Added global option CDI_read_cell_corners.

ChangeLog

@@ -3,6 +3,10 @@
         * using CGRIBEX library version 1.9.1
 	* Version 1.9.5 released
 
+2018-07-10  Uwe Schulzweida
+
+	* Added global option CDI_read_cell_corners
+
 2018-07-09  Uwe Schulzweida
 
 	* grib reduced_gg: gribapi gridType detector doesn't like lonIncr

src/cdi_int.c

@@ -39,6 +39,7 @@ int cdiSkipRecords          = 0;
 int cdiConvention           = CDI_CONVENTION_ECHAM;
 int cdiInventoryMode        = 1;
 int CDI_Version_Info        = 1;
+int CDI_read_cell_corners   = 1;
 int CDI_cmor_mode           = 0;
 int CDI_reduce_dim          = 0;
 size_t CDI_netcdf_hdr_pad   = 0UL;
@@ -340,6 +341,9 @@ void cdiInitialize(void)
       value = cdiGetenvInt("CDI_GRIBAPI_DEBUG");
       if ( value >= 0 ) cdiGribApiDebug = (int) value;
 
+      value = cdiGetenvInt("CDI_READ_CELL_CORNERS");
+      if ( value >= 0 ) CDI_read_cell_corners = (int) value;
+
       value = cdiGetenvInt("CDI_RECOPT");
       if ( value >= 0 ) CDI_Recopt = (int) value;
 
@@ -478,6 +482,7 @@ void cdiDefGlobal(const char *string, int val)
   else if ( strcmp(string, "SORTPARAM")        == 0 ) cdiSortParam = val;
   else if ( strcmp(string, "HAVE_MISSVAL")     == 0 ) cdiHaveMissval = val;
   else if ( strcmp(string, "NC_CHUNKSIZEHINT") == 0 ) cdiNcChunksizehint = val;
+  else if ( strcmp(string, "READ_CELL_CORNERS")== 0 ) CDI_read_cell_corners = val;
   else if ( strcmp(string, "CMOR_MODE")        == 0 ) CDI_cmor_mode = val;
   else if ( strcmp(string, "REDUCE_DIM")       == 0 ) CDI_reduce_dim = val;
   else if ( strcmp(string, "NETCDF_HDR_PAD")   == 0 ) CDI_netcdf_hdr_pad = (size_t) val;

src/cdi_int.h

@@ -346,6 +346,7 @@ extern int cdiSkipRecords;
 extern int cdiConvention;
 extern int cdiInventoryMode;
 extern int CDI_Version_Info;
+extern int CDI_read_cell_corners;
 extern int CDI_cmor_mode;
 extern int CDI_reduce_dim;
 extern size_t CDI_netcdf_hdr_pad;

src/stream_cdf_i.c

@@ -2420,7 +2420,7 @@ bool cdf_read_coordinates(struct cdfLazyGrid *restrict lazyGrid, ncvar_t *ncvar,
         grid->size  = size;
         grid->x.size = xsize;
         grid->y.size = ysize;
-        if ( xvarid != CDI_UNDEFID )
+        if ( xvarid != CDI_UNDEFID && CDI_read_cell_corners )
           {
             grid->x.flag = 1;
             int bvarid = ncvars[xvarid].bounds;
@@ -2435,7 +2435,7 @@ bool cdf_read_coordinates(struct cdfLazyGrid *restrict lazyGrid, ncvar_t *ncvar,
                   }
               }
           }
-        if ( yvarid != CDI_UNDEFID )
+        if ( yvarid != CDI_UNDEFID && CDI_read_cell_corners )
           {
             grid->y.flag = 1;
             int bvarid = ncvars[yvarid].bounds;