third_party/WebKit/Source/wtf/text/TextCodecUTF8.h

   1 /*
   2  * Copyright (C) 2011 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef TextCodecUTF8_h
  27 #define TextCodecUTF8_h
  28
  29 #include "wtf/text/TextCodec.h"
  30
  31 namespace WTF {
  32
  33 class TextCodecUTF8 : public TextCodec {
  34 public:
  35     static void registerEncodingNames(EncodingNameRegistrar);
  36     static void registerCodecs(TextCodecRegistrar);
  37
  38 protected:
  39     TextCodecUTF8() : m_partialSequenceSize(0) { }
  40
  41 private:
  42     static PassOwnPtr<TextCodec> create(const TextEncoding&, const void*);
  43
  44     String decode(const char*, size_t length, FlushBehavior, bool stopOnError, bool& sawError) override;
  45     CString encode(const UChar*, size_t length, UnencodableHandling) override;
  46     CString encode(const LChar*, size_t length, UnencodableHandling) override;
  47
  48     template<typename CharType>
  49     CString encodeCommon(const CharType* characters, size_t length);
  50
  51     template <typename CharType>
  52     bool handlePartialSequence(CharType*& destination, const uint8_t*& source, const uint8_t* end, bool flush, bool stopOnError, bool& sawError);
  53     void handleError(UChar*& destination, bool stopOnError, bool& sawError);
  54     void consumePartialSequenceByte();
  55
  56     int m_partialSequenceSize;
  57     uint8_t m_partialSequence[U8_MAX_LENGTH];
  58
  59 };
  60
  61 } // namespace WTF
  62
  63 #endif // TextCodecUTF8_h