IData.cpp
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#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
Alembic::Ogawa::ALEMBIC_VERSION_NS
Definition IArchive.cpp:40
Alembic::Ogawa
Definition OgawaFwd.h:78
Alembic
Definition OgawaFwd.h:77