Docu update.

ChangeLog

@@ -2,6 +2,10 @@
 
 	* Version 1.9.2 released
 
+2017-11-01  Uwe Schulzweida
+
+	* Check chunk size limit of 2GB
+
 2017-10-20  Uwe Schulzweida
 
 	* gridInqXinc: added support for negativ values (bug fix)

src/cdf_write.c

@@ -401,6 +401,12 @@ int cdfDefVar(stream_t *streamptr, int varID)
   if ( xid != CDI_UNDEFID ) dims[ndims++] = xid;
   */
   size_t chunk_size_max = 65536;
+  if ( chunktype != CDI_CHUNK_LINES && gridsize > INT32_MAX )
+    {
+      if ( CDI_Debug ) fprintf(stderr, "gridsize > %d, changed chunktype to CDI_CHUNK_LINES!\n", INT32_MAX);
+      chunktype = CDI_CHUNK_LINES;
+    }
+
   for ( int id = 0; id < 3; ++id )
     {
       if ( dimorder[id] == 3 && zid != CDI_UNDEFID )
@@ -424,14 +430,14 @@ int cdfDefVar(stream_t *streamptr, int varID)
           if ( chunktype == CDI_CHUNK_AUTO && yid == CDI_UNDEFID )
             chunks[ndims] = (chunk_size_max > xsize) ? xsize : chunk_size_max;
           else
-            chunks[ndims] = xsize;
+            chunks[ndims] = (xsize > INT32_MAX) ? INT32_MAX : xsize;
           dims[ndims] = xid;
           ndims++;
         }
     }
 
   if ( CDI_Debug )
-    fprintf(stderr, "chunktype %d  chunks %d %d %d %d\n", chunktype, (int)chunks[0], (int)chunks[1], (int)chunks[2], (int)chunks[3]);
+    fprintf(stderr, "chunktype %d  chunks %zu %zu %zu %zu\n", chunktype, chunks[0], chunks[1], chunks[2], chunks[3]);
 
   char varname[CDI_MAX_NAME];
   char name[CDI_MAX_NAME]; name[0] = 0;