src/journal/lookup3.h

/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/

#pragma once

#include <inttypes.h>
#include <sys/types.h>

uint32_t jenkins_hashword(const uint32_t *k, size_t length, uint32_t initval);
void jenkins_hashword2(const uint32_t *k, size_t length, uint32_t *pc, uint32_t *pb);

uint32_t jenkins_hashlittle(const void *key, size_t length, uint32_t initval);
void jenkins_hashlittle2(const void *key, size_t length, uint32_t *pc, uint32_t *pb);

uint32_t jenkins_hashbig(const void *key, size_t length, uint32_t initval);

static inline uint64_t hash64(const void *data, size_t length) {
        uint32_t a = 0, b = 0;

        jenkins_hashlittle2(data, length, &a, &b);

        return ((uint64_t) a << 32ULL) | (uint64_t) b;
}