1/* Measure STRCHR 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#ifdef WIDE
21# define TEST_NAME "wcsrchr"
22#else
23# define TEST_NAME "strrchr"
24#endif
25#include "bench-string.h"
26
27#define BIG_CHAR MAX_CHAR
28
29#ifdef WIDE
30# define SIMPLE_STRRCHR simple_wcsrchr
31# define SMALL_CHAR 1273
32#else
33# define SIMPLE_STRRCHR simple_strrchr
34# define SMALL_CHAR 127
35#endif
36
37typedef CHAR *(*proto_t) (const CHAR *, int);
38CHAR *SIMPLE_STRRCHR (const CHAR *, int);
39
40IMPL (SIMPLE_STRRCHR, 0)
41IMPL (STRRCHR, 1)
42
43CHAR *
44SIMPLE_STRRCHR (const CHAR *s, int c)
45{
46 const CHAR *ret = NULL;
47
48 for (; *s != '\0'; ++s)
49 if (*s == (CHAR) c)
50 ret = s;
51
52 return (CHAR *) (c == '\0' ? s : ret);
53}
54
55static void
56do_one_test (impl_t *impl, const CHAR *s, int c, CHAR *exp_res)
57{
58 CHAR *res = CALL (impl, s, c);
59 size_t i, iters = INNER_LOOP_ITERS8;
60 timing_t start, stop, cur;
61
62 if (res != exp_res)
63 {
64 error (status: 0, errnum: 0, format: "Wrong result in function %s %p %p", impl->name,
65 res, exp_res);
66 ret = 1;
67 return;
68 }
69
70 TIMING_NOW (start);
71 for (i = 0; i < iters; ++i)
72 {
73 CALL (impl, s, c);
74 }
75 TIMING_NOW (stop);
76
77 TIMING_DIFF (cur, start, stop);
78
79 TIMING_PRINT_MEAN ((double) cur, (double) iters);
80}
81
82static void
83do_test (size_t align, size_t pos, size_t len, int seek_char, int max_char)
84/* For wcsrchr: align here means align not in bytes,
85 but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t))
86 len for wcschr here isn't in bytes but it's number of wchar_t symbols. */
87{
88 size_t i;
89 CHAR *result;
90 CHAR *buf = (CHAR *) buf1;
91
92 align &= 7;
93 if ((align + len) * sizeof (CHAR) >= page_size)
94 return;
95
96 for (i = 0; i < len; ++i)
97 {
98 buf[align + i] = (random () * random ()) & max_char;
99 if (!buf[align + i])
100 buf[align + i] = (random () * random ()) & max_char;
101 if (!buf[align + i])
102 buf[align + i] = 1;
103 if ((i > pos || pos >= len) && buf[align + i] == seek_char)
104 buf[align + i] = seek_char + 10 + (random () & 15);
105 }
106 buf[align + len] = 0;
107
108 if (pos < len)
109 {
110 buf[align + pos] = seek_char;
111 result = (CHAR *) (buf + align + pos);
112 }
113 else if (seek_char == 0)
114 result = (CHAR *) (buf + align + len);
115 else
116 result = NULL;
117
118 printf (format: "Length %4zd, alignment in bytes %2zd:", len, align * sizeof (CHAR));
119
120 FOR_EACH_IMPL (impl, 0)
121 do_one_test (impl, s: (CHAR *) (buf + align), c: seek_char, exp_res: result);
122
123 putchar (c: '\n');
124}
125
126int
127test_main (void)
128{
129 size_t i;
130
131 test_init ();
132
133 printf (format: "%20s", "");
134 FOR_EACH_IMPL (impl, 0)
135 printf (format: "\t%s", impl->name);
136 putchar (c: '\n');
137
138 for (i = 1; i < 8; ++i)
139 {
140 do_test (align: 0, pos: 16 << i, len: 2048, seek_char: 23, SMALL_CHAR);
141 do_test (align: i, pos: 16 << i, len: 2048, seek_char: 23, SMALL_CHAR);
142 }
143
144 for (i = 1; i < 8; ++i)
145 {
146 do_test (align: i, pos: 64, len: 256, seek_char: 23, SMALL_CHAR);
147 do_test (align: i, pos: 64, len: 256, seek_char: 23, BIG_CHAR);
148 }
149
150 for (i = 0; i < 32; ++i)
151 {
152 do_test (align: 0, pos: i, len: i + 1, seek_char: 23, SMALL_CHAR);
153 do_test (align: 0, pos: i, len: i + 1, seek_char: 23, BIG_CHAR);
154 }
155
156 for (i = 1; i < 8; ++i)
157 {
158 do_test (align: 0, pos: 16 << i, len: 2048, seek_char: 0, SMALL_CHAR);
159 do_test (align: i, pos: 16 << i, len: 2048, seek_char: 0, SMALL_CHAR);
160 }
161
162 for (i = 1; i < 8; ++i)
163 {
164 do_test (align: i, pos: 64, len: 256, seek_char: 0, SMALL_CHAR);
165 do_test (align: i, pos: 64, len: 256, seek_char: 0, BIG_CHAR);
166 }
167
168 for (i = 0; i < 32; ++i)
169 {
170 do_test (align: 0, pos: i, len: i + 1, seek_char: 0, SMALL_CHAR);
171 do_test (align: 0, pos: i, len: i + 1, seek_char: 0, BIG_CHAR);
172 }
173
174 return ret;
175}
176
177#include <support/test-driver.c>
178

source code of glibc/benchtests/bench-strrchr.c