WebCore/TextDecoder.h

   1 /*
   2  * Copyright (C) 2004, 2006 Apple Computer, 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 TextDecoder_h
  27 #define TextDecoder_h
  28
  29 #include "PlatformString.h"
  30 #include "TextCodec.h"
  31 #include "TextEncoding.h"
  32 #include <wtf/OwnPtr.h>
  33
  34 namespace WebCore {
  35
  36     class TextCodec;
  37
  38     class TextDecoder {
  39     public:
  40         TextDecoder(const TextEncoding&);
  41         void reset(const TextEncoding&);
  42         const TextEncoding& encoding() const { return m_encoding; };
  43
  44         String decode(const char* data, size_t length, bool flush, bool stopOnError, bool& sawError)
  45         {
  46             if (!m_checkedForBOM)
  47                 return checkForBOM(data, length, flush, stopOnError, sawError);
  48             return m_codec->decode(data, length, flush, stopOnError, sawError);
  49         }
  50
  51     private:
  52         String checkForBOM(const char*, size_t length, bool flush, bool stopOnError, bool& sawError);
  53
  54         TextEncoding m_encoding;
  55         OwnPtr<TextCodec> m_codec;
  56
  57         bool m_checkedForBOM;
  58         unsigned char m_numBufferedBytes;
  59         unsigned char m_bufferedBytes[3];
  60     };
  61
  62 } // namespace WebCore
  63
  64 #endif // TextDecoder_h