cwchash/hashtable_private.h

   1 /* Copyright (C) 2002, 2004 Christopher Clark <firstname.lastname@cl.cam.ac.uk> */
   2
   3 #ifndef __HASHTABLE_PRIVATE_CWC22_H__
   4 #define __HASHTABLE_PRIVATE_CWC22_H__
   5
   6 #include "hashtable.h"
   7
   8 /*****************************************************************************/
   9 struct entry
  10 {
  11     void *k, *v;
  12     unsigned int h;
  13     struct entry *next;
  14 };
  15
  16 struct hashtable {
  17     unsigned int tablelength;
  18     struct entry **table;
  19     unsigned int entrycount;
  20     unsigned int loadlimit;
  21     unsigned int primeindex;
  22     unsigned int (*hashfn) (void *k);
  23     int (*eqfn) (void *k1, void *k2);
  24 };
  25
  26 /*****************************************************************************/
  27 unsigned int
  28 hash(struct hashtable *h, void *k);
  29
  30 /*****************************************************************************/
  31 /* indexFor */
  32 static inline unsigned int
  33 indexFor(unsigned int tablelength, unsigned int hashvalue) {
  34     return (hashvalue % tablelength);
  35 };
  36
  37 /* Only works if tablelength == 2^N */
  38 /*static inline unsigned int
  39 indexFor(unsigned int tablelength, unsigned int hashvalue)
  40 {
  41     return (hashvalue & (tablelength - 1u));
  42 }
  43 */
  44
  45 /*****************************************************************************/
  46 #define freekey(X) free(X)
  47 /*define freekey(X) ; */
  48
  49
  50 /*****************************************************************************/
  51
  52 #endif /* __HASHTABLE_PRIVATE_CWC22_H__*/
  53
  54 /*
  55  * Copyright (c) 2002, Christopher Clark
  56  * All rights reserved.
  57  *
  58  * Redistribution and use in source and binary forms, with or without
  59  * modification, are permitted provided that the following conditions
  60  * are met:
  61  *
  62  * * Redistributions of source code must retain the above copyright
  63  * notice, this list of conditions and the following disclaimer.
  64  *
  65  * * Redistributions in binary form must reproduce the above copyright
  66  * notice, this list of conditions and the following disclaimer in the
  67  * documentation and/or other materials provided with the distribution.
  68  *
  69  * * Neither the name of the original author; nor the names of any contributors
  70  * may be used to endorse or promote products derived from this software
  71  * without specific prior written permission.
  72  *
  73  *
  74  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  75  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  76  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  77  * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER
  78  * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  79  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  80  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  81  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  82  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  83  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  84  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  85 */