include/hash.h

   1 /*
   2  * Copyright (C) 2004 Jesus Gimenez, Lluis Marquez and Senen Moya
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 #ifndef SVMT_HASH_H
  20
  21 #include <stdint.h>
  22
  23 #ifdef __cplusplus
  24 extern "C"
  25 {
  26 #endif
  27
  28 typedef struct hash_t
  29 {
  30         struct hash_node_t **bucket;   /* array of hash nodes */
  31         int size;                      /* size of the array */
  32         int entries;                   /* number of entries in table */
  33         int downshift;                 /* shift cound, used in hash function */
  34         int mask;                      /* used to select bits for hashing */
  35 } hash_t;
  36
  37 typedef struct hash_node_t
  38 {
  39         uintptr_t data;                /* data in hash node */
  40         const char * key;              /* key for hash lookup */
  41         struct hash_node_t *next;      /* next node in hash chain */
  42 } hash_node_t;
  43
  44 #define HASH_FAIL -1
  45
  46 void hash_init(hash_t *, int);
  47 uintptr_t hash_lookup (const hash_t *, const char *);
  48 uintptr_t hash_insert (hash_t *, const char *, uintptr_t);
  49 uintptr_t hash_delete (hash_t *, const char *);
  50 void hash_destroy(hash_t *);
  51 char *hash_stats (hash_t *);
  52 void hash_print(hash_t *,FILE *f);
  53 void rebuild_table(hash_t *);
  54
  55 #ifdef __cplusplus
  56 }
  57 #endif
  58
  59 #define SVMT_HASH_H
  60 #endif