ap-hash-macro.h

#define AP_HASH(h, s, l) \
	do { \
		h = 0xAAAAAAAAu; \
		unsigned int i = 0u; \
		while (i < l) { \
			if ((i & 1u) == 0u) { \
				h ^= (h << 7) ^ (((unsigned char) s[0]) * (h >> 3)); \
			} else { \
				h ^= ~((h << 11) + (((unsigned char) s[0]) ^ (h >> 5))); \
			} \
			s++; \
			i++; \
		} \
	} while (0)

#if 0

// -------
//  Usage
// -------

#include <stdio.h>

int
main(void) {
	unsigned int hash;
	const char *str = "jonathan";
	AP_HASH(hash, str, 8);
	printf("Hash: %u.\n", hash);
	return 0;
}

#endif