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- /*
- * Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
- * 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 5.4 (Berkeley) 12/28/90
- */
-
- /* hash.h --
- *
- * This file contains definitions used by the hash module,
- * which maintains hash tables.
- */
-
- #ifndef _HASH
- #define _HASH
-
- /*
- * The following defines one entry in the hash table.
- */
-
- typedef struct Hash_Entry {
- struct Hash_Entry *next; /* Used to link together all the
- * entries associated with the same
- * bucket. */
- ClientData clientData; /* Arbitrary piece of 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;/* Pointers to Hash_Entry, one
- * for each bucket 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 {
- Hash_Table *tablePtr; /* Table being searched. */
- int nextIndex; /* Next bucket to check (after current). */
- Hash_Entry *hashEntryPtr; /* Next entry to check in current bucket. */
- } Hash_Search;
-
- /*
- * Macros.
- */
-
- /*
- * ClientData Hash_GetValue(h)
- * Hash_Entry *h;
- */
-
- #define Hash_GetValue(h) ((h)->clientData)
-
- /*
- * Hash_SetValue(h, val);
- * Hash_Entry *h;
- * char *val;
- */
-
- #define Hash_SetValue(h, val) ((h)->clientData = (ClientData) (val))
-
- /*
- * Hash_Size(n) returns the number of words in an object of n bytes
- */
-
- #define Hash_Size(n) (((n) + sizeof (int) - 1) / sizeof (int))
-
- /*
- * The following procedure declarations and macros
- * are the only things that should be needed outside
- * the implementation code.
- */
-
- extern Hash_Entry * Hash_CreateEntry();
- extern void Hash_DeleteTable();
- extern void Hash_DeleteEntry();
- extern void Hash_DeleteTable();
- extern Hash_Entry * Hash_EnumFirst();
- extern Hash_Entry * Hash_EnumNext();
- extern Hash_Entry * Hash_FindEntry();
- extern void Hash_InitTable();
- extern void Hash_PrintStats();
-
- #endif _HASH
-