Handle empty grids.

Handle empty grids.
Fix global and level mode handling of the interpolator.

Allow local mode calls for the interpolator, reduction operator, and
hyperslabber, assuming that people know what they are doing.

darcs-hash:20030513101400-07bb3-42af7544c2ea98dbef5a7ad6d5112bea2dcc404f.gz

1 files changed, 8 insertions, 4 deletions

diff --git a/Carpet/CarpetSlab/src/slab.cc b/Carpet/CarpetSlab/src/slab.cc
index 8f1091a8d..440f27f42 100644
--- a/Carpet/CarpetSlab/src/slab.cc
+++ b/Carpet/CarpetSlab/src/slab.cc
@@ -1,4 +1,4 @@
-// $Header: /home/eschnett/C/carpet/Carpet/Carpet/CarpetSlab/src/slab.cc,v 1.5 2003/05/12 16:25:11 schnetter Exp $
+// $Header: /home/eschnett/C/carpet/Carpet/Carpet/CarpetSlab/src/slab.cc,v 1.6 2003/05/13 12:14:00 schnetter Exp $
 
 #include <assert.h>
 #include <stdlib.h>
@@ -21,7 +21,7 @@
 #include "slab.hh"
 
 extern "C" {
-  static const char* rcsid = "$Header: /home/eschnett/C/carpet/Carpet/Carpet/CarpetSlab/src/slab.cc,v 1.5 2003/05/12 16:25:11 schnetter Exp $";
+  static const char* rcsid = "$Header: /home/eschnett/C/carpet/Carpet/Carpet/CarpetSlab/src/slab.cc,v 1.6 2003/05/13 12:14:00 schnetter Exp $";
   CCTK_FILEVERSION(Carpet_CarpetSlab_slab_cc);
 }
 
@@ -53,7 +53,9 @@ namespace CarpetSlab {
     
     // Save global state
     int saved_component = component;
-    component = -1;
+    if (component!=-1) {
+      set_component (cgh, -1);
+    }
     
     // Check Cactus grid hierarchy
     assert (cgh);
@@ -235,7 +237,9 @@ namespace CarpetSlab {
     } // if components>0
     
     // Restore global state
-    component = saved_component;
+    if (saved_component!=-1) {
+      set_component (cgh, saved_component);
+    }
     
     // Success
     return hdata;