xref: /freebsd/usr.bin/locate/locate/locate.h (revision 7aa383846770374466b1dcb2cefd71bde9acf463)
1 /*
2  * Copyright (c) 1995 Wolfram Schneider <wosch@FreeBSD.org>. Berlin.
3  * Copyright (c) 1989, 1993
4  *	The Regents of the University of California.  All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  * 3. All advertising materials mentioning features or use of this software
15  *    must display the following acknowledgement:
16  *	This product includes software developed by the University of
17  *	California, Berkeley and its contributors.
18  * 4. Neither the name of the University nor the names of its contributors
19  *    may be used to endorse or promote products derived from this software
20  *    without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32  * SUCH DAMAGE.
33  *
34  *	@(#)locate.h	8.1 (Berkeley) 6/6/93
35  * $FreeBSD$
36  */
37 
38 /* Symbolic constants shared by locate.c and code.c */
39 
40 #define	NBG		128		/* number of bigrams considered */
41 #define	OFFSET		14		/* abs value of max likely diff */
42 #define	PARITY		0200		/* parity bit */
43 #define	SWITCH		30		/* switch code */
44 #define UMLAUT          31              /* an 8 bit char followed */
45 
46 /* 	0-28	likeliest differential counts + offset to make nonnegative */
47 #define LDC_MIN         0
48 #define LDC_MAX        28
49 
50 /*	128-255 bigram codes (128 most common, as determined by 'updatedb') */
51 #define BIGRAM_MIN    (UCHAR_MAX - CHAR_MAX)
52 #define BIGRAM_MAX    UCHAR_MAX
53 
54 /*	32-127  single character (printable) ascii residue (ie, literal) */
55 #define ASCII_MIN      32
56 #define ASCII_MAX     CHAR_MAX
57 
58 /* #define TO7BIT(x)     (x = ( ((u_char)x) & CHAR_MAX )) */
59 #define TO7BIT(x)     (x = x & CHAR_MAX )
60 
61 
62 #if UCHAR_MAX >= 4096
63    define TOLOWER(ch)	  tolower(ch)
64 #else
65 
66 u_char myctype[UCHAR_MAX + 1];
67 #define TOLOWER(ch)	(myctype[ch])
68 #endif
69 
70 #define INTSIZE (sizeof(int))
71 
72 #define LOCATE_REG "*?[]\\"  /* fnmatch(3) meta characters */
73