usr.bin/locate/locate/locate.h

   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: src/usr.bin/locate/locate/locate.h,v 1.7 1999/08/28 01:02:59 peter Exp $
  36  * $DragonFly: src/usr.bin/locate/locate/locate.h,v 1.2 2003/06/17 04:29:28 dillon Exp $
  37  */
  38
  39 /* Symbolic constants shared by locate.c and code.c */
  40
  41 #define NBG             128             /* number of bigrams considered */
  42 #define OFFSET          14              /* abs value of max likely diff */
  43 #define PARITY          0200            /* parity bit */
  44 #define SWITCH          30              /* switch code */
  45 #define UMLAUT          31              /* an 8 bit char followed */
  46
  47 /*      0-28    likeliest differential counts + offset to make nonnegative */
  48 #define LDC_MIN         0
  49 #define LDC_MAX        28
  50
  51 /*      128-255 bigram codes (128 most common, as determined by 'updatedb') */
  52 #define BIGRAM_MIN    (UCHAR_MAX - CHAR_MAX)
  53 #define BIGRAM_MAX    UCHAR_MAX
  54
  55 /*      32-127  single character (printable) ascii residue (ie, literal) */
  56 #define ASCII_MIN      32
  57 #define ASCII_MAX     CHAR_MAX
  58
  59 /* #define TO7BIT(x)     (x = ( ((u_char)x) & CHAR_MAX )) */
  60 #define TO7BIT(x)     (x = x & CHAR_MAX )
  61
  62
  63 #if UCHAR_MAX >= 4096
  64    define TOLOWER(ch)     tolower(ch)
  65 #else
  66
  67 u_char myctype[UCHAR_MAX + 1];
  68 #define TOLOWER(ch)     (myctype[ch])
  69 #endif
  70
  71 #define INTSIZE (sizeof(int))
  72
  73 #define LOCATE_REG "*?[]\\"  /* fnmatch(3) meta characters */