rx/rxhash.h

   1 /* classes: h_files */
   2
   3 #ifndef RXHASHH
   4 #define RXHASHH
   5 /*      Copyright (C) 1995, 1996 Tom Lord
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU Library General Public License as published by
   9  * the Free Software Foundation; either version 2, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Library General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Library General Public License
  18  * along with this software; see the file COPYING.  If not, write to
  19  * the Free Software Foundation, 59 Temple Place - Suite 330,
  20  * Boston, MA 02111-1307, USA.
  21  */
  22
  23
  24 \f
  25 /*
  26  * Tom Lord (lord@cygnus.com, lord@gnu.ai.mit.edu)
  27  */
  28 \f
  29
  30 #include "rxbitset.h"
  31
  32 /* giant inflatable hash trees */
  33
  34 struct rx_hash_item
  35 {
  36   struct rx_hash_item * next_same_hash;
  37   struct rx_hash * table;
  38   unsigned long hash;
  39   void * data;
  40   void * binding;
  41 };
  42
  43 struct rx_hash
  44 {
  45   struct rx_hash * parent;
  46   int refs;
  47   RX_subset nested_p;
  48   void ** children[16];
  49 };
  50
  51 struct rx_hash_rules;
  52
  53 /* rx_hash_eq should work like the == operator. */
  54
  55 #ifdef __STDC__
  56 typedef int (*rx_hash_eq)(void *, void *);
  57 typedef struct rx_hash * (*rx_alloc_hash)(struct rx_hash_rules *);
  58 typedef void (*rx_free_hash)(struct rx_hash *,
  59                             struct rx_hash_rules *);
  60 typedef struct rx_hash_item * (*rx_alloc_hash_item)(struct rx_hash_rules *,
  61                                                     void *);
  62 typedef void (*rx_free_hash_item)(struct rx_hash_item *,
  63                                  struct rx_hash_rules *);
  64 typedef void (*rx_hash_freefn) (struct rx_hash_item * it);
  65 #else
  66 typedef int (*rx_hash_eq)();
  67 typedef struct rx_hash * (*rx_alloc_hash)();
  68 typedef void (*rx_free_hash)();
  69 typedef struct rx_hash_item * (*rx_alloc_hash_item)();
  70 typedef void (*rx_free_hash_item)();
  71 typedef void (*rx_hash_freefn) ();
  72 #endif
  73
  74 struct rx_hash_rules
  75 {
  76   rx_hash_eq eq;
  77   rx_alloc_hash hash_alloc;
  78   rx_free_hash free_hash;
  79   rx_alloc_hash_item hash_item_alloc;
  80   rx_free_hash_item free_hash_item;
  81 };
  82
  83 \f
  84 #ifdef __STDC__
  85 extern struct rx_hash_item * rx_hash_find (struct rx_hash * table,
  86                                                    unsigned long hash,
  87                                                    void * value,
  88                                                    struct rx_hash_rules * rules);
  89 extern struct rx_hash_item * rx_hash_store (struct rx_hash * table,
  90                                                     unsigned long hash,
  91                                                     void * value,
  92                                                     struct rx_hash_rules * rules);
  93 extern void rx_hash_free (struct rx_hash_item * it, struct rx_hash_rules * rules);
  94 extern void rx_free_hash_table (struct rx_hash * tab, rx_hash_freefn freefn,
  95                                         struct rx_hash_rules * rules);
  96 extern int rx_count_hash_nodes (struct rx_hash * st);
  97
  98 #else /* STDC */
  99 extern struct rx_hash_item * rx_hash_find ();
 100 extern struct rx_hash_item * rx_hash_store ();
 101 extern void rx_hash_free ();
 102 extern void rx_free_hash_table ();
 103 extern int rx_count_hash_nodes ();
 104
 105 #endif /* STDC */
 106
 107
 108
 109
 110
 111 #endif  /* RXHASHH */
 112