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glibc/benchtests/bench-strcasecmp.c
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/* Measure strcasecmp functions. | |
Copyright (C) 2013-2016 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/>. */ | |
#include <ctype.h> | |
#define TEST_MAIN | |
#define TEST_NAME "strcasecmp" | |
#include "bench-string.h" | |
typedef int (*proto_t) (const char *, const char *); | |
static int simple_strcasecmp (const char *, const char *); | |
static int stupid_strcasecmp (const char *, const char *); | |
IMPL (stupid_strcasecmp, 0) | |
IMPL (simple_strcasecmp, 0) | |
IMPL (strcasecmp, 1) | |
static int | |
simple_strcasecmp (const char *s1, const char *s2) | |
{ | |
int ret; | |
while ((ret = ((unsigned char) tolower (*s1) | |
- (unsigned char) tolower (*s2))) == 0 | |
&& *s1++) | |
++s2; | |
return ret; | |
} | |
static int | |
stupid_strcasecmp (const char *s1, const char *s2) | |
{ | |
size_t ns1 = strlen (s1) + 1, ns2 = strlen (s2) + 1; | |
size_t n = ns1 < ns2 ? ns1 : ns2; | |
int ret = 0; | |
while (n--) | |
{ | |
if ((ret = ((unsigned char) tolower (*s1) | |
- (unsigned char) tolower (*s2))) != 0) | |
break; | |
++s1; | |
++s2; | |
} | |
return ret; | |
} | |
static void | |
do_one_test (impl_t *impl, const char *s1, const char *s2, int exp_result) | |
{ | |
size_t i, iters = INNER_LOOP_ITERS; | |
timing_t start, stop, cur; | |
int result = CALL (impl, s1, s2); | |
if ((exp_result == 0 && result != 0) | |
|| (exp_result < 0 && result >= 0) | |
|| (exp_result > 0 && result <= 0)) | |
{ | |
error (0, 0, "Wrong result in function %s %d %d", impl->name, | |
result, exp_result); | |
ret = 1; | |
return; | |
} | |
TIMING_NOW (start); | |
for (i = 0; i < iters; ++i) | |
{ | |
CALL (impl, s1, s2); | |
} | |
TIMING_NOW (stop); | |
TIMING_DIFF (cur, start, stop); | |
TIMING_PRINT_MEAN ((double) cur, (double) iters); | |
} | |
static void | |
do_test (size_t align1, size_t align2, size_t len, int max_char, | |
int exp_result) | |
{ | |
size_t i; | |
char *s1, *s2; | |
if (len == 0) | |
return; | |
align1 &= 7; | |
if (align1 + len + 1 >= page_size) | |
return; | |
align2 &= 7; | |
if (align2 + len + 1 >= page_size) | |
return; | |
s1 = (char *) (buf1 + align1); | |
s2 = (char *) (buf2 + align2); | |
for (i = 0; i < len; i++) | |
{ | |
s1[i] = toupper (1 + 23 * i % max_char); | |
s2[i] = tolower (s1[i]); | |
} | |
s1[len] = s2[len] = 0; | |
s1[len + 1] = 23; | |
s2[len + 1] = 24 + exp_result; | |
if ((s2[len - 1] == 'z' && exp_result == -1) | |
|| (s2[len - 1] == 'a' && exp_result == 1)) | |
s1[len - 1] += exp_result; | |
else | |
s2[len - 1] -= exp_result; | |
printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2); | |
FOR_EACH_IMPL (impl, 0) | |
do_one_test (impl, s1, s2, exp_result); | |
putchar ('\n'); | |
} | |
int | |
test_main (void) | |
{ | |
size_t i; | |
test_init (); | |
printf ("%23s", ""); | |
FOR_EACH_IMPL (impl, 0) | |
printf ("\t%s", impl->name); | |
putchar ('\n'); | |
for (i = 1; i < 16; ++i) | |
{ | |
do_test (i, i, i, 127, 0); | |
do_test (i, i, i, 127, 1); | |
do_test (i, i, i, 127, -1); | |
} | |
for (i = 1; i < 10; ++i) | |
{ | |
do_test (0, 0, 2 << i, 127, 0); | |
do_test (0, 0, 2 << i, 254, 0); | |
do_test (0, 0, 2 << i, 127, 1); | |
do_test (0, 0, 2 << i, 254, 1); | |
do_test (0, 0, 2 << i, 127, -1); | |
do_test (0, 0, 2 << i, 254, -1); | |
} | |
for (i = 1; i < 8; ++i) | |
{ | |
do_test (i, 2 * i, 8 << i, 127, 0); | |
do_test (2 * i, i, 8 << i, 254, 0); | |
do_test (i, 2 * i, 8 << i, 127, 1); | |
do_test (2 * i, i, 8 << i, 254, 1); | |
do_test (i, 2 * i, 8 << i, 127, -1); | |
do_test (2 * i, i, 8 << i, 254, -1); | |
} | |
return ret; | |
} | |
#include "../test-skeleton.c" |