[mapserver-users] phpmapscript whichShapes return code ? (second try)

[Oliver Christen]

Hi

I just had the same "problem" with python mapscript (python 2.5.2) on 
mapserver 5.4.2 as my post from 2 years ago

can someone tell me what the return code "2" means for whichShapes ?

I looked at Mapserver and Mapscript source code (I dont know C so I just 
followed the logical calls)

whichShapes calls for msLayerWhichShapes or return MS_FAILURE
*msLayerWhichShapes calls for msInitializeVirtualTable and LayerWhichShapes
**msInitializeVirtualTable calls for destroyVirtualTable, 
createVirtualTable, and (in my case) msShapeFileLayerInitializeVirtualTable 
or returns MS_FAILURE
***destroyVirtualTable returns MS_SUCCESS
***createVirtualTable calls for populateVirtualTable or returns MS_FAILURE
****populateVirtualTable return only MS_SUCCESS
***msShapeFileLayerInitializeVirtualTable return only MS_SUCCESS
**LayerWhichShapes is msShapeFileLayerWhichShapes in my case
***msShapeFileLayerWhichShapes calls for msShapefileWhichShapes or returns 
MS_FAILURE
****msShapefileWhichShapes returns MS_DONE, MS_FAILURE or MS_SUCCESS

if I do :
print mapscript.MS_DONE
I get 2 so here is my culprit

so,
1) the documentation in incomplet, mapscript whichshapes can return 
MS_SUCCESS, MS_FAILURE or MS_DONE
2) what the hell is MS_DONE ?

the code is in mapshape.c in function msShapefileWhichShapes :

  /* rect and shapefile DON'T overlap... */
  if(msRectOverlap(&shpfile->bounds, &rect) != MS_TRUE)
    return(MS_DONE);

does that means the requested rect is completly outside of the shapefile 
bbox ?

anyone can confirm that ?

thanks in advance
Oliver

----- Original Message ----- 
From: "Oliver Christen" <oliver.christen at camptocamp.com>
To: <mapserver-users at lists.osgeo.org>
Sent: Tuesday, September 09, 2008 8:36 AM
Subject: [mapserver-users] Re: phpmapscript whichShapes return code ?


> Hi
>
> using mapserver 5.0.2/php 5.2.5
>
> im doing something like this:
>
>       $map = ms_newmapobj("d:/msapps/gmap-ms40/htdocs/gmap75.map");
>       $layer = $map->getLayerByName('road');
>       $status = $layer->open();
>       $status = $layer->whichShapes($map->extent);
>       while ($shape = $layer->nextShape())
>       {
>          echo $shape->index ."<br>\n";
>       }
>       $layer->close();
>
> when checking the $status value of the $layer->whichShapes($map->extent); 
> instructions I get the values 0 or 2.
> 0 seems to be equal to MS_SUCCESS
> but 2 is definitively not equal to MS_FAILURE
>
> I did that:
>
> if ($status === MS_SUCCESS) {
>    print "success"; // 0
> }  else if ($status === MS_FAILURE) {
>    print "failure";  // 1?
> } else {
>    print "unknown"; // 2
> }
>
> I never get "failure", I only get "success" or "unknown"
>
> so, what is the meaning of a code 2 value?
>
> thanks in advance
> Oliver
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