[svn-r1380] Two new examples h5_mount.c and h5_reference.c were added.

h5_select.c was modified to use fill values, and h5_group.c was modified
to show how H5Giterate can be used to get information about the objects in
a group.

Necessary changes were done to the Makefile.in.

Tested on Solaris 2.6 (baldric)

1 files changed, 146 insertions, 0 deletions

diff --git a/examples/h5_reference.c b/examples/h5_reference.c
new file mode 100644
index 0000000..a69afe2
--- /dev/null
+++ b/examples/h5_reference.c
@@ -0,0 +1,146 @@
+ /* 
+  *       This program illustrates how references to the objects can be used.
+  *       Program creates two datasets in the file. It also creates the third
+  *       dataset, and references to the first two datasets are stored in it.
+  *       Program reopens the file and reads dataset with the references.
+  *       References are used to open first two datasets and read datatspace
+  *       and datatype information about them. 
+  *         
+ */
+
+#include<hdf5.h>
+
+#define FILE "refere.h5"
+
+int
+main(void) {
+   hid_t fid;                         /* File, datasets, datatypes and    */
+   hid_t did_a, sid_a;                /* dataspaces identifiers for three */ 
+   hid_t did_b, tid_b, sid_b;         /* datasets.                        */ 
+   hid_t did_r, tid_r, sid_r;
+   herr_t status;
+
+   hobj_ref_t *wbuf; /* buffer to write to disk */
+   hobj_ref_t *rbuf; /* buffer to read from disk */
+ 
+
+   hsize_t dim_r[1]; 
+   hsize_t dim_a[1];
+   hsize_t dim_b[2];
+
+   herr_t ret; /* return values */
+   
+   /* 
+    *  Create a file using default properties.
+    */
+   fid = H5Fcreate(FILE, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
+
+   /* 
+    *  Create  dataset "A" in the file.
+    */
+   dim_a[0] = 5;
+   sid_a = H5Screate_simple(1, dim_a, NULL);
+   did_a = H5Dcreate(fid, "A", H5T_NATIVE_INT, sid_a, H5P_DEFAULT);
+   
+  /* 
+   *  Create dataset "B" in the file.
+   */
+   dim_b[0] = 2;
+   dim_b[1] = 6;
+   sid_b = H5Screate_simple(2, dim_b, NULL);  
+   did_b = H5Dcreate(fid, "B", H5T_NATIVE_FLOAT, sid_b, H5P_DEFAULT);
+   
+   /* 
+    *  Create dataset "R" to store references to the datasets "A" and "B".
+    */
+   dim_r[0] = 2;
+   sid_r = H5Screate_simple(1, dim_r, NULL);
+   tid_r = H5Tcopy(H5T_STD_REF_OBJ);
+   did_r = H5Dcreate(fid, "R", tid_r, sid_r, H5P_DEFAULT );
+
+   /* 
+    *  Allocate write and read buffers.
+    */
+   wbuf = malloc(sizeof(hobj_ref_t)*2);
+   rbuf = malloc(sizeof(hobj_ref_t)*2);
+  
+   /*
+    *  Create references to the datasets "A" and "B"
+    *  and store them in the wbuf.
+    */
+   H5Rcreate(&wbuf[0], fid, "A", H5R_OBJECT, -1); 
+   H5Rcreate(&wbuf[1], fid, "B", H5R_OBJECT, -1);
+ 
+   /* 
+    *  Write dataset R using default transfer properties.
+    */
+   status = H5Dwrite(did_r, H5T_STD_REF_OBJ, H5S_ALL, H5S_ALL,
+		     H5P_DEFAULT, wbuf);
+
+   /* 
+    *  Close all objects. 
+    */
+   H5Sclose(sid_a);
+   H5Dclose(did_a);
+   
+   H5Sclose(sid_b);
+   H5Dclose(did_b);
+
+   H5Tclose(tid_r);
+   H5Sclose(sid_r);
+   H5Dclose(did_r);
+   
+   H5Fclose(fid);
+   
+   /* 
+    * Reopen the file.
+    */
+   fid = H5Fopen(FILE, H5F_ACC_RDWR, H5P_DEFAULT);
+
+   /* 
+    *  Open and read dataset "R".
+    */
+   did_r = H5Dopen(fid, "R");
+   status = H5Dread(did_r, H5T_STD_REF_OBJ, H5S_ALL, H5S_ALL,
+		    H5P_DEFAULT, rbuf);
+
+   /* 
+    *  Open dataset A using reference to it.
+    */
+   did_a = H5Rdereference(did_r, H5R_OBJECT, &rbuf[0]);
+
+   /* 
+    *  Get rank of the dataset "A"
+    */
+
+   printf("\n");
+   sid_a = H5Dget_space(did_a);
+   ret = H5Sget_simple_extent_ndims(sid_a);
+   
+   if(ret == 1) printf("Rank of A is %d.\n", ret);
+   printf("\n");
+
+   /* 
+    *  Get datatype of the dataset "B"
+    */
+   did_b = H5Rdereference(did_r, H5R_OBJECT, &rbuf[1]);
+   tid_b = H5Dget_type(did_b);
+   if(H5Tequal(tid_b, H5T_NATIVE_FLOAT))
+     printf("Datatype of B is H5T_NATIVE_FLOAT.\n");
+   printf("\n");
+
+   /* 
+    * Close all objects.
+    */
+   H5Dclose(did_a);
+   H5Sclose(sid_a);
+   H5Dclose(did_b);
+   H5Tclose(tid_b);
+   H5Fclose(fid);
+
+   return 0;
+
+ }
+
+
+