[gdal-dev] Under what (if any) conditions would GDALWriteBlock modify data buffer?

[Laurențiu Nicola]

I don't think it does, but some parts (the older ones) of the public GDAL API don't use const. I admit I didn't check the implementation this time though.

Laurentiu

On Mon, Dec 18, 2023, at 00:09, Fitch, Simeon via gdal-dev wrote:
> The last argument to function `CPLErr GDALWriteBlock(GDALRasterBandH, int, int, void*)`, pointing to the block array, is not `const`.  I can't find anything in the documentation discussing ownership, etc. but need to know what kind of invariants can be assumed here.
> 
> Are there (driver dependent?) circumstances where `GDALWriteBlock` will mutate the given array, or can callers assume it's effectively `const void*`?
> 
> Thanks,
> 
> Simeon
> 
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