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/* Measure STRLEN functions.
Copyright (C) 2013-2017 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
<http://www.gnu.org/licenses/>. */
#define TEST_MAIN
#ifndef WIDE
# define TEST_NAME "strlen"
#else
# define TEST_NAME "wcslen"
#endif
#include "bench-string.h"
#ifndef WIDE
# define STRLEN strlen
# define CHAR char
# define MAX_CHAR CHAR_MAX
#else
# include <wchar.h>
# define STRLEN wcslen
# define CHAR wchar_t
# define MAX_CHAR WCHAR_MAX
#endif
typedef size_t (*proto_t) (const CHAR *);
size_t
simple_STRLEN (const CHAR *s)
{
const CHAR *p;
for (p = s; *p; ++p);
return p - s;
}
#ifndef WIDE
size_t
builtin_strlen (const CHAR *p)
{
return __builtin_strlen (p);
}
IMPL (builtin_strlen, 0)
#endif
IMPL (simple_STRLEN, 0)
IMPL (STRLEN, 1)
static void
do_one_test (impl_t *impl, const CHAR *s, size_t exp_len)
{
size_t len = CALL (impl, s), i, iters = INNER_LOOP_ITERS;
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);
}
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 i;
align &= 63;
if (align + sizeof(CHAR) * len >= page_size)
return;
CHAR *buf = (CHAR *) (buf1);
for (i = 0; i < len; ++i)
buf[align + i] = 1 + 11111 * 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), len);
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');
/* Checking with only 4 * N alignments for wcslen, other alignments are wrong for wchar_t type arrays*/
for (i = 1; i < 8; ++i)
{
do_test (sizeof(CHAR) * i, i);
do_test (0, i);
}
for (i = 2; i <= 12; ++i)
{
do_test (0, 1 << i);
do_test (sizeof(CHAR) * 7, 1 << i);
do_test (sizeof(CHAR) * i, 1 << i);
do_test (sizeof(CHAR) * i, (size_t)((1 << i) / 1.5));
}
return ret;
}
#include <support/test-driver.c>
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