#include <stddef.h>
#include <stdint.h>
#include <string.h>

#define HIGHS(x) ((x) - ((x)*0-1) / 255 * 128)
#define LOWS(x) (((x)*0-1) / 255)
#define has_zero(x) ((x) - LOWS(x) & ~(x) & HIGHS(x))

#undef strcmp
int strcmp(const char *l, const char *r)
{
	const size_t *wl;
	const size_t *wr;

	if ((uintptr_t)l % sizeof(size_t) != (uintptr_t)r % sizeof(size_t))
		goto bytewise;

	for (; (uintptr_t)l % sizeof(size_t); l++, r++) {
		if (*l != *r || !*l || !*r) {
			return *(unsigned char *)l
			       - *(unsigned char *)r;
		}
	}

	for (wl = (const size_t *)l, wr = (const size_t *)r
	     ; has_zero(*wl) || has_zero(*wr) && *wl == *wr
	     ; wl++, wr++);
	l = (const char *)wl;
	r = (const char *)wr;

bytewise:
	for(; *l == *r && *l && *r; l++, r++);

	return *(unsigned char *)l - *(unsigned char *)r;
}