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/*
//
// Copyright 1997-2009 Torsten Rohlfing
//
// Copyright 2004-2013 SRI International
//
// This file is part of the Computational Morphometry Toolkit.
//
// http://www.nitrc.org/projects/cmtk/
//
// The Computational Morphometry Toolkit 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 3 of
// the License, or (at your option) any later version.
//
// The Computational Morphometry Toolkit 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 the Computational Morphometry Toolkit. If not, see
// <http://www.gnu.org/licenses/>.
//
// $Revision: 5436 $
//
// $LastChangedDate: 2018-12-10 19:01:20 -0800 (Mon, 10 Dec 2018) $
//
// $LastChangedBy: torstenrohlfing $
//
*/
#include "cmtkCompressedStream.h"
#include <bzlib.h>
#include <System/cmtkConsole.h>
#include <System/cmtkExitException.h>
namespace
cmtk
{
CompressedStream::BZip2::BZip2( const std::string& filename )
: m_BzError( 0 )
{
this->m_BzFile = BZ2_bzopen( filename.c_str(), CMTK_FILE_MODE );
if ( !this->m_BzFile )
{
StdErr << "ERROR: CompressedStream::BZip2 could not open file '" << filename << "'\n";
throw ExitException( 1 );
}
}
void
CompressedStream::BZip2::Close()
{
BZ2_bzclose( this->m_BzFile );
}
void
CompressedStream::BZip2::Rewind()
{
StdErr << "CompressedStream::BZip2::Rewind() is not implemented\n";
throw ExitException( 1 );
}
size_t
CompressedStream::BZip2::Read ( void *data, size_t size, size_t count )
{
const size_t bytesRead = BZ2_bzRead( &this->m_BzError, this->m_BzFile, data, size * count );
if ( this->m_BzError < 0 )
{
StdErr << "BZ2_bzRead() returned error " << this->m_BzError << "\n";
throw( ExitException( 1 ) );
}
this->m_BytesRead += bytesRead;
return bytesRead / size;
}
bool
CompressedStream::BZip2::Get ( char &c)
{
if ( this->Feof() || !this->Read( &c, sizeof(char), 1 ) )
return false;
return true;
}
int
CompressedStream::BZip2::Tell () const
{
return this->m_BytesRead;
}
bool
CompressedStream::BZip2::Feof () const
{
return this->m_BzError == BZ_STREAM_END;
}
} // namespace cmtk
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