[Kst] [Bug 224814] New: External getdata library for dirfile datasource not working correctly

[Andrew Walker]

https://bugs.kde.org/show_bug.cgi?id=224814

           Summary: External getdata library for dirfile datasource not
                    working correctly
           Product: kst
           Version: 1.8.0
          Platform: Compiled Sources
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: kst at kde.org
        ReportedBy: arwalker at sumusltd.com


Version:           1.8.0 (using KDE 4.3.4)
OS:                Linux
Installed from:    Compiled From Sources

PROBLEM:

The dirfile datasource will use, if present, the getdata library.
If not present the dirfile datasource will fall back to an internal
implementation of the getdata functionality.
However, the results of the two (for at least 's', UINT16, data types) is
inconsistent.

STEPS TO REPRODUCE:

Build kst with the getdata library (at least 0.4.2) installed and plot 's' type
data with values increasing from 0 to 65535 (expressed in terms of unsigned
values).

Build kst without the getdata library installed and plot 's' type data with
values increasing from 0 to 65535 (expressed in terms of unsigned values).

EXPECTED RESULTS:

The two plots should be identical.

ACTUAL RESULTS:

The two plots are different. For the external version of getdata the values
increase from 0 to 65535, while for the internal version they show the expected
jump to negative values.

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