1
/* Test and measure strlen functions.
2
Copyright (C) 1999-2012 Free Software Foundation, Inc.
3
This file is part of the GNU C Library.
4
Written by Jakub Jelinek <jakub@redhat.com>, 1999.
6
The GNU C Library is free software; you can redistribute it and/or
7
modify it under the terms of the GNU Lesser General Public
8
License as published by the Free Software Foundation; either
9
version 2.1 of the License, or (at your option) any later version.
11
The GNU C Library is distributed in the hope that it will be useful,
12
but WITHOUT ANY WARRANTY; without even the implied warranty of
13
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14
Lesser General Public License for more details.
16
You should have received a copy of the GNU Lesser General Public
17
License along with the GNU C Library; if not, see
18
<http://www.gnu.org/licenses/>. */
21
#define TEST_NAME "strnlen"
22
#include "test-string.h"
24
#define MIN(a,b) ((a) < (b) ? (a) : (b))
26
typedef size_t (*proto_t) (const char *, size_t);
27
size_t simple_strnlen (const char *, size_t);
29
IMPL (simple_strnlen, 0)
33
simple_strnlen (const char *s, size_t maxlen)
37
for (i = 0; i < maxlen && s[i]; ++i);
42
do_one_test (impl_t *impl, const char *s, size_t maxlen, size_t exp_len)
44
size_t len = CALL (impl, s, maxlen);
47
error (0, 0, "Wrong result in function %s %zd %zd", impl->name,
55
hp_timing_t start __attribute ((unused));
56
hp_timing_t stop __attribute ((unused));
57
hp_timing_t best_time = ~ (hp_timing_t) 0;
60
for (i = 0; i < 32; ++i)
62
HP_TIMING_NOW (start);
63
CALL (impl, s, maxlen);
65
HP_TIMING_BEST (best_time, start, stop);
68
printf ("\t%zd", (size_t) best_time);
73
do_test (size_t align, size_t len, size_t maxlen, int max_char)
78
if (align + len >= page_size)
81
for (i = 0; i < len; ++i)
82
buf1[align + i] = 1 + 7 * i % max_char;
83
buf1[align + len] = 0;
86
printf ("Length %4zd, alignment %2zd:", len, align);
88
FOR_EACH_IMPL (impl, 0)
89
do_one_test (impl, (char *) (buf1 + align), maxlen, MIN (len, maxlen));
96
do_random_tests (void)
98
size_t i, j, n, align, len;
99
unsigned char *p = buf1 + page_size - 512;
101
for (n = 0; n < ITERATIONS; n++)
103
align = random () & 15;
104
len = random () & 511;
105
if (len + align > 510)
106
len = 511 - align - (random () & 7);
107
j = len + align + 64;
111
for (i = 0; i < j; i++)
113
if (i == len + align)
117
p[i] = random () & 255;
118
if (i >= align && i < len + align && !p[i])
119
p[i] = (random () & 127) + 1;
123
FOR_EACH_IMPL (impl, 1)
126
&& CALL (impl, (char *) (p + align), len - 1) != len - 1)
128
error (0, 0, "Iteration %zd (limited) - wrong result in function %s (%zd) %zd != %zd, p %p",
129
n, impl->name, align,
130
CALL (impl, (char *) (p + align), len - 1), len - 1, p);
133
if (CALL (impl, (char *) (p + align), len) != len)
135
error (0, 0, "Iteration %zd (exact) - wrong result in function %s (%zd) %zd != %zd, p %p",
136
n, impl->name, align,
137
CALL (impl, (char *) (p + align), len), len, p);
140
if (CALL (impl, (char *) (p + align), len + 1) != len)
142
error (0, 0, "Iteration %zd (long) - wrong result in function %s (%zd) %zd != %zd, p %p",
143
n, impl->name, align,
144
CALL (impl, (char *) (p + align), len + 1), len, p);
159
FOR_EACH_IMPL (impl, 0)
160
printf ("\t%s", impl->name);
163
for (i = 1; i < 8; ++i)
165
do_test (0, i, i - 1, 127);
166
do_test (0, i, i, 127);
167
do_test (0, i, i + 1, 127);
170
for (i = 1; i < 8; ++i)
172
do_test (i, i, i - 1, 127);
173
do_test (i, i, i, 127);
174
do_test (i, i, i + 1, 127);
177
for (i = 2; i <= 10; ++i)
179
do_test (0, 1 << i, 5000, 127);
180
do_test (1, 1 << i, 5000, 127);
183
for (i = 1; i < 8; ++i)
184
do_test (0, i, 5000, 255);
186
for (i = 1; i < 8; ++i)
187
do_test (i, i, 5000, 255);
189
for (i = 2; i <= 10; ++i)
191
do_test (0, 1 << i, 5000, 255);
192
do_test (1, 1 << i, 5000, 255);
199
#include "test-skeleton.c"