sal/textenc/unichars.hxx

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  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 #include <cassert>
  25 #include "sal/types.h"
  26
  27 #define RTL_TEXTENC_UNICODE_REPLACEMENT_CHARACTER 0xFFFD
  28
  29 inline bool ImplIsNoncharacter(sal_uInt32 nUtf32)
  30 {
  31     return (nUtf32 >= 0xFDD0 && nUtf32 <= 0xFDEF)
  32            || (nUtf32 & 0xFFFF) >= 0xFFFE
  33            || nUtf32 > 0x10FFFF;
  34 }
  35     // All code points that are noncharacters, as of Unicode 3.1.1.
  36
  37 bool ImplIsControlOrFormat(sal_uInt32 nUtf32);
  38
  39 inline bool ImplIsHighSurrogate(sal_uInt32 nUtf32)
  40 { return nUtf32 >= 0xD800 && nUtf32 <= 0xDBFF; }
  41     // All code points that are high-surrogates, as of Unicode 3.1.1.
  42
  43 inline bool ImplIsLowSurrogate(sal_uInt32 nUtf32)
  44 { return nUtf32 >= 0xDC00 && nUtf32 <= 0xDFFF; }
  45     // All code points that are low-surrogates, as of Unicode 3.1.1.
  46
  47 bool ImplIsPrivateUse(sal_uInt32 nUtf32);
  48
  49 bool ImplIsZeroWidth(sal_uInt32 nUtf32);
  50
  51 inline sal_uInt32 ImplGetHighSurrogate(sal_uInt32 nUtf32)
  52 {
  53     assert(nUtf32 >= 0x10000);
  54     return ((nUtf32 - 0x10000) >> 10) | 0xD800;
  55 }
  56
  57 inline sal_uInt32 ImplGetLowSurrogate(sal_uInt32 nUtf32)
  58 {
  59     assert(nUtf32 >= 0x10000);
  60     return ((nUtf32 - 0x10000) & 0x3FF) | 0xDC00;
  61 }
  62
  63 inline sal_uInt32 ImplCombineSurrogates(sal_uInt32 nHigh, sal_uInt32 nLow)
  64 {
  65     assert(ImplIsHighSurrogate(nHigh) && ImplIsLowSurrogate(nLow));
  66     return (((nHigh & 0x3FF) << 10) | (nLow & 0x3FF)) + 0x10000;
  67 }
  68
  69 #endif
  70
  71 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */