/[pcre]/code/trunk/perltest.pl
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Contents of /code/trunk/perltest.pl

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Revision 871 - (show annotations) (download)
Sat Jan 14 16:20:44 2012 UTC (2 years, 10 months ago) by ph10
File MIME type: text/plain
File size: 6215 byte(s)
Fix issues with UTF-8 in the Perl checking script.

1 #! /usr/bin/env perl
2
3 # Program for testing regular expressions with perl to check that PCRE handles
4 # them the same. This version supports /8 for UTF-8 testing. However, it needs
5 # to have "use utf8" at the start for running the UTF-8 tests, but *not* for
6 # the other tests. The only way I've found for doing this is to cat this line
7 # in explicitly in the RunPerlTest script. I've also used this method to supply
8 # "require Encode" for the UTF-8 tests, so that the main test will still run
9 # where Encode is not installed.
10
11 # use locale; # With this included, \x0b matches \s!
12
13 # Function for turning a string into a string of printing chars.
14
15 #require Encode;
16
17 sub pchars {
18 my($t) = "";
19
20 if ($utf8)
21 {
22 @p = unpack('U*', $_[0]);
23 foreach $c (@p)
24 {
25 if ($c >= 32 && $c < 127) { $t .= chr $c; }
26 else { $t .= sprintf("\\x{%02x}", $c);
27 }
28 }
29 }
30 else
31 {
32 foreach $c (split(//, $_[0]))
33 {
34 if (ord $c >= 32 && ord $c < 127) { $t .= $c; }
35 else { $t .= sprintf("\\x%02x", ord $c); }
36 }
37 }
38
39 $t;
40 }
41
42
43 # Read lines from named file or stdin and write to named file or stdout; lines
44 # consist of a regular expression, in delimiters and optionally followed by
45 # options, followed by a set of test data, terminated by an empty line.
46
47 # Sort out the input and output files
48
49 if (@ARGV > 0)
50 {
51 open(INFILE, "<$ARGV[0]") || die "Failed to open $ARGV[0]\n";
52 $infile = "INFILE";
53 }
54 else { $infile = "STDIN"; }
55
56 if (@ARGV > 1)
57 {
58 open(OUTFILE, ">$ARGV[1]") || die "Failed to open $ARGV[1]\n";
59 $outfile = "OUTFILE";
60 }
61 else { $outfile = "STDOUT"; }
62
63 printf($outfile "Perl $] Regular Expressions\n\n");
64
65 # Main loop
66
67 NEXT_RE:
68 for (;;)
69 {
70 printf " re> " if $infile eq "STDIN";
71 last if ! ($_ = <$infile>);
72 printf $outfile "$_" if $infile ne "STDIN";
73 next if ($_ eq "");
74
75 $pattern = $_;
76
77 while ($pattern !~ /^\s*(.).*\1/s)
78 {
79 printf " > " if $infile eq "STDIN";
80 last if ! ($_ = <$infile>);
81 printf $outfile "$_" if $infile ne "STDIN";
82 $pattern .= $_;
83 }
84
85 chomp($pattern);
86 $pattern =~ s/\s+$//;
87
88 # The private /+ modifier means "print $' afterwards".
89
90 $showrest = ($pattern =~ s/\+(?=[a-zA-Z]*$)//);
91
92 # A doubled version is used by pcretest to print remainders after captures
93
94 $pattern =~ s/\+(?=[a-zA-Z]*$)//;
95
96 # Remove /8 from a UTF-8 pattern.
97
98 $utf8 = $pattern =~ s/8(?=[a-zA-Z]*$)//;
99
100 # Remove /J from a pattern with duplicate names.
101
102 $pattern =~ s/J(?=[a-zA-Z]*$)//;
103
104 # Remove /K from a pattern (asks pcretest to check MARK data) */
105
106 $pattern =~ s/K(?=[a-zA-Z]*$)//;
107
108 # Remove /W from a pattern (asks pcretest to set PCRE_UCP)
109
110 $pattern =~ s/W(?=[a-zA-Z]*$)//;
111
112 # Remove /S or /SS from a pattern (asks pcretest to study or not to study)
113
114 $pattern =~ s/S(?=[a-zA-Z]*$)//g;
115
116 # Remove /Y from a pattern (asks pcretest to disable PCRE optimization)
117
118 $pattern =~ s/Y(?=[a-zA-Z]*$)//;
119
120 # Check that the pattern is valid
121
122 eval "\$_ =~ ${pattern}";
123 if ($@)
124 {
125 printf $outfile "Error: $@";
126 next NEXT_RE;
127 }
128
129 # If the /g modifier is present, we want to put a loop round the matching;
130 # otherwise just a single "if".
131
132 $cmd = ($pattern =~ /g[a-z]*$/)? "while" : "if";
133
134 # If the pattern is actually the null string, Perl uses the most recently
135 # executed (and successfully compiled) regex is used instead. This is a
136 # nasty trap for the unwary! The PCRE test suite does contain null strings
137 # in places - if they are allowed through here all sorts of weird and
138 # unexpected effects happen. To avoid this, we replace such patterns with
139 # a non-null pattern that has the same effect.
140
141 $pattern = "/(?#)/$2" if ($pattern =~ /^(.)\1(.*)$/);
142
143 # Read data lines and test them
144
145 for (;;)
146 {
147 printf "data> " if $infile eq "STDIN";
148 last NEXT_RE if ! ($_ = <$infile>);
149 chomp;
150 printf $outfile "$_\n" if $infile ne "STDIN";
151
152 s/\s+$//; # Remove trailing space
153 s/^\s+//; # Remove leading space
154 s/\\Y//g; # Remove \Y (pcretest flag to set PCRE_NO_START_OPTIMIZE)
155
156 last if ($_ eq "");
157 $x = eval "\"$_\""; # To get escapes processed
158
159 # Empty array for holding results, ensure $REGERROR and $REGMARK are
160 # unset, then do the matching.
161
162 @subs = ();
163
164 $pushes = "push \@subs,\$&;" .
165 "push \@subs,\$1;" .
166 "push \@subs,\$2;" .
167 "push \@subs,\$3;" .
168 "push \@subs,\$4;" .
169 "push \@subs,\$5;" .
170 "push \@subs,\$6;" .
171 "push \@subs,\$7;" .
172 "push \@subs,\$8;" .
173 "push \@subs,\$9;" .
174 "push \@subs,\$10;" .
175 "push \@subs,\$11;" .
176 "push \@subs,\$12;" .
177 "push \@subs,\$13;" .
178 "push \@subs,\$14;" .
179 "push \@subs,\$15;" .
180 "push \@subs,\$16;" .
181 "push \@subs,\$'; }";
182
183 undef $REGERROR;
184 undef $REGMARK;
185
186 eval "${cmd} (\$x =~ ${pattern}) {" . $pushes;
187
188 if ($@)
189 {
190 printf $outfile "Error: $@\n";
191 next NEXT_RE;
192 }
193 elsif (scalar(@subs) == 0)
194 {
195 printf $outfile "No match";
196 if (defined $REGERROR && $REGERROR != 1)
197 { printf $outfile (", mark = %s", &pchars($REGERROR)); }
198 printf $outfile "\n";
199 }
200 else
201 {
202 while (scalar(@subs) != 0)
203 {
204 printf $outfile (" 0: %s\n", &pchars($subs[0]));
205 printf $outfile (" 0+ %s\n", &pchars($subs[17])) if $showrest;
206 $last_printed = 0;
207 for ($i = 1; $i <= 16; $i++)
208 {
209 if (defined $subs[$i])
210 {
211 while ($last_printed++ < $i-1)
212 { printf $outfile ("%2d: <unset>\n", $last_printed); }
213 printf $outfile ("%2d: %s\n", $i, &pchars($subs[$i]));
214 $last_printed = $i;
215 }
216 }
217 splice(@subs, 0, 18);
218 }
219
220 # It seems that $REGMARK is not marked as UTF-8 even when use utf8 is
221 # set and the input pattern was a UTF-8 string. We can, however, force
222 # it to be so marked.
223
224 if (defined $REGMARK && $REGMARK != 1)
225 {
226 $xx = $REGMARK;
227 $xx = Encode::decode_utf8($xx) if $utf8;
228 printf $outfile ("MK: %s\n", &pchars($xx));
229 }
230 }
231 }
232 }
233
234 # printf $outfile "\n";
235
236 # End

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