scc

 1#include <string.h>
 2
 3#undef memcpy
 4
 5void *
 6memcpy(void *restrict s1, const void *restrict s2, size_t n)
 7{
 8	char *d = s1;
 9	const char *s = s2;
10
11	while (n-- > 0)
12		*d++ = *s++;
13
14	return s1;
15}