runtime/lookupa.h

   1 /*
   2 ------------------------------------------------------------------------------
   3 By Bob Jenkins, September 1996.
   4 lookupa.h, a hash function for table lookup, same function as lookup.c.
   5 Use this code in any way you wish.  Public Domain.  It has no warranty.
   6 Source is http://burtleburtle.net/bob/c/lookupa.h
   7 ------------------------------------------------------------------------------
   8 */
   9
  10 #ifndef STANDARD
  11 #include "standard.h"
  12 #endif
  13
  14 #ifndef LOOKUPA
  15 #define LOOKUPA
  16
  17 #define CHECKSTATE 8
  18 #define hashsize(n) ((ub4)1<<(n))
  19 #define hashmask(n) (hashsize(n)-1)
  20
  21 ub4  lookup(/*_ ub1 *k, ub4 length, ub4 level _*/);
  22 void checksum(/*_ ub1 *k, ub4 length, ub4 *state _*/);
  23
  24 #endif /* LOOKUPA */