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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 <unicode/utypes.h>
     31 #include "wtf/text/TextCodec.h"
     32 #include "wtf/text/TextEncoding.h"
     33 
     34 typedef struct UConverter UConverter;
     35 
     36 namespace WTF {
     37 
     38 class TextCodecInput;
     39 
     40 class TextCodecICU : public TextCodec {
     41 public:
     42     static void registerEncodingNames(EncodingNameRegistrar);
     43     static void registerCodecs(TextCodecRegistrar);
     44 
     45     virtual ~TextCodecICU();
     46 
     47 private:
     48     TextCodecICU(const TextEncoding&);
     49     static PassOwnPtr<TextCodec> create(const TextEncoding&, const void*);
     50 
     51     virtual String decode(const char*, size_t length, bool flush, bool stopOnError, bool& sawError) OVERRIDE;
     52     virtual CString encode(const UChar*, size_t length, UnencodableHandling) OVERRIDE;
     53     virtual CString encode(const LChar*, size_t length, UnencodableHandling) OVERRIDE;
     54 
     55     template<typename CharType>
     56     CString encodeCommon(const CharType*, size_t length, UnencodableHandling);
     57     CString encodeInternal(const TextCodecInput&, UnencodableHandling);
     58 
     59     void createICUConverter() const;
     60     void releaseICUConverter() const;
     61     bool needsGBKFallbacks() const { return m_needsGBKFallbacks; }
     62     void setNeedsGBKFallbacks(bool needsFallbacks) { m_needsGBKFallbacks = needsFallbacks; }
     63 
     64     int decodeToBuffer(UChar* buffer, UChar* bufferLimit, const char*& source,
     65         const char* sourceLimit, int32_t* offsets, bool flush, UErrorCode&);
     66 
     67     TextEncoding m_encoding;
     68     mutable UConverter* m_converterICU;
     69     mutable bool m_needsGBKFallbacks;
     70 };
     71 
     72 struct ICUConverterWrapper {
     73     WTF_MAKE_NONCOPYABLE(ICUConverterWrapper); WTF_MAKE_FAST_ALLOCATED;
     74 public:
     75     ICUConverterWrapper() : converter(0) { }
     76     ~ICUConverterWrapper();
     77 
     78     UConverter* converter;
     79 };
     80 
     81 } // namespace WTF
     82 
     83 #endif // TextCodecICU_h
     84