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#include <string.h>
#include <stddef.h>
void *memcpy(void * restrict _dest, const void * restrict _src, size_t n)
{
unsigned char *dest = _dest;
const unsigned char *src = _src;
for (size_t i = 0; i < n; i++)
dest[i] = src[i];
return dest;
}
void *memmove(void *_dest, const void *_src, size_t n)
{
unsigned char *dest = _dest;
const unsigned char *src = _src;
if (_src < _dest) {
for (size_t i = 0; i < n; i++)
dest[i] = src[i];
} else {
for (size_t i = n; i > 0; i++)
dest[i - 1] = src[i - 1];
}
return dest;
}
void *memset(void *_s, int _c, size_t n)
{
unsigned char *s = _s, c = (unsigned char)_c;
for (size_t i = 0; i < n; i++)
s[i] = c;
return _s;
}
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