4 files changed, 56 insertions, 4 deletions
diff --git a/tools/h5repack/h5repack.h b/tools/h5repack/h5repack.h
index b91d516..ef6dca6 100644
--- a/tools/h5repack/h5repack.h
+++ b/tools/h5repack/h5repack.h
@@ -293,10 +293,12 @@ void write_attr_in(hid_t loc_id,
                    const char* dset_name, /* for saving reference to dataset*/
                    hid_t fid, /* for reference create */
                    int make_diffs /* flag to modify data buffers */);
+void write_null_attr(hid_t loc_id); 
 void write_dset_in(hid_t loc_id, 
                    const char* dset_name, /* for saving reference to dataset*/
                    hid_t file_id,
                    int make_diffs /* flag to modify data buffers */);
+void write_null_dset(hid_t loc_id);
 
 int make_filters(hid_t loc_id);
 int make_layout(hid_t loc_id);
diff --git a/tools/h5repack/testh5repack_attr.c b/tools/h5repack/testh5repack_attr.c
index a1dad92..135d15b 100644
--- a/tools/h5repack/testh5repack_attr.c
+++ b/tools/h5repack/testh5repack_attr.c
@@ -1028,5 +1028,30 @@ etc
  make_attr(loc_id,3,dims3,"float3D",H5T_NATIVE_FLOAT,buf83);
 }
 
-
-
+/*-------------------------------------------------------------------------
+ * Function: write_null_attr
+ *
+ * Purpose: write null attribute in LOC_ID (dataset, group, named datatype) 
+ *
+ * Programmer: Raymond Lu, slu@ncsa.uiuc.edu
+ *
+ * Date: May 24, 2004
+ *
+ *-------------------------------------------------------------------------
+ */
+void write_null_attr(hid_t loc_id)
+{
+     hid_t sid, attr_id;
+     int        val = 2;
+    
+     /* Create the null attribute */
+     sid = H5Screate(H5S_NULL);
+     attr_id = H5Acreate(loc_id, "null_attr", H5T_NATIVE_INT, sid, H5P_DEFAULT);
+  
+     /* Not supposed to write anything */
+     H5Awrite(attr_id, H5T_NATIVE_INT, &val);
+
+     /* Close */
+     H5Aclose(attr_id);
+     H5Sclose(sid);
+}
diff --git a/tools/h5repack/testh5repack_dset.c b/tools/h5repack/testh5repack_dset.c
index 57a5b27..7f6345b 100644
--- a/tools/h5repack/testh5repack_dset.c
+++ b/tools/h5repack/testh5repack_dset.c
@@ -617,7 +617,31 @@ void write_dset_in(hid_t loc_id,
  write_dset(loc_id,3,dims3,"float3D",H5T_NATIVE_FLOAT,buf83);
 }
 
-
+/*-------------------------------------------------------------------------
+ * Function: write_null_dset
+ *
+ * Purpose: write null dataset in LOC_ID 
+ *
+ * Programmer: Raymond Lu, slu@ncsa.uiuc.edu
+ *
+ * Date: May 24, 2004
+ *
+ *-------------------------------------------------------------------------
+ */
+void write_null_dset(hid_t loc_id)
+{
+     hid_t sid, dset_id;
+     int        val = 2;
+    
+     /* Create the null dataset */
+     sid = H5Screate(H5S_NULL);
+     dset_id  = H5Dcreate(loc_id,"null_dset",H5T_NATIVE_INT,sid,H5P_DEFAULT);
+     H5Dwrite(dset_id,H5T_NATIVE_INT,H5S_ALL,H5S_ALL,H5P_DEFAULT,&val);
+
+     /* Close */
+     H5Dclose(dset_id);
+     H5Sclose(sid);
+}
 
 /*-------------------------------------------------------------------------
  * Function: make_dset_reg_ref
diff --git a/tools/h5repack/testh5repack_make.c b/tools/h5repack/testh5repack_make.c
index c69abd9..2ab1e00 100644
--- a/tools/h5repack/testh5repack_make.c
+++ b/tools/h5repack/testh5repack_make.c
@@ -164,7 +164,7 @@ int make_all_objects(hid_t loc_id)
 
  write_dset_in(root_id,"dset_referenced",loc_id,0);
  write_dset_in(group_id,"dset_referenced",loc_id,0);
-
+ write_null_dset(root_id);
 
  /* Close */
  H5Dclose(dset_id);
@@ -216,6 +216,7 @@ int make_attributes(hid_t loc_id)
  write_attr_in(dset_id,"dset",loc_id,0);
  write_attr_in(group_id,"dset",loc_id,0);
  write_attr_in(root_id,"dset",loc_id,0);
+ write_null_attr(root_id);
 
  /* Close */
  H5Dclose(dset_id);