From 665170edf5b1346463e3e7d58bc6a4395deba45a Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Tue, 7 Aug 2018 16:16:23 +0200
Subject: Interp: allow the user to specify maximum reflevel for interpolation

---
 Carpet/CarpetInterp/src/interp.cc | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/Carpet/CarpetInterp/src/interp.cc b/Carpet/CarpetInterp/src/interp.cc
index 0e1474e21..d5283bf62 100644
--- a/Carpet/CarpetInterp/src/interp.cc
+++ b/Carpet/CarpetInterp/src/interp.cc
@@ -343,9 +343,10 @@ namespace CarpetInterp {
     vector<int> num_time_derivs;
     CCTK_REAL current_time, delta_time;
     int prolongation_order_time;
+    int table_maxrl = -1;
 
     {
-      int const iret = extract_parameter_table_options
+      int iret = extract_parameter_table_options
         (cctkGH,
          param_table_handle,
          N_interp_points, N_input_arrays, N_output_arrays,
@@ -356,6 +357,14 @@ namespace CarpetInterp {
         timer_CDI->stop (0);
         return iret;
       }
+
+      iret = Util_TableGetInt (param_table_handle,
+                               &table_maxrl, "max_reflevel");
+      if (iret == UTIL_ERROR_TABLE_NO_SUCH_KEY) {
+      } else if (iret != 1) {
+        CCTK_WARN (CCTK_WARN_ALERT, "internal error");
+        return -1;
+      }
     }
 
     // Find range of refinement levels
@@ -365,9 +374,14 @@ namespace CarpetInterp {
               arrdata.AT(coord_group).AT(m).hh->reflevels());
     }
     int const minrl = want_global_mode ? 0 : reflevel;
-    int const maxrl = want_global_mode ?
-      arrdata.AT(coord_group).AT(0).hh->reflevels() : reflevel+1;
-    //int maxrl = reflevel + 1;
+
+    int maxrl;
+    if (table_maxrl >= 0)
+        maxrl = table_maxrl;
+    else if (want_global_mode)
+        maxrl = arrdata.AT(coord_group).AT(0).hh->reflevels();
+    else
+        maxrl = reflevel+1;
 
     // Find maximum number of components over all levels and maps
     int maxncomps = 0;
-- 
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