/*-
* Copyright (c) 1988, 1989, 1990, 1993
* The Regents of the University of California. All rights reserved.
* Copyright (c) 1988, 1989 by Adam de Boor
* Copyright (c) 1989 by Berkeley Softworks
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Adam de Boor.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)hash.h 8.1 (Berkeley) 6/6/93
* $FreeBSD$
*/
#ifndef hash_h_f6312f46
#define hash_h_f6312f46
/* hash.h --
*
* This file contains definitions used by the hash module,
* which maintains hash tables.
*/
#include "util.h"
/*
* The following defines one entry in the hash table.
*/
typedef struct Hash_Entry {
struct Hash_Entry *next; /* Link entries within same bucket. */
void *clientData; /* Data associated with key. */
unsigned namehash; /* hash value of key */
char name[1]; /* key string */
} Hash_Entry;
typedef struct Hash_Table {
struct Hash_Entry **bucketPtr; /* Buckets in the table */
int size; /* Actual size of array. */
int numEntries; /* Number of entries in the table. */
int mask; /* Used to select bits for hashing. */
} Hash_Table;
/*
* The following structure is used by the searching routines
* to record where we are in the search.
*/
typedef struct Hash_Search {
const Hash_Table *tablePtr; /* Table being searched. */
int nextIndex; /* Next bucket to check */
Hash_Entry *hashEntryPtr; /* Next entry in current bucket */
} Hash_Search;
/*
* Macros.
*/
/*
* void *Hash_GetValue(const Hash_Entry *h)
*/
#define Hash_GetValue(h) ((h)->clientData)
/*
* Hash_SetValue(Hash_Entry *h, void *val);
*/
#define Hash_SetValue(h, val) ((h)->clientData = (val))
void Hash_InitTable(Hash_Table *, int);
void Hash_DeleteTable(Hash_Table *);
Hash_Entry *Hash_FindEntry(const Hash_Table *, const char *);
Hash_Entry *Hash_CreateEntry(Hash_Table *, const char *, Boolean *);
void Hash_DeleteEntry(Hash_Table *, Hash_Entry *);
Hash_Entry *Hash_EnumFirst(const Hash_Table *, Hash_Search *);
Hash_Entry *Hash_EnumNext(Hash_Search *);
#endif /* hash_h_f6312f46 */
