[GRASS5] problem with G_get_null_value_row &/or mapset searches in my own program

[Scott W Mitchell]

cflow sounds like a good tool to know about, thanks.  I hadn't got to 
checking whether or not those functions were even called.

My guess is that I've abused a pointer somewhere, or am somehow else 
tramping on memory, leading to a misleading error.

I'll have to comb through my assignments looking for mistakes.

Thanks...

Scott

On Saturday, May 3, 2003, at 04:29 Canada/Eastern, Roger Bivand wrote:

> On Sat, 3 May 2003, Glynn Clements wrote:
>
>>
>> Scott W Mitchell wrote:
>>
>>
>>> I've compared my program to others in the source tree, and as far as 
>>> I
>>> can see I am using it identically.  So I got it into a debugger and
>>> found that the core dump is actually happening "further in", when
>>> G_get_cell_hd calls G_is_reclass ...
>>
>> I don't see how G_get_null_value_row() can end up calling
>> G_get_cellhd().
>
> As far as I can see using cflow (an old but trusted utility for 
> printing a
> graph of a function's call hierarchy) G_get_null_value_row() does not 
> call
> G_get_cellhd(), nor do any of the functions called by it all the way
> through its call hierarchy.
>
> Although this isn't relevant here, Markus did ask me to remind him 
> about
> cflow, which, since it comes from the same era as much of the code (at
> least in libes/gis), does show what is calling what, or what is called 
> by
> what if inverted.
>
> Roger
>
> -- 
> Roger Bivand
> Economic Geography Section, Department of Economics, Norwegian School 
> of
> Economics and Business Administration, Breiviksveien 40, N-5045 Bergen,
> Norway. voice: +47 55 95 93 55; fax +47 55 95 93 93
> e-mail: Roger.Bivand at nhh.no
>
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------
Scott W. Mitchell						smitch at geog.utoronto.ca
Department of Geography					Phone: (613) 730-5375
University of Toronto at Mississauga	UTM fax: (905) 828-5273
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