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      1 /*
      2  * Copyright (C) 2004, 2006, 2007, 2011 Apple Inc. All rights reserved.
      3  * Copyright (C) 2006 Alexey Proskuryakov <ap (at) 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 #include <unicode/utypes.h>
     33 
     34 typedef struct UConverter UConverter;
     35 
     36 namespace WebCore {
     37 
     38     class TextCodecICU : public TextCodec {
     39     public:
     40         static void registerEncodingNames(EncodingNameRegistrar);
     41         static void registerCodecs(TextCodecRegistrar);
     42 
     43         virtual ~TextCodecICU();
     44 
     45     private:
     46         TextCodecICU(const TextEncoding&);
     47         static PassOwnPtr<TextCodec> create(const TextEncoding&, const void*);
     48 
     49         virtual String decode(const char*, size_t length, bool flush, bool stopOnError, bool& sawError);
     50         virtual CString encode(const UChar*, size_t length, UnencodableHandling);
     51 
     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() : converter(0) { }
     69         ~ICUConverterWrapper();
     70 
     71         UConverter* converter;
     72 
     73         WTF_MAKE_NONCOPYABLE(ICUConverterWrapper);
     74     };
     75 
     76 } // namespace WebCore
     77 
     78 #endif // TextCodecICU_h
     79