/[pcre]/code/branches/pcre16/perltest.pl
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Contents of /code/branches/pcre16/perltest.pl

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Revision 49 - (hide annotations) (download)
Sat Feb 24 21:39:33 2007 UTC (7 years, 6 months ago) by nigel
Original Path: code/trunk/perltest
File size: 4131 byte(s)
Load pcre-3.3 into code/trunk.

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

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