bits <= MAX_BITS; bits++) bl_count[bits] = 0;
+ n = 0;
+ while (n <= 143) static_ltree[n++].Len = 8, bl_count[8]++;
+ while (n <= 255) static_ltree[n++].Len = 9, bl_count[9]++;
+ while (n <= 279) static_ltree[n++].Len = 7, bl_count[7]++;
+ while (n <= 287) static_ltree[n++].Len = 8, bl_count[8]++;
+ /* Codes 286 and 287 do not exist, but we must include them in the
+ * tree construction to get a canonical Huffman tree (longest code
+ * all ones)
+ */
+ gen_codes((ct_data *)static_ltree, L_CODES+1);
+
+ /* The static distance tree is trivial: */
+ for (n = 0; n < D_CODES; n++) {
+ static_dtree[n].Len = 5;
+ static_dtree[n].Code = bi_reverse(n, 5);
+ }
+
+ /* Initialize the first block of the first file: */
+ init_block();
+}
+
+/* ===========================================================================
+ * Initialize a new block.
+ */
+static void init_block(void)
+{
+ int n; /* iterates over tree elements */
+
+ /* Initialize the trees. */
+ for (n = 0; n < L_CODES; n++) dyn_ltree[n].Freq = 0;
+ for (n = 0; n < D_CODES; n++) dyn_dtree[n].Freq = 0;
+ for (n = 0; n < BL_CODES; n++) bl_tree[n].Freq = 0;
+
+ dyn_ltree[END_BLOCK].Freq = 1;
+ opt_len = static_len = 0L;
+ last_lit = last_dist = last_flags = 0;
+ flags = 0; flag_bit = 1;
+}
+
+#define SMALLEST 1
+/* Index within the heap array of least frequent node in the Huffman tree */
+
+
+/* ===========================================================================
+ * Remove the smallest element from the heap and recreate the heap with
+ * one less element. Updates heap and heap_len.
+ */
+#define pqremove(tree, top) \
+{\
+ top = heap[SMALLEST]; \
+ heap[SMALLEST] = heap[heap_len--]; \
+ pqdownheap(tree, SMALLEST); \
+}
+
+/* ===========================================================================
+ * Compares to subtrees, using the tree depth as tie breaker when
+ * the subtrees have equal frequency. This minimizes the worst case length.
+ */
+#define smaller(tree, n, m) \
+ (tree[n].Freq < tree[m].Freq || \
+ (tree[n].Freq == tree[m].Freq && depth[n] <= depth[m]))
+
+/* ===========================================================================
+ * Restore the heap property by moving down the tree starting at node k,
+ * exchanging a node with the smallest of its two sons if necessary, stopping
+ * when the heap property is re-established (each father smaller than its
+ * two sons).
+ */
+static void pqdownheap(ct_data *tree, /* the tree to restore */
+ int k) /* node to move down */
+{
+ int v = heap[k];
+ int j = k << 1; /* left son of k */
+ while (j <= heap_len) {
+ /* Set j to the smallest of the two sons: */
+ if (j < heap_len && smaller(tree, heap[j+1], heap[j])) j++;
+
+ /* Exit if v is smaller than both sons */
+ if (smaller(tree, v, heap[j])) break;
+
+ /* Exchange v with the smallest son */
+ heap[k] = heap[j]; k = j;
+
+ /* And continue down the tree, setting j to the left son of k */
+ j <<= 1;
+ }
+ heap[k] = v;
+}
+
+/* ===========================================================================
+ * Compute the optimal bit lengths for a tree and update the total bit length
+ * for the current block.
+ * IN assertion: the fields freq and dad are set, heap[heap_max] and
+ * above are the tree nodes sorted by increasing frequency.
+ * OUT assertions: the field len is set to the optimal bit length, the
+ * array bl_count contains the frequencies for each bit length.
+ * The length opt_len is updated; static_len is also updated if stree is
+ * not null.
+ */
+static void gen_bitlen(tree_desc *desc)
+{
+ ct_data *tree = desc->dyn_tree;
+ int *extra = desc->extra_bits;
+ int base = desc->extra_base;
+ int max_code = desc->max_code;
+ int max_length = desc->max_length;
+ ct_data *stree = desc->static_tree;
+ int h; /* heap index */
+ int n, m; /* iterate over the tree elements */
+ int bits; /* bit length */
+ int xbits; /* extra bits */
+ ush f; /* frequency */
+ int overflow = 0; /* number of elements with bit length too large */
+
+ for (bits = 0; bits <= MAX_BITS; bits++) bl_count[bits] = 0;
+
+ /* In a first pass, compute the optimal bit lengths (which may
+ * overflow in the case of the bit length tree).
+ */
+ tree[heap[heap_max]].Len = 0; /* root of the heap */
+
+ for (h = heap_max+1; h < HEAP_SIZE; h++) {
+ n = heap[h];
+ bits = tree[tree[n].Dad].Len + 1;
+ if (bits > max_length) bits = max_length, overflow++;
+ tree[n].Len = (ush)bits;
+ /* We overwrite tree[n].Dad which is no longer needed */
+
+ if (n > max_code) continue; /* not a leaf node */
+
+ bl_count[bits]++;
+ xbits = 0;
+ if (n >= base) xbits = extra[n-base];
+ f = tree[n].Freq;
+ opt_len += (ulg)f * (bits + xbits);
+ if (stree) static_len += (ulg)f * (stree[n].Len + xbits);
+ }
+ if (overflow == 0) return;
+
+ Trace((stderr,"\nbit length overflow\n"));
+ /* This happens for example on obj2 and pic of the Calgary corpus */
+
+ /* Find the first bit length which could increase: */
+ do {
+ bits = max_length-1;
+ while (bl_count[bits] == 0) bits--;
+ bl_count[bits]--; /* move one leaf down the tree */
+ bl_count[bits+1] += 2; /* move one overflow item as its brother */
+ bl_count[max_length]--;
+ /* The brother of the overflow item also moves one step up,
+ * but this does not affect bl_count[max_length]
+ */
+ overflow -= 2;
+ } while (overflow > 0);
+
+ /* Now recompute all bit lengths, scanning in increasing frequency.
+ * h is still equal to HEAP_SIZE. (It is simpler to reconstruct all
+ * lengths instead of fixing only the wrong ones. This idea is taken
+ * from 'ar' written by Haruhiko Okumura.)
+ */
+ for (bits = max_length; bits != 0; bits--) {
+ n = bl_count[bits];
+ while (n != 0) {
+ m = heap[--h];
+ if (m > max_code) continue;
+ if (tree[m].Len != (unsigned) bits) {
+ Trace((stderr,"code %d bits %d->%d\n", m, tree[m].Len, bits));
+ opt_len += ((long)bits-(long)tree[m].Len)*(long)tree[m].Freq;
+ tree[m].Len = (ush)bits;
+ }
+ n--;
+ }
+ }
+}
+
+/* ===========================================================================
+ * Generate the codes for a given tree and bit counts (which need not be
+ * optimal).
+ * IN assertion: the array bl_count contains the bit length statistics for
+ * the given tree and the field len is set for all tree elements.
+ * OUT assertion: the field code is set for all tree elements of non
+ * zero code length.
+ */
+static void gen_codes (ct_data *tree, /* the tree to decorate */
+ int max_code) /* largest code with non zero frequency */
+{
+ ush next_code[MAX_BITS+1]; /* next code value for each bit length */
+ ush code = 0; /* running code value */
+ int bits; /* bit index */
+ int n; /* code index */
+
+ /* The distribution counts are first used to generate the code values
+ * without bit reversal.
+ */
+ for (bits = 1; bits <= MAX_BITS; bits++) {
+ next_code[bits] = code = (code + bl_count[bits-1]) << 1;
+ }
+ /* Check that the bit counts in bl_count are consistent. The last code
+ * must be all ones.
+ */
+ Assert (code + bl_count[MAX_BITS]-1 == (1<<MAX_BITS)-1,
+ "inconsistent bit counts");
+ Tracev((stderr,"\ngen_codes: max_code %d ", max_code));
+
+ for (n = 0; n <= max_code; n++) {
+ int len = tree[n].Len;
+ if (len == 0) continue;
+ /* Now reverse the bits */
+ tree[n].Code = bi_reverse(next_code[len]++, len);
+
+ Tracec(tree != static_ltree, (stderr,"\nn %3d %c l %2d c %4x (%x) ",
+ n, (isgraph(n) ? n : ' '), len, tree[n].Code, next_code[len]-1));
+ }
+}
+
+/* ===========================================================================
+ * Construct one Huffman tree and assigns the code bit strings and lengths.
+ * Update the total bit length for the current block.
+ * IN assertion: the field freq is set for all tree elements.
+ * OUT assertions: the fields len and code are set to the optimal bit length
+ * and corresponding code. The length opt_len is updated; static_len is
+ * also updated if stree is not null. The field max_code is set.
+ */
+static void build_tree(tree_desc *desc)
+{
+ ct_data *tree = desc->dyn_tree;
+ ct_data *stree = desc->static_tree;
+ int elems = desc->elems;
+ int n, m; /* iterate over heap elements */
+ int max_code = -1; /* largest code with non zero frequency */
+ int node = elems; /* next internal node of the tree */
+
+ /* Construct the initial heap, with least frequent element in
+ * heap[SMALLEST]. The sons of heap[n] are heap[2*n] and heap[2*n+1].
+ * heap[0] is not used.
+ */
+ heap_len = 0, heap_max = HEAP_SIZE;
+
+ for (n = 0; n < elems; n++) {
+ if (tree[n].Freq != 0) {
+ heap[++heap_len] = max_code = n;
+ depth[n] = 0;
+ } else {
+ tree[n].Len = 0;
+ }
+ }
+
+ /* The pkzip format requires that at least one distance code exists,
+ * and that at least one bit should be sent even if there is only one
+ * possible code. So to avoid special checks later on we force at least
+ * two codes of non zero frequency.
+ */
+ while (heap_len < 2) {
+ int new = heap[++heap_len] = (max_code < 2 ? ++max_code : 0);
+ tree[new].Freq = 1;
+ depth[new] = 0;
+ opt_len--; if (stree) static_len -= stree[new].Len;
+ /* new is 0 or 1 so it does not have extra bits */
+ }
+ desc->max_code = max_code;
+
+ /* The elements heap[heap_len/2+1 .. heap_len] are leaves of the tree,
+ * establish sub-heaps of increasing lengths:
+ */
+ for (n = heap_len/2; n >= 1; n--) pqdownheap(tree, n);
+
+ /* Construct the Huffman tree by repeatedly combining the least two
+ * frequent nodes.
+ */
+ do {
+ pqremove(tree, n); /* n = node of least frequency */
+ m = heap[SMALLEST]; /* m = node of next least frequency */
+
+ heap[--heap_max] = n; /* keep the nodes sorted by frequency */
+ heap[--heap_max] = m;
+
+ /* Create a new node father of n and m */
+ tree[node].Freq = tree[n].Freq + tree[m].Freq;
+ depth[node] = (uch) (MAX(depth[n], depth[m]) + 1);
+ tree[n].Dad = tree[m].Dad = (ush)node;
+#ifdef DUMP_BL_TREE
+ if (tree == bl_tree) {
+ fprintf(stderr,"\nnode %d(%d), sons %d(%d) %d(%d)",
+ node, tree[node].Freq, n, tree[n].Freq, m, tree[m].Freq);
+ }
+#endif
+ /* and insert the new node in the heap */
+ heap[SMALLEST] = node++;
+ pqdownheap(tree, SMALLEST);
+
+ } while (heap_len >= 2);
+
+ heap[--heap_max] = heap[SMALLEST];
+
+ /* At this point, the fields freq and dad are set. We can now
+ * generate the bit lengths.
+ */
+ gen_bitlen((tree_desc *)desc);
+
+ /* The field len is now set, we can generate the bit codes */
+ gen_codes ((ct_data *)tree, max_code);
+}
+
+/* ===========================================================================
+ * Scan a literal or distance tree to determine the frequencies of the codes
+ * in the bit length tree. Updates opt_len to take into account the repeat
+ * counts. (The contribution of the bit length codes will be added later
+ * during the construction of bl_tree.)
+ */
+static void scan_tree (ct_data *tree, /* the tree to be scanned */
+ int max_code) /* and its largest code of non zero frequency */
+{
+ int n; /* iterates over all tree elements */
+ int prevlen = -1; /* last emitted length */
+ int curlen; /* length of current code */
+ int nextlen = tree[0].Len; /* length of next code */
+ int count = 0; /* repeat count of the current code */
+ int max_count = 7; /* max repeat count */
+ int min_count = 4; /* min repeat count */
+
+ if (nextlen == 0) max_count = 138, min_count = 3;
+ tree[max_code+1].Len = (ush)0xffff; /* guard */
+
+ for (n = 0; n <= max_code; n++) {
+ curlen = nextlen; nextlen = tree[n+1].Len;
+ if (++count < max_count && curlen == nextlen) {
+ continue;
+ } else if (count < min_count) {
+ bl_tree[curlen].Freq += count;
+ } else if (curlen != 0) {
+ if (curlen != prevlen) bl_tree[curlen].Freq++;
+ bl_tree[REP_3_6].Freq++;
+ } else if (count <= 10) {
+ bl_tree[REPZ_3_10].Freq++;
+ } else {
+ bl_tree[REPZ_11_138].Freq++;
+ }
+ count = 0; prevlen = curlen;
+ if (nextlen == 0) {
+ max_count = 138, min_count = 3;
+ } else if (curlen == nextlen) {
+ max_count = 6, min_count = 3;
+ } else {
+ max_count = 7, min_count = 4;
+ }
+ }
+}
+
+/* ===========================================================================
+ * Send a literal or distance tree in compressed form, using the codes in
+ * bl_tree.
+ */
+static void send_tree (ct_data *tree, /* the tree to be scanned */
+ int max_code) /* and its largest code of non zero frequency */
+{
+ int n; /* iterates over all tree elements */
+ int prevlen = -1; /* last emitted length */
+ int curlen; /* length of current code */
+ int nextlen = tree[0].Len; /* length of next code */
+ int count = 0; /* repeat count of the current code */
+ int max_count = 7; /* max repeat count */
+ int min_count = 4; /* min repeat count */
+
+ /* tree[max_code+1].Len = -1; */ /* guard already set */
+ if (nextlen == 0) max_count = 138, min_count = 3;
+
+ for (n = 0; n <= max_code; n++) {
+ curlen = nextlen; nextlen = tree[n+1].Len;
+ if (++count < max_count && curlen == nextlen) {
+ continue;
+ } else if (count < min_count) {
+ do { send_code(curlen, bl_tree); } while (--count != 0);
+
+ } else if (curlen != 0) {
+ if (curlen != prevlen) {
+ send_code(curlen, bl_tree); count--;
+ }
+ Assert(count >= 3 && count <= 6, " 3_6?");
+ send_code(REP_3_6, bl_tree); send_bits(count-3, 2);
+
+ } else if (count <= 10) {
+ send_code(REPZ_3_10, bl_tree); send_bits(count-3, 3);
+
+ } else {
+ send_code(REPZ_11_138, bl_tree); send_bits(count-11, 7);
+ }
+ count = 0; prevlen = curlen;
+ if (nextlen == 0) {
+ max_count = 138, min_count = 3;
+ } else if (curlen == nextlen) {
+ max_count = 6, min_count = 3;
+ } else {
+ max_count = 7, min_count = 4;
+ }
+ }
+}
+
+/* ===========================================================================
+ * Construct the Huffman tree for the bit lengths and return the index in
+ * bl_order of the last bit length code to send.
+ */
+static int build_bl_tree(void)
+{
+ int max_blindex; /* index of last bit length code of non zero freq */
+
+ /* Determine the bit length frequencies for literal and distance trees */
+ scan_tree((ct_data *)dyn_ltree, l_desc.max_code);
+ scan_tree((ct_data *)dyn_dtree, d_desc.max_code);
+
+ /* Build the bit length tree: */
+ build_tree((tree_desc *)(&bl_desc));
+ /* opt_len now includes the length of the tree representations, except
+ * the lengths of the bit lengths codes and the 5+5+4 bits for the counts.
+ */
+
+ /* Determine the number of bit length codes to send. The pkzip format
+ * requires that at least 4 bit length codes be sent. (appnote.txt says
+ * 3 but the actual value used is 4.)
+ */
+ for (max_blindex = BL_CODES-1; max_blindex >= 3; max_blindex--) {
+ if (bl_tree[bl_order[max_blindex]].Len != 0) break;
+ }
+ /* Update opt_len to include the bit length tree and counts */
+ opt_len += 3*(max_blindex+1) + 5+5+4;
+ Tracev((stderr, "\ndyn trees: dyn %lu, stat %lu", opt_len, static_len));
+
+ return max_blindex;
+}
+
+/* ===========================================================================
+ * Send the header for a block using dynamic Huffman trees: the counts, the
+ * lengths of the bit length codes, the literal tree and the distance tree.
+ * IN assertion: lcodes >= 257, dcodes >= 1, blcodes >= 4.
+ */
+static void send_all_trees(int lcodes, int dcodes, int blcodes)
+{
+ int rank; /* index in bl_order */
+
+ Assert (lcodes >= 257 && dcodes >= 1 && blcodes >= 4, "not enough codes");
+ Assert (lcodes <= L_CODES && dcodes <= D_CODES && blcodes <= BL_CODES,
+ "too many codes");
+ Tracev((stderr, "\nbl counts: "));
+ send_bits(lcodes-257, 5); /* not +255 as stated in appnote.txt */
+ send_bits(dcodes-1, 5);
+ send_bits(blcodes-4, 4); /* not -3 as stated in appnote.txt */
+ for (rank = 0; rank < blcodes; rank++) {
+ Tracev((stderr, "\nbl code %2d ", bl_order[rank]));
+ send_bits(bl_tree[bl_order[rank]].Len, 3);
+ }
+
+ send_tree((ct_data *)dyn_ltree, lcodes-1); /* send the literal tree */
+
+ send_tree((ct_data *)dyn_dtree, dcodes-1); /* send the distance tree */
+}
+
+/* ===========================================================================
+ * Determine the best encoding for the current block: dynamic trees, static
+ * trees or store, and output the encoded block to the zip file. This function
+ * returns the total compressed length for the file so far.
+ */
+void flush_block(char *buf, /* input block, or NULL if too old */
+ ulg stored_len, /* length of input block */
+ int pad, /* pad output to byte boundary */
+ int eof) /* true if this is the last block for a file */
+{
+ ulg opt_lenb, static_lenb; /* opt_len and static_len in bytes */
+ int max_blindex; /* index of last bit length code of non zero freq */
+
+ flag_buf[last_flags] = flags; /* Save the flags for the last 8 items */
+
+ /* Construct the literal and distance trees */
+ build_tree((tree_desc *)(&l_desc));
+ Tracev((stderr, "\nlit data: dyn %lu, stat %lu", opt_len, static_len));
+
+ build_tree((tree_desc *)(&d_desc));
+ Tracev((stderr, "\ndist data: dyn %lu, stat %lu", opt_len, static_len));
+ /* At this point, opt_len and static_len are the total bit lengths of
+ * the compressed block data, excluding the tree representations.
+ */
+
+ /* Build the bit length tree for the above two trees, and get the index
+ * in bl_order of the last bit length code to send.
+ */
+ max_blindex = build_bl_tree();
+
+ /* Determine the best encoding. Compute first the block length in bytes */
+ opt_lenb = (opt_len+3+7)>>3;
+ static_lenb = (static_len+3+7)>>3;
+
+ Trace((stderr, "\nopt %lu(%lu) stat %lu(%lu) stored %lu lit %u dist %u ",
+ opt_lenb, opt_len, static_lenb, static_len, stored_len,
+ last_lit, last_dist));
+
+ if (static_lenb <= opt_lenb) opt_lenb = static_lenb;
+
+ if (stored_len+4 <= opt_lenb && buf != (char*)0) {
+ /* 4: two words for the lengths */
+ /* The test buf != NULL is only necessary if LIT_BUFSIZE > WSIZE.
+ * Otherwise we can't have processed more than WSIZE input bytes since
+ * the last block flush, because compression would have been
+ * successful. If LIT_BUFSIZE <= WSIZE, it is never too late to
+ * transform a block into a stored block.
+ */
+ send_bits((STORED_BLOCK<<1)+eof, 3); /* send block type */
+ compressed_len = (compressed_len + 3 + 7) & ~7L;
+ compressed_len += (stored_len + 4) << 3;
+
+ copy_block(buf, (unsigned)stored_len, 1); /* with header */
+
+ } else if (static_lenb == opt_lenb) {
+ send_bits((STATIC_TREES<<1)+eof, 3);
+ compress_block((ct_data *)static_ltree, (ct_data *)static_dtree);
+ compressed_len += 3 + static_len;
+ } else {
+ send_bits((DYN_TREES<<1)+eof, 3);
+ send_all_trees(l_desc.max_code+1, d_desc.max_code+1, max_blindex+1);
+ compress_block((ct_data *)dyn_ltree, (ct_data *)dyn_dtree);
+ compressed_len += 3 + opt_len;
+ }
+ Assert (compressed_len == bits_sent, "bad compressed size");
+ init_block();
+
+ if (eof) {
+ /* Assert (input_len == bytes_in, "bad input size"); */
+ bi_windup();
+ compressed_len += 7; /* align on byte boundary */
+ } else if (pad && (compressed_len % 8) != 0) {
+ send_bits((STORED_BLOCK<<1)+eof, 3); /* send block type */
+ compressed_len = (compressed_len + 3 + 7) & ~7L;
+ copy_block(buf, 0, 1); /* with header */
+ }
+}
+
+/* ===========================================================================
+ * Save the match info and tally the frequency counts. Return true if
+ * the current block must be flushed.
+ */
+int ct_tally (int pack_level, /* Compression level, 1 to 9 */
+ int dist, /* distance of matched string */
+ int lc) /* match length-MIN_MATCH or unmatched char (if dist==0) */
+{
+ l_buf[last_lit++] = (uch)lc;
+ if (dist == 0) {
+ /* lc is the unmatched char */
+ dyn_ltree[lc].Freq++;
+ } else {
+ /* Here, lc is the match length - MIN_MATCH */
+ dist--; /* dist = match distance - 1 */
+ Assert((ush)dist < (ush)MAX_DIST &&
+ (ush)lc <= (ush)(MAX_MATCH-MIN_MATCH) &&
+ (ush)d_code(dist) < (ush)D_CODES, "ct_tally: bad match");
+
+ dyn_ltree[length_code[lc]+LITERALS+1].Freq++;
+ dyn_dtree[d_code(dist)].Freq++;
+
+ d_buf[last_dist++] = (ush)dist;
+ flags |= flag_bit;
+ }
+ flag_bit <<= 1;
+
+ /* Output the flags if they fill a byte: */
+ if ((last_lit & 7) == 0) {
+ flag_buf[last_flags++] = flags;
+ flags = 0, flag_bit = 1;
+ }
+ /* Try to guess if it is profitable to stop the current block here */
+ if (pack_level > 2 && (last_lit & 0xfff) == 0) {
+ /* Compute an upper bound for the compressed length */
+ ulg out_length = (ulg)last_lit*8L;
+ ulg in_length = (ulg)strstart-block_start;
+ int dcode;
+ for (dcode = 0; dcode < D_CODES; dcode++) {
+ out_length += (ulg)dyn_dtree[dcode].Freq*(5L+extra_dbits[dcode]);
+ }
+ out_length >>= 3;
+ Trace((stderr,"\nlast_lit %u, last_dist %u, in %ld, out ~%ld(%ld%%) ",
+ last_lit, last_dist, in_length, out_length,
+ 100L - out_length*100L/in_length));
+ if (last_dist < last_lit/2 && out_length < in_length/2) return 1;
+ }
+ return (last_lit == LIT_BUFSIZE-1 || last_dist == DIST_BUFSIZE);
+ /* We avoid equality with LIT_BUFSIZE because of wraparound at 64K
+ * on 16 bit machines and because stored blocks are restricted to
+ * 64K-1 bytes.
+ */
+}
+
+/* ===========================================================================
+ * Send the block data compressed using the given Huffman trees
+ */
+static void compress_block(ct_data *ltree, /* literal tree */
+ ct_data *dtree) /* distance tree */
+{
+ unsigned dist; /* distance of matched string */
+ int lc; /* match length or unmatched char (if dist == 0) */
+ unsigned lx = 0; /* running index in l_buf */
+ unsigned dx = 0; /* running index in d_buf */
+ unsigned fx = 0; /* running index in flag_buf */
+ uch flag = 0; /* current flags */
+ unsigned code; /* the code to send */
+ int extra; /* number of extra bits to send */
+
+ if (last_lit != 0) do {
+ if ((lx & 7) == 0) flag = flag_buf[fx++];
+ lc = l_buf[lx++];
+ if ((flag & 1) == 0) {
+ send_code(lc, ltree); /* send a literal byte */
+ Tracecv(isgraph(lc), (stderr," '%c' ", lc));
+ } else {
+ /* Here, lc is the match length - MIN_MATCH */
+ code = length_code[lc];
+ send_code(code+LITERALS+1, ltree); /* send the length code */
+ extra = extra_lbits[code];
+ if (extra != 0) {
+ lc -= base_length[code];
+ send_bits(lc, extra); /* send the extra length bits */
+ }
+ dist = d_buf[dx++];
+ /* Here, dist is the match distance - 1 */
+ code = d_code(dist);
+ Assert (code < D_CODES, "bad d_code");
+
+ send_code(code, dtree); /* send the distance code */
+ extra = extra_dbits[code];
+ if (extra != 0) {
+ dist -= base_dist[code];
+ send_bits(dist, extra); /* send the extra distance bits */
+ }
+ } /* literal or match pair ? */
+ flag >>= 1;
+ } while (lx < last_lit);
+
+ send_code(END_BLOCK, ltree);
+}
--- /dev/null
+/* util.c -- utility functions for gzip support
+
+ Copyright (C) 1997, 1998, 1999, 2001, 2002, 2006 Free Software
+ Foundation, Inc.
+ Copyright (C) 1992-1993 Jean-loup Gailly
+ Copyright (C) 2008 Josh Triplett
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
+ any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "gzip.h"
+
+static int write_buffer(int, void *, unsigned int);
+
+extern ulg crc_32_tab[]; /* crc table, defined below */
+
+/* ===========================================================================
+ * Run a set of bytes through the crc shift register. If s is a NULL
+ * pointer, then initialize the crc shift register contents instead.
+ * Return the current crc in either case.
+ */
+ulg updcrc(uch *s, unsigned n)
+{
+ register ulg c; /* temporary variable */
+
+ static ulg crc = (ulg)0xffffffffL; /* shift register contents */
+
+ if (s == NULL) {
+ c = 0xffffffffL;
+ } else {
+ c = crc;
+ if (n) do {
+ c = crc_32_tab[((int)c ^ (*s++)) & 0xff] ^ (c >> 8);
+ } while (--n);
+ }
+ crc = c;
+ return c ^ 0xffffffffL; /* (instead of ~c for 64-bit machines) */
+}
+
+/* Like the standard read function, except do not attempt to read more
+ than SSIZE_MAX bytes at a time. */
+int
+read_buffer (int fd, void *buf, unsigned int cnt)
+{
+#ifdef SSIZE_MAX
+ if (SSIZE_MAX < cnt)
+ cnt = (unsigned int)SSIZE_MAX;
+#endif
+ return read (fd, buf, cnt);
+}
+
+/* Likewise for 'write'. */
+static int
+write_buffer (int fd, void *buf, unsigned int cnt)
+{
+#ifdef SSIZE_MAX
+ if (SSIZE_MAX < cnt)
+ cnt = (unsigned int)SSIZE_MAX;
+#endif
+ return write (fd, buf, cnt);
+}
+
+/* ===========================================================================
+ * Does the same as write(), but also handles partial pipe writes and checks
+ * for error return.
+ */
+void write_buf(int fd, void *buf, unsigned cnt)
+{
+ unsigned n;
+
+ while ((n = write_buffer (fd, buf, cnt)) != cnt) {
+ if (n == (unsigned)(-1)) {
+ write_error();
+ }
+ cnt -= n;
+ buf = ((char*)buf)+n;
+ }
+}
+
+/* ========================================================================
+ * Error handlers.
+ */
+void
+gzip_error (char *m)
+{
+ fprintf (stderr, "\nzgz: stdin: %s\n", m);
+ exit(ERROR);
+}
+
+void read_error(void)
+{
+ if (errno != 0)
+ perror("\nzgz: stdin");
+ else
+ fprintf(stderr, "\nzgz: stdin: unexpected end of file\n");
+ exit(ERROR);
+}
+
+void write_error(void)
+{
+ perror("\nzgz: stdout");
+ exit(ERROR);
+}
+
+/* ========================================================================
+ * Table of CRC-32's of all single-byte values (made by makecrc.c)
+ */
+ulg crc_32_tab[] = {
+ 0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L,
+ 0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L,
+ 0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L,
+ 0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL,
+ 0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L,
+ 0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L,
+ 0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L,
+ 0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,
+ 0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L,
+ 0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL,
+ 0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L,
+ 0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L,
+ 0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L,
+ 0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL,
+ 0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL,
+ 0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L,
+ 0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL,
+ 0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L,
+ 0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L,
+ 0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L,
+ 0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL,
+ 0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L,
+ 0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L,
+ 0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,
+ 0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L,
+ 0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L,
+ 0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L,
+ 0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L,
+ 0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L,
+ 0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL,
+ 0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL,
+ 0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,
+ 0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L,
+ 0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL,
+ 0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL,
+ 0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L,
+ 0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL,
+ 0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L,
+ 0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL,
+ 0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L,
+ 0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL,
+ 0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L,
+ 0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L,
+ 0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL,
+ 0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L,
+ 0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L,
+ 0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L,
+ 0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,
+ 0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L,
+ 0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L,
+ 0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL,
+ 0x2d02ef8dL
+};
--- /dev/null
+
+/*-------------------------------------------------------------*/
+/*--- Block sorting machinery ---*/
+/*--- blocksort.c ---*/
+/*-------------------------------------------------------------*/
+
+/*--
+ This file is a part of bzip2 and/or libbzip2, a program and
+ library for lossless, block-sorting data compression.
+
+ Copyright (C) 1996-1999 Julian R Seward. All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+
+ 1. Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+
+ 2. The origin of this software must not be misrepresented; you must
+ not claim that you wrote the original software. If you use this
+ software in a product, an acknowledgment in the product
+ documentation would be appreciated but is not required.
+
+ 3. Altered source versions must be plainly marked as such, and must
+ not be misrepresented as being the original software.
+
+ 4. The name of the author may not be used to endorse or promote
+ products derived from this software without specific prior written
+ permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
+ OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ Julian Seward, Cambridge, UK.
+ jseward@acm.org
+ bzip2/libbzip2 version 0.9.5 of 24 May 1999
+
+ This program is based on (at least) the work of:
+ Mike Burrows
+ David Wheeler
+ Peter Fenwick
+ Alistair Moffat
+ Radford Neal
+ Ian H. Witten
+ Robert Sedgewick
+ Jon L. Bentley
+
+ For more information on these sources, see the manual.
+--*/
+
+
+#include "bzlib_private.h"
+
+/*---------------------------------------------*/
+/*--- Fallback O(N log(N)^2) sorting ---*/
+/*--- algorithm, for repetitive blocks ---*/
+/*---------------------------------------------*/
+
+/*---------------------------------------------*/
+static
+__inline__
+void fallbackSimpleSort ( UInt32* fmap,
+ UInt32* eclass,
+ Int32 lo,
+ Int32 hi )
+{
+ Int32 i, j, tmp;
+ UInt32 ec_tmp;
+
+ if (lo == hi) return;
+
+ if (hi - lo > 3) {
+ for ( i = hi-4; i >= lo; i-- ) {
+ tmp = fmap[i];
+ ec_tmp = eclass[tmp];
+ for ( j = i+4; j <= hi && ec_tmp > eclass[fmap[j]]; j += 4 )
+ fmap[j-4] = fmap[j];
+ fmap[j-4] = tmp;
+ }
+ }
+
+ for ( i = hi-1; i >= lo; i-- ) {
+ tmp = fmap[i];
+ ec_tmp = eclass[tmp];
+ for ( j = i+1; j <= hi && ec_tmp > eclass[fmap[j]]; j++ )
+ fmap[j-1] = fmap[j];
+ fmap[j-1] = tmp;
+ }
+}
+
+
+/*---------------------------------------------*/
+#define fswap(zz1, zz2) \
+ { Int32 zztmp = zz1; zz1 = zz2; zz2 = zztmp; }
+
+#define fvswap(zzp1, zzp2, zzn) \
+{ \
+ Int32 yyp1 = (zzp1); \
+ Int32 yyp2 = (zzp2); \
+ Int32 yyn = (zzn); \
+ while (yyn > 0) { \
+ fswap(fmap[yyp1], fmap[yyp2]); \
+ yyp1++; yyp2++; yyn--; \
+ } \
+}
+
+
+#define fmin(a,b) ((a) < (b)) ? (a) : (b)
+
+#define fpush(lz,hz) { stackLo[sp] = lz; \
+ stackHi[sp] = hz; \
+ sp++; }
+
+#define fpop(lz,hz) { sp--; \
+ lz = stackLo[sp]; \
+ hz = stackHi[sp]; }
+
+#define FALLBACK_QSORT_SMALL_THRESH 10
+#define FALLBACK_QSORT_STACK_SIZE 100
+
+
+static
+void fallbackQSort3 ( UInt32* fmap,
+ UInt32* eclass,
+ Int32 loSt,
+ Int32 hiSt )
+{
+ Int32 unLo, unHi, ltLo, gtHi, n, m;
+ Int32 sp, lo, hi;
+ UInt32 med, r, r3;
+ Int32 stackLo[FALLBACK_QSORT_STACK_SIZE];
+ Int32 stackHi[FALLBACK_QSORT_STACK_SIZE];
+
+ r = 0;
+
+ sp = 0;
+ fpush ( loSt, hiSt );
+
+ while (sp > 0) {
+
+ AssertH ( sp < FALLBACK_QSORT_STACK_SIZE, 1004 );
+
+ fpop ( lo, hi );
+ if (hi - lo < FALLBACK_QSORT_SMALL_THRESH) {
+ fallbackSimpleSort ( fmap, eclass, lo, hi );
+ continue;
+ }
+
+ /* Random partitioning. Median of 3 sometimes fails to
+ avoid bad cases. Median of 9 seems to help but
+ looks rather expensive. This too seems to work but
+ is cheaper. Guidance for the magic constants
+ 7621 and 32768 is taken from Sedgewick's algorithms
+ book, chapter 35.
+ */
+ r = ((r * 7621) + 1) % 32768;
+ r3 = r % 3;
+ if (r3 == 0) med = eclass[fmap[lo]]; else
+ if (r3 == 1) med = eclass[fmap[(lo+hi)>>1]]; else
+ med = eclass[fmap[hi]];
+
+ unLo = ltLo = lo;
+ unHi = gtHi = hi;
+
+ while (1) {
+ while (1) {
+ if (unLo > unHi) break;
+ n = (Int32)eclass[fmap[unLo]] - (Int32)med;
+ if (n == 0) {
+ fswap(fmap[unLo], fmap[ltLo]);
+ ltLo++; unLo++;
+ continue;
+ };
+ if (n > 0) break;
+ unLo++;
+ }
+ while (1) {
+ if (unLo > unHi) break;
+ n = (Int32)eclass[fmap[unHi]] - (Int32)med;
+ if (n == 0) {
+ fswap(fmap[unHi], fmap[gtHi]);
+ gtHi--; unHi--;
+ continue;
+ };
+ if (n < 0) break;
+ unHi--;
+ }
+ if (unLo > unHi) break;
+ fswap(fmap[unLo], fmap[unHi]); unLo++; unHi--;
+ }
+
+ AssertD ( unHi == unLo-1, "fallbackQSort3(2)" );
+
+ if (gtHi < ltLo) continue;
+
+ n = fmin(ltLo-lo, unLo-ltLo); fvswap(lo, unLo-n, n);
+ m = fmin(hi-gtHi, gtHi-unHi); fvswap(unLo, hi-m+1, m);
+
+ n = lo + unLo - ltLo - 1;
+ m = hi - (gtHi - unHi) + 1;
+
+ if (n - lo > hi - m) {
+ fpush ( lo, n );
+ fpush ( m, hi );
+ } else {
+ fpush ( m, hi );
+ fpush ( lo, n );
+ }
+ }
+}
+
+#undef fmin
+#undef fpush
+#undef fpop
+#undef fswap
+#undef fvswap
+#undef FALLBACK_QSORT_SMALL_THRESH
+#undef FALLBACK_QSORT_STACK_SIZE
+
+
+/*---------------------------------------------*/
+/* Pre:
+ nblock > 0
+ eclass exists for [0 .. nblock-1]
+ ((UInt16*)eclass) [0 .. nblock-1] [15:8] holds block
+ ptr exists for [0 .. nblock-1]
+
+ Post:
+ ((UInt16*)eclass) [0 .. nblock-1] [15:8] holds block
+ All other areas of eclass destroyed
+ fmap [0 .. nblock-1] holds sorted order
+ bhtab [ 0 .. 2+(nblock/32) ] destroyed
+*/
+
+#define SET_BH(zz) bhtab[(zz) >> 5] |= (1 << ((zz) & 31))
+#define CLEAR_BH(zz) bhtab[(zz) >> 5] &= ~(1 << ((zz) & 31))
+#define ISSET_BH(zz) (bhtab[(zz) >> 5] & (1 << ((zz) & 31)))
+#define WORD_BH(zz) bhtab[(zz) >> 5]
+#define UNALIGNED_BH(zz) ((zz) & 0x01f)
+
+static
+void fallbackSort ( UInt32* fmap,
+ UInt32* eclass,
+ UInt32* bhtab,
+ Int32 nblock,
+ Int32 verb )
+{
+ Int32 ftab[257];
+ Int32 ftabCopy[256];
+ Int32 H, i, j, k, l, r, cc, cc1;
+ Int32 nNotDone;
+ Int32 nBhtab;
+ UInt16* eclass16 = (UInt16*)eclass;
+
+ /*--
+ Initial 1-char radix sort to generate
+ initial fmap and initial BH bits.
+ --*/
+ if (verb >= 4)
+ VPrintf0 ( " bucket sorting ...\n" );
+ for (i = 0; i < 257; i++) ftab[i] = 0;
+ for (i = 0; i < nblock; i++) ftab[eclass16[i] >> 8]++;
+ for (i = 0; i < 256; i++) ftabCopy[i] = ftab[i];
+ for (i = 1; i < 257; i++) ftab[i] += ftab[i-1];
+
+ for (i = 0; i < nblock; i++) {
+ j = eclass16[i] >> 8;
+ k = ftab[j] - 1;
+ ftab[j] = k;
+ fmap[k] = i;
+ }
+
+ nBhtab = 2 + (nblock / 32);
+ for (i = 0; i < nBhtab; i++) bhtab[i] = 0;
+ for (i = 0; i < 256; i++) SET_BH(ftab[i]);
+
+ /*--
+ Inductively refine the buckets. Kind-of an
+ "exponential radix sort" (!), inspired by the
+ Manber-Myers suffix array construction algorithm.
+ --*/
+
+ /*-- set sentinel bits for block-end detection --*/
+ for (i = 0; i < 32; i++) {
+ SET_BH(nblock + 2*i);
+ CLEAR_BH(nblock + 2*i + 1);
+ }
+
+ /*-- the log(N) loop --*/
+ H = 1;
+ while (1) {
+
+ if (verb >= 4)
+ VPrintf1 ( " depth %6d has ", H );
+
+ j = 0;
+ for (i = 0; i < nblock; i++) {
+ if (ISSET_BH(i)) j = i;
+ k = fmap[i] - H; if (k < 0) k += nblock;
+ eclass[k] = j;
+ }
+
+ nNotDone = 0;
+ r = -1;
+ while (1) {
+
+ /*-- find the next non-singleton bucket --*/
+ k = r + 1;
+ while (ISSET_BH(k) && UNALIGNED_BH(k)) k++;
+ if (ISSET_BH(k)) {
+ while (WORD_BH(k) == 0xffffffff) k += 32;
+ while (ISSET_BH(k)) k++;
+ }
+ l = k - 1;
+ if (l >= nblock) break;
+ while (!ISSET_BH(k) && UNALIGNED_BH(k)) k++;
+ if (!ISSET_BH(k)) {
+ while (WORD_BH(k) == 0x00000000) k += 32;
+ while (!ISSET_BH(k)) k++;
+ }
+ r = k - 1;
+ if (r >= nblock) break;
+
+ /*-- now [l, r] bracket current bucket --*/
+ if (r > l) {
+ nNotDone += (r - l + 1);
+ fallbackQSort3 ( fmap, eclass, l, r );
+
+ /*-- scan bucket and generate header bits-- */
+ cc = -1;
+ for (i = l; i <= r; i++) {
+ cc1 = eclass[fmap[i]];
+ if (cc != cc1) { SET_BH(i); cc = cc1; };
+ }
+ }
+ }
+
+ if (verb >= 4)
+ VPrintf1 ( "%6d unresolved strings\n", nNotDone );
+
+ H *= 2;
+ if (H > nblock || nNotDone == 0) break;
+ }
+
+ /*--
+ Reconstruct the original block in
+ eclass16 [0 .. nblock-1] [15:8], since the
+ previous phase destroyed it.
+ --*/
+ if (verb >= 4)
+ VPrintf0 ( " reconstructing block ...\n" );
+ j = 0;
+ for (i = 0; i < nblock; i++) {
+ while (ftabCopy[j] == 0) j++;
+ ftabCopy[j]--;
+ eclass16[fmap[i]] = j << 8;
+ }
+ AssertH ( j < 256, 1005 );
+}
+
+#undef SET_BH
+#undef CLEAR_BH
+#undef ISSET_BH
+#undef WORD_BH
+#undef UNALIGNED_BH
+
+
+/*---------------------------------------------*/
+/*--- The main, O(N^2 log(N)) sorting ---*/
+/*--- algorithm. Faster for "normal" ---*/
+/*--- non-repetitive blocks. ---*/
+/*---------------------------------------------*/
+
+/*---------------------------------------------*/
+static
+__inline__
+Bool mainGtU ( UInt32 i1,
+ UInt32 i2,
+ UInt16* block,
+ UInt16* quadrant,
+ UInt32 nblock,
+ Int32* budget )
+{
+ Int32 k;
+ UInt16 s1, s2;
+
+ AssertD ( i1 != i2, "mainGtU" );
+
+ s1 = block[i1]; s2 = block[i2];
+ if (s1 != s2) return (s1 > s2);
+ i1 += 2; i2 += 2;
+
+ s1 = block[i1]; s2 = block[i2];
+ if (s1 != s2) return (s1 > s2);
+ i1 += 2; i2 += 2;
+
+ s1 = block[i1]; s2 = block[i2];
+ if (s1 != s2) return (s1 > s2);
+ i1 += 2; i2 += 2;
+
+ s1 = block[i1]; s2 = block[i2];
+ if (s1 != s2) return (s1 > s2);
+ i1 += 2; i2 += 2;
+
+ s1 = block[i1]; s2 = block[i2];
+ if (s1 != s2) return (s1 > s2);
+ i1 += 2; i2 += 2;
+
+ s1 = block[i1]; s2 = block[i2];
+ if (s1 != s2) return (s1 > s2);
+ i1 += 2; i2 += 2;
+
+ k = nblock + 8;
+
+ do {
+
+ s1 = block[i1]; s2 = block[i2];
+ if (s1 != s2) return (s1 > s2);
+ s1 = quadrant[i1]; s2 = quadrant[i2];
+ if (s1 != s2) return (s1 > s2);
+ i1 += 2; i2 += 2;
+
+ s1 = block[i1]; s2 = block[i2];
+ if (s1 != s2) return (s1 > s2);
+ s1 = quadrant[i1]; s2 = quadrant[i2];
+ if (s1 != s2) return (s1 > s2);
+ i1 += 2; i2 += 2;
+
+ s1 = block[i1]; s2 = block[i2];
+ if (s1 != s2) return (s1 > s2);
+ s1 = quadrant[i1]; s2 = quadrant[i2];
+ if (s1 != s2) return (s1 > s2);
+ i1 += 2; i2 += 2;
+
+ s1 = block[i1]; s2 = block[i2];
+ if (s1 != s2) return (s1 > s2);
+ s1 = quadrant[i1]; s2 = quadrant[i2];
+ if (s1 != s2) return (s1 > s2);
+ i1 += 2; i2 += 2;
+
+ if (i1 >= nblock) i1 -= nblock;
+ if (i2 >= nblock) i2 -= nblock;
+
+ k -= 8;
+ (*budget)--;
+ }
+ while (k >= 0);
+
+ return False;
+}
+
+
+/*---------------------------------------------*/
+/*--
+ Knuth's increments seem to work better
+ than Incerpi-Sedgewick here. Possibly
+ because the number of elems to sort is
+ usually small, typically <= 20.
+--*/
+Int32 incs[14] = { 1, 4, 13, 40, 121, 364, 1093, 3280,
+ 9841, 29524, 88573, 265720,
+ 797161, 2391484 };
+
+static
+void mainSimpleSort ( UInt32* ptr,
+ UInt16* block,
+ UInt16* quadrant,
+ Int32 nblock,
+ Int32 lo,
+ Int32 hi,
+ Int32 d,
+ Int32* budget )
+{
+ Int32 i, j, h, bigN, hp;
+ UInt32 v;
+
+ bigN = hi - lo + 1;
+ if (bigN < 2) return;
+
+ hp = 0;
+ while (incs[hp] < bigN) hp++;
+ hp--;
+
+ for (; hp >= 0; hp--) {
+ h = incs[hp];
+
+ i = lo + h;
+ while (True) {
+
+ /*-- copy 1 --*/
+ if (i > hi) break;
+ v = ptr[i];
+ j = i;
+ while ( mainGtU (
+ ptr[j-h]+d, v+d, block, quadrant, nblock, budget
+ ) ) {
+ ptr[j] = ptr[j-h];
+ j = j - h;
+ if (j <= (lo + h - 1)) break;
+ }
+ ptr[j] = v;
+ i++;
+
+ /*-- copy 2 --*/
+ if (i > hi) break;
+ v = ptr[i];
+ j = i;
+ while ( mainGtU (
+ ptr[j-h]+d, v+d, block, quadrant, nblock, budget
+ ) ) {
+ ptr[j] = ptr[j-h];
+ j = j - h;
+ if (j <= (lo + h - 1)) break;
+ }
+ ptr[j] = v;
+ i++;
+
+ /*-- copy 3 --*/
+ if (i > hi) break;
+ v = ptr[i];
+ j = i;
+ while ( mainGtU (
+ ptr[j-h]+d, v+d, block, quadrant, nblock, budget
+ ) ) {
+ ptr[j] = ptr[j-h];
+ j = j - h;
+ if (j <= (lo + h - 1)) break;
+ }
+ ptr[j] = v;
+ i++;
+
+ if (*budget < 0) return;
+ }
+ }
+}
+
+
+/*---------------------------------------------*/
+/*--
+ The following is an implementation of
+ an elegant 3-way quicksort for strings,
+ described in a paper "Fast Algorithms for
+ Sorting and Searching Strings", by Robert
+ Sedgewick and Jon L. Bentley.
+--*/
+
+#define mswap(zz1, zz2) \
+ { Int32 zztmp = zz1; zz1 = zz2; zz2 = zztmp; }
+
+#define mvswap(zzp1, zzp2, zzn) \
+{ \
+ Int32 yyp1 = (zzp1); \
+ Int32 yyp2 = (zzp2); \
+ Int32 yyn = (zzn); \
+ while (yyn > 0) { \
+ mswap(ptr[yyp1], ptr[yyp2]); \
+ yyp1++; yyp2++; yyn--; \
+ } \
+}
+
+
+static
+__inline__
+UInt16 mmed3 ( UInt16 a, UInt16 b, UInt16 c )
+{
+ UInt16 t;
+ if (a > b) { t = a; a = b; b = t; };
+ if (b > c) { t = b; b = c; c = t; };
+ if (a > b) b = a;
+ return b;
+}
+
+
+#define mmin(a,b) ((a) < (b)) ? (a) : (b)
+
+#define mpush(lz,hz,dz) { stackLo[sp] = lz; \
+ stackHi[sp] = hz; \
+ stackD [sp] = dz; \
+ sp++; }
+
+#define mpop(lz,hz,dz) { sp--; \
+ lz = stackLo[sp]; \
+ hz = stackHi[sp]; \
+ dz = stackD [sp]; }
+
+
+#define mnextsize(az) (nextHi[az]-nextLo[az])
+
+#define mnextswap(az,bz) \
+ { Int32 tz; \
+ tz = nextLo[az]; nextLo[az] = nextLo[bz]; nextLo[bz] = tz; \
+ tz = nextHi[az]; nextHi[az] = nextHi[bz]; nextHi[bz] = tz; \
+ tz = nextD [az]; nextD [az] = nextD [bz]; nextD [bz] = tz; }
+
+
+#define MAIN_QSORT_SMALL_THRESH 20
+#define MAIN_QSORT_DEPTH_THRESH (BZ_N_RADIX + BZ_N_QSORT)
+#define MAIN_QSORT_STACK_SIZE 100
+
+static
+void mainQSort3 ( UInt32* ptr,
+ UInt16* block,
+ UInt16* quadrant,
+ Int32 nblock,
+ Int32 loSt,
+ Int32 hiSt,
+ Int32 dSt,
+ Int32* budget )
+{
+ Int32 unLo, unHi, ltLo, gtHi, n, m, med;
+ Int32 sp, lo, hi, d;
+
+ Int32 stackLo[MAIN_QSORT_STACK_SIZE];
+ Int32 stackHi[MAIN_QSORT_STACK_SIZE];
+ Int32 stackD [MAIN_QSORT_STACK_SIZE];
+
+ Int32 nextLo[3];
+ Int32 nextHi[3];
+ Int32 nextD [3];
+
+ sp = 0;
+ mpush ( loSt, hiSt, dSt );
+
+ while (sp > 0) {
+
+ AssertH ( sp < MAIN_QSORT_STACK_SIZE, 1001 );
+
+ mpop ( lo, hi, d );
+ if (hi - lo < MAIN_QSORT_SMALL_THRESH ||
+ d > MAIN_QSORT_DEPTH_THRESH) {
+ mainSimpleSort ( ptr, block, quadrant, nblock, lo, hi, d, budget );
+ if (*budget < 0) return;
+ continue;
+ }
+
+ med = (Int32)
+ mmed3 ( block[ptr[ lo ]+d],
+ block[ptr[ hi ]+d],
+ block[ptr[ (lo+hi)>>1 ]+d] );
+
+ unLo = ltLo = lo;
+ unHi = gtHi = hi;
+
+ while (True) {
+ while (True) {
+ if (unLo > unHi) break;
+ n = ((Int32)block[ptr[unLo]+d]) - med;
+ if (n == 0) {
+ mswap(ptr[unLo], ptr[ltLo]);
+ ltLo++; unLo++; continue;
+ };
+ if (n > 0) break;
+ unLo++;
+ }
+ while (True) {
+ if (unLo > unHi) break;
+ n = ((Int32)block[ptr[unHi]+d]) - med;
+ if (n == 0) {
+ mswap(ptr[unHi], ptr[gtHi]);
+ gtHi--; unHi--; continue;
+ };
+ if (n < 0) break;
+ unHi--;
+ }
+ if (unLo > unHi) break;
+ mswap(ptr[unLo], ptr[unHi]); unLo++; unHi--;
+ }
+
+ AssertD ( unHi == unLo-1, "mainQSort3(2)" );
+
+ if (gtHi < ltLo) {
+ mpush(lo, hi, d+2 );
+ continue;
+ }
+
+ n = mmin(ltLo-lo, unLo-ltLo); mvswap(lo, unLo-n, n);
+ m = mmin(hi-gtHi, gtHi-unHi); mvswap(unLo, hi-m+1, m);
+
+ n = lo + unLo - ltLo - 1;
+ m = hi - (gtHi - unHi) + 1;
+
+ nextLo[0] = lo; nextHi[0] = n; nextD[0] = d;
+ nextLo[1] = m; nextHi[1] = hi; nextD[1] = d;
+ nextLo[2] = n+1; nextHi[2] = m-1; nextD[2] = d+2;
+
+ if (mnextsize(0) < mnextsize(1)) mnextswap(0,1);
+ if (mnextsize(1) < mnextsize(2)) mnextswap(1,2);
+ if (mnextsize(0) < mnextsize(1)) mnextswap(0,1);
+
+ AssertD (mnextsize(0) >= mnextsize(1), "mainQSort3(8)" );
+ AssertD (mnextsize(1) >= mnextsize(2), "mainQSort3(9)" );
+
+ mpush (nextLo[0], nextHi[0], nextD[0]);
+ mpush (nextLo[1], nextHi[1], nextD[1]);
+ mpush (nextLo[2], nextHi[2], nextD[2]);
+ }
+}
+
+#undef mswap
+#undef mvswap
+#undef mpush
+#undef mpop
+#undef mmin
+#undef mnextsize
+#undef mnextswap
+#undef MAIN_QSORT_SMALL_THRESH
+#undef MAIN_QSORT_DEPTH_THRESH
+#undef MAIN_QSORT_STACK_SIZE
+
+
+/*---------------------------------------------*/
+/* Pre:
+ nblock > N_OVERSHOOT
+ block32 exists for [0 .. nblock-1 +N_OVERSHOOT]
+ ((UInt16*)block32) [0 .. nblock-1] [15:8] holds block
+ ptr exists for [0 .. nblock-1]
+
+ Post:
+ ((UInt16*)block32) [0 .. nblock-1] [15:8] holds block
+ All other areas of block32 destroyed
+ ftab [0 .. 65536 ] destroyed
+ ptr [0 .. nblock-1] holds sorted order
+ if (*budget < 0), sorting was abandoned
+*/
+
+#define BIGFREQ(b) (ftab[((b)+1) << 8] - ftab[(b) << 8])
+#define SETMASK (1 << 21)
+#define CLEARMASK (~(SETMASK))
+
+static
+void mainSort ( UInt32* ptr,
+ UInt16* block,
+ UInt16* quadrant,
+ UInt32* ftab,
+ Int32 nblock,
+ Int32 verb,
+ Int32* budget )
+{
+ Int32 i, j, k, m, ss, sb;
+ Int32 runningOrder[256];
+ Int32 copy[256];
+ Bool bigDone[256];
+ UChar c1;
+ Int32 numQSorted = 0;
+ UInt16 s;
+
+ if (verb >= 4) VPrintf0 ( " main sort initialise ...\n" );
+
+ /*-- Stripe the block data into 16 bits, and at the
+ same time set up the 2-byte frequency table
+ --*/
+ for (i = 65536; i >= 0; i--) ftab[i] = 0;
+
+ s = block[0];
+ for (i = 1; i < nblock; i++) {
+ quadrant[i] = 0;
+ s = (s << 8) | block[i];
+ block[i-1] = s;
+ ftab[s]++;
+ }
+ quadrant[0] = 0;
+ s = (s << 8) | (block[0] >> 8);
+ block[nblock-1] = s;
+ ftab[s]++;
+
+ /*-- (emphasises close relationship of block & quadrant) --*/
+ for (i = 0; i < BZ_N_OVERSHOOT; i++) {
+ block [nblock+i] = block[i];
+ quadrant[nblock+i] = 0;
+ }
+
+ if (verb >= 4) VPrintf0 ( " bucket sorting ...\n" );
+
+ /*-- Complete the initial radix sort --*/
+ for (i = 1; i <= 65536; i++) ftab[i] += ftab[i-1];
+
+ for (i = 0; i < nblock; i++) {
+ s = block[i];
+ j = ftab[s] - 1;
+ ftab[s] = j;
+ ptr[j] = i;
+ }
+
+ /*--
+ Now ftab contains the first loc of every small bucket.
+ Calculate the running order, from smallest to largest
+ big bucket.
+ --*/
+ for (i = 0; i <= 255; i++) {
+ bigDone [i] = False;
+ runningOrder[i] = i;
+ }
+
+ {
+ Int32 vv;
+ Int32 h = 1;
+ do h = 3 * h + 1; while (h <= 256);
+ do {
+ h = h / 3;
+ for (i = h; i <= 255; i++) {
+ vv = runningOrder[i];
+ j = i;
+ while ( BIGFREQ(runningOrder[j-h]) > BIGFREQ(vv) ) {
+ runningOrder[j] = runningOrder[j-h];
+ j = j - h;
+ if (j <= (h - 1)) goto zero;
+ }
+ zero:
+ runningOrder[j] = vv;
+ }
+ } while (h != 1);
+ }
+
+ /*--
+ The main sorting loop.
+ --*/
+
+ for (i = 0; i <= 255; i++) {
+
+ /*--
+ Process big buckets, starting with the least full.
+ Basically this is a 4-step process in which we call
+ mainQSort3 to sort the small buckets [ss, j], but
+ also make a big effort to avoid the calls if we can.
+ --*/
+ ss = runningOrder[i];
+
+ /*--
+ Step 1:
+ Complete the big bucket [ss] by quicksorting
+ any unsorted small buckets [ss, j], for j != ss.
+ Hopefully previous pointer-scanning phases have already
+ completed many of the small buckets [ss, j], so
+ we don't have to sort them at all.
+ --*/
+ for (j = 0; j <= 255; j++) {
+ if (j != ss) {
+ sb = (ss << 8) + j;
+ if ( ! (ftab[sb] & SETMASK) ) {
+ Int32 lo = ftab[sb] & CLEARMASK;
+ Int32 hi = (ftab[sb+1] & CLEARMASK) - 1;
+ if (hi > lo) {
+ if (verb >= 4)
+ VPrintf4 ( " qsort [0x%x, 0x%x] "
+ "done %d this %d\n",
+ ss, j, numQSorted, hi - lo + 1 );
+ mainQSort3 (
+ ptr, block, quadrant, nblock,
+ lo, hi, BZ_N_RADIX, budget
+ );
+ numQSorted += (hi - lo + 1);
+ if (*budget < 0) return;
+ }
+ }
+ ftab[sb] |= SETMASK;
+ }
+ }
+
+ /*--
+ Step 2:
+ Deal specially with case [ss, ss]. This establishes the
+ sorted order for [ss, ss] without any comparisons.
+ A clever trick, cryptically described as steps Q6b and Q6c
+ in SRC-124 (aka BW94). Compared to bzip2, this makes it
+ practical not to use a preliminary run-length coder.
+ --*/
+ {
+ Int32 put0, get0, put1, get1;
+ Int32 sbn = (ss << 8) + ss;
+ Int32 lo = ftab[sbn] & CLEARMASK;
+ Int32 hi = (ftab[sbn+1] & CLEARMASK) - 1;
+ UChar ssc = (UChar)ss;
+ put0 = lo;
+ get0 = ftab[ss << 8] & CLEARMASK;
+ put1 = hi;
+ get1 = (ftab[(ss+1) << 8] & CLEARMASK) - 1;
+ while (get0 < put0) {
+ j = ptr[get0]-1; if (j < 0) j += nblock;
+ c1 = (UChar)(block[j] >> 8);
+ if (c1 == ssc) { ptr[put0] = j; put0++; };
+ get0++;
+ }
+ while (get1 > put1) {
+ j = ptr[get1]-1; if (j < 0) j += nblock;
+ c1 = (UChar)(block[j] >> 8);
+ if (c1 == ssc) { ptr[put1] = j; put1--; };
+ get1--;
+ }
+ ftab[sbn] |= SETMASK;
+ }
+
+ /*--
+ Step 3:
+ The [ss] big bucket is now done. Record this fact,
+ and update the quadrant descriptors. Remember to
+ update quadrants in the overshoot area too, if
+ necessary. The "if (i < 255)" test merely skips
+ this updating for the last bucket processed, since
+ updating for the last bucket is pointless.
+
+ The quadrant array provides a way to incrementally
+ cache sort orderings, as they appear, so as to
+ make subsequent comparisons in fullGtU() complete
+ faster. For repetitive blocks this makes a big
+ difference (but not big enough to be able to avoid
+ the fallback sorting mechanism, exponential radix sort).
+
+ The precise meaning is: at all times:
+
+ for 0 <= i < nblock and 0 <= j <= nblock
+
+ if block[i] != block[j],
+
+ then the relative values of quadrant[i] and
+ quadrant[j] are meaningless.
+
+ else {
+ if quadrant[i] < quadrant[j]
+ then the string starting at i lexicographically
+ precedes the string starting at j
+
+ else if quadrant[i] > quadrant[j]
+ then the string starting at j lexicographically
+ precedes the string starting at i
+
+ else
+ the relative ordering of the strings starting
+ at i and j has not yet been determined.
+ }
+ --*/
+ bigDone[ss] = True;
+
+ if (i < 255) {
+ Int32 bbStart = ftab[ss << 8] & CLEARMASK;
+ Int32 bbSize = (ftab[(ss+1) << 8] & CLEARMASK) - bbStart;
+ Int32 shifts = 0;
+
+ while ((bbSize >> shifts) > 65534) shifts++;
+
+ for (j = 0; j < bbSize; j++) {
+ Int32 a2update = ptr[bbStart + j];
+ UInt16 qVal = (UInt16)(j >> shifts);
+ quadrant[a2update] = qVal;
+ if (a2update < BZ_N_OVERSHOOT)
+ quadrant[a2update + nblock] = qVal;
+ }
+ AssertH ( ((bbSize-1) >> shifts) <= 65535, 1002 );
+ }
+
+ /*--
+ Step 4:
+ Now scan this big bucket [ss] so as to synthesise the
+ sorted order for small buckets [t, ss] for all t != ss.
+ This will avoid doing Real Work in subsequent Step 1's.
+ --*/
+ for (j = 0; j <= 255; j++)
+ copy[j] = ftab[(j << 8) + ss] & CLEARMASK;
+
+ m = ftab[(ss+1) << 8] & CLEARMASK;
+ for (j = ftab[ss << 8] & CLEARMASK; j < m; j++) {
+ k = ptr[j] - 1; if (k < 0) k += nblock;
+ c1 = (UChar)(block[k] >> 8);
+ if ( ! bigDone[c1] ) {
+ ptr[copy[c1]] = k;
+ copy[c1] ++;
+ }
+ }
+
+ for (j = 0; j <= 255; j++) ftab[(j << 8) + ss] |= SETMASK;
+ }
+
+ if (verb >= 4)
+ VPrintf3 ( " %d pointers, %d sorted, %d scanned\n",
+ nblock, numQSorted, nblock - numQSorted );
+}
+
+#undef BIGFREQ
+#undef SETMASK
+#undef CLEARMASK
+
+
+/*---------------------------------------------*/
+/* Pre:
+ nblock > 0
+ arr2 exists for [0 .. nblock-1 +N_OVERSHOOT]
+ ((UInt16*)arr2) [0 .. nblock-1] [15:8] holds block
+ arr1 exists for [0 .. nblock-1]
+
+ Post:
+ ((UInt16*)arr2) [0 .. nblock-1] [15:8] holds block
+ All other areas of block destroyed
+ ftab [ 0 .. 65536 ] destroyed
+ arr1 [0 .. nblock-1] holds sorted order
+*/
+void blockSort ( EState* s )
+{
+ UInt32* ptr = s->ptr;
+ UInt16* block = s->block;
+ UInt32* ftab = s->ftab;
+ Int32 nblock = s->nblock;
+ Int32 verb = s->verbosity;
+ Int32 wfact = s->workFactor;
+ UInt16* quadrant;
+ Int32 budget;
+ Int32 budgetInit;
+ Int32 i;
+
+ if (nblock < 10000) {
+ for (i = 0; i < nblock; i++) block[i] <<= 8;
+ fallbackSort ( s->arr1, s->arr2, ftab, nblock, verb );
+ } else {
+ quadrant = &(block[nblock+BZ_N_OVERSHOOT]);
+
+ /* (wfact-1) / 3 puts the default-factor-30
+ transition point at very roughly the same place as
+ with v0.1 and v0.9.0.
+ Not that it particularly matters any more, since the
+ resulting compressed stream is now the same regardless
+ of whether or not we use the main sort or fallback sort.
+ */
+ if (wfact < 1 ) wfact = 1;
+ if (wfact > 100) wfact = 100;
+ budgetInit = nblock * ((wfact-1) / 3);
+ budget = budgetInit;
+
+ mainSort ( ptr, block, quadrant, ftab, nblock, verb, &budget );
+ if (verb >= 3)
+ VPrintf3 ( " %d work, %d block, ratio %5.2f\n",
+ budgetInit - budget,
+ nblock,
+ (float)(budgetInit - budget) /
+ (float)(nblock==0 ? 1 : nblock) );
+ if (budget < 0) {
+ if (verb >= 2)
+ VPrintf0 ( " too repetitive; using fallback"
+ " sorting algorithm\n" );
+ fallbackSort ( s->arr1, s->arr2, ftab, nblock, verb );
+ }
+ }
+
+ s->origPtr = -1;
+ for (i = 0; i < s->nblock; i++)
+ if (ptr[i] == 0)
+ { s->origPtr = i; break; };
+
+ AssertH( s->origPtr != -1, 1003 );
+}
+
+
+/*-------------------------------------------------------------*/
+/*--- end blocksort.c ---*/
+/*-------------------------------------------------------------*/
--- /dev/null
+/*--
+ This file is a part of bzip2 and/or libbzip2, a program and
+ library for lossless, block-sorting data compression.
+
+ Copyright (C) 1996-1999 Julian R Seward. All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+
+ 1. Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+
+ 2. The origin of this software must not be misrepresented; you must
+ not claim that you wrote the original software. If you use this
+ software in a product, an acknowledgment in the product
+ documentation would be appreciated but is not required.
+
+ 3. Altered source versions must be plainly marked as such, and must
+ not be misrepresented as being the original software.
+
+ 4. The name of the author may not be used to endorse or promote
+ products derived from this software without specific prior written
+ permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
+ OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ Julian Seward, Cambridge, UK.
+ jseward@acm.org
+ bzip2/libbzip2 version 0.9.5 of 24 May 1999
+
+ (Now heavily hacked to be part of zgz; decompression and
+ portability ripped out.)
+
+ This program is based on (at least) the work of:
+ Mike Burrows
+ David Wheeler
+ Peter Fenwick
+ Alistair Moffat
+ Radford Neal
+ Ian H. Witten
+ Robert Sedgewick
+ Jon L. Bentley
+
+ For more information on these sources, see the manual.
+--*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <signal.h>
+#include <math.h>
+#include <errno.h>
+#include <ctype.h>
+#include "bzlib.h"
+
+#define ERROR_IF_EOF(i) { if ((i) == EOF) ioError(); }
+#define ERROR_IF_NOT_ZERO(i) { if ((i) != 0) ioError(); }
+#define ERROR_IF_MINUS_ONE(i) { if ((i) == (-1)) ioError(); }
+
+#include <sys/types.h>
+#include <utime.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <sys/times.h>
+
+typedef char Char;
+typedef unsigned char Bool;
+typedef unsigned char UChar;
+typedef int Int32;
+typedef unsigned int UInt32;
+typedef short Int16;
+typedef unsigned short UInt16;
+
+#define True ((Bool)1)
+#define False ((Bool)0)
+
+/*--
+ IntNative is your platform's `native' int size.
+ Only here to avoid probs with 64-bit platforms.
+--*/
+typedef int IntNative;
+
+Int32 verbosity;
+Int32 blockSize100k;
+Int32 workFactor;
+
+Bool myfeof ( FILE* f )
+{
+ Int32 c = fgetc ( f );
+ if (c == EOF) return True;
+ ungetc ( c, f );
+ return False;
+}
+
+void panic (char *msg) {
+ perror("oops");
+ fprintf(stderr, "%s\n", msg);
+ exit(1);
+}
+
+void compressStream ( FILE *stream, FILE *zStream )
+{
+ BZFILE* bzf = NULL;
+ UChar ibuf[5000];
+ Int32 nIbuf;
+ UInt32 nbytes_in, nbytes_out;
+ Int32 bzerr, bzerr_dummy, ret;
+
+ if (ferror(stream)) goto errhandler_io;
+ if (ferror(zStream)) goto errhandler_io;
+
+ bzf = bzWriteOpen ( &bzerr, zStream,
+ blockSize100k, verbosity, workFactor );
+ if (bzerr != BZ_OK) goto errhandler;
+
+ if (verbosity >= 2) fprintf ( stderr, "\n" );
+
+ while (True) {
+
+ if (myfeof(stream)) break;
+ nIbuf = fread ( ibuf, sizeof(UChar), 5000, stream );
+ if (ferror(stream)) goto errhandler_io;
+ if (nIbuf > 0) bzWrite ( &bzerr, bzf, (void*)ibuf, nIbuf );
+ if (bzerr != BZ_OK) goto errhandler;
+
+ }
+
+ bzWriteClose ( &bzerr, bzf, 0, &nbytes_in, &nbytes_out );
+ if (bzerr != BZ_OK) goto errhandler;
+
+ if (ferror(zStream)) goto errhandler_io;
+ ret = fflush ( zStream );
+ if (ret == EOF) goto errhandler_io;
+ if (zStream != stdout) {
+ ret = fclose ( zStream );
+ if (ret == EOF) goto errhandler_io;
+ }
+ if (ferror(stream)) goto errhandler_io;
+ ret = fclose ( stream );
+ if (ret == EOF) goto errhandler_io;
+
+ if (nbytes_in == 0) nbytes_in = 1;
+
+ return;
+
+ errhandler:
+ bzWriteClose ( &bzerr_dummy, bzf, 1, &nbytes_in, &nbytes_out );
+ switch (bzerr) {
+ case BZ_MEM_ERROR:
+ panic ( "out of memory" );
+ case BZ_IO_ERROR:
+ errhandler_io:
+ panic ( "io error" );
+ default:
+ panic ( "compress:unexpected error" );
+ }
+
+ panic ( "compress:end" );
+ /*notreached*/
+}
+
+void old_bzip2(int level) {
+ workFactor = 30;
+ blockSize100k = level;
+
+ compressStream(stdin, stdout);
+}
--- /dev/null
+
+/*-------------------------------------------------------------*/
+/*--- Library top-level functions. ---*/
+/*--- bzlib.c ---*/
+/*-------------------------------------------------------------*/
+
+/*--
+ This file is a part of bzip2 and/or libbzip2, a program and
+ library for lossless, block-sorting data compression.
+
+ Copyright (C) 1996-1999 Julian R Seward. All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+
+ 1. Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+
+ 2. The origin of this software must not be misrepresented; you must
+ not claim that you wrote the original software. If you use this
+ software in a product, an acknowledgment in the product
+ documentation would be appreciated but is not required.
+
+ 3. Altered source versions must be plainly marked as such, and must
+ not be misrepresented as being the original software.
+
+ 4. The name of the author may not be used to endorse or promote
+ products derived from this software without specific prior written
+ permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
+ OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ Julian Seward, Cambridge, UK.
+ jseward@acm.org
+ bzip2/libbzip2 version 0.9.5 of 24 May 1999
+
+ This program is based on (at least) the work of:
+ Mike Burrows
+ David Wheeler
+ Peter Fenwick
+ Alistair Moffat
+ Radford Neal
+ Ian H. Witten
+ Robert Sedgewick
+ Jon L. Bentley
+
+ For more information on these sources, see the manual.
+--*/
+
+/*--
+ CHANGES
+ ~~~~~~~
+ 0.9.0 -- original version.
+
+ 0.9.0a/b -- no changes in this file.
+
+ 0.9.0c
+ * made zero-length BZ_FLUSH work correctly in bzCompress().
+ * fixed bzWrite/bzRead to ignore zero-length requests.
+ * fixed bzread to correctly handle read requests after EOF.
+ * wrong parameter order in call to bzDecompressInit in
+ bzBuffToBuffDecompress. Fixed.
+--*/
+
+#include "bzlib_private.h"
+
+void bz__AssertH__fail ( int errcode ) {
+ fprintf(stderr, "bzip2 compressor internal error\n");
+ exit(1);
+}
+
+/*---------------------------------------------------*/
+/*--- Compression stuff ---*/
+/*---------------------------------------------------*/
+
+/*---------------------------------------------------*/
+static
+void* default_bzalloc ( void* opaque, Int32 items, Int32 size )
+{
+ void* v = malloc ( items * size );
+ return v;
+}
+
+static
+void default_bzfree ( void* opaque, void* addr )
+{
+ if (addr != NULL) free ( addr );
+}
+
+
+/*---------------------------------------------------*/
+static
+void prepare_new_block ( EState* s )
+{
+ Int32 i;
+ s->nblock = 0;
+ s->numZ = 0;
+ s->state_out_pos = 0;
+ BZ_INITIALISE_CRC ( s->blockCRC );
+ for (i = 0; i < 256; i++) s->inUse[i] = False;
+ s->blockNo++;
+}
+
+
+/*---------------------------------------------------*/
+static
+void init_RL ( EState* s )
+{
+ s->state_in_ch = 256;
+ s->state_in_len = 0;
+}
+
+
+static
+Bool isempty_RL ( EState* s )
+{
+ if (s->state_in_ch < 256 && s->state_in_len > 0)
+ return False; else
+ return True;
+}
+
+
+/*---------------------------------------------------*/
+int BZ_API(bzCompressInit)
+ ( bz_stream* strm,
+ int blockSize100k,
+ int verbosity,
+ int workFactor )
+{
+ Int32 n;
+ EState* s;
+
+ if (strm == NULL ||
+ blockSize100k < 1 || blockSize100k > 9 ||
+ workFactor < 0 || workFactor > 250)
+ return BZ_PARAM_ERROR;
+
+ if (workFactor == 0) workFactor = 30;
+ if (strm->bzalloc == NULL) strm->bzalloc = default_bzalloc;
+ if (strm->bzfree == NULL) strm->bzfree = default_bzfree;
+
+ s = BZALLOC( sizeof(EState) );
+ if (s == NULL) return BZ_MEM_ERROR;
+ s->strm = strm;
+
+ s->arr1 = NULL;
+ s->arr2 = NULL;
+ s->ftab = NULL;
+
+ n = 100000 * blockSize100k;
+ s->arr1 = BZALLOC( n * sizeof(UInt32) );
+ s->arr2 = BZALLOC( (n+BZ_N_OVERSHOOT) * sizeof(UInt32) );
+ s->ftab = BZALLOC( 65537 * sizeof(UInt32) );
+
+ if (s->arr1 == NULL || s->arr2 == NULL || s->ftab == NULL) {
+ if (s->arr1 != NULL) BZFREE(s->arr1);
+ if (s->arr2 != NULL) BZFREE(s->arr2);
+ if (s->ftab != NULL) BZFREE(s->ftab);
+ if (s != NULL) BZFREE(s);
+ return BZ_MEM_ERROR;
+ }
+
+ s->blockNo = 0;
+ s->state = BZ_S_INPUT;
+ s->mode = BZ_M_RUNNING;
+ s->combinedCRC = 0;
+ s->blockSize100k = blockSize100k;
+ s->nblockMAX = 100000 * blockSize100k - 19;
+ s->verbosity = verbosity;
+ s->workFactor = workFactor;
+
+ s->block = (UInt16*)s->arr2;
+ s->mtfv = (UInt16*)s->arr1;
+ s->zbits = NULL;
+ s->ptr = (UInt32*)s->arr1;
+
+ strm->state = s;
+ strm->total_in = 0;
+ strm->total_out = 0;
+ init_RL ( s );
+ prepare_new_block ( s );
+ return BZ_OK;
+}
+
+
+/*---------------------------------------------------*/
+static
+void add_pair_to_block ( EState* s )
+{
+ Int32 i;
+ UChar ch = (UChar)(s->state_in_ch);
+ for (i = 0; i < s->state_in_len; i++) {
+ BZ_UPDATE_CRC( s->blockCRC, ch );
+ }
+ s->inUse[s->state_in_ch] = True;
+ switch (s->state_in_len) {
+ case 1:
+ s->block[s->nblock] = (UInt16)ch; s->nblock++;
+ break;
+ case 2:
+ s->block[s->nblock] = (UInt16)ch; s->nblock++;
+ s->block[s->nblock] = (UInt16)ch; s->nblock++;
+ break;
+ case 3:
+ s->block[s->nblock] = (UInt16)ch; s->nblock++;
+ s->block[s->nblock] = (UInt16)ch; s->nblock++;
+ s->block[s->nblock] = (UInt16)ch; s->nblock++;
+ break;
+ default:
+ s->inUse[s->state_in_len-4] = True;
+ s->block[s->nblock] = (UInt16)ch; s->nblock++;
+ s->block[s->nblock] = (UInt16)ch; s->nblock++;
+ s->block[s->nblock] = (UInt16)ch; s->nblock++;
+ s->block[s->nblock] = (UInt16)ch; s->nblock++;
+ s->block[s->nblock] = ((UInt16)(s->state_in_len-4));
+ s->nblock++;
+ break;
+ }
+}
+
+
+/*---------------------------------------------------*/
+static
+void flush_RL ( EState* s )
+{
+ if (s->state_in_ch < 256) add_pair_to_block ( s );
+ init_RL ( s );
+}
+
+
+/*---------------------------------------------------*/
+#define ADD_CHAR_TO_BLOCK(zs,zchh0) \
+{ \
+ UInt32 zchh = (UInt32)(zchh0); \
+ /*-- fast track the common case --*/ \
+ if (zchh != zs->state_in_ch && \
+ zs->state_in_len == 1) { \
+ UChar ch = (UChar)(zs->state_in_ch); \
+ BZ_UPDATE_CRC( zs->blockCRC, ch ); \
+ zs->inUse[zs->state_in_ch] = True; \
+ zs->block[zs->nblock] = (UInt16)ch; \
+ zs->nblock++; \
+ zs->state_in_ch = zchh; \
+ } \
+ else \
+ /*-- general, uncommon cases --*/ \
+ if (zchh != zs->state_in_ch || \
+ zs->state_in_len == 255) { \
+ if (zs->state_in_ch < 256) \
+ add_pair_to_block ( zs ); \
+ zs->state_in_ch = zchh; \
+ zs->state_in_len = 1; \
+ } else { \
+ zs->state_in_len++; \
+ } \
+}
+
+
+/*---------------------------------------------------*/
+static
+Bool copy_input_until_stop ( EState* s )
+{
+ Bool progress_in = False;
+
+ if (s->mode == BZ_M_RUNNING) {
+
+ /*-- fast track the common case --*/
+ while (True) {
+ /*-- block full? --*/
+ if (s->nblock >= s->nblockMAX) break;
+ /*-- no input? --*/
+ if (s->strm->avail_in == 0) break;
+ progress_in = True;
+ ADD_CHAR_TO_BLOCK ( s, (UInt32)(*((UChar*)(s->strm->next_in))) );
+ s->strm->next_in++;
+ s->strm->avail_in--;
+ s->strm->total_in++;
+ }
+
+ } else {
+
+ /*-- general, uncommon case --*/
+ while (True) {
+ /*-- block full? --*/
+ if (s->nblock >= s->nblockMAX) break;
+ /*-- no input? --*/
+ if (s->strm->avail_in == 0) break;
+ /*-- flush/finish end? --*/
+ if (s->avail_in_expect == 0) break;
+ progress_in = True;
+ ADD_CHAR_TO_BLOCK ( s, (UInt32)(*((UChar*)(s->strm->next_in))) );
+ s->strm->next_in++;
+ s->strm->avail_in--;
+ s->strm->total_in++;
+ s->avail_in_expect--;
+ }
+ }
+ return progress_in;
+}
+
+
+/*---------------------------------------------------*/
+static
+Bool copy_output_until_stop ( EState* s )
+{
+ Bool progress_out = False;
+
+ while (True) {
+
+ /*-- no output space? --*/
+ if (s->strm->avail_out == 0) break;
+
+ /*-- block done? --*/
+ if (s->state_out_pos >= s->numZ) break;
+
+ progress_out = True;
+ *(s->strm->next_out) = s->zbits[s->state_out_pos];
+ s->state_out_pos++;
+ s->strm->avail_out--;
+ s->strm->next_out++;
+ s->strm->total_out++;
+
+ }
+
+ return progress_out;
+}
+
+
+/*---------------------------------------------------*/
+static
+Bool handle_compress ( bz_stream* strm )
+{
+ Bool progress_in = False;
+ Bool progress_out = False;
+ EState* s = strm->state;
+
+ while (True) {
+
+ if (s->state == BZ_S_OUTPUT) {
+ progress_out |= copy_output_until_stop ( s );
+ if (s->state_out_pos < s->numZ) break;
+ if (s->mode == BZ_M_FINISHING &&
+ s->avail_in_expect == 0 &&
+ isempty_RL(s)) break;
+ prepare_new_block ( s );
+ s->state = BZ_S_INPUT;
+ if (s->mode == BZ_M_FLUSHING &&
+ s->avail_in_expect == 0 &&
+ isempty_RL(s)) break;
+ }
+
+ if (s->state == BZ_S_INPUT) {
+ progress_in |= copy_input_until_stop ( s );
+ if (s->mode != BZ_M_RUNNING && s->avail_in_expect == 0) {
+ flush_RL ( s );
+ compressBlock ( s, (Bool)(s->mode == BZ_M_FINISHING) );
+ s->state = BZ_S_OUTPUT;
+ }
+ else
+ if (s->nblock >= s->nblockMAX) {
+ compressBlock ( s, False );
+ s->state = BZ_S_OUTPUT;
+ }
+ else
+ if (s->strm->avail_in == 0) {
+ break;
+ }
+ }
+
+ }
+
+ return progress_in || progress_out;
+}
+
+
+/*---------------------------------------------------*/
+int BZ_API(bzCompress) ( bz_stream *strm, int action )
+{
+ Bool progress;
+ EState* s;
+ if (strm == NULL) return BZ_PARAM_ERROR;
+ s = strm->state;
+ if (s == NULL) return BZ_PARAM_ERROR;
+ if (s->strm != strm) return BZ_PARAM_ERROR;
+
+ preswitch:
+ switch (s->mode) {
+
+ case BZ_M_IDLE:
+ return BZ_SEQUENCE_ERROR;
+
+ case BZ_M_RUNNING:
+ if (action == BZ_RUN) {
+ progress = handle_compress ( strm );
+ return progress ? BZ_RUN_OK : BZ_PARAM_ERROR;
+ }
+ else
+ if (action == BZ_FLUSH) {
+ s->avail_in_expect = strm->avail_in;
+ s->mode = BZ_M_FLUSHING;
+ goto preswitch;
+ }
+ else
+ if (action == BZ_FINISH) {
+ s->avail_in_expect = strm->avail_in;
+ s->mode = BZ_M_FINISHING;
+ goto preswitch;
+ }
+ else
+ return BZ_PARAM_ERROR;
+
+ case BZ_M_FLUSHING:
+ if (action != BZ_FLUSH) return BZ_SEQUENCE_ERROR;
+ if (s->avail_in_expect != s->strm->avail_in) return BZ_SEQUENCE_ERROR;
+ progress = handle_compress ( strm );
+ if (s->avail_in_expect > 0 || !isempty_RL(s) ||
+ s->state_out_pos < s->numZ) return BZ_FLUSH_OK;
+ s->mode = BZ_M_RUNNING;
+ return BZ_RUN_OK;
+
+ case BZ_M_FINISHING:
+ if (action != BZ_FINISH) return BZ_SEQUENCE_ERROR;
+ if (s->avail_in_expect != s->strm->avail_in) return BZ_SEQUENCE_ERROR;
+ progress = handle_compress ( strm );
+ if (!progress) return BZ_SEQUENCE_ERROR;
+ if (s->avail_in_expect > 0 || !isempty_RL(s) ||
+ s->state_out_pos < s->numZ) return BZ_FINISH_OK;
+ s->mode = BZ_M_IDLE;
+ return BZ_STREAM_END;
+ }
+ return BZ_OK; /*--not reached--*/
+}
+
+
+/*---------------------------------------------------*/
+int BZ_API(bzCompressEnd) ( bz_stream *strm )
+{
+ EState* s;
+ if (strm == NULL) return BZ_PARAM_ERROR;
+ s = strm->state;
+ if (s == NULL) return BZ_PARAM_ERROR;
+ if (s->strm != strm) return BZ_PARAM_ERROR;
+
+ if (s->arr1 != NULL) BZFREE(s->arr1);
+ if (s->arr2 != NULL) BZFREE(s->arr2);
+ if (s->ftab != NULL) BZFREE(s->ftab);
+ BZFREE(strm->state);
+
+ strm->state = NULL;
+
+ return BZ_OK;
+}
+
+
+#ifndef BZ_NO_STDIO
+/*---------------------------------------------------*/
+/*--- File I/O stuff ---*/
+/*---------------------------------------------------*/
+
+#define BZ_SETERR(eee) \
+{ \
+ if (bzerror != NULL) *bzerror = eee; \
+ if (bzf != NULL) bzf->lastErr = eee; \
+}
+
+typedef
+ struct {
+ FILE* handle;
+ Char buf[BZ_MAX_UNUSED];
+ Int32 bufN;
+ Bool writing;
+ bz_stream strm;
+ Int32 lastErr;
+ Bool initialisedOk;
+ }
+ bzFile;
+
+
+/*---------------------------------------------------*/
+BZFILE* BZ_API(bzWriteOpen)
+ ( int* bzerror,
+ FILE* f,
+ int blockSize100k,
+ int verbosity,
+ int workFactor )
+{
+ Int32 ret;
+ bzFile* bzf = NULL;
+
+ BZ_SETERR(BZ_OK);
+
+ if (f == NULL ||
+ (blockSize100k < 1 || blockSize100k > 9) ||
+ (workFactor < 0 || workFactor > 250) ||
+ (verbosity < 0 || verbosity > 4))
+ { BZ_SETERR(BZ_PARAM_ERROR); return NULL; };
+
+ if (ferror(f))
+ { BZ_SETERR(BZ_IO_ERROR); return NULL; };
+
+ bzf = malloc ( sizeof(bzFile) );
+ if (bzf == NULL)
+ { BZ_SETERR(BZ_MEM_ERROR); return NULL; };
+
+ BZ_SETERR(BZ_OK);
+ bzf->initialisedOk = False;
+ bzf->bufN = 0;
+ bzf->handle = f;
+ bzf->writing = True;
+ bzf->strm.bzalloc = NULL;
+ bzf->strm.bzfree = NULL;
+ bzf->strm.opaque = NULL;
+
+ if (workFactor == 0) workFactor = 30;
+ ret = bzCompressInit ( &(bzf->strm), blockSize100k,
+ verbosity, workFactor );
+ if (ret != BZ_OK)
+ { BZ_SETERR(ret); free(bzf); return NULL; };
+
+ bzf->strm.avail_in = 0;
+ bzf->initialisedOk = True;
+ return bzf;
+}
+
+
+
+/*---------------------------------------------------*/
+void BZ_API(bzWrite)
+ ( int* bzerror,
+ BZFILE* b,
+ void* buf,
+ int len )
+{
+ Int32 n, n2, ret;
+ bzFile* bzf = (bzFile*)b;
+
+ BZ_SETERR(BZ_OK);
+ if (bzf == NULL || buf == NULL || len < 0)
+ { BZ_SETERR(BZ_PARAM_ERROR); return; };
+ if (!(bzf->writing))
+ { BZ_SETERR(BZ_SEQUENCE_ERROR); return; };
+ if (ferror(bzf->handle))
+ { BZ_SETERR(BZ_IO_ERROR); return; };
+
+ if (len == 0)
+ { BZ_SETERR(BZ_OK); return; };
+
+ bzf->strm.avail_in = len;
+ bzf->strm.next_in = buf;
+
+ while (True) {
+ bzf->strm.avail_out = BZ_MAX_UNUSED;
+ bzf->strm.next_out = bzf->buf;
+ ret = bzCompress ( &(bzf->strm), BZ_RUN );
+ if (ret != BZ_RUN_OK)
+ { BZ_SETERR(ret); return; };
+
+ if (bzf->strm.avail_out < BZ_MAX_UNUSED) {
+ n = BZ_MAX_UNUSED - bzf->strm.avail_out;
+ n2 = fwrite ( (void*)(bzf->buf), sizeof(UChar),
+ n, bzf->handle );
+ if (n != n2 || ferror(bzf->handle))
+ { BZ_SETERR(BZ_IO_ERROR); return; };
+ }
+
+ if (bzf->strm.avail_in == 0)
+ { BZ_SETERR(BZ_OK); return; };
+ }
+}
+
+
+/*---------------------------------------------------*/
+void BZ_API(bzWriteClose)
+ ( int* bzerror,
+ BZFILE* b,
+ int abandon,
+ unsigned int* nbytes_in,
+ unsigned int* nbytes_out )
+{
+ Int32 n, n2, ret;
+ bzFile* bzf = (bzFile*)b;
+
+ if (bzf == NULL)
+ { BZ_SETERR(BZ_OK); return; };
+ if (!(bzf->writing))
+ { BZ_SETERR(BZ_SEQUENCE_ERROR); return; };
+ if (ferror(bzf->handle))
+ { BZ_SETERR(BZ_IO_ERROR); return; };
+
+ if (nbytes_in != NULL) *nbytes_in = 0;
+ if (nbytes_out != NULL) *nbytes_out = 0;
+
+ if ((!abandon) && bzf->lastErr == BZ_OK) {
+ while (True) {
+ bzf->strm.avail_out = BZ_MAX_UNUSED;
+ bzf->strm.next_out = bzf->buf;
+ ret = bzCompress ( &(bzf->strm), BZ_FINISH );
+ if (ret != BZ_FINISH_OK && ret != BZ_STREAM_END)
+ { BZ_SETERR(ret); return; };
+
+ if (bzf->strm.avail_out < BZ_MAX_UNUSED) {
+ n = BZ_MAX_UNUSED - bzf->strm.avail_out;
+ n2 = fwrite ( (void*)(bzf->buf), sizeof(UChar),
+ n, bzf->handle );
+ if (n != n2 || ferror(bzf->handle))
+ { BZ_SETERR(BZ_IO_ERROR); return; };
+ }
+
+ if (ret == BZ_STREAM_END) break;
+ }
+ }
+
+ if ( !abandon && !ferror ( bzf->handle ) ) {
+ fflush ( bzf->handle );
+ if (ferror(bzf->handle))
+ { BZ_SETERR(BZ_IO_ERROR); return; };
+ }
+
+ if (nbytes_in != NULL) *nbytes_in = bzf->strm.total_in;
+ if (nbytes_out != NULL) *nbytes_out = bzf->strm.total_out;
+
+ BZ_SETERR(BZ_OK);
+ bzCompressEnd ( &(bzf->strm) );
+ free ( bzf );
+}
+
+
+/*---------------------------------------------------*/
+void BZ_API(bzReadGetUnused)
+ ( int* bzerror,
+ BZFILE* b,
+ void** unused,
+ int* nUnused )
+{
+ bzFile* bzf = (bzFile*)b;
+ if (bzf == NULL)
+ { BZ_SETERR(BZ_PARAM_ERROR); return; };
+ if (bzf->lastErr != BZ_STREAM_END)
+ { BZ_SETERR(BZ_SEQUENCE_ERROR); return; };
+ if (unused == NULL || nUnused == NULL)
+ { BZ_SETERR(BZ_PARAM_ERROR); return; };
+
+ BZ_SETERR(BZ_OK);
+ *nUnused = bzf->strm.avail_in;
+ *unused = bzf->strm.next_in;
+}
+#endif
+
+
+/*---------------------------------------------------*/
+/*--- Misc convenience stuff ---*/
+/*---------------------------------------------------*/
+
+/*---------------------------------------------------*/
+int BZ_API(bzBuffToBuffCompress)
+ ( char* dest,
+ unsigned int* destLen,
+ char* source,
+ unsigned int sourceLen,
+ int blockSize100k,
+ int verbosity,
+ int workFactor )
+{
+ bz_stream strm;
+ int ret;
+
+ if (dest == NULL || destLen == NULL ||
+ source == NULL ||
+ blockSize100k < 1 || blockSize100k > 9 ||
+ verbosity < 0 || verbosity > 4 ||
+ workFactor < 0 || workFactor > 250)
+ return BZ_PARAM_ERROR;
+
+ if (workFactor == 0) workFactor = 30;
+ strm.bzalloc = NULL;
+ strm.bzfree = NULL;
+ strm.opaque = NULL;
+ ret = bzCompressInit ( &strm, blockSize100k,
+ verbosity, workFactor );
+ if (ret != BZ_OK) return ret;
+
+ strm.next_in = source;
+ strm.next_out = dest;
+ strm.avail_in = sourceLen;
+ strm.avail_out = *destLen;
+
+ ret = bzCompress ( &strm, BZ_FINISH );
+ if (ret == BZ_FINISH_OK) goto output_overflow;
+ if (ret != BZ_STREAM_END) goto errhandler;
+
+ /* normal termination */
+ *destLen -= strm.avail_out;
+ bzCompressEnd ( &strm );
+ return BZ_OK;
+
+ output_overflow:
+ bzCompressEnd ( &strm );
+ return BZ_OUTBUFF_FULL;
+
+ errhandler:
+ bzCompressEnd ( &strm );
+ return ret;
+}
+
+
+/*---------------------------------------------------*/
+/*--
+ Code contributed by Yoshioka Tsuneo
+ (QWF00133@niftyserve.or.jp/tsuneo-y@is.aist-nara.ac.jp),
+ to support better zlib compatibility.
+ This code is not _officially_ part of libbzip2 (yet);
+ I haven't tested it, documented it, or considered the
+ threading-safeness of it.
+ If this code breaks, please contact both Yoshioka and me.
+--*/
+/*---------------------------------------------------*/
+
+/*---------------------------------------------------*/
+/*--
+ return version like "0.9.0c".
+--*/
+const char * BZ_API(bzlibVersion)(void)
+{
+ return BZ_VERSION;
+}
+
+
+#ifndef BZ_NO_STDIO
+/*---------------------------------------------------*/
+
+#if defined(_WIN32) || defined(OS2) || defined(MSDOS)
+# include <fcntl.h>
+# include <io.h>
+# define SET_BINARY_MODE(file) setmode(fileno(file),O_BINARY)
+#else
+# define SET_BINARY_MODE(file)
+#endif
+static
+BZFILE * bzopen_or_bzdopen
+ ( const char *path, /* no use when bzdopen */
+ int fd, /* no use when bzdopen */
+ const char *mode,
+ int open_mode) /* bzopen: 0, bzdopen:1 */
+{
+ int bzerr;
+ int blockSize100k = 9;
+ int writing = 0;
+ char mode2[10] = "";
+ FILE *fp = NULL;
+ BZFILE *bzfp = NULL;
+ int verbosity = 0;
+ int workFactor = 30;
+
+ if (mode == NULL) return NULL;
+ while (*mode) {
+ switch (*mode) {
+ case 'r':
+ writing = 0; break;
+ case 'w':
+ writing = 1; break;
+ case 's':
+ //smallMode = 1;
+ break;
+ default:
+ if (isdigit((int)(*mode))) {
+ blockSize100k = *mode-'0';
+ }
+ }
+ mode++;
+ }
+ strcat(mode2, writing ? "w" : "r" );
+ strcat(mode2,"b"); /* binary mode */
+
+ if (open_mode==0) {
+ if (path==NULL || strcmp(path,"")==0) {
+ fp = (writing ? stdout : stdin);
+ SET_BINARY_MODE(fp);
+ } else {
+ fp = fopen(path,mode2);
+ }
+ } else {
+#ifdef BZ_STRICT_ANSI
+ fp = NULL;
+#else
+ fp = fdopen(fd,mode2);
+#endif
+ }
+ if (fp == NULL) return NULL;
+
+ if (writing) {
+ /* Guard against total chaos and anarchy -- JRS */
+ if (blockSize100k < 1) blockSize100k = 1;
+ if (blockSize100k > 9) blockSize100k = 9;
+ bzfp = bzWriteOpen(&bzerr,fp,blockSize100k,verbosity,workFactor);
+ }
+ if (bzfp == NULL) {
+ if (fp != stdin && fp != stdout) fclose(fp);
+ return NULL;
+ }
+ return bzfp;
+}
+
+
+/*---------------------------------------------------*/
+/*--
+ open file for read or write.
+ ex) bzopen("file","w9")
+ case path="" or NULL => use stdin or stdout.
+--*/
+BZFILE * BZ_API(bzopen)
+ ( const char *path,
+ const char *mode )
+{
+ return bzopen_or_bzdopen(path,-1,mode,/*bzopen*/0);
+}
+
+
+/*---------------------------------------------------*/
+BZFILE * BZ_API(bzdopen)
+ ( int fd,
+ const char *mode )
+{
+ return bzopen_or_bzdopen(NULL,fd,mode,/*bzdopen*/1);
+}
+
+
+/*---------------------------------------------------*/
+int BZ_API(bzwrite) (BZFILE* b, void* buf, int len )
+{
+ int bzerr;
+
+ bzWrite(&bzerr,b,buf,len);
+ if(bzerr == BZ_OK){
+ return len;
+ }else{
+ return -1;
+ }
+}
+
+
+/*---------------------------------------------------*/
+int BZ_API(bzflush) (BZFILE *b)
+{
+ /* do nothing now... */
+ return 0;
+}
+
+
+/*---------------------------------------------------*/
+void BZ_API(bzclose) (BZFILE* b)
+{
+ int bzerr;
+ FILE *fp = ((bzFile *)b)->handle;
+
+ if (b==NULL) {return;}
+ if(((bzFile*)b)->writing){
+ bzWriteClose(&bzerr,b,0,NULL,NULL);
+ if(bzerr != BZ_OK){
+ bzWriteClose(NULL,b,1,NULL,NULL);
+ }
+ }
+ if(fp!=stdin && fp!=stdout){
+ fclose(fp);
+ }
+}
+
+
+/*---------------------------------------------------*/
+/*--
+ return last error code
+--*/
+static char *bzerrorstrings[] = {
+ "OK"
+ ,"SEQUENCE_ERROR"
+ ,"PARAM_ERROR"
+ ,"MEM_ERROR"
+ ,"DATA_ERROR"
+ ,"DATA_ERROR_MAGIC"
+ ,"IO_ERROR"
+ ,"UNEXPECTED_EOF"
+ ,"OUTBUFF_FULL"
+ ,"???" /* for future */
+ ,"???" /* for future */
+ ,"???" /* for future */
+ ,"???" /* for future */
+ ,"???" /* for future */
+ ,"???" /* for future */
+};
+
+
+const char * BZ_API(bzerror) (BZFILE *b, int *errnum)
+{
+ int err = ((bzFile *)b)->lastErr;
+
+ if(err>0) err = 0;
+ *errnum = err;
+ return bzerrorstrings[err*-1];
+}
+#endif
+
+
+/*-------------------------------------------------------------*/
+/*--- end bzlib.c ---*/
+/*-------------------------------------------------------------*/
--- /dev/null
+
+/*-------------------------------------------------------------*/
+/*--- Public header file for the library. ---*/
+/*--- bzlib.h ---*/
+/*-------------------------------------------------------------*/
+
+/* This has been heavily hacked to be part of zgz. Decompression
+ * support has been ripped out. */
+
+/*--
+ This file is a part of bzip2 and/or libbzip2, a program and
+ library for lossless, block-sorting data compression.
+
+ Copyright (C) 1996-1999 Julian R Seward. All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+
+ 1. Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+
+ 2. The origin of this software must not be misrepresented; you must
+ not claim that you wrote the original software. If you use this
+ software in a product, an acknowledgment in the product
+ documentation would be appreciated but is not required.
+
+ 3. Altered source versions must be plainly marked as such, and must
+ not be misrepresented as being the original software.
+
+ 4. The name of the author may not be used to endorse or promote
+ products derived from this software without specific prior written
+ permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
+ OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ Julian Seward, Cambridge, UK.
+ jseward@acm.org
+ bzip2/libbzip2 version 0.9.5 of 24 May 1999
+
+ This program is based on (at least) the work of:
+ Mike Burrows
+ David Wheeler
+ Peter Fenwick
+ Alistair Moffat
+ Radford Neal
+ Ian H. Witten
+ Robert Sedgewick
+ Jon L. Bentley
+
+ For more information on these sources, see the manual.
+--*/
+
+
+#ifndef _BZLIB_H
+#define _BZLIB_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define BZ_RUN 0
+#define BZ_FLUSH 1
+#define BZ_FINISH 2
+
+#define BZ_OK 0
+#define BZ_RUN_OK 1
+#define BZ_FLUSH_OK 2
+#define BZ_FINISH_OK 3
+#define BZ_STREAM_END 4
+#define BZ_SEQUENCE_ERROR (-1)
+#define BZ_PARAM_ERROR (-2)
+#define BZ_MEM_ERROR (-3)
+#define BZ_DATA_ERROR (-4)
+#define BZ_DATA_ERROR_MAGIC (-5)
+#define BZ_IO_ERROR (-6)
+#define BZ_UNEXPECTED_EOF (-7)
+#define BZ_OUTBUFF_FULL (-8)
+
+typedef
+ struct {
+ char *next_in;
+ unsigned int avail_in;
+ unsigned int total_in;
+
+ char *next_out;
+ unsigned int avail_out;
+ unsigned int total_out;
+
+ void *state;
+
+ void *(*bzalloc)(void *,int,int);
+ void (*bzfree)(void *,void *);
+ void *opaque;
+ }
+ bz_stream;
+
+
+#ifndef BZ_IMPORT
+#define BZ_EXPORT
+#endif
+
+#ifdef _WIN32
+# include <stdio.h>
+# include <windows.h>
+# ifdef small
+ /* windows.h define small to char */
+# undef small
+# endif
+# ifdef BZ_EXPORT
+# define BZ_API(func) WINAPI func
+# define BZ_EXTERN extern
+# else
+ /* import windows dll dynamically */
+# define BZ_API(func) (WINAPI * func)
+# define BZ_EXTERN
+# endif
+#else
+# define BZ_API(func) func
+# define BZ_EXTERN extern
+#endif
+
+
+/*-- Core (low-level) library functions --*/
+
+BZ_EXTERN int BZ_API(bzCompressInit) (
+ bz_stream* strm,
+ int blockSize100k,
+ int verbosity,
+ int workFactor
+ );
+
+BZ_EXTERN int BZ_API(bzCompress) (
+ bz_stream* strm,
+ int action
+ );
+
+BZ_EXTERN int BZ_API(bzCompressEnd) (
+ bz_stream* strm
+ );
+
+BZ_EXTERN int BZ_API(bzDecompressInit) (
+ bz_stream *strm,
+ int verbosity,
+ int small
+ );
+
+BZ_EXTERN int BZ_API(bzDecompress) (
+ bz_stream* strm
+ );
+
+BZ_EXTERN int BZ_API(bzDecompressEnd) (
+ bz_stream *strm
+ );
+
+
+
+/*-- High(er) level library functions --*/
+
+#ifndef BZ_NO_STDIO
+#define BZ_MAX_UNUSED 5000
+
+typedef void BZFILE;
+
+BZ_EXTERN BZFILE* BZ_API(bzReadOpen) (
+ int* bzerror,
+ FILE* f,
+ int verbosity,
+ int small,
+ void* unused,
+ int nUnused
+ );
+
+BZ_EXTERN void BZ_API(bzReadClose) (
+ int* bzerror,
+ BZFILE* b
+ );
+
+BZ_EXTERN void BZ_API(bzReadGetUnused) (
+ int* bzerror,
+ BZFILE* b,
+ void** unused,
+ int* nUnused
+ );
+
+BZ_EXTERN int BZ_API(bzRead) (
+ int* bzerror,
+ BZFILE* b,
+ void* buf,
+ int len
+ );
+
+BZ_EXTERN BZFILE* BZ_API(bzWriteOpen) (
+ int* bzerror,
+ FILE* f,
+ int blockSize100k,
+ int verbosity,
+ int workFactor
+ );
+
+BZ_EXTERN void BZ_API(bzWrite) (
+ int* bzerror,
+ BZFILE* b,
+ void* buf,
+ int len
+ );
+
+BZ_EXTERN void BZ_API(bzWriteClose) (
+ int* bzerror,
+ BZFILE* b,
+ int abandon,
+ unsigned int* nbytes_in,
+ unsigned int* nbytes_out
+ );
+#endif
+
+
+/*-- Utility functions --*/
+
+BZ_EXTERN int BZ_API(bzBuffToBuffCompress) (
+ char* dest,
+ unsigned int* destLen,
+ char* source,
+ unsigned int sourceLen,
+ int blockSize100k,
+ int verbosity,
+ int workFactor
+ );
+
+BZ_EXTERN int BZ_API(bzBuffToBuffDecompress) (
+ char* dest,
+ unsigned int* destLen,
+ char* source,
+ unsigned int sourceLen,
+ int small,
+ int verbosity
+ );
+
+
+/*--
+ Code contributed by Yoshioka Tsuneo
+ (QWF00133@niftyserve.or.jp/tsuneo-y@is.aist-nara.ac.jp),
+ to support better zlib compatibility.
+ This code is not _officially_ part of libbzip2 (yet);
+ I haven't tested it, documented it, or considered the
+ threading-safeness of it.
+ If this code breaks, please contact both Yoshioka and me.
+--*/
+
+BZ_EXTERN const char * BZ_API(bzlibVersion) (
+ void
+ );
+
+#ifndef BZ_NO_STDIO
+BZ_EXTERN BZFILE * BZ_API(bzopen) (
+ const char *path,
+ const char *mode
+ );
+
+BZ_EXTERN BZFILE * BZ_API(bzdopen) (
+ int fd,
+ const char *mode
+ );
+
+BZ_EXTERN int BZ_API(bzread) (
+ BZFILE* b,
+ void* buf,
+ int len
+ );
+
+BZ_EXTERN int BZ_API(bzwrite) (
+ BZFILE* b,
+ void* buf,
+ int len
+ );
+
+BZ_EXTERN int BZ_API(bzflush) (
+ BZFILE* b
+ );
+
+BZ_EXTERN void BZ_API(bzclose) (
+ BZFILE* b
+ );
+
+BZ_EXTERN const char * BZ_API(bzerror) (
+ BZFILE *b,
+ int *errnum
+ );
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+
+/*-------------------------------------------------------------*/
+/*--- end bzlib.h ---*/
+/*-------------------------------------------------------------*/
--- /dev/null
+
+/*-------------------------------------------------------------*/
+/*--- Private header file for the library. ---*/
+/*--- bzlib_private.h ---*/
+/*-------------------------------------------------------------*/
+
+/*--
+ This file is a part of bzip2 and/or libbzip2, a program and
+ library for lossless, block-sorting data compression.
+
+ Copyright (C) 1996-1999 Julian R Seward. All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+
+ 1. Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+
+ 2. The origin of this software must not be misrepresented; you must
+ not claim that you wrote the original software. If you use this
+ software in a product, an acknowledgment in the product
+ documentation would be appreciated but is not required.
+
+ 3. Altered source versions must be plainly marked as such, and must
+ not be misrepresented as being the original software.
+
+ 4. The name of the author may not be used to endorse or promote
+ products derived from this software without specific prior written
+ permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
+ OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ Julian Seward, Cambridge, UK.
+ jseward@acm.org
+ bzip2/libbzip2 version 0.9.5 of 24 May 1999
+
+ This program is based on (at least) the work of:
+ Mike Burrows
+ David Wheeler
+ Peter Fenwick
+ Alistair Moffat
+ Radford Neal
+ Ian H. Witten
+ Robert Sedgewick
+ Jon L. Bentley
+
+ For more information on these sources, see the manual.
+--*/
+
+
+#ifndef _BZLIB_PRIVATE_H
+#define _BZLIB_PRIVATE_H
+
+#include <stdlib.h>
+
+#ifndef BZ_NO_STDIO
+#include <stdio.h>
+#include <ctype.h>
+#include <string.h>
+#endif
+
+#include "bzlib.h"
+
+
+
+/*-- General stuff. --*/
+
+#define BZ_VERSION "0.9.5d"
+
+typedef char Char;
+typedef unsigned char Bool;
+typedef unsigned char UChar;
+typedef int Int32;
+typedef unsigned int UInt32;
+typedef short Int16;
+typedef unsigned short UInt16;
+
+#define True ((Bool)1)
+#define False ((Bool)0)
+
+#ifndef __GNUC__
+#define __inline__ /* */
+#endif
+
+#ifndef BZ_NO_STDIO
+extern void bz__AssertH__fail ( int errcode );
+#define AssertH(cond,errcode) \
+ { if (!(cond)) bz__AssertH__fail ( errcode ); }
+#if BZ_DEBUG
+#define AssertD(cond,msg) \
+ { if (!(cond)) { \
+ fprintf ( stderr, \
+ "\n\nlibbzip2(debug build): internal error\n\t%s\n", msg );\
+ exit(1); \
+ }}
+#else
+#define AssertD(cond,msg) /* */
+#endif
+#define VPrintf0(zf) \
+ fprintf(stderr,zf)
+#define VPrintf1(zf,za1) \
+ fprintf(stderr,zf,za1)
+#define VPrintf2(zf,za1,za2) \
+ fprintf(stderr,zf,za1,za2)
+#define VPrintf3(zf,za1,za2,za3) \
+ fprintf(stderr,zf,za1,za2,za3)
+#define VPrintf4(zf,za1,za2,za3,za4) \
+ fprintf(stderr,zf,za1,za2,za3,za4)
+#define VPrintf5(zf,za1,za2,za3,za4,za5) \
+ fprintf(stderr,zf,za1,za2,za3,za4,za5)
+#else
+extern void bz_internal_error ( int errcode );
+#define AssertH(cond,errcode) \
+ { if (!(cond)) bz_internal_error ( errcode ); }
+#define AssertD(cond,msg) /* */
+#define VPrintf0(zf) /* */
+#define VPrintf1(zf,za1) /* */
+#define VPrintf2(zf,za1,za2) /* */
+#define VPrintf3(zf,za1,za2,za3) /* */
+#define VPrintf4(zf,za1,za2,za3,za4) /* */
+#define VPrintf5(zf,za1,za2,za3,za4,za5) /* */
+#endif
+
+
+#define BZALLOC(nnn) (strm->bzalloc)(strm->opaque,(nnn),1)
+#define BZFREE(ppp) (strm->bzfree)(strm->opaque,(ppp))
+
+
+/*-- Constants for the back end. --*/
+
+#define BZ_MAX_ALPHA_SIZE 258
+#define BZ_MAX_CODE_LEN 23
+
+#define BZ_RUNA 0
+#define BZ_RUNB 1
+
+#define BZ_N_GROUPS 6
+#define BZ_G_SIZE 50
+#define BZ_N_ITERS 4
+
+#define BZ_MAX_SELECTORS (2 + (900000 / BZ_G_SIZE))
+
+
+
+/*-- Stuff for randomising repetitive blocks. --*/
+
+extern Int32 rNums[512];
+
+#define BZ_RAND_DECLS \
+ Int32 rNToGo; \
+ Int32 rTPos \
+
+#define BZ_RAND_INIT_MASK \
+ s->rNToGo = 0; \
+ s->rTPos = 0 \
+
+#define BZ_RAND_MASK ((s->rNToGo == 1) ? 1 : 0)
+
+#define BZ_RAND_UPD_MASK \
+ if (s->rNToGo == 0) { \
+ s->rNToGo = rNums[s->rTPos]; \
+ s->rTPos++; \
+ if (s->rTPos == 512) s->rTPos = 0; \
+ } \
+ s->rNToGo--;
+
+
+
+/*-- Stuff for doing CRCs. --*/
+
+extern UInt32 crc32Table[256];
+
+#define BZ_INITIALISE_CRC(crcVar) \
+{ \
+ crcVar = 0xffffffffL; \
+}
+
+#define BZ_FINALISE_CRC(crcVar) \
+{ \
+ crcVar = ~(crcVar); \
+}
+
+#define BZ_UPDATE_CRC(crcVar,cha) \
+{ \
+ crcVar = (crcVar << 8) ^ \
+ crc32Table[(crcVar >> 24) ^ \
+ ((UChar)cha)]; \
+}
+
+
+
+/*-- States and modes for compression. --*/
+
+#define BZ_M_IDLE 1
+#define BZ_M_RUNNING 2
+#define BZ_M_FLUSHING 3
+#define BZ_M_FINISHING 4
+
+#define BZ_S_OUTPUT 1
+#define BZ_S_INPUT 2
+
+#define BZ_N_RADIX 2
+#define BZ_N_QSORT 12
+#define BZ_N_SHELL 18
+#define BZ_N_OVERSHOOT (BZ_N_RADIX + BZ_N_QSORT + BZ_N_SHELL + 2)
+
+
+
+
+/*-- Structure holding all the compression-side stuff. --*/
+
+typedef
+ struct {
+ /* pointer back to the struct bz_stream */
+ bz_stream* strm;
+
+ /* mode this stream is in, and whether inputting */
+ /* or outputting data */
+ Int32 mode;
+ Int32 state;
+
+ /* remembers avail_in when flush/finish requested */
+ UInt32 avail_in_expect;
+
+ /* for doing the block sorting */
+ UInt32* arr1;
+ UInt32* arr2;
+ UInt32* ftab;
+ Int32 origPtr;
+
+ /* aliases for arr1 and arr2 */
+ UInt32* ptr;
+ UInt16* block;
+ UInt16* mtfv;
+ UChar* zbits;
+
+ /* for deciding when to use the fallback sorting algorithm */
+ Int32 workFactor;
+
+ /* run-length-encoding of the input */
+ UInt32 state_in_ch;
+ Int32 state_in_len;
+ BZ_RAND_DECLS;
+
+ /* input and output limits and current posns */
+ Int32 nblock;
+ Int32 nblockMAX;
+ Int32 numZ;
+ Int32 state_out_pos;
+
+ /* map of bytes used in block */
+ Int32 nInUse;
+ Bool inUse[256];
+ UChar unseqToSeq[256];
+
+ /* the buffer for bit stream creation */
+ UInt32 bsBuff;
+ Int32 bsLive;
+
+ /* block and combined CRCs */
+ UInt32 blockCRC;
+ UInt32 combinedCRC;
+
+ /* misc administratium */
+ Int32 verbosity;
+ Int32 blockNo;
+ Int32 blockSize100k;
+
+ /* stuff for coding the MTF values */
+ Int32 nMTF;
+ Int32 mtfFreq [BZ_MAX_ALPHA_SIZE];
+ UChar selector [BZ_MAX_SELECTORS];
+ UChar selectorMtf[BZ_MAX_SELECTORS];
+
+ UChar len [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
+ Int32 code [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
+ Int32 rfreq[BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
+
+ }
+ EState;
+
+
+
+/*-- externs for compression. --*/
+
+extern void
+blockSort ( EState* );
+
+extern void
+compressBlock ( EState*, Bool );
+
+extern void
+bsInitWrite ( EState* );
+
+extern void
+hbAssignCodes ( Int32*, UChar*, Int32, Int32, Int32 );
+
+extern void
+hbMakeCodeLengths ( UChar*, Int32*, Int32, Int32 );
+
+
+
+/*-- states for decompression. --*/
+
+#define BZ_X_IDLE 1
+#define BZ_X_OUTPUT 2
+
+#define BZ_X_MAGIC_1 10
+#define BZ_X_MAGIC_2 11
+#define BZ_X_MAGIC_3 12
+#define BZ_X_MAGIC_4 13
+#define BZ_X_BLKHDR_1 14
+#define BZ_X_BLKHDR_2 15
+#define BZ_X_BLKHDR_3 16
+#define BZ_X_BLKHDR_4 17
+#define BZ_X_BLKHDR_5 18
+#define BZ_X_BLKHDR_6 19
+#define BZ_X_BCRC_1 20
+#define BZ_X_BCRC_2 21
+#define BZ_X_BCRC_3 22
+#define BZ_X_BCRC_4 23
+#define BZ_X_RANDBIT 24
+#define BZ_X_ORIGPTR_1 25
+#define BZ_X_ORIGPTR_2 26
+#define BZ_X_ORIGPTR_3 27
+#define BZ_X_MAPPING_1 28
+#define BZ_X_MAPPING_2 29
+#define BZ_X_SELECTOR_1 30
+#define BZ_X_SELECTOR_2 31
+#define BZ_X_SELECTOR_3 32
+#define BZ_X_CODING_1 33
+#define BZ_X_CODING_2 34
+#define BZ_X_CODING_3 35
+#define BZ_X_MTF_1 36
+#define BZ_X_MTF_2 37
+#define BZ_X_MTF_3 38
+#define BZ_X_MTF_4 39
+#define BZ_X_MTF_5 40
+#define BZ_X_MTF_6 41
+#define BZ_X_ENDHDR_2 42
+#define BZ_X_ENDHDR_3 43
+#define BZ_X_ENDHDR_4 44
+#define BZ_X_ENDHDR_5 45
+#define BZ_X_ENDHDR_6 46
+#define BZ_X_CCRC_1 47
+#define BZ_X_CCRC_2 48
+#define BZ_X_CCRC_3 49
+#define BZ_X_CCRC_4 50
+
+
+
+/*-- Constants for the fast MTF decoder. --*/
+
+#define MTFA_SIZE 4096
+#define MTFL_SIZE 16
+
+
+
+/*-- Structure holding all the decompression-side stuff. --*/
+
+typedef
+ struct {
+ /* pointer back to the struct bz_stream */
+ bz_stream* strm;
+
+ /* state indicator for this stream */
+ Int32 state;
+
+ /* for doing the final run-length decoding */
+ UChar state_out_ch;
+ Int32 state_out_len;
+ Bool blockRandomised;
+ BZ_RAND_DECLS;
+
+ /* the buffer for bit stream reading */
+ UInt32 bsBuff;
+ Int32 bsLive;
+
+ /* misc administratium */
+ Int32 blockSize100k;
+ Bool smallDecompress;
+ Int32 currBlockNo;
+ Int32 verbosity;
+
+ /* for undoing the Burrows-Wheeler transform */
+ Int32 origPtr;
+ UInt32 tPos;
+ Int32 k0;
+ Int32 unzftab[256];
+ Int32 nblock_used;
+ Int32 cftab[257];
+ Int32 cftabCopy[257];
+
+ /* for undoing the Burrows-Wheeler transform (FAST) */
+ UInt32 *tt;
+
+ /* for undoing the Burrows-Wheeler transform (SMALL) */
+ UInt16 *ll16;
+ UChar *ll4;
+
+ /* stored and calculated CRCs */
+ UInt32 storedBlockCRC;
+ UInt32 storedCombinedCRC;
+ UInt32 calculatedBlockCRC;
+ UInt32 calculatedCombinedCRC;
+
+ /* map of bytes used in block */
+ Int32 nInUse;
+ Bool inUse[256];
+ Bool inUse16[16];
+ UChar seqToUnseq[256];
+
+ /* for decoding the MTF values */
+ UChar mtfa [MTFA_SIZE];
+ Int32 mtfbase[256 / MTFL_SIZE];
+ UChar selector [BZ_MAX_SELECTORS];
+ UChar selectorMtf[BZ_MAX_SELECTORS];
+ UChar len [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
+
+ Int32 limit [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
+ Int32 base [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
+ Int32 perm [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
+ Int32 minLens[BZ_N_GROUPS];
+
+ /* save area for scalars in the main decompress code */
+ Int32 save_i;
+ Int32 save_j;
+ Int32 save_t;
+ Int32 save_alphaSize;
+ Int32 save_nGroups;
+ Int32 save_nSelectors;
+ Int32 save_EOB;
+ Int32 save_groupNo;
+ Int32 save_groupPos;
+ Int32 save_nextSym;
+ Int32 save_nblockMAX;
+ Int32 save_nblock;
+ Int32 save_es;
+ Int32 save_N;
+ Int32 save_curr;
+ Int32 save_zt;
+ Int32 save_zn;
+ Int32 save_zvec;
+ Int32 save_zj;
+ Int32 save_gSel;
+ Int32 save_gMinlen;
+ Int32* save_gLimit;
+ Int32* save_gBase;
+ Int32* save_gPerm;
+
+ }
+ DState;
+
+
+
+/*-- Macros for decompression. --*/
+
+#define BZ_GET_FAST(cccc) \
+ s->tPos = s->tt[s->tPos]; \
+ cccc = (UChar)(s->tPos & 0xff); \
+ s->tPos >>= 8;
+
+#define BZ_GET_FAST_C(cccc) \
+ c_tPos = c_tt[c_tPos]; \
+ cccc = (UChar)(c_tPos & 0xff); \
+ c_tPos >>= 8;
+
+#define SET_LL4(i,n) \
+ { if (((i) & 0x1) == 0) \
+ s->ll4[(i) >> 1] = (s->ll4[(i) >> 1] & 0xf0) | (n); else \
+ s->ll4[(i) >> 1] = (s->ll4[(i) >> 1] & 0x0f) | ((n) << 4); \
+ }
+
+#define GET_LL4(i) \
+ ((((UInt32)(s->ll4[(i) >> 1])) >> (((i) << 2) & 0x4)) & 0xF)
+
+#define SET_LL(i,n) \
+ { s->ll16[i] = (UInt16)(n & 0x0000ffff); \
+ SET_LL4(i, n >> 16); \
+ }
+
+#define GET_LL(i) \
+ (((UInt32)s->ll16[i]) | (GET_LL4(i) << 16))
+
+#define BZ_GET_SMALL(cccc) \
+ cccc = indexIntoF ( s->tPos, s->cftab ); \
+ s->tPos = GET_LL(s->tPos);
+
+
+/*-- externs for decompression. --*/
+
+extern Int32
+indexIntoF ( Int32, Int32* );
+
+extern Int32
+decompress ( DState* );
+
+extern void
+hbCreateDecodeTables ( Int32*, Int32*, Int32*, UChar*,
+ Int32, Int32, Int32 );
+
+
+#endif
+
+
+/*-- BZ_NO_STDIO seems to make NULL disappear on some platforms. --*/
+
+#ifdef BZ_NO_STDIO
+#ifndef NULL
+#define NULL 0
+#endif
+#endif
+
+
+/*-------------------------------------------------------------*/
+/*--- end bzlib_private.h ---*/
+/*-------------------------------------------------------------*/
--- /dev/null
+
+/*-------------------------------------------------------------*/
+/*--- Compression machinery (not incl block sorting) ---*/
+/*--- compress.c ---*/
+/*-------------------------------------------------------------*/
+
+/*--
+ This file is a part of bzip2 and/or libbzip2, a program and
+ library for lossless, block-sorting data compression.
+
+ Copyright (C) 1996-1999 Julian R Seward. All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+
+ 1. Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+
+ 2. The origin of this software must not be misrepresented; you must
+ not claim that you wrote the original software. If you use this
+ software in a product, an acknowledgment in the product
+ documentation would be appreciated but is not required.
+
+ 3. Altered source versions must be plainly marked as such, and must
+ not be misrepresented as being the original software.
+
+ 4. The name of the author may not be used to endorse or promote
+ products derived from this software without specific prior written
+ permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
+ OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ Julian Seward, Cambridge, UK.
+ jseward@acm.org
+ bzip2/libbzip2 version 0.9.5 of 24 May 1999
+
+ This program is based on (at least) the work of:
+ Mike Burrows
+ David Wheeler
+ Peter Fenwick
+ Alistair Moffat
+ Radford Neal
+ Ian H. Witten
+ Robert Sedgewick
+ Jon L. Bentley
+
+ For more information on these sources, see the manual.
+--*/
+
+/*--
+ CHANGES
+ ~~~~~~~
+ 0.9.0 -- original version.
+
+ 0.9.0a/b -- no changes in this file.
+
+ 0.9.0c
+ * changed setting of nGroups in sendMTFValues() so as to
+ do a bit better on small files
+--*/
+
+#include "bzlib_private.h"
+
+
+/*---------------------------------------------------*/
+/*--- Bit stream I/O ---*/
+/*---------------------------------------------------*/
+
+/*---------------------------------------------------*/
+void bsInitWrite ( EState* s )
+{
+ s->bsLive = 0;
+ s->bsBuff = 0;
+}
+
+
+/*---------------------------------------------------*/
+static
+void bsFinishWrite ( EState* s )
+{
+ while (s->bsLive > 0) {
+ s->zbits[s->numZ] = (UChar)(s->bsBuff >> 24);
+ s->numZ++;
+ s->bsBuff <<= 8;
+ s->bsLive -= 8;
+ }
+}
+
+
+/*---------------------------------------------------*/
+#define bsNEEDW(nz) \
+{ \
+ while (s->bsLive >= 8) { \
+ s->zbits[s->numZ] \
+ = (UChar)(s->bsBuff >> 24); \
+ s->numZ++; \
+ s->bsBuff <<= 8; \
+ s->bsLive -= 8; \
+ } \
+}
+
+
+/*---------------------------------------------------*/
+static
+void bsW ( EState* s, Int32 n, UInt32 v )
+{
+ bsNEEDW ( n );
+ s->bsBuff |= (v << (32 - s->bsLive - n));
+ s->bsLive += n;
+}
+
+
+/*---------------------------------------------------*/
+static
+void bsPutUInt32 ( EState* s, UInt32 u )
+{
+ bsW ( s, 8, (u >> 24) & 0xffL );
+ bsW ( s, 8, (u >> 16) & 0xffL );
+ bsW ( s, 8, (u >> 8) & 0xffL );
+ bsW ( s, 8, u & 0xffL );
+}
+
+
+/*---------------------------------------------------*/
+static
+void bsPutUChar ( EState* s, UChar c )
+{
+ bsW( s, 8, (UInt32)c );
+}
+
+
+/*---------------------------------------------------*/
+/*--- The back end proper ---*/
+/*---------------------------------------------------*/
+
+/*---------------------------------------------------*/
+static
+void makeMaps_e ( EState* s )
+{
+ Int32 i;
+ s->nInUse = 0;
+ for (i = 0; i < 256; i++)
+ if (s->inUse[i]) {
+ s->unseqToSeq[i] = s->nInUse;
+ s->nInUse++;
+ }
+}
+
+
+/*---------------------------------------------------*/
+static
+void generateMTFValues ( EState* s )
+{
+ UChar yy[256];
+ Int32 i, j;
+ UChar tmp;
+ UChar tmp2;
+ Int32 zPend;
+ Int32 wr;
+ Int32 EOB;
+
+ /*
+ After sorting (eg, here),
+ s->arr1 [ 0 .. s->nblock-1 ] holds sorted order,
+ and
+ ((UInt16*)s->arr2) [ 0 .. s->nblock-1 ] [15:8]
+ holds the original block data.
+
+ The first thing to do is generate the MTF values,
+ and put them in
+ ((UInt16*)s->arr1) [ 0 .. s->nblock-1 ].
+ Because there are strictly fewer or equal MTF values
+ than block values, ptr values in this area are overwritten
+ with MTF values only when they are no longer needed.
+
+ The final compressed bitstream is generated into the
+ area starting at
+ (UChar*) (&((UInt16)s->arr2)[s->nblock])
+
+ These storage aliases are set up in bzCompressInit(),
+ except for the last one, which is arranged in
+ compressBlock().
+ */
+ UInt32* ptr = s->ptr;
+ UInt16* block = s->block;
+ UInt16* mtfv = s->mtfv;
+
+ makeMaps_e ( s );
+ EOB = s->nInUse+1;
+
+ for (i = 0; i <= EOB; i++) s->mtfFreq[i] = 0;
+
+ wr = 0;
+ zPend = 0;
+ for (i = 0; i < s->nInUse; i++) yy[i] = (UChar) i;
+
+ for (i = 0; i < s->nblock; i++) {
+ UChar ll_i;
+
+ AssertD ( wr <= i, "generateMTFValues(1)" );
+ j = ptr[i]-1; if (j < 0) j += s->nblock;
+ ll_i = s->unseqToSeq[block[j] >> 8];
+ AssertD ( ll_i < s->nInUse, "generateMTFValues(2a)" );
+
+ tmp = yy[0];
+ if (tmp == ll_i) {
+ zPend++;
+ } else {
+ tmp2 = tmp;
+ tmp = yy[1];
+ yy[1] = tmp2;
+ j = 1;
+ while ( ll_i != tmp ) {
+ j++;
+ tmp2 = tmp;
+ tmp = yy[j];
+ yy[j] = tmp2;
+ };
+ yy[0] = tmp;
+
+ if (zPend > 0) {
+ zPend--;
+ while (True) {
+ if (zPend & 1) {
+ mtfv[wr] = BZ_RUNB; wr++;
+ s->mtfFreq[BZ_RUNB]++;
+ } else {
+ mtfv[wr] = BZ_RUNA; wr++;
+ s->mtfFreq[BZ_RUNA]++;
+ }
+ if (zPend < 2) break;
+ zPend = (zPend - 2) / 2;
+ };
+ zPend = 0;
+ }
+ mtfv[wr] = j+1; wr++; s->mtfFreq[j+1]++;
+ }
+ }
+
+ if (zPend > 0) {
+ zPend--;
+ while (True) {
+ if (zPend & 1) {
+ mtfv[wr] = BZ_RUNB; wr++;
+ s->mtfFreq[BZ_RUNB]++;
+ } else {
+ mtfv[wr] = BZ_RUNA; wr++;
+ s->mtfFreq[BZ_RUNA]++;
+ }
+ if (zPend < 2) break;
+ zPend = (zPend - 2) / 2;
+ };
+ }
+
+ mtfv[wr] = EOB; wr++; s->mtfFreq[EOB]++;
+
+ s->nMTF = wr;
+}
+
+
+/*---------------------------------------------------*/
+#define BZ_LESSER_ICOST 0
+#define BZ_GREATER_ICOST 15
+
+static
+void sendMTFValues ( EState* s )
+{
+ Int32 v, t, i, j, gs, ge, totc, bt, bc, iter;
+ Int32 nSelectors, alphaSize, minLen, maxLen, selCtr;
+ Int32 nGroups, nBytes;
+
+ /*--
+ UChar len [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
+ is a global since the decoder also needs it.
+
+ Int32 code[BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
+ Int32 rfreq[BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
+ are also globals only used in this proc.
+ Made global to keep stack frame size small.
+ --*/
+
+
+ UInt16 cost[BZ_N_GROUPS];
+ Int32 fave[BZ_N_GROUPS];
+
+ UInt16* mtfv = s->mtfv;
+
+ if (s->verbosity >= 3)
+ VPrintf3( " %d in block, %d after MTF & 1-2 coding, "
+ "%d+2 syms in use\n",
+ s->nblock, s->nMTF, s->nInUse );
+
+ alphaSize = s->nInUse+2;
+ for (t = 0; t < BZ_N_GROUPS; t++)
+ for (v = 0; v < alphaSize; v++)
+ s->len[t][v] = BZ_GREATER_ICOST;
+
+ /*--- Decide how many coding tables to use ---*/
+ AssertH ( s->nMTF > 0, 3001 );
+ if (s->nMTF < 200) nGroups = 2; else
+ if (s->nMTF < 600) nGroups = 3; else
+ if (s->nMTF < 1200) nGroups = 4; else
+ if (s->nMTF < 2400) nGroups = 5; else
+ nGroups = 6;
+
+ /*--- Generate an initial set of coding tables ---*/
+ {
+ Int32 nPart, remF, tFreq, aFreq;
+
+ nPart = nGroups;
+ remF = s->nMTF;
+ gs = 0;
+ while (nPart > 0) {
+ tFreq = remF / nPart;
+ ge = gs-1;
+ aFreq = 0;
+ while (aFreq < tFreq && ge < alphaSize-1) {
+ ge++;
+ aFreq += s->mtfFreq[ge];
+ }
+
+ if (ge > gs
+ && nPart != nGroups && nPart != 1
+ && ((nGroups-nPart) % 2 == 1)) {
+ aFreq -= s->mtfFreq[ge];
+ ge--;
+ }
+
+ if (s->verbosity >= 3)
+ VPrintf5( " initial group %d, [%d .. %d], "
+ "has %d syms (%4.1f%%)\n",
+ nPart, gs, ge, aFreq,
+ (100.0 * (float)aFreq) / (float)(s->nMTF) );
+
+ for (v = 0; v < alphaSize; v++)
+ if (v >= gs && v <= ge)
+ s->len[nPart-1][v] = BZ_LESSER_ICOST; else
+ s->len[nPart-1][v] = BZ_GREATER_ICOST;
+
+ nPart--;
+ gs = ge+1;
+ remF -= aFreq;
+ }
+ }
+
+ /*---
+ Iterate up to BZ_N_ITERS times to improve the tables.
+ ---*/
+ for (iter = 0; iter < BZ_N_ITERS; iter++) {
+
+ for (t = 0; t < nGroups; t++) fave[t] = 0;
+
+ for (t = 0; t < nGroups; t++)
+ for (v = 0; v < alphaSize; v++)
+ s->rfreq[t][v] = 0;
+
+ nSelectors = 0;
+ totc = 0;
+ gs = 0;
+ while (True) {
+
+ /*--- Set group start & end marks. --*/
+ if (gs >= s->nMTF) break;
+ ge = gs + BZ_G_SIZE - 1;
+ if (ge >= s->nMTF) ge = s->nMTF-1;
+
+ /*--
+ Calculate the cost of this group as coded
+ by each of the coding tables.
+ --*/
+ for (t = 0; t < nGroups; t++) cost[t] = 0;
+
+ if (nGroups == 6) {
+ register UInt16 cost0, cost1, cost2, cost3, cost4, cost5;
+ cost0 = cost1 = cost2 = cost3 = cost4 = cost5 = 0;
+ for (i = gs; i <= ge; i++) {
+ UInt16 icv = mtfv[i];
+ cost0 += s->len[0][icv];
+ cost1 += s->len[1][icv];
+ cost2 += s->len[2][icv];
+ cost3 += s->len[3][icv];
+ cost4 += s->len[4][icv];
+ cost5 += s->len[5][icv];
+ }
+ cost[0] = cost0; cost[1] = cost1; cost[2] = cost2;
+ cost[3] = cost3; cost[4] = cost4; cost[5] = cost5;
+ } else {
+ for (i = gs; i <= ge; i++) {
+ UInt16 icv = mtfv[i];
+ for (t = 0; t < nGroups; t++) cost[t] += s->len[t][icv];
+ }
+ }
+
+ /*--
+ Find the coding table which is best for this group,
+ and record its identity in the selector table.
+ --*/
+ bc = 999999999; bt = -1;
+ for (t = 0; t < nGroups; t++)
+ if (cost[t] < bc) { bc = cost[t]; bt = t; };
+ totc += bc;
+ fave[bt]++;
+ s->selector[nSelectors] = bt;
+ nSelectors++;
+
+ /*--
+ Increment the symbol frequencies for the selected table.
+ --*/
+ for (i = gs; i <= ge; i++)
+ s->rfreq[bt][ mtfv[i] ]++;
+
+ gs = ge+1;
+ }
+ if (s->verbosity >= 3) {
+ VPrintf2 ( " pass %d: size is %d, grp uses are ",
+ iter+1, totc/8 );
+ for (t = 0; t < nGroups; t++)
+ VPrintf1 ( "%d ", fave[t] );
+ VPrintf0 ( "\n" );
+ }
+
+ /*--
+ Recompute the tables based on the accumulated frequencies.
+ --*/
+ for (t = 0; t < nGroups; t++)
+ hbMakeCodeLengths ( &(s->len[t][0]), &(s->rfreq[t][0]),
+ alphaSize, 20 );
+ }
+
+
+ AssertH( nGroups < 8, 3002 );
+ AssertH( nSelectors < 32768 &&
+ nSelectors <= (2 + (900000 / BZ_G_SIZE)),
+ 3003 );
+
+
+ /*--- Compute MTF values for the selectors. ---*/
+ {
+ UChar pos[BZ_N_GROUPS], ll_i, tmp2, tmp;
+ for (i = 0; i < nGroups; i++) pos[i] = i;
+ for (i = 0; i < nSelectors; i++) {
+ ll_i = s->selector[i];
+ j = 0;
+ tmp = pos[j];
+ while ( ll_i != tmp ) {
+ j++;
+ tmp2 = tmp;
+ tmp = pos[j];
+ pos[j] = tmp2;
+ };
+ pos[0] = tmp;
+ s->selectorMtf[i] = j;
+ }
+ };
+
+ /*--- Assign actual codes for the tables. --*/
+ for (t = 0; t < nGroups; t++) {
+ minLen = 32;
+ maxLen = 0;
+ for (i = 0; i < alphaSize; i++) {
+ if (s->len[t][i] > maxLen) maxLen = s->len[t][i];
+ if (s->len[t][i] < minLen) minLen = s->len[t][i];
+ }
+ AssertH ( !(maxLen > 20), 3004 );
+ AssertH ( !(minLen < 1), 3005 );
+ hbAssignCodes ( &(s->code[t][0]), &(s->len[t][0]),
+ minLen, maxLen, alphaSize );
+ }
+
+ /*--- Transmit the mapping table. ---*/
+ {
+ Bool inUse16[16];
+ for (i = 0; i < 16; i++) {
+ inUse16[i] = False;
+ for (j = 0; j < 16; j++)
+ if (s->inUse[i * 16 + j]) inUse16[i] = True;
+ }
+
+ nBytes = s->numZ;
+ for (i = 0; i < 16; i++)
+ if (inUse16[i]) bsW(s,1,1); else bsW(s,1,0);
+
+ for (i = 0; i < 16; i++)
+ if (inUse16[i])
+ for (j = 0; j < 16; j++) {
+ if (s->inUse[i * 16 + j]) bsW(s,1,1); else bsW(s,1,0);
+ }
+
+ if (s->verbosity >= 3)
+ VPrintf1( " bytes: mapping %d, ", s->numZ-nBytes );
+ }
+
+ /*--- Now the selectors. ---*/
+ nBytes = s->numZ;
+ bsW ( s, 3, nGroups );
+ bsW ( s, 15, nSelectors );
+ for (i = 0; i < nSelectors; i++) {
+ for (j = 0; j < s->selectorMtf[i]; j++) bsW(s,1,1);
+ bsW(s,1,0);
+ }
+ if (s->verbosity >= 3)
+ VPrintf1( "selectors %d, ", s->numZ-nBytes );
+
+ /*--- Now the coding tables. ---*/
+ nBytes = s->numZ;
+
+ for (t = 0; t < nGroups; t++) {
+ Int32 curr = s->len[t][0];
+ bsW ( s, 5, curr );
+ for (i = 0; i < alphaSize; i++) {
+ while (curr < s->len[t][i]) { bsW(s,2,2); curr++; /* 10 */ };
+ while (curr > s->len[t][i]) { bsW(s,2,3); curr--; /* 11 */ };
+ bsW ( s, 1, 0 );
+ }
+ }
+
+ if (s->verbosity >= 3)
+ VPrintf1 ( "code lengths %d, ", s->numZ-nBytes );
+
+ /*--- And finally, the block data proper ---*/
+ nBytes = s->numZ;
+ selCtr = 0;
+ gs = 0;
+ while (True) {
+ if (gs >= s->nMTF) break;
+ ge = gs + BZ_G_SIZE - 1;
+ if (ge >= s->nMTF) ge = s->nMTF-1;
+ for (i = gs; i <= ge; i++) {
+ AssertH ( s->selector[selCtr] < nGroups, 3006 );
+ bsW ( s,
+ s->len [s->selector[selCtr]] [mtfv[i]],
+ s->code [s->selector[selCtr]] [mtfv[i]] );
+ }
+
+ gs = ge+1;
+ selCtr++;
+ }
+ AssertH( selCtr == nSelectors, 3007 );
+
+ if (s->verbosity >= 3)
+ VPrintf1( "codes %d\n", s->numZ-nBytes );
+}
+
+
+/*---------------------------------------------------*/
+void compressBlock ( EState* s, Bool is_last_block )
+{
+ if (s->nblock > 0) {
+
+ BZ_FINALISE_CRC ( s->blockCRC );
+ s->combinedCRC = (s->combinedCRC << 1) | (s->combinedCRC >> 31);
+ s->combinedCRC ^= s->blockCRC;
+ if (s->blockNo > 1) s->numZ = 0;
+
+ if (s->verbosity >= 2)
+ VPrintf4( " block %d: crc = 0x%8x, "
+ "combined CRC = 0x%8x, size = %d\n",
+ s->blockNo, s->blockCRC, s->combinedCRC, s->nblock );
+
+ blockSort ( s );
+ }
+
+ s->zbits = (UChar*) (&((UInt16*)s->arr2)[s->nblock]);
+
+ /*-- If this is the first block, create the stream header. --*/
+ if (s->blockNo == 1) {
+ bsInitWrite ( s );
+ bsPutUChar ( s, 'B' );
+ bsPutUChar ( s, 'Z' );
+ bsPutUChar ( s, 'h' );
+ bsPutUChar ( s, (UChar)('0' + s->blockSize100k) );
+ }
+
+ if (s->nblock > 0) {
+
+ bsPutUChar ( s, 0x31 ); bsPutUChar ( s, 0x41 );
+ bsPutUChar ( s, 0x59 ); bsPutUChar ( s, 0x26 );
+ bsPutUChar ( s, 0x53 ); bsPutUChar ( s, 0x59 );
+
+ /*-- Now the block's CRC, so it is in a known place. --*/
+ bsPutUInt32 ( s, s->blockCRC );
+
+ /*--
+ Now a single bit indicating (non-)randomisation.
+ As of version 0.9.5, we use a better sorting algorithm
+ which makes randomisation unnecessary. So always set
+ the randomised bit to 'no'. Of course, the decoder
+ still needs to be able to handle randomised blocks
+ so as to maintain backwards compatibility with
+ older versions of bzip2.
+ --*/
+ bsW(s,1,0);
+
+ bsW ( s, 24, s->origPtr );
+ generateMTFValues ( s );
+ sendMTFValues ( s );
+ }
+
+
+ /*-- If this is the last block, add the stream trailer. --*/
+ if (is_last_block) {
+
+ bsPutUChar ( s, 0x17 ); bsPutUChar ( s, 0x72 );
+ bsPutUChar ( s, 0x45 ); bsPutUChar ( s, 0x38 );
+ bsPutUChar ( s, 0x50 ); bsPutUChar ( s, 0x90 );
+ bsPutUInt32 ( s, s->combinedCRC );
+ if (s->verbosity >= 2)
+ VPrintf1( " final combined CRC = 0x%x\n ", s->combinedCRC );
+ bsFinishWrite ( s );
+ }
+}
+
+
+/*-------------------------------------------------------------*/
+/*--- end compress.c ---*/
+/*-------------------------------------------------------------*/
--- /dev/null
+
+/*-------------------------------------------------------------*/
+/*--- Table for doing CRCs ---*/
+/*--- crctable.c ---*/
+/*-------------------------------------------------------------*/
+
+/*--
+ This file is a part of bzip2 and/or libbzip2, a program and
+ library for lossless, block-sorting data compression.
+
+ Copyright (C) 1996-1999 Julian R Seward. All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+
+ 1. Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+
+ 2. The origin of this software must not be misrepresented; you must
+ not claim that you wrote the original software. If you use this
+ software in a product, an acknowledgment in the product
+ documentation would be appreciated but is not required.
+
+ 3. Altered source versions must be plainly marked as such, and must
+ not be misrepresented as being the original software.
+
+ 4. The name of the author may not be used to endorse or promote
+ products derived from this software without specific prior written
+ permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
+ OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ Julian Seward, Cambridge, UK.
+ jseward@acm.org
+ bzip2/libbzip2 version 0.9.5 of 24 May 1999
+
+ This program is based on (at least) the work of:
+ Mike Burrows
+ David Wheeler
+ Peter Fenwick
+ Alistair Moffat
+ Radford Neal
+ Ian H. Witten
+ Robert Sedgewick
+ Jon L. Bentley
+
+ For more information on these sources, see the manual.
+--*/
+
+
+#include "bzlib_private.h"
+
+/*--
+ I think this is an implementation of the AUTODIN-II,
+ Ethernet & FDDI 32-bit CRC standard. Vaguely derived
+ from code by Rob Warnock, in Section 51 of the
+ comp.compression FAQ.
+--*/
+
+UInt32 crc32Table[256] = {
+
+ /*-- Ugly, innit? --*/
+
+ 0x00000000L, 0x04c11db7L, 0x09823b6eL, 0x0d4326d9L,
+ 0x130476dcL, 0x17c56b6bL, 0x1a864db2L, 0x1e475005L,
+ 0x2608edb8L, 0x22c9f00fL, 0x2f8ad6d6L, 0x2b4bcb61L,
+ 0x350c9b64L, 0x31cd86d3L, 0x3c8ea00aL, 0x384fbdbdL,
+ 0x4c11db70L, 0x48d0c6c7L, 0x4593e01eL, 0x4152fda9L,
+ 0x5f15adacL, 0x5bd4b01bL, 0x569796c2L, 0x52568b75L,
+ 0x6a1936c8L, 0x6ed82b7fL, 0x639b0da6L, 0x675a1011L,
+ 0x791d4014L, 0x7ddc5da3L, 0x709f7b7aL, 0x745e66cdL,
+ 0x9823b6e0L, 0x9ce2ab57L, 0x91a18d8eL, 0x95609039L,
+ 0x8b27c03cL, 0x8fe6dd8bL, 0x82a5fb52L, 0x8664e6e5L,
+ 0xbe2b5b58L, 0xbaea46efL, 0xb7a96036L, 0xb3687d81L,
+ 0xad2f2d84L, 0xa9ee3033L, 0xa4ad16eaL, 0xa06c0b5dL,
+ 0xd4326d90L, 0xd0f37027L, 0xddb056feL, 0xd9714b49L,
+ 0xc7361b4cL, 0xc3f706fbL, 0xceb42022L, 0xca753d95L,
+ 0xf23a8028L, 0xf6fb9d9fL, 0xfbb8bb46L, 0xff79a6f1L,
+ 0xe13ef6f4L, 0xe5ffeb43L, 0xe8bccd9aL, 0xec7dd02dL,
+ 0x34867077L, 0x30476dc0L, 0x3d044b19L, 0x39c556aeL,
+ 0x278206abL, 0x23431b1cL, 0x2e003dc5L, 0x2ac12072L,
+ 0x128e9dcfL, 0x164f8078L, 0x1b0ca6a1L, 0x1fcdbb16L,
+ 0x018aeb13L, 0x054bf6a4L, 0x0808d07dL, 0x0cc9cdcaL,
+ 0x7897ab07L, 0x7c56b6b0L, 0x71159069L, 0x75d48ddeL,
+ 0x6b93dddbL, 0x6f52c06cL, 0x6211e6b5L, 0x66d0fb02L,
+ 0x5e9f46bfL, 0x5a5e5b08L, 0x571d7dd1L, 0x53dc6066L,
+ 0x4d9b3063L, 0x495a2dd4L, 0x44190b0dL, 0x40d816baL,
+ 0xaca5c697L, 0xa864db20L, 0xa527fdf9L, 0xa1e6e04eL,
+ 0xbfa1b04bL, 0xbb60adfcL, 0xb6238b25L, 0xb2e29692L,
+ 0x8aad2b2fL, 0x8e6c3698L, 0x832f1041L, 0x87ee0df6L,
+ 0x99a95df3L, 0x9d684044L, 0x902b669dL, 0x94ea7b2aL,
+ 0xe0b41de7L, 0xe4750050L, 0xe9362689L, 0xedf73b3eL,
+ 0xf3b06b3bL, 0xf771768cL, 0xfa325055L, 0xfef34de2L,
+ 0xc6bcf05fL, 0xc27dede8L, 0xcf3ecb31L, 0xcbffd686L,
+ 0xd5b88683L, 0xd1799b34L, 0xdc3abdedL, 0xd8fba05aL,
+ 0x690ce0eeL, 0x6dcdfd59L, 0x608edb80L, 0x644fc637L,
+ 0x7a089632L, 0x7ec98b85L, 0x738aad5cL, 0x774bb0ebL,
+ 0x4f040d56L, 0x4bc510e1L, 0x46863638L, 0x42472b8fL,
+ 0x5c007b8aL, 0x58c1663dL, 0x558240e4L, 0x51435d53L,
+ 0x251d3b9eL, 0x21dc2629L, 0x2c9f00f0L, 0x285e1d47L,
+ 0x36194d42L, 0x32d850f5L, 0x3f9b762cL, 0x3b5a6b9bL,
+ 0x0315d626L, 0x07d4cb91L, 0x0a97ed48L, 0x0e56f0ffL,
+ 0x1011a0faL, 0x14d0bd4dL, 0x19939b94L, 0x1d528623L,
+ 0xf12f560eL, 0xf5ee4bb9L, 0xf8ad6d60L, 0xfc6c70d7L,
+ 0xe22b20d2L, 0xe6ea3d65L, 0xeba91bbcL, 0xef68060bL,
+ 0xd727bbb6L, 0xd3e6a601L, 0xdea580d8L, 0xda649d6fL,
+ 0xc423cd6aL, 0xc0e2d0ddL, 0xcda1f604L, 0xc960ebb3L,
+ 0xbd3e8d7eL, 0xb9ff90c9L, 0xb4bcb610L, 0xb07daba7L,
+ 0xae3afba2L, 0xaafbe615L, 0xa7b8c0ccL, 0xa379dd7bL,
+ 0x9b3660c6L, 0x9ff77d71L, 0x92b45ba8L, 0x9675461fL,
+ 0x8832161aL, 0x8cf30badL, 0x81b02d74L, 0x857130c3L,
+ 0x5d8a9099L, 0x594b8d2eL, 0x5408abf7L, 0x50c9b640L,
+ 0x4e8ee645L, 0x4a4ffbf2L, 0x470cdd2bL, 0x43cdc09cL,
+ 0x7b827d21L, 0x7f436096L, 0x7200464fL, 0x76c15bf8L,
+ 0x68860bfdL, 0x6c47164aL, 0x61043093L, 0x65c52d24L,
+ 0x119b4be9L, 0x155a565eL, 0x18197087L, 0x1cd86d30L,
+ 0x029f3d35L, 0x065e2082L, 0x0b1d065bL, 0x0fdc1becL,
+ 0x3793a651L, 0x3352bbe6L, 0x3e119d3fL, 0x3ad08088L,
+ 0x2497d08dL, 0x2056cd3aL, 0x2d15ebe3L, 0x29d4f654L,
+ 0xc5a92679L, 0xc1683bceL, 0xcc2b1d17L, 0xc8ea00a0L,
+ 0xd6ad50a5L, 0xd26c4d12L, 0xdf2f6bcbL, 0xdbee767cL,
+ 0xe3a1cbc1L, 0xe760d676L, 0xea23f0afL, 0xeee2ed18L,
+ 0xf0a5bd1dL, 0xf464a0aaL, 0xf9278673L, 0xfde69bc4L,
+ 0x89b8fd09L, 0x8d79e0beL, 0x803ac667L, 0x84fbdbd0L,
+ 0x9abc8bd5L, 0x9e7d9662L, 0x933eb0bbL, 0x97ffad0cL,
+ 0xafb010b1L, 0xab710d06L, 0xa6322bdfL, 0xa2f33668L,
+ 0xbcb4666dL, 0xb8757bdaL, 0xb5365d03L, 0xb1f740b4L
+};
+
+
+/*-------------------------------------------------------------*/
+/*--- end crctable.c ---*/
+/*-------------------------------------------------------------*/
--- /dev/null
+
+/*-------------------------------------------------------------*/
+/*--- Huffman coding low-level stuff ---*/
+/*--- huffman.c ---*/
+/*-------------------------------------------------------------*/
+
+/*--
+ This file is a part of bzip2 and/or libbzip2, a program and
+ library for lossless, block-sorting data compression.
+
+ Copyright (C) 1996-1999 Julian R Seward. All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+
+ 1. Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+
+ 2. The origin of this software must not be misrepresented; you must
+ not claim that you wrote the original software. If you use this
+ software in a product, an acknowledgment in the product
+ documentation would be appreciated but is not required.
+
+ 3. Altered source versions must be plainly marked as such, and must
+ not be misrepresented as being the original software.
+
+ 4. The name of the author may not be used to endorse or promote
+ products derived from this software without specific prior written
+ permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
+ OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ Julian Seward, Cambridge, UK.
+ jseward@acm.org
+ bzip2/libbzip2 version 0.9.5 of 24 May 1999
+
+ This program is based on (at least) the work of:
+ Mike Burrows
+ David Wheeler
+ Peter Fenwick
+ Alistair Moffat
+ Radford Neal
+ Ian H. Witten
+ Robert Sedgewick
+ Jon L. Bentley
+
+ For more information on these sources, see the manual.
+--*/
+
+
+#include "bzlib_private.h"
+
+/*---------------------------------------------------*/
+#define WEIGHTOF(zz0) ((zz0) & 0xffffff00)
+#define DEPTHOF(zz1) ((zz1) & 0x000000ff)
+#define MYMAX(zz2,zz3) ((zz2) > (zz3) ? (zz2) : (zz3))
+
+#define ADDWEIGHTS(zw1,zw2) \
+ (WEIGHTOF(zw1)+WEIGHTOF(zw2)) | \
+ (1 + MYMAX(DEPTHOF(zw1),DEPTHOF(zw2)))
+
+#define UPHEAP(z) \
+{ \
+ Int32 zz, tmp; \
+ zz = z; tmp = heap[zz]; \
+ while (weight[tmp] < weight[heap[zz >> 1]]) { \
+ heap[zz] = heap[zz >> 1]; \
+ zz >>= 1; \
+ } \
+ heap[zz] = tmp; \
+}
+
+#define DOWNHEAP(z) \
+{ \
+ Int32 zz, yy, tmp; \
+ zz = z; tmp = heap[zz]; \
+ while (True) { \
+ yy = zz << 1; \
+ if (yy > nHeap) break; \
+ if (yy < nHeap && \
+ weight[heap[yy+1]] < weight[heap[yy]]) \
+ yy++; \
+ if (weight[tmp] < weight[heap[yy]]) break; \
+ heap[zz] = heap[yy]; \
+ zz = yy; \
+ } \
+ heap[zz] = tmp; \
+}
+
+
+/*---------------------------------------------------*/
+void hbMakeCodeLengths ( UChar *len,
+ Int32 *freq,
+ Int32 alphaSize,
+ Int32 maxLen )
+{
+ /*--
+ Nodes and heap entries run from 1. Entry 0
+ for both the heap and nodes is a sentinel.
+ --*/
+ Int32 nNodes, nHeap, n1, n2, i, j, k;
+ Bool tooLong;
+
+ Int32 heap [ BZ_MAX_ALPHA_SIZE + 2 ];
+ Int32 weight [ BZ_MAX_ALPHA_SIZE * 2 ];
+ Int32 parent [ BZ_MAX_ALPHA_SIZE * 2 ];
+
+ for (i = 0; i < alphaSize; i++)
+ weight[i+1] = (freq[i] == 0 ? 1 : freq[i]) << 8;
+
+ while (True) {
+
+ nNodes = alphaSize;
+ nHeap = 0;
+
+ heap[0] = 0;
+ weight[0] = 0;
+ parent[0] = -2;
+
+ for (i = 1; i <= alphaSize; i++) {
+ parent[i] = -1;
+ nHeap++;
+ heap[nHeap] = i;
+ UPHEAP(nHeap);
+ }
+
+ AssertH( nHeap < (BZ_MAX_ALPHA_SIZE+2), 2001 );
+
+ while (nHeap > 1) {
+ n1 = heap[1]; heap[1] = heap[nHeap]; nHeap--; DOWNHEAP(1);
+ n2 = heap[1]; heap[1] = heap[nHeap]; nHeap--; DOWNHEAP(1);
+ nNodes++;
+ parent[n1] = parent[n2] = nNodes;
+ weight[nNodes] = ADDWEIGHTS(weight[n1], weight[n2]);
+ parent[nNodes] = -1;
+ nHeap++;
+ heap[nHeap] = nNodes;
+ UPHEAP(nHeap);
+ }
+
+ AssertH( nNodes < (BZ_MAX_ALPHA_SIZE * 2), 2002 );
+
+ tooLong = False;
+ for (i = 1; i <= alphaSize; i++) {
+ j = 0;
+ k = i;
+ while (parent[k] >= 0) { k = parent[k]; j++; }
+ len[i-1] = j;
+ if (j > maxLen) tooLong = True;
+ }
+
+ if (! tooLong) break;
+
+ for (i = 1; i < alphaSize; i++) {
+ j = weight[i] >> 8;
+ j = 1 + (j / 2);
+ weight[i] = j << 8;
+ }
+ }
+}
+
+
+/*---------------------------------------------------*/
+void hbAssignCodes ( Int32 *code,
+ UChar *length,
+ Int32 minLen,
+ Int32 maxLen,
+ Int32 alphaSize )
+{
+ Int32 n, vec, i;
+
+ vec = 0;
+ for (n = minLen; n <= maxLen; n++) {
+ for (i = 0; i < alphaSize; i++)
+ if (length[i] == n) { code[i] = vec; vec++; };
+ vec <<= 1;
+ }
+}
+
+
+/*---------------------------------------------------*/
+void hbCreateDecodeTables ( Int32 *limit,
+ Int32 *base,
+ Int32 *perm,
+ UChar *length,
+ Int32 minLen,
+ Int32 maxLen,
+ Int32 alphaSize )
+{
+ Int32 pp, i, j, vec;
+
+ pp = 0;
+ for (i = minLen; i <= maxLen; i++)
+ for (j = 0; j < alphaSize; j++)
+ if (length[j] == i) { perm[pp] = j; pp++; };
+
+ for (i = 0; i < BZ_MAX_CODE_LEN; i++) base[i] = 0;
+ for (i = 0; i < alphaSize; i++) base[length[i]+1]++;
+
+ for (i = 1; i < BZ_MAX_CODE_LEN; i++) base[i] += base[i-1];
+
+ for (i = 0; i < BZ_MAX_CODE_LEN; i++) limit[i] = 0;
+ vec = 0;
+
+ for (i = minLen; i <= maxLen; i++) {
+ vec += (base[i+1] - base[i]);
+ limit[i] = vec-1;
+ vec <<= 1;
+ }
+ for (i = minLen + 1; i <= maxLen; i++)
+ base[i] = ((limit[i-1] + 1) << 1) - base[i];
+}
+
+
+/*-------------------------------------------------------------*/
+/*--- end huffman.c ---*/
+/*-------------------------------------------------------------*/
--- /dev/null
+
+/*-------------------------------------------------------------*/
+/*--- Table for randomising repetitive blocks ---*/
+/*--- randtable.c ---*/
+/*-------------------------------------------------------------*/
+
+/*--
+ This file is a part of bzip2 and/or libbzip2, a program and
+ library for lossless, block-sorting data compression.
+
+ Copyright (C) 1996-1999 Julian R Seward. All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+
+ 1. Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+
+ 2. The origin of this software must not be misrepresented; you must
+ not claim that you wrote the original software. If you use this
+ software in a product, an acknowledgment in the product
+ documentation would be appreciated but is not required.
+
+ 3. Altered source versions must be plainly marked as such, and must
+ not be misrepresented as being the original software.
+
+ 4. The name of the author may not be used to endorse or promote
+ products derived from this software without specific prior written
+ permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
+ OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ Julian Seward, Cambridge, UK.
+ jseward@acm.org
+ bzip2/libbzip2 version 0.9.5 of 24 May 1999
+
+ This program is based on (at least) the work of:
+ Mike Burrows
+ David Wheeler
+ Peter Fenwick
+ Alistair Moffat
+ Radford Neal
+ Ian H. Witten
+ Robert Sedgewick
+ Jon L. Bentley
+
+ For more information on these sources, see the manual.
+--*/
+
+
+#include "bzlib_private.h"
+
+
+/*---------------------------------------------*/
+Int32 rNums[512] = {
+ 619, 720, 127, 481, 931, 816, 813, 233, 566, 247,
+ 985, 724, 205, 454, 863, 491, 741, 242, 949, 214,
+ 733, 859, 335, 708, 621, 574, 73, 654, 730, 472,
+ 419, 436, 278, 496, 867, 210, 399, 680, 480, 51,
+ 878, 465, 811, 169, 869, 675, 611, 697, 867, 561,
+ 862, 687, 507, 283, 482, 129, 807, 591, 733, 623,
+ 150, 238, 59, 379, 684, 877, 625, 169, 643, 105,
+ 170, 607, 520, 932, 727, 476, 693, 425, 174, 647,
+ 73, 122, 335, 530, 442, 853, 695, 249, 445, 515,
+ 909, 545, 703, 919, 874, 474, 882, 500, 594, 612,
+ 641, 801, 220, 162, 819, 984, 589, 513, 495, 799,
+ 161, 604, 958, 533, 221, 400, 386, 867, 600, 782,
+ 382, 596, 414, 171, 516, 375, 682, 485, 911, 276,
+ 98, 553, 163, 354, 666, 933, 424, 341, 533, 870,
+ 227, 730, 475, 186, 263, 647, 537, 686, 600, 224,
+ 469, 68, 770, 919, 190, 373, 294, 822, 808, 206,
+ 184, 943, 795, 384, 383, 461, 404, 758, 839, 887,
+ 715, 67, 618, 276, 204, 918, 873, 777, 604, 560,
+ 951, 160, 578, 722, 79, 804, 96, 409, 713, 940,
+ 652, 934, 970, 447, 318, 353, 859, 672, 112, 785,
+ 645, 863, 803, 350, 139, 93, 354, 99, 820, 908,
+ 609, 772, 154, 274, 580, 184, 79, 626, 630, 742,
+ 653, 282, 762, 623, 680, 81, 927, 626, 789, 125,
+ 411, 521, 938, 300, 821, 78, 343, 175, 128, 250,
+ 170, 774, 972, 275, 999, 639, 495, 78, 352, 126,
+ 857, 956, 358, 619, 580, 124, 737, 594, 701, 612,
+ 669, 112, 134, 694, 363, 992, 809, 743, 168, 974,
+ 944, 375, 748, 52, 600, 747, 642, 182, 862, 81,
+ 344, 805, 988, 739, 511, 655, 814, 334, 249, 515,
+ 897, 955, 664, 981, 649, 113, 974, 459, 893, 228,
+ 433, 837, 553, 268, 926, 240, 102, 654, 459, 51,
+ 686, 754, 806, 760, 493, 403, 415, 394, 687, 700,
+ 946, 670, 656, 610, 738, 392, 760, 799, 887, 653,
+ 978, 321, 576, 617, 626, 502, 894, 679, 243, 440,
+ 680, 879, 194, 572, 640, 724, 926, 56, 204, 700,
+ 707, 151, 457, 449, 797, 195, 791, 558, 945, 679,
+ 297, 59, 87, 824, 713, 663, 412, 693, 342, 606,
+ 134, 108, 571, 364, 631, 212, 174, 643, 304, 329,
+ 343, 97, 430, 751, 497, 314, 983, 374, 822, 928,
+ 140, 206, 73, 263, 980, 736, 876, 478, 430, 305,
+ 170, 514, 364, 692, 829, 82, 855, 953, 676, 246,
+ 369, 970, 294, 750, 807, 827, 150, 790, 288, 923,
+ 804, 378, 215, 828, 592, 281, 565, 555, 710, 82,
+ 896, 831, 547, 261, 524, 462, 293, 465, 502, 56,
+ 661, 821, 976, 991, 658, 869, 905, 758, 745, 193,
+ 768, 550, 608, 933, 378, 286, 215, 979, 792, 961,
+ 61, 688, 793, 644, 986, 403, 106, 366, 905, 644,
+ 372, 567, 466, 434, 645, 210, 389, 550, 919, 135,
+ 780, 773, 635, 389, 707, 100, 626, 958, 165, 504,
+ 920, 176, 193, 713, 857, 265, 203, 50, 668, 108,
+ 645, 990, 626, 197, 510, 357, 358, 850, 858, 364,
+ 936, 638
+};
+
+
+/*-------------------------------------------------------------*/
+/*--- end randtable.c ---*/
+/*-------------------------------------------------------------*/
--- /dev/null
+/*
+ * Authors: Faidon Liambotis <paravoid@debian.org>
+ * Josh Triplett <josh@joshtriplett.org>
+ *
+ * This is a zlib-based gzip that is heavily based on NetBSD's gzip,
+ * developed by Matthew R. Green.
+ *
+ * This is suited for gzip regeneration and is part of pristine-tar.
+ * As such, it adds some extra options which are needed to successfully
+ * reproduce the gzips out there and removes features of the original
+ * implementation that were not relevant (e.g. decompression)
+ *
+ * It also has a mode to generate old bzip2 files.
+ *
+ * Copyright (c) 1997, 1998, 2003, 2004, 2006 Matthew R. Green
+ * Copyright (c) 2007 Faidon Liambotis
+ * Copyright (c) 2008 Josh Triplett
+ * Copyright (c) 2010 Joey Hess
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * gzip.c -- GPL free gzip using zlib.
+ *
+ * RFC 1950 covers the zlib format
+ * RFC 1951 covers the deflate format
+ * RFC 1952 covers the gzip format
+ *
+ */
+
+#define _GNU_SOURCE
+
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+
+#include <inttypes.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <zlib.h>
+#include <libgen.h>
+#include <stdarg.h>
+#include <getopt.h>
+#include <time.h>
+
+extern void gnuzip(int in, int out, char *origname, unsigned long timestamp, int level, int osflag, int rsync, int newrsync);
+extern void old_bzip2(int level);
+
+#define BUFLEN (64 * 1024)
+
+#define GZIP_MAGIC0 0x1F
+#define GZIP_MAGIC1 0x8B
+
+#define HEAD_CRC 0x02
+#define EXTRA_FIELD 0x04
+#define ORIG_NAME 0x08
+#define COMMENT 0x10
+
+#define GZIP_OS_UNIX 3 /* Unix */
+#define GZIP_OS_NTFS 11 /* NTFS */
+
+static const char gzip_version[] = "zgz 20100613 based on NetBSD gzip 20060927, GNU gzip 1.3.12, and bzip2 0.9.5d";
+
+static const char gzip_copyright[] = \
+" Authors: Faidon Liambotis <paravoid@debian.org>\n"
+" Josh Triplett <josh@joshtriplett.org>\n"
+"\n"
+" Copyright (c) 1997, 1998, 2003, 2004, 2006 Matthew R. Green\n"
+" Copyright (c) 2007 Faidon Liambotis\n"
+" Copyright (c) 2008 Josh Triplett\n"
+" * All rights reserved.\n"
+" *\n"
+" * Redistribution and use in source and binary forms, with or without\n"
+" * modification, are permitted provided that the following conditions\n"
+" * are met:\n"
+" * 1. Redistributions of source code must retain the above copyright\n"
+" * notice, this list of conditions and the following disclaimer.\n"
+" * 2. Redistributions in binary form must reproduce the above copyright\n"
+" * notice, this list of conditions and the following disclaimer in the\n"
+" * documentation and/or other materials provided with the distribution.\n"
+" * 3. The name of the author may not be used to endorse or promote products\n"
+" * derived from this software without specific prior written permission.\n"
+" *\n"
+" * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR\n"
+" * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES\n"
+" * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.\n"
+" * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,\n"
+" * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,\n"
+" * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;\n"
+" * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED\n"
+" * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,\n"
+" * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\n"
+" * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\n"
+" * SUCH DAMAGE.";
+
+static int qflag; /* quiet mode */
+
+static void maybe_err(const char *fmt, ...)
+ __attribute__((__format__(__printf__, 1, 2),noreturn));
+static void maybe_errx(const char *fmt, ...)
+ __attribute__((__format__(__printf__, 1, 2),noreturn));
+static void gz_compress(int, int, const char *, uint32_t, int, int, int, int, int);
+static void usage(void);
+static void display_version(void);
+static void display_license(void);
+static void shamble(char *, int);
+static void rebrain(char *, char *, int);
+
+int main(int, char **p);
+
+static const struct option longopts[] = {
+ { "stdout", no_argument, 0, 'c' },
+ { "to-stdout", no_argument, 0, 'c' },
+ { "decompress", no_argument, 0, 'd' },
+ { "uncompress", no_argument, 0, 'd' },
+ { "force", no_argument, 0, 'f' },
+ { "help", no_argument, 0, 'h' },
+ { "no-name", no_argument, 0, 'n' },
+ { "name", no_argument, 0, 'N' },
+ { "quiet", no_argument, 0, 'q' },
+ { "fast", no_argument, 0, '1' },
+ { "best", no_argument, 0, '9' },
+ { "ascii", no_argument, 0, 'a' },
+ /* new options */
+ { "gnu", no_argument, 0, 'G' },
+ { "old-bzip2", no_argument, 0, 'O' },
+ { "suse-bzip2", no_argument, 0, 'S' },
+ { "suse-pbzip2", no_argument, 0, 'P' },
+ { "zlib", no_argument, 0, 'Z' },
+ { "rsyncable", no_argument, 0, 'R' },
+ { "new-rsyncable", no_argument, 0, 'r' },
+ { "no-timestamp", no_argument, 0, 'm' },
+ { "force-timestamp", no_argument, 0, 'M' },
+ { "timestamp", required_argument, 0, 'T' },
+ { "osflag", required_argument, 0, 's' },
+ { "original-name", required_argument, 0, 'o' },
+ { "filename", required_argument, 0, 'F' },
+ { "quirk", required_argument, 0, 'k' },
+ /* end */
+ { "version", no_argument, 0, 'V' },
+ { "license", no_argument, 0, 'L' },
+ { NULL, no_argument, 0, 0 },
+};
+
+int
+main(int argc, char **argv)
+{
+ const char *progname = argv[0];
+ int gnu = 0;
+ int bzold = 0;
+ int bzsuse = 0;
+ int pbzsuse = 0;
+ int quirks = 0;
+ char *origname = NULL;
+ uint32_t timestamp = 0;
+ int memlevel = 8; /* zlib's default */
+ int nflag = 0;
+ int mflag = 0;
+ int fflag = 0;
+ int xflag = -1;
+ int ntfs_quirk = 0;
+ int level = 6;
+ int osflag = GZIP_OS_UNIX;
+ int rsync = 0;
+ int new_rsync = 0;
+ int ch;
+
+ if (strcmp(progname, "gunzip") == 0 ||
+ strcmp(progname, "zcat") == 0 ||
+ strcmp(progname, "gzcat") == 0) {
+ fprintf(stderr, "%s: decompression is not supported on this version\n", progname);
+ usage();
+ }
+
+#define OPT_LIST "123456789acdfhF:GLNnMmqRrT:Vo:k:s:ZOSP"
+
+ while ((ch = getopt_long(argc, argv, OPT_LIST, longopts, NULL)) != -1) {
+ switch (ch) {
+ case 'G':
+ gnu = 1;
+ break;
+ case 'O':
+ bzold = 1;
+ break;
+ case 'S':
+ bzsuse = 1;
+ break;
+ case 'P':
+ pbzsuse = 1;
+ break;
+ case 'Z':
+ break;
+ case '1': case '2': case '3':
+ case '4': case '5': case '6':
+ case '7': case '8': case '9':
+ level = ch - '0';
+ break;
+ case 'c':
+ /* Ignored for compatibility; zgz always uses -c */
+ break;
+ case 'f':
+ fflag = 1;
+ break;
+ case 'N':
+ nflag = 0;
+ break;
+ case 'n':
+ nflag = 1;
+ /* no break, n implies m */
+ case 'm':
+ mflag = 1;
+ break;
+ case 'M':
+ mflag = 0;
+ break;
+ case 'q':
+ qflag = 1;
+ break;
+ case 's':
+ osflag = atoi(optarg);
+ break;
+ case 'F':
+ case 'o':
+ origname = optarg;
+ break;
+ case 'k':
+ quirks = 1;
+ if (strcmp(optarg, "buggy-bsd") == 0) {
+ /* certain archives made with older versions of
+ * BSD variants of gzip */
+
+ /* no name or timestamp information */
+ nflag = 1;
+ mflag = 1;
+ /* maximum compression but without indicating so */
+ level = 9;
+ xflag = 0;
+ } else if (strcmp(optarg, "ntfs") == 0) {
+ ntfs_quirk = 1;
+ /* no name or timestamp information */
+ nflag = 1;
+ mflag = 1;
+ /* osflag is NTFS */
+ osflag = GZIP_OS_NTFS;
+ } else if (strcmp(optarg, "perl") == 0) {
+ /* Perl's Compress::Raw::Zlib */
+ memlevel = 9;
+
+ /* no name or timestamp information */
+ nflag = 1;
+ mflag = 1;
+ /* maximum compression but without indicating so */
+ level = 9;
+ xflag = 0;
+ } else {
+ fprintf(stderr, "%s: unknown quirk!\n", progname);
+ usage();
+ }
+ break;
+ case 'T':
+ timestamp = atoi(optarg);
+ break;
+ case 'R':
+ rsync = 1;
+ break;
+ case 'r':
+ new_rsync = 1;
+ break;
+ case 'd':
+ fprintf(stderr, "%s: decompression is not supported on this version\n", progname);
+ usage();
+ break;
+ case 'a':
+ fprintf(stderr, "%s: option --ascii ignored on this version\n", progname);
+ break;
+ case 'V':
+ display_version();
+ /* NOTREACHED */
+ case 'L':
+ display_license();
+ /* NOT REACHED */
+ default:
+ usage();
+ /* NOTREACHED */
+ }
+ }
+ argv += optind;
+ argc -= optind;
+
+ if (argc != 0) {
+ fprintf(stderr, "%s: filenames not supported; use stdin and stdout\n", progname);
+ return 1;
+ }
+
+ if (fflag == 0 && isatty(STDOUT_FILENO))
+ maybe_errx("standard output is a terminal -- ignoring");
+
+ if (nflag)
+ origname = NULL;
+ if (mflag)
+ timestamp = 0;
+
+ if (gnu) {
+ if (quirks) {
+ fprintf(stderr, "%s: quirks not supported with --gnu\n", progname);
+ return 1;
+ }
+ gnuzip(STDIN_FILENO, STDOUT_FILENO, origname, timestamp, level, osflag, rsync, new_rsync);
+ } else if (bzold) {
+ if (quirks) {
+ fprintf(stderr, "%s: quirks not supported with --old-bzip2\n", progname);
+ return 1;
+ }
+ old_bzip2(level);
+ } else if (bzsuse) {
+ shamble("suse-bzip2/bzip2", level);
+ } else if (pbzsuse) {
+ rebrain("suse-bzip2", "pbzip2", level);
+ } else {
+ if (rsync || new_rsync) {
+ fprintf(stderr, "%s: --rsyncable not supported with --zlib\n", progname);
+ return 1;
+ }
+
+ gz_compress(STDIN_FILENO, STDOUT_FILENO, origname, timestamp, level, memlevel, osflag, xflag, ntfs_quirk);
+ }
+ return 0;
+}
+
+/* maybe print an error */
+void
+maybe_err(const char *fmt, ...)
+{
+ va_list ap;
+
+ if (qflag == 0) {
+ va_start(ap, fmt);
+ vwarn(fmt, ap);
+ va_end(ap);
+ }
+ exit(1);
+}
+
+/* ... without an errno. */
+void
+maybe_errx(const char *fmt, ...)
+{
+ va_list ap;
+
+ if (qflag == 0) {
+ va_start(ap, fmt);
+ vwarnx(fmt, ap);
+ va_end(ap);
+ }
+ exit(1);
+}
+
+/* compress input to output. */
+static void
+gz_compress(int in, int out, const char *origname, uint32_t mtime, int level, int memlevel, int osflag, int xflag, int ntfs_quirk)
+{
+ z_stream z;
+ char *outbufp, *inbufp;
+ off_t in_tot = 0;
+ ssize_t in_size;
+ int i, error;
+ uLong crc;
+
+ outbufp = malloc(BUFLEN);
+ inbufp = malloc(BUFLEN);
+ if (outbufp == NULL || inbufp == NULL)
+ maybe_err("malloc failed");
+
+ memset(&z, 0, sizeof z);
+ z.zalloc = Z_NULL;
+ z.zfree = Z_NULL;
+ z.opaque = 0;
+
+ i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c%c%c%s",
+ GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED,
+ origname ? ORIG_NAME : 0,
+ mtime & 0xff,
+ (mtime >> 8) & 0xff,
+ (mtime >> 16) & 0xff,
+ (mtime >> 24) & 0xff,
+ xflag >= 0 ? xflag :
+ level == 1 ? 4 : level == 9 ? 2 : 0,
+ osflag, origname ? origname : "");
+ if (i >= BUFLEN)
+ /* this need PATH_MAX > BUFLEN ... */
+ maybe_err("snprintf");
+ if (origname)
+ i++;
+
+ z.next_out = (unsigned char *)outbufp + i;
+ z.avail_out = BUFLEN - i;
+
+ error = deflateInit2(&z, level, Z_DEFLATED,
+ (-MAX_WBITS), memlevel, Z_DEFAULT_STRATEGY);
+ if (error != Z_OK)
+ maybe_err("deflateInit2 failed");
+
+ crc = crc32(0L, Z_NULL, 0);
+ for (;;) {
+ if (z.avail_out == 0) {
+ if (write(out, outbufp, BUFLEN) != BUFLEN)
+ maybe_err("write");
+
+ z.next_out = (unsigned char *)outbufp;
+ z.avail_out = BUFLEN;
+ }
+
+ if (z.avail_in == 0) {
+ in_size = read(in, inbufp, BUFLEN);
+ if (in_size < 0)
+ maybe_err("read");
+ if (in_size == 0)
+ break;
+
+ crc = crc32(crc, (const Bytef *)inbufp, (unsigned)in_size);
+ in_tot += in_size;
+ z.next_in = (unsigned char *)inbufp;
+ z.avail_in = in_size;
+ }
+
+ error = deflate(&z, Z_NO_FLUSH);
+ if (error != Z_OK && error != Z_STREAM_END)
+ maybe_errx("deflate failed");
+ }
+
+ /* clean up */
+ for (;;) {
+ size_t len;
+ ssize_t w;
+
+ error = deflate(&z, Z_FINISH);
+ if (error != Z_OK && error != Z_STREAM_END)
+ maybe_errx("deflate failed");
+
+ len = (char *)z.next_out - outbufp;
+
+ /* for a really strange reason, that
+ * particular byte is decremented */
+ if (ntfs_quirk)
+ outbufp[10]--;
+
+ w = write(out, outbufp, len);
+ if (w == -1 || (size_t)w != len)
+ maybe_err("write");
+ z.next_out = (unsigned char *)outbufp;
+ z.avail_out = BUFLEN;
+
+ if (error == Z_STREAM_END)
+ break;
+ }
+
+ if (deflateEnd(&z) != Z_OK)
+ maybe_errx("deflateEnd failed");
+
+ if (ntfs_quirk) {
+ /* write NTFS tail magic (?) */
+ i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c",
+ 0x00, 0x00, 0xff, 0xff, 0x03, 0x00);
+ if (i != 6)
+ maybe_err("snprintf");
+ if (write(out, outbufp, i) != i)
+ maybe_err("write");
+ }
+
+ /* write CRC32 and input size (ISIZE) at the tail */
+ i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c",
+ (int)crc & 0xff,
+ (int)(crc >> 8) & 0xff,
+ (int)(crc >> 16) & 0xff,
+ (int)(crc >> 24) & 0xff,
+ (int)in_tot & 0xff,
+ (int)(in_tot >> 8) & 0xff,
+ (int)(in_tot >> 16) & 0xff,
+ (int)(in_tot >> 24) & 0xff);
+ if (i != 8)
+ maybe_err("snprintf");
+ if (write(out, outbufp, i) != i)
+ maybe_err("write");
+
+ free(inbufp);
+ free(outbufp);
+}
+
+/* runs an external, reanimated compressor program */
+static void
+shamble(char *zombie, int level)
+{
+ char exec_buf[PATH_MAX];
+ char level_buf[3];
+ char *argv[3];
+ int i;
+
+ snprintf(exec_buf, sizeof(exec_buf), "%s/%s", PKGLIBDIR, zombie);
+ snprintf(level_buf, sizeof(level_buf), "-%i", level);
+
+ i = 0;
+ argv[i++] = exec_buf;
+ argv[i++] = level_buf;
+ argv[i++] = NULL;
+
+ execvp(exec_buf, argv);
+ perror("Failed to run external program");
+ exit(1);
+}
+
+/* swaps in a different library and runs a system program */
+static void
+rebrain(char *zombie, char *program, int level)
+{
+ char path_buf[PATH_MAX];
+ char level_buf[3];
+ char *argv[3];
+ int i;
+
+#if defined(__APPLE__) && defined(__MACH__)
+# define LD_PATH_VAR "DYLD_LIBRARY_PATH"
+#else
+# define LD_PATH_VAR "LD_LIBRARY_PATH"
+#endif
+
+ snprintf(path_buf, sizeof(path_buf), "%s/%s", PKGLIBDIR, zombie);
+ /* FIXME - should append, not overwrite */
+ setenv(LD_PATH_VAR, path_buf, 1);
+
+ snprintf(level_buf, sizeof(level_buf), "-%i", level);
+
+ i = 0;
+ argv[i++] = program;
+ argv[i++] = level_buf;
+ argv[i++] = NULL;
+
+ execvp(program, argv);
+ perror("Failed to run external program");
+ exit(1);
+}
+
+/* display usage */
+static void
+usage(void)
+{
+
+ fprintf(stderr, "%s\n", gzip_version);
+ fprintf(stderr,
+ "usage: zgz [-" OPT_LIST "] < <file> > <file>\n"
+ " -G --gnu use GNU gzip implementation\n"
+ " -Z --zlib use zlib's implementation (default)\n"
+ " -O --old-bzip2 generate bzip2 (0.9.5d) output\n"
+ " -S --suse-bzip2 generate suse bzip2 output\n"
+ " -P --suse-pbzip2 generate suse pbzip2 output\n"
+ " -1 --fast fastest (worst) compression\n"
+ " -2 .. -8 set compression level\n"
+ " -9 --best best (slowest) compression\n"
+ " -f --force force writing compressed data to a terminal\n"
+ " -N --name save or restore original file name and time stamp\n"
+ " -n --no-name don't save original file name or time stamp\n"
+ " -m --no-timestamp don't save original time stamp\n"
+ " -M --force-timestemp save the timestamp even if -n was passed\n"
+ " -q --quiet output no warnings\n"
+ " -V --version display program version\n"
+ " -h --help display this help\n"
+ " -o NAME\n"
+ " --original-name NAME use NAME as the original file name\n"
+ " -F NAME --filename NAME same as --original-name\n"
+ " -s --osflag set the OS flag to something different than 03 (Unix)\n"
+ " -T --timestamp SECONDS set the timestamp to the specified number of seconds\n"
+ " \ngnu-specific options:\n"
+ " -R --rsyncable make rsync-friendly archive\n"
+ " -r --new-rsyncable make rsync-friendly archive (new version)\n"
+ " \nzlib-specific options:\n"
+ " -k --quirk QUIRK enable a format quirk (buggy-bsd, ntfs, perl)\n");
+ exit(0);
+}
+
+/* display the license information of NetBSD gzip */
+static void
+display_license(void)
+{
+
+ fprintf(stderr, "%s\n", gzip_version);
+ fprintf(stderr, "%s\n", gzip_copyright);
+ exit(0);
+}
+
+/* display the version of NetBSD gzip */
+static void
+display_version(void)
+{
+
+ fprintf(stderr, "%s\n", gzip_version);
+ exit(0);
+}
--- /dev/null
+=head1 NAME
+
+zgz - Frankenstein's compressor
+
+=head1 SYNOPSIS
+
+B<zgz> [options] < file > file.gz
+
+=head1 DESCRIPTION
+
+This program is an unholy combination of the BSD gzip program, a modified
+GNU gzip that supports setting an arbitrary file name and timestamp,
+and an old, rotting version of bzip2 that we dug up somewhere at midnight.
+Only the bits to do with file compression were kept.
+
+There are many arcane options which aid L<pristine-gz>(1) in re-animating
+files. Use --help to see all the gory details.
+
+=head1 AUTHOR
+
+Matthew R. Green,
+Jean-loup Gailly,
+Julian R Seward,
+Faidon Liambotis,
+Josh Triplett,
+Joey Hess
+
+Note that several of the above donors would be very suprised at finding
+parts of themselves ... er, their work ... shambling around here. Please
+direct correspondance and/or flaming pitchforks to the pristine-tar
+maintainers.
+
+=cut
projects / tools / pristine-tar.git / commitdiff