usr.bin/tr/cmap.h

   1 /*-
   2  * Copyright (c) 2004 Tim J. Robbins.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  * $FreeBSD: head/usr.bin/tr/cmap.h 200462 2009-12-13 03:14:06Z delphij $
  27  */
  28
  29 #ifndef CMAP_H
  30 #define CMAP_H
  31
  32 #include <limits.h>
  33 #include <stdbool.h>
  34 #include <wchar.h>
  35
  36 struct cmapnode {
  37         wint_t          cmn_from;
  38         wint_t          cmn_to;
  39         struct cmapnode *cmn_left;
  40         struct cmapnode *cmn_right;
  41 };
  42
  43 struct cmap {
  44 #define CM_CACHE_SIZE   128
  45         wint_t          cm_cache[CM_CACHE_SIZE];
  46         bool            cm_havecache;
  47         struct cmapnode *cm_root;
  48 #define CM_DEF_SELF     -2
  49         wint_t          cm_def;
  50         wint_t          cm_min;
  51         wint_t          cm_max;
  52 };
  53
  54 struct cmap *   cmap_alloc(void);
  55 bool            cmap_add(struct cmap *, wint_t, wint_t);
  56 wint_t          cmap_lookup_hard(struct cmap *, wint_t);
  57 void            cmap_cache(struct cmap *);
  58 wint_t          cmap_default(struct cmap *, wint_t);
  59
  60 static __inline wint_t
  61 cmap_lookup(struct cmap *cm, wint_t from)
  62 {
  63
  64         if (from < CM_CACHE_SIZE && cm->cm_havecache)
  65                 return (cm->cm_cache[from]);
  66         return (cmap_lookup_hard(cm, from));
  67 }
  68
  69 static __inline wint_t
  70 cmap_min(struct cmap *cm)
  71 {
  72
  73         return (cm->cm_min);
  74 }
  75
  76 static __inline wint_t
  77 cmap_max(struct cmap *cm)
  78 {
  79
  80         return (cm->cm_max);
  81 }
  82
  83 #endif