[thirdparty/systemd.git] / src / journal / lookup3.h

#pragma once

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

#include "macro.h"

uint32_t jenkins_hashword(const uint32_t *k, size_t length, uint32_t initval) _pure_;
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) _pure_;
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) _pure_;

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;
}
Commit	Line	Data
c2f1db8f	1	#pragma once
87d2c1ff LP	2
	3	#include <inttypes.h>
	4	#include <sys/types.h>
	5
44a6b1b6 ZJS	6	#include "macro.h"
	7
	8	uint32_t jenkins_hashword(const uint32_t *k, size_t length, uint32_t initval) _pure_;
87d2c1ff LP	9	void jenkins_hashword2(const uint32_t k, size_t length, uint32_t pc, uint32_t *pb);
87d2c1ff LP	10
44a6b1b6	11	uint32_t jenkins_hashlittle(const void *key, size_t length, uint32_t initval) _pure_;
87d2c1ff LP	12	void jenkins_hashlittle2(const void key, size_t length, uint32_t pc, uint32_t *pb);
87d2c1ff LP	13
44a6b1b6	14	uint32_t jenkins_hashbig(const void *key, size_t length, uint32_t initval) _pure_;
87d2c1ff LP	15
	16	static inline uint64_t hash64(const void *data, size_t length) {
	17	uint32_t a = 0, b = 0;
	18
	19	jenkins_hashlittle2(data, length, &a, &b);
	20
	21	return ((uint64_t) a << 32ULL) \| (uint64_t) b;
	22	}