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//-*****************************************************************************
//
// 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 "Foundation.h"
#include "IGroup.h"
#include "IData.h"
#include "IStreams.h"
namespace Alembic {
namespace Ogawa {
namespace ALEMBIC_VERSION_NS {
class IData::PrivateData
{
public:
PrivateData(IStreamsPtr iStreams)
{
streams = iStreams;
};
~PrivateData() {};
IStreamsPtr streams;
// set after freeze
Alembic::Util::uint64_t pos;
Alembic::Util::uint64_t size;
};
IData::~IData()
{
}
IData::IData(IStreamsPtr iStreams,
Alembic::Util::uint64_t iPos,
std::size_t iThreadId) :
mData(new IData::PrivateData(iStreams))
{
mData->size = 0;
// strip off the top bit (indicates data) to get our seek position
mData->pos = iPos & INVALID_GROUP;
Alembic::Util::uint64_t size = 0;
// not the empty group? then figure out our size
if ( mData->pos != 0 )
{
mData->streams->read(iThreadId, mData->pos, 8, &size);
mData->size = size;
}
}
void IData::read(Alembic::Util::uint64_t iSize, void * iData,
Alembic::Util::uint64_t iOffset, std::size_t iThreadId)
{
// don't read anything if we will read beyond our buffer
if (iSize == 0 || mData->size == 0 || iOffset + iSize > mData->size)
{
return;
}
// +8 is to account for the size
mData->streams->read(iThreadId, mData->pos + iOffset + 8, iSize, iData);
}
Alembic::Util::uint64_t IData::getSize() const
{
return mData->size;
}
Alembic::Util::uint64_t IData::getPos() const
{
return mData->pos;
}
} // End namespace ALEMBIC_VERSION_NS
} // End namespace Ogawa
} // End namespace Alembic
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