xref: /freebsd/usr.bin/locate/locate/locate.h (revision a0409676120c1e558d0ade943019934e0f15118d)
1 /*
2  * SPDX-License-Identifier: BSD-4-Clause
3  *
4  * Copyright (c) 1995 Wolfram Schneider <wosch@FreeBSD.org>. Berlin.
5  * Copyright (c) 1989, 1993
6  *	The Regents of the University of California.  All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  * 3. All advertising materials mentioning features or use of this software
17  *    must display the following acknowledgement:
18  *	This product includes software developed by the University of
19  *	California, Berkeley and its contributors.
20  * 4. Neither the name of the University nor the names of its contributors
21  *    may be used to endorse or promote products derived from this software
22  *    without specific prior written permission.
23  *
24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34  * SUCH DAMAGE.
35  *
36  *	@(#)locate.h	8.1 (Berkeley) 6/6/93
37  * $FreeBSD$
38  */
39 
40 /* Symbolic constants shared by locate.c and code.c */
41 
42 #define	NBG		128		/* number of bigrams considered */
43 #define	OFFSET		14		/* abs value of max likely diff */
44 #define	PARITY		0200		/* parity bit */
45 #define	SWITCH		30		/* switch code */
46 #define UMLAUT          31              /* an 8 bit char followed */
47 
48 /* 	0-28	likeliest differential counts + offset to make nonnegative */
49 #define LDC_MIN         0
50 #define LDC_MAX        28
51 
52 /*	128-255 bigram codes (128 most common, as determined by 'updatedb') */
53 #define BIGRAM_MIN    (UCHAR_MAX - SCHAR_MAX)
54 #define BIGRAM_MAX    UCHAR_MAX
55 
56 /*	32-127  single character (printable) ascii residue (ie, literal) */
57 #define ASCII_MIN      32
58 #define ASCII_MAX     SCHAR_MAX
59 
60 /* #define TO7BIT(x)     (x = ( ((u_char)x) & SCHAR_MAX )) */
61 #define TO7BIT(x)     (x = x & SCHAR_MAX )
62 
63 
64 #if UCHAR_MAX >= 4096
65    define TOLOWER(ch)	  tolower(ch)
66 #else
67 
68 extern u_char myctype[UCHAR_MAX + 1];
69 #define TOLOWER(ch)	(myctype[ch])
70 #endif
71 
72 #define INTSIZE (sizeof(int))
73 
74 #define LOCATE_REG "*?[]\\"  /* fnmatch(3) meta characters */
75