[GRASS-dev] Re: [GRASS-user] r.mfilter.fp seg fault

Michael Barton michael.barton at asu.edu
Thu Mar 12 12:43:45 EDT 2009

On Mar 12, 2009, at 3:45 AM, Glynn Clements wrote:

> Michael Barton wrote:
>>>> I have been investigating the r.mfilter.fp function with a  
>>>> relatively
>>>> large raster file. My poor 6.3.0 version (on a x64bits - Poseidon
>>>> (ubuntu) distribution) of this binary keeps sending me a deadly
>>>> "segmentation fault".
>>>> I would like to know if this is a known issue? If yes any
>>>> suggestion on
>>>> how to solve it?
>>> I can't find any record of any bugs being fixed in r.mfilter.fp  
>>> since
>>> it was created, so it doesn't look like a known issue.
>>> Can you provide a recipe to reproduce this using only the sample
>>> datasets or generated data?
>>> -- 
>>> Glynn Clements <glynn at gclements.plus.com>
>> Glynn, others,
>> Assuming that this report turns out to be not a problem, is there any
>> reason not to simply replace r.mfilter with r.mfilter.fp?
> Only the fact that it's not 100% backwards compatible, although I have
> no idea whether anyone will actually want the old behaviour.
> Apart from the use of integers, r.mfilter reads nulls as zero, while
> r.mfilter.fp reads nulls as null and propagates them (i.e. the result
> cell will be null if any cell in the moving window is null).
> -- 
> Glynn Clements <glynn at gclements.plus.com>

Following up on this, are the rest of the group willing to replace the  
old r.mfilter code with code from the new r.mfilter.fp?


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