sal/textenc/unichars.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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   9  * This file incorporates work covered by the following license notice:
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  15  *   License, Version 2.0 (the "License"); you may not use this file
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  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 // All code points that are high-surrogates, as of Unicode 3.1.1.
  35 inline bool ImplIsHighSurrogate(sal_uInt32 nUtf32) { return nUtf32 >= 0xD800 && nUtf32 <= 0xDBFF; }
  36
  37 // All code points that are low-surrogates, as of Unicode 3.1.1.
  38 inline bool ImplIsLowSurrogate(sal_uInt32 nUtf32) { return nUtf32 >= 0xDC00 && nUtf32 <= 0xDFFF; }
  39
  40 bool ImplIsPrivateUse(sal_uInt32 nUtf32);
  41
  42 bool ImplIsZeroWidth(sal_uInt32 nUtf32);
  43
  44 inline sal_uInt32 ImplGetHighSurrogate(sal_uInt32 nUtf32)
  45 {
  46     assert(nUtf32 >= 0x10000);
  47     return ((nUtf32 - 0x10000) >> 10) | 0xD800;
  48 }
  49
  50 inline sal_uInt32 ImplGetLowSurrogate(sal_uInt32 nUtf32)
  51 {
  52     assert(nUtf32 >= 0x10000);
  53     return ((nUtf32 - 0x10000) & 0x3FF) | 0xDC00;
  54 }
  55
  56 inline sal_uInt32 ImplCombineSurrogates(sal_uInt32 nHigh, sal_uInt32 nLow)
  57 {
  58     assert(ImplIsHighSurrogate(nHigh) && ImplIsLowSurrogate(nLow));
  59     return (((nHigh & 0x3FF) << 10) | (nLow & 0x3FF)) + 0x10000;
  60 }
  61
  62 #endif
  63
  64 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */