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/* Measure strlen functions.
Copyright (C) 2013-2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#define TEST_MAIN
#ifndef WIDE
# define TEST_NAME "strnlen"
#else
# define TEST_NAME "wcsnlen"
# define generic_strnlen generic_wcsnlen
# define memchr_strnlen wcschr_wcsnlen
#endif /* WIDE */
#include "bench-string.h"
#define BIG_CHAR MAX_CHAR
#ifndef WIDE
# define MIDDLE_CHAR 127
#else
# define MIDDLE_CHAR 1121
#endif /* WIDE */
typedef size_t (*proto_t) (const CHAR *, size_t);
size_t generic_strnlen (const CHAR *, size_t);
size_t
memchr_strnlen (const CHAR *s, size_t maxlen)
{
const CHAR *s1 = MEMCHR (s, 0, maxlen);
return (s1 == NULL) ? maxlen : s1 - s;
}
IMPL (STRNLEN, 1)
IMPL (memchr_strnlen, 0)
IMPL (generic_strnlen, 0)
static void
do_one_test (impl_t *impl, const CHAR *s, size_t maxlen, size_t exp_len)
{
size_t len = CALL (impl, s, maxlen), i, iters = INNER_LOOP_ITERS_LARGE;
timing_t start, stop, cur;
if (len != exp_len)
{
error (0, 0, "Wrong result in function %s %zd %zd", impl->name,
len, exp_len);
ret = 1;
return;
}
TIMING_NOW (start);
for (i = 0; i < iters; ++i)
{
CALL (impl, s, maxlen);
}
TIMING_NOW (stop);
TIMING_DIFF (cur, start, stop);
TIMING_PRINT_MEAN ((double) cur, (double) iters);
}
static void
do_test (size_t align, size_t len, size_t maxlen, int max_char)
{
size_t i;
align &= 63;
if ((align + len) * sizeof (CHAR) >= page_size)
return;
CHAR *buf = (CHAR *) (buf1);
for (i = 0; i < len; ++i)
buf[align + i] = 1 + 7 * i % max_char;
buf[align + len] = 0;
printf ("Length %4zd, alignment %2zd:", len, align);
FOR_EACH_IMPL (impl, 0)
do_one_test (impl, (CHAR *) (buf + align), maxlen, MIN (len, maxlen));
putchar ('\n');
}
int
test_main (void)
{
size_t i;
test_init ();
printf ("%20s", "");
FOR_EACH_IMPL (impl, 0)
printf ("\t%s", impl->name);
putchar ('\n');
for (i = 1; i < 8; ++i)
{
do_test (0, i, i - 1, MIDDLE_CHAR);
do_test (0, i, i, MIDDLE_CHAR);
do_test (0, i, i + 1, MIDDLE_CHAR);
}
for (i = 1; i < 8; ++i)
{
do_test (i, i, i - 1, MIDDLE_CHAR);
do_test (i, i, i, MIDDLE_CHAR);
do_test (i, i, i + 1, MIDDLE_CHAR);
}
for (i = 2; i <= 10; ++i)
{
do_test (0, 1 << i, 5000, MIDDLE_CHAR);
do_test (1, 1 << i, 5000, MIDDLE_CHAR);
}
for (i = 1; i < 8; ++i)
do_test (0, i, 5000, BIG_CHAR);
for (i = 1; i < 8; ++i)
do_test (i, i, 5000, BIG_CHAR);
for (i = 2; i <= 10; ++i)
{
do_test (0, 1 << i, 5000, BIG_CHAR);
do_test (1, 1 << i, 5000, BIG_CHAR);
}
return ret;
}
#include <support/test-driver.c>
#define libc_hidden_def(X)
#ifndef WIDE
# undef STRNLEN
# define STRNLEN generic_strnlen
# include <string/strnlen.c>
#else
# define WCSNLEN generic_strnlen
# include <wcsmbs/wcsnlen.c>
#endif
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