lib/libc/locale/nextwctype.c

   1 /*-
   2  * Copyright (c) 2004 Tim J. Robbins.
   3  * All rights reserved.
   4  *
   5  * Copyright (c) 2011 The FreeBSD Foundation
   6  * All rights reserved.
   7  * Portions of this software were developed by David Chisnall
   8  * under sponsorship from the FreeBSD Foundation.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  * $FreeBSD: head/lib/libc/locale/nextwctype.c 227753 2011-11-20 14:45:42Z theraven $
  32  */
  33
  34
  35 #include <runetype.h>
  36 #include <wchar.h>
  37 #include <wctype.h>
  38 #include "mblocal.h"
  39
  40 wint_t
  41 nextwctype_l(wint_t wc, wctype_t wct, locale_t locale)
  42 {
  43         size_t lim;
  44         FIX_LOCALE(locale);
  45         _RuneLocale *runes = XLOCALE_CTYPE(locale)->runes;
  46         _RuneRange *rr = &runes->__runetype_ext;
  47         _RuneEntry *base, *re;
  48         int noinc;
  49
  50         noinc = 0;
  51         if (wc < _CACHED_RUNES) {
  52                 wc++;
  53                 while (wc < _CACHED_RUNES) {
  54                         if (runes->__runetype[wc] & wct)
  55                                 return (wc);
  56                         wc++;
  57                 }
  58                 wc--;
  59         }
  60         if (rr->__ranges != NULL && wc < rr->__ranges[0].__min) {
  61                 wc = rr->__ranges[0].__min;
  62                 noinc = 1;
  63         }
  64
  65         /* Binary search -- see bsearch.c for explanation. */
  66         base = rr->__ranges;
  67         for (lim = rr->__nranges; lim != 0; lim >>= 1) {
  68                 re = base + (lim >> 1);
  69                 if (re->__min <= wc && wc <= re->__max)
  70                         goto found;
  71                 else if (wc > re->__max) {
  72                         base = re + 1;
  73                         lim--;
  74                 }
  75         }
  76         return (-1);
  77 found:
  78         if (!noinc)
  79                 wc++;
  80         if (re->__min <= wc && wc <= re->__max) {
  81                 if (re->__types != NULL) {
  82                         for (; wc <= re->__max; wc++)
  83                                 if (re->__types[wc - re->__min] & wct)
  84                                         return (wc);
  85                 } else if (re->__map & wct)
  86                         return (wc);
  87         }
  88         while (++re < rr->__ranges + rr->__nranges) {
  89                 wc = re->__min;
  90                 if (re->__types != NULL) {
  91                         for (; wc <= re->__max; wc++)
  92                                 if (re->__types[wc - re->__min] & wct)
  93                                         return (wc);
  94                 } else if (re->__map & wct)
  95                         return (wc);
  96         }
  97         return (-1);
  98 }
  99 wint_t
 100 nextwctype(wint_t wc, wctype_t wct)
 101 {
 102         return nextwctype_l(wc, wct, __get_locale());
 103 }