[vtk-developers] [VTK 0012819]: Wrong byte order for long (64bit) in vtkDataReader/vtkDataWriter

[Mantis Bug Tracker]

The following issue has been SUBMITTED. 
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http://vtk.org/Bug/view.php?id=12819 
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Reported By:                Tobias Maier
Assigned To:                
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Project:                    VTK
Issue ID:                   12819
Category:                   (No Category)
Reproducibility:            have not tried
Severity:                   minor
Priority:                   normal
Status:                     backlog
Project:                    TBD 
Type:                       incorrect functionality 
Resolution:                 open
Fixed in Version:           
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Date Submitted:             2011-12-21 11:24 EST
Last Modified:              2011-12-21 11:24 EST
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Summary:                    Wrong byte order for long (64bit) in
vtkDataReader/vtkDataWriter
Description: 
When a vtkLongArray is written with the vtkDataWriter on a system where
sizeof(long) = 8 the byte order is changed within a block of 8 bytes [0 1 2 3 4
5 6 7] -> [7 6 5 4 3 2 1 0]. But when the data is read back with vtkDataReader
it uses a block size of 4 for swapping the byte order for long. This results
when writing and reading (as in marshalling/unmarshalling in vtkCommunicator) in
an ordering of [4 5 6 7 0 1 2 3].
I do not know if the behaviour of the reader or writer is correct and if an
exchange between systems with 32bit and 64bit is even possible.
The attached file is an example that should reproduce the explained bug on 64bit
systems.
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Issue History 
Date Modified    Username       Field                    Change               
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2011-12-21 11:24 Tobias Maier   New Issue                                    
2011-12-21 11:24 Tobias Maier   File Added: vtkWriterReaderBug.cxx              
     
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