Fix Wundef warning for __STDC_VERSION__
[glibc.git] / benchtests / bench-strnlen.c
blobd29fd03d67d3a42ff100d5ab6a0b3e4b5d35f26f
1 /* Measure strlen functions.
2 Copyright (C) 2013-2014 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
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 <http://www.gnu.org/licenses/>. */
19 #define TEST_MAIN
20 #define TEST_NAME "strnlen"
21 #include "bench-string.h"
23 typedef size_t (*proto_t) (const char *, size_t);
24 size_t simple_strnlen (const char *, size_t);
26 IMPL (simple_strnlen, 0)
27 IMPL (strnlen, 1)
29 size_t
30 simple_strnlen (const char *s, size_t maxlen)
32 size_t i;
34 for (i = 0; i < maxlen && s[i]; ++i);
35 return i;
38 static void
39 do_one_test (impl_t *impl, const char *s, size_t maxlen, size_t exp_len)
41 size_t len = CALL (impl, s, maxlen), i, iters = INNER_LOOP_ITERS;
42 timing_t start, stop, cur;
44 if (len != exp_len)
46 error (0, 0, "Wrong result in function %s %zd %zd", impl->name,
47 len, exp_len);
48 ret = 1;
49 return;
52 TIMING_NOW (start);
53 for (i = 0; i < iters; ++i)
55 CALL (impl, s, maxlen);
57 TIMING_NOW (stop);
59 TIMING_DIFF (cur, start, stop);
61 TIMING_PRINT_MEAN ((double) cur, (double) iters);
64 static void
65 do_test (size_t align, size_t len, size_t maxlen, int max_char)
67 size_t i;
69 align &= 7;
70 if (align + len >= page_size)
71 return;
73 for (i = 0; i < len; ++i)
74 buf1[align + i] = 1 + 7 * i % max_char;
75 buf1[align + len] = 0;
77 printf ("Length %4zd, alignment %2zd:", len, align);
79 FOR_EACH_IMPL (impl, 0)
80 do_one_test (impl, (char *) (buf1 + align), maxlen, MIN (len, maxlen));
82 putchar ('\n');
85 int
86 test_main (void)
88 size_t i;
90 test_init ();
92 printf ("%20s", "");
93 FOR_EACH_IMPL (impl, 0)
94 printf ("\t%s", impl->name);
95 putchar ('\n');
97 for (i = 1; i < 8; ++i)
99 do_test (0, i, i - 1, 127);
100 do_test (0, i, i, 127);
101 do_test (0, i, i + 1, 127);
104 for (i = 1; i < 8; ++i)
106 do_test (i, i, i - 1, 127);
107 do_test (i, i, i, 127);
108 do_test (i, i, i + 1, 127);
111 for (i = 2; i <= 10; ++i)
113 do_test (0, 1 << i, 5000, 127);
114 do_test (1, 1 << i, 5000, 127);
117 for (i = 1; i < 8; ++i)
118 do_test (0, i, 5000, 255);
120 for (i = 1; i < 8; ++i)
121 do_test (i, i, 5000, 255);
123 for (i = 2; i <= 10; ++i)
125 do_test (0, 1 << i, 5000, 255);
126 do_test (1, 1 << i, 5000, 255);
129 return ret;
132 #include "../test-skeleton.c"