[vtkusers] wx/vtk weirdness

[Bill Lorensen]

Mathieu,

There are many vtk readers that use sscanf to read floating point
numbers. Does that mean that these readers may also misinterpret
floating point if LC_NUMERIC is different.

Bill

On Fri, Nov 27, 2009 at 11:25 AM, Mathieu Malaterre
<mathieu.malaterre at gmail.com> wrote:
> On Fri, Nov 27, 2009 at 5:17 PM, "Eduardo M. Suárez Santana"
> <esuarez at itccanarias.org> wrote:
>> Mathieu Malaterre wrote:
>>> On Fri, Nov 27, 2009 at 4:47 PM, "Eduardo M. Suárez Santana"
>>> <esuarez at itccanarias.org> wrote:
>>>
>>>> This looks weird to me. Spacing of vtkDICOMImageReader depends on
>>>> whether I use wx or not.
>>>>
>>>> Can anyone reproduce?
>>>>
>>>> It fails in vtk-5.2.1 and vtk-5.4.2 on linux, python-2.6.2 and wxpython-2.8.10.1
>>>>
>>>
>>> DICOMParser is using internally sscanf to decode the spacing. It will
>>> fails to work when LC_NUMERIC is not compatible with "C" style. I
>>> believe by default GTK (underlying implementation of wx on linux) sets
>>> the LC_NUMERIC corresponding to your locales.
>>>
>>> HTH
>>>
>> Rethinking.
>>
>> Is not a bug if the correct behaviour depends on setting an unrelated
>> variable (DICOM - LC_NUMERIC)?
>>
>
> I /personally/ believe it is. This is up to the DICOM implementor to
> make sure the reading/writing of floating point value works as per
> DICOM specs (ie. use '.' and not ',').
> Maybe log a bug for that.
>
> 2cts
> --
> Mathieu
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