/*=========================================================================

Program:   Visualization Toolkit
Module:    vtkUTF16TextCodec.h

Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
/*-------------------------------------------------------------------------
  Copyright 2008 Sandia Corporation.
  Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
  the U.S. Government retains certain rights in this software.
-------------------------------------------------------------------------*/
// .NAME vtkUTF16TextCodec - Class to read/write ascii text.
//
// .SECTION Description
// A virtual class interface for codecs that readers/writers can rely on
//
// .SECTION Thanks
// Thanks to Tim Shed from Sandia National Laboratories for his work
// on the concepts and to Marcus Hanwell and Jeff Baumes of Kitware for
// keeping me out of the weeds
//
// .SECTION See Also
// vtkUTF16TextCodecFactory
//

#ifndef vtkUTF16TextCodec_h
#define vtkUTF16TextCodec_h

#include "vtkIOCoreModule.h" // For export macro
#include "vtkTextCodec.h"


class VTKIOCORE_EXPORT vtkUTF16TextCodec : public vtkTextCodec
{
public:
  vtkTypeMacro(vtkUTF16TextCodec, vtkTextCodec);
  static vtkUTF16TextCodec* New() ;
  void PrintSelf(ostream& os, vtkIndent indent);

  // Description:
  // The name this codec goes by - should match the string the factory will take to create it
  virtual const char* Name() ;
  virtual bool CanHandle(const char* NameString) ;

  // Description:
  // Set the endianness - true if Big false is little
  void SetBigEndian(bool) ;

  // Description:
  // Set the endianness - true if Big false is little
  void FindEndianness(istream& InputStream) ;

  // Description:
  // is the given sample valid for this codec? - will take endianness into account
  virtual bool IsValid(istream& InputStream) ;

  // Description:
  // Iterate through the sequence represented by the begin and end iterators assigning the result
  // to the output iterator.  This is the current pattern in vtkDelimitedTextReader
  virtual void ToUnicode(istream& InputStream,
                         vtkTextCodec::OutputIterator& output) ;

  // Description:
  // Return the next code point from the sequence represented by the begin, end iterators
  // advancing begin through however many places needed to assemble that code point
  virtual vtkUnicodeString::value_type  NextUnicode(istream& inputStream) ;

protected:
  vtkUTF16TextCodec() ;
  ~vtkUTF16TextCodec() ;

  bool _endianExplicitlySet ;
  bool _bigEndian ;

private:
  vtkUTF16TextCodec(const vtkUTF16TextCodec &) ; // Not implemented.
  void operator=(const vtkUTF16TextCodec &) ; // Not implemented.

};


#endif
