1/* Measure strspn 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 "strspn"
22#else
23# define TEST_NAME "wcsspn"
24#endif /* WIDE */
25#include "bench-string.h"
26
27#define BIG_CHAR MAX_CHAR
28
29#ifndef WIDE
30# define SIMPLE_STRSPN simple_strspn
31# define SMALL_CHAR 127
32#else
33# define SIMPLE_STRSPN simple_wcsspn
34# define SMALL_CHAR 1273
35#endif /* WIDE */
36
37typedef size_t (*proto_t) (const CHAR *, const CHAR *);
38size_t SIMPLE_STRSPN (const CHAR *, const CHAR *);
39
40IMPL (SIMPLE_STRSPN, 0)
41IMPL (STRSPN, 1)
42
43size_t
44SIMPLE_STRSPN (const CHAR *s, const CHAR *acc)
45{
46 const CHAR *r, *str = s;
47 CHAR c;
48
49 while ((c = *s++) != '\0')
50 {
51 for (r = acc; *r != '\0'; ++r)
52 if (*r == c)
53 break;
54 if (*r == '\0')
55 return s - str - 1;
56 }
57 return s - str - 1;
58}
59
60static void
61do_one_test (impl_t *impl, const CHAR *s, const CHAR *acc, size_t exp_res)
62{
63 size_t res = CALL (impl, s, acc), i, iters = INNER_LOOP_ITERS_MEDIUM;
64 timing_t start, stop, cur;
65
66 if (res != exp_res)
67 {
68 error (status: 0, errnum: 0, format: "Wrong result in function %s %p %p", impl->name,
69 (void *) res, (void *) exp_res);
70 ret = 1;
71 return;
72 }
73
74 TIMING_NOW (start);
75 for (i = 0; i < iters; ++i)
76 {
77 CALL (impl, s, acc);
78 }
79 TIMING_NOW (stop);
80
81 TIMING_DIFF (cur, start, stop);
82
83 TIMING_PRINT_MEAN ((double) cur, (double) iters);
84}
85
86static void
87do_test (size_t align, size_t pos, size_t len)
88{
89 size_t i;
90 CHAR *acc, *s;
91
92 align &= 7;
93 if ((align + pos + 10) * sizeof (CHAR) >= page_size || len > 240 || ! len)
94 return;
95
96 acc = (CHAR *) (buf2) + (random () & 255);
97 s = (CHAR *) (buf1) + align;
98
99 for (i = 0; i < len; ++i)
100 {
101 acc[i] = random () & BIG_CHAR;
102 if (!acc[i])
103 acc[i] = random () & BIG_CHAR;
104 if (!acc[i])
105 acc[i] = 1 + (random () & SMALL_CHAR);
106 }
107 acc[len] = '\0';
108
109 for (i = 0; i < pos; ++i)
110 s[i] = acc[random () % len];
111 s[pos] = random () & BIG_CHAR;
112 if (STRCHR (acc, s[pos]))
113 s[pos] = '\0';
114 else
115 {
116 for (i = pos + 1; i < pos + 10; ++i)
117 s[i] = random () & BIG_CHAR;
118 s[i] = '\0';
119 }
120
121 printf (format: "Length %4zd, alignment %2zd, acc len %2zd:", pos, align, len);
122
123 FOR_EACH_IMPL (impl, 0)
124 do_one_test (impl, s, acc, exp_res: pos);
125
126 putchar (c: '\n');
127}
128
129int
130test_main (void)
131{
132 size_t i;
133
134 test_init ();
135
136 printf (format: "%32s", "");
137 FOR_EACH_IMPL (impl, 0)
138 printf (format: "\t%s", impl->name);
139 putchar (c: '\n');
140
141 for (i = 0; i < 32; ++i)
142 {
143 do_test (align: 0, pos: 512, len: i);
144 do_test (align: i, pos: 512, len: i);
145 }
146
147 for (i = 1; i < 8; ++i)
148 {
149 do_test (align: 0, pos: 16 << i, len: 4);
150 do_test (align: i, pos: 16 << i, len: 4);
151 }
152
153 for (i = 1; i < 8; ++i)
154 do_test (align: i, pos: 64, len: 10);
155
156 for (i = 0; i < 64; ++i)
157 do_test (align: 0, pos: i, len: 6);
158
159 return ret;
160}
161
162#include <support/test-driver.c>
163

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