adds ncc to config_yaml

input/couple_config_test.yaml

@@ -91,6 +91,9 @@ coupling:
       - source_to_target_map:
           spread_distance: 5.0
           weighted: distance_weighted
+      - ncc:
+          weighted: distance_weighted
+          partial_coverage: TRUE
     field: grid_eastward_wind
   - <<: *ocn2atm
     src_grid: grid2

src/mci/config_yaml.c

@@ -373,6 +373,21 @@ DEF_INTERP_METHOD(average,
   DEF_BOOL_PARAM(
     partial_coverage, YAC_INTERP_AVG_PARTIAL_COVERAGE_DEFAULT));
 
+// interpolation method nearest corner cells
+DEF_INTERP_METHOD(ncc,
+  DEF_INTERP_STACK_ADD(ncc,
+    parameters[0].enum_value, parameters[1].bool_value),
+  enum yac_interp_ncc_weight_type weight_type;
+  DEF_INTERP_STACK_GET(ncc,
+    &weight_type, &parameter_values[1].bool_value)
+  parameter_values[0].enum_value = (int)weight_type;,
+  DEF_ENUM_PARAM(
+    weighted, YAC_INTERP_NCC_WEIGHT_TYPE_DEFAULT,
+    DEF_NAME_TYPE_PAIR(arithmetic_average, YAC_INTERP_NCC_AVG),
+    DEF_NAME_TYPE_PAIR(distance_weighted, YAC_INTERP_NCC_DIST)),
+  DEF_BOOL_PARAM(
+    partial_coverage, YAC_INTERP_NCC_PARTIAL_COVERAGE_DEFAULT));
+
 // interpolation method n-nearest neighbor
 DEF_INTERP_METHOD(nnn,
   DEF_INTERP_STACK_ADD(nnn,
@@ -563,6 +578,7 @@ struct yac_interpolation_method {
   size_t num_parameters;
 } const interpolation_methods[] =
   {ADD_INTERPOLATION(average, YAC_AVERAGE),
+   ADD_INTERPOLATION(ncc, YAC_NEAREST_CORNER_CELLS),
    ADD_INTERPOLATION(nnn, YAC_N_NEAREST_NEIGHBOR),
    ADD_INTERPOLATION(conservative, YAC_CONSERVATIVE),
    ADD_INTERPOLATION(source_to_target_map, YAC_SOURCE_TO_TARGET_MAP),

tests/mci/test_couple_config.c

@@ -316,6 +316,8 @@ static void check_couple_config(struct yac_couple_config * couple_config) {
   yac_interp_stack_config_add_spmap(
     ref_interp_stack_config[0][3], 5.0 * YAC_RAD,
     YAC_INTERP_SPMAP_MAX_SEARCH_DISTANCE_DEFAULT, YAC_INTERP_SPMAP_DIST);
+  yac_interp_stack_config_add_ncc(
+    ref_interp_stack_config[0][3], YAC_INTERP_NCC_DIST, 1);
 
   ref_interp_stack_config[0][4] = yac_interp_stack_config_new();
   yac_interp_stack_config_add_creep(