About GDAL VRT format bug

[liminlu0314]

I create a VRT file (named Test.vrt) using gdaltest.cpp, but the opened image is wrong. The ImageOffset of the second band is 11659482, while the true value should be 11659458.

In the AddBand function in the vrtdataset.cpp file,the code around line 907 is as below:

/* -------------------------------------------------------------------- */
/*      Collect required information.                                   */
/* -------------------------------------------------------------------- */
        vsi_l_offset nImageOffset = 0;
        if( CSLFetchNameValue(papszOptions, "ImageOffset") != NULL )
            nImageOffset = CPLScanUIntBig(
                CSLFetchNameValue(papszOptions, "ImageOffset"), 20);

In the CPLScanUIntBig function, the size of ImageOffset is set to be 20, which should be changed into 22 to make it right.

Test.vrt and gdaltest.cpp can be found in attatchment. Another attatchment is tm.mdd, which is a Raw file, and can be replaced with any Raw file. debuginfo.png is a debug info.

[liminlu0314]

c++ code file

[Even Rouault]

Fixed a bit differently:

trunk r32755, branches/2.0 r32756, branches/1.11 r32757 "VRT raw: don't truncate last figure of ImageOffset if there are left space padding (#6290)"