/[pcre]/code/trunk/perltest.pl
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revision 3 by nigel, Sat Feb 24 21:38:01 2007 UTC revision 49 by nigel, Sat Feb 24 21:39:33 2007 UTC
# Line 9  Line 9 
9  sub pchars {  sub pchars {
10  my($t) = "";  my($t) = "";
11    
12  foreach $c (split(//, @_[0]))  foreach $c (split(//, $_[0]))
13    {    {
14    if (ord $c >= 32 && ord $c < 127) { $t .= $c; }    if (ord $c >= 32 && ord $c < 127) { $t .= $c; }
15      else { $t .= sprintf("\\x%02x", ord $c); }      else { $t .= sprintf("\\x%02x", ord $c); }
# Line 39  if (@ARGV > 1) Line 39  if (@ARGV > 1)
39    }    }
40  else { $outfile = "STDOUT"; }  else { $outfile = "STDOUT"; }
41    
42  printf($outfile "Perl Regular Expressions\n\n");  printf($outfile "Perl $] Regular Expressions\n\n");
43    
44  # Main loop  # Main loop
45    
# Line 53  for (;;) Line 53  for (;;)
53    
54    $pattern = $_;    $pattern = $_;
55    
   $delimiter = substr($_, 0, 1);  
56    while ($pattern !~ /^\s*(.).*\1/s)    while ($pattern !~ /^\s*(.).*\1/s)
57      {      {
58      printf "    > " if $infile eq "STDIN";      printf "    > " if $infile eq "STDIN";
# Line 65  for (;;) Line 64  for (;;)
64     chomp($pattern);     chomp($pattern);
65     $pattern =~ s/\s+$//;     $pattern =~ s/\s+$//;
66    
67      # 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    # Check that the pattern is valid    # Check that the pattern is valid
73    
74    eval "\$_ =~ ${pattern}";    eval "\$_ =~ ${pattern}";
75    if ($@)    if ($@)
76      {      {
77      printf $outfile "Error: $@\n";      printf $outfile "Error: $@";
78      next NEXT_RE;      next NEXT_RE;
79      }      }
80    
81      # 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(.*)$/);
94    
95    # Read data lines and test them    # Read data lines and test them
96    
97    for (;;)    for (;;)
# Line 88  for (;;) Line 106  for (;;)
106    
107      last if ($_ eq "");      last if ($_ eq "");
108    
109      $_ = eval "\"$_\"";   # To get escapes processed      $x = eval "\"$_\"";   # To get escapes processed
110    
111        # Empty array for holding results, then do the matching.
112    
113        @subs = ();
114    
115      $ok = 0;      eval "${cmd} (\$x =~ ${pattern}) {" .
116      eval "if (\$_ =~ ${pattern}) {" .           "push \@subs,\$&;" .
117           "\$z = \$&;" .           "push \@subs,\$1;" .
118           "\$a = \$1;" .           "push \@subs,\$2;" .
119           "\$b = \$2;" .           "push \@subs,\$3;" .
120           "\$c = \$3;" .           "push \@subs,\$4;" .
121           "\$d = \$4;" .           "push \@subs,\$5;" .
122           "\$e = \$5;" .           "push \@subs,\$6;" .
123           "\$f = \$6;" .           "push \@subs,\$7;" .
124           "\$g = \$7;" .           "push \@subs,\$8;" .
125           "\$h = \$8;" .           "push \@subs,\$9;" .
126           "\$i = \$9;" .           "push \@subs,\$10;" .
127           "\$j = \$10;" .           "push \@subs,\$11;" .
128           "\$k = \$11;" .           "push \@subs,\$12;" .
129           "\$l = \$12;" .           "push \@subs,\$13;" .
130           "\$m = \$13;" .           "push \@subs,\$14;" .
131           "\$n = \$14;" .           "push \@subs,\$15;" .
132           "\$o = \$15;" .           "push \@subs,\$16;" .
133           "\$p = \$16;" .           "push \@subs,\$'; }";
          "\$ok = 1; }";  
134    
135      if ($@)      if ($@)
136        {        {
137        printf $outfile "Error: $@\n";        printf $outfile "Error: $@\n";
138        next NEXT_RE;        next NEXT_RE;
139        }        }
140      elsif (!$ok)      elsif (scalar(@subs) == 0)
141        {        {
142        printf $outfile "No match\n";        printf $outfile "No match\n";
143        }        }
144      else      else
145        {        {
146        @subs = ($z,$a,$b,$c,$d,$e,$f,$g,$h,$i,$j,$k,$l,$m,$n,$o,$p);        while (scalar(@subs) != 0)
       $last_printed = 0;  
       for ($i = 0; $i <= 17; $i++)  
147          {          {
148          if ($i == 0 || defined $subs[$i])          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; $i++)
152            {            {
153            while ($last_printed++ < $i-1)            if (defined $subs[$i])
154              { printf $outfile ("%2d: <unset>\n", $last_printed); }              {
155            printf $outfile ("%2d: %s\n", $i, &pchars($subs[$i]));              while ($last_printed++ < $i-1)
156            $last_printed = $i;                { printf $outfile ("%2d: <unset>\n", $last_printed); }
157                printf $outfile ("%2d: %s\n", $i, &pchars($subs[$i]));
158                $last_printed = $i;
159                }
160            }            }
161            splice(@subs, 0, 18);
162          }          }
163        }        }
164      }      }
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