1  /* Test for regexec.
       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 <sys/types.h>
      23  #include <regex.h>
      24  
      25  
      26  int
      27  main (int argc, char *argv[])
      28  {
      29    regex_t re;
      30    regmatch_t mat[10];
      31    int i, j, ret = 0;
      32    const char *locales[] = { "C", "C.UTF-8", "de_DE.UTF-8" };
      33    const char *string = "http://www.regex.com/pattern/matching.html#intro";
      34    regmatch_t expect[10] = {
      35      { 0, 48 }, { 0, 5 }, { 0, 4 }, { 5, 20 }, { 7, 20 }, { 20, 42 },
      36      { -1, -1 }, { -1, -1 }, { 42, 48 }, { 43, 48 } };
      37  
      38    for (i = 0; i < sizeof (locales) / sizeof (locales[0]); ++i)
      39      {
      40        if (setlocale (LC_ALL, locales[i]) == NULL)
      41  	{
      42  	  puts ("cannot set locale");
      43  	  ret = 1;
      44  	}
      45        else if (regcomp (&re,
      46  			"^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(\\?([^#]*))?(#(.*))?",
      47  			REG_EXTENDED) != REG_NOERROR)
      48  	{
      49  	  puts ("cannot compile the regular expression");
      50  	  ret = 1;
      51  	}
      52        else if (regexec (&re, string, 10, mat, 0) == REG_NOMATCH)
      53  	{
      54  	  puts ("no match");
      55  	  ret = 1;
      56  	}
      57        else
      58  	{
      59  	  if (! memcmp (mat, expect, sizeof (mat)))
      60  	    printf ("matching ok for %s locale\n", locales[i]);
      61  	  else
      62  	    {
      63  	      printf ("matching failed for %s locale:\n", locales[i]);
      64  	      ret = 1;
      65  	      for (j = 0; j < 9; ++j)
      66  		if (mat[j].rm_so != -1)
      67  		  printf ("%d: %.*s\n", j, mat[j].rm_eo - mat[j].rm_so,
      68  			  string + mat[j].rm_so);
      69  	    }
      70  	}
      71      }
      72  
      73    return ret;
      74  }