/[pcre]/code/tags/pcre-3.4/perltest8
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Contents of /code/tags/pcre-3.4/perltest8

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Revision 52 - (show annotations) (download)
Sat Feb 24 21:39:39 2007 UTC (7 years, 8 months ago) by nigel
File size: 4833 byte(s)
Tag code/trunk as code/tags/pcre-3.4.

1 #! /usr/bin/perl
2
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. It
5 # requires at least Perl 5.6.
6
7
8 # Function for turning a string into a string of printing chars. There are
9 # currently problems with UTF-8 strings; this fudges round them.
10
11 sub pchars {
12 my($t) = "";
13
14 if ($utf8)
15 {
16 use utf8;
17 @p = unpack('U*', $_[0]);
18 foreach $c (@p)
19 {
20 if ($c >= 32 && $c < 127) { $t .= chr $c; }
21 else { $t .= sprintf("\\x{%02x}", $c); }
22 }
23 }
24
25 else
26 {
27 foreach $c (split(//, $_[0]))
28 {
29 if (ord $c >= 32 && ord $c < 127) { $t .= $c; }
30 else { $t .= sprintf("\\x%02x", ord $c); }
31 }
32 }
33
34 $t;
35 }
36
37
38
39 # Read lines from named file or stdin and write to named file or stdout; lines
40 # consist of a regular expression, in delimiters and optionally followed by
41 # options, followed by a set of test data, terminated by an empty line.
42
43 # Sort out the input and output files
44
45 if (@ARGV > 0)
46 {
47 open(INFILE, "<$ARGV[0]") || die "Failed to open $ARGV[0]\n";
48 $infile = "INFILE";
49 }
50 else { $infile = "STDIN"; }
51
52 if (@ARGV > 1)
53 {
54 open(OUTFILE, ">$ARGV[1]") || die "Failed to open $ARGV[1]\n";
55 $outfile = "OUTFILE";
56 }
57 else { $outfile = "STDOUT"; }
58
59 printf($outfile "Perl $] Regular Expressions\n\n");
60
61 # Main loop
62
63 NEXT_RE:
64 for (;;)
65 {
66 printf " re> " if $infile eq "STDIN";
67 last if ! ($_ = <$infile>);
68 printf $outfile "$_" if $infile ne "STDIN";
69 next if ($_ eq "");
70
71 $pattern = $_;
72
73 while ($pattern !~ /^\s*(.).*\1/s)
74 {
75 printf " > " if $infile eq "STDIN";
76 last if ! ($_ = <$infile>);
77 printf $outfile "$_" if $infile ne "STDIN";
78 $pattern .= $_;
79 }
80
81 chomp($pattern);
82 $pattern =~ s/\s+$//;
83
84 # The private /+ modifier means "print $' afterwards".
85
86 $showrest = ($pattern =~ s/\+(?=[a-z]*$)//);
87
88 # The private /8 modifier means "operate in UTF-8". Currently, Perl
89 # has bugs that we try to work around using this flag.
90
91 $utf8 = ($pattern =~ s/8(?=[a-z]*$)//);
92
93 # Check that the pattern is valid
94
95 if ($utf8)
96 {
97 use utf8;
98 eval "\$_ =~ ${pattern}";
99 }
100 else
101 {
102 eval "\$_ =~ ${pattern}";
103 }
104
105 if ($@)
106 {
107 printf $outfile "Error: $@";
108 next NEXT_RE;
109 }
110
111 # If the /g modifier is present, we want to put a loop round the matching;
112 # otherwise just a single "if".
113
114 $cmd = ($pattern =~ /g[a-z]*$/)? "while" : "if";
115
116 # If the pattern is actually the null string, Perl uses the most recently
117 # executed (and successfully compiled) regex is used instead. This is a
118 # nasty trap for the unwary! The PCRE test suite does contain null strings
119 # in places - if they are allowed through here all sorts of weird and
120 # unexpected effects happen. To avoid this, we replace such patterns with
121 # a non-null pattern that has the same effect.
122
123 $pattern = "/(?#)/$2" if ($pattern =~ /^(.)\1(.*)$/);
124
125 # Read data lines and test them
126
127 for (;;)
128 {
129 printf "data> " if $infile eq "STDIN";
130 last NEXT_RE if ! ($_ = <$infile>);
131 chomp;
132 printf $outfile "$_\n" if $infile ne "STDIN";
133
134 s/\s+$//;
135 s/^\s+//;
136
137 last if ($_ eq "");
138
139 $x = eval "\"$_\""; # To get escapes processed
140
141 # Empty array for holding results, then do the matching.
142
143 @subs = ();
144
145 $pushes = "push \@subs,\$&;" .
146 "push \@subs,\$1;" .
147 "push \@subs,\$2;" .
148 "push \@subs,\$3;" .
149 "push \@subs,\$4;" .
150 "push \@subs,\$5;" .
151 "push \@subs,\$6;" .
152 "push \@subs,\$7;" .
153 "push \@subs,\$8;" .
154 "push \@subs,\$9;" .
155 "push \@subs,\$10;" .
156 "push \@subs,\$11;" .
157 "push \@subs,\$12;" .
158 "push \@subs,\$13;" .
159 "push \@subs,\$14;" .
160 "push \@subs,\$15;" .
161 "push \@subs,\$16;" .
162 "push \@subs,\$'; }";
163
164 if ($utf8)
165 {
166 use utf8;
167 eval "${cmd} (\$x =~ ${pattern}) {" . $pushes;
168 }
169 else
170 {
171 eval "${cmd} (\$x =~ ${pattern}) {" . $pushes;
172 }
173
174 if ($@)
175 {
176 printf $outfile "Error: $@\n";
177 next NEXT_RE;
178 }
179 elsif (scalar(@subs) == 0)
180 {
181 printf $outfile "No match\n";
182 }
183 else
184 {
185 while (scalar(@subs) != 0)
186 {
187 printf $outfile (" 0: %s\n", &pchars($subs[0]));
188 printf $outfile (" 0+ %s\n", &pchars($subs[17])) if $showrest;
189 $last_printed = 0;
190 for ($i = 1; $i <= 16; $i++)
191 {
192 if (defined $subs[$i])
193 {
194 while ($last_printed++ < $i-1)
195 { printf $outfile ("%2d: <unset>\n", $last_printed); }
196 printf $outfile ("%2d: %s\n", $i, &pchars($subs[$i]));
197 $last_printed = $i;
198 }
199 }
200 splice(@subs, 0, 18);
201 }
202 }
203 }
204 }
205
206 printf $outfile "\n";
207
208 # End

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