sal/textenc/unichars.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #ifndef INCLUDED_SAL_TEXTENC_UNICHARS_HXX
  21 #define INCLUDED_SAL_TEXTENC_UNICHARS_HXX
  22
  23 #include <sal/config.h>
  24
  25 #include <cassert>
  26
  27 #include <rtl/character.hxx>
  28 #include <sal/types.h>
  29
  30 #define RTL_TEXTENC_UNICODE_REPLACEMENT_CHARACTER 0xFFFD
  31
  32 bool ImplIsControlOrFormat(sal_uInt32 nUtf32);
  33
  34 inline bool ImplIsHighSurrogate(sal_uInt32 nUtf32)
  35 { return nUtf32 >= 0xD800 && nUtf32 <= 0xDBFF; }
  36     // All code points that are high-surrogates, as of Unicode 3.1.1.
  37
  38 inline bool ImplIsLowSurrogate(sal_uInt32 nUtf32)
  39 { return nUtf32 >= 0xDC00 && nUtf32 <= 0xDFFF; }
  40     // All code points that are low-surrogates, as of Unicode 3.1.1.
  41
  42 bool ImplIsPrivateUse(sal_uInt32 nUtf32);
  43
  44 bool ImplIsZeroWidth(sal_uInt32 nUtf32);
  45
  46 inline sal_uInt32 ImplGetHighSurrogate(sal_uInt32 nUtf32)
  47 {
  48     assert(nUtf32 >= 0x10000);
  49     return ((nUtf32 - 0x10000) >> 10) | 0xD800;
  50 }
  51
  52 inline sal_uInt32 ImplGetLowSurrogate(sal_uInt32 nUtf32)
  53 {
  54     assert(nUtf32 >= 0x10000);
  55     return ((nUtf32 - 0x10000) & 0x3FF) | 0xDC00;
  56 }
  57
  58 inline sal_uInt32 ImplCombineSurrogates(sal_uInt32 nHigh, sal_uInt32 nLow)
  59 {
  60     assert(ImplIsHighSurrogate(nHigh) && ImplIsLowSurrogate(nLow));
  61     return (((nHigh & 0x3FF) << 10) | (nLow & 0x3FF)) + 0x10000;
  62 }
  63
  64 #endif
  65
  66 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */