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97020474 | 1 | /* Measure strncpy functions. |
d4697bc9 | 2 | Copyright (C) 2013-2014 Free Software Foundation, Inc. |
97020474 SP |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
17 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #ifndef STRNCPY_RESULT | |
20 | # define STRNCPY_RESULT(dst, len, n) dst | |
21 | # define TEST_MAIN | |
22 | # define TEST_NAME "strncpy" | |
23 | # include "bench-string.h" | |
24 | ||
25 | char *simple_strncpy (char *, const char *, size_t); | |
26 | char *stupid_strncpy (char *, const char *, size_t); | |
27 | ||
28 | IMPL (stupid_strncpy, 0) | |
29 | IMPL (simple_strncpy, 0) | |
30 | IMPL (strncpy, 1) | |
31 | ||
32 | char * | |
33 | simple_strncpy (char *dst, const char *src, size_t n) | |
34 | { | |
35 | char *ret = dst; | |
36 | while (n--) | |
37 | if ((*dst++ = *src++) == '\0') | |
38 | { | |
39 | while (n--) | |
40 | *dst++ = '\0'; | |
41 | return ret; | |
42 | } | |
43 | return ret; | |
44 | } | |
45 | ||
46 | char * | |
47 | stupid_strncpy (char *dst, const char *src, size_t n) | |
48 | { | |
49 | size_t nc = strnlen (src, n); | |
50 | size_t i; | |
51 | ||
52 | for (i = 0; i < nc; ++i) | |
53 | dst[i] = src[i]; | |
54 | for (; i < n; ++i) | |
55 | dst[i] = '\0'; | |
56 | return dst; | |
57 | } | |
58 | #endif | |
59 | ||
60 | typedef char *(*proto_t) (char *, const char *, size_t); | |
61 | ||
62 | static void | |
63 | do_one_test (impl_t *impl, char *dst, const char *src, size_t len, size_t n) | |
64 | { | |
44558701 WN |
65 | size_t i, iters = INNER_LOOP_ITERS; |
66 | timing_t start, stop, cur; | |
67 | ||
97020474 SP |
68 | if (CALL (impl, dst, src, n) != STRNCPY_RESULT (dst, len, n)) |
69 | { | |
70 | error (0, 0, "Wrong result in function %s %p %p", impl->name, | |
71 | CALL (impl, dst, src, n), dst); | |
72 | ret = 1; | |
73 | return; | |
74 | } | |
75 | ||
76 | if (memcmp (dst, src, len > n ? n : len) != 0) | |
77 | { | |
78 | error (0, 0, "Wrong result in function %s", impl->name); | |
79 | ret = 1; | |
80 | return; | |
81 | } | |
82 | ||
83 | if (n > len) | |
84 | { | |
85 | size_t i; | |
86 | ||
87 | for (i = len; i < n; ++i) | |
88 | if (dst [i] != '\0') | |
89 | { | |
90 | error (0, 0, "Wrong result in function %s", impl->name); | |
91 | ret = 1; | |
92 | return; | |
93 | } | |
94 | } | |
95 | ||
44558701 WN |
96 | TIMING_NOW (start); |
97 | for (i = 0; i < iters; ++i) | |
97020474 | 98 | { |
44558701 WN |
99 | CALL (impl, dst, src, n); |
100 | } | |
101 | TIMING_NOW (stop); | |
97020474 | 102 | |
44558701 | 103 | TIMING_DIFF (cur, start, stop); |
97020474 | 104 | |
44558701 | 105 | TIMING_PRINT_MEAN ((double) cur, (double) iters); |
97020474 SP |
106 | } |
107 | ||
108 | static void | |
109 | do_test (size_t align1, size_t align2, size_t len, size_t n, int max_char) | |
110 | { | |
111 | size_t i; | |
112 | char *s1, *s2; | |
113 | ||
114 | align1 &= 7; | |
115 | if (align1 + len >= page_size) | |
116 | return; | |
117 | ||
118 | align2 &= 7; | |
119 | if (align2 + len >= page_size) | |
120 | return; | |
121 | ||
122 | s1 = (char *) (buf1 + align1); | |
123 | s2 = (char *) (buf2 + align2); | |
124 | ||
125 | for (i = 0; i < len; ++i) | |
126 | s1[i] = 32 + 23 * i % (max_char - 32); | |
127 | s1[len] = 0; | |
128 | for (i = len + 1; i + align1 < page_size && i < len + 64; ++i) | |
129 | s1[i] = 32 + 32 * i % (max_char - 32); | |
130 | ||
44558701 | 131 | printf ("Length %4zd, n %4zd, alignment %2zd/%2zd:", len, n, align1, align2); |
97020474 SP |
132 | |
133 | FOR_EACH_IMPL (impl, 0) | |
134 | do_one_test (impl, s2, s1, len, n); | |
135 | ||
44558701 | 136 | putchar ('\n'); |
97020474 SP |
137 | } |
138 | ||
139 | int | |
140 | test_main (void) | |
141 | { | |
142 | size_t i; | |
143 | ||
144 | test_init (); | |
145 | ||
146 | printf ("%28s", ""); | |
147 | FOR_EACH_IMPL (impl, 0) | |
148 | printf ("\t%s", impl->name); | |
149 | putchar ('\n'); | |
150 | ||
151 | for (i = 1; i < 8; ++i) | |
152 | { | |
153 | do_test (i, i, 16, 16, 127); | |
154 | do_test (i, i, 16, 16, 255); | |
155 | do_test (i, 2 * i, 16, 16, 127); | |
156 | do_test (2 * i, i, 16, 16, 255); | |
157 | do_test (8 - i, 2 * i, 1 << i, 2 << i, 127); | |
158 | do_test (2 * i, 8 - i, 2 << i, 1 << i, 127); | |
159 | do_test (8 - i, 2 * i, 1 << i, 2 << i, 255); | |
160 | do_test (2 * i, 8 - i, 2 << i, 1 << i, 255); | |
161 | } | |
162 | ||
163 | for (i = 1; i < 8; ++i) | |
164 | { | |
165 | do_test (0, 0, 4 << i, 8 << i, 127); | |
166 | do_test (0, 0, 16 << i, 8 << i, 127); | |
167 | do_test (8 - i, 2 * i, 4 << i, 8 << i, 127); | |
168 | do_test (8 - i, 2 * i, 16 << i, 8 << i, 127); | |
169 | } | |
170 | ||
171 | return ret; | |
172 | } | |
173 | ||
174 | #include "../test-skeleton.c" |