tags/pcre-3.4/perltest

#! /usr/bin/perl

# Program for testing regular expressions with perl to check that PCRE handles
# them the same.


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

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

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". We use it
  # only on the end of patterns to make it easy to chop off here.

  $showrest = ($pattern =~ s/\+(?=[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 = ();

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

    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/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	foreach $c (split(//, $_[0]))
13	{
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 { $outfile = "STDOUT"; }
41
42	printf($outfile "Perl $] Regular Expressions\n\n");
43
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	# 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
73
74	eval "\$_ =~ ${pattern}";
75	if ($@)
76	{
77	printf $outfile "Error: $@";
78	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
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	$x = eval "\"$_\""; # To get escapes processed
110
111	# Empty array for holding results, then do the matching.
112
113	@subs = ();
114
115	eval "${cmd} (\$x =~ ${pattern}) {" .
116	"push \@subs,\$&;" .
117	"push \@subs,\$1;" .
118	"push \@subs,\$2;" .
119	"push \@subs,\$3;" .
120	"push \@subs,\$4;" .
121	"push \@subs,\$5;" .
122	"push \@subs,\$6;" .
123	"push \@subs,\$7;" .
124	"push \@subs,\$8;" .
125	"push \@subs,\$9;" .
126	"push \@subs,\$10;" .
127	"push \@subs,\$11;" .
128	"push \@subs,\$12;" .
129	"push \@subs,\$13;" .
130	"push \@subs,\$14;" .
131	"push \@subs,\$15;" .
132	"push \@subs,\$16;" .
133	"push \@subs,\$'; }";
134
135	if ($@)
136	{
137	printf $outfile "Error: $@\n";
138	next NEXT_RE;
139	}
140	elsif (scalar(@subs) == 0)
141	{
142	printf $outfile "No match\n";
143	}
144	else
145	{
146	while (scalar(@subs) != 0)
147	{
148	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	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	}
161	splice(@subs, 0, 18);
162	}
163	}
164	}
165	}
166
167	printf $outfile "\n";
168
169	# End