1 /* Measure strsep functions.
2 Copyright (C) 2013-2023 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 #define TEST_NAME "strsep"
21 #include "bench-string.h"
22
23 typedef char *(*proto_t) (const char **, const char *);
24
25 IMPL (strsep, 1)
26
27 static void
28 do_one_test (impl_t * impl, const char *s1, const char *s2)
29 {
30 size_t i, iters = INNER_LOOP_ITERS;
31 timing_t start, stop, cur;
32
33 TIMING_NOW (start);
34 for (i = 0; i < iters; ++i)
35 {
36 const char *s1a = s1;
37 CALL (impl, &s1a, s2);
38 if (s1a != NULL)
39 ((char*)s1a)[-1] = '1';
40 }
41 TIMING_NOW (stop);
42
43 TIMING_DIFF (cur, start, stop);
44
45 TIMING_PRINT_MEAN ((double) cur, (double) iters);
46 }
47
48 static void
49 do_test (size_t align1, size_t align2, size_t len1, size_t len2, int fail)
50 {
51 char *s2 = (char *) (buf2 + align2);
52
53 /* Search for a delimiter in a string containing mostly '0', so don't
54 use '0' as a delimiter. */
55 static const char d[] = "123456789abcdefg";
56 #define dl (sizeof (d) - 1)
57 char *ss2 = s2;
58 for (size_t l = len2; l > 0; l = l > dl ? l - dl : 0)
59 {
60 size_t t = l > dl ? dl : l;
61 ss2 = mempcpy (ss2, d, t);
62 }
63 s2[len2] = '\0';
64
65 printf ("Length %4zd/%zd, alignment %2zd/%2zd, %s:",
66 len1, len2, align1, align2, fail ? "fail" : "found");
67
68 FOR_EACH_IMPL (impl, 0)
69 {
70 char *s1 = (char *) (buf1 + align1);
71 memset (s1, '0', len1);
72 if (!fail)
73 s1[len1 / 2] = '1';
74 s1[len1] = '\0';
75 do_one_test (impl, s1, s2);
76 }
77 putchar ('\n');
78 }
79
80 static int
81 test_main (void)
82 {
83 test_init ();
84
85 printf ("%23s", "");
86 FOR_EACH_IMPL (impl, 0)
87 printf ("\t%s", impl->name);
88 putchar ('\n');
89
90 for (size_t klen = 2; klen < 32; ++klen)
91 for (size_t hlen = 4 * klen; hlen < 8 * klen; hlen += klen)
92 {
93 do_test (0, 0, hlen, klen, 0);
94 do_test (0, 0, hlen, klen, 1);
95 do_test (0, 3, hlen, klen, 0);
96 do_test (0, 3, hlen, klen, 1);
97 do_test (0, 9, hlen, klen, 0);
98 do_test (0, 9, hlen, klen, 1);
99 do_test (0, 15, hlen, klen, 0);
100 do_test (0, 15, hlen, klen, 1);
101
102 do_test (3, 0, hlen, klen, 0);
103 do_test (3, 0, hlen, klen, 1);
104 do_test (3, 3, hlen, klen, 0);
105 do_test (3, 3, hlen, klen, 1);
106 do_test (3, 9, hlen, klen, 0);
107 do_test (3, 9, hlen, klen, 1);
108 do_test (3, 15, hlen, klen, 0);
109 do_test (3, 15, hlen, klen, 1);
110
111 do_test (9, 0, hlen, klen, 0);
112 do_test (9, 0, hlen, klen, 1);
113 do_test (9, 3, hlen, klen, 0);
114 do_test (9, 3, hlen, klen, 1);
115 do_test (9, 9, hlen, klen, 0);
116 do_test (9, 9, hlen, klen, 1);
117 do_test (9, 15, hlen, klen, 0);
118 do_test (9, 15, hlen, klen, 1);
119
120 do_test (15, 0, hlen, klen, 0);
121 do_test (15, 0, hlen, klen, 1);
122 do_test (15, 3, hlen, klen, 0);
123 do_test (15, 3, hlen, klen, 1);
124 do_test (15, 9, hlen, klen, 0);
125 do_test (15, 9, hlen, klen, 1);
126 do_test (15, 15, hlen, klen, 0);
127 do_test (15, 15, hlen, klen, 1);
128 }
129 do_test (0, 0, page_size - 1, 16, 0);
130 do_test (0, 0, page_size - 1, 16, 1);
131
132 return ret;
133 }
134
135 #include <support/test-driver.c>