[Dcmlib] Global::GetVR()->IsVROfBinaryRepresentable(vr)

[Jean-Pierre ROUX]

At 17:16 -0400 18/10/05, Mathieu Malaterre wrote:
>Hello,
>
>	I have some trouble understanding this piece of code, 
>gdcmDocument.cxx line 1003

Well ...
Very often, a file claimed as 'Explicit Value Representation' miss 
the VR in a few Tags to be *really* Explicit VR.

If the file is supposed to be Explicit VR (if Filetype == ExplicitVR)
  and
if, for a given Dicom Element, the 2 first bytes, following the 4 
bytes (2+2) Tag, stored in the variable vr,
don't correspond to a VR (i.e. UI, PN, ULth SL, etc),
( !IsVROfBinaryRepresentable(vr) ), then the length (of *this* 
DicomElement) is coded on 4 bytes, just as the File was implicit VR, 
not on 2 bytes as in the 'true' Explicit VR.

JP

    if ( Filetype == ExplicitVR &&
>               !Global::GetVR()->IsVROfBinaryRepresentable(vr) )
>         {
>               ////// No DataEntry: should mean UNKOWN VR
>               gdcmWarningMacro( std::hex << newDocEntry->GetGroup()
>                                 << "|" << newDocEntry->GetElement()
>                                 << " : No DataEntry."
>                                 "Probably unknown VR.");
>         }
>
>
>Comments ?
>
>Thanks,
>Mathieu
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   Jean-Pierre ROUX
   CREATIS - CNRS UMR 5515, INSERM U 630
   Laboratoire de Radiologie Experimentale
   Hopital Cardiologique
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