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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 <System/cmtkConsole.h>
#include <System/cmtkExitException.h>
#include <stdlib.h>
#include <stdio.h>
#include <limits.h>
#include <errno.h>
namespace
cmtk
{
/** \addtogroup System */
//@{
CompressedStream::Pipe::Pipe( const std::string& filename, const char* command )
{
char cmd[PATH_MAX];
#ifndef _MSC_VER
if ( static_cast<size_t>( snprintf( cmd, sizeof( cmd ), command, filename.c_str() ) ) >= sizeof( cmd ) )
{
StdErr << "WARNING: length of path exceeds system PATH_MAX in CompressedStream::OpenDecompressionPipe and will be truncated.\n";
}
errno = 0;
this->m_File = popen( cmd, CMTK_FILE_MODE );
if ( !this->m_File )
{
fprintf( stderr, "ERROR: popen(\"%s\") returned NULL (errno=%d).\n", cmd, errno );
perror( "System message" );
throw 0;
}
#else
this->m_TempName[0] = 0;
if ( snprintf( cmd, sizeof( cmd ), command, filename, tmpnam( this->m_TempName) ) >= sizeof( cmd ) )
{
StdErr << "WARNING: length of path exceeds system PATH_MAX in CompressedStream::OpenDecompressionPipe and will be truncated.\n";
}
_flushall();
int sysReturn = system( cmd );
if ( sysReturn )
{
fprintf( stderr, "Command %s returned %d\n", cmd, sysReturn );
fprintf( stderr, "Errno = %d\n", errno );
}
this->m_File = fopen( this->m_TempName, CMTK_FILE_MODE);
if ( !this->m_File )
{
throw 0;
}
#endif
this->m_BytesRead = 0;
}
CompressedStream::Pipe::~Pipe()
{
this->Close();
}
void
CompressedStream::Pipe::Close()
{
#ifndef _MSC_VER
if ( this->m_File )
{
pclose( this->m_File );
this->m_File = NULL;
}
#else
if ( this->m_TempName[0] )
{
remove( this->m_TempName );
this->m_TempName[0] = 0;
}
#endif // # ifndef _MSC_VER
}
void
CompressedStream::Pipe::Rewind()
{
StdErr << "CompressedStream::Pipe::Rewind() is not implemented\n";
throw ExitException( 1 );
}
size_t
CompressedStream::Pipe::Read( void *data, size_t size, size_t count )
{
const size_t result = fread( data, size, count, this->m_File );
this->m_BytesRead += result;
return result / size;
}
bool
CompressedStream::Pipe::Get ( char &c)
{
const int data = fgetc( this->m_File );
if ( data != EOF )
{
c=(char) data;
++this->m_BytesRead;
return true;
}
return false;
}
int
CompressedStream::Pipe::Tell () const
{
return this->m_BytesRead;
}
bool
CompressedStream::Pipe::Feof () const
{
return (feof( this->m_File ) != 0);
}
} // namespace cmtk
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