/* See LICENSE file for copyright and license details. */
#include "common.h"
#ifndef TEST
void *
libsimple_memelem(const void *hay_, const void *sub_, size_t width, size_t n)
{
switch (width) {
case 0:
return REMOVE_CONST(hay_, void *);
case 1:
return memchr(hay_, *(const char *)sub_, n);
case 2:
{
const uint16_t *hay = hay_;
uint16_t sub = *(const uint16_t *)sub_;
for (; n--; hay++)
if (*hay == sub)
return REMOVE_CONST(hay, uint16_t *);
break;
}
case 4:
{
const uint32_t *hay = hay_;
uint32_t sub = *(const uint32_t *)sub_;
for (; n--; hay++)
if (*hay == sub)
return REMOVE_CONST(hay, uint32_t *);
break;
}
case 8:
{
const uint64_t *hay = hay_;
uint64_t sub = *(const uint64_t *)sub_;
for (; n--; hay++)
if (*hay == sub)
return REMOVE_CONST(hay, uint64_t *);
break;
}
default:
{
const char *hay = hay_;
const char *sub = sub_;
size_t i;
for (; n--; hay += width) {
for (i = 0; i < width; i++)
if (hay[i] != sub[i])
goto next;
return REMOVE_CONST(hay, char *);
next:;
}
break;
}
}
return NULL;
}
#else
#include "test.h"
int
main(void)
{
assert(!strcmpnul(libsimple_memelem("12345634", "", 0, 8), "12345634"));
assert(!strcmpnul(libsimple_memelem("12345634", "", 0, 0), "12345634"));
assert(!strcmpnul(libsimple_memelem("12345634", "3", 1, 8), "345634"));
assert(!libsimple_memelem("12345634", "x", 1, 8));
assert(!strcmpnul(libsimple_memelem("13456342", "3", 1, 8), "3456342"));
assert(!libsimple_memelem("12345634", "3", 1, 0));
assert(!strcmpnul(libsimple_memelem("12345634", "34", 2, 4), "345634"));
assert(!libsimple_memelem("12345634", "xx", 2, 4));
assert(!libsimple_memelem("13456342", "34", 2, 4));
assert(!libsimple_memelem("12345634", "34", 2, 0));
assert(!strcmpnul(libsimple_memelem("abcd1234abcd1234", "1234", 4, 4), "1234abcd1234"));
assert(!libsimple_memelem("abcd1234abcd1234", "zzzz", 4, 4));
assert(!libsimple_memelem("cd1234abcd1234ab", "1234", 4, 4));
assert(!libsimple_memelem("abcd1234abcd1234", "1234", 4, 0));
assert(!strcmpnul(libsimple_memelem("abcdefgh12345678abcdefgh12345678", "12345678", 8, 4), "12345678abcdefgh12345678"));
assert(!libsimple_memelem("abcdefgh12345678abcdefgh12345678", "zzzzzzzz", 8, 4));
assert(!libsimple_memelem("efgh12345678abcdefgh12345678abcd", "12345678", 8, 4));
assert(!libsimple_memelem("abcdefgh12345678abcdefgh12345678", "12345678", 8, 0));
assert(!strcmpnul(libsimple_memelem("abc123abc123", "123", 3, 4), "123abc123"));
assert(!libsimple_memelem("abc123abc123", "zzz", 3, 4));
assert(!libsimple_memelem("bc123abc123a", "123", 3, 4));
assert(!libsimple_memelem("abc123abc123", "123", 3, 0));
assert(!strcmpnul(libsimple_memelem("-a-aa--a", "a-", 2, 4), "a--a"));
assert(!strcmpnul(libsimple_memelem("--a--aa----a", "a--", 3, 4), "a----a"));
assert(!strcmpnul(libsimple_memelem("---a---aa------a", "a---", 4, 4), "a------a"));
assert(!strcmpnul(libsimple_memelem("-------a-------aa--------------a", "a-------", 8, 4), "a--------------a"));
return 0;
}
#endif
