code/trunk/perltest.pl

#! /usr/bin/env perl

# Program for testing regular expressions with perl to check that PCRE handles
# them the same. This version supports /8 for UTF-8 testing. 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. I've also used this method to supply
# "require Encode" for the UTF-8 tests, so that the main test will still run
# where Encode is not installed.

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

# Function for turning a string into a string of printing chars.

#use utf8;
#require Encode;

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-zA-Z]*$)//);

  # A doubled version is used by pcretest to print remainders after captures

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

  # Remove /8 from a UTF-8 pattern.

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

  # Remove /J from a pattern with duplicate names.

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

  # Remove /K from a pattern (asks pcretest to check MARK data) */

  $pattern =~ s/K(?=[a-zA-Z]*$)//;

  # Remove /W from a pattern (asks pcretest to set PCRE_UCP)

  $pattern =~ s/W(?=[a-zA-Z]*$)//;

  # Remove /S or /SS from a pattern (asks pcretest to study or not to study)

  $pattern =~ s/S(?=[a-zA-Z]*$)//g;

  # Remove /Y from a pattern (asks pcretest to disable PCRE optimization)

  $pattern =~ s/Y(?=[a-zA-Z]*$)//;

  # 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+$//;  # Remove trailing space
    s/^\s+//;  # Remove leading space
    s/\\Y//g;  # Remove \Y (pcretest flag to set PCRE_NO_START_OPTIMIZE)

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

    # Empty array for holding results, ensure $REGERROR and $REGMARK are
    # unset, 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,\$'; }";

    undef $REGERROR;
    undef $REGMARK;

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

    if ($@)
      {
      printf $outfile "Error: $@\n";
      next NEXT_RE;
      }
    elsif (scalar(@subs) == 0)
      {
      printf $outfile "No match";
      if (defined $REGERROR && $REGERROR != 1)
        { printf $outfile (", mark = %s", &pchars($REGERROR)); }
      printf $outfile "\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);
        }

      # It seems that $REGMARK is not marked as UTF-8 even when use utf8 is
      # set and the input pattern was a UTF-8 string. We can, however, force
      # it to be so marked.

      if (defined $REGMARK && $REGMARK != 1)
        {
        $xx = $REGMARK;
        $xx = Encode::decode_utf8($xx) if $utf8;
        printf $outfile ("MK: %s\n", &pchars($xx));
        }
      }
    }
  }

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