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
|
/* Measure strncat functions.
Copyright (C) 2013-2020 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
<https://www.gnu.org/licenses/>. */
#define TEST_MAIN
#ifndef WIDE
# define TEST_NAME "strncat"
#else
# define TEST_NAME "wcsncat"
# define generic_strncat generic_wcsncat
#endif /* WIDE */
#include "bench-string.h"
#define BIG_CHAR MAX_CHAR
#ifndef WIDE
# define SMALL_CHAR 127
#else
# define SMALL_CHAR 1273
#endif /* WIDE */
typedef CHAR *(*proto_t) (CHAR *, const CHAR *, size_t);
CHAR *
generic_strncat (CHAR *dst, const CHAR *src, size_t n)
{
CHAR *end = dst + STRLEN (dst);
n = STRNLEN (src, n);
end[n] = 0;
MEMCPY (end, src, n);
return dst;
}
IMPL (STRNCAT, 2)
IMPL (generic_strncat, 0)
static void
do_one_test (impl_t *impl, CHAR *dst, const CHAR *src, size_t n)
{
size_t k = STRLEN (dst), i, iters = INNER_LOOP_ITERS8;
timing_t start, stop, cur;
if (CALL (impl, dst, src, n) != dst)
{
error (0, 0, "Wrong result in function %s %p != %p", impl->name,
CALL (impl, dst, src, n), dst);
ret = 1;
return;
}
size_t len = STRLEN (src);
if (MEMCMP (dst + k, src, len + 1 > n ? n : len + 1) != 0)
{
error (0, 0, "Incorrect concatenation in function %s",
impl->name);
ret = 1;
return;
}
if (n < len && dst[k + n] != '\0')
{
error (0, 0, "There is no zero in the end of output string in %s",
impl->name);
ret = 1;
return;
}
TIMING_NOW (start);
for (i = 0; i < iters; ++i)
{
dst[k] = '\0';
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 len1, size_t len2,
size_t n, int max_char)
{
size_t i;
CHAR *s1, *s2;
align1 &= 7;
if ((align1 + len1) * sizeof (CHAR) >= page_size)
return;
if ((align1 + n) * sizeof (CHAR) > page_size)
return;
align2 &= 7;
if ((align2 + len1 + len2) * sizeof (CHAR) >= page_size)
return;
if ((align2 + len1 + n) * sizeof (CHAR) > page_size)
return;
s1 = (CHAR *) (buf1) + align1;
s2 = (CHAR *) (buf2) + align2;
for (i = 0; i < len1; ++i)
s1[i] = 32 + 23 * i % (max_char - 32);
s1[len1] = '\0';
for (i = 0; i < len2; i++)
s2[i] = 32 + 23 * i % (max_char - 32);
printf ("Length %4zd/%4zd, alignment %2zd/%2zd, N %4zd:",
len1, len2, align1, align2, n);
FOR_EACH_IMPL (impl, 0)
{
s2[len2] = '\0';
do_one_test (impl, s2, s1, n);
}
putchar ('\n');
}
int
main (void)
{
size_t i, n;
test_init ();
printf ("%28s", "");
FOR_EACH_IMPL (impl, 0)
printf ("\t%s", impl->name);
putchar ('\n');
for (n = 2; n <= 2048; n*=4)
{
do_test (0, 2, 2, 2, n, SMALL_CHAR);
do_test (0, 0, 4, 4, n, SMALL_CHAR);
do_test (4, 0, 4, 4, n, BIG_CHAR);
do_test (0, 0, 8, 8, n, SMALL_CHAR);
do_test (0, 8, 8, 8, n, SMALL_CHAR);
for (i = 1; i < 8; ++i)
{
do_test (0, 0, 8 << i, 8 << i, n, SMALL_CHAR);
do_test (8 - i, 2 * i, 8 << i, 8 << i, n, SMALL_CHAR);
do_test (0, 0, 8 << i, 2 << i, n, SMALL_CHAR);
do_test (8 - i, 2 * i, 8 << i, 2 << i, n, SMALL_CHAR);
}
for (i = 1; i < 8; ++i)
{
do_test (i, 2 * i, 8 << i, 1, n, SMALL_CHAR);
do_test (2 * i, i, 8 << i, 1, n, BIG_CHAR);
do_test (i, i, 8 << i, 10, n, SMALL_CHAR);
}
}
return ret;
}
|
