posix/tst-rxspencer.c

   1 /* Regular expression tests.
   2    Copyright (C) 2003-2017 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <sys/types.h>
  21 #include <mcheck.h>
  22 #include <regex.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <locale.h>
  27 #include <getopt.h>
  28
  29 static void
  30 replace_special_chars (char *str)
  31 {
  32   for (; (str = strpbrk (str, "NTSZ")) != NULL; ++str)
  33     switch (*str)
  34       {
  35       case 'N': *str = '\n'; break;
  36       case 'T': *str = '\t'; break;
  37       case 'S': *str = ' '; break;
  38       case 'Z': *str = '\0'; break;
  39       }
  40 }
  41
  42 static void
  43 glibc_re_syntax (char *str)
  44 {
  45   char *p, *end = strchr (str, '\0') + 1;
  46
  47   /* Replace [[:<:]] with \< and [[:>:]] with \>.  */
  48   for (p = str; (p = strstr (p, "[[:")) != NULL; )
  49     if ((p[3] == '<' || p[3] == '>') && strncmp (p + 4, ":]]", 3) == 0)
  50       {
  51         p[0] = '\\';
  52         p[1] = p[3];
  53         memmove (p + 2, p + 7, end - p - 7);
  54         end -= 5;
  55         p += 2;
  56       }
  57     else
  58       p += 3;
  59 }
  60
  61 static char *
  62 mb_replace (char *dst, const char c)
  63 {
  64   switch (c)
  65     {
  66     /* Replace a with \'a and A with \'A.  */
  67     case 'a':
  68       *dst++ = '\xc3';
  69       *dst++ = '\xa1';
  70       break;
  71     case 'A':
  72       *dst++ = '\xc3';
  73       *dst++ = '\x81';
  74       break;
  75     /* Replace b with \v{c} and B with \v{C}.  */
  76     case 'b':
  77       *dst++ = '\xc4';
  78       *dst++ = '\x8d';
  79       break;
  80     case 'B':
  81       *dst++ = '\xc4';
  82       *dst++ = '\x8c';
  83       break;
  84     /* Replace c with \v{d} and C with \v{D}.  */
  85     case 'c':
  86       *dst++ = '\xc4';
  87       *dst++ = '\x8f';
  88       break;
  89     case 'C':
  90       *dst++ = '\xc4';
  91       *dst++ = '\x8e';
  92       break;
  93     /* Replace d with \'e and D with \'E.  */
  94     case 'd':
  95       *dst++ = '\xc3';
  96       *dst++ = '\xa9';
  97       break;
  98     case 'D':
  99       *dst++ = '\xc3';
 100       *dst++ = '\x89';
 101       break;
 102     }
 103   return dst;
 104 }
 105
 106 static char *
 107 mb_frob_string (const char *str, const char *letters)
 108 {
 109   char *ret, *dst;
 110   const char *src;
 111
 112   if (str == NULL)
 113     return NULL;
 114
 115   ret = malloc (2 * strlen (str) + 1);
 116   if (ret == NULL)
 117     return NULL;
 118
 119   for (src = str, dst = ret; *src; ++src)
 120     if (strchr (letters, *src))
 121       dst = mb_replace (dst, *src);
 122     else
 123       *dst++ = *src;
 124   *dst = '\0';
 125   return ret;
 126 }
 127
 128 /* Like mb_frob_string, but don't replace anything between
 129    [: and :], [. and .] or [= and =] or characters escaped
 130    with a backslash.  */
 131
 132 static char *
 133 mb_frob_pattern (const char *str, const char *letters)
 134 {
 135   char *ret, *dst;
 136   const char *src;
 137   int in_class = 0, escaped = 0;
 138
 139   if (str == NULL)
 140     return NULL;
 141
 142   ret = malloc (2 * strlen (str) + 1);
 143   if (ret == NULL)
 144     return NULL;
 145
 146   for (src = str, dst = ret; *src; ++src)
 147     if (*src == '\\')
 148       {
 149         escaped ^= 1;
 150         *dst++ = *src;
 151       }
 152     else if (escaped)
 153       {
 154         escaped = 0;
 155         *dst++ = *src;
 156         continue;
 157       }
 158     else if (!in_class && strchr (letters, *src))
 159       dst = mb_replace (dst, *src);
 160     else
 161       {
 162         if (!in_class && *src == '[' && strchr (":.=", src[1]))
 163           in_class = 1;
 164         else if (in_class && *src == ']' && strchr (":.=", src[-1]))
 165           in_class = 0;
 166         *dst++ = *src;
 167       }
 168   *dst = '\0';
 169   return ret;
 170 }
 171
 172 static int
 173 check_match (regmatch_t *rm, int idx, const char *string,
 174              const char *match, const char *fail)
 175 {
 176   if (match[0] == '-' && match[1] == '\0')
 177     {
 178       if (rm[idx].rm_so == -1 && rm[idx].rm_eo == -1)
 179         return 0;
 180       printf ("%s rm[%d] unexpectedly matched\n", fail, idx);
 181       return 1;
 182     }
 183
 184   if (rm[idx].rm_so == -1 || rm[idx].rm_eo == -1)
 185     {
 186       printf ("%s rm[%d] unexpectedly did not match\n", fail, idx);
 187       return 1;
 188     }
 189
 190   if (match[0] == '@')
 191     {
 192       if (rm[idx].rm_so != rm[idx].rm_eo)
 193         {
 194           printf ("%s rm[%d] not empty\n", fail, idx);
 195           return 1;
 196         }
 197
 198       if (strncmp (string + rm[idx].rm_so, match + 1, strlen (match + 1) ?: 1))
 199         {
 200           printf ("%s rm[%d] not matching %s\n", fail, idx, match);
 201           return 1;
 202         }
 203       return 0;
 204     }
 205
 206   if (rm[idx].rm_eo - rm[idx].rm_so != strlen (match)
 207       || strncmp (string + rm[idx].rm_so, match,
 208                   rm[idx].rm_eo - rm[idx].rm_so))
 209     {
 210       printf ("%s rm[%d] not matching %s\n", fail, idx, match);
 211       return 1;
 212     }
 213
 214   return 0;
 215 }
 216
 217 static int
 218 test (const char *pattern, int cflags, const char *string, int eflags,
 219       char *expect, char *matches, const char *fail)
 220 {
 221   regex_t re;
 222   regmatch_t rm[10];
 223   int n, ret = 0;
 224
 225   n = regcomp (&re, pattern, cflags);
 226   if (n != 0)
 227     {
 228       char buf[500];
 229       if (eflags == -1)
 230         {
 231           static struct { reg_errcode_t code; const char *name; } codes []
 232 #define C(x) { REG_##x, #x }
 233             = { C(NOERROR), C(NOMATCH), C(BADPAT), C(ECOLLATE),
 234                 C(ECTYPE), C(EESCAPE), C(ESUBREG), C(EBRACK),
 235                 C(EPAREN), C(EBRACE), C(BADBR), C(ERANGE),
 236                 C(ESPACE), C(BADRPT) };
 237
 238           for (int i = 0; i < sizeof (codes) / sizeof (codes[0]); ++i)
 239             if (n == codes[i].code)
 240               {
 241                 if (strcmp (string, codes[i].name))
 242                   {
 243                     printf ("%s regcomp returned REG_%s (expected REG_%s)\n",
 244                             fail, codes[i].name, string);
 245                     return 1;
 246                   }
 247                 return 0;
 248               }
 249
 250           printf ("%s regcomp return value REG_%d\n", fail, n);
 251           return 1;
 252         }
 253
 254       regerror (n, &re, buf, sizeof (buf));
 255       printf ("%s regcomp failed: %s\n", fail, buf);
 256       return 1;
 257     }
 258
 259   if (eflags == -1)
 260     {
 261       regfree (&re);
 262
 263       /* The test case file assumes something only guaranteed by the
 264          rxspencer regex implementation.  Namely that for empty
 265          expressions regcomp() return REG_EMPTY.  This is not the case
 266          for us and so we ignore this error.  */
 267       if (strcmp (string, "EMPTY") == 0)
 268         return 0;
 269
 270       printf ("%s regcomp unexpectedly succeeded\n", fail);
 271       return 1;
 272     }
 273
 274   if (regexec (&re, string, 10, rm, eflags))
 275     {
 276       regfree (&re);
 277       if (expect == NULL)
 278         return 0;
 279       printf ("%s regexec failed\n", fail);
 280       return 1;
 281     }
 282
 283   regfree (&re);
 284
 285   if (expect == NULL)
 286     {
 287       printf ("%s regexec unexpectedly succeeded\n", fail);
 288       return 1;
 289     }
 290
 291   if (cflags & REG_NOSUB)
 292     return 0;
 293
 294   ret = check_match (rm, 0, string, expect, fail);
 295   if (matches == NULL)
 296     return ret;
 297
 298   for (n = 1; ret == 0 && n < 10; ++n)
 299     {
 300       char *p = NULL;
 301
 302       if (matches)
 303         {
 304           p = strchr (matches, ',');
 305           if (p != NULL)
 306             *p = '\0';
 307         }
 308       ret = check_match (rm, n, string, matches ?: "-", fail);
 309       if (p)
 310         {
 311           *p = ',';
 312           matches = p + 1;
 313         }
 314       else
 315         matches = NULL;
 316     }
 317
 318   return ret;
 319 }
 320
 321 static int
 322 mb_test (const char *pattern, int cflags, const char *string, int eflags,
 323          char *expect, const char *matches, const char *letters,
 324          const char *fail)
 325 {
 326   char *pattern_mb = mb_frob_pattern (pattern, letters);
 327   const char *string_mb
 328     = eflags == -1 ? string : mb_frob_string (string, letters);
 329   char *expect_mb = mb_frob_string (expect, letters);
 330   char *matches_mb = mb_frob_string (matches, letters);
 331   int ret = 0;
 332
 333   if (!pattern_mb || !string_mb
 334       || (expect && !expect_mb) || (matches && !matches_mb))
 335     {
 336       printf ("%s %m", fail);
 337       ret = 1;
 338     }
 339   else
 340     ret = test (pattern_mb, cflags, string_mb, eflags, expect_mb,
 341                 matches_mb, fail);
 342
 343   free (matches_mb);
 344   free (expect_mb);
 345   if (string_mb != string)
 346     free ((char *) string_mb);
 347   free (pattern_mb);
 348   return ret;
 349 }
 350
 351 static int
 352 mb_tests (const char *pattern, int cflags, const char *string, int eflags,
 353           char *expect, const char *matches)
 354 {
 355   int ret = 0;
 356   int i;
 357   char letters[9], fail[20];
 358
 359   /* The tests aren't supposed to work with xdigit, since a-dA-D are
 360      hex digits while \'a \'A \v{c}\v{C}\v{d}\v{D}\'e \'E are not.  */
 361   if (strstr (pattern, "[:xdigit:]"))
 362     return 0;
 363
 364   /* XXX: regex ATM handles only single byte equivalence classes.  */
 365   if (strstr (pattern, "[[=b=]]"))
 366     return 0;
 367
 368   for (i = 1; i < 16; ++i)
 369     {
 370       char *p = letters;
 371       if (i & 1)
 372         {
 373           if (!strchr (pattern, 'a') && !strchr (string, 'a')
 374               && !strchr (pattern, 'A') && !strchr (string, 'A'))
 375             continue;
 376           *p++ = 'a', *p++ = 'A';
 377         }
 378       if (i & 2)
 379         {
 380           if (!strchr (pattern, 'b') && !strchr (string, 'b')
 381               && !strchr (pattern, 'B') && !strchr (string, 'B'))
 382             continue;
 383           *p++ = 'b', *p++ = 'B';
 384         }
 385       if (i & 4)
 386         {
 387           if (!strchr (pattern, 'c') && !strchr (string, 'c')
 388               && !strchr (pattern, 'C') && !strchr (string, 'C'))
 389             continue;
 390           *p++ = 'c', *p++ = 'C';
 391         }
 392       if (i & 8)
 393         {
 394           if (!strchr (pattern, 'd') && !strchr (string, 'd')
 395               && !strchr (pattern, 'D') && !strchr (string, 'D'))
 396             continue;
 397           *p++ = 'd', *p++ = 'D';
 398         }
 399       *p++ = '\0';
 400       sprintf (fail, "UTF-8 %s FAIL", letters);
 401       ret |= mb_test (pattern, cflags, string, eflags, expect, matches,
 402                       letters, fail);
 403     }
 404   return ret;
 405 }
 406
 407 int
 408 main (int argc, char **argv)
 409 {
 410   int ret = 0;
 411   char *line = NULL;
 412   size_t line_len = 0;
 413   ssize_t len;
 414   FILE *f;
 415   static int test_utf8 = 0;
 416   static const struct option options[] =
 417     {
 418       {"utf8",  no_argument,    &test_utf8,     1},
 419       {NULL,    0,              NULL,           0 }
 420     };
 421
 422   mtrace ();
 423
 424   while (getopt_long (argc, argv, "", options, NULL) >= 0);
 425
 426   if (optind + 1 != argc)
 427     {
 428       fprintf (stderr, "Missing test filename\n");
 429       return 1;
 430     }
 431
 432   f = fopen (argv[optind], "r");
 433   if (f == NULL)
 434     {
 435       fprintf (stderr, "Couldn't open %s\n", argv[optind]);
 436       return 1;
 437     }
 438
 439   while ((len = getline (&line, &line_len, f)) > 0)
 440     {
 441       char *pattern, *flagstr, *string, *expect, *matches, *p;
 442       int cflags = REG_EXTENDED, eflags = 0, try_bre_ere = 0;
 443
 444       if (line[len - 1] == '\n')
 445         line[len - 1] = '\0';
 446
 447       /* Skip comments and empty lines.  */
 448       if (*line == '#' || *line == '\0')
 449         continue;
 450
 451       puts (line);
 452       fflush (stdout);
 453
 454       pattern = strtok (line, "\t");
 455       if (pattern == NULL)
 456         continue;
 457
 458       if (strcmp (pattern, "\"\"") == 0)
 459         pattern += 2;
 460
 461       flagstr = strtok (NULL, "\t");
 462       if (flagstr == NULL)
 463         continue;
 464
 465       string = strtok (NULL, "\t");
 466       if (string == NULL)
 467         continue;
 468
 469       if (strcmp (string, "\"\"") == 0)
 470         string += 2;
 471
 472       for (p = flagstr; *p; ++p)
 473         switch (*p)
 474           {
 475           case '-':
 476             break;
 477           case 'b':
 478             cflags &= ~REG_EXTENDED;
 479             break;
 480           case '&':
 481             try_bre_ere = 1;
 482             break;
 483           case 'C':
 484             eflags = -1;
 485             break;
 486           case 'i':
 487             cflags |= REG_ICASE;
 488             break;
 489           case 's':
 490             cflags |= REG_NOSUB;
 491             break;
 492           case 'n':
 493             cflags |= REG_NEWLINE;
 494             break;
 495           case '^':
 496             eflags |= REG_NOTBOL;
 497             break;
 498           case '$':
 499             eflags |= REG_NOTEOL;
 500             break;
 501           case 'm':
 502           case 'p':
 503           case '#':
 504             /* Not supported.  */
 505             flagstr = NULL;
 506             break;
 507           }
 508
 509       if (flagstr == NULL)
 510         continue;
 511
 512       replace_special_chars (pattern);
 513       glibc_re_syntax (pattern);
 514       if (eflags != -1)
 515         replace_special_chars (string);
 516
 517       expect = strtok (NULL, "\t");
 518       matches = NULL;
 519       if (expect != NULL)
 520         {
 521           replace_special_chars (expect);
 522           matches = strtok (NULL, "\t");
 523           if (matches != NULL)
 524             replace_special_chars (matches);
 525         }
 526
 527       if (setlocale (LC_ALL, "C") == NULL)
 528         {
 529           puts ("setlocale C failed");
 530           ret = 1;
 531         }
 532       if (test (pattern, cflags, string, eflags, expect, matches, "FAIL")
 533           || (try_bre_ere
 534               && test (pattern, cflags & ~REG_EXTENDED, string, eflags,
 535                        expect, matches, "FAIL")))
 536         ret = 1;
 537       else if (test_utf8)
 538         {
 539           if (setlocale (LC_ALL, "cs_CZ.UTF-8") == NULL)
 540             {
 541               puts ("setlocale cs_CZ.UTF-8 failed");
 542               ret = 1;
 543             }
 544           else if (test (pattern, cflags, string, eflags, expect, matches,
 545                          "UTF-8 FAIL")
 546                    || (try_bre_ere
 547                        && test (pattern, cflags & ~REG_EXTENDED, string,
 548                                 eflags, expect, matches, "UTF-8 FAIL")))
 549             ret = 1;
 550           else if (mb_tests (pattern, cflags, string, eflags, expect, matches)
 551                    || (try_bre_ere
 552                        && mb_tests (pattern, cflags & ~REG_EXTENDED, string,
 553                                     eflags, expect, matches)))
 554             ret = 1;
 555         }
 556     }
 557
 558   free (line);
 559   fclose (f);
 560   return ret;
 561 }