3 # Program for testing regular expressions with perl to check that PCRE handles
4 # them the same. This is the version that supports /8 for UTF-8 testing. As it
5 # stands, it requires at least Perl 5.8 for UTF-8 support. However, it needs to
6 # have "use utf8" at the start for running the UTF-8 tests, but *not* for the
7 # other tests. The only way I've found for doing this is to cat this line in
8 # explicitly in the RunPerlTest script.
10 # use locale; # With this included, \x0b matches \s!
12 # Function for turning a string into a string of printing chars. There are
13 # currently problems with UTF-8 strings; this fudges round them.
20 @p = unpack('U*', $_[0]);
23 if ($c >= 32 && $c < 127) { $t .= chr $c; }
24 else { $t .= sprintf("\\x{%02x}", $c); }
30 foreach $c (split(//, $_[0]))
32 if (ord $c >= 32 && ord $c < 127) { $t .= $c; }
33 else { $t .= sprintf("\\x%02x", ord $c); }
41 # Read lines from named file or stdin and write to named file or stdout; lines
42 # consist of a regular expression, in delimiters and optionally followed by
43 # options, followed by a set of test data, terminated by an empty line.
45 # Sort out the input and output files
49 open(INFILE, "<$ARGV[0]") || die "Failed to open $ARGV[0]\n";
52 else { $infile = "STDIN"; }
56 open(OUTFILE, ">$ARGV[1]") || die "Failed to open $ARGV[1]\n";
59 else { $outfile = "STDOUT"; }
61 printf($outfile "Perl $] Regular Expressions\n\n");
68 printf " re> " if $infile eq "STDIN";
69 last if ! ($_ = <$infile>);
70 printf $outfile "$_" if $infile ne "STDIN";
75 while ($pattern !~ /^\s*(.).*\1/s)
77 printf " > " if $infile eq "STDIN";
78 last if ! ($_ = <$infile>);
79 printf $outfile "$_" if $infile ne "STDIN";
86 # The private /+ modifier means "print $' afterwards".
88 $showrest = ($pattern =~ s/\+(?=[a-zA-Z]*$)//);
90 # Remove /8 from a UTF-8 pattern.
92 $utf8 = $pattern =~ s/8(?=[a-zA-Z]*$)//;
94 # Remove /J from a pattern with duplicate names.
96 $pattern =~ s/J(?=[a-zA-Z]*$)//;
98 # Remove /K from a pattern (asks pcretest to check MARK data) */
100 $pattern =~ s/K(?=[a-zA-Z]*$)//;
102 # Remove /W from a pattern (asks pcretest to set PCRE_UCP)
104 $pattern =~ s/W(?=[a-zA-Z]*$)//;
106 # Check that the pattern is valid
108 eval "\$_ =~ ${pattern}";
111 printf $outfile "Error: $@";
115 # If the /g modifier is present, we want to put a loop round the matching;
116 # otherwise just a single "if".
118 $cmd = ($pattern =~ /g[a-z]*$/)? "while" : "if";
120 # If the pattern is actually the null string, Perl uses the most recently
121 # executed (and successfully compiled) regex is used instead. This is a
122 # nasty trap for the unwary! The PCRE test suite does contain null strings
123 # in places - if they are allowed through here all sorts of weird and
124 # unexpected effects happen. To avoid this, we replace such patterns with
125 # a non-null pattern that has the same effect.
127 $pattern = "/(?#)/$2" if ($pattern =~ /^(.)\1(.*)$/);
129 # Read data lines and test them
133 printf "data> " if $infile eq "STDIN";
134 last NEXT_RE if ! ($_ = <$infile>);
136 printf $outfile "$_\n" if $infile ne "STDIN";
138 s/\s+$//; # Remove trailing space
139 s/^\s+//; # Remove leading space
140 s/\\Y//g; # Remove \Y (pcretest flag to set PCRE_NO_START_OPTIMIZE)
143 $x = eval "\"$_\""; # To get escapes processed
145 # Empty array for holding results, ensure $REGERROR and $REGMARK are
146 # unset, then do the matching.
150 $pushes = "push \@subs,\$&;" .
160 "push \@subs,\$10;" .
161 "push \@subs,\$11;" .
162 "push \@subs,\$12;" .
163 "push \@subs,\$13;" .
164 "push \@subs,\$14;" .
165 "push \@subs,\$15;" .
166 "push \@subs,\$16;" .
167 "push \@subs,\$'; }";
172 eval "${cmd} (\$x =~ ${pattern}) {" . $pushes;
176 printf $outfile "Error: $@\n";
179 elsif (scalar(@subs) == 0)
181 printf $outfile "No match";
182 if (defined $REGERROR && $REGERROR != 1)
183 { print $outfile (", mark = $REGERROR"); }
184 printf $outfile "\n";
188 while (scalar(@subs) != 0)
190 printf $outfile (" 0: %s\n", &pchars($subs[0]));
191 printf $outfile (" 0+ %s\n", &pchars($subs[17])) if $showrest;
193 for ($i = 1; $i <= 16; $i++)
195 if (defined $subs[$i])
197 while ($last_printed++ < $i-1)
198 { printf $outfile ("%2d: <unset>\n", $last_printed); }
199 printf $outfile ("%2d: %s\n", $i, &pchars($subs[$i]));
203 splice(@subs, 0, 18);
205 if (defined $REGMARK && $REGMARK != 1)
206 { print $outfile ("MK: $REGMARK\n"); }
211 # printf $outfile "\n";