//-*****************************************************************************
//
// Copyright (c) 2013,
//  Sony Pictures Imageworks Inc. and
//  Industrial Light & Magic, a division of Lucasfilm Entertainment Company Ltd.
//
// 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,
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//
//-*****************************************************************************

#ifndef Alembic_Ogawa_OData_h
#define Alembic_Ogawa_OData_h

#include <Alembic/Util/Export.h>
#include <Alembic/Ogawa/Foundation.h>
#include <Alembic/Ogawa/OStream.h>

namespace Alembic {
namespace Ogawa {
namespace ALEMBIC_VERSION_NS {

class ALEMBIC_EXPORT OData
{
public:

    // creates a default empty group
    OData();

    ~OData();

    // rewrites over part of the already written data, does not change
    // the size of the already written data.  If what is attempting
    // to be rewritten exceeds the boundaries of what is already written,
    // the existing data will be unchanged
    void rewrite(Alembic::Util::uint64_t iSize, void * iData,
                 Alembic::Util::uint64_t iOffset=0);

    Alembic::Util::uint64_t getSize() const;

private:
    friend class OGroup; // friend so we can call the constructor below
    OData(OStreamPtr iStream, Alembic::Util::uint64_t iPos,
          Alembic::Util::uint64_t iSize);

    Alembic::Util::uint64_t getPos() const;

    class PrivateData;
    Alembic::Util::unique_ptr< PrivateData > mData;
};

typedef Alembic::Util::shared_ptr< OData > ODataPtr;

} // End namespace ALEMBIC_VERSION_NS

using namespace ALEMBIC_VERSION_NS;

} // End namespace Ogawa

} // End namespace Alembic

#endif
