ref: e0e4c5ac12c26af807a1a19d04cab53e8fae148e
dir: /src/libc/string/memcpy.c/
#include <string.h>
#undef memcpy
void *
memcpy(void * restrict dst, const void * restrict src, size_t n)
{
	char *s1 = dst;
	const char *s2 = src;
	while (n-- > 0)
		*s1++ = *s2++;
	return dst;
}