UTF8Decoder.h++

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/* ---------------------------------------------------------------------------
   commonc++ - A C++ Common Class Library
   Copyright (C) 2005-2014  Mark A Lindner

   This file is part of commonc++.

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.

   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with this library; if not, write to the Free
   Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   ---------------------------------------------------------------------------
*/

#ifndef __ccxx_UTF8Decoder_hxx
#define __ccxx_UTF8Decoder_hxx

#include <commonc++/UTFDecoder.h++>

namespace ccxx {

class COMMONCPP_API UTF8Decoder : public UTFDecoder
{
 public:

  UTF8Decoder();

  ~UTF8Decoder();

  int decode(const char** input, int* inputCountLeft,
             char16_t** output, int* outputCountLeft);

  void setStopDecodingAtNulChar(bool stopDecodingAtNulChar)
  { _stopDecodingAtNulChar = stopDecodingAtNulChar; }

  void reset();

  static int decodedLength(const char* buf, int length, int maxLength = 0);

 private:

  int _bytesExpected;
  uint32_t _char32;
  bool _pendingChar;
  bool _stopDecodingAtNulChar;

  CCXX_COPY_DECLS(UTF8Decoder);
};

} // namespace ccxx

#endif // __ccxx_UTF8Decoder_hxx