1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
|
/* Test of searching in a string.
Copyright (C) 2007-2008 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2007. */
#include <config.h>
#include <string.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#define ASSERT(expr) \
do \
{ \
if (!(expr)) \
{ \
fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
fflush (stderr); \
abort (); \
} \
} \
while (0)
int
main ()
{
/* configure should already have checked that the locale is supported. */
if (setlocale (LC_ALL, "") == NULL)
return 1;
{
const char input[] = "f\303\266\303\266";
const char *result = mbsstr (input, "");
ASSERT (result == input);
}
{
const char input[] = "f\303\266\303\266";
const char *result = mbsstr (input, "\303\266");
ASSERT (result == input + 1);
}
{
const char input[] = "f\303\266\303\266";
const char *result = mbsstr (input, "\266\303");
ASSERT (result == NULL);
}
{
const char input[] = "\303\204BC \303\204BCD\303\204B \303\204BCD\303\204BCD\303\204BDE"; /* "ÄBC ÄBCDÄB ÄBCDÄBCDÄBDE" */
const char *result = mbsstr (input, "\303\204BCD\303\204BD"); /* "ÄBCDÄBD" */
ASSERT (result == input + 19);
}
{
const char input[] = "\303\204BC \303\204BCD\303\204B \303\204BCD\303\204BCD\303\204BDE"; /* "ÄBC ÄBCDÄB ÄBCDÄBCDÄBDE" */
const char *result = mbsstr (input, "\303\204BCD\303\204BE"); /* "ÄBCDÄBE" */
ASSERT (result == NULL);
}
/* Check that a very long haystack is handled quickly if the needle is
short and occurs near the beginning. */
{
size_t repeat = 10000;
size_t m = 1000000;
char *needle =
"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
char *haystack = (char *) malloc (m + 1);
if (haystack != NULL)
{
memset (haystack, 'A', m);
haystack[0] = '\303'; haystack[1] = '\204';
haystack[m] = '\0';
for (; repeat > 0; repeat--)
{
ASSERT (mbsstr (haystack, needle) == haystack + 2);
}
free (haystack);
}
}
/* Check that a very long needle is discarded quickly if the haystack is
short. */
{
size_t repeat = 10000;
size_t m = 1000000;
char *haystack =
"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
"A\303\207A\303\207A\303\207A\303\207A\303\207A\303\207A\303\207"
"A\303\207A\303\207A\303\207A\303\207A\303\207A\303\207A\303\207"
"A\303\207A\303\207A\303\207A\303\207A\303\207A\303\207A\303\207"
"A\303\207A\303\207A\303\207A\303\207A\303\207A\303\207A\303\207"
"A\303\207A\303\207A\303\207A\303\207A\303\207A\303\207";
char *needle = (char *) malloc (m + 1);
if (needle != NULL)
{
memset (needle, 'A', m);
needle[m] = '\0';
for (; repeat > 0; repeat--)
{
ASSERT (mbsstr (haystack, needle) == NULL);
}
free (needle);
}
}
/* Check that the asymptotic worst-case complexity is not quadratic. */
{
size_t m = 1000000;
char *haystack = (char *) malloc (2 * m + 3);
char *needle = (char *) malloc (m + 3);
if (haystack != NULL && needle != NULL)
{
const char *result;
memset (haystack, 'A', 2 * m);
haystack[2 * m] = '\303'; haystack[2 * m + 1] = '\207';
haystack[2 * m + 2] = '\0';
memset (needle, 'A', m);
needle[m] = '\303'; needle[m + 1] = '\207';
needle[m + 2] = '\0';
result = mbsstr (haystack, needle);
ASSERT (result == haystack + m);
}
free (needle);
free (haystack);
}
return 0;
}
|
