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/* Measure strncpy functions.
Copyright (C) 2013 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/>. */
#ifndef STRNCPY_RESULT
# define STRNCPY_RESULT(dst, len, n) dst
# define TEST_MAIN
# define TEST_NAME "strncpy"
# include "bench-string.h"
char *simple_strncpy (char *, const char *, size_t);
char *stupid_strncpy (char *, const char *, size_t);
IMPL (stupid_strncpy, 0)
IMPL (simple_strncpy, 0)
IMPL (strncpy, 1)
char *
simple_strncpy (char *dst, const char *src, size_t n)
{
char *ret = dst;
while (n--)
if ((*dst++ = *src++) == '\0')
{
while (n--)
*dst++ = '\0';
return ret;
}
return ret;
}
char *
stupid_strncpy (char *dst, const char *src, size_t n)
{
size_t nc = strnlen (src, n);
size_t i;
for (i = 0; i < nc; ++i)
dst[i] = src[i];
for (; i < n; ++i)
dst[i] = '\0';
return dst;
}
#endif
typedef char *(*proto_t) (char *, const char *, size_t);
static void
do_one_test (impl_t *impl, char *dst, const char *src, size_t len, size_t n)
{
if (CALL (impl, dst, src, n) != STRNCPY_RESULT (dst, len, n))
{
error (0, 0, "Wrong result in function %s %p %p", impl->name,
CALL (impl, dst, src, n), dst);
ret = 1;
return;
}
if (memcmp (dst, src, len > n ? n : len) != 0)
{
error (0, 0, "Wrong result in function %s", impl->name);
ret = 1;
return;
}
if (n > len)
{
size_t i;
for (i = len; i < n; ++i)
if (dst [i] != '\0')
{
error (0, 0, "Wrong result in function %s", impl->name);
ret = 1;
return;
}
}
if (HP_TIMING_AVAIL)
{
hp_timing_t start __attribute__ ((unused));
hp_timing_t stop __attribute__ ((unused));
hp_timing_t best_time = ~ (hp_timing_t) 0;
size_t i;
for (i = 0; i < 32; ++i)
{
HP_TIMING_NOW (start);
CALL (impl, dst, src, n);
HP_TIMING_NOW (stop);
HP_TIMING_BEST (best_time, start, stop);
}
printf ("\t%zd", (size_t) best_time);
}
}
static void
do_test (size_t align1, size_t align2, size_t len, size_t n, int max_char)
{
size_t i;
char *s1, *s2;
align1 &= 7;
if (align1 + len >= page_size)
return;
align2 &= 7;
if (align2 + len >= page_size)
return;
s1 = (char *) (buf1 + align1);
s2 = (char *) (buf2 + align2);
for (i = 0; i < len; ++i)
s1[i] = 32 + 23 * i % (max_char - 32);
s1[len] = 0;
for (i = len + 1; i + align1 < page_size && i < len + 64; ++i)
s1[i] = 32 + 32 * i % (max_char - 32);
if (HP_TIMING_AVAIL)
printf ("Length %4zd, n %4zd, alignment %2zd/%2zd:", len, n, align1, align2);
FOR_EACH_IMPL (impl, 0)
do_one_test (impl, s2, s1, len, n);
if (HP_TIMING_AVAIL)
putchar ('\n');
}
int
test_main (void)
{
size_t i;
test_init ();
printf ("%28s", "");
FOR_EACH_IMPL (impl, 0)
printf ("\t%s", impl->name);
putchar ('\n');
for (i = 1; i < 8; ++i)
{
do_test (i, i, 16, 16, 127);
do_test (i, i, 16, 16, 255);
do_test (i, 2 * i, 16, 16, 127);
do_test (2 * i, i, 16, 16, 255);
do_test (8 - i, 2 * i, 1 << i, 2 << i, 127);
do_test (2 * i, 8 - i, 2 << i, 1 << i, 127);
do_test (8 - i, 2 * i, 1 << i, 2 << i, 255);
do_test (2 * i, 8 - i, 2 << i, 1 << i, 255);
}
for (i = 1; i < 8; ++i)
{
do_test (0, 0, 4 << i, 8 << i, 127);
do_test (0, 0, 16 << i, 8 << i, 127);
do_test (8 - i, 2 * i, 4 << i, 8 << i, 127);
do_test (8 - i, 2 * i, 16 << i, 8 << i, 127);
}
return ret;
}
#include "../test-skeleton.c"
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