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/* $Id$ */
/* classes: h_files */
#ifndef RXHASHH
#define RXHASHH
/* Copyright (C) 1995, 1996 Tom Lord
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this software; see the file COPYING. If not, write to
* the Free Software Foundation, 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Tom Lord (lord@cygnus.com, lord@gnu.ai.mit.edu)
*/
#include "rxbitset.h"
/* giant inflatable hash trees */
struct rx_hash_item
{
struct rx_hash_item * next_same_hash;
struct rx_hash * table;
unsigned long hash;
void * data;
void * binding;
};
struct rx_hash
{
struct rx_hash * parent;
int refs;
RX_subset nested_p;
void ** children[16];
};
struct rx_hash_rules;
/* rx_hash_eq should work like the == operator. */
#ifdef __STDC__
typedef int (*rx_hash_eq)(void *, void *);
typedef struct rx_hash * (*rx_alloc_hash)(struct rx_hash_rules *);
typedef void (*rx_free_hash)(struct rx_hash *,
struct rx_hash_rules *);
typedef struct rx_hash_item * (*rx_alloc_hash_item)(struct rx_hash_rules *,
void *);
typedef void (*rx_free_hash_item)(struct rx_hash_item *,
struct rx_hash_rules *);
typedef void (*rx_hash_freefn) (struct rx_hash_item * it);
#else
typedef int (*rx_hash_eq)();
typedef struct rx_hash * (*rx_alloc_hash)();
typedef void (*rx_free_hash)();
typedef struct rx_hash_item * (*rx_alloc_hash_item)();
typedef void (*rx_free_hash_item)();
typedef void (*rx_hash_freefn) ();
#endif
struct rx_hash_rules
{
rx_hash_eq eq;
rx_alloc_hash hash_alloc;
rx_free_hash free_hash;
rx_alloc_hash_item hash_item_alloc;
rx_free_hash_item free_hash_item;
};
#ifdef __STDC__
extern struct rx_hash_item * rx_hash_find (struct rx_hash * table,
unsigned long hash,
void * value,
struct rx_hash_rules * rules);
extern struct rx_hash_item * rx_hash_store (struct rx_hash * table,
unsigned long hash,
void * value,
struct rx_hash_rules * rules);
extern void rx_hash_free (struct rx_hash_item * it, struct rx_hash_rules * rules);
extern void rx_free_hash_table (struct rx_hash * tab, rx_hash_freefn freefn,
struct rx_hash_rules * rules);
extern int rx_count_hash_nodes (struct rx_hash * st);
#else /* STDC */
extern struct rx_hash_item * rx_hash_find ();
extern struct rx_hash_item * rx_hash_store ();
extern void rx_hash_free ();
extern void rx_free_hash_table ();
extern int rx_count_hash_nodes ();
#endif /* STDC */
#endif /* RXHASHH */
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