posix/bug-regex10.c

   1 /* Test for re_match with non-zero start.
   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 <string.h>
  22 #include <regex.h>
  23
  24 int
  25 main (void)
  26 {
  27   struct re_pattern_buffer regex;
  28   struct re_registers regs;
  29   const char *s;
  30   int match;
  31   int result = 0;
  32
  33   regs.num_regs = 1;
  34   memset (&regex, '\0', sizeof (regex));
  35   s = re_compile_pattern ("[abc]*d", 7, &regex);
  36   if (s != NULL)
  37     {
  38       puts ("re_compile_pattern return non-NULL value");
  39       result = 1;
  40     }
  41   else
  42     {
  43       match = re_match (&regex, "foacabdxy", 9, 2, &regs);
  44       if (match != 5)
  45         {
  46           printf ("re_match returned %d, expected 5\n", match);
  47           result = 1;
  48         }
  49       else if (regs.start[0] != 2 || regs.end[0] != 7)
  50         {
  51           printf ("re_match returned %d..%d, expected 2..7\n",
  52                   regs.start[0], regs.end[0]);
  53           result = 1;
  54         }
  55         puts (" -> OK");
  56     }
  57
  58   return result;
  59 }