* Copyright 2025, Haiku, Inc. All rights reserved.
* Copyright 2008, Axel Dörfler, axeld@pinc-software.de.
* Distributed under the terms of the MIT license.
*/
#include <stdint.h>
#include <string.h>
#define MISALIGNMENT(PTR, TYPE) ((addr_t)(PTR) & (sizeof(TYPE) - 1))
int
memcmp(const void *_a, const void *_b, size_t count)
{
const unsigned char *a = (const unsigned char *)_a;
const unsigned char *b = (const unsigned char *)_b;
if (MISALIGNMENT(a, size_t) == 0 && MISALIGNMENT(b, size_t) == 0) {
size_t *asz = (size_t *)a;
size_t *bsz = (size_t *)b;
while (count >= sizeof(size_t) && *asz == *bsz) {
asz++;
bsz++;
count -= sizeof(size_t);
}
a = (const unsigned char *)asz;
b = (const unsigned char *)bsz;
}
while (count > 0 && *a == *b) {
a++;
b++;
count--;
}
if (count == 0)
return 0;
return *a - *b;
}
