1 files changed, 128 insertions, 0 deletions
diff --git a/HDF5Examples/C/H5G/h5ex_g_phase.c b/HDF5Examples/C/H5G/h5ex_g_phase.c
new file mode 100644
index 0000000..b87c0a4
--- /dev/null
+++ b/HDF5Examples/C/H5G/h5ex_g_phase.c
@@ -0,0 +1,128 @@
+/************************************************************
+
+  This example shows how to set the conditions for
+  conversion between compact and dense (indexed) groups.
+
+  This file is intended for use with HDF5 Library version 1.8
+
+ ************************************************************/
+
+#include "hdf5.h"
+#include <stdio.h>
+
+#define FILE        "h5ex_g_phase.h5"
+#define MAX_GROUPS  7
+#define MAX_COMPACT 5
+#define MIN_DENSE   3
+
+int
+main(void)
+{
+    hid_t      file, group, subgroup, fapl, gcpl; /* Handles */
+    herr_t     status;
+    H5G_info_t ginfo;
+    char       name[3] = "G0"; /* Name of subgroup */
+    unsigned   i;
+
+    /*
+     * Set file access property list to allow the latest file format.
+     * This will allow the library to create new format groups.
+     */
+    fapl   = H5Pcreate(H5P_FILE_ACCESS);
+    status = H5Pset_libver_bounds(fapl, H5F_LIBVER_LATEST, H5F_LIBVER_LATEST);
+
+    /*
+     * Create group access property list and set the phase change
+     * conditions.  In this example we lowered the conversion threshold
+     * to simplify the output, though this may not be optimal.
+     */
+    gcpl   = H5Pcreate(H5P_GROUP_CREATE);
+    status = H5Pset_link_phase_change(gcpl, MAX_COMPACT, MIN_DENSE);
+
+    /*
+     * Create a new file using the default properties.
+     */
+    file = H5Fcreate(FILE, H5F_ACC_TRUNC, H5P_DEFAULT, fapl);
+
+    /*
+     * Create primary group.
+     */
+    group = H5Gcreate(file, name, H5P_DEFAULT, gcpl, H5P_DEFAULT);
+
+    /*
+     * Add subgroups to "group" one at a time, print the storage type
+     * for "group" after each subgroup is created.
+     */
+    for (i = 1; i <= MAX_GROUPS; i++) {
+
+        /*
+         * Define the subgroup name and create the subgroup.
+         */
+        name[1]  = ((char)i) + '0'; /* G1, G2, G3 etc. */
+        subgroup = H5Gcreate(group, name, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
+        status   = H5Gclose(subgroup);
+
+        /*
+         * Obtain the group info and print the group storage type
+         */
+        status = H5Gget_info(group, &ginfo);
+        printf("%d Group%s: Storage type is ", (int)ginfo.nlinks, ginfo.nlinks == 1 ? " " : "s");
+        switch (ginfo.storage_type) {
+            case H5G_STORAGE_TYPE_COMPACT:
+                printf("H5G_STORAGE_TYPE_COMPACT\n"); /* New compact format */
+                break;
+            case H5G_STORAGE_TYPE_DENSE:
+                printf("H5G_STORAGE_TYPE_DENSE\n"); /* New dense (indexed) format */
+                break;
+            case H5G_STORAGE_TYPE_SYMBOL_TABLE:
+                printf("H5G_STORAGE_TYPE_SYMBOL_TABLE\n"); /* Original format */
+                break;
+            case H5G_STORAGE_TYPE_UNKNOWN:
+                printf("H5G_STORAGE_TYPE_UNKNOWN\n"); /* Unknown format */
+        }
+    }
+
+    printf("\n");
+
+    /*
+     * Delete subgroups one at a time, print the storage type for
+     * "group" after each subgroup is deleted.
+     */
+    for (i = MAX_GROUPS; i >= 1; i--) {
+
+        /*
+         * Define the subgroup name and delete the subgroup.
+         */
+        name[1] = ((char)i) + '0'; /* G1, G2, G3 etc. */
+        status  = H5Ldelete(group, name, H5P_DEFAULT);
+
+        /*
+         * Obtain the group info and print the group storage type
+         */
+        status = H5Gget_info(group, &ginfo);
+        printf("%d Group%s: Storage type is ", (int)ginfo.nlinks, ginfo.nlinks == 1 ? " " : "s");
+        switch (ginfo.storage_type) {
+            case H5G_STORAGE_TYPE_COMPACT:
+                printf("H5G_STORAGE_TYPE_COMPACT\n"); /* New compact format */
+                break;
+            case H5G_STORAGE_TYPE_DENSE:
+                printf("H5G_STORAGE_TYPE_DENSE\n"); /* New dense (indexed) format */
+                break;
+            case H5G_STORAGE_TYPE_SYMBOL_TABLE:
+                printf("H5G_STORAGE_TYPE_SYMBOL_TABLE\n"); /* Original format */
+                break;
+            case H5G_STORAGE_TYPE_UNKNOWN:
+                printf("H5G_STORAGE_TYPE_UNKNOWN\n"); /* Unknown format */
+        }
+    }
+
+    /*
+     * Close and release resources.
+     */
+    status = H5Pclose(fapl);
+    status = H5Pclose(gcpl);
+    status = H5Gclose(group);
+    status = H5Fclose(file);
+
+    return 0;
+}