Tristan Matthews | 0461646 | 2013-11-14 16:09:34 -0500 | [diff] [blame] | 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-zA-Z]*$)//); |
| 89 | |
| 90 | # A doubled version is used by pcretest to print remainders after captures |
| 91 | |
| 92 | $pattern =~ s/\+(?=[a-zA-Z]*$)//; |
| 93 | |
| 94 | # Remove /8 from a UTF-8 pattern. |
| 95 | |
| 96 | $utf8 = $pattern =~ s/8(?=[a-zA-Z]*$)//; |
| 97 | |
| 98 | # Remove /J from a pattern with duplicate names. |
| 99 | |
| 100 | $pattern =~ s/J(?=[a-zA-Z]*$)//; |
| 101 | |
| 102 | # Remove /K from a pattern (asks pcretest to check MARK data) */ |
| 103 | |
| 104 | $pattern =~ s/K(?=[a-zA-Z]*$)//; |
| 105 | |
| 106 | # Remove /W from a pattern (asks pcretest to set PCRE_UCP) |
| 107 | |
| 108 | $pattern =~ s/W(?=[a-zA-Z]*$)//; |
| 109 | |
| 110 | # Remove /S or /SS from a pattern (asks pcretest to study or not to study) |
| 111 | |
| 112 | $pattern =~ s/S(?=[a-zA-Z]*$)//g; |
| 113 | |
| 114 | # Remove /Y from a pattern (asks pcretest to disable PCRE optimization) |
| 115 | |
| 116 | $pattern =~ s/Y(?=[a-zA-Z]*$)//; |
| 117 | |
| 118 | # Check that the pattern is valid |
| 119 | |
| 120 | eval "\$_ =~ ${pattern}"; |
| 121 | if ($@) |
| 122 | { |
| 123 | printf $outfile "Error: $@"; |
| 124 | next NEXT_RE; |
| 125 | } |
| 126 | |
| 127 | # If the /g modifier is present, we want to put a loop round the matching; |
| 128 | # otherwise just a single "if". |
| 129 | |
| 130 | $cmd = ($pattern =~ /g[a-z]*$/)? "while" : "if"; |
| 131 | |
| 132 | # If the pattern is actually the null string, Perl uses the most recently |
| 133 | # executed (and successfully compiled) regex is used instead. This is a |
| 134 | # nasty trap for the unwary! The PCRE test suite does contain null strings |
| 135 | # in places - if they are allowed through here all sorts of weird and |
| 136 | # unexpected effects happen. To avoid this, we replace such patterns with |
| 137 | # a non-null pattern that has the same effect. |
| 138 | |
| 139 | $pattern = "/(?#)/$2" if ($pattern =~ /^(.)\1(.*)$/); |
| 140 | |
| 141 | # Read data lines and test them |
| 142 | |
| 143 | for (;;) |
| 144 | { |
| 145 | printf "data> " if $infile eq "STDIN"; |
| 146 | last NEXT_RE if ! ($_ = <$infile>); |
| 147 | chomp; |
| 148 | printf $outfile "$_\n" if $infile ne "STDIN"; |
| 149 | |
| 150 | s/\s+$//; # Remove trailing space |
| 151 | s/^\s+//; # Remove leading space |
| 152 | s/\\Y//g; # Remove \Y (pcretest flag to set PCRE_NO_START_OPTIMIZE) |
| 153 | |
| 154 | last if ($_ eq ""); |
| 155 | $x = eval "\"$_\""; # To get escapes processed |
| 156 | |
| 157 | # Empty array for holding results, ensure $REGERROR and $REGMARK are |
| 158 | # unset, then do the matching. |
| 159 | |
| 160 | @subs = (); |
| 161 | |
| 162 | $pushes = "push \@subs,\$&;" . |
| 163 | "push \@subs,\$1;" . |
| 164 | "push \@subs,\$2;" . |
| 165 | "push \@subs,\$3;" . |
| 166 | "push \@subs,\$4;" . |
| 167 | "push \@subs,\$5;" . |
| 168 | "push \@subs,\$6;" . |
| 169 | "push \@subs,\$7;" . |
| 170 | "push \@subs,\$8;" . |
| 171 | "push \@subs,\$9;" . |
| 172 | "push \@subs,\$10;" . |
| 173 | "push \@subs,\$11;" . |
| 174 | "push \@subs,\$12;" . |
| 175 | "push \@subs,\$13;" . |
| 176 | "push \@subs,\$14;" . |
| 177 | "push \@subs,\$15;" . |
| 178 | "push \@subs,\$16;" . |
| 179 | "push \@subs,\$'; }"; |
| 180 | |
| 181 | undef $REGERROR; |
| 182 | undef $REGMARK; |
| 183 | |
| 184 | eval "${cmd} (\$x =~ ${pattern}) {" . $pushes; |
| 185 | |
| 186 | if ($@) |
| 187 | { |
| 188 | printf $outfile "Error: $@\n"; |
| 189 | next NEXT_RE; |
| 190 | } |
| 191 | elsif (scalar(@subs) == 0) |
| 192 | { |
| 193 | printf $outfile "No match"; |
| 194 | if (defined $REGERROR && $REGERROR != 1) |
| 195 | { print $outfile (", mark = $REGERROR"); } |
| 196 | printf $outfile "\n"; |
| 197 | } |
| 198 | else |
| 199 | { |
| 200 | while (scalar(@subs) != 0) |
| 201 | { |
| 202 | printf $outfile (" 0: %s\n", &pchars($subs[0])); |
| 203 | printf $outfile (" 0+ %s\n", &pchars($subs[17])) if $showrest; |
| 204 | $last_printed = 0; |
| 205 | for ($i = 1; $i <= 16; $i++) |
| 206 | { |
| 207 | if (defined $subs[$i]) |
| 208 | { |
| 209 | while ($last_printed++ < $i-1) |
| 210 | { printf $outfile ("%2d: <unset>\n", $last_printed); } |
| 211 | printf $outfile ("%2d: %s\n", $i, &pchars($subs[$i])); |
| 212 | $last_printed = $i; |
| 213 | } |
| 214 | } |
| 215 | splice(@subs, 0, 18); |
| 216 | } |
| 217 | if (defined $REGMARK && $REGMARK != 1) |
| 218 | { print $outfile ("MK: $REGMARK\n"); } |
| 219 | } |
| 220 | } |
| 221 | } |
| 222 | |
| 223 | # printf $outfile "\n"; |
| 224 | |
| 225 | # End |