/usr/include/CLAM/ReadingRegion.hxx is in libclam-dev 1.4.0-6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (c) 2004 MUSIC TECHNOLOGY GROUP (MTG)
* UNIVERSITAT POMPEU FABRA
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef ReadingRegion_hxx
#define ReadingRegion_hxx
#include "Region.hxx"
#include "StreamImpl.hxx"
namespace CLAM
{
template<class WritingRegion>
class ReadingRegion : public Region
{
typedef typename WritingRegion::ProperStream ProperStream;
typedef typename WritingRegion::ProperToken ProperToken;
public:
ReadingRegion();
~ReadingRegion();
void LinkAndNotifySizeToStream( ProperStream& stream );
ProperStream& Stream();
/** Condition of overlap between reading and writing regions.
Returns true if are not overlapping so it can consume
*/
bool CanConsume();
/**
This method must be called when the data of the reading-region has been
already readen (consumed) and we want to advance the region position
for further readings (consumes)
*/
void Consume();
void LinkProducerRegion( Region& writing);
// const?? TODO
ProperToken& operator[](int offset);
Region* ProducerRegion();
void RemoveProducer();
ReadingRegionsIterator BeginReaders();
ReadingRegionsIterator EndReaders();
private:
void SizeChanged(const int & newSize);
ProperStream* mAttachedStream;
Region* mProducingRegion;
};
/////// Implementation ////////
template<class WritingRegion>
ReadingRegion<WritingRegion>::ReadingRegion()
: mAttachedStream(0), mProducingRegion(0)
{
}
template<class WritingRegion>
ReadingRegion<WritingRegion>::~ReadingRegion()
{
if(mProducingRegion)
mProducingRegion->RemoveRegion( *this );
}
template<class WritingRegion>
void ReadingRegion<WritingRegion>::LinkAndNotifySizeToStream( ProperStream& stream )
{
mAttachedStream = &stream;
mAttachedStream->NewReadingRegionSize( *this );
}
template<class WritingRegion>
typename ReadingRegion<WritingRegion>::ProperStream & ReadingRegion<WritingRegion>::Stream()
{
return *(mAttachedStream);
}
template<class WritingRegion>
bool ReadingRegion<WritingRegion>::CanConsume()
{
if(!mProducingRegion)
return false;
return ProducerRegion()->Pos() >= Pos()+Size();
}
template<class WritingRegion>
void ReadingRegion<WritingRegion>::Consume()
{
CLAM_DEBUG_ASSERT( CanConsume(), "ReadingRegion::Consume() - region can't consume" );
Pos( Pos() + Hop() );
mAttachedStream->ReaderHasAdvanced( *this );
}
template<class WritingRegion>
void ReadingRegion<WritingRegion>::LinkProducerRegion( Region& writing)
{
mProducingRegion = &writing;
// it starts at the same position than the writer is in this exact moment
Pos( writing.Pos() );
BeginDistance( writing.BeginDistance() );
}
template<class WritingRegion>
typename ReadingRegion<WritingRegion>::ProperToken & ReadingRegion<WritingRegion>::operator[](int offset)
{
CLAM_DEBUG_ASSERT( mAttachedStream, "ReadingRegion operator[] - No attached stream" );
CLAM_DEBUG_ASSERT( 0 <= offset && offset < Size(), "ReadingRegion operator[] - Index out of bounds" );
CLAM_DEBUG_ASSERT( CanConsume(), "ReadingRegion operator[] - region can't consume" );
int physicalIndex = BeginDistance() + offset;
return mAttachedStream->operator[](physicalIndex);
}
template<class WritingRegion>
Region* ReadingRegion<WritingRegion>::ProducerRegion()
{
return mProducingRegion;
}
template<class WritingRegion>
void ReadingRegion<WritingRegion>::RemoveProducer()
{
mProducingRegion = 0;
mAttachedStream = 0;
}
template<class WritingRegion>
typename ReadingRegion<WritingRegion>::ReadingRegionsIterator ReadingRegion<WritingRegion>::BeginReaders()
{
throw 0;
}
template<class WritingRegion>
typename ReadingRegion<WritingRegion>::ReadingRegionsIterator ReadingRegion<WritingRegion>::EndReaders()
{
throw 0;
}
template<class WritingRegion>
void ReadingRegion<WritingRegion>::SizeChanged(const int & newSize)
{
if (mAttachedStream)
mAttachedStream->NewReadingRegionSize(*this);
}
} // namespace CLAM
#endif // __ReadingRegion_hxx__
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