GDCM 2.2.1

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GenSeqs.cxx
/*=========================================================================
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 "gdcmReader.h"
#include "gdcmWriter.h"
#include "gdcmItem.h"
#include "gdcmImageReader.h"
#include "gdcmSequenceOfItems.h"
#include "gdcmFile.h"
#include "gdcmTag.h"
/*
* This example is used to generate the file:
*
* gdcmConformanceTests/SequenceWithUndefinedLengthNotConvertibleToDefinedLength.dcm
*
* There is a flaw in the DICOM design were it is assumed that Sequence can be
* either represented as undefined length or defined length. This should work
* in most case, but the undefined length is a little more general and can
* store sequence of items that a defined length cannot.
* Deflated syntax was used in this case since this synthetic example can be
* nicely compressed using this transfer syntax.
*
* Warning: do not try to compute the group length elements !
* Warning: You may need a 64bits machine for this example to work.
*/
int main(int argc, char *argv[])
{
if( argc < 3 )
{
std::cerr << argv[0] << " input.dcm output.dcm" << std::endl;
return 1;
}
const char *filename = argv[1];
const char *outfilename = argv[2];
gdcm::Reader reader;
reader.SetFileName( filename );
if( !reader.Read() )
{
return 1;
}
gdcm::File &file = reader.GetFile();
gdcm::DataSet &ds = file.GetDataSet();
//const unsigned int nitems = 1000;
const unsigned int ptr_len = 42; /*94967296 / nitems; */
//assert( ptr_len == 42949672 );
char *ptr = new char[ptr_len];
memset(ptr,0,ptr_len);
// Create a Sequence
gdcm::SmartPointer<gdcm::SequenceOfItems> sq = new gdcm::SequenceOfItems();
sq->SetLengthToUndefined();
const char owner_str[] = "GDCM CONFORMANCE TESTS";
gdcm::DataElement owner( gdcm::Tag(0x4d4d, 0x10) );
owner.SetByteValue(owner_str, (uint32_t)strlen(owner_str));
owner.SetVR( gdcm::VR::LO );
for(unsigned int idx = 0; idx < 10/* nitems*/; ++idx)
{
// Create a dataelement
gdcm::DataElement de( gdcm::Tag(0x4d4d, 0x1002) );
de.SetByteValue(ptr, ptr_len);
de.SetVR( gdcm::VR::OB );
// Create an item
gdcm::Item it;
it.SetVLToUndefined();
gdcm::DataSet &nds = it.GetNestedDataSet();
nds.Insert(owner);
nds.Insert(de);
sq->AddItem(it);
}
// Insert sequence into data set
gdcm::DataElement des( gdcm::Tag(0x4d4d,0x1001) );
des.SetVR(gdcm::VR::SQ);
des.SetValue(*sq);
des.SetVLToUndefined();
ds.Insert(owner);
ds.Insert(des);
gdcm::Writer w;
w.SetFile( file );
//w.SetCheckFileMetaInformation( true );
w.SetFileName( outfilename );
if (!w.Write() )
{
return 1;
}
return 0;
}