/usr/include/gdcm-2.0/gdcmSequenceOfFragments.h is in libgdcm2-dev 2.0.18-7.
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 | /*=========================================================================
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 GDCMSEQUENCEOFFRAGMENTS_H
#define GDCMSEQUENCEOFFRAGMENTS_H
#include "gdcmValue.h"
#include "gdcmVL.h"
#include "gdcmFragment.h"
#include "gdcmBasicOffsetTable.h"
namespace gdcm
{
// FIXME gdcmSequenceOfItems qnd gdcmSequenceOfFragments
// should be rethink (duplicate code)
/**
* \brief Class to represent a Sequence Of Fragments
* \todo I do not enforce that Sequence of Fragments ends with a SQ end del
*/
class GDCM_EXPORT SequenceOfFragments : public Value
{
public:
// Typdefs:
typedef std::vector<Fragment> FragmentVector;
/// \brief constructor (UndefinedLength by default)
SequenceOfFragments():Table(),SequenceLengthField(0xFFFFFFFF) { }
/// \brief Returns the SQ length, as read from disk
VL GetLength() const {
return SequenceLengthField; }
/// \brief Sets the actual SQ length
void SetLength(VL length) {
SequenceLengthField = length;
}
void Clear();
/// \brief Appends a Fragment to the already added ones
void AddFragment(Fragment const &item);
// Compute the length of all fragments (and framents only!).
// Basically the size of the PixelData as stored (in bytes).
unsigned long ComputeByteLength() const;
// Compute the length of fragments (in bytes)+ length of tag...
// to be used for computation of Group Length
VL ComputeLength() const;
// Get the buffer
bool GetBuffer(char *buffer, unsigned long length) const;
bool GetFragBuffer(unsigned int fragNb, char *buffer, unsigned long &length) const;
unsigned int GetNumberOfFragments() const;
const Fragment& GetFragment(unsigned int num) const;
// Write the buffer of each fragment (call WriteBuffer on all Fragments, which are
// ByteValue). No Table information is written.
bool WriteBuffer(std::ostream &os) const;
const BasicOffsetTable &GetTable() const { return Table; }
BasicOffsetTable &GetTable() { return Table; }
template <typename TSwap>
std::istream& Read(std::istream &is)
{
assert( SequenceLengthField.IsUndefined() );
//if( SequenceLengthField.IsUndefined() )
{
const Tag seqDelItem(0xfffe,0xe0dd);
// First item is the basic offset table:
try
{
Table.Read<TSwap>(is);
gdcmDebugMacro( "Table: " << Table );
}
catch(...)
{
// Bug_Siemens_PrivateIconNoItem.dcm
// First thing first let's rewind
is.seekg(-4, std::ios::cur);
if ( Table.GetTag() == Tag(0xd8ff,0xe0ff) )
{
Fragment frag;
is.seekg( 8340, std::ios::cur );
char dummy[8340];
frag.SetByteValue( dummy, 8340 - Table.GetLength() - 16 );
Fragments.push_back( frag );
return is;
}
else
{
throw "Catch me if you can";
//assert(0);
}
}
// not used for now...
Fragment frag;
try
{
while( frag.Read<TSwap>(is) && frag.GetTag() != seqDelItem )
{
gdcmDebugMacro( "Frag: " << frag );
Fragments.push_back( frag );
}
assert( frag.GetTag() == seqDelItem && frag.GetVL() == 0 );
}
catch(Exception &ex)
{
(void)ex; //to avoid unreferenced variable warning on release
#ifdef GDCM_SUPPORT_BROKEN_IMPLEMENTATION
// that's ok ! In all cases the whole file was read, because Fragment::Read only fail on eof() reached
// 1. SIEMENS-JPEG-CorruptFrag.dcm is more difficult to deal with, we have a partial fragment, read
// we decide to add it anyway to the stack of fragments (eof was reached so we need to clear error bit)
if( frag.GetTag() == Tag(0xfffe,0xe000) )
{
gdcmWarningMacro( "Pixel Data Fragment could be corrupted. Use file at own risk" );
Fragments.push_back( frag );
is.clear(); // clear the error bit
}
// 2. GENESIS_SIGNA-JPEG-CorruptFrag.dcm
else if ( frag.GetTag() == Tag(0xddff,0x00e0) )
{
assert( Fragments.size() == 1 );
const ByteValue *bv = Fragments[0].GetByteValue();
assert( (unsigned char)bv->GetPointer()[ bv->GetLength() - 1 ] == 0xfe );
// Yes this is an extra copy, this is a bug anyway, go fix YOUR code
Fragments[0].SetByteValue( bv->GetPointer(), bv->GetLength() - 1 );
gdcmWarningMacro( "JPEG Fragment length was declared with an extra byte at the end: stripped !" );
is.clear(); // clear the error bit
}
else
{
// 3. gdcm-JPEG-LossLess3a.dcm: easy case, an extra tag was found instead of terminator (eof is the next char)
gdcmWarningMacro( "Reading failed at Tag:" << frag.GetTag() << ". Use file at own risk." << ex.what() );
}
#else
(void)ex;
#endif /* GDCM_SUPPORT_BROKEN_IMPLEMENTATION */
}
}
return is;
}
template <typename TSwap>
std::ostream const &Write(std::ostream &os) const
{
if( !Table.Write<TSwap>(os) )
{
assert(0 && "Should not happen");
return os;
}
SequenceOfFragments::FragmentVector::const_iterator it = Fragments.begin();
for(;it != Fragments.end(); ++it)
{
it->Write<TSwap>(os);
}
// seq del item is not stored, write it !
const Tag seqDelItem(0xfffe,0xe0dd);
seqDelItem.Write<TSwap>(os);
VL zero = 0;
zero.Write<TSwap>(os);
return os;
}
//#if defined(SWIGPYTHON) || defined(SWIGCSHARP) || defined(SWIGJAVA)
// For now leave it there, this does not make sense in the C++ layer
// Create a new object
static SmartPointer<SequenceOfFragments> New()
{
return new SequenceOfFragments();
}
//#endif
protected:
public:
void Print(std::ostream &os) const {
os << "SQ L= " << SequenceLengthField << "\n";
os << "Table:" << Table << "\n";
FragmentVector::const_iterator it =
Fragments.begin();
for(;it != Fragments.end(); ++it)
{
os << " " << *it << "\n";
}
assert( SequenceLengthField.IsUndefined() );
{
const Tag seqDelItem(0xfffe,0xe0dd);
VL zero = 0;
os << seqDelItem;
os << "\t" << zero;
}
}
bool operator==(const Value &val) const
{
const SequenceOfFragments &sqf = dynamic_cast<const SequenceOfFragments&>(val);
return Table == sqf.Table &&
SequenceLengthField == sqf.SequenceLengthField &&
Fragments == sqf.Fragments;
}
private:
public:
BasicOffsetTable Table;
VL SequenceLengthField;
/// \brief Vector of Sequence Fragments
FragmentVector Fragments;
};
/**
* \example DecompressJPEGFile.cs
* This is a C# example on how to use gdcm::SequenceOfFragments
*/
} // end namespace gdcm
#endif //GDCMSEQUENCEOFFRAGMENTS_H
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