locate.h revision 330897 
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: stable/11/usr.bin/locate/locate/locate.h 330897 2018-03-14 03:19:51Z eadler $
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
68u_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