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
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
|
/* Test strlen functions.
Copyright (C) 1999-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Written by Jakub Jelinek <jakub@redhat.com>, 1999.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#define TEST_MAIN
#ifndef WIDE
# define TEST_NAME "strnlen"
#else
# define TEST_NAME "wcsnlen"
#endif /* !WIDE */
#include "test-string.h"
#ifndef WIDE
# define STRNLEN strnlen
# define CHAR char
# define BIG_CHAR CHAR_MAX
# define MIDDLE_CHAR 127
# define SIMPLE_STRNLEN simple_strnlen
#else
# include <wchar.h>
# define STRNLEN wcsnlen
# define CHAR wchar_t
# define BIG_CHAR WCHAR_MAX
# define MIDDLE_CHAR 1121
# define SIMPLE_STRNLEN simple_wcsnlen
#endif /* !WIDE */
typedef size_t (*proto_t) (const CHAR *, size_t);
size_t SIMPLE_STRNLEN (const CHAR *, size_t);
IMPL (SIMPLE_STRNLEN, 0)
IMPL (STRNLEN, 1)
size_t
SIMPLE_STRNLEN (const CHAR *s, size_t maxlen)
{
size_t i;
for (i = 0; i < maxlen && s[i]; ++i);
return i;
}
static void
do_one_test (impl_t *impl, const CHAR *s, size_t maxlen, size_t exp_len)
{
size_t len = CALL (impl, s, maxlen);
if (len != exp_len)
{
error (0, 0, "Wrong result in function %s %zd %zd", impl->name,
len, exp_len);
ret = 1;
return;
}
}
static void
do_test (size_t align, size_t len, size_t maxlen, int max_char)
{
size_t i;
align &= 63;
if ((align + len) * sizeof (CHAR) >= page_size)
return;
CHAR *buf = (CHAR *) (buf1);
for (i = 0; i < len; ++i)
buf[align + i] = 1 + 11111 * i % max_char;
buf[align + len] = 0;
FOR_EACH_IMPL (impl, 0)
do_one_test (impl, (CHAR *) (buf + align), maxlen, MIN (len, maxlen));
}
static void
do_random_tests (void)
{
size_t i, j, n, align, len;
CHAR *p = (CHAR *) (buf1 + page_size - 512 * sizeof (CHAR));
for (n = 0; n < ITERATIONS; n++)
{
align = random () & 15;
len = random () & 511;
if (len + align > 510)
len = 511 - align - (random () & 7);
j = len + align + 64;
if (j > 512)
j = 512;
for (i = 0; i < j; i++)
{
if (i == len + align)
p[i] = 0;
else
{
p[i] = random () & 255;
if (i >= align && i < len + align && !p[i])
p[i] = (random () & 127) + 1;
}
}
FOR_EACH_IMPL (impl, 1)
{
if (len > 0
&& CALL (impl, (CHAR *) (p + align), len - 1) != len - 1)
{
error (0, 0, "Iteration %zd (limited) - wrong result in function %s (%zd) %zd != %zd, p %p",
n, impl->name, align,
CALL (impl, (CHAR *) (p + align), len - 1), len - 1, p);
ret = 1;
}
if (CALL (impl, (CHAR *) (p + align), len) != len)
{
error (0, 0, "Iteration %zd (exact) - wrong result in function %s (%zd) %zd != %zd, p %p",
n, impl->name, align,
CALL (impl, (CHAR *) (p + align), len), len, p);
ret = 1;
}
if (CALL (impl, (CHAR *) (p + align), len + 1) != len)
{
error (0, 0, "Iteration %zd (long) - wrong result in function %s (%zd) %zd != %zd, p %p",
n, impl->name, align,
CALL (impl, (CHAR *) (p + align), len + 1), len, p);
ret = 1;
}
}
}
}
/* Tests meant to unveil fail on implementation that does not access bytes
around the page boundary accordingly. */
static void
do_page_tests (void)
{
size_t i, exp_len, start_offset, offset;
/* Calculate the null character offset. */
size_t last_offset = (page_size / sizeof (CHAR)) - 1;
CHAR *s = (CHAR *) buf2;
memset (s, 65, (last_offset - 1));
s[last_offset] = 0;
/* Place short strings ending at page boundary. */
offset = last_offset;
for (i = 0; i < 128; i++)
{
/* Decrease offset to stress several sizes and alignments. */
offset--;
exp_len = last_offset - offset;
FOR_EACH_IMPL (impl, 0)
{
/* Varies maxlen value to cover the cases where it is:
- larger than length;
- slightly greater than length;
- equal to length;
- slightly less than length. */
do_one_test (impl, (CHAR *) (s + offset), page_size, exp_len);
do_one_test (impl, (CHAR *) (s + offset), exp_len + 1, exp_len);
do_one_test (impl, (CHAR *) (s + offset), exp_len, exp_len);
if (exp_len > 0)
do_one_test (impl, (CHAR *) (s + offset), exp_len - 1, exp_len - 1);
}
}
/* Place long strings ending at page boundary. */
start_offset = (last_offset + 1) / 2;
for (i = 0; i < 64; ++i)
{
/* Increase offset to stress several alignments. */
offset = start_offset + i;
if (offset >= (last_offset + 1))
break;
exp_len = last_offset - offset;
FOR_EACH_IMPL (impl, 0)
{
/* Checks only for maxlen much larger than length because smaller
values are already covered in do_random_tests function. */
do_one_test (impl, (CHAR *) (s + offset), page_size, exp_len);
}
}
}
int
test_main (void)
{
size_t i;
test_init ();
printf ("%20s", "");
FOR_EACH_IMPL (impl, 0)
printf ("\t%s", impl->name);
putchar ('\n');
for (i = 1; i < 8; ++i)
{
do_test (0, i, i - 1, MIDDLE_CHAR);
do_test (0, i, i, MIDDLE_CHAR);
do_test (0, i, i + 1, MIDDLE_CHAR);
}
for (i = 1; i < 8; ++i)
{
do_test (i, i, i - 1, MIDDLE_CHAR);
do_test (i, i, i, MIDDLE_CHAR);
do_test (i, i, i + 1, MIDDLE_CHAR);
}
for (i = 2; i <= 10; ++i)
{
do_test (0, 1 << i, 5000, MIDDLE_CHAR);
do_test (1, 1 << i, 5000, MIDDLE_CHAR);
}
for (i = 1; i < 8; ++i)
do_test (0, i, 5000, BIG_CHAR);
for (i = 1; i < 8; ++i)
do_test (i, i, 5000, BIG_CHAR);
for (i = 2; i <= 10; ++i)
{
do_test (0, 1 << i, 5000, BIG_CHAR);
do_test (1, 1 << i, 5000, BIG_CHAR);
}
do_random_tests ();
do_page_tests ();
return ret;
}
#include <support/test-driver.c>
|
