[gdal-dev] Error in GDALWarp to NWT_GRD

[Even Rouault]

Le jeudi 14 juillet 2016 13:07:42, jramm a écrit :
> I added the following to the end of the Create method in
> frmts/northwood/grddataset.cpp:
> 
> 
>     vsi_l_offset nFileSize = 1024 + nXSize * nYSize * 2;

--> beware of the potential int32 overflow in nXSize * nYSize

>     if (VSIFTruncateL(poDS->fp, nFileSize) != 0) {
> 		CPLError(CE_Failure, CPLE_FileIO,
> 				"Failed to allocate space for GRD file");
> 		delete poDS;
> 		return NULL;
>     }
>     poDS->FlushCache(); // Write the header to disk.
> 
> Unfortunately still receiving the error. I wonder if it would be better if
> I explicitly write the zeros with VSIFWriteL?

No, that's what VSIFTruncateL() is supposed to do, in a smarter way depending 
on filesystem capabilities.

> 
> 
> 
> 
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