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glibc/string/test-memchr.c
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/* Test and measure memchr functions. | |
Copyright (C) 1999, 2002, 2003, 2005 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
Written by Jakub Jelinek <jakub@redhat.com>, 1999. | |
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, write to the Free | |
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
02111-1307 USA. */ | |
#define TEST_MAIN | |
#include "test-string.h" | |
typedef char *(*proto_t) (const char *, int, size_t); | |
char *simple_memchr (const char *, int, size_t); | |
IMPL (simple_memchr, 0) | |
IMPL (memchr, 1) | |
char * | |
simple_memchr (const char *s, int c, size_t n) | |
{ | |
while (n--) | |
if (*s++ == (char) c) | |
return (char *) s - 1; | |
return NULL; | |
} | |
static void | |
do_one_test (impl_t *impl, const char *s, int c, size_t n, char *exp_res) | |
{ | |
char *res = CALL (impl, s, c, n); | |
if (res != exp_res) | |
{ | |
error (0, 0, "Wrong result in function %s %p %p", impl->name, | |
res, exp_res); | |
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, s, c, 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 align, size_t pos, size_t len, int seek_char) | |
{ | |
size_t i; | |
char *result; | |
align &= 7; | |
if (align + len >= page_size) | |
return; | |
for (i = 0; i < len; ++i) | |
{ | |
buf1[align + i] = 1 + 23 * i % 127; | |
if (buf1[align + i] == seek_char) | |
buf1[align + i] = seek_char + 1; | |
} | |
buf1[align + len] = 0; | |
if (pos < len) | |
{ | |
buf1[align + pos] = seek_char; | |
buf1[align + len] = -seek_char; | |
result = (char *) (buf1 + align + pos); | |
} | |
else | |
{ | |
result = NULL; | |
buf1[align + len] = seek_char; | |
} | |
if (HP_TIMING_AVAIL) | |
printf ("Length %4zd, alignment %2zd:", pos, align); | |
FOR_EACH_IMPL (impl, 0) | |
do_one_test (impl, (char *) (buf1 + align), seek_char, len, result); | |
if (HP_TIMING_AVAIL) | |
putchar ('\n'); | |
} | |
static void | |
do_random_tests (void) | |
{ | |
size_t i, j, n, align, pos, len; | |
int seek_char; | |
char *result; | |
unsigned char *p = buf1 + page_size - 512; | |
for (n = 0; n < ITERATIONS; n++) | |
{ | |
align = random () & 15; | |
pos = random () & 511; | |
if (pos + align >= 512) | |
pos = 511 - align - (random () & 7); | |
len = random () & 511; | |
if (pos >= len) | |
len = pos + (random () & 7); | |
if (len + align >= 512) | |
len = 512 - align - (random () & 7); | |
seek_char = random () & 255; | |
j = len + align + 64; | |
if (j > 512) | |
j = 512; | |
for (i = 0; i < j; i++) | |
{ | |
if (i == pos + align) | |
p[i] = seek_char; | |
else | |
{ | |
p[i] = random () & 255; | |
if (i < pos + align && p[i] == seek_char) | |
p[i] = seek_char + 13; | |
} | |
} | |
if (pos < len) | |
result = (char *) (p + pos + align); | |
else | |
result = NULL; | |
FOR_EACH_IMPL (impl, 1) | |
if (CALL (impl, (char *) (p + align), seek_char, len) != result) | |
{ | |
error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %d, %zd, %zd) %p != %p, p %p", | |
n, impl->name, align, seek_char, len, pos, | |
CALL (impl, (char *) (p + align), seek_char, len), | |
result, 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'); | |
for (i = 1; i < 8; ++i) | |
{ | |
do_test (0, 16 << i, 2048, 23); | |
do_test (i, 64, 256, 23); | |
do_test (0, 16 << i, 2048, 0); | |
do_test (i, 64, 256, 0); | |
} | |
for (i = 1; i < 32; ++i) | |
{ | |
do_test (0, i, i + 1, 23); | |
do_test (0, i, i + 1, 0); | |
} | |
do_random_tests (); | |
return ret; | |
} | |
#include "../test-skeleton.c" |