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/*
*
* Copyright (C) 1994-2010, OFFIS e.V.
* All rights reserved. See COPYRIGHT file for details.
*
* This software and supporting documentation were developed by
*
* OFFIS e.V.
* R&D Division Health
* Escherweg 2
* D-26121 Oldenburg, Germany
*
*
* Module: dcmdata
*
* Author: Marco Eichelberg
*
* Purpose: base classes for output streams
*
* Last Update: $Author: joergr $
* Update Date: $Date: 2010-10-14 13:14:08 $
* CVS/RCS Revision: $Revision: 1.5 $
* Status: $State: Exp $
*
* CVS/RCS Log at end of file
*
*/
#include "dcmtk/config/osconfig.h"
#include "dcmtk/dcmdata/dcostrma.h"
#include "dcmtk/dcmdata/dcostrmz.h" /* for DcmZLibOutputFilter */
#include "dcmtk/dcmdata/dcerror.h" /* for EC_IllegalCall */
DcmOutputStream::DcmOutputStream(DcmConsumer *initial)
: current_(initial)
, compressionFilter_(NULL)
, tell_(0)
{
}
DcmOutputStream::~DcmOutputStream()
{
// we cannot access the stream anymore at this point because the
// consumer has most probably already been deleted.
delete compressionFilter_;
}
OFCondition DcmOutputStream::installCompressionFilter(E_StreamCompression filterType)
{
OFCondition result = EC_Normal;
if (compressionFilter_) result = EC_DoubleCompressionFilters;
else
{
switch (filterType)
{
#ifdef WITH_ZLIB
case ESC_zlib:
compressionFilter_ = new DcmZLibOutputFilter();
if (compressionFilter_)
{
compressionFilter_->append(*current_);
current_ = compressionFilter_;
} else result = EC_MemoryExhausted;
break;
#endif
case ESC_none:
case ESC_unsupported:
result = EC_UnsupportedEncoding;
break;
}
}
return result;
}
OFBool DcmOutputStream::good() const
{
return current_->good();
}
OFCondition DcmOutputStream::status() const
{
return current_->status();
}
OFBool DcmOutputStream::isFlushed() const
{
return current_->isFlushed();
}
offile_off_t DcmOutputStream::avail() const
{
return current_->avail();
}
offile_off_t DcmOutputStream::write(const void *buf, offile_off_t buflen)
{
offile_off_t result = current_->write(buf, buflen);
tell_ += result;
return result;
}
void DcmOutputStream::flush()
{
current_->flush();
}
offile_off_t DcmOutputStream::tell() const
{
return tell_;
}
/*
* CVS/RCS Log:
* $Log: dcostrma.cc,v $
* Revision 1.5 2010-10-14 13:14:08 joergr
* Updated copyright header. Added reference to COPYRIGHT file.
*
* Revision 1.4 2009-11-04 09:58:10 uli
* Switched to logging mechanism provided by the "new" oflog module
*
* Revision 1.3 2007-02-19 16:06:10 meichel
* Class DcmOutputStream and related classes are now safe for use with
* large files (2 GBytes or more) if supported by compiler and operating system.
*
* Revision 1.2 2005/12/08 15:41:20 meichel
* Changed include path schema for all DCMTK header files
*
* Revision 1.1 2002/08/27 16:55:52 meichel
* Initial release of new DICOM I/O stream classes that add support for stream
* compression (deflated little endian explicit VR transfer syntax)
*
*
*/
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