xref: /illumos-gate/usr/src/cmd/spell/hash.h (revision 92e807e650499591f2549dc94c6d20b81e94e394)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
23 /*	  All Rights Reserved  	*/
24 
25 
26 #ident	"%Z%%M%	%I%	%E% SMI"	/* SVr4.0 1.2	*/
27 #define	HASHWIDTH 27
28 #define	HASHSIZE 134217689L	/* prime under 2^HASHWIDTH */
29 #define	INDEXWIDTH 9
30 #define	INDEXSIZE (1<<INDEXWIDTH)
31 #define	NI (INDEXSIZE+1)
32 #define	ND ((25750/2) * sizeof (*table))
33 #define	BYTE 8
34 
35 extern unsigned *table;
36 extern int index[];	/* into dif table based on hi hash bits */
37 
38 void	hashinit(void);
39 int	hashlook(char *);
40 unsigned long	hash(char *);
41