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
|
/* Measure strncpy functions.
Copyright (C) 2013-2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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/>. */
#ifdef WIDE
# include <wchar.h>
# define CHAR wchar_t
# define UCHAR wchar_t
# define BIG_CHAR WCHAR_MAX
# define SMALL_CHAR 1273
# define MEMCMP wmemcmp
# define MEMSET wmemset
# define STRNLEN wcsnlen
#else
# define CHAR char
# define UCHAR unsigned char
# define BIG_CHAR CHAR_MAX
# define SMALL_CHAR 127
# define MEMCMP memcmp
# define MEMSET memset
# define STRNLEN strnlen
#endif /* !WIDE */
#ifndef STRNCPY_RESULT
# define STRNCPY_RESULT(dst, len, n) dst
# define TEST_MAIN
# ifndef WIDE
# define TEST_NAME "strncpy"
# else
# define TEST_NAME "wcsncpy"
# endif /* WIDE */
# include "bench-string.h"
# ifndef WIDE
# define SIMPLE_STRNCPY simple_strncpy
# define STUPID_STRNCPY stupid_strncpy
# define STRNCPY strncpy
# else
# define SIMPLE_STRNCPY simple_wcsncpy
# define STUPID_STRNCPY stupid_wcsncpy
# define STRNCPY wcsncpy
# endif /* WIDE */
CHAR *SIMPLE_STRNCPY (CHAR *, const CHAR *, size_t);
CHAR *STUPID_STRNCPY (CHAR *, const CHAR *, size_t);
IMPL (STUPID_STRNCPY, 0)
IMPL (SIMPLE_STRNCPY, 0)
IMPL (STRNCPY, 1)
CHAR *
SIMPLE_STRNCPY (CHAR *dst, const CHAR *src, size_t n)
{
CHAR *ret = dst;
while (n--)
if ((*dst++ = *src++) == '\0')
{
while (n--)
*dst++ = '\0';
return ret;
}
return ret;
}
CHAR *
STUPID_STRNCPY (CHAR *dst, const CHAR *src, size_t n)
{
size_t nc = STRNLEN (src, n);
size_t i;
for (i = 0; i < nc; ++i)
dst[i] = src[i];
for (; i < n; ++i)
dst[i] = '\0';
return dst;
}
#endif /* !STRNCPY_RESULT */
typedef CHAR *(*proto_t) (CHAR *, const CHAR *, size_t);
static void
do_one_test (impl_t *impl, CHAR *dst, const CHAR *src, size_t len, size_t n)
{
size_t i, iters = INNER_LOOP_ITERS;
timing_t start, stop, cur;
if (CALL (impl, dst, src, n) != STRNCPY_RESULT (dst, len, n))
{
error (0, 0, "Wrong result in function %s %p %p", impl->name,
CALL (impl, dst, src, n), dst);
ret = 1;
return;
}
if (memcmp (dst, src, (len > n ? n : len) * sizeof (CHAR)) != 0)
{
error (0, 0, "Wrong result in function %s", impl->name);
ret = 1;
return;
}
if (n > len)
{
size_t i;
for (i = len; i < n; ++i)
if (dst [i] != '\0')
{
error (0, 0, "Wrong result in function %s", impl->name);
ret = 1;
return;
}
}
TIMING_NOW (start);
for (i = 0; i < iters; ++i)
{
CALL (impl, dst, src, n);
}
TIMING_NOW (stop);
TIMING_DIFF (cur, start, stop);
TIMING_PRINT_MEAN ((double) cur, (double) iters);
}
static void
do_test (size_t align1, size_t align2, size_t len, size_t n, int max_char)
{
size_t i;
CHAR *s1, *s2;
/* For wcsncpy: align1 and align2 here mean alignment not in bytes,
but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t)). */
align1 &= 7;
if ((align1 + len) * sizeof (CHAR) >= page_size)
return;
align2 &= 7;
if ((align2 + len) * sizeof (CHAR) >= page_size)
return;
s1 = (CHAR *) (buf1) + align1;
s2 = (CHAR *) (buf2) + align2;
for (i = 0; i < len; ++i)
s1[i] = 32 + 23 * i % (max_char - 32);
s1[len] = 0;
for (i = len + 1; (i + align1) * sizeof (CHAR) < page_size && i < len + 64;
++i)
s1[i] = 32 + 32 * i % (max_char - 32);
printf ("Length %4zd, n %4zd, alignment %2zd/%2zd:", len, n, align1, align2);
FOR_EACH_IMPL (impl, 0)
do_one_test (impl, s2, s1, len, n);
putchar ('\n');
}
static int
test_main (void)
{
size_t i;
test_init ();
printf ("%28s", "");
FOR_EACH_IMPL (impl, 0)
printf ("\t%s", impl->name);
putchar ('\n');
for (i = 1; i < 8; ++i)
{
do_test (i, i, 16, 16, SMALL_CHAR);
do_test (i, i, 16, 16, BIG_CHAR);
do_test (i, 2 * i, 16, 16, SMALL_CHAR);
do_test (2 * i, i, 16, 16, BIG_CHAR);
do_test (8 - i, 2 * i, 1 << i, 2 << i, SMALL_CHAR);
do_test (2 * i, 8 - i, 2 << i, 1 << i, SMALL_CHAR);
do_test (8 - i, 2 * i, 1 << i, 2 << i, BIG_CHAR);
do_test (2 * i, 8 - i, 2 << i, 1 << i, BIG_CHAR);
}
for (i = 1; i < 8; ++i)
{
do_test (0, 0, 4 << i, 8 << i, SMALL_CHAR);
do_test (0, 0, 16 << i, 8 << i, SMALL_CHAR);
do_test (8 - i, 2 * i, 4 << i, 8 << i, SMALL_CHAR);
do_test (8 - i, 2 * i, 16 << i, 8 << i, SMALL_CHAR);
}
return ret;
}
#include <support/test-driver.c>
|
GitWeb