gdcmVR.cxx

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/*=========================================================================
                                                                                
  Program:   gdcm
  Module:    $RCSfile: gdcmVR.cxx,v $
  Language:  C++
  Date:      $Date: 2007/06/22 10:02:48 $
  Version:   $Revision: 1.56 $
                                                                                
  Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
  l'Image). All rights reserved. See Doc/License.txt or
  http://www.creatis.insa-lyon.fr/Public/Gdcm/License.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 notices for more information.
                                                                                
=========================================================================*/

#include "gdcmVR.h"
#include "gdcmUtil.h"
#include "gdcmDictSet.h"
#include "gdcmDebug.h"

#include <fstream>
#include <iostream>
#include <string.h>

namespace GDCM_NAME_SPACE 
{
//-----------------------------------------------------------------------------
void FillDefaultVRDict(VRHT &vr);

//-----------------------------------------------------------------------------
// Constructor / Destructor
VR::VR() 
{
   std::string filename = DictSet::BuildDictPath() + DICT_VR;
   std::ifstream from(filename.c_str());
   if ( !from )
   {
      gdcmWarningMacro("Can't open dictionary " << filename.c_str());
      FillDefaultVRDict(vr);
   }
   else
   {
      char buff[1024];
      VRKey key;
      VRAtr name;
   
      while (!from.eof()) 
      {
         from >> std::ws;
         from.getline(buff, 1024, ' ');
         if( strcmp(buff,"") == 0)
            continue;

         key = buff;
         from >> std::ws;
         from.getline(buff, 1024, ';');
         name = buff;
   
         from >> std::ws;
         from.getline(buff, 1024, '\n');
   
         vr[key] = name;
      }
      from.close();
   }
}

VR::~VR()
{
   vr.clear();
}

//-----------------------------------------------------------------------------
// Public

bool VR::IsVROfBinaryRepresentable(VRKey const &tested)
{
   if ( IsVROfStringRepresentable(tested) )
      return false;

   if ( IsVROfSequence(tested) )
      return false;

   return true;
}

bool VR::IsVROfStringRepresentable(VRKey const &tested)
{
   return tested == "AE" ||
          tested == "AS" ||
          tested == "CS" ||
          tested == "DA" ||
          tested == "DS" ||
          tested == "FL" ||
          tested == "FD" ||
          tested == "IS" || 
          tested == "LO" ||
          tested == "LT" ||
          tested == "PN" ||
          tested == "SH" ||
          tested == "SL" ||
          tested == "SS" ||
          tested == "ST" ||
          tested == "TM" ||
          tested == "UI" ||
          tested == "UL" ||
          tested == "US" ||
          tested == "UT";

   // Should be quicker
   // --> will *never* work : any rotten value would be considered as OK !
/*
   return tested != "OB" &&
          tested != "OW" &&
          tested != "OF" &&
          tested != "AT" && // Attribute Tag ?!? contain no printable character
          tested != "UN" && // UN is an actual VR !
          tested != "SQ" ;
*/
}
unsigned short VR::GetAtomicElementLength(VRKey const &tested)
{
   // Unsigned & signed short
   if( tested == "US" || tested == "SS" )
      return 2;
   // Unsigned & signed long
   if( tested == "UL" || tested == "SL" )
      return 4;
   // Float
   if( tested == "FL" )
      return 4;
   // Double
   if( tested == "FD" )
      return 8;
   // Word string
   if( tested == "OW" )
      return 2;
   // Float string
   if( tested == "OF" )
      return 4;   
   return 1;
}

// VS6 need a single implementation in the dll
#if defined(_MSC_VER) && (_MSC_VER == 1200)

bool VR::IsValidVR(VRKey const &tested)
{
//  return vr.find(key) != vr.end();
  static const char VRvalues[] =
    "AEASCSDADSFLFDISLOLTPNSHSLSSSTTMUIULUSUTOBOWOFATUNSQ";

  int nbVal = 26;
  const char *pt = VRvalues;
  for (int i=0;i<nbVal;i++)
  {
     if(tested[0] == *pt++) {
       if(tested[1] == *pt++)
          return true;
     }  
     else {
        pt++;
     }        
  }
  return false;

}
#endif

//-----------------------------------------------------------------------------
// Protected

//-----------------------------------------------------------------------------
// Private

//-----------------------------------------------------------------------------
// Print
void VR::Print(std::ostream &os,std::string const &) 
{
   for (VRHT::iterator it = vr.begin(); it != vr.end(); ++it)
   {
      os << "VR : " << it->first << " = " << it->second << std::endl;
   }
}

//-----------------------------------------------------------------------------
} // end namespace gdcm

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