[Octave-bug-tracker] [bug #45225] HDF5 I/O broken for int32 variables

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?45225>

                 Summary: HDF5 I/O broken for int32 variables
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Mo 01 Jun 2015 10:45:32 UTC
                Category: Interpreter
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: Markus Grabner
        Originator Email: address@hidden
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.0.0-rc4
        Operating System: Microsoft Windows

    _______________________________________________________

Details:

Writing/reading integer variables to/from HDF5 files worked in octave-3.8.2,
but is broken in octave-4.0.0 (tested with the final release and not rc4, but
4.0.0 is not yet in the bug report combo box). The issue appears both under
Linux and Windows.

This is demonstrated by the attached scripts. Running one in octave-3.8 and
the other one in octave-4.0 gives incorrect results:

[octave-3.8]
>> test_hdf5_save
x = 123456789

[octave-4.0]
>> test_hdf5_load
x = 255

The other way round is also incorrect:

[octave-4.0]
>> test_hdf5_save
x = 123456789

[octave-3.8]
>> test_hdf5_load
x = 21

(note that 123456789 == 0x75BCD15, and that its last two hex digits 0x15 ==
21, which is the value read by octave-3.8)

Only when both scripts are run in octave-3.8, we get correct results:

[octave-3.8]
>> test_hdf5_save
x = 123456789
>> test_hdf5_load
x = 123456789

The HDF viewer provided by the HDF group
(https://www.hdfgroup.org/products/java/hdfview) confirms that the values read
and written by octave-3.8 are correct in the above example.



    _______________________________________________________

File Attachments:


-------------------------------------------------------
Date: Mo 01 Jun 2015 10:45:32 UTC  Name: test_hdf5_save.m  Size: 61B   By:
None
scripts to demonstrate broken HDF5 I/O for integer variables in octave-4.0.0
<http://savannah.gnu.org/bugs/download.php?file_id=34137>
-------------------------------------------------------
Date: Mo 01 Jun 2015 10:45:32 UTC  Name: test_hdf5_load.m  Size: 36B   By:
None
scripts to demonstrate broken HDF5 I/O for integer variables in octave-4.0.0
<http://savannah.gnu.org/bugs/download.php?file_id=34138>

    _______________________________________________________

Reply to this item at:

  <http://savannah.gnu.org/bugs/?45225>

_______________________________________________
  Nachricht gesendet von/durch Savannah
  http://savannah.gnu.org/