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. For Perl 5.6, it
6 # can be used as is for non-UTF-8 testing, but you have to uncomment the
7 # "use utf8" lines in order to to UTF-8 stuff (and you mustn't uncomment them
11 # Function for turning a string into a string of printing chars. There are
12 # currently problems with UTF-8 strings; this fudges round them.
19 # use utf8; <=============== For UTF-8 in Perl 5.6
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 $c); }
42 # Read lines from named file or stdin and write to named file or stdout; lines
43 # consist of a regular expression, in delimiters and optionally followed by
44 # options, followed by a set of test data, terminated by an empty line.
46 # Sort out the input and output files
50 open(INFILE, "<$ARGV[0]") || die "Failed to open $ARGV[0]\n";
53 else { $infile = "STDIN"; }
57 open(OUTFILE, ">$ARGV[1]") || die "Failed to open $ARGV[1]\n";
60 else { $outfile = "STDOUT"; }
62 printf($outfile "Perl $] Regular Expressions\n\n");
69 printf " re> " if $infile eq "STDIN";
70 last if ! ($_ = <$infile>);
71 printf $outfile "$_" if $infile ne "STDIN";
76 while ($pattern !~ /^\s*(.).*\1/s)
78 printf " > " if $infile eq "STDIN";
79 last if ! ($_ = <$infile>);
80 printf $outfile "$_" if $infile ne "STDIN";
87 # The private /+ modifier means "print $' afterwards".
89 $showrest = ($pattern =~ s/\+(?=[a-z]*$)//);
91 # The private /8 modifier means "operate in UTF-8". Currently, Perl
92 # has bugs that we try to work around using this flag.
94 $utf8 = ($pattern =~ s/8(?=[a-z]*$)//);
96 # Check that the pattern is valid
100 # use utf8; <=============== For UTF-8 in Perl 5.6
101 eval "\$_ =~ ${pattern}";
105 eval "\$_ =~ ${pattern}";
110 printf $outfile "Error: $@";
114 # If the /g modifier is present, we want to put a loop round the matching;
115 # otherwise just a single "if".
117 $cmd = ($pattern =~ /g[a-z]*$/)? "while" : "if";
119 # If the pattern is actually the null string, Perl uses the most recently
120 # executed (and successfully compiled) regex is used instead. This is a
121 # nasty trap for the unwary! The PCRE test suite does contain null strings
122 # in places - if they are allowed through here all sorts of weird and
123 # unexpected effects happen. To avoid this, we replace such patterns with
124 # a non-null pattern that has the same effect.
126 $pattern = "/(?#)/$2" if ($pattern =~ /^(.)\1(.*)$/);
128 # Read data lines and test them
132 printf "data> " if $infile eq "STDIN";
133 last NEXT_RE if ! ($_ = <$infile>);
135 printf $outfile "$_\n" if $infile ne "STDIN";
142 $x = eval "\"$_\""; # To get escapes processed
144 # Empty array for holding results, then do the matching.
148 $pushes = "push \@subs,\$&;" .
158 "push \@subs,\$10;" .
159 "push \@subs,\$11;" .
160 "push \@subs,\$12;" .
161 "push \@subs,\$13;" .
162 "push \@subs,\$14;" .
163 "push \@subs,\$15;" .
164 "push \@subs,\$16;" .
165 "push \@subs,\$'; }";
169 # use utf8; <=============== For UTF-8 in Perl 5.6
170 eval "${cmd} (\$x =~ ${pattern}) {" . $pushes;
174 eval "${cmd} (\$x =~ ${pattern}) {" . $pushes;
179 printf $outfile "Error: $@\n";
182 elsif (scalar(@subs) == 0)
184 printf $outfile "No match\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);
209 # printf $outfile "\n";