usr.bin/tr/cset.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/cset.h 200462 2009-12-13 03:14:06Z delphij $
  27  */
  28
  29 #ifndef CSET_H
  30 #define CSET_H
  31
  32 #include <stdbool.h>
  33 #include <wchar.h>
  34 #include <wctype.h>
  35
  36 struct csnode {
  37         wchar_t         csn_min;
  38         wchar_t         csn_max;
  39         struct csnode   *csn_left;
  40         struct csnode   *csn_right;
  41 };
  42
  43 struct csclass {
  44         wctype_t        csc_type;
  45         bool            csc_invert;
  46         struct csclass  *csc_next;
  47 };
  48
  49 struct cset {
  50 #define CS_CACHE_SIZE   256
  51         bool            cs_cache[CS_CACHE_SIZE];
  52         bool            cs_havecache;
  53         struct csclass  *cs_classes;
  54         struct csnode   *cs_root;
  55         bool            cs_invert;
  56 };
  57
  58 bool                    cset_addclass(struct cset *, wctype_t, bool);
  59 struct cset *           cset_alloc(void);
  60 bool                    cset_add(struct cset *, wchar_t);
  61 void                    cset_invert(struct cset *);
  62 bool                    cset_in_hard(struct cset *, wchar_t);
  63 void                    cset_cache(struct cset *);
  64
  65 static __inline bool
  66 cset_in(struct cset *cs, wchar_t ch)
  67 {
  68
  69         if (ch < CS_CACHE_SIZE && cs->cs_havecache)
  70                 return (cs->cs_cache[ch]);
  71         return (cset_in_hard(cs, ch));
  72 }
  73
  74 #endif  /* CSET_H */