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  }