posix/bug-regex7.c

   1 /* Test for regs allocation in re_search and re_match.
   2    Copyright (C) 2002-2019 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Stepan Kasal <kasal@math.cas.cz>, 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    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <locale.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <sys/types.h>
  25 #include <regex.h>
  26
  27
  28 int
  29 main (void)
  30 {
  31   struct re_pattern_buffer regex;
  32   struct re_registers regs;
  33   const char *s;
  34   int match, n;
  35   int result = 0;
  36
  37   memset (&regex, '\0', sizeof (regex));
  38   regs.start = regs.end = NULL;
  39   regs.num_regs = 0;
  40   s = re_compile_pattern ("a", 1, &regex);
  41   if (s != NULL)
  42     {
  43       puts ("failed to compile pattern \"a\"");
  44       result = 1;
  45     }
  46   else
  47     {
  48       match = re_search (&regex, "baobab", 6, 0, 6, &regs);
  49       n = 1;
  50       if (match != 1)
  51         {
  52           printf ("re_search returned %d, expected 1\n", match);
  53           result = 1;
  54         }
  55       else if (regs.num_regs <= n || regs.start[n] != -1 || regs.end[n] != -1)
  56         {
  57           puts ("re_search failed to fill the -1 sentinel");
  58           result = 1;
  59         }
  60     }
  61
  62   free (regex.buffer);
  63   memset (&regex, '\0', sizeof (regex));
  64
  65   s = re_compile_pattern ("\\(\\(\\(a\\)\\)\\)", 13, &regex);
  66   if (s != NULL)
  67     {
  68       puts ("failed to compile pattern /\\(\\(\\(a\\)\\)\\)/");
  69       result = 1;
  70     }
  71   else
  72     {
  73       match = re_match (&regex, "apl", 3, 0, &regs);
  74       n = 4;
  75       if (match != 1)
  76         {
  77           printf ("re_match returned %d, expected 1\n", match);
  78           result = 1;
  79         }
  80       else if (regs.num_regs <= n || regs.start[n] != -1 || regs.end[n] != -1)
  81         {
  82           puts ("re_match failed to fill the -1 sentinel");
  83           result = 1;
  84         }
  85     }
  86
  87   if (result == 0)
  88     puts (" -> OK");
  89
  90   return result;
  91 }