3 # Copyright (C) 2009 Free Software Foundation, Inc.
5 # This program is free software: you can redistribute it and/or modify
6 # it under the terms of the GNU General Public License as published by
7 # the Free Software Foundation; either version 3 of the License, or
8 # (at your option) any later version.
10 # This program is distributed in the hope that it will be useful,
11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 # GNU General Public License for more details.
15 # You should have received a copy of the GNU General Public License
16 # along with this program. If not, see <http://www.gnu.org/licenses/>.
19 # This script determines the declared global symbols in a C header file.
21 # - The header files are in C, with only C89 comments.
22 # - No use of macros with parameters.
23 # - All global declarations are marked with 'extern'.
24 # - All declarations end in ';' on the same line.
25 # - Not more than one symbol is declared in a declaration.
28 # outputs to stdout the --help usage message.
32 Usage: declared.sh [OPTION]... < SOURCE.h
34 Extracts the declared global symbols of a C header file.
37 --help print this help and exit
38 --version print version information and exit
40 Report bugs to <bruno@clisp.org>."
44 # outputs to stdout the --version message.
47 echo "declared.sh (GNU libunistring)"
48 echo "Copyright (C) 2006, 2009 Free Software Foundation, Inc.
49 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
50 This is free software: you are free to change and redistribute it.
51 There is NO WARRANTY, to the extent permitted by law."
52 echo "Written by" "Bruno Haible"
55 # func_fatal_error message
56 # outputs to stderr a fatal error message, and terminates the program.
59 echo "declared.sh: *** $1" 1>&2
60 echo "declared.sh: *** Stop." 1>&2
64 # Command-line option processing.
65 while test $# -gt 0; do
67 --help | --hel | --he | --h )
70 --version | --versio | --versi | --vers | --ver | --ve | --v )
73 -- ) # Stop option prcessing
76 func_fatal_error "unrecognized option: $option"
83 if test $# -gt 0; then
84 func_fatal_error "too many arguments"
87 # A sed expression that removes ANSI C and ISO C99 comments.
92 s,^\\(\\([^\"'/]\\|\"\\([^\\\"]\\|[\\].\\)*\"\\|'\\([^\\']\\|[\\].\\)*'\\|[/][^\"'/*]\\|[/]\"\\([^\\\"]\\|[\\].\\)*\"\\|[/]'\\([^\\']\\|[\\].\\)*'\\)*\\)//.*,\\1,
94 s,^\\(\\([^\"'/]\\|\"\\([^\\\"]\\|[\\].\\)*\"\\|'\\([^\\']\\|[\\].\\)*'\\|[/][^\"'/*]\\|[/]\"\\([^\\\"]\\|[\\].\\)*\"\\|[/]'\\([^\\']\\|[\\].\\)*'\\)*\\)/[*]\\([^*]\\|[*][^/*]\\)*[*][*]*/,\\1 ,
96 /^\\([^\"'/]\\|\"\\([^\\\"]\\|[\\].\\)*\"\\|'\\([^\\']\\|[\\].\\)*'\\|[/][^\"'/*]\\|[/]\"\\([^\\\"]\\|[\\].\\)*\"\\|[/]'\\([^\\']\\|[\\].\\)*'\\)*[/][*]/{
97 s,^\\(\\([^\"'/]\\|\"\\([^\\\"]\\|[\\].\\)*\"\\|'\\([^\\']\\|[\\].\\)*'\\|[/][^\"'/*]\\|[/]\"\\([^\\\"]\\|[\\].\\)*\"\\|[/]'\\([^\\']\\|[\\].\\)*'\\)*\\)/[*].*,\\1 ,
101 s,^\\([^*]\\|[*][^/*]\\)*[*][*]*/,,
110 # Check that 'sed' supports the kind of regular expressions used in
111 # sed_remove_comments. The use of \| meaning alternation of basic regular
112 # expressions is a GNU extension.
113 sed_test='s,^\(\(a\|X\)*\)//.*,\1,'
114 sed_result=`echo 'aaa//bcd' | sed -e "$sed_test"`
115 test "$sed_result" = 'aaa' \
116 || func_fatal_error "The 'sed' program is not GNU sed. Try installing GNU sed."
118 # A sed expression that joins 'extern' declarations that are broken over
120 sed_join_multiline_externs='
130 # A sed expression that extracts the identifier of each 'extern' declaration.
131 sed_extract_extern_declared='s/^extern [^()]* \([A-Za-z_][A-Za-z0-9_]*\) *[;(].*$/\1/p'
133 sed -e "$sed_remove_comments" \
134 | sed -e "$sed_join_multiline_externs" \
135 | sed -n -e "$sed_extract_extern_declared"