This file is indexed.

/usr/include/gdcm-2.4/gdcmUNExplicitDataElement.txx is in libgdcm2-dev 2.4.4-3+deb8u1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
/*=========================================================================

  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.

=========================================================================*/

#ifndef GDCMUNEXPLICITDATAELEMENT_TXX
#define GDCMUNEXPLICITDATAELEMENT_TXX

#include "gdcmSequenceOfItems.h"
#include "gdcmSequenceOfFragments.h"
#include "gdcmVL.h"
#include "gdcmParseException.h"

#include "gdcmValueIO.h"
#include "gdcmSwapper.h"

namespace gdcm
{

//-----------------------------------------------------------------------------
template <typename TSwap>
std::istream &UNExplicitDataElement::Read(std::istream &is)
{
  ReadPreValue<TSwap>(is);
  return ReadValue<TSwap>(is);
}

template <typename TSwap>
std::istream &UNExplicitDataElement::ReadPreValue(std::istream &is)
{
  TagField.Read<TSwap>(is);
  // See PS 3.5, Data Element Structure With UNExplicit VR
  // Read Tag
  if( !is )
    {
    if( !is.eof() ) // FIXME This should not be needed
      {
      assert(0 && "Should not happen" );
      }
    return is;
    }
  if( TagField == Tag(0xfffe,0xe0dd) )
    {
    ParseException pe;
    pe.SetLastElement( *this );
    throw pe;
    }
  assert( TagField != Tag(0xfffe,0xe0dd) );

  const Tag itemDelItem(0xfffe,0xe00d);
  if( TagField == itemDelItem )
    {
    if( !ValueLengthField.Read<TSwap>(is) )
      {
      assert(0 && "Should not happen");
      return is;
      }
    if( ValueLengthField != 0 )
      {
      gdcmDebugMacro(
        "Item Delimitation Item has a length different from 0" );
      }
    // Set pointer to NULL to avoid user error
    ValueField = 0;
    VRField = VR::INVALID;
    return is;
    }

  // Read VR
  try
    {
    if( !VRField.Read(is) )
      {
      assert(0 && "Should not happen" );
      return is;
      }
    }
  catch( Exception &ex )
    {
#ifdef GDCM_SUPPORT_BROKEN_IMPLEMENTATION
    // gdcm-MR-PHILIPS-16-Multi-Seq.dcm
    // assert( TagField == Tag(0xfffe, 0xe000) );
    // -> For some reason VR is written as {44,0} well I guess this is a VR...
    // Technically there is a second bug, dcmtk assume other things when reading this tag,
    // so I need to change this tag too, if I ever want dcmtk to read this file. oh well
    // 0019004_Baseline_IMG1.dcm
    // -> VR is garbage also...
    // assert( TagField == Tag(8348,0339) || TagField == Tag(b5e8,0338))
    //gdcmWarningMacro( "Assuming 16 bits VR for Tag=" <<
    //  TagField << " in order to read a buggy DICOM file." );
    //VRField = VR::INVALID;
    (void)ex;
    ParseException pe;
    pe.SetLastElement( *this );
    throw pe;
#else
  throw ex;
#endif /* GDCM_SUPPORT_BROKEN_IMPLEMENTATION */
    }

  if( VRField == VR::UN )
    {
    // backtrack ...
    is.seekg(-2, std::ios::cur);
    }
  // Read Value Length
  if( VR::GetLength(VRField) == 4 && VRField != VR::UN )
    {
    if( !ValueLengthField.Read<TSwap>(is) )
      {
      assert(0 && "Should not happen");
      return is;
      }
    }
  else
    {
    // 16bits only
    if( !ValueLengthField.template Read16<TSwap>(is) )
      {
      assert(0 && "Should not happen");
      return is;
      }
    }
  return is;
}

template <typename TSwap>
std::istream &UNExplicitDataElement::ReadValue(std::istream &is, bool readvalues)
{
  if( is.eof() ) return is;
  if( ValueLengthField == 0 )
    {
    // Simple fast path
    ValueField = 0;
    return is;
    }

  //std::cerr << "exp cur tag=" << TagField << " VR=" << VRField << " VL=" << ValueLengthField << std::endl;
  // Read the Value
  //assert( ValueField == 0 );
  if( VRField == VR::SQ )
    {
    // Check wether or not this is an undefined length sequence
    assert( TagField != Tag(0x7fe0,0x0010) );
    ValueField = new SequenceOfItems;
    }
  else if( ValueLengthField.IsUndefined() )
    {
    if( VRField == VR::UN )
      {
      // Support cp246 conforming file:
      // Enhanced_MR_Image_Storage_PixelSpacingNotIn_0028_0030.dcm (illegal)
      // vs
      // undefined_length_un_vr.dcm
      assert( TagField != Tag(0x7fe0,0x0010) );
      ValueField = new SequenceOfItems;
      ValueField->SetLength(ValueLengthField); // perform realloc
      try
        {
        //if( !ValueIO<UNExplicitDataElement,TSwap>::Read(is,*ValueField) ) // non cp246
        if( !ValueIO<ImplicitDataElement,TSwap>::Read(is,*ValueField,readvalues) ) // cp246 compliant
          {
          assert(0);
          }
        }
      catch( std::exception &)
        {
        // Must be one of those non-cp246 file...
        // but for some reason seekg back to previous offset + Read
        // as UNExplicit does not work...
        throw Exception( "CP 246" );
        }
      return is;
      }
    else
      {
      // Ok this is Pixel Data fragmented...
      assert( TagField == Tag(0x7fe0,0x0010) );
      assert( VRField & VR::OB_OW );
      ValueField = new SequenceOfFragments;
      }
    }
  else
    {
    //assert( TagField != Tag(0x7fe0,0x0010) );
    ValueField = new ByteValue;
    }
  // We have the length we should be able to read the value
  ValueField->SetLength(ValueLengthField); // perform realloc


  if( TagField == Tag(0x2001,0xe05f)
    || TagField == Tag(0x2001,0xe100)
    || TagField == Tag(0x2005,0xe080)
    || TagField == Tag(0x2005,0xe083)
    || TagField == Tag(0x2005,0xe084)
    || TagField == Tag(0x2005,0xe402)
    //TagField.IsPrivate() && VRField == VR::SQ
    //-> Does not work for 0029
    //we really need to read item marker
  )
    {
    assert(0); // Could we possibly be so unlucky to have this mixture of bugs...
    }

  if( !ValueIO<UNExplicitDataElement,TSwap>::Read(is,*ValueField,readvalues) )
    {
    ParseException pe;
    pe.SetLastElement( *this );
    throw pe;
    return is;
    }

  return is;
}

template <typename TSwap>
std::istream &UNExplicitDataElement::ReadWithLength(std::istream &is, VL & length)
{
  return Read<TSwap>(is); (void)length;
}


} // end namespace gdcm

#endif // GDCMUNEXPLICITDATAELEMENT_TXX