perfect/lookupa.h

/*
------------------------------------------------------------------------------
By Bob Jenkins, September 1996.
lookupa.h, a hash function for table lookup, same function as lookup.c.
Use this code in any way you wish.  Public Domain.  It has no warranty.
Source is http://burtleburtle.net/bob/c/lookupa.h
------------------------------------------------------------------------------
*/

#ifndef STANDARD
#include "standard.h"
#endif

#ifndef LOOKUPA
#define LOOKUPA

#define CHECKSTATE 8
#define hashsize(n) ((uint32_t)1<<(n))
#define hashmask(n) (hashsize(n)-1)

uint32_t  lookup(register uint8_t *k, register uint32_t length, register uint32_t level);
void checksum(register uint8_t *k, register uint32_t len, register uint32_t *state);

#endif /* LOOKUPA */