//-*****************************************************************************

//

// 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,

// 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.

//

//-*****************************************************************************

#include <Alembic/Ogawa/OGroup.h>

#include <Alembic/Ogawa/OData.h>

#include <Alembic/Ogawa/OStream.h>

namespace Alembic {

namespace Ogawa {

namespace ALEMBIC_VERSION_NS {

class OData::PrivateData

{

public:

    // for the empty dataset

    PrivateData()

    {

        pos = 0;

        size = 0;

    }

    PrivateData(OStreamPtr iStream,

                Alembic::Util::uint64_t iPos,

                Alembic::Util::uint64_t iSize) :

        stream(iStream), pos(iPos), size(iSize) {}

    ~PrivateData() {}

    OStreamPtr stream;

    Alembic::Util::uint64_t pos;

    Alembic::Util::uint64_t size;

};

OData::OData() : mData(new OData::PrivateData())

{

}

OData::OData(OStreamPtr iStream,

             Alembic::Util::uint64_t iPos,

             Alembic::Util::uint64_t iSize)

    : mData(new OData::PrivateData(iStream, iPos, iSize))

{

}

OData::~OData()

{

}

void OData::rewrite(Alembic::Util::uint64_t iSize, void * iData,

                    Alembic::Util::uint64_t iOffset)

{

    // don't write anything if we will write beyond our buffer or the

    // stream is invalid

    if (!mData->stream || iSize == 0 || mData->size == 0 ||

        iOffset + iSize > mData->size)

    {

        return;

    }

    // +8 is to account for the written out size

    mData->stream->seek(mData->pos + iOffset + 8);

    mData->stream->write(iData, iSize);

}

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

{

    return mData->size;

}

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

{

    return mData->pos;

}

} // End namespace ALEMBIC_VERSION_NS

} // End namespace Ogawa

} // End namespace Alembic