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97020474 | 1 | /* Measure strlen functions. |
2b778ceb | 2 | Copyright (C) 2013-2021 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 | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
97020474 SP |
18 | |
19 | #define TEST_MAIN | |
fcf40ebe SL |
20 | #ifndef WIDE |
21 | # define TEST_NAME "strnlen" | |
22 | #else | |
23 | # define TEST_NAME "wcsnlen" | |
648279f4 WD |
24 | # define generic_strnlen generic_wcsnlen |
25 | # define memchr_strnlen wcschr_wcsnlen | |
fcf40ebe | 26 | #endif /* WIDE */ |
97020474 SP |
27 | #include "bench-string.h" |
28 | ||
90d3320d WD |
29 | #define BIG_CHAR MAX_CHAR |
30 | ||
fcf40ebe | 31 | #ifndef WIDE |
fcf40ebe | 32 | # define MIDDLE_CHAR 127 |
fcf40ebe | 33 | #else |
fcf40ebe | 34 | # define MIDDLE_CHAR 1121 |
fcf40ebe SL |
35 | #endif /* WIDE */ |
36 | ||
37 | typedef size_t (*proto_t) (const CHAR *, size_t); | |
648279f4 | 38 | size_t generic_strnlen (const CHAR *, size_t); |
97020474 SP |
39 | |
40 | size_t | |
648279f4 | 41 | memchr_strnlen (const CHAR *s, size_t maxlen) |
97020474 | 42 | { |
648279f4 WD |
43 | const CHAR *s1 = MEMCHR (s, 0, maxlen); |
44 | return (s1 == NULL) ? maxlen : s1 - s; | |
97020474 SP |
45 | } |
46 | ||
648279f4 WD |
47 | IMPL (STRNLEN, 1) |
48 | IMPL (memchr_strnlen, 0) | |
49 | IMPL (generic_strnlen, 0) | |
50 | ||
97020474 | 51 | static void |
fcf40ebe | 52 | do_one_test (impl_t *impl, const CHAR *s, size_t maxlen, size_t exp_len) |
97020474 | 53 | { |
afe23eb0 | 54 | size_t len = CALL (impl, s, maxlen), i, iters = INNER_LOOP_ITERS_LARGE; |
44558701 WN |
55 | timing_t start, stop, cur; |
56 | ||
97020474 SP |
57 | if (len != exp_len) |
58 | { | |
59 | error (0, 0, "Wrong result in function %s %zd %zd", impl->name, | |
60 | len, exp_len); | |
61 | ret = 1; | |
62 | return; | |
63 | } | |
64 | ||
44558701 WN |
65 | TIMING_NOW (start); |
66 | for (i = 0; i < iters; ++i) | |
97020474 | 67 | { |
44558701 | 68 | CALL (impl, s, maxlen); |
97020474 | 69 | } |
44558701 WN |
70 | TIMING_NOW (stop); |
71 | ||
72 | TIMING_DIFF (cur, start, stop); | |
73 | ||
74 | TIMING_PRINT_MEAN ((double) cur, (double) iters); | |
97020474 SP |
75 | } |
76 | ||
77 | static void | |
78 | do_test (size_t align, size_t len, size_t maxlen, int max_char) | |
79 | { | |
80 | size_t i; | |
81 | ||
fcf40ebe SL |
82 | align &= 63; |
83 | if ((align + len) * sizeof (CHAR) >= page_size) | |
97020474 SP |
84 | return; |
85 | ||
fcf40ebe SL |
86 | CHAR *buf = (CHAR *) (buf1); |
87 | ||
97020474 | 88 | for (i = 0; i < len; ++i) |
fcf40ebe SL |
89 | buf[align + i] = 1 + 7 * i % max_char; |
90 | buf[align + len] = 0; | |
97020474 | 91 | |
44558701 | 92 | printf ("Length %4zd, alignment %2zd:", len, align); |
97020474 SP |
93 | |
94 | FOR_EACH_IMPL (impl, 0) | |
fcf40ebe | 95 | do_one_test (impl, (CHAR *) (buf + align), maxlen, MIN (len, maxlen)); |
97020474 | 96 | |
44558701 | 97 | putchar ('\n'); |
97020474 SP |
98 | } |
99 | ||
100 | int | |
101 | test_main (void) | |
102 | { | |
103 | size_t i; | |
104 | ||
105 | test_init (); | |
106 | ||
107 | printf ("%20s", ""); | |
108 | FOR_EACH_IMPL (impl, 0) | |
109 | printf ("\t%s", impl->name); | |
110 | putchar ('\n'); | |
111 | ||
112 | for (i = 1; i < 8; ++i) | |
113 | { | |
fcf40ebe SL |
114 | do_test (0, i, i - 1, MIDDLE_CHAR); |
115 | do_test (0, i, i, MIDDLE_CHAR); | |
116 | do_test (0, i, i + 1, MIDDLE_CHAR); | |
97020474 SP |
117 | } |
118 | ||
119 | for (i = 1; i < 8; ++i) | |
120 | { | |
fcf40ebe SL |
121 | do_test (i, i, i - 1, MIDDLE_CHAR); |
122 | do_test (i, i, i, MIDDLE_CHAR); | |
123 | do_test (i, i, i + 1, MIDDLE_CHAR); | |
97020474 SP |
124 | } |
125 | ||
126 | for (i = 2; i <= 10; ++i) | |
127 | { | |
fcf40ebe SL |
128 | do_test (0, 1 << i, 5000, MIDDLE_CHAR); |
129 | do_test (1, 1 << i, 5000, MIDDLE_CHAR); | |
97020474 SP |
130 | } |
131 | ||
132 | for (i = 1; i < 8; ++i) | |
fcf40ebe | 133 | do_test (0, i, 5000, BIG_CHAR); |
97020474 SP |
134 | |
135 | for (i = 1; i < 8; ++i) | |
fcf40ebe | 136 | do_test (i, i, 5000, BIG_CHAR); |
97020474 SP |
137 | |
138 | for (i = 2; i <= 10; ++i) | |
139 | { | |
fcf40ebe SL |
140 | do_test (0, 1 << i, 5000, BIG_CHAR); |
141 | do_test (1, 1 << i, 5000, BIG_CHAR); | |
97020474 SP |
142 | } |
143 | ||
144 | return ret; | |
145 | } | |
146 | ||
b598e134 | 147 | #include <support/test-driver.c> |
648279f4 WD |
148 | |
149 | #define libc_hidden_def(X) | |
150 | #ifndef WIDE | |
151 | # undef STRNLEN | |
152 | # define STRNLEN generic_strnlen | |
153 | # include <string/strnlen.c> | |
154 | #else | |
155 | # define WCSNLEN generic_strnlen | |
156 | # include <wcsmbs/wcsnlen.c> | |
157 | #endif |