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/* Test and measure STRLEN functions.
Copyright (C) 1999-2022 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 "strlen"
#else
# define TEST_NAME "wcslen"
#endif
#include "test-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);
if (len != exp_len)
{
error (0, 0, "Wrong result in function %s %zd %zd", impl->name,
len, exp_len);
ret = 1;
return;
}
}
static void
do_test (size_t align, size_t len)
{
size_t i;
align &= (getpagesize () / sizeof (CHAR)) - 1;
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;
FOR_EACH_IMPL (impl, 0)
do_one_test (impl, (CHAR *) (buf + align), len);
}
static void
do_random_tests (void)
{
size_t i, j, n, align, len;
CHAR *p = (CHAR *) (buf1 + page_size - 512 * sizeof (CHAR));
for (n = 0; n < ITERATIONS; n++)
{
align = random () & 15;
len = random () & 511;
if (len + align > 510)
len = 511 - align - (random () & 7);
j = len + align + 64;
if (j > 512)
j = 512;
for (i = 0; i < j; i++)
{
if (i == len + align)
p[i] = 0;
else
{
p[i] = random () & 255;
if (i >= align && i < len + align && !p[i])
p[i] = (random () & 127) + 1;
}
}
FOR_EACH_IMPL (impl, 1)
if (CALL (impl, (CHAR *) (p + align)) != len)
{
error (0, 0, "Iteration %zd - wrong result in function %s (%zd) %zd != %zd, p %p",
n, impl->name, align, CALL (impl, (CHAR *) (p + align)),
len, p);
ret = 1;
}
}
}
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));
}
/* Test strings near page boundary */
size_t maxlength = 64 / sizeof (CHAR) - 1;
size_t pagesize = getpagesize () / sizeof (CHAR);
for (i = maxlength ; i > 1; --i)
{
/* String stays on the same page. */
do_test (pagesize - i, i - 1);
/* String crosses page boundary. */
do_test (pagesize - i, maxlength);
}
do_random_tests ();
return ret;
}
#include <support/test-driver.c>
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