sal/textenc/unichars.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*************************************************************************
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * Copyright 2000, 2010 Oracle and/or its affiliates.
   7  *
   8  * OpenOffice.org - a multi-platform office productivity suite
   9  *
  10  * This file is part of OpenOffice.org.
  11  *
  12  * OpenOffice.org is free software: you can redistribute it and/or modify
  13  * it under the terms of the GNU Lesser General Public License version 3
  14  * only, as published by the Free Software Foundation.
  15  *
  16  * OpenOffice.org is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU Lesser General Public License version 3 for more details
  20  * (a copy is included in the LICENSE file that accompanied this code).
  21  *
  22  * You should have received a copy of the GNU Lesser General Public License
  23  * version 3 along with OpenOffice.org.  If not, see
  24  * <http://www.openoffice.org/license.html>
  25  * for a copy of the LGPLv3 License.
  26  *
  27  ************************************************************************/
  28
  29 #ifndef INCLUDED_SAL_TEXTENC_UNICHARS_HXX
  30 #define INCLUDED_SAL_TEXTENC_UNICHARS_HXX
  31
  32 #include "sal/config.h"
  33
  34 #include <cassert>
  35
  36 #include "sal/types.h"
  37
  38 #define RTL_TEXTENC_UNICODE_REPLACEMENT_CHARACTER 0xFFFD
  39
  40 inline bool ImplIsNoncharacter(sal_uInt32 nUtf32)
  41 {
  42     return (nUtf32 >= 0xFDD0 && nUtf32 <= 0xFDEF)
  43            || (nUtf32 & 0xFFFF) >= 0xFFFE
  44            || nUtf32 > 0x10FFFF;
  45 }
  46     // All code points that are noncharacters, as of Unicode 3.1.1.
  47
  48 bool ImplIsControlOrFormat(sal_uInt32 nUtf32);
  49
  50 inline bool ImplIsHighSurrogate(sal_uInt32 nUtf32)
  51 { return nUtf32 >= 0xD800 && nUtf32 <= 0xDBFF; }
  52     // All code points that are high-surrogates, as of Unicode 3.1.1.
  53
  54 inline bool ImplIsLowSurrogate(sal_uInt32 nUtf32)
  55 { return nUtf32 >= 0xDC00 && nUtf32 <= 0xDFFF; }
  56     // All code points that are low-surrogates, as of Unicode 3.1.1.
  57
  58 bool ImplIsPrivateUse(sal_uInt32 nUtf32);
  59
  60 bool ImplIsZeroWidth(sal_uInt32 nUtf32);
  61
  62 inline sal_uInt32 ImplGetHighSurrogate(sal_uInt32 nUtf32)
  63 {
  64     assert(nUtf32 >= 0x10000);
  65     return ((nUtf32 - 0x10000) >> 10) | 0xD800;
  66 }
  67
  68 inline sal_uInt32 ImplGetLowSurrogate(sal_uInt32 nUtf32)
  69 {
  70     assert(nUtf32 >= 0x10000);
  71     return ((nUtf32 - 0x10000) & 0x3FF) | 0xDC00;
  72 }
  73
  74 inline sal_uInt32 ImplCombineSurrogates(sal_uInt32 nHigh, sal_uInt32 nLow)
  75 {
  76     assert(ImplIsHighSurrogate(nHigh) && ImplIsLowSurrogate(nLow));
  77     return (((nHigh & 0x3FF) << 10) | (nLow & 0x3FF)) + 0x10000;
  78 }
  79
  80 #endif
  81
  82 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */