posix/bug-regex7.c

   1 /* Test for regs allocation in re_search and re_match.
   2    Copyright (C) 2002-2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <locale.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <sys/types.h>
  24 #include <regex.h>
  25
  26
  27 int
  28 main (void)
  29 {
  30   struct re_pattern_buffer regex;
  31   struct re_registers regs;
  32   const char *s;
  33   int match, n;
  34   int result = 0;
  35
  36   memset (&regex, '\0', sizeof (regex));
  37   regs.start = regs.end = NULL;
  38   regs.num_regs = 0;
  39   s = re_compile_pattern ("a", 1, &regex);
  40   if (s != NULL)
  41     {
  42       puts ("failed to compile pattern \"a\"");
  43       result = 1;
  44     }
  45   else
  46     {
  47       match = re_search (&regex, "baobab", 6, 0, 6, &regs);
  48       n = 1;
  49       if (match != 1)
  50         {
  51           printf ("re_search returned %d, expected 1\n", match);
  52           result = 1;
  53         }
  54       else if (regs.num_regs <= n || regs.start[n] != -1 || regs.end[n] != -1)
  55         {
  56           puts ("re_search failed to fill the -1 sentinel");
  57           result = 1;
  58         }
  59     }
  60
  61   free (regex.buffer);
  62   memset (&regex, '\0', sizeof (regex));
  63
  64   s = re_compile_pattern ("\\(\\(\\(a\\)\\)\\)", 13, &regex);
  65   if (s != NULL)
  66     {
  67       puts ("failed to compile pattern /\\(\\(\\(a\\)\\)\\)/");
  68       result = 1;
  69     }
  70   else
  71     {
  72       match = re_match (&regex, "apl", 3, 0, &regs);
  73       n = 4;
  74       if (match != 1)
  75         {
  76           printf ("re_match returned %d, expected 1\n", match);
  77           result = 1;
  78         }
  79       else if (regs.num_regs <= n || regs.start[n] != -1 || regs.end[n] != -1)
  80         {
  81           puts ("re_match failed to fill the -1 sentinel");
  82           result = 1;
  83         }
  84     }
  85
  86   if (result == 0)
  87     puts (" -> OK");
  88
  89   return result;
  90 }