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
27int
28main (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 (pattern: "a", length: 1, buffer: &regex);
40 if (s != NULL)
41 {
42 puts (s: "failed to compile pattern \"a\"");
43 result = 1;
44 }
45 else
46 {
47 match = re_search (buffer: &regex, String: "baobab", length: 6, start: 0, range: 6, regs: &regs);
48 n = 1;
49 if (match != 1)
50 {
51 printf (format: "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 (s: "re_search failed to fill the -1 sentinel");
57 result = 1;
58 }
59 }
60
61 free (ptr: regex.buffer);
62 memset (&regex, '\0', sizeof (regex));
63
64 s = re_compile_pattern (pattern: "\\(\\(\\(a\\)\\)\\)", length: 13, buffer: &regex);
65 if (s != NULL)
66 {
67 puts (s: "failed to compile pattern /\\(\\(\\(a\\)\\)\\)/");
68 result = 1;
69 }
70 else
71 {
72 match = re_match (buffer: &regex, String: "apl", length: 3, start: 0, regs: &regs);
73 n = 4;
74 if (match != 1)
75 {
76 printf (format: "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 (s: "re_match failed to fill the -1 sentinel");
82 result = 1;
83 }
84 }
85
86 if (result == 0)
87 puts (s: " -> OK");
88
89 return result;
90}
91

source code of glibc/posix/bug-regex7.c