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#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#include <limits.h>
#define SS (sizeof(size_t))
#define ALIGN (sizeof(size_t)-1)
#define ONES ((size_t)-1/UCHAR_MAX)
void *memset(void *dest, int c, size_t n)
{
unsigned char *s = dest;
c = (unsigned char)c;
for (; ((uintptr_t)s & ALIGN) && n; n--) *s++ = c;
if (n) {
size_t *w, k = ONES * c;
for (w = (void *)s; n>=SS; n-=SS, w++) *w = k;
for (s = (void *)w; n; n--, s++) *s = c;
}
return dest;
}
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