Janis Danisevskis | 112c9cc | 2016-03-31 13:35:25 +0100 | [diff] [blame^] | 1 | #! /bin/sh |
| 2 | |
| 3 | # Script for testing regular expressions with perl to check that PCRE2 handles |
| 4 | # them the same. The Perl code has to have "use utf8" and "require Encode" at |
| 5 | # the start when running UTF-8 tests, but *not* for non-utf8 tests. (The |
| 6 | # "require" would actually be OK for non-utf8-tests, but is not always |
| 7 | # installed, so this way the script will always run for these tests.) |
| 8 | # |
| 9 | # The desired effect is achieved by making this a shell script that passes the |
| 10 | # Perl script to Perl through a pipe. If the first argument is "-utf8", a |
| 11 | # suitable prefix is set up. |
| 12 | # |
| 13 | # The remaining arguments, if any, are passed to Perl. They are an input file |
| 14 | # and an output file. If there is one argument, the output is written to |
| 15 | # STDOUT. If Perl receives no arguments, it opens /dev/tty as input, and writes |
| 16 | # output to STDOUT. (I haven't found a way of getting it to use STDIN, because |
| 17 | # of the contorted piping input.) |
| 18 | |
| 19 | perl=perl |
| 20 | prefix='' |
| 21 | if [ $# -gt 0 -a "$1" = "-utf8" ] ; then |
| 22 | prefix="use utf8; require Encode;" |
| 23 | shift |
| 24 | fi |
| 25 | |
| 26 | |
| 27 | # The Perl script that follows has a similar specification to pcre2test, and so |
| 28 | # can be given identical input, except that input patterns can be followed only |
| 29 | # by Perl's lower case modifiers and certain other pcre2test modifiers that are |
| 30 | # either handled or ignored: |
| 31 | # |
| 32 | # aftertext interpreted as "print $' afterwards" |
| 33 | # afteralltext ignored |
| 34 | # dupnames ignored (Perl always allows) |
| 35 | # mark ignored |
| 36 | # no_auto_possess ignored |
| 37 | # no_start_optimize ignored |
| 38 | # ucp sets Perl's /u modifier |
| 39 | # utf invoke UTF-8 functionality |
| 40 | # |
| 41 | # The data lines must not have any pcre2test modifiers. They are processed as |
| 42 | # Perl double-quoted strings, so if they contain " $ or @ characters, these |
| 43 | # have to be escaped. For this reason, all such characters in the |
| 44 | # Perl-compatible testinput1 and testinput4 files are escaped so that they can |
| 45 | # be used for perltest as well as for pcre2test. The output from this script |
| 46 | # should be same as from pcre2test, apart from the initial identifying banner. |
| 47 | # |
| 48 | # The other testinput files are not suitable for feeding to perltest.sh, |
| 49 | # because they make use of the special modifiers that pcre2test uses for |
| 50 | # testing features of PCRE2. Some of these files also contain malformed regular |
| 51 | # expressions, in order to check that PCRE2 diagnoses them correctly. |
| 52 | |
| 53 | (echo "$prefix" ; cat <<'PERLEND' |
| 54 | |
| 55 | # Function for turning a string into a string of printing chars. |
| 56 | |
| 57 | sub pchars { |
| 58 | my($t) = ""; |
| 59 | if ($utf8) |
| 60 | { |
| 61 | @p = unpack('U*', $_[0]); |
| 62 | foreach $c (@p) |
| 63 | { |
| 64 | if ($c >= 32 && $c < 127) { $t .= chr $c; } |
| 65 | else { $t .= sprintf("\\x{%02x}", $c); |
| 66 | } |
| 67 | } |
| 68 | } |
| 69 | else |
| 70 | { |
| 71 | foreach $c (split(//, $_[0])) |
| 72 | { |
| 73 | if (ord $c >= 32 && ord $c < 127) { $t .= $c; } |
| 74 | else { $t .= sprintf("\\x%02x", ord $c); } |
| 75 | } |
| 76 | } |
| 77 | $t; |
| 78 | } |
| 79 | |
| 80 | |
| 81 | # Read lines from a named file or stdin and write to a named file or stdout; |
| 82 | # lines consist of a regular expression, in delimiters and optionally followed |
| 83 | # by options, followed by a set of test data, terminated by an empty line. |
| 84 | |
| 85 | # Sort out the input and output files |
| 86 | |
| 87 | if (@ARGV > 0) |
| 88 | { |
| 89 | open(INFILE, "<$ARGV[0]") || die "Failed to open $ARGV[0]\n"; |
| 90 | $infile = "INFILE"; |
| 91 | $interact = 0; |
| 92 | } |
| 93 | else |
| 94 | { |
| 95 | open(INFILE, "</dev/tty") || die "Failed to open /dev/tty\n"; |
| 96 | $infile = "INFILE"; |
| 97 | $interact = 1; |
| 98 | } |
| 99 | |
| 100 | if (@ARGV > 1) |
| 101 | { |
| 102 | open(OUTFILE, ">$ARGV[1]") || die "Failed to open $ARGV[1]\n"; |
| 103 | $outfile = "OUTFILE"; |
| 104 | } |
| 105 | else { $outfile = "STDOUT"; } |
| 106 | |
| 107 | printf($outfile "Perl $] Regular Expressions\n\n"); |
| 108 | |
| 109 | # Main loop |
| 110 | |
| 111 | NEXT_RE: |
| 112 | for (;;) |
| 113 | { |
| 114 | printf " re> " if $interact; |
| 115 | last if ! ($_ = <$infile>); |
| 116 | printf $outfile "$_" if ! $interact; |
| 117 | next if ($_ =~ /^\s*$/ || $_ =~ /^#/); |
| 118 | |
| 119 | $pattern = $_; |
| 120 | |
| 121 | while ($pattern !~ /^\s*(.).*\1/s) |
| 122 | { |
| 123 | printf " > " if $interact; |
| 124 | last if ! ($_ = <$infile>); |
| 125 | printf $outfile "$_" if ! $interact; |
| 126 | $pattern .= $_; |
| 127 | } |
| 128 | |
| 129 | chomp($pattern); |
| 130 | $pattern =~ s/\s+$//; |
| 131 | |
| 132 | # Split the pattern from the modifiers and adjust them as necessary. |
| 133 | |
| 134 | $pattern =~ /^\s*((.).*\2)(.*)$/s; |
| 135 | $pat = $1; |
| 136 | $mod = $3; |
| 137 | |
| 138 | # The private "aftertext" modifier means "print $' afterwards". |
| 139 | |
| 140 | $showrest = ($mod =~ s/aftertext,?//); |
| 141 | |
| 142 | # "allaftertext" is used by pcre2test to print remainders after captures |
| 143 | |
| 144 | $mod =~ s/allaftertext,?//; |
| 145 | |
| 146 | # Detect utf |
| 147 | |
| 148 | $utf8 = $mod =~ s/utf,?//; |
| 149 | |
| 150 | # Remove "dupnames". |
| 151 | |
| 152 | $mod =~ s/dupnames,?//; |
| 153 | |
| 154 | # Remove "mark" (asks pcre2test to check MARK data) */ |
| 155 | |
| 156 | $mod =~ s/mark,?//; |
| 157 | |
| 158 | # "ucp" asks pcre2test to set PCRE2_UCP; change this to /u for Perl |
| 159 | |
| 160 | $mod =~ s/ucp,?/u/; |
| 161 | |
| 162 | # Remove "no_auto_possess" and "no_start_optimize" (disable PCRE2 optimizations) |
| 163 | |
| 164 | $mod =~ s/no_auto_possess,?//; |
| 165 | $mod =~ s/no_start_optimize,?//; |
| 166 | |
| 167 | # Add back retained modifiers and check that the pattern is valid. |
| 168 | |
| 169 | $mod =~ s/,//g; |
| 170 | $pattern = "$pat$mod"; |
| 171 | eval "\$_ =~ ${pattern}"; |
| 172 | if ($@) |
| 173 | { |
| 174 | printf $outfile "Error: $@"; |
| 175 | if (! $interact) |
| 176 | { |
| 177 | for (;;) |
| 178 | { |
| 179 | last if ! ($_ = <$infile>); |
| 180 | last if $_ =~ /^\s*$/; |
| 181 | } |
| 182 | } |
| 183 | next NEXT_RE; |
| 184 | } |
| 185 | |
| 186 | # If the /g modifier is present, we want to put a loop round the matching; |
| 187 | # otherwise just a single "if". |
| 188 | |
| 189 | $cmd = ($pattern =~ /g[a-z]*$/)? "while" : "if"; |
| 190 | |
| 191 | # If the pattern is actually the null string, Perl uses the most recently |
| 192 | # executed (and successfully compiled) regex is used instead. This is a |
| 193 | # nasty trap for the unwary! The PCRE2 test suite does contain null strings |
| 194 | # in places - if they are allowed through here all sorts of weird and |
| 195 | # unexpected effects happen. To avoid this, we replace such patterns with |
| 196 | # a non-null pattern that has the same effect. |
| 197 | |
| 198 | $pattern = "/(?#)/$2" if ($pattern =~ /^(.)\1(.*)$/); |
| 199 | |
| 200 | # Read data lines and test them |
| 201 | |
| 202 | for (;;) |
| 203 | { |
| 204 | printf "data> " if $interact; |
| 205 | last NEXT_RE if ! ($_ = <$infile>); |
| 206 | chomp; |
| 207 | printf $outfile "%s", "$_\n" if ! $interact; |
| 208 | |
| 209 | s/\s+$//; # Remove trailing space |
| 210 | s/^\s+//; # Remove leading space |
| 211 | |
| 212 | last if ($_ eq ""); |
| 213 | next if $_ =~ /^\\=(?:\s|$)/; # Comment line |
| 214 | |
| 215 | $x = eval "\"$_\""; # To get escapes processed |
| 216 | |
| 217 | # Empty array for holding results, ensure $REGERROR and $REGMARK are |
| 218 | # unset, then do the matching. |
| 219 | |
| 220 | @subs = (); |
| 221 | |
| 222 | $pushes = "push \@subs,\$&;" . |
| 223 | "push \@subs,\$1;" . |
| 224 | "push \@subs,\$2;" . |
| 225 | "push \@subs,\$3;" . |
| 226 | "push \@subs,\$4;" . |
| 227 | "push \@subs,\$5;" . |
| 228 | "push \@subs,\$6;" . |
| 229 | "push \@subs,\$7;" . |
| 230 | "push \@subs,\$8;" . |
| 231 | "push \@subs,\$9;" . |
| 232 | "push \@subs,\$10;" . |
| 233 | "push \@subs,\$11;" . |
| 234 | "push \@subs,\$12;" . |
| 235 | "push \@subs,\$13;" . |
| 236 | "push \@subs,\$14;" . |
| 237 | "push \@subs,\$15;" . |
| 238 | "push \@subs,\$16;" . |
| 239 | "push \@subs,\$'; }"; |
| 240 | |
| 241 | undef $REGERROR; |
| 242 | undef $REGMARK; |
| 243 | |
| 244 | eval "${cmd} (\$x =~ ${pattern}) {" . $pushes; |
| 245 | |
| 246 | if ($@) |
| 247 | { |
| 248 | printf $outfile "Error: $@\n"; |
| 249 | next NEXT_RE; |
| 250 | } |
| 251 | elsif (scalar(@subs) == 0) |
| 252 | { |
| 253 | printf $outfile "No match"; |
| 254 | if (defined $REGERROR && $REGERROR != 1) |
| 255 | { printf $outfile (", mark = %s", &pchars($REGERROR)); } |
| 256 | printf $outfile "\n"; |
| 257 | } |
| 258 | else |
| 259 | { |
| 260 | while (scalar(@subs) != 0) |
| 261 | { |
| 262 | printf $outfile (" 0: %s\n", &pchars($subs[0])); |
| 263 | printf $outfile (" 0+ %s\n", &pchars($subs[17])) if $showrest; |
| 264 | $last_printed = 0; |
| 265 | for ($i = 1; $i <= 16; $i++) |
| 266 | { |
| 267 | if (defined $subs[$i]) |
| 268 | { |
| 269 | while ($last_printed++ < $i-1) |
| 270 | { printf $outfile ("%2d: <unset>\n", $last_printed); } |
| 271 | printf $outfile ("%2d: %s\n", $i, &pchars($subs[$i])); |
| 272 | $last_printed = $i; |
| 273 | } |
| 274 | } |
| 275 | splice(@subs, 0, 18); |
| 276 | } |
| 277 | |
| 278 | # It seems that $REGMARK is not marked as UTF-8 even when use utf8 is |
| 279 | # set and the input pattern was a UTF-8 string. We can, however, force |
| 280 | # it to be so marked. |
| 281 | |
| 282 | if (defined $REGMARK && $REGMARK != 1) |
| 283 | { |
| 284 | $xx = $REGMARK; |
| 285 | $xx = Encode::decode_utf8($xx) if $utf8; |
| 286 | printf $outfile ("MK: %s\n", &pchars($xx)); |
| 287 | } |
| 288 | } |
| 289 | } |
| 290 | } |
| 291 | |
| 292 | # printf $outfile "\n"; |
| 293 | |
| 294 | PERLEND |
| 295 | ) | $perl - $@ |
| 296 | |
| 297 | # End |