Use serialization table to replace repeated code with loop.

src/grid.c

@@ -2769,6 +2769,10 @@ static void gridComplete(grid_t *grid)
 
 }
 
+#define GRID_STR_SERIALIZE(gridP) { gridP->xname, gridP->yname, \
+    gridP->xlongname, gridP->ylongname, \
+    gridP->xunits, gridP->yunits }
+
 int gridGenerate(const grid_t *grid)
 {
   int gridID = gridCreate(grid->type, grid->size);
@@ -2824,18 +2828,11 @@ int gridGenerate(const grid_t *grid)
   gridptr->ni = grid->ni;
   gridptr->ni2 = grid->ni2;
   gridptr->ni3 = grid->ni3;
-  if ( grid->xname[0] )
-    memcpy(gridptr->xname, grid->xname, CDI_MAX_NAME);
-  if ( grid->yname[0] )
-    memcpy(gridptr->yname, grid->yname, CDI_MAX_NAME);
-  if ( grid->xlongname[0] )
-    memcpy(gridptr->xlongname, grid->xlongname, CDI_MAX_NAME);
-  if ( grid->ylongname[0] )
-    memcpy(gridptr->ylongname, grid->ylongname, CDI_MAX_NAME);
-  if ( grid->xunits[0] )
-    memcpy(gridptr->xunits, grid->xunits, CDI_MAX_NAME);
-  if ( grid->yunits[0] )
-    memcpy(gridptr->yunits, grid->yunits, CDI_MAX_NAME);
+  const char *grid_str_tab[] = GRID_STR_SERIALIZE(grid);
+  char *gridptr_str_tab[] = GRID_STR_SERIALIZE(gridptr);
+  for (size_t i = 0; i < sizeof (grid_str_tab) / sizeof (grid_str_tab[0]); ++i)
+    if ( grid_str_tab[i][0] )
+      memcpy(gridptr_str_tab[i], grid_str_tab[i], CDI_MAX_NAME);
   gridComplete(gridptr);
   return (gridID);
 }