posix/bug-regex11.c

   1 /* Regular expression tests.
   2    Copyright (C) 2002-2021 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Jakub Jelinek <jakub@redhat.com>, 2002.
   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    <https://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
  26 /* Tests supposed to match.  */
  27 struct
  28 {
  29   const char *pattern;
  30   const char *string;
  31   int flags, nmatch;
  32   regmatch_t rm[5];
  33 } tests[] = {
  34   /* Test for newline handling in regex.  */
  35   { "[^~]*~", "\nx~y", 0, 2, { { 0, 3 }, { -1, -1 } } },
  36   /* Other tests.  */
  37   { "a(.*)b", "a b", REG_EXTENDED, 2, { { 0, 3 }, { 1, 2 } } },
  38   { ".*|\\([KIO]\\)\\([^|]*\\).*|?[KIO]", "10~.~|P|K0|I10|O16|?KSb", 0, 3,
  39     { { 0, 21 }, { 15, 16 }, { 16, 18 } } },
  40   { ".*|\\([KIO]\\)\\([^|]*\\).*|?\\1", "10~.~|P|K0|I10|O16|?KSb", 0, 3,
  41     { { 0, 21 }, { 8, 9 }, { 9, 10 } } },
  42   { "^\\(a*\\)\\1\\{9\\}\\(a\\{0,9\\}\\)\\([0-9]*;.*[^a]\\2\\([0-9]\\)\\)",
  43     "a1;;0a1aa2aaa3aaaa4aaaaa5aaaaaa6aaaaaaa7aaaaaaaa8aaaaaaaaa9aa2aa1a0", 0,
  44     5, { { 0, 67 }, { 0, 0 }, { 0, 1 }, { 1, 67 }, { 66, 67 } } },
  45   /* Test for BRE expression anchoring.  POSIX says just that this may match;
  46      in glibc regex it always matched, so avoid changing it.  */
  47   { "\\(^\\|foo\\)bar", "bar", 0, 2, { { 0, 3 }, { -1, -1 } } },
  48   { "\\(foo\\|^\\)bar", "bar", 0, 2, { { 0, 3 }, { -1, -1 } } },
  49   /* In ERE this must be treated as an anchor.  */
  50   { "(^|foo)bar", "bar", REG_EXTENDED, 2, { { 0, 3 }, { -1, -1 } } },
  51   { "(foo|^)bar", "bar", REG_EXTENDED, 2, { { 0, 3 }, { -1, -1 } } },
  52   /* Here ^ cannot be treated as an anchor according to POSIX.  */
  53   { "(^|foo)bar", "(^|foo)bar", 0, 2, { { 0, 10 }, { -1, -1 } } },
  54   { "(foo|^)bar", "(foo|^)bar", 0, 2, { { 0, 10 }, { -1, -1 } } },
  55   /* More tests on backreferences.  */
  56   { "()\\1", "x", REG_EXTENDED, 2, { { 0, 0 }, { 0, 0 } } },
  57   { "()x\\1", "x", REG_EXTENDED, 2, { { 0, 1 }, { 0, 0 } } },
  58   { "()\\1*\\1*", "", REG_EXTENDED, 2, { { 0, 0 }, { 0, 0 } } },
  59   { "([0-9]).*\\1(a*)", "7;7a6", REG_EXTENDED, 3, { { 0, 4 }, { 0, 1 }, { 3, 4 } } },
  60   { "([0-9]).*\\1(a*)", "7;7a", REG_EXTENDED, 3, { { 0, 4 }, { 0, 1 }, { 3, 4 } } },
  61   { "(b)()c\\1", "bcb", REG_EXTENDED, 3, { { 0, 3 }, { 0, 1 }, { 1, 1 } } },
  62   { "()(b)c\\2", "bcb", REG_EXTENDED, 3, { { 0, 3 }, { 0, 0 }, { 0, 1 } } },
  63   { "a(b)()c\\1", "abcb", REG_EXTENDED, 3, { { 0, 4 }, { 1, 2 }, { 2, 2 } } },
  64   { "a()(b)c\\2", "abcb", REG_EXTENDED, 3, { { 0, 4 }, { 1, 1 }, { 1, 2 } } },
  65   { "()(b)\\1c\\2", "bcb", REG_EXTENDED, 3, { { 0, 3 }, { 0, 0 }, { 0, 1 } } },
  66   { "(b())\\2\\1", "bbbb", REG_EXTENDED, 3, { { 0, 2 }, { 0, 1 }, { 1, 1 } } },
  67   { "a()(b)\\1c\\2", "abcb", REG_EXTENDED, 3, { { 0, 4 }, { 1, 1 }, { 1, 2 } } },
  68   { "a()d(b)\\1c\\2", "adbcb", REG_EXTENDED, 3, { { 0, 5 }, { 1, 1 }, { 2, 3 } } },
  69   { "a(b())\\2\\1", "abbbb", REG_EXTENDED, 3, { { 0, 3 }, { 1, 2 }, { 2, 2 } } },
  70   { "(bb())\\2\\1", "bbbb", REG_EXTENDED, 3, { { 0, 4 }, { 0, 2 }, { 2, 2 } } },
  71   { "^([^,]*),\\1,\\1$", "a,a,a", REG_EXTENDED, 2, { { 0, 5 }, { 0, 1 } } },
  72   { "^([^,]*),\\1,\\1$", "ab,ab,ab", REG_EXTENDED, 2, { { 0, 8 }, { 0, 2 } } },
  73   { "^([^,]*),\\1,\\1,\\1$", "abc,abc,abc,abc", REG_EXTENDED, 2,
  74     { { 0, 15 }, { 0, 3 } } },
  75   { "^(.?)(.?)(.?)(.?)(.?).?\\5\\4\\3\\2\\1$",
  76     "level", REG_NOSUB | REG_EXTENDED, 0, { { -1, -1 } } },
  77   { "^(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.).?\\9\\8\\7\\6\\5\\4\\3\\2\\1$|^.?$",
  78     "level", REG_NOSUB | REG_EXTENDED, 0, { { -1, -1 } } },
  79   { "^(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.).?\\9\\8\\7\\6\\5\\4\\3\\2\\1$|^.?$",
  80     "abcdedcba", REG_EXTENDED, 1, { { 0, 9 } } },
  81 #if 0
  82   /* XXX Not used since they fail so far.  */
  83   { "^(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.).?\\9\\8\\7\\6\\5\\4\\3\\2\\1$|^.?$",
  84     "ababababa", REG_EXTENDED, 1, { { 0, 9 } } },
  85   { "^(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?).?\\9\\8\\7\\6\\5\\4\\3\\2\\1$",
  86     "level", REG_NOSUB | REG_EXTENDED, 0, { { -1, -1 } } },
  87   { "^(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?).?\\9\\8\\7\\6\\5\\4\\3\\2\\1$",
  88     "ababababa", REG_EXTENDED, 1, { { 0, 9 } } },
  89 #endif
  90 };
  91
  92 int
  93 main (void)
  94 {
  95   regex_t re;
  96   regmatch_t rm[5];
  97   size_t i;
  98   int n, ret = 0;
  99
 100   mtrace ();
 101
 102   for (i = 0; i < sizeof (tests) / sizeof (tests[0]); ++i)
 103     {
 104       n = regcomp (&re, tests[i].pattern, tests[i].flags);
 105       if (n != 0)
 106         {
 107           char buf[500];
 108           regerror (n, &re, buf, sizeof (buf));
 109           printf ("%s: regcomp %zd failed: %s\n", tests[i].pattern, i, buf);
 110           ret = 1;
 111           continue;
 112         }
 113
 114       if (regexec (&re, tests[i].string, tests[i].nmatch, rm, 0))
 115         {
 116           printf ("%s: regexec %zd failed\n", tests[i].pattern, i);
 117           ret = 1;
 118           regfree (&re);
 119           continue;
 120         }
 121
 122       for (n = 0; n < tests[i].nmatch; ++n)
 123         if (rm[n].rm_so != tests[i].rm[n].rm_so
 124               || rm[n].rm_eo != tests[i].rm[n].rm_eo)
 125           {
 126             if (tests[i].rm[n].rm_so == -1 && tests[i].rm[n].rm_eo == -1)
 127               break;
 128             printf ("%s: regexec %zd match failure rm[%d] %d..%d\n",
 129                     tests[i].pattern, i, n, rm[n].rm_so, rm[n].rm_eo);
 130             ret = 1;
 131             break;
 132           }
 133
 134       regfree (&re);
 135     }
 136
 137   return ret;
 138 }