1 | /* Measure strlen functions. |
2 | Copyright (C) 2013-2022 Free Software Foundation, Inc. |
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 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #define TEST_MAIN |
20 | #ifndef WIDE |
21 | # define TEST_NAME "strnlen" |
22 | #else |
23 | # define TEST_NAME "wcsnlen" |
24 | # define generic_strnlen generic_wcsnlen |
25 | # define memchr_strnlen wcschr_wcsnlen |
26 | #endif /* WIDE */ |
27 | #include "bench-string.h" |
28 | |
29 | #define BIG_CHAR MAX_CHAR |
30 | |
31 | #ifndef WIDE |
32 | # define MIDDLE_CHAR 127 |
33 | #else |
34 | # define MIDDLE_CHAR 1121 |
35 | #endif /* WIDE */ |
36 | |
37 | typedef size_t (*proto_t) (const CHAR *, size_t); |
38 | size_t generic_strnlen (const CHAR *, size_t); |
39 | |
40 | size_t |
41 | memchr_strnlen (const CHAR *s, size_t maxlen) |
42 | { |
43 | const CHAR *s1 = MEMCHR (s, 0, maxlen); |
44 | return (s1 == NULL) ? maxlen : s1 - s; |
45 | } |
46 | |
47 | IMPL (STRNLEN, 1) |
48 | IMPL (memchr_strnlen, 0) |
49 | IMPL (generic_strnlen, 0) |
50 | |
51 | static void |
52 | do_one_test (impl_t *impl, const CHAR *s, size_t maxlen, size_t exp_len) |
53 | { |
54 | size_t len = CALL (impl, s, maxlen), i, iters = INNER_LOOP_ITERS_LARGE; |
55 | timing_t start, stop, cur; |
56 | |
57 | if (len != exp_len) |
58 | { |
59 | error (status: 0, errnum: 0, format: "Wrong result in function %s %zd %zd" , impl->name, |
60 | len, exp_len); |
61 | ret = 1; |
62 | return; |
63 | } |
64 | |
65 | TIMING_NOW (start); |
66 | for (i = 0; i < iters; ++i) |
67 | { |
68 | CALL (impl, s, maxlen); |
69 | } |
70 | TIMING_NOW (stop); |
71 | |
72 | TIMING_DIFF (cur, start, stop); |
73 | |
74 | TIMING_PRINT_MEAN ((double) cur, (double) iters); |
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 | |
82 | align &= 63; |
83 | if ((align + len) * sizeof (CHAR) >= page_size) |
84 | return; |
85 | |
86 | CHAR *buf = (CHAR *) (buf1); |
87 | |
88 | for (i = 0; i < len; ++i) |
89 | buf[align + i] = 1 + 7 * i % max_char; |
90 | buf[align + len] = 0; |
91 | |
92 | printf (format: "Length %4zd, alignment %2zd:" , len, align); |
93 | |
94 | FOR_EACH_IMPL (impl, 0) |
95 | do_one_test (impl, s: (CHAR *) (buf + align), maxlen, MIN (len, maxlen)); |
96 | |
97 | putchar (c: '\n'); |
98 | } |
99 | |
100 | int |
101 | test_main (void) |
102 | { |
103 | size_t i; |
104 | |
105 | test_init (); |
106 | |
107 | printf (format: "%20s" , "" ); |
108 | FOR_EACH_IMPL (impl, 0) |
109 | printf (format: "\t%s" , impl->name); |
110 | putchar (c: '\n'); |
111 | |
112 | for (i = 1; i < 8; ++i) |
113 | { |
114 | do_test (align: 0, len: i, maxlen: i - 1, MIDDLE_CHAR); |
115 | do_test (align: 0, len: i, maxlen: i, MIDDLE_CHAR); |
116 | do_test (align: 0, len: i, maxlen: i + 1, MIDDLE_CHAR); |
117 | } |
118 | |
119 | for (i = 1; i < 8; ++i) |
120 | { |
121 | do_test (align: i, len: i, maxlen: i - 1, MIDDLE_CHAR); |
122 | do_test (align: i, len: i, maxlen: i, MIDDLE_CHAR); |
123 | do_test (align: i, len: i, maxlen: i + 1, MIDDLE_CHAR); |
124 | } |
125 | |
126 | for (i = 2; i <= 10; ++i) |
127 | { |
128 | do_test (align: 0, len: 1 << i, maxlen: 5000, MIDDLE_CHAR); |
129 | do_test (align: 1, len: 1 << i, maxlen: 5000, MIDDLE_CHAR); |
130 | } |
131 | |
132 | for (i = 1; i < 8; ++i) |
133 | do_test (align: 0, len: i, maxlen: 5000, BIG_CHAR); |
134 | |
135 | for (i = 1; i < 8; ++i) |
136 | do_test (align: i, len: i, maxlen: 5000, BIG_CHAR); |
137 | |
138 | for (i = 2; i <= 10; ++i) |
139 | { |
140 | do_test (align: 0, len: 1 << i, maxlen: 5000, BIG_CHAR); |
141 | do_test (align: 1, len: 1 << i, maxlen: 5000, BIG_CHAR); |
142 | } |
143 | |
144 | return ret; |
145 | } |
146 | |
147 | #include <support/test-driver.c> |
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 |
158 | |