WebCore/TextCodecICU.h

   1 /*
   2  * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved.
   3  * Copyright (C) 2006 Alexey Proskuryakov <ap@nypop.com>
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  21  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  22  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26
  27 #ifndef TextCodecICU_h
  28 #define TextCodecICU_h
  29
  30 #include "TextCodec.h"
  31 #include "TextEncoding.h"
  32
  33 typedef struct UConverter UConverter;
  34
  35 namespace WebCore {
  36
  37     class TextCodecICU : public TextCodec {
  38     public:
  39         static void registerBaseEncodingNames(EncodingNameRegistrar);
  40         static void registerBaseCodecs(TextCodecRegistrar);
  41
  42         static void registerExtendedEncodingNames(EncodingNameRegistrar);
  43         static void registerExtendedCodecs(TextCodecRegistrar);
  44
  45         TextCodecICU(const TextEncoding&);
  46         virtual ~TextCodecICU();
  47
  48         virtual String decode(const char*, size_t length, bool flush, bool stopOnError, bool& sawError);
  49         virtual CString encode(const UChar*, size_t length, UnencodableHandling);
  50
  51     private:
  52         void createICUConverter() const;
  53         void releaseICUConverter() const;
  54         bool needsGBKFallbacks() const { return m_needsGBKFallbacks; }
  55         void setNeedsGBKFallbacks(bool needsFallbacks) { m_needsGBKFallbacks = needsFallbacks; }
  56
  57         int decodeToBuffer(UChar* buffer, UChar* bufferLimit, const char*& source,
  58             const char* sourceLimit, int32_t* offsets, bool flush, UErrorCode& err);
  59
  60         TextEncoding m_encoding;
  61         unsigned m_numBufferedBytes;
  62         unsigned char m_bufferedBytes[16]; // bigger than any single multi-byte character
  63         mutable UConverter* m_converterICU;
  64         mutable bool m_needsGBKFallbacks;
  65     };
  66
  67     struct ICUConverterWrapper {
  68         ICUConverterWrapper()
  69             : converter(0)
  70         {
  71         }
  72         ~ICUConverterWrapper();
  73
  74         UConverter* converter;
  75     };
  76
  77 } // namespace WebCore
  78
  79 #endif // TextCodecICU_h