///////////////////////////////////////////////////////////////////////////

//

// Copyright (c) 2004, Industrial Light & Magic, a division of Lucas

// Digital Ltd. LLC

// 

// All rights reserved.

// 

// Redistribution and use in source and binary forms, with or without

// modification, are permitted provided that the following conditions are

// met:

// *       Redistributions of source code must retain the above copyright

// notice, this list of conditions and the following disclaimer.

// *       Redistributions in binary form must reproduce the above

// copyright notice, this list of conditions and the following disclaimer

// in the documentation and/or other materials provided with the

// distribution.

// *       Neither the name of Industrial Light & Magic nor the names of

// its contributors may be used to endorse or promote products derived

// from this software without specific prior written permission. 

// 

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

//

///////////////////////////////////////////////////////////////////////////

#ifndef INCLUDED_IMF_STD_IO_H

#define INCLUDED_IMF_STD_IO_H

//-----------------------------------------------------------------------------

//

//  Low-level file input and output for OpenEXR

//  based on C++ standard iostreams.

//

//-----------------------------------------------------------------------------

#include "ImfIO.h"

#include "ImfNamespace.h"

#include "ImfExport.h"

#include <fstream>

#include <sstream>

OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_ENTER

//-------------------------------------------

// class StdIFStream -- an implementation of

// class OPENEXR_IMF_INTERNAL_NAMESPACE::IStream based on class std::ifstream

//-------------------------------------------

class StdIFStream: public OPENEXR_IMF_INTERNAL_NAMESPACE::IStream

{

  public:

    //-------------------------------------------------------

    // A constructor that opens the file with the given name.

    // The destructor will close the file.

    //-------------------------------------------------------

    IMF_EXPORT

    StdIFStream (const char fileName[]);

    //---------------------------------------------------------

    // A constructor that uses a std::ifstream that has already

    // been opened by the caller.  The StdIFStream's destructor

    // will not close the std::ifstream.

    //---------------------------------------------------------

    IMF_EXPORT

    StdIFStream (std::ifstream &is, const char fileName[]);

    IMF_EXPORT

    virtual ~StdIFStream ();

    IMF_EXPORT

    virtual bool  read (char c[/*n*/], int n);

    IMF_EXPORT

    virtual Int64 tellg ();

    IMF_EXPORT

    virtual void  seekg (Int64 pos);

    IMF_EXPORT

    virtual void  clear ();

  private:

    std::ifstream * _is;

    bool    _deleteStream;

};

//-------------------------------------------

// class StdOFStream -- an implementation of

// class OPENEXR_IMF_INTERNAL_NAMESPACE::OStream based on class std::ofstream

//-------------------------------------------

class StdOFStream: public OPENEXR_IMF_INTERNAL_NAMESPACE::OStream

{

  public:

    //-------------------------------------------------------

    // A constructor that opens the file with the given name.

    // The destructor will close the file.

    //-------------------------------------------------------

    IMF_EXPORT

    StdOFStream (const char fileName[]);

    //---------------------------------------------------------

    // A constructor that uses a std::ofstream that has already

    // been opened by the caller.  The StdOFStream's destructor

    // will not close the std::ofstream.

    //---------------------------------------------------------

    IMF_EXPORT

    StdOFStream (std::ofstream &os, const char fileName[]);

    IMF_EXPORT

    virtual ~StdOFStream ();

    IMF_EXPORT

    virtual void  write (const char c[/*n*/], int n);

    IMF_EXPORT

    virtual Int64 tellp ();

    IMF_EXPORT

    virtual void  seekp (Int64 pos);

  private:

    std::ofstream * _os;

    bool    _deleteStream;

};

//------------------------------------------------

// class StdOSStream -- an implementation of class

// OPENEXR_IMF_INTERNAL_NAMESPACE::OStream, based on class std::ostringstream

//------------------------------------------------

class StdOSStream: public OPENEXR_IMF_INTERNAL_NAMESPACE::OStream

{

  public:

    IMF_EXPORT

    StdOSStream ();

    IMF_EXPORT

    virtual void  write (const char c[/*n*/], int n);

    IMF_EXPORT

    virtual Int64 tellp ();

    IMF_EXPORT

    virtual void  seekp (Int64 pos);

    IMF_EXPORT

    std::string   str () const {return _os.str();}

  private:

    std::ostringstream  _os;

};

OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_EXIT

#endif