1 /* Test for regs allocation in re_search and re_match.
2    Copyright (C) 2002-2022 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
main(void)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 }
91