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/*=========================================================================
Program: GDCM (Grassroots DICOM). A DICOM library
Copyright (c) 2006-2011 Mathieu Malaterre
All rights reserved.
See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "gdcmByteSwapFilter.h"
#include "gdcmElement.h"
#include "gdcmByteValue.h"
#include "gdcmSequenceOfFragments.h"
#include "gdcmSequenceOfItems.h"
#include "gdcmSwapper.h"
namespace gdcm
{
//-----------------------------------------------------------------------------
//ByteSwapFilter::ByteSwapFilter()
//{
//}
//-----------------------------------------------------------------------------
ByteSwapFilter::~ByteSwapFilter()
{
}
bool ByteSwapFilter::ByteSwap()
{
for(
DataSet::ConstIterator it = DS.Begin();
it != DS.End(); ++it)
{
const DataElement &de = *it;
VR const & vr = de.GetVR();
//assert( vr & VR::VRASCII || vr & VR::VRBINARY );
const ByteValue *bv = de.GetByteValue();
gdcm::SmartPointer<gdcm::SequenceOfItems> si = de.GetValueAsSQ();
if( de.IsEmpty() )
{
}
else if( bv && !si )
{
assert( !si );
// ASCII do not need byte swap
if( vr & VR::VRBINARY /*&& de.GetTag().IsPrivate()*/ )
{
//assert( de.GetTag().IsPrivate() );
switch(vr)
{
case VR::AT:
assert( 0 && "Should not happen" );
break;
case VR::FL:
// FIXME: Technically FL should not be byte-swapped...
//std::cerr << "ByteSwap FL:" << de.GetTag() << std::endl;
SwapperDoOp::SwapArray((uint32_t*)bv->GetPointer(), bv->GetLength() / sizeof(uint32_t) );
break;
case VR::FD:
assert( 0 && "Should not happen" );
break;
case VR::OB:
// I think we are fine, unless this is one of those OB_OW thingy
break;
case VR::OF:
assert( 0 && "Should not happen" );
break;
case VR::OW:
assert( 0 && "Should not happen" );
break;
case VR::SL:
SwapperDoOp::SwapArray((uint32_t*)bv->GetPointer(), bv->GetLength() / sizeof(uint32_t) );
break;
case VR::SQ:
assert( 0 && "Should not happen" );
break;
case VR::SS:
SwapperDoOp::SwapArray((uint16_t*)bv->GetPointer(), bv->GetLength() / sizeof(uint16_t) );
break;
case VR::UL:
SwapperDoOp::SwapArray((uint32_t*)bv->GetPointer(), bv->GetLength() / sizeof(uint32_t) );
break;
case VR::UN:
assert( 0 && "Should not happen" );
break;
case VR::US:
SwapperDoOp::SwapArray((uint16_t*)bv->GetPointer(), bv->GetLength() / sizeof(uint16_t) );
break;
case VR::UT:
assert( 0 && "Should not happen" );
break;
default:
assert( 0 && "Should not happen" );
}
}
}
//else if( const SequenceOfItems *si = de.GetSequenceOfItems() )
else if( si )
{
//if( de.GetTag().IsPrivate() )
{
//std::cerr << "ByteSwap SQ:" << de.GetTag() << std::endl;
SequenceOfItems::ConstIterator it2 = si->Begin();
for( ; it2 != si->End(); ++it2)
{
const Item &item = *it2;
DataSet &ds = const_cast<DataSet&>(item.GetNestedDataSet()); // FIXME
ByteSwapFilter bsf(ds);
bsf.ByteSwap();
}
}
}
else if( const SequenceOfFragments *sf = de.GetSequenceOfFragments() )
{
(void)sf;
assert( 0 && "Should not happen" );
}
else
{
assert( 0 && "error" );
}
}
if( ByteSwapTag )
{
DataSet copy;
DataSet::ConstIterator it = DS.Begin();
for( ; it != DS.End(); ++it)
{
DataElement de = *it;
const Tag& tag = de.GetTag();
de.SetTag(
Tag( SwapperDoOp::Swap( tag.GetGroup() ), SwapperDoOp::Swap( tag.GetElement() ) ) );
copy.Insert( de );
DS.Remove( de.GetTag() );
}
DS = copy;
}
return true;
}
}
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