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/* Test and measure STRCHR functions.
Copyright (C) 1999-2023 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
#ifdef WIDE
# define TEST_NAME "wcsrchr"
#else
# define TEST_NAME "strrchr"
#endif
#include "test-string.h"
#ifdef WIDE
# include <wchar.h>
# define SIMPLE_STRRCHR simple_wcsrchr
# define STRRCHR wcsrchr
# define CHAR wchar_t
# define UCHAR wchar_t
# define BIG_CHAR WCHAR_MAX
# define SMALL_CHAR 1273
#else
# define SIMPLE_STRRCHR simple_strrchr
# define STRRCHR strrchr
# define CHAR char
# define UCHAR unsigned char
# define BIG_CHAR CHAR_MAX
# define SMALL_CHAR 127
#endif
typedef CHAR *(*proto_t) (const CHAR *, int);
IMPL (STRRCHR, 1)
/* Naive implementation to verify results. */
CHAR *
SIMPLE_STRRCHR (const CHAR *s, int c)
{
const CHAR *ret = NULL;
for (; *s != '\0'; ++s)
if (*s == (CHAR) c)
ret = s;
return (CHAR *) (c == '\0' ? s : ret);
}
static void
do_one_test (impl_t *impl, const CHAR *s, int c, CHAR *exp_res)
{
CHAR *res = CALL (impl, s, c);
if (res != exp_res)
{
error (0, 0, "Wrong result in function %s %p %p", impl->name,
res, exp_res);
ret = 1;
return;
}
}
static void
do_test (size_t align, size_t pos, size_t len, int seek_char, int max_char)
/* For wcsrchr: align here means align not in bytes,
but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t))
len for wcschr here isn't in bytes but it's number of wchar_t symbols. */
{
size_t i;
CHAR *result;
CHAR *buf = (CHAR *) buf1;
align &= 7;
if ( (align + len) * sizeof (CHAR) >= page_size)
return;
for (i = 0; i < len; ++i)
{
buf[align + i] = (random () * random ()) & max_char;
if (!buf[align + i])
buf[align + i] = (random () * random ()) & max_char;
if (!buf[align + i])
buf[align + i] = 1;
if ((i > pos || pos >= len) && buf[align + i] == seek_char)
buf[align + i] = seek_char + 10 + (random () & 15);
}
buf[align + len] = 0;
if (pos < len)
{
buf[align + pos] = seek_char;
result = (CHAR *) (buf + align + pos);
}
else if (seek_char == 0)
result = (CHAR *) (buf + align + len);
else
result = NULL;
FOR_EACH_IMPL (impl, 0)
do_one_test (impl, (CHAR *) (buf + align), seek_char, result);
}
static void
do_random_tests (void)
{
size_t i, j, n, align, pos, len;
int seek_char;
CHAR *result;
UCHAR *p = (UCHAR *) (buf1 + page_size) - 512;
for (n = 0; n < ITERATIONS; n++)
{
align = random () & (63 / sizeof (CHAR));
/* For wcsrchr: align here means align not in bytes, but in wchar_ts,
in bytes it will equal to align * (sizeof (wchar_t)).
For strrchr we need to check all alignments from 0 to 63 since
some assembly implementations have separate prolog for alignments
more 48. */
pos = random () & 511;
if (pos + align >= 511)
pos = 510 - align - (random () & 7);
len = random () & 511;
/* len for wcschr here isn't in bytes but it's number of wchar_t
symbols. */
if (pos >= len)
len = pos + (random () & 7);
if (len + align >= 512)
len = 511 - align - (random () & 7);
seek_char = random () & 255;
if (seek_char && pos == len)
{
if (pos)
--pos;
else
++len;
}
j = len + align + 64;
if (j > 512)
j = 512;
for (i = 0; i < j; i++)
{
if (i == pos + align)
p[i] = seek_char;
else if (i == len + align)
p[i] = 0;
else
{
p[i] = random () & 255;
if (((i > pos + align && i < len + align) || pos > len)
&& p[i] == seek_char)
p[i] = seek_char + 13;
if (i < len + align && !p[i])
{
p[i] = seek_char - 13;
if (!p[i])
p[i] = 140;
}
}
}
if (pos <= len)
result = (CHAR *) (p + pos + align);
else if (seek_char == 0)
result = (CHAR *) (p + len + align);
else
result = NULL;
FOR_EACH_IMPL (impl, 1)
if (CALL (impl, (CHAR *) (p + align), seek_char) != 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), 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, SMALL_CHAR);
do_test (i, 16 << i, 2048, 23, SMALL_CHAR);
}
for (i = 1; i < 8; ++i)
{
do_test (i, 64, 256, 23, SMALL_CHAR);
do_test (i, 64, 256, 23, BIG_CHAR);
}
for (i = 0; i < 32; ++i)
{
do_test (0, i, i + 1, 23, SMALL_CHAR);
do_test (0, i, i + 1, 23, BIG_CHAR);
}
for (i = 1; i < 8; ++i)
{
do_test (0, 16 << i, 2048, 0, SMALL_CHAR);
do_test (i, 16 << i, 2048, 0, SMALL_CHAR);
}
for (i = 1; i < 8; ++i)
{
do_test (i, 64, 256, 0, SMALL_CHAR);
do_test (i, 64, 256, 0, BIG_CHAR);
}
for (i = 0; i < 32; ++i)
{
do_test (0, i, i + 1, 0, SMALL_CHAR);
do_test (0, i, i + 1, 0, BIG_CHAR);
}
do_random_tests ();
return ret;
}
#include <support/test-driver.c>
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