code/trunk/perltest.pl

#! /usr/bin/env perl

# Program for testing regular expressions with perl to check that PCRE handles
# them the same. This is the version that supports /8 for UTF-8 testing. As it
# stands, it requires at least Perl 5.8 for UTF-8 support. However, it needs to
# have "use utf8" at the start for running the UTF-8 tests, but *not* for the
# other tests. The only way I've found for doing this is to cat this line in
# explicitly in the RunPerlTest script.

# use locale;  # With this included, \x0b matches \s!

# Function for turning a string into a string of printing chars. There are
# currently problems with UTF-8 strings; this fudges round them.

sub pchars {
my($t) = "";

if ($utf8)
  {
  @p = unpack('U*', $_[0]);
  foreach $c (@p)
    {
    if ($c >= 32 && $c < 127) { $t .= chr $c; }
      else { $t .= sprintf("\\x{%02x}", $c); }
    }
  }

else
  {
  foreach $c (split(//, $_[0]))
    {
    if (ord $c >= 32 && ord $c < 127) { $t .= $c; }
      else { $t .= sprintf("\\x%02x", ord $c); }
    }
  }

$t;
}


# Read lines from named file or stdin and write to named file or stdout; lines
# consist of a regular expression, in delimiters and optionally followed by
# options, followed by a set of test data, terminated by an empty line.

# Sort out the input and output files

if (@ARGV > 0)
  {
  open(INFILE, "<$ARGV[0]") || die "Failed to open $ARGV[0]\n";
  $infile = "INFILE";
  }
else { $infile = "STDIN"; }

if (@ARGV > 1)
  {
  open(OUTFILE, ">$ARGV[1]") || die "Failed to open $ARGV[1]\n";
  $outfile = "OUTFILE";
  }
else { $outfile = "STDOUT"; }

printf($outfile "Perl $] Regular Expressions\n\n");

# Main loop

NEXT_RE:
for (;;)
  {
  printf "  re> " if $infile eq "STDIN";
  last if ! ($_ = <$infile>);
  printf $outfile "$_" if $infile ne "STDIN";
  next if ($_ eq "");

  $pattern = $_;

  while ($pattern !~ /^\s*(.).*\1/s)
    {
    printf "    > " if $infile eq "STDIN";
    last if ! ($_ = <$infile>);
    printf $outfile "$_" if $infile ne "STDIN";
    $pattern .= $_;
    }

   chomp($pattern);
   $pattern =~ s/\s+$//;

  # The private /+ modifier means "print $' afterwards".

  $showrest = ($pattern =~ s/\+(?=[a-z]*$)//);

  # Remove /8 from a UTF-8 pattern.

  $utf8 = $pattern =~ s/8(?=[a-z]*$)//;

  # Remove /J from a pattern with duplicate names.

  $pattern =~ s/J(?=[a-z]*$)//;

  # Check that the pattern is valid

  eval "\$_ =~ ${pattern}";
  if ($@)
    {
    printf $outfile "Error: $@";
    next NEXT_RE;
    }

  # If the /g modifier is present, we want to put a loop round the matching;
  # otherwise just a single "if".

  $cmd = ($pattern =~ /g[a-z]*$/)? "while" : "if";

  # If the pattern is actually the null string, Perl uses the most recently
  # executed (and successfully compiled) regex is used instead. This is a
  # nasty trap for the unwary! The PCRE test suite does contain null strings
  # in places - if they are allowed through here all sorts of weird and
  # unexpected effects happen. To avoid this, we replace such patterns with
  # a non-null pattern that has the same effect.

  $pattern = "/(?#)/$2" if ($pattern =~ /^(.)\1(.*)$/);

  # Read data lines and test them

  for (;;)
    {
    printf "data> " if $infile eq "STDIN";
    last NEXT_RE if ! ($_ = <$infile>);
    chomp;
    printf $outfile "$_\n" if $infile ne "STDIN";

    s/\s+$//;
    s/^\s+//;

    last if ($_ eq "");
    $x = eval "\"$_\"";   # To get escapes processed

    # Empty array for holding results, then do the matching.

    @subs = ();

    $pushes = "push \@subs,\$&;" .
         "push \@subs,\$1;" .
         "push \@subs,\$2;" .
         "push \@subs,\$3;" .
         "push \@subs,\$4;" .
         "push \@subs,\$5;" .
         "push \@subs,\$6;" .
         "push \@subs,\$7;" .
         "push \@subs,\$8;" .
         "push \@subs,\$9;" .
         "push \@subs,\$10;" .
         "push \@subs,\$11;" .
         "push \@subs,\$12;" .
         "push \@subs,\$13;" .
         "push \@subs,\$14;" .
         "push \@subs,\$15;" .
         "push \@subs,\$16;" .
         "push \@subs,\$'; }";

    eval "${cmd} (\$x =~ ${pattern}) {" . $pushes;

    if ($@)
      {
      printf $outfile "Error: $@\n";
      next NEXT_RE;
      }
    elsif (scalar(@subs) == 0)
      {
      printf $outfile "No match\n";
      }
    else
      {
      while (scalar(@subs) != 0)
        {
        printf $outfile (" 0: %s\n", &pchars($subs[0]));
        printf $outfile (" 0+ %s\n", &pchars($subs[17])) if $showrest;
        $last_printed = 0;
        for ($i = 1; $i <= 16; $i++)
          {
          if (defined $subs[$i])
            {
            while ($last_printed++ < $i-1)
              { printf $outfile ("%2d: <unset>\n", $last_printed); }
            printf $outfile ("%2d: %s\n", $i, &pchars($subs[$i]));
            $last_printed = $i;
            }
          }
        splice(@subs, 0, 18);
        }
      }
    }
  }

# printf $outfile "\n";

# End
1	#! /usr/bin/env 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. As it
5	# stands, it requires at least Perl 5.8 for UTF-8 support. However, it needs to
6	# have "use utf8" at the start for running the UTF-8 tests, but not for the
7	# other tests. The only way I've found for doing this is to cat this line in
8	# explicitly in the RunPerlTest script.
9
10	# use locale; # With this included, \x0b matches \s!
11
12	# Function for turning a string into a string of printing chars. There are
13	# currently problems with UTF-8 strings; this fudges round them.
14
15	sub pchars {
16	my($t) = "";
17
18	if ($utf8)
19	{
20	@p = unpack('U*', $_[0]);
21	foreach $c (@p)
22	{
23	if ($c >= 32 && $c < 127) { $t .= chr $c; }
24	else { $t .= sprintf("\\x{%02x}", $c); }
25	}
26	}
27
28	else
29	{
30	foreach $c (split(//, $_[0]))
31	{
32	if (ord $c >= 32 && ord $c < 127) { $t .= $c; }
33	else { $t .= sprintf("\\x%02x", ord $c); }
34	}
35	}
36
37	$t;
38	}
39
40
41	# Read lines from named file or stdin and write to named file or stdout; lines
42	# consist of a regular expression, in delimiters and optionally followed by
43	# options, followed by a set of test data, terminated by an empty line.
44
45	# Sort out the input and output files
46
47	if (@ARGV > 0)
48	{
49	open(INFILE, "<$ARGV[0]") \|\| die "Failed to open $ARGV[0]\n";
50	$infile = "INFILE";
51	}
52	else { $infile = "STDIN"; }
53
54	if (@ARGV > 1)
55	{
56	open(OUTFILE, ">$ARGV[1]") \|\| die "Failed to open $ARGV[1]\n";
57	$outfile = "OUTFILE";
58	}
59	else { $outfile = "STDOUT"; }
60
61	printf($outfile "Perl $] Regular Expressions\n\n");
62
63	# Main loop
64
65	NEXT_RE:
66	for (;;)
67	{
68	printf " re> " if $infile eq "STDIN";
69	last if ! ($_ = <$infile>);
70	printf $outfile "$_" if $infile ne "STDIN";
71	next if ($_ eq "");
72
73	$pattern = $_;
74
75	while ($pattern !~ /^\s(.).\1/s)
76	{
77	printf " > " if $infile eq "STDIN";
78	last if ! ($_ = <$infile>);
79	printf $outfile "$_" if $infile ne "STDIN";
80	$pattern .= $_;
81	}
82
83	chomp($pattern);
84	$pattern =~ s/\s+$//;
85
86	# The private /+ modifier means "print $' afterwards".
87
88	$showrest = ($pattern =~ s/\+(?=[a-z]*$)//);
89
90	# Remove /8 from a UTF-8 pattern.
91
92	$utf8 = $pattern =~ s/8(?=[a-z]*$)//;
93
94	# Remove /J from a pattern with duplicate names.
95
96	$pattern =~ s/J(?=[a-z]*$)//;
97
98	# Check that the pattern is valid
99
100	eval "\$_ =~ ${pattern}";
101	if ($@)
102	{
103	printf $outfile "Error: $@";
104	next NEXT_RE;
105	}
106
107	# If the /g modifier is present, we want to put a loop round the matching;
108	# otherwise just a single "if".
109
110	$cmd = ($pattern =~ /g[a-z]*$/)? "while" : "if";
111
112	# If the pattern is actually the null string, Perl uses the most recently
113	# executed (and successfully compiled) regex is used instead. This is a
114	# nasty trap for the unwary! The PCRE test suite does contain null strings
115	# in places - if they are allowed through here all sorts of weird and
116	# unexpected effects happen. To avoid this, we replace such patterns with
117	# a non-null pattern that has the same effect.
118
119	$pattern = "/(?#)/$2" if ($pattern =~ /^(.)\1(.*)$/);
120
121	# Read data lines and test them
122
123	for (;;)
124	{
125	printf "data> " if $infile eq "STDIN";
126	last NEXT_RE if ! ($_ = <$infile>);
127	chomp;
128	printf $outfile "$_\n" if $infile ne "STDIN";
129
130	s/\s+$//;
131	s/^\s+//;
132
133	last if ($_ eq "");
134	$x = eval "\"$_\""; # To get escapes processed
135
136	# Empty array for holding results, then do the matching.
137
138	@subs = ();
139
140	$pushes = "push \@subs,\$&;" .
141	"push \@subs,\$1;" .
142	"push \@subs,\$2;" .
143	"push \@subs,\$3;" .
144	"push \@subs,\$4;" .
145	"push \@subs,\$5;" .
146	"push \@subs,\$6;" .
147	"push \@subs,\$7;" .
148	"push \@subs,\$8;" .
149	"push \@subs,\$9;" .
150	"push \@subs,\$10;" .
151	"push \@subs,\$11;" .
152	"push \@subs,\$12;" .
153	"push \@subs,\$13;" .
154	"push \@subs,\$14;" .
155	"push \@subs,\$15;" .
156	"push \@subs,\$16;" .
157	"push \@subs,\$'; }";
158
159	eval "${cmd} (\$x =~ ${pattern}) {" . $pushes;
160
161	if ($@)
162	{
163	printf $outfile "Error: $@\n";
164	next NEXT_RE;
165	}
166	elsif (scalar(@subs) == 0)
167	{
168	printf $outfile "No match\n";
169	}
170	else
171	{
172	while (scalar(@subs) != 0)
173	{
174	printf $outfile (" 0: %s\n", &pchars($subs[0]));
175	printf $outfile (" 0+ %s\n", &pchars($subs[17])) if $showrest;
176	$last_printed = 0;
177	for ($i = 1; $i <= 16; $i++)
178	{
179	if (defined $subs[$i])
180	{
181	while ($last_printed++ < $i-1)
182	{ printf $outfile ("%2d: <unset>\n", $last_printed); }
183	printf $outfile ("%2d: %s\n", $i, &pchars($subs[$i]));
184	$last_printed = $i;
185	}
186	}
187	splice(@subs, 0, 18);
188	}
189	}
190	}
191	}
192
193	# printf $outfile "\n";
194
195	# End