lookup3.c File Reference

#include <stdio.h>
#include <time.h>
#include <stdint.h>
#include <sys/param.h>

Include dependency graph for lookup3.c:

Go to the source code of this file.

Macros
#define	final(a, b, c)
#define	HASH_BIG_ENDIAN   0
#define	HASH_LITTLE_ENDIAN   0
#define	hashmask(n)   (hashsize(n)-1)
#define	hashsize(n)   ((uint32_t)1<<(n))
#define	mix(a, b, c)
#define	rot(x, k)   (((x)<<(k)) | ((x)>>(32-(k))))

Functions
uint32_t	hashbig (const void *key, size_t length, uint32_t initval)
uint32_t	hashlittle (const void *key, size_t length, uint32_t initval)
void	hashlittle2 (const void *key, size_t length, uint32_t *pc, uint32_t *pb)
uint32_t	hashword (const uint32_t *k, size_t length, uint32_t initval)
	lookup3.h
void	hashword2 (const uint32_t *k, size_t length, uint32_t *pc, uint32_t *pb)

Macro Definition Documentation

final

#define final	(		a,
			b,
			c
	)

Value:

{ \
  c ^= b; c -= rot(b,14); \
  a ^= c; a -= rot(c,11); \
  b ^= a; b -= rot(a,25); \
  c ^= b; c -= rot(b,16); \
  a ^= c; a -= rot(c,4);  \
  b ^= a; b -= rot(a,14); \
  c ^= b; c -= rot(b,24); \
}

Definition at line 149 of file lookup3.c.

HASH_BIG_ENDIAN

#define HASH_BIG_ENDIAN   0

Definition at line 63 of file lookup3.c.

HASH_LITTLE_ENDIAN

#define HASH_LITTLE_ENDIAN   0

Definition at line 62 of file lookup3.c.

hashmask

#define hashmask

(

n

)

(hashsize(n)-1)

Definition at line 67 of file lookup3.c.

hashsize

#define hashsize

(

n

)

((uint32_t)1<<(n))

Definition at line 66 of file lookup3.c.

mix

#define mix	(		a,
			b,
			c
	)

Value:

{ \
  a -= c;  a ^= rot(c, 4);  c += b; \
  b -= a;  b ^= rot(a, 6);  a += c; \
  c -= b;  c ^= rot(b, 8);  b += a; \
  a -= c;  a ^= rot(c,16);  c += b; \
  b -= a;  b ^= rot(a,19);  a += c; \
  c -= b;  c ^= rot(b, 4);  b += a; \
}

Definition at line 114 of file lookup3.c.

rot

#define rot	(		x,
			k
	)		(((x)<<(k)) | ((x)>>(32-(k))))

Definition at line 68 of file lookup3.c.

Function Documentation

hashbig()

uint32_t hashbig	(	const void *	key,
		size_t	length,
		uint32_t	initval
	)

Definition at line 807 of file lookup3.c.

References HASH_BIG_ENDIAN, and mix.

hashlittle()

uint32_t hashlittle	(	const void *	key,
		size_t	length,
		uint32_t	initval
	)

Definition at line 281 of file lookup3.c.

References HASH_LITTLE_ENDIAN, and mix.

hashlittle2()

void hashlittle2	(	const void *	key,
		size_t	length,
		uint32_t *	pc,
		uint32_t *	pb
	)

Definition at line 539 of file lookup3.c.

References HASH_LITTLE_ENDIAN, and mix.

hashword()

uint32_t hashword	(	const uint32_t *	k,
		size_t	length,
		uint32_t	initval
	)

lookup3.h

Minimal header file wrapping Bob Jenkins' lookup3.c

(c) 2019 Simon Brooke simon.nosp@m.@jou.nosp@m.rneym.nosp@m.an.c.nosp@m.c Public domain.

Definition at line 173 of file lookup3.c.

References mix.

hashword2()

void hashword2	(	const uint32_t *	k,
		size_t	length,
		uint32_t *	pc,
		uint32_t *	pb
	)

Definition at line 216 of file lookup3.c.

References mix.