Hi Hudia
[cc to grass5]
many thanks for implementing the reclass-check!
On Sun, Feb 18, 2001 at 02:42:03AM +0900, Huidae Cho wrote:
From: Markus Neteler <neteler@geog.uni-hannover.de>
> On Thu, Feb 15, 2001 at 11:37:29PM +0900, Huidae Cho wrote:
> > From: Markus Neteler <neteler@geog.uni-hannover.de>
> > >
> > > Hi Huidae,
> > >
> > > hope you got the sockets compiled now! Thanks for all your
> > > work on the d.what.* modules.
> > >
> > Hi Markus,
> >
> > Yeah! It's great! Socket driver now works well. it's fast and nice
>
> Superb!
>
> > > If you don't mind, I have another thing: g.remove and reclassed maps
> > > interact in a somewhat dangerous way. You could remove the base
> > > map for a reclassed map without being notified. Then your reclassed map
> > > become unusable of course.
> > > It would be very good to have a check added to g.remove and g.rename
> > > which tests if the map is "parent" to a reclassed map. Then the
> > > user should be asked if the map should be really deleted/renamed.
> > >
> > > To be honest: I am unable to program that. Perhaps you could
> > > look into this?
> > >
> >
> > OK, BTW: how can i know if map is reclassed or not?
> > Anyway, i'll look into it.
> You can use:
>
> if (G_is_reclass (old_name, G_mapset(), rname, rmapset) > 0)
> {
> sprintf(buf, "%s is a reclass of another map. Exiting.\n Use r.mapcalc to
> generate a copy of input map %s to work with", old_name, old_name);
> G_fatal_error(buf);
> }
>
> See:
> src/raster/r.reclass/cmd/main.c
>
> for an example.
>Hi Markus,
I've added G_is_reclassed_by() function to get child reclass maps list and
cell_misc/reclassed_by file to store this list. Without this file,
we should search all the maps' cellhd in the current location to get list
(yes, all MAPSETS) and it may take long time even if it has only one mapset.So i decided to create this new file.
This is a good idea.
affected modules are:
g.remove just prints warning if any child maps exist.
g.rename do rename specified parent and search all
child maps to change parent's name
g.copy remove "reclassed_by" file after copying all files
because new file is not reclassed by anythingCould you test this new features?
I have tested and everything works o.k. Even a great idea within
g.rename.
I have updated the programmer's manual accordingly.
Thanks for this important improvement.
Markus
PS: Eric Miller's sockets functions are added to progmangrass50.pdf as
well. Thanks to Eric for writing this part of manual.
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