/* Test for regs allocation in re_search and re_match.

   Copyright (C) 2002-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Stepan Kasal <kasal@math.cas.cz>, 2002.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <locale.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <sys/types.h>

#include <regex.h>

int

main (void)

{

  struct re_pattern_buffer regex;

  struct re_registers regs;

  const char *s;

  int match, n;

  int result = 0;

  memset (&regex, '\0', sizeof (regex));

  regs.start = regs.end = NULL;

  regs.num_regs = 0;

  s = re_compile_pattern ("a", 1, &regex);

  if (s != NULL)

    {

      puts ("failed to compile pattern \"a\"");

      result = 1;

    }

  else

    {

      match = re_search (&regex, "baobab", 6, 0, 6, ®s;;

      n = 1;

      if (match != 1)

	{

	  printf ("re_search returned %d, expected 1\n", match);

	  result = 1;

	}

      else if (regs.num_regs <= n || regs.start[n] != -1 || regs.end[n] != -1)

	{

	  puts ("re_search failed to fill the -1 sentinel");

	  result = 1;

	}

    }

  free (regex.buffer);

  memset (&regex, '\0', sizeof (regex));

  s = re_compile_pattern ("\\(\\(\\(a\\)\\)\\)", 13, &regex);

  if (s != NULL)

    {

      puts ("failed to compile pattern /\\(\\(\\(a\\)\\)\\)/");

      result = 1;

    }

  else

    {

      match = re_match (&regex, "apl", 3, 0, ®s;;

      n = 4;

      if (match != 1)

	{

	  printf ("re_match returned %d, expected 1\n", match);

	  result = 1;

	}

      else if (regs.num_regs <= n || regs.start[n] != -1 || regs.end[n] != -1)

	{

	  puts ("re_match failed to fill the -1 sentinel");

	  result = 1;

	}

    }

  if (result == 0)

    puts (" -> OK");

  return result;

}