wtf/unicode/glib/UnicodeMacrosFromICU.h

   1 /*
   2  *  Copyright (C) 2006 George Staikos <staikos@kde.org>
   3  *  Copyright (C) 2006 Alexey Proskuryakov <ap@nypop.com>
   4  *  Copyright (C) 2007 Apple Computer, Inc. All rights reserved.
   5  *  Copyright (C) 2008 Jürg Billeter <j@bitron.ch>
   6  *  Copyright (C) 2008 Dominik Röttsches <dominik.roettsches@access-company.com>
   7  *
   8  *  This library is free software; you can redistribute it and/or
   9  *  modify it under the terms of the GNU Library General Public
  10  *  License as published by the Free Software Foundation; either
  11  *  version 2 of the License, or (at your option) any later version.
  12  *
  13  *  This library is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  *  Library General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU Library General Public License
  19  *  along with this library; see the file COPYING.LIB.  If not, write to
  20  *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  21  *  Boston, MA 02110-1301, USA.
  22  *
  23  */
  24
  25 #ifndef UnicodeMacrosFromICU_h
  26 #define UnicodeMacrosFromICU_h
  27
  28 // some defines from ICU
  29
  30 #define U16_IS_LEAD(c) (((c)&0xfffffc00)==0xd800)
  31 #define U16_IS_TRAIL(c) (((c)&0xfffffc00)==0xdc00)
  32 #define U16_SURROGATE_OFFSET ((0xd800<<10UL)+0xdc00-0x10000)
  33 #define U16_GET_SUPPLEMENTARY(lead, trail) \
  34     (((UChar32)(lead)<<10UL)+(UChar32)(trail)-U16_SURROGATE_OFFSET)
  35
  36 #define U16_LEAD(supplementary) (UChar)(((supplementary)>>10)+0xd7c0)
  37 #define U16_TRAIL(supplementary) (UChar)(((supplementary)&0x3ff)|0xdc00)
  38
  39 #define U_IS_SURROGATE(c) (((c)&0xfffff800)==0xd800)
  40 #define U16_IS_SINGLE(c) !U_IS_SURROGATE(c)
  41 #define U16_IS_SURROGATE(c) U_IS_SURROGATE(c)
  42 #define U16_IS_SURROGATE_LEAD(c) (((c)&0x400)==0)
  43
  44 #define U16_PREV(s, start, i, c) { \
  45     (c)=(s)[--(i)]; \
  46     if(U16_IS_TRAIL(c)) { \
  47         uint16_t __c2; \
  48         if((i)>(start) && U16_IS_LEAD(__c2=(s)[(i)-1])) { \
  49             --(i); \
  50             (c)=U16_GET_SUPPLEMENTARY(__c2, (c)); \
  51         } \
  52     } \
  53 }
  54
  55 #define U16_NEXT(s, i, length, c) { \
  56     (c)=(s)[(i)++]; \
  57     if(U16_IS_LEAD(c)) { \
  58         uint16_t __c2; \
  59         if((i)<(length) && U16_IS_TRAIL(__c2=(s)[(i)])) { \
  60             ++(i); \
  61             (c)=U16_GET_SUPPLEMENTARY((c), __c2); \
  62         } \
  63     } \
  64 }
  65
  66 #define U_MASK(x) ((uint32_t)1<<(x))
  67
  68 #endif
  69