480 lines
11 KiB
C
480 lines
11 KiB
C
/* Test strncmp and wcsncmp functions.
|
|
Copyright (C) 1999-2016 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, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#define TEST_MAIN
|
|
#ifdef WIDE
|
|
# define TEST_NAME "wcsncmp"
|
|
#else
|
|
# define TEST_NAME "strncmp"
|
|
#endif
|
|
#include "test-string.h"
|
|
|
|
#ifdef WIDE
|
|
# include <wchar.h>
|
|
|
|
# define L(str) L##str
|
|
# define STRNCMP wcsncmp
|
|
# define STRCPY wcscpy
|
|
# define STRDUP wcsdup
|
|
# define MEMCPY wmemcpy
|
|
# define SIMPLE_STRNCMP simple_wcsncmp
|
|
# define STUPID_STRNCMP stupid_wcsncmp
|
|
# define CHAR wchar_t
|
|
# define UCHAR wchar_t
|
|
# define CHARBYTES 4
|
|
# define CHAR__MAX WCHAR_MAX
|
|
# define CHAR__MIN WCHAR_MIN
|
|
|
|
/* Wcsncmp uses signed semantics for comparison, not unsigned.
|
|
Avoid using substraction since possible overflow */
|
|
int
|
|
simple_wcsncmp (const CHAR *s1, const CHAR *s2, size_t n)
|
|
{
|
|
wchar_t c1, c2;
|
|
|
|
while (n--)
|
|
{
|
|
c1 = *s1++;
|
|
c2 = *s2++;
|
|
if (c1 == L('\0') || c1 != c2)
|
|
return c1 > c2 ? 1 : (c1 < c2 ? -1 : 0);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
stupid_wcsncmp (const CHAR *s1, const CHAR *s2, size_t n)
|
|
{
|
|
wchar_t c1, c2;
|
|
size_t ns1 = wcsnlen (s1, n) + 1, ns2 = wcsnlen (s2, n) + 1;
|
|
|
|
n = ns1 < n ? ns1 : n;
|
|
n = ns2 < n ? ns2 : n;
|
|
|
|
while (n--)
|
|
{
|
|
c1 = *s1++;
|
|
c2 = *s2++;
|
|
if (c1 != c2)
|
|
return c1 > c2 ? 1 : -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#else
|
|
# define L(str) str
|
|
# define STRNCMP strncmp
|
|
# define STRCPY strcpy
|
|
# define STRDUP strdup
|
|
# define MEMCPY memcpy
|
|
# define SIMPLE_STRNCMP simple_strncmp
|
|
# define STUPID_STRNCMP stupid_strncmp
|
|
# define CHAR char
|
|
# define UCHAR unsigned char
|
|
# define CHARBYTES 1
|
|
# define CHAR__MAX CHAR_MAX
|
|
# define CHAR__MIN CHAR_MIN
|
|
|
|
/* Strncmp uses unsigned semantics for comparison. */
|
|
int
|
|
simple_strncmp (const char *s1, const char *s2, size_t n)
|
|
{
|
|
int ret = 0;
|
|
|
|
while (n-- && (ret = *(unsigned char *) s1 - * (unsigned char *) s2++) == 0
|
|
&& *s1++);
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
stupid_strncmp (const char *s1, const char *s2, size_t n)
|
|
{
|
|
size_t ns1 = strnlen (s1, n) + 1, ns2 = strnlen (s2, n) + 1;
|
|
int ret = 0;
|
|
|
|
n = ns1 < n ? ns1 : n;
|
|
n = ns2 < n ? ns2 : n;
|
|
while (n-- && (ret = *(unsigned char *) s1++ - * (unsigned char *) s2++) == 0);
|
|
return ret;
|
|
}
|
|
|
|
#endif
|
|
|
|
typedef int (*proto_t) (const CHAR *, const CHAR *, size_t);
|
|
|
|
IMPL (STUPID_STRNCMP, 0)
|
|
IMPL (SIMPLE_STRNCMP, 0)
|
|
IMPL (STRNCMP, 1)
|
|
|
|
|
|
static int
|
|
check_result (impl_t *impl, const CHAR *s1, const CHAR *s2, size_t n,
|
|
int exp_result)
|
|
{
|
|
int result = CALL (impl, s1, s2, n);
|
|
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 -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
do_one_test (impl_t *impl, const CHAR *s1, const CHAR *s2, size_t n,
|
|
int exp_result)
|
|
{
|
|
if (check_result (impl, s1, s2, n, exp_result) < 0)
|
|
return;
|
|
}
|
|
|
|
static void
|
|
do_test_limit (size_t align1, size_t align2, size_t len, size_t n, int max_char,
|
|
int exp_result)
|
|
{
|
|
size_t i, align_n;
|
|
CHAR *s1, *s2;
|
|
|
|
align1 &= ~(CHARBYTES - 1);
|
|
align2 &= ~(CHARBYTES - 1);
|
|
|
|
if (n == 0)
|
|
{
|
|
s1 = (CHAR *) (buf1 + page_size);
|
|
s2 = (CHAR *) (buf2 + page_size);
|
|
|
|
FOR_EACH_IMPL (impl, 0)
|
|
do_one_test (impl, s1, s2, n, 0);
|
|
|
|
return;
|
|
}
|
|
|
|
align1 &= 15;
|
|
align2 &= 15;
|
|
align_n = (page_size - n * CHARBYTES) & 15;
|
|
|
|
s1 = (CHAR *) (buf1 + page_size - n * CHARBYTES);
|
|
s2 = (CHAR *) (buf2 + page_size - n * CHARBYTES);
|
|
|
|
if (align1 < align_n)
|
|
s1 = (CHAR *) ((char *) s1 - (align_n - align1));
|
|
|
|
if (align2 < align_n)
|
|
s2 = (CHAR *) ((char *) s2 - (align_n - align2));
|
|
|
|
for (i = 0; i < n; i++)
|
|
s1[i] = s2[i] = 1 + 23 * i % max_char;
|
|
|
|
if (len < n)
|
|
{
|
|
s1[len] = 0;
|
|
s2[len] = 0;
|
|
if (exp_result < 0)
|
|
s2[len] = 32;
|
|
else if (exp_result > 0)
|
|
s1[len] = 64;
|
|
}
|
|
|
|
FOR_EACH_IMPL (impl, 0)
|
|
do_one_test (impl, s1, s2, n, exp_result);
|
|
}
|
|
|
|
static void
|
|
do_test (size_t align1, size_t align2, size_t len, size_t n, int max_char,
|
|
int exp_result)
|
|
{
|
|
size_t i;
|
|
CHAR *s1, *s2;
|
|
|
|
align1 &= ~(CHARBYTES - 1);
|
|
align2 &= ~(CHARBYTES - 1);
|
|
|
|
if (n == 0)
|
|
return;
|
|
|
|
align1 &= 63;
|
|
if (align1 + (n + 1) * CHARBYTES >= page_size)
|
|
return;
|
|
|
|
align2 &= 63;
|
|
if (align2 + (n + 1) * CHARBYTES >= page_size)
|
|
return;
|
|
|
|
s1 = (CHAR *) (buf1 + align1);
|
|
s2 = (CHAR *) (buf2 + align2);
|
|
|
|
for (i = 0; i < n; i++)
|
|
s1[i] = s2[i] = 1 + (23 << ((CHARBYTES - 1) * 8)) * i % max_char;
|
|
|
|
s1[n] = 24 + exp_result;
|
|
s2[n] = 23;
|
|
s1[len] = 0;
|
|
s2[len] = 0;
|
|
if (exp_result < 0)
|
|
s2[len] = 32;
|
|
else if (exp_result > 0)
|
|
s1[len] = 64;
|
|
if (len >= n)
|
|
s2[n - 1] -= exp_result;
|
|
|
|
FOR_EACH_IMPL (impl, 0)
|
|
do_one_test (impl, s1, s2, n, exp_result);
|
|
}
|
|
|
|
static void
|
|
do_page_test (size_t offset1, size_t offset2, CHAR *s2)
|
|
{
|
|
CHAR *s1;
|
|
int exp_result;
|
|
|
|
if (offset1 * CHARBYTES >= page_size || offset2 * CHARBYTES >= page_size)
|
|
return;
|
|
|
|
s1 = (CHAR *) buf1;
|
|
s1 += offset1;
|
|
s2 += offset2;
|
|
|
|
exp_result= *s1;
|
|
|
|
FOR_EACH_IMPL (impl, 0)
|
|
{
|
|
check_result (impl, s1, s2, page_size, -exp_result);
|
|
check_result (impl, s2, s1, page_size, exp_result);
|
|
}
|
|
}
|
|
|
|
static void
|
|
do_random_tests (void)
|
|
{
|
|
size_t i, j, n, align1, align2, pos, len1, len2, size;
|
|
int result;
|
|
long r;
|
|
UCHAR *p1 = (UCHAR *) (buf1 + page_size - 512 * CHARBYTES);
|
|
UCHAR *p2 = (UCHAR *) (buf2 + page_size - 512 * CHARBYTES);
|
|
|
|
for (n = 0; n < ITERATIONS; n++)
|
|
{
|
|
align1 = random () & 31;
|
|
if (random () & 1)
|
|
align2 = random () & 31;
|
|
else
|
|
align2 = align1 + (random () & 24);
|
|
pos = random () & 511;
|
|
size = random () & 511;
|
|
j = align1 > align2 ? align1 : align2;
|
|
if (pos + j >= 511)
|
|
pos = 510 - j - (random () & 7);
|
|
len1 = random () & 511;
|
|
if (pos >= len1 && (random () & 1))
|
|
len1 = pos + (random () & 7);
|
|
if (len1 + j >= 512)
|
|
len1 = 511 - j - (random () & 7);
|
|
if (pos >= len1)
|
|
len2 = len1;
|
|
else
|
|
len2 = len1 + (len1 != 511 - j ? random () % (511 - j - len1) : 0);
|
|
j = (pos > len2 ? pos : len2) + align1 + 64;
|
|
if (j > 512)
|
|
j = 512;
|
|
for (i = 0; i < j; ++i)
|
|
{
|
|
p1[i] = random () & 255;
|
|
if (i < len1 + align1 && !p1[i])
|
|
{
|
|
p1[i] = random () & 255;
|
|
if (!p1[i])
|
|
p1[i] = 1 + (random () & 127);
|
|
}
|
|
}
|
|
for (i = 0; i < j; ++i)
|
|
{
|
|
p2[i] = random () & 255;
|
|
if (i < len2 + align2 && !p2[i])
|
|
{
|
|
p2[i] = random () & 255;
|
|
if (!p2[i])
|
|
p2[i] = 1 + (random () & 127);
|
|
}
|
|
}
|
|
|
|
result = 0;
|
|
MEMCPY (p2 + align2, p1 + align1, pos);
|
|
if (pos < len1)
|
|
{
|
|
if (p2[align2 + pos] == p1[align1 + pos])
|
|
{
|
|
p2[align2 + pos] = random () & 255;
|
|
if (p2[align2 + pos] == p1[align1 + pos])
|
|
p2[align2 + pos] = p1[align1 + pos] + 3 + (random () & 127);
|
|
}
|
|
|
|
if (pos < size)
|
|
{
|
|
if (p1[align1 + pos] < p2[align2 + pos])
|
|
result = -1;
|
|
else
|
|
result = 1;
|
|
}
|
|
}
|
|
p1[len1 + align1] = 0;
|
|
p2[len2 + align2] = 0;
|
|
|
|
FOR_EACH_IMPL (impl, 1)
|
|
{
|
|
r = CALL (impl, (CHAR *) (p1 + align1), (CHAR *) (p2 + align2), size);
|
|
/* Test whether on 64-bit architectures where ABI requires
|
|
callee to promote has the promotion been done. */
|
|
asm ("" : "=g" (r) : "0" (r));
|
|
if ((r == 0 && result)
|
|
|| (r < 0 && result >= 0)
|
|
|| (r > 0 && result <= 0))
|
|
{
|
|
error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd, %zd, %zd, %zd) %ld != %d, p1 %p p2 %p",
|
|
n, impl->name, align1, align2, len1, len2, pos, size, r, result, p1, p2);
|
|
ret = 1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
check1 (void)
|
|
{
|
|
CHAR *s1 = (CHAR *) (buf1 + 0xb2c);
|
|
CHAR *s2 = (CHAR *) (buf1 + 0xfd8);
|
|
size_t i, offset;
|
|
int exp_result;
|
|
|
|
STRCPY(s1, L("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrs"));
|
|
STRCPY(s2, L("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijkLMNOPQRSTUV"));
|
|
|
|
/* Check possible overflow bug for wcsncmp */
|
|
s1[4] = CHAR__MAX;
|
|
s2[4] = CHAR__MIN;
|
|
|
|
for (offset = 0; offset < 6; offset++)
|
|
{
|
|
for (i = 0; i < 80; i++)
|
|
{
|
|
exp_result = SIMPLE_STRNCMP (s1 + offset, s2 + offset, i);
|
|
FOR_EACH_IMPL (impl, 0)
|
|
check_result (impl, s1 + offset, s2 + offset, i, exp_result);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
check2 (void)
|
|
{
|
|
size_t i;
|
|
CHAR *s1, *s2;
|
|
|
|
s1 = (CHAR *) buf1;
|
|
for (i = 0; i < (page_size / CHARBYTES) - 1; i++)
|
|
s1[i] = 23;
|
|
s1[i] = 0;
|
|
|
|
s2 = STRDUP (s1);
|
|
|
|
for (i = 0; i < 64; ++i)
|
|
do_page_test ((3988 / CHARBYTES) + i, (2636 / CHARBYTES), s2);
|
|
|
|
free (s2);
|
|
}
|
|
|
|
int
|
|
test_main (void)
|
|
{
|
|
size_t i;
|
|
|
|
test_init ();
|
|
|
|
check1 ();
|
|
check2 ();
|
|
|
|
printf ("%23s", "");
|
|
FOR_EACH_IMPL (impl, 0)
|
|
printf ("\t%s", impl->name);
|
|
putchar ('\n');
|
|
|
|
for (i =0; i < 16; ++i)
|
|
{
|
|
do_test (0, 0, 8, i, 127, 0);
|
|
do_test (0, 0, 8, i, 127, -1);
|
|
do_test (0, 0, 8, i, 127, 1);
|
|
do_test (i, i, 8, i, 127, 0);
|
|
do_test (i, i, 8, i, 127, 1);
|
|
do_test (i, i, 8, i, 127, -1);
|
|
do_test (i, 2 * i, 8, i, 127, 0);
|
|
do_test (2 * i, i, 8, i, 127, 1);
|
|
do_test (i, 3 * i, 8, i, 127, -1);
|
|
do_test (0, 0, 8, i, 255, 0);
|
|
do_test (0, 0, 8, i, 255, -1);
|
|
do_test (0, 0, 8, i, 255, 1);
|
|
do_test (i, i, 8, i, 255, 0);
|
|
do_test (i, i, 8, i, 255, 1);
|
|
do_test (i, i, 8, i, 255, -1);
|
|
do_test (i, 2 * i, 8, i, 255, 0);
|
|
do_test (2 * i, i, 8, i, 255, 1);
|
|
do_test (i, 3 * i, 8, i, 255, -1);
|
|
}
|
|
|
|
for (i = 1; i < 8; ++i)
|
|
{
|
|
do_test (0, 0, 8 << i, 16 << i, 127, 0);
|
|
do_test (0, 0, 8 << i, 16 << i, 127, 1);
|
|
do_test (0, 0, 8 << i, 16 << i, 127, -1);
|
|
do_test (0, 0, 8 << i, 16 << i, 255, 0);
|
|
do_test (0, 0, 8 << i, 16 << i, 255, 1);
|
|
do_test (0, 0, 8 << i, 16 << i, 255, -1);
|
|
do_test (8 - i, 2 * i, 8 << i, 16 << i, 127, 0);
|
|
do_test (8 - i, 2 * i, 8 << i, 16 << i, 127, 1);
|
|
do_test (2 * i, i, 8 << i, 16 << i, 255, 0);
|
|
do_test (2 * i, i, 8 << i, 16 << i, 255, 1);
|
|
}
|
|
|
|
do_test_limit (0, 0, 0, 0, 127, 0);
|
|
do_test_limit (4, 0, 21, 20, 127, 0);
|
|
do_test_limit (0, 4, 21, 20, 127, 0);
|
|
do_test_limit (8, 0, 25, 24, 127, 0);
|
|
do_test_limit (0, 8, 25, 24, 127, 0);
|
|
|
|
for (i = 0; i < 8; ++i)
|
|
{
|
|
do_test_limit (0, 0, 17 - i, 16 - i, 127, 0);
|
|
do_test_limit (0, 0, 17 - i, 16 - i, 255, 0);
|
|
do_test_limit (0, 0, 15 - i, 16 - i, 127, 0);
|
|
do_test_limit (0, 0, 15 - i, 16 - i, 127, 1);
|
|
do_test_limit (0, 0, 15 - i, 16 - i, 127, -1);
|
|
do_test_limit (0, 0, 15 - i, 16 - i, 255, 0);
|
|
do_test_limit (0, 0, 15 - i, 16 - i, 255, 1);
|
|
do_test_limit (0, 0, 15 - i, 16 - i, 255, -1);
|
|
}
|
|
|
|
do_random_tests ();
|
|
return ret;
|
|
}
|
|
|
|
#include "../test-skeleton.c"
|