Merge pull request #272 in HDFFV/hdf5 from develop_merge_cache_image_06 to develop

* commit 'a9808853d52b368f9ab7336a261c0555f22526f1':
  Add missing files
  Cache image feature and testing
  Bring change to use array of metadata cache entry classes for H5C_create instead of array of class names from cache image branch.
  Switch list lengths to unsigned integers (to align better w/cache image merge)

1 files changed, 3893 insertions, 0 deletions

diff --git a/test/genall5.c b/test/genall5.c
new file mode 100644
index 0000000..1d92e96
--- /dev/null
+++ b/test/genall5.c
@@ -0,0 +1,3893 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/* Programmer:  John Mainzer
+ *		9/23/15
+ *
+ *		This file contains a heavily edited and functionaly reduce 
+ *		version of the test code first written by Quincey in a file
+ *		of the same name.
+ */
+
+#include <assert.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+#include "hdf5.h"
+#include "cache_common.h"
+#include "genall5.h"
+
+#define DSET_DIMS (1024 * 1024)
+#define DSET_SMALL_DIMS (64 * 1024)
+#define DSET_CHUNK_DIMS 1024
+#define DSET_COMPACT_DIMS 4096
+
+
+/*-------------------------------------------------------------------------
+ * Function:    ns_grp_0
+ *
+ * Purpose:     Create an empty "new style" group at the specified location
+ *		in the specified file.
+ *
+ *              If pass is false on entry, do nothing.
+ *
+ *              If an error is detected, set pass to FALSE, and set
+ *              failure_mssg to point to an appropriate error message.
+ *
+ * Return:      void
+ *
+ * Programmer:  John Mainzer
+ *              9/14/15
+ *
+ *-------------------------------------------------------------------------
+ */
+
+void
+ns_grp_0(hid_t fid, const char *group_name)
+{
+    hid_t gid = -1;
+    hid_t gcpl = -1;
+    herr_t ret;
+
+    if ( pass ) {
+
+        gcpl = H5Pcreate(H5P_GROUP_CREATE);
+
+	if ( gcpl <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ns_grp_0: H5Pcreate() failed";
+	}
+        assert(gcpl > 0);
+    }
+
+    if ( pass ) {
+
+        ret = H5Pset_link_creation_order(gcpl, H5P_CRT_ORDER_TRACKED);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ns_grp_0: H5Pset_link_creation_order() failed";
+	}
+        assert(ret >= 0);
+    }
+
+    if ( pass ) {
+
+        gid = H5Gcreate2(fid, group_name, H5P_DEFAULT, gcpl, H5P_DEFAULT);
+
+	if ( gid <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ns_grp_0: H5Gcreate2() failed";
+        }
+        assert(gid > 0);
+    }
+
+    if ( pass ) {
+
+        ret = H5Pclose(gcpl);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ns_grp_0: H5Pclose(gcpl) failed";
+        }
+        assert(ret >= 0);
+    }
+
+    if ( pass ) {
+
+        ret = H5Gclose(gid);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ns_grp_0: H5Gclose(gid) failed";
+        }
+        assert(ret >= 0);
+    }
+
+    return;
+
+} /* ns_grp_0 */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    vrfy_ns_grp_0
+ *
+ * Purpose:     verify an empty "new style" group at the specified location
+ *              in the specified file.
+ *
+ *              If pass is false on entry, do nothing.
+ *
+ *              If an error is detected, set pass to FALSE, and set
+ *              failure_mssg to point to an appropriate error message.
+ *
+ * Return:      void
+ *
+ * Programmer:  John Mainzer
+ *              9/14/15
+ *
+ *-------------------------------------------------------------------------
+ */
+
+void vrfy_ns_grp_0(hid_t fid, const char *group_name)
+{
+    hid_t gid = -1;
+    hid_t gcpl = -1;
+    H5G_info_t grp_info;
+    unsigned crt_order_flags = 0;
+    herr_t ret;
+
+    if ( pass ) {
+
+        gid = H5Gopen2(fid, group_name, H5P_DEFAULT);
+
+	if ( gid <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ns_grp_0: H5Gopen2() failed";
+        }
+        HDassert(gid > 0);
+    }
+
+    if ( pass ) {
+
+        gcpl = H5Gget_create_plist(gid);
+
+	if ( gcpl <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ns_grp_0: H5Gget_create_plist() failed";
+        }
+        HDassert(gcpl > 0);
+    }
+
+    if ( pass ) {
+
+        ret = H5Pget_link_creation_order(gcpl, &crt_order_flags);
+
+	if ( gcpl <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ns_grp_0: H5Pget_link_creation_order() failed";
+        }
+        else if ( H5P_CRT_ORDER_TRACKED != crt_order_flags ) {
+
+	    pass = FALSE;
+            failure_mssg = 
+		"vrfy_ns_grp_0: H5P_CRT_ORDER_TRACKED != crt_order_flags";
+        }
+        HDassert(ret >= 0);
+        HDassert(H5P_CRT_ORDER_TRACKED == crt_order_flags);
+    }
+
+    if ( pass ) {
+
+        ret = H5Pclose(gcpl);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ns_grp_0: H5Pclose() failed";
+        }
+        HDassert(ret >= 0);
+    }
+
+    if ( pass ) {
+
+        memset(&grp_info, 0, sizeof(grp_info));
+        ret = H5Gget_info(gid, &grp_info);
+
+	if ( ret < 0 ) {
+
+            pass = FALSE;
+            failure_mssg = "vrfy_ns_grp_0: H5Gget_info() failed";
+        }
+        else if ( H5G_STORAGE_TYPE_COMPACT != grp_info.storage_type ) {
+
+            pass = FALSE;
+            failure_mssg = 
+	     "vrfy_ns_grp_0: H5G_STORAGE_TYPE_COMPACT != grp_info.storage_type";
+        }
+	else if ( 0 != grp_info.nlinks ) {
+
+            pass = FALSE;
+            failure_mssg = "vrfy_ns_grp_0: 0 != grp_info.nlinks";
+        }
+        else if ( 0 != grp_info.max_corder ) {
+
+            pass = FALSE;
+            failure_mssg = "vrfy_ns_grp_0: 0 != grp_info.max_corder";
+        }
+        else if ( FALSE != grp_info.mounted ) {
+
+            pass = FALSE;
+            failure_mssg = "vrfy_ns_grp_0: FALSE != grp_info.mounted";
+        }
+
+        HDassert(ret >= 0);
+        HDassert(H5G_STORAGE_TYPE_COMPACT == grp_info.storage_type);
+        HDassert(0 == grp_info.nlinks);
+        HDassert(0 == grp_info.max_corder);
+        HDassert(false == grp_info.mounted);
+    }
+
+    if ( pass ) {
+
+        ret = H5Gclose(gid);
+
+	if ( ret < 0 ) {
+
+            pass = FALSE;
+            failure_mssg = "vrfy_ns_grp_0: H5Gclose() failed";
+        }
+        HDassert(ret >= 0);
+    }
+
+    return;
+
+} /* vrfy_ns_grp_0() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    ns_grp_c
+ *
+ * Purpose:     Create a compact "new style" group, with 'nlinks' 
+ *		soft/hard/external links in it in the specified file.
+ *
+ *              If pass is false on entry, do nothing.
+ *
+ *              If an error is detected, set pass to FALSE, and set
+ *              failure_mssg to point to an appropriate error message.
+ *
+ * Return:      void
+ *
+ * Programmer:  John Mainzer
+ *              9/14/15
+ *
+ *-------------------------------------------------------------------------
+ */
+
+void 
+ns_grp_c(hid_t fid, const char *group_name, unsigned nlinks)
+{
+    hid_t gid = -1;
+    hid_t gcpl = -1;
+    unsigned max_compact;
+    unsigned u;
+    herr_t ret;
+
+    if ( pass ) {
+
+        gcpl = H5Pcreate(H5P_GROUP_CREATE);
+
+        if ( gcpl <= 0 ) {
+
+            pass = FALSE;
+            failure_mssg = "ns_grp_c: H5Pcreate(H5P_GROUP_CREATE) failed";
+        }
+        HDassert(gcpl > 0);
+    }
+
+    if ( pass ) {
+
+        ret = H5Pset_link_creation_order(gcpl, H5P_CRT_ORDER_TRACKED);
+
+        if ( ret < 0 ) {
+
+            pass = FALSE;
+            failure_mssg = "ns_grp_c:  H5Pset_link_creation_order() failed";
+        }
+        HDassert(ret >= 0);
+    }
+
+    if ( pass ) {
+
+        gid = H5Gcreate2(fid, group_name, H5P_DEFAULT, gcpl, H5P_DEFAULT);
+
+        if ( gid <= 0 ) {
+
+            pass = FALSE;
+            failure_mssg = "ns_grp_c: H5Gcreate2() failed";
+        }
+        HDassert(gid > 0);
+    }
+
+    if ( pass ) {
+
+        max_compact = 0;
+        ret = H5Pget_link_phase_change(gcpl, &max_compact, NULL);
+
+        if ( ret < 0 ) {
+
+            pass = FALSE;
+            failure_mssg = "ns_grp_c: H5Pget_link_phase_change() failed";
+        }
+	else if ( nlinks <= 0 ) {
+
+            pass = FALSE;
+            failure_mssg = "ns_grp_c: nlinks <= 0";
+        }
+	else if ( nlinks >= max_compact ) {
+
+            pass = FALSE;
+            failure_mssg = "ns_grp_c: nlinks >= max_compact";
+        }
+
+        HDassert(ret >= 0);
+        HDassert(nlinks > 0);
+        HDassert(nlinks < max_compact);
+    }
+
+    u = 0;
+    while ( ( pass ) && ( u < nlinks ) ) {
+
+        char linkname[16];
+
+        sprintf(linkname, "%u", u);
+
+        if(0 == (u % 3)) {
+
+            ret = H5Lcreate_soft(group_name, gid, linkname, H5P_DEFAULT, 
+                                 H5P_DEFAULT);
+
+	    if ( ret < 0 ) {
+
+                pass = FALSE;
+                failure_mssg = "ns_grp_c: H5Lcreate_soft() failed";
+            }
+            HDassert(ret >= 0);
+        } /* end if */
+        else if(1 == (u % 3)) {
+
+            ret = H5Lcreate_hard(fid, "/", gid, linkname, H5P_DEFAULT, 
+                                 H5P_DEFAULT);
+
+	    if ( ret < 0 ) {
+
+                pass = FALSE;
+                failure_mssg = "ns_grp_c: H5Lcreate_hard() failed";
+            }
+            HDassert(ret >= 0);
+        } /* end else-if */
+        else {
+
+            HDassert(2 == (u % 3));
+            ret = H5Lcreate_external("external.h5", "/ext", gid, linkname, 
+                                     H5P_DEFAULT, H5P_DEFAULT);
+
+	    if ( ret < 0 ) {
+
+                pass = FALSE;
+                failure_mssg = "ns_grp_c: H5Lcreate_external() failed";
+            }
+            HDassert(ret >= 0);
+        } /* end else */
+
+	u++;
+
+    } /* end while() */
+
+    if ( pass ) {
+
+        ret = H5Pclose(gcpl);
+
+	if ( ret < 0 ) {
+
+            pass = FALSE;
+            failure_mssg = "ns_grp_c: H5Pclose(gcpl) failed";
+        }
+        HDassert(ret >= 0);
+    }
+
+    if ( pass ) {
+
+        ret = H5Gclose(gid);
+
+	if ( ret < 0 ) {
+
+            pass = FALSE;
+            failure_mssg = "ns_grp_c: H5Gclose(gid) failed";
+        }
+        HDassert(ret >= 0);
+    }
+
+    return;
+
+} /* ns_grp_c() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    vrfy_ns_grp_c
+ *
+ * Purpose:     Verify a compact "new style" group, with 'nlinks' 
+ *		soft/hard/external links in it in the specified file.
+ *
+ *              If pass is false on entry, do nothing.
+ *
+ *              If an error is detected, set pass to FALSE, and set
+ *              failure_mssg to point to an appropriate error message.
+ *
+ * Return:      void
+ *
+ * Programmer:  John Mainzer
+ *              9/14/15
+ *
+ *-------------------------------------------------------------------------
+ */
+
+void
+vrfy_ns_grp_c(hid_t fid, const char *group_name, unsigned nlinks)
+{
+    hid_t gid = -1;
+    hid_t gcpl = -1;
+    H5G_info_t grp_info;
+    unsigned crt_order_flags = 0;
+    unsigned u;
+    herr_t ret;
+
+    if ( pass ) {
+
+        gid = H5Gopen2(fid, group_name, H5P_DEFAULT);
+
+	if ( gid <= 0 ) {
+
+            pass = FALSE;
+            failure_mssg = "vrfy_ns_grp_c: H5Gopen2() failed";
+        }
+        HDassert(gid > 0);
+    }
+
+    if ( pass ) {
+
+        gcpl = H5Gget_create_plist(gid);
+
+	if ( gcpl <= 0 ) {
+
+            pass = FALSE;
+            failure_mssg = "vrfy_ns_grp_c: H5Gget_create_plist(gid) failed";
+        }
+        assert(gcpl > 0);
+    }
+
+    if ( pass ) {
+
+        ret = H5Pget_link_creation_order(gcpl, &crt_order_flags);
+
+	if ( ret < 0 ) {
+
+            pass = FALSE;
+            failure_mssg = "vrfy_ns_grp_c: H5Pget_link_creation_order() failed";
+        }
+        else if ( H5P_CRT_ORDER_TRACKED != crt_order_flags ) {
+
+            pass = FALSE;
+            failure_mssg = 
+		"vrfy_ns_grp_c: H5P_CRT_ORDER_TRACKED != crt_order_flags";
+        }
+        HDassert(ret >= 0);
+        HDassert(H5P_CRT_ORDER_TRACKED == crt_order_flags);
+    }
+
+    if ( pass ) {
+
+        ret = H5Pclose(gcpl);
+
+	if ( ret < 0 ) {
+
+            pass = FALSE;
+            failure_mssg = "vrfy_ns_grp_c: H5Pclose() failed";
+        }
+        HDassert(ret >= 0);
+    }
+
+    if ( pass ) {
+
+        memset(&grp_info, 0, sizeof(grp_info));
+        ret = H5Gget_info(gid, &grp_info);
+
+	if ( ret < 0 ) {
+
+            pass = FALSE;
+            failure_mssg = "vrfy_ns_grp_c: H5Gget_info() failed";
+        }
+        else if ( H5G_STORAGE_TYPE_COMPACT != grp_info.storage_type ) {
+
+            pass = FALSE;
+            failure_mssg = 
+	     "vrfy_ns_grp_c: H5G_STORAGE_TYPE_COMPACT != grp_info.storage_type";
+        }
+        else if ( nlinks != grp_info.nlinks ) {
+
+            pass = FALSE;
+            failure_mssg = "vrfy_ns_grp_c: nlinks != grp_info.nlinks";
+        }
+        else if ( nlinks != grp_info.max_corder ) {
+
+            pass = FALSE;
+            failure_mssg = "vrfy_ns_grp_c: nlinks != grp_info.max_corder";
+        }
+        else if ( FALSE != grp_info.mounted ) {
+
+            pass = FALSE;
+            failure_mssg = "vrfy_ns_grp_c: FALSE != grp_info.mounted";
+        }
+
+        HDassert(ret >= 0);
+        HDassert(H5G_STORAGE_TYPE_COMPACT == grp_info.storage_type);
+        HDassert(nlinks == grp_info.nlinks);
+        HDassert(nlinks == grp_info.max_corder);
+        HDassert(false == grp_info.mounted);
+    }
+
+    u = 0;
+    while ( ( pass ) && ( u < nlinks ) ) {
+
+        H5L_info_t lnk_info;
+        char linkname[16];
+        htri_t link_exists;
+
+        sprintf(linkname, "%u", u);
+        link_exists = H5Lexists(gid, linkname, H5P_DEFAULT);
+
+	if ( link_exists < 0 ) {
+
+            pass = FALSE;
+            failure_mssg = "vrfy_ns_grp_c: H5Lexists() failed";
+        }
+        HDassert(link_exists >= 0);
+
+        memset(&lnk_info, 0, sizeof(grp_info));
+        ret = H5Lget_info(gid, linkname, &lnk_info, H5P_DEFAULT);
+
+	if ( ret < 0 ) {
+
+            pass = FALSE;
+            failure_mssg = "vrfy_ns_grp_c: H5Lget_info() failed";
+        }
+        else if ( TRUE != lnk_info.corder_valid ) {
+
+            pass = FALSE;
+            failure_mssg = "vrfy_ns_grp_c: TRUE != lnk_info.corder_valid";
+        }
+        else if ( u != lnk_info.corder ) {
+
+            pass = FALSE;
+            failure_mssg = "vrfy_ns_grp_c: u != lnk_info.corder";
+        }
+        else if ( H5T_CSET_ASCII != lnk_info.cset ) {
+
+            pass = FALSE;
+            failure_mssg = "vrfy_ns_grp_c: H5T_CSET_ASCII != lnk_info.cset";
+        }
+        HDassert(ret >= 0);
+        HDassert(true == lnk_info.corder_valid);
+        HDassert(u == lnk_info.corder);
+        HDassert(H5T_CSET_ASCII == lnk_info.cset);
+
+        if ( 0 == (u % 3) ) {
+
+            char *slinkval;
+
+	    if ( H5L_TYPE_SOFT != lnk_info.type ) {
+
+                pass = FALSE;
+                failure_mssg = "vrfy_ns_grp_c: H5L_TYPE_SOFT != lnk_info.type";
+            }
+            else if ( (strlen(group_name) + 1) != lnk_info.u.val_size ) {
+
+                pass = FALSE;
+                failure_mssg = 
+	       "vrfy_ns_grp_c: (strlen(group_name) + 1) != lnk_info.u.val_size";
+            }
+            HDassert(H5L_TYPE_SOFT == lnk_info.type);
+            HDassert((strlen(group_name) + 1) == lnk_info.u.val_size);
+
+            slinkval = (char *)malloc(lnk_info.u.val_size);
+
+	    if ( ! slinkval ) {
+
+                pass = FALSE;
+                failure_mssg = "vrfy_ns_grp_c: malloc of slinkval failed";
+            }
+            HDassert(slinkval);
+
+            ret = H5Lget_val(gid, linkname, slinkval, lnk_info.u.val_size, 
+                             H5P_DEFAULT);
+            if ( ret < 0 ) {
+
+                pass = FALSE;
+                failure_mssg = "vrfy_ns_grp_c: H5Lget_val() failed";
+            }
+	    else if ( 0 != strcmp(slinkval, group_name) ) {
+
+                pass = FALSE;
+                failure_mssg = 
+		    "vrfy_ns_grp_c: 0 != strcmp(slinkval, group_name)";
+            }
+            HDassert(ret >= 0);
+            HDassert(0 == strcmp(slinkval, group_name));
+
+            free(slinkval);
+        } /* end if */
+        else if(1 == (u % 3)) {
+
+            H5O_info_t root_oinfo;
+
+	    if ( H5L_TYPE_HARD != lnk_info.type ) {
+
+                pass = FALSE;
+                failure_mssg = "vrfy_ns_grp_c: H5L_TYPE_HARD != lnk_info.type";
+            }
+            HDassert(H5L_TYPE_HARD == lnk_info.type);
+
+            memset(&root_oinfo, 0, sizeof(root_oinfo));
+            ret = H5Oget_info(fid, &root_oinfo);
+
+	    if ( ret < 0 ) {
+
+                pass = FALSE;
+                failure_mssg = "vrfy_ns_grp_c: H5Oget_info() failed.";
+            }
+            else if ( root_oinfo.addr != lnk_info.u.address ) {
+
+                pass = FALSE;
+                failure_mssg = 
+		    "vrfy_ns_grp_c: root_oinfo.addr != lnk_info.u.address";
+            }
+            HDassert(ret >= 0);
+            HDassert(root_oinfo.addr == lnk_info.u.address);
+        } /* end else-if */
+        else {
+            void *elinkval;
+            const char *file = NULL;
+            const char *path = NULL;
+
+            HDassert(2 == (u % 3));
+
+	    if ( H5L_TYPE_EXTERNAL != lnk_info.type ) {
+
+                pass = FALSE;
+                failure_mssg = 
+		    "vrfy_ns_grp_c: H5L_TYPE_EXTERNAL != lnk_info.type";
+            }
+            HDassert(H5L_TYPE_EXTERNAL == lnk_info.type);
+
+            elinkval = malloc(lnk_info.u.val_size);
+
+	    if ( ! elinkval ) {
+
+                pass = FALSE;
+                failure_mssg = "vrfy_ns_grp_c: malloc of elinkval failed.";
+            }
+            HDassert(elinkval);
+
+            ret = H5Lget_val(gid, linkname, elinkval, lnk_info.u.val_size, 
+                             H5P_DEFAULT);
+	    if ( ret < 0 ) {
+
+                pass = FALSE;
+                failure_mssg = "vrfy_ns_grp_c: H5Lget_val() failed.";
+            }
+            HDassert(ret >= 0);
+
+            ret = H5Lunpack_elink_val(elinkval, lnk_info.u.val_size, 
+                                      NULL, &file, &path);
+	    if ( ret < 0 ) {
+
+                pass = FALSE;
+                failure_mssg = "vrfy_ns_grp_c: H5Lunpack_elink_val() failed.";
+            }
+	    else if ( 0 != strcmp(file, "external.h5") ) {
+
+                pass = FALSE;
+                failure_mssg = 
+		    "vrfy_ns_grp_c: 0 != strcmp(file, \"external.h5\")";
+            }
+	    else if ( 0 != strcmp(path, "/ext") ) {
+
+                pass = FALSE;
+                failure_mssg = "vrfy_ns_grp_c: 0 != strcmp(path, \"/ext\")";
+            }
+            HDassert(ret >= 0);
+            HDassert(0 == strcmp(file, "external.h5"));
+            HDassert(0 == strcmp(path, "/ext"));
+
+            free(elinkval);
+        } /* end else */
+
+	u++;
+
+    } /* end while */
+
+    if ( pass ) {
+
+        ret = H5Gclose(gid);
+
+        if ( ret < 0 ) {
+
+            pass = FALSE;
+            failure_mssg = "vrfy_ns_grp_c: H5Gclose() failed.";
+        }
+        assert(ret >= 0);
+    }
+
+    return;
+
+} /* vrfy_ns_grp_c() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    ns_grp_d
+ *
+ * Purpose:     Create a dense "new style" group, with 'nlinks' 
+ *		(soft/hard/external) links in it in the specified file.
+ *
+ *              If pass is false on entry, do nothing.
+ *
+ *              If an error is detected, set pass to FALSE, and set
+ *              failure_mssg to point to an appropriate error message.
+ *
+ * Return:      void
+ *
+ * Programmer:  John Mainzer
+ *              9/14/15
+ *
+ *-------------------------------------------------------------------------
+ */
+
+void
+ns_grp_d(hid_t fid, const char *group_name, unsigned nlinks)
+{
+    hid_t gid = -1;
+    hid_t gcpl = -1;
+    unsigned max_compact;
+    unsigned u;
+    herr_t ret;
+
+    if ( pass ) {
+
+        gcpl = H5Pcreate(H5P_GROUP_CREATE);
+
+	if ( gcpl <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ns_grp_d: H5Pcreate() failed.";
+	}
+        HDassert(gcpl > 0);
+    }
+
+    if ( pass ) {
+
+        ret = H5Pset_link_creation_order(gcpl, H5P_CRT_ORDER_TRACKED);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ns_grp_d: H5Pset_link_creation_order() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    if ( pass ) {
+
+        gid = H5Gcreate2(fid, group_name, H5P_DEFAULT, gcpl, H5P_DEFAULT);
+
+	if ( gid <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ns_grp_d: H5Gcreate2() failed.";
+	}
+        HDassert(gid > 0);
+    }
+
+    if ( pass ) {
+
+        max_compact = 0;
+        ret = H5Pget_link_phase_change(gcpl, &max_compact, NULL);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ns_grp_d: H5Pget_link_phase_change() failed.";
+	}
+        else if ( nlinks <= max_compact ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ns_grp_d: nlinks <= max_compact";
+	}
+        HDassert(ret >= 0);
+        HDassert(nlinks > max_compact);
+    }
+
+    u = 0;
+    while ( ( pass ) && ( u < nlinks ) ) {
+
+        char linkname[16];
+
+        sprintf(linkname, "%u", u);
+
+        if(0 == (u % 3)) {
+
+            ret = H5Lcreate_soft(group_name, gid, linkname, 
+                                 H5P_DEFAULT, H5P_DEFAULT);
+
+	    if ( ret < 0 ) {
+
+	        pass = FALSE;
+	        failure_mssg = "ns_grp_d: H5Lcreate_soft() failed.";
+	    }
+            HDassert(ret >= 0);
+        } /* end if */
+        else if(1 == (u % 3)) {
+
+            ret = H5Lcreate_hard(fid, "/", gid, linkname, 
+                                 H5P_DEFAULT, H5P_DEFAULT);
+
+	    if ( ret < 0 ) {
+
+	        pass = FALSE;
+	        failure_mssg = "ns_grp_d: H5Lcreate_hard() failed.";
+	    }
+            HDassert(ret >= 0);
+        } /* end else-if */
+        else {
+
+            HDassert(2 == (u % 3));
+
+            ret = H5Lcreate_external("external.h5", "/ext", gid, linkname, 
+                                     H5P_DEFAULT, H5P_DEFAULT);
+
+	    if ( ret < 0 ) {
+
+	        pass = FALSE;
+	        failure_mssg = "ns_grp_d: H5Lcreate_external() failed.";
+	    }
+            HDassert(ret >= 0);
+        } /* end else */
+
+        u++;
+
+    } /* end while */
+
+    if ( pass ) {
+
+        ret = H5Pclose(gcpl);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ns_grp_d: H5Pclose() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    if ( pass ) {
+
+        ret = H5Gclose(gid);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ns_grp_d: H5Gclose() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    return;
+
+} /* ns_grp_d() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    vrfy_ns_grp_d
+ *
+ * Purpose:     Verify a dense "new style" group, with 'nlinks' 
+ *		soft/hard/external links in it in the specified file.
+ *
+ *              If pass is false on entry, do nothing.
+ *
+ *              If an error is detected, set pass to FALSE, and set
+ *              failure_mssg to point to an appropriate error message.
+ *
+ * Return:      void
+ *
+ * Programmer:  John Mainzer
+ *              9/14/15
+ *
+ *-------------------------------------------------------------------------
+ */
+
+
+void
+vrfy_ns_grp_d(hid_t fid, const char *group_name, unsigned nlinks)
+{
+    hid_t gid = -1;
+    hid_t gcpl = -1;
+    H5G_info_t grp_info;
+    unsigned crt_order_flags = 0;
+    unsigned u;
+    herr_t ret;
+
+    if ( pass ) {
+
+        gid = H5Gopen2(fid, group_name, H5P_DEFAULT);
+
+        if ( gid <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ns_grp_d: H5Gopen2() failed.";
+        }
+        HDassert(gid > 0);
+    }
+
+    if ( pass ) {
+
+        gcpl = H5Gget_create_plist(gid);
+
+        if ( gcpl <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ns_grp_d: H5Gget_create_plist() failed.";
+        }
+        assert(gcpl > 0);
+    }
+
+    if ( pass ) {
+
+        ret = H5Pget_link_creation_order(gcpl, &crt_order_flags);
+
+        if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = 
+		"vrfy_ns_grp_d: H5Pget_link_creation_order() failed.";
+        }
+	else if ( H5P_CRT_ORDER_TRACKED != crt_order_flags ) {
+
+	    pass = FALSE;
+	    failure_mssg = 
+		"vrfy_ns_grp_d: H5P_CRT_ORDER_TRACKED != crt_order_flags";
+        }
+        HDassert(ret >= 0);
+        HDassert(H5P_CRT_ORDER_TRACKED == crt_order_flags);
+    }
+
+    if ( pass ) {
+
+        ret = H5Pclose(gcpl);
+
+        if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ns_grp_d: H5Pclose() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    if ( pass ) {
+
+        memset(&grp_info, 0, sizeof(grp_info));
+        ret = H5Gget_info(gid, &grp_info);
+
+        if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ns_grp_d: H5Gget_info() failed.";
+	}
+	else if ( H5G_STORAGE_TYPE_DENSE != grp_info.storage_type ) {
+
+	    pass = FALSE;
+	    failure_mssg = 
+	       "vrfy_ns_grp_d: H5G_STORAGE_TYPE_DENSE != grp_info.storage_type";
+	}
+	else if ( nlinks != grp_info.nlinks ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ns_grp_d: nlinks != grp_info.nlinks";
+	}
+	else if ( nlinks != grp_info.max_corder ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ns_grp_d: nlinks != grp_info.max_corder";
+	}
+	else if ( FALSE != grp_info.mounted ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ns_grp_d: FALSE != grp_info.mounted";
+	}
+        HDassert(ret >= 0);
+        HDassert(H5G_STORAGE_TYPE_DENSE == grp_info.storage_type);
+        HDassert(nlinks == grp_info.nlinks);
+        HDassert(nlinks == grp_info.max_corder);
+        HDassert(false == grp_info.mounted);
+    }
+
+    u = 0;
+    while ( ( pass ) && ( u < nlinks ) ) {
+
+        H5L_info_t lnk_info;
+        char linkname[16];
+        htri_t link_exists;
+
+        sprintf(linkname, "%u", u);
+        link_exists = H5Lexists(gid, linkname, H5P_DEFAULT);
+
+        if ( link_exists < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ns_grp_d: H5Lexists() failed.";
+	}
+        HDassert(link_exists >= 0);
+
+        memset(&lnk_info, 0, sizeof(grp_info));
+        ret = H5Lget_info(gid, linkname, &lnk_info, H5P_DEFAULT);
+
+        if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ns_grp_d: H5Lget_info() failed.";
+	}
+        else if ( TRUE != lnk_info.corder_valid ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ns_grp_d: TRUE != lnk_info.corder_valid";
+	}
+	else if ( u != lnk_info.corder ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ns_grp_d: u != lnk_info.corder";
+	}
+	else if ( H5T_CSET_ASCII != lnk_info.cset ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ns_grp_d: H5T_CSET_ASCII != lnk_info.cset";
+	}
+        HDassert(ret >= 0);
+        HDassert(true == lnk_info.corder_valid);
+        HDassert(u == lnk_info.corder);
+        HDassert(H5T_CSET_ASCII == lnk_info.cset);
+
+        if(0 == (u % 3)) {
+            char *slinkval;
+
+	    if ( H5L_TYPE_SOFT != lnk_info.type ) {
+
+	        pass = FALSE;
+	        failure_mssg = "vrfy_ns_grp_d: H5L_TYPE_SOFT != lnk_info.type";
+	    }
+	    else if ( (strlen(group_name) + 1) != lnk_info.u.val_size ) {
+
+	        pass = FALSE;
+	        failure_mssg = "vrfy_ns_grp_d: H5L_TYPE_SOFT != lnk_info.type";
+	    }
+            HDassert(H5L_TYPE_SOFT == lnk_info.type);
+            HDassert((strlen(group_name) + 1) == lnk_info.u.val_size);
+
+            slinkval = (char *)malloc(lnk_info.u.val_size);
+
+	    if ( ! slinkval ) {
+
+	        pass = FALSE;
+	        failure_mssg = "vrfy_ns_grp_d: malloc of slinkval failed";
+	    }
+            HDassert(slinkval);
+
+            ret = H5Lget_val(gid, linkname, slinkval, lnk_info.u.val_size, 
+                             H5P_DEFAULT);
+	    if ( ret < 0 ) {
+
+	        pass = FALSE;
+	        failure_mssg = "vrfy_ns_grp_d: H5Lget_val() failed";
+	    }
+	    else if ( 0 != strcmp(slinkval, group_name) ) {
+
+	        pass = FALSE;
+	        failure_mssg = 
+		    "vrfy_ns_grp_d: 0 != strcmp(slinkval, group_name)";
+	    }
+            HDassert(ret >= 0);
+            HDassert(0 == strcmp(slinkval, group_name));
+
+            free(slinkval);
+        } /* end if */
+        else if(1 == (u % 3)) {
+            H5O_info_t root_oinfo;
+
+	    if ( H5L_TYPE_HARD != lnk_info.type ) {
+
+	        pass = FALSE;
+	        failure_mssg = "vrfy_ns_grp_d: H5L_TYPE_HARD != lnk_info.type";
+	    }
+            HDassert(H5L_TYPE_HARD == lnk_info.type);
+
+            memset(&root_oinfo, 0, sizeof(root_oinfo));
+            ret = H5Oget_info(fid, &root_oinfo);
+	    if ( ret < 0 ) {
+
+	        pass = FALSE;
+	        failure_mssg = "vrfy_ns_grp_d: H5Oget_info() failed.";
+	    }
+	    else if ( root_oinfo.addr != lnk_info.u.address ) {
+
+	        pass = FALSE;
+	        failure_mssg = 
+		    "vrfy_ns_grp_d: root_oinfo.addr != lnk_info.u.address";
+	    }
+            HDassert(ret >= 0);
+            HDassert(root_oinfo.addr == lnk_info.u.address);
+        } /* end else-if */
+        else {
+            void *elinkval;
+            const char *file = NULL;
+            const char *path = NULL;
+
+            HDassert(2 == (u % 3));
+
+	    if ( H5L_TYPE_EXTERNAL != lnk_info.type ) {
+
+	        pass = FALSE;
+	        failure_mssg = 
+		    "vrfy_ns_grp_d: H5L_TYPE_EXTERNAL != lnk_info.type";
+	    }
+            HDassert(H5L_TYPE_EXTERNAL == lnk_info.type);
+
+            elinkval = malloc(lnk_info.u.val_size);
+
+	    if ( ! elinkval ) {
+
+	        pass = FALSE;
+	        failure_mssg = "vrfy_ns_grp_d: malloc of elinkval failed.";
+	    }
+            HDassert(elinkval);
+
+            ret = H5Lget_val(gid, linkname, elinkval, lnk_info.u.val_size, 
+                             H5P_DEFAULT);
+	    if ( ret < 0 ) {
+
+		pass = FALSE;
+                failure_mssg = "vrfy_ns_grp_d: H5Lget_val failed.";
+            }
+            HDassert(ret >= 0);
+
+            ret = H5Lunpack_elink_val(elinkval, lnk_info.u.val_size, NULL, 
+				      &file, &path);
+	    if ( ret < 0 ) {
+
+		pass = FALSE;
+                failure_mssg = "vrfy_ns_grp_d: H5Lunpack_elink_val failed.";
+            }
+	    else if ( 0 != strcmp(file, "external.h5") ) {
+
+		pass = FALSE;
+                failure_mssg = 
+		    "vrfy_ns_grp_d: 0 != strcmp(file, \"external.h5\").";
+            }
+	    else if ( 0 != strcmp(path, "/ext") ) {
+
+		pass = FALSE;
+                failure_mssg = 
+		    "vrfy_ns_grp_d: 0 != strcmp(path, \"/ext\")";
+	    }
+            HDassert(ret >= 0);
+            HDassert(0 == strcmp(file, "external.h5"));
+            HDassert(0 == strcmp(path, "/ext"));
+
+            free(elinkval);
+
+        } /* end else */
+
+	u++;
+
+    } /* end while() */
+
+    if ( pass ) {
+
+        ret = H5Gclose(gid);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ns_grp_d: H5Gclose() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    return;
+
+} /* vrfy_ns_grp_d() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    os_grp_0
+ *
+ * Purpose:     Create an empty "old style" group.
+ *
+ *              If pass is false on entry, do nothing.
+ *
+ *              If an error is detected, set pass to FALSE, and set
+ *              failure_mssg to point to an appropriate error message.
+ *
+ * Return:      void
+ *
+ * Programmer:  John Mainzer
+ *              9/14/15
+ *
+ *-------------------------------------------------------------------------
+ */
+
+void
+os_grp_0(hid_t fid, const char *group_name)
+{
+    hid_t gid = -1;
+    herr_t ret;
+
+    if ( pass ) { /* turn file format latest off */
+
+	ret = H5Fset_latest_format(fid, FALSE);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "os_grp_0: H5Fset_latest_format() failed(1).";
+	}
+        HDassert(ret >= 0);
+    }
+
+    if ( pass ) {
+
+        gid = H5Gcreate2(fid, group_name, H5P_DEFAULT, H5P_DEFAULT, 
+                         H5P_DEFAULT);
+        if ( gid <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "os_grp_0: H5Gcreate2() failed.";
+	}
+        HDassert(gid > 0);
+    }
+
+    if ( pass ) {
+
+        ret = H5Gclose(gid);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "os_grp_0: H5Gclose() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    if ( pass ) { /* turn file format latest on */
+
+	ret = H5Fset_latest_format(fid, TRUE);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "os_grp_0: H5Fset_latest_format() failed(2).";
+	}
+        HDassert(ret >= 0);
+    }
+
+    return;
+
+} /* os_grp_0() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    vrfy_os_grp_0
+ *
+ * Purpose:     Validate an empty "old style" group.
+ *
+ *              If pass is false on entry, do nothing.
+ *
+ *              If an error is detected, set pass to FALSE, and set
+ *              failure_mssg to point to an appropriate error message.
+ *
+ * Return:      void
+ *
+ * Programmer:  John Mainzer
+ *              9/14/15
+ *
+ *-------------------------------------------------------------------------
+ */
+
+void
+vrfy_os_grp_0(hid_t fid, const char *group_name)
+{
+    hid_t gid = -1;
+    hid_t gcpl = -1;
+    H5G_info_t grp_info;
+    unsigned crt_order_flags = 0;
+    herr_t ret;
+
+    if ( pass ) {
+
+        gid = H5Gopen2(fid, group_name, H5P_DEFAULT);
+
+	if ( gid <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_os_grp_0: H5Gopen2() failed.";
+	}
+        HDassert(gid > 0);
+    }
+
+    if ( pass ) {
+
+        gcpl = H5Gget_create_plist(gid);
+
+	if ( gcpl <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_os_grp_0: H5Gget_create_plist() failed.";
+	}
+        HDassert(gcpl > 0);
+    }
+
+    if ( pass ) {
+
+        ret = H5Pget_link_creation_order(gcpl, &crt_order_flags);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_os_grp_0: H5Pget_link_creation_order() failed";
+	}
+	else if ( 0 != crt_order_flags ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_os_grp_0: 0 != crt_order_flags";
+	}
+        HDassert(ret >= 0);
+        HDassert(0 == crt_order_flags);
+    }
+
+    if ( pass ) {
+
+        ret = H5Pclose(gcpl);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_os_grp_0: H5Pclose() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    if ( pass ) {
+
+        memset(&grp_info, 0, sizeof(grp_info));
+        ret = H5Gget_info(gid, &grp_info);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_os_grp_0: H5Gget_info() failed.";
+	}
+	else if ( H5G_STORAGE_TYPE_SYMBOL_TABLE != grp_info.storage_type ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_os_grp_0: H5G_STORAGE_TYPE_SYMBOL_TABLE != grp_info.storage_type";
+	}
+	else if ( 0 != grp_info.nlinks ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_os_grp_0: 0 != grp_info.nlinks";
+	}
+	else if ( 0 != grp_info.max_corder ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_os_grp_0: 0 != grp_info.max_corder";
+	}
+	else if ( FALSE != grp_info.mounted ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_os_grp_0: FALSE != grp_info.mounted";
+	}
+        HDassert(ret >= 0);
+        HDassert(H5G_STORAGE_TYPE_SYMBOL_TABLE == grp_info.storage_type);
+        HDassert(0 == grp_info.nlinks);
+        HDassert(0 == grp_info.max_corder);
+        HDassert(false == grp_info.mounted);
+    }
+
+    if ( pass ) {
+
+        ret = H5Gclose(gid);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_os_grp_0: H5Gclose() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    return;
+
+} /* vrfy_os_grp_0() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    os_grp_n
+ *
+ * Purpose:     Create an "old style" group, with 'nlinks' soft/hard 
+ *		links in it.
+ *
+ *              If pass is false on entry, do nothing.
+ *
+ *              If an error is detected, set pass to FALSE, and set
+ *              failure_mssg to point to an appropriate error message.
+ *
+ * Return:      void
+ *
+ * Programmer:  John Mainzer
+ *              9/14/15
+ *
+ *-------------------------------------------------------------------------
+ */
+
+void 
+os_grp_n(hid_t fid, const char *group_name, int proc_num, unsigned nlinks)
+{
+    hid_t gid = -1;
+    unsigned u;
+    herr_t ret;
+
+    if ( pass ) { /* turn file format latest off */
+
+	ret = H5Fset_latest_format(fid, FALSE);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "os_grp_n: H5Fset_latest_format() failed(1).";
+	}
+        HDassert(ret >= 0);
+    }
+
+    if ( pass ) {
+
+        gid = H5Gcreate2(fid, group_name, H5P_DEFAULT, H5P_DEFAULT, 
+                         H5P_DEFAULT);
+        if ( gid <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "os_grp_n: H5Gcreate2() failed.";
+        }
+        HDassert(gid > 0);
+    }
+
+    HDassert(nlinks > 0);
+
+    u = 0;
+    while ( ( pass ) && ( u < nlinks ) ) {
+
+        char linkname[32];
+
+        sprintf(linkname, "ln%d_%u", proc_num, u);
+
+        if(0 == (u % 2)) {
+
+            ret = H5Lcreate_soft(group_name, gid, linkname, H5P_DEFAULT, 
+                                 H5P_DEFAULT);
+            if ( ret < 0 ) {
+
+	        pass = FALSE;
+	        failure_mssg = "os_grp_n: H5Lcreate_soft() failed.";
+            }
+            HDassert(ret >= 0);
+        } /* end if */
+        else {
+
+            HDassert(1 == (u % 2));
+
+            ret = H5Lcreate_hard(fid, "/", gid, linkname, H5P_DEFAULT, 
+                                 H5P_DEFAULT);
+            if ( ret < 0 ) {
+
+	        pass = FALSE;
+	        failure_mssg = "os_grp_n: H5Lcreate_hard() failed.";
+            }
+            HDassert(ret >= 0);
+        } /* end else */
+
+	u++;
+
+    } /* end while */
+
+    if ( pass ) {
+
+        ret = H5Gclose(gid);
+
+        if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "os_grp_n: H5Gclose() failed.";
+        }
+        assert(ret >= 0);
+    }
+
+    if ( pass ) { /* turn file format latest on */
+
+	ret = H5Fset_latest_format(fid, TRUE);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "os_grp_n: H5Fset_latest_format() failed(2).";
+	}
+        HDassert(ret >= 0);
+    }
+
+    return;
+} /* os_grp_n() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    vrfy_os_grp_n
+ *
+ * Purpose:     Validate an "old style" group with 'nlinks' soft/hard
+ *              links in it.
+ *
+ *              If pass is false on entry, do nothing.
+ *
+ *              If an error is detected, set pass to FALSE, and set
+ *              failure_mssg to point to an appropriate error message.
+ *
+ * Return:      void
+ *
+ * Programmer:  John Mainzer
+ *              9/14/15
+ *
+ *-------------------------------------------------------------------------
+ */
+void
+vrfy_os_grp_n(hid_t fid, const char *group_name, int proc_num, unsigned nlinks)
+{
+    hid_t gid = -1;
+    hid_t gcpl = -1;
+    H5G_info_t grp_info;
+    unsigned crt_order_flags = 0;
+    unsigned u;
+    herr_t ret;
+
+    if ( pass ) {
+
+        gid = H5Gopen2(fid, group_name, H5P_DEFAULT);
+
+	if ( gid <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_os_grp_n: H5Gopen2() failed";
+	}
+        HDassert(gid > 0);
+    }
+
+    if ( pass ) {
+
+        gcpl = H5Gget_create_plist(gid);
+
+	if ( gcpl <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_os_grp_n: H5Gget_create_plist() failed";
+	}
+        HDassert(gcpl > 0);
+    }
+
+    if ( pass ) {
+
+        ret = H5Pget_link_creation_order(gcpl, &crt_order_flags);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_os_grp_n: H5Pget_link_creation_order";
+	}
+	else if ( 0 != crt_order_flags ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_os_grp_n: 0 != crt_order_flags";
+	}
+        HDassert(ret >= 0);
+        HDassert(0 == crt_order_flags);
+    }
+
+    if ( pass ) {
+
+        ret = H5Pclose(gcpl);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_os_grp_n: H5Pclose() failed";
+	}
+        HDassert(ret >= 0);
+    }
+
+    if ( pass ) {
+
+        memset(&grp_info, 0, sizeof(grp_info));
+
+        ret = H5Gget_info(gid, &grp_info);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_os_grp_n: H5Gget_info() failed";
+	}
+	else if ( H5G_STORAGE_TYPE_SYMBOL_TABLE != grp_info.storage_type ) {
+
+	    pass = FALSE;
+	    failure_mssg = 
+	"vrfy_os_grp_n: H5G_STORAGE_TYPE_SYMBOL_TABLE != grp_info.storage_type";
+	}
+	else if ( nlinks != grp_info.nlinks ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_os_grp_n: nlinks != grp_info.nlinks";
+	}
+	else if ( 0 != grp_info.max_corder ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_os_grp_n: 0 != grp_info.max_corder";
+	}
+	else if ( FALSE != grp_info.mounted ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_os_grp_n: FALSE != grp_info.mounted";
+	}
+        HDassert(ret >= 0);
+        HDassert(H5G_STORAGE_TYPE_SYMBOL_TABLE == grp_info.storage_type);
+        HDassert(nlinks == grp_info.nlinks);
+        HDassert(0 == grp_info.max_corder);
+        HDassert(false == grp_info.mounted);
+    }
+
+    u = 0;
+    while ( ( pass ) && ( u < nlinks ) ) {
+
+        H5L_info_t lnk_info;
+        char linkname[32];
+        htri_t link_exists;
+
+        sprintf(linkname, "ln%d_%u", proc_num, u);
+        link_exists = H5Lexists(gid, linkname, H5P_DEFAULT);
+
+	if ( link_exists < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_os_grp_n: H5Lexists() failed";
+        }
+        HDassert(link_exists >= 0);
+
+        memset(&lnk_info, 0, sizeof(grp_info));
+        ret = H5Lget_info(gid, linkname, &lnk_info, H5P_DEFAULT);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_os_grp_n: H5Lget_info() failed";
+        }
+	else if ( FALSE != lnk_info.corder_valid ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_os_grp_n: FALSE != lnk_info.corder_valid";
+        }
+	else if ( H5T_CSET_ASCII != lnk_info.cset ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_os_grp_n: H5T_CSET_ASCII != lnk_info.cset";
+        }
+        HDassert(ret >= 0);
+        HDassert(false == lnk_info.corder_valid);
+        HDassert(H5T_CSET_ASCII == lnk_info.cset);
+
+        if(0 == (u % 2)) {
+            char *slinkval;
+
+	    if ( H5L_TYPE_SOFT != lnk_info.type ) {
+
+	        pass = FALSE;
+	        failure_mssg = "vrfy_os_grp_n: H5L_TYPE_SOFT != lnk_info.type";
+            }
+	    else if ( (strlen(group_name) + 1) != lnk_info.u.val_size ) {
+
+	        pass = FALSE;
+	        failure_mssg = 
+	    "vrfy_os_grp_n: (strlen(group_name) + 1) != lnk_info.u.val_size";
+            }
+            HDassert(H5L_TYPE_SOFT == lnk_info.type);
+            HDassert((strlen(group_name) + 1) == lnk_info.u.val_size);
+
+            slinkval = (char *)malloc(lnk_info.u.val_size);
+
+	    if ( ! slinkval ) {
+
+	        pass = FALSE;
+	        failure_mssg = "vrfy_os_grp_n: malloc of slinkval failed";
+            }
+            HDassert(slinkval);
+
+            ret = H5Lget_val(gid, linkname, slinkval, lnk_info.u.val_size, 
+                             H5P_DEFAULT);
+
+	    if ( ret < 0 ) {
+
+	        pass = FALSE;
+	        failure_mssg = "vrfy_os_grp_n: H5Lget_val() failed";
+            }
+	    else if ( 0 != strcmp(slinkval, group_name) ) {
+
+	        pass = FALSE;
+	        failure_mssg = 
+		    "vrfy_os_grp_n: 0 != strcmp(slinkval, group_name)";
+            }
+            HDassert(ret >= 0);
+            HDassert(0 == strcmp(slinkval, group_name));
+
+            free(slinkval);
+        } /* end if */
+        else {
+            H5O_info_t root_oinfo;
+
+            HDassert(1 == (u % 2));
+
+	    if ( H5L_TYPE_HARD != lnk_info.type ) {
+
+	        pass = FALSE;
+	        failure_mssg = "vrfy_os_grp_n: H5L_TYPE_HARD != lnk_info.type";
+            }
+            HDassert(H5L_TYPE_HARD == lnk_info.type);
+
+            memset(&root_oinfo, 0, sizeof(root_oinfo));
+            ret = H5Oget_info(fid, &root_oinfo);
+
+	    if ( ret < 0 ) {
+
+	        pass = FALSE;
+	        failure_mssg = "vrfy_os_grp_n: H5Oget_info() failed.";
+            }
+	    else if ( root_oinfo.addr != lnk_info.u.address ) {
+
+	        pass = FALSE;
+	        failure_mssg = 
+		    "vrfy_os_grp_n: root_oinfo.addr != lnk_info.u.address";
+            }
+            HDassert(ret >= 0);
+            HDassert(root_oinfo.addr == lnk_info.u.address);
+        } /* end else */
+
+	u++;
+
+    } /* end while */
+
+    if ( pass ) {
+
+        ret = H5Gclose(gid);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_os_grp_n: H5Gclose() failed.";
+        }
+        HDassert(ret >= 0);
+    }
+
+    return;
+
+} /* vrfy_os_grp_n() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    ds_ctg_i
+ *
+ * Purpose:     Create a contiguous dataset w/int datatype.  Write data
+ *		to the data set or not as indicated by the write_data 
+ *		parameter.
+ *
+ *              If pass is false on entry, do nothing.
+ *
+ *              If an error is detected, set pass to FALSE, and set
+ *              failure_mssg to point to an appropriate error message.
+ *
+ * Return:      void
+ *
+ * Programmer:  John Mainzer
+ *              9/14/15
+ *
+ *-------------------------------------------------------------------------
+ */
+void 
+ds_ctg_i(hid_t fid, const char *dset_name, hbool_t write_data)
+{
+    int *wdata = NULL;
+    unsigned u;
+    hid_t dsid = -1;
+    hid_t sid = -1;
+    hsize_t dims[1] = {DSET_DIMS};
+    herr_t ret;
+
+    if ( pass ) {
+
+        sid = H5Screate_simple(1, dims, NULL);
+
+	if ( sid <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_ctg_i: H5Screate_simple() failed";
+        }
+        HDassert(sid > 0);
+    }
+
+    if ( pass ) {
+
+        dsid = H5Dcreate2(fid, dset_name, H5T_NATIVE_INT, sid, H5P_DEFAULT, 
+			  H5P_DEFAULT, H5P_DEFAULT);
+
+	if ( dsid <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_ctg_i: H5Dcreate2() failed";
+        }
+        HDassert(dsid > 0);
+    }
+
+    if ( pass ) {
+
+        ret = H5Sclose(sid);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_ctg_i: H5Sclose() failed";
+        }
+        HDassert(ret >= 0);
+    }
+
+    if ( ( pass ) && ( write_data ) ) {
+
+        wdata = (int *)malloc(sizeof(int) * DSET_DIMS);
+
+	if ( ! wdata ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_ctg_i: malloc of wdata failed.";
+        }
+        HDassert(wdata);
+    }
+
+    if ( ( pass ) && ( write_data ) ) {
+
+        for(u = 0; u < DSET_DIMS; u++)
+
+            wdata[u] = (int)u;
+
+        ret = H5Dwrite(dsid, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, 
+                       H5P_DEFAULT, wdata);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_ctg_i: H5Dwrite() failed.";
+        }
+        HDassert(ret >= 0);
+
+        free(wdata);
+    } 
+
+    if ( pass ) {
+
+        ret = H5Dclose(dsid);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_ctg_i: H5Dclose() failed";
+        }
+        HDassert(ret >= 0);
+    }
+
+    return;
+
+} /* ds_ctg_i */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    vrfy_ds_ctg_i
+ *
+ * Purpose:     Validate a contiguous datasets w/int datatypes. Validate 
+ *		data if indicated via the write_data parameter.
+ *
+ *              If pass is false on entry, do nothing.
+ *
+ *              If an error is detected, set pass to FALSE, and set
+ *              failure_mssg to point to an appropriate error message.
+ *
+ * Return:      void
+ *
+ * Programmer:  John Mainzer
+ *              9/14/15
+ *
+ *-------------------------------------------------------------------------
+ */
+void 
+vrfy_ds_ctg_i(hid_t fid, const char *dset_name, hbool_t write_data)
+{
+    int *rdata = NULL;
+    unsigned u;
+    hid_t dsid = -1;
+    hid_t sid = -1;
+    hid_t tid = -1;
+    hid_t dcpl = -1;
+    H5D_space_status_t allocation;
+    H5D_layout_t layout;
+    int ndims;
+    hsize_t dims[1], max_dims[1];
+    htri_t type_equal;
+    herr_t ret;
+
+    if ( pass ) {
+
+        dsid = H5Dopen2(fid, dset_name, H5P_DEFAULT);
+
+	if ( dsid <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_i: H5Dopen2() failed.";
+	}
+        HDassert(dsid > 0);
+    }
+
+    if ( pass ) {
+
+        sid = H5Dget_space(dsid);
+
+	if ( sid <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_i: H5Dget_space() failed.";
+	}
+        HDassert(sid > 0);
+    }
+
+    if ( pass ) {
+
+        ndims = H5Sget_simple_extent_ndims(sid);
+
+	if ( 1 != ndims ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_i: 1 != ndims";
+	}
+        HDassert(1 == ndims);
+    }
+
+    if ( pass ) {
+
+        ret = H5Sget_simple_extent_dims(sid, dims, max_dims);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_i: H5Sget_simple_extent_dims() failed";
+	}
+	else if ( DSET_DIMS != dims[0] ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_i: DSET_DIMS != dims[0]";
+	}
+	else if ( DSET_DIMS != max_dims[0] ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_i: DSET_DIMS != max_dims[0]";
+	}
+        HDassert(ret >= 0);
+        HDassert(DSET_DIMS == dims[0]);
+        HDassert(DSET_DIMS == max_dims[0]);
+    }
+
+    if ( pass ) {
+
+        ret = H5Sclose(sid);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_i: H5Sclose() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    if ( pass ) {
+
+        tid = H5Dget_type(dsid);
+
+	if ( tid <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_i: H5Dget_type() failed.";
+	}
+        HDassert(tid > 0);
+    }
+
+    if ( pass ) {
+
+        type_equal = H5Tequal(tid, H5T_NATIVE_INT);
+
+	if ( 1 != type_equal ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_i: type not H5T_NATIVE_INT";
+	}
+        HDassert(1 == type_equal);
+    }
+
+    if ( pass ) {
+
+        ret = H5Tclose(tid);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_i: H5Tclose() failed.";
+	}
+        assert(ret >= 0);
+    }
+
+    if ( pass ) {
+
+        ret = H5Dget_space_status(dsid, &allocation);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_i: H5Dget_space_status() failed.";
+	}
+	else if ( write_data && ( allocation != H5D_SPACE_STATUS_ALLOCATED ) ) {
+
+	    pass = FALSE;
+	    failure_mssg = 
+	"vrfy_ds_ctg_i: write_data && allocation != H5D_SPACE_STATUS_ALLOCATED";
+	}
+	else if ( !write_data && 
+                  ( allocation != H5D_SPACE_STATUS_NOT_ALLOCATED ) ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_i: !write_data && allocation != H5D_SPACE_STATUS_NOT_ALLOCATED";
+	}
+        HDassert(ret >= 0);
+        HDassert((write_data && allocation == H5D_SPACE_STATUS_ALLOCATED) ||
+                 (!write_data && allocation == H5D_SPACE_STATUS_NOT_ALLOCATED));
+    }
+
+    if ( pass ) {
+
+        dcpl = H5Dget_create_plist(dsid);
+
+	if ( dcpl <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_i: H5Dget_create_plist() failed.";
+	}
+        HDassert(dcpl > 0);
+    }
+
+    if ( pass ) {
+
+        layout = H5Pget_layout(dcpl);
+
+	if ( H5D_CONTIGUOUS != layout ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_i: H5D_CONTIGUOUS != layout";
+	}
+        HDassert(H5D_CONTIGUOUS == layout);
+    }
+
+    if ( pass ) {
+
+        ret = H5Pclose(dcpl);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_i: H5Pclose() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    if ( ( pass ) && ( write_data ) ) {
+
+        rdata = (int *)malloc(sizeof(int) * DSET_DIMS);
+
+	if ( ! rdata ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_i: malloc of rdata failed.";
+	}
+        HDassert(rdata);
+    }
+
+    if ( ( pass ) && ( write_data ) ) {
+
+        ret = H5Dread(dsid, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, 
+                      H5P_DEFAULT, rdata);
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_i: H5Dread() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    if ( ( pass ) && ( write_data ) ) {
+
+        for(u = 0; u < DSET_DIMS; u++) {
+
+	    if ( (int)u != rdata[u] ) {
+
+		pass = FALSE;
+		failure_mssg = "vrfy_ds_ctg_i: u != rdata[u].";
+		break;
+	    }
+            HDassert((int)u == rdata[u]);
+	}
+
+        free(rdata);
+    } /* end if */
+
+    if ( pass ) {
+
+        ret = H5Dclose(dsid);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_i: H5Dclose() failed";
+	}
+        HDassert(ret >= 0);
+    }
+
+    return;
+
+} /* vrfy_ds_ctg_i() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    ds_chk_i
+ *
+ * Purpose:     Create a chunked dataset w/int datatype.  Write data
+ *		to the data set or not as indicated by the write_data 
+ *		parameter.
+ *
+ *              If pass is false on entry, do nothing.
+ *
+ *              If an error is detected, set pass to FALSE, and set
+ *              failure_mssg to point to an appropriate error message.
+ *
+ * Return:      void
+ *
+ * Programmer:  John Mainzer
+ *              9/14/15
+ *
+ *-------------------------------------------------------------------------
+ */
+void 
+ds_chk_i(hid_t fid, const char *dset_name, hbool_t write_data)
+{
+    int *wdata = NULL;
+    unsigned u;
+    hid_t dsid = -1;
+    hid_t dcpl = -1;
+    hid_t sid = -1;
+    hsize_t dims[1] = {DSET_DIMS};
+    hsize_t chunk_dims[1] = {DSET_CHUNK_DIMS};
+    herr_t ret;
+
+    if ( pass ) {
+
+        sid = H5Screate_simple(1, dims, NULL);
+
+	if ( sid <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_chk_i: H5Screate_simple() failed.";
+	}
+        HDassert(sid > 0);
+    }
+
+    if ( pass ) {
+
+        dcpl = H5Pcreate(H5P_DATASET_CREATE);
+
+	if ( dcpl <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_chk_i: H5Pcreate() failed.";
+	}
+        HDassert(dcpl > 0);
+    }
+
+    if ( pass ) {
+
+        ret = H5Pset_chunk(dcpl, 1, chunk_dims);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_chk_i: H5Pset_chunk() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    if ( pass ) {
+
+        dsid = H5Dcreate2(fid, dset_name, H5T_NATIVE_INT, sid, 
+                          H5P_DEFAULT, dcpl, H5P_DEFAULT);
+
+	if ( dsid <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_chk_i: H5Dcreate2() failed";
+	}
+        HDassert(dsid > 0);
+    }
+
+    if ( pass ) {
+
+        ret = H5Pclose(dcpl);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_chk_i: H5Pclose() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    if ( pass ) {
+
+        ret = H5Sclose(sid);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_chk_i: H5Sclose() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    if ( ( pass ) && ( write_data ) ) {
+
+        wdata = (int *)malloc(sizeof(int) * DSET_DIMS);
+
+	if ( ! wdata ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_chk_i: malloc of wdata failed.";
+	}
+        HDassert(wdata);
+    }
+
+    if ( ( pass ) && ( write_data ) ) {
+
+        for(u = 0; u < DSET_DIMS; u++)
+            wdata[u] = (int)u;
+
+        ret = H5Dwrite(dsid, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, 
+                       H5P_DEFAULT, wdata);
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_chk_i: H5Dwrite() failed.";
+	}
+        HDassert(ret >= 0);
+
+        free(wdata);
+    } /* end if */
+
+    if ( pass ) {
+
+        ret = H5Dclose(dsid);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_chk_i: H5Dclose() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    return;
+
+} /* ds_chk_i */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    vrfy_ds_chk_i
+ *
+ * Purpose:     Validate a chunked datasets w/int datatypes. Validate 
+ *		data if indicated via the write_data parameter.
+ *
+ *              If pass is false on entry, do nothing.
+ *
+ *              If an error is detected, set pass to FALSE, and set
+ *              failure_mssg to point to an appropriate error message.
+ *
+ * Return:      void
+ *
+ * Programmer:  John Mainzer
+ *              9/14/15
+ *
+ *-------------------------------------------------------------------------
+ */
+void 
+vrfy_ds_chk_i(hid_t fid, const char *dset_name, hbool_t write_data)
+{
+    int *rdata = NULL;
+    unsigned u;
+    hid_t dsid = -1;
+    hid_t sid = -1;
+    hid_t tid = -1;
+    hid_t dcpl = -1;
+    H5D_space_status_t allocation;
+    H5D_layout_t layout;
+    int ndims;
+    hsize_t dims[1], max_dims[1], chunk_dims[1];
+    htri_t type_equal;
+    herr_t ret;
+
+    if ( pass ) {
+
+        dsid = H5Dopen2(fid, dset_name, H5P_DEFAULT);
+
+	if ( dsid <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_chk_i: H5Dopen2() failed.";
+	}
+        HDassert(dsid > 0);
+    }
+
+    if ( pass ) {
+
+        sid = H5Dget_space(dsid);
+
+	if ( sid <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_chk_i: H5Dget_space() failed.";
+	}
+        HDassert(sid > 0);
+    }
+
+    if ( pass ) {
+
+        ndims = H5Sget_simple_extent_ndims(sid);
+
+	if ( 1 != ndims ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_chk_i: 1 != ndims";
+	}
+        HDassert(1 == ndims);
+    }
+
+    if ( pass ) {
+
+        ret = H5Sget_simple_extent_dims(sid, dims, max_dims);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_chk_i: H5Sget_simple_extent_dims() failed";
+	}
+	else if ( DSET_DIMS != dims[0] ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_chk_i: DSET_DIMS != dims[0]";
+	}
+	else if ( DSET_DIMS != max_dims[0] ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_chk_i: DSET_DIMS != max_dims[0]";
+	}
+        HDassert(ret >= 0);
+        HDassert(DSET_DIMS == dims[0]);
+        HDassert(DSET_DIMS == max_dims[0]);
+    }
+
+    if ( pass ) {
+
+        ret = H5Sclose(sid);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_chk_i: H5Sclose() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    if ( pass ) {
+
+        tid = H5Dget_type(dsid);
+
+	if ( tid <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_chk_i: H5Dget_type() failed.";
+	}
+        HDassert(tid > 0);
+    }
+
+    if ( pass ) {
+
+        type_equal = H5Tequal(tid, H5T_NATIVE_INT);
+
+	if ( 1 != type_equal ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_chk_i: tid != H5T_NATIVE_INT";
+	}
+        HDassert(1 == type_equal);
+    }
+
+    if ( pass ) {
+
+        ret = H5Tclose(tid);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_chk_i: H5Tclose() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    if ( pass ) {
+
+        ret = H5Dget_space_status(dsid, &allocation);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_chk_i: H5Dget_space_status() failed.";
+	}
+	else if ( write_data && ( allocation != H5D_SPACE_STATUS_ALLOCATED ) ) {
+
+	    pass = FALSE;
+	    failure_mssg = 
+	"vrfy_ds_chk_i: write_data && allocation != H5D_SPACE_STATUS_ALLOCATED";
+	}
+	else if ( !write_data && 
+                  ( allocation != H5D_SPACE_STATUS_NOT_ALLOCATED ) ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_chk_i: !write_data && allocation != H5D_SPACE_STATUS_NOT_ALLOCATED";
+	}
+        HDassert(ret >= 0);
+        HDassert((write_data && allocation == H5D_SPACE_STATUS_ALLOCATED) ||
+                 (!write_data && allocation == H5D_SPACE_STATUS_NOT_ALLOCATED));
+    }
+
+    if ( pass ) {
+
+        dcpl = H5Dget_create_plist(dsid);
+
+	if ( dcpl <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_chk_i: H5Dget_create_plist() failed.";
+	}
+        HDassert(dcpl > 0);
+    }
+
+    if ( pass ) {
+
+        layout = H5Pget_layout(dcpl);
+
+	if ( H5D_CHUNKED != layout ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_chk_i: H5D_CHUNKED != layout";
+	}
+        HDassert(H5D_CHUNKED == layout);
+    }
+
+    if ( pass ) {
+
+        ret = H5Pget_chunk(dcpl, 1, chunk_dims);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_chk_i: H5Pget_chunk";
+	}
+	else if ( DSET_CHUNK_DIMS != chunk_dims[0] ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_chk_i: ";
+	}
+        HDassert(ret >= 0);
+        HDassert(DSET_CHUNK_DIMS == chunk_dims[0]);
+    }
+
+    if ( pass ) {
+
+        ret = H5Pclose(dcpl);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_chk_i: H5Pclose() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    if ( ( pass ) && ( write_data ) ) {
+
+        rdata = (int *)malloc(sizeof(int) * DSET_DIMS);
+
+	if ( ! rdata ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_chk_i: malloc of rdata failed.";
+	}
+        HDassert(rdata);
+    }
+
+    if ( ( pass ) && ( write_data ) ) {
+
+        ret = H5Dread(dsid, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, 
+                      rdata);
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_chk_i: H5Dread() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    if ( ( pass ) && ( write_data ) ) {
+
+        for(u = 0; u < DSET_DIMS; u++) {
+
+	    if ( (int)u != rdata[u] ) {
+
+	        pass = FALSE;
+	        failure_mssg = "vrfy_ds_chk_i: u != rdata[u]";
+		break;
+	    }
+            HDassert((int)u == rdata[u]);
+        }
+
+        free(rdata);
+    } /* end if */
+
+
+    if ( pass ) {
+
+        ret = H5Dclose(dsid);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_chk_i: H5Dclose() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    return;
+
+} /* vrfy_ds_chk_i() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    ds_cpt_i
+ *
+ * Purpose:     Create a compact dataset w/int datatype.  Write data
+ *		to the data set or not as indicated by the write_data 
+ *		parameter.
+ *
+ *              If pass is false on entry, do nothing.
+ *
+ *              If an error is detected, set pass to FALSE, and set
+ *              failure_mssg to point to an appropriate error message.
+ *
+ * Return:      void
+ *
+ * Programmer:  John Mainzer
+ *              9/14/15
+ *
+ *-------------------------------------------------------------------------
+ */
+void 
+ds_cpt_i(hid_t fid, const char *dset_name, hbool_t write_data)
+{
+    int *wdata = NULL;
+    unsigned u;
+    hid_t dsid = -1;
+    hid_t dcpl = -1;
+    hid_t sid = -1;
+    hsize_t dims[1] = {DSET_COMPACT_DIMS};
+    herr_t ret;
+
+    if ( pass ) {
+
+        sid = H5Screate_simple(1, dims, NULL);
+
+	if ( sid <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_cpt_i: H5Screate_simple() failed.";
+	}
+        HDassert(sid > 0);
+    }
+
+    if ( pass ) {
+
+        dcpl = H5Pcreate(H5P_DATASET_CREATE);
+
+	if ( dcpl <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_cpt_i: H5Pcreate() failed.";
+	}
+        HDassert(dcpl > 0);
+    }
+
+    if ( pass ) {
+
+        ret = H5Pset_layout(dcpl, H5D_COMPACT);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_cpt_i: H5Pset_layout() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    if ( pass ) {
+
+        dsid = H5Dcreate2(fid, dset_name, H5T_NATIVE_INT, sid, 
+                          H5P_DEFAULT, dcpl, H5P_DEFAULT);
+
+	if ( dsid <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_cpt_i: H5Dcreate2() failed.";
+	}
+        HDassert(dsid > 0);
+    }
+
+    if ( pass ) {
+
+        ret = H5Pclose(dcpl);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_cpt_i: H5Pclose() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    if ( pass ) {
+
+        ret = H5Sclose(sid);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_cpt_i: H5Sclose() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    if ( ( pass ) && ( write_data ) ) {
+
+        wdata = (int *)malloc(sizeof(int) * DSET_COMPACT_DIMS);
+
+	if ( ! wdata ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_cpt_i: malloc of wdata failed.";
+	}
+        HDassert(wdata);
+    }
+
+    if ( ( pass ) && ( write_data ) ) {
+
+        for(u = 0; u < DSET_COMPACT_DIMS; u++)
+            wdata[u] = (int)u;
+
+        ret = H5Dwrite(dsid, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, 
+                       H5P_DEFAULT, wdata);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_cpt_i: H5Dwrite() failed.";
+	}
+        HDassert(ret >= 0);
+
+        free(wdata);
+    } /* end if */
+
+    if ( pass ) {
+
+        ret = H5Dclose(dsid);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_cpt_i: H5Dclose() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    return;
+
+} /* ds_cpt_i() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    vrfy_ds_cpt_i
+ *
+ * Purpose:     Validate a compact datasets w/int datatypes. Validate 
+ *		data if indicated via the write_data parameter.
+ *
+ *              If pass is false on entry, do nothing.
+ *
+ *              If an error is detected, set pass to FALSE, and set
+ *              failure_mssg to point to an appropriate error message.
+ *
+ * Return:      void
+ *
+ * Programmer:  John Mainzer
+ *              9/14/15
+ *
+ *-------------------------------------------------------------------------
+ */
+void 
+vrfy_ds_cpt_i(hid_t fid, const char *dset_name, hbool_t write_data)
+{
+    int *rdata = NULL;
+    unsigned u;
+    hid_t dsid = -1;
+    hid_t sid = -1;
+    hid_t tid = -1;
+    hid_t dcpl = -1;
+    H5D_space_status_t allocation;
+    H5D_layout_t layout;
+    int ndims;
+    hsize_t dims[1], max_dims[1];
+    htri_t type_equal;
+    herr_t ret;
+
+    if ( pass ) {
+
+        dsid = H5Dopen2(fid, dset_name, H5P_DEFAULT);
+
+        if ( dsid <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_cpt_i: H5Dopen2() failed.";
+	}
+        HDassert(dsid > 0);
+    }
+
+    if ( pass ) {
+
+        sid = H5Dget_space(dsid);
+
+        if ( sid <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_cpt_i: H5Dget_space() failed.";
+	}
+        HDassert(sid > 0);
+    }
+
+    if ( pass ) {
+
+        ndims = H5Sget_simple_extent_ndims(sid);
+
+        if ( 1 != ndims ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_cpt_i: 1 != ndims";
+	}
+        HDassert(1 == ndims);
+    }
+
+    if ( pass ) {
+
+        ret = H5Sget_simple_extent_dims(sid, dims, max_dims);
+
+        if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_cpt_i: H5Sget_simple_extent_dims() failed";
+	}
+        else if ( DSET_COMPACT_DIMS != dims[0] ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_cpt_i: DSET_COMPACT_DIMS != dims[0]";
+	}
+        else if ( DSET_COMPACT_DIMS != max_dims[0] ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_cpt_i: DSET_COMPACT_DIMS != max_dims[0]";
+	}
+        HDassert(ret >= 0);
+        HDassert(DSET_COMPACT_DIMS == dims[0]);
+        HDassert(DSET_COMPACT_DIMS == max_dims[0]);
+    }
+
+    if ( pass ) {
+
+        ret = H5Sclose(sid);
+
+        if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_cpt_i: H5Sclose() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    if ( pass ) {
+
+        tid = H5Dget_type(dsid);
+
+        if ( tid <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_cpt_i: H5Dget_type() failed.";
+	}
+        HDassert(tid > 0);
+    }
+
+    if ( pass ) {
+
+        type_equal = H5Tequal(tid, H5T_NATIVE_INT);
+
+        if ( 1 != type_equal ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_cpt_i: type != H5T_NATIVE_INT";
+	}
+        HDassert(1 == type_equal);
+    }
+
+    if ( pass ) {
+
+        ret = H5Tclose(tid);
+
+        if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_cpt_i: H5Tclose() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    if ( pass ) {
+
+        ret = H5Dget_space_status(dsid, &allocation);
+
+        if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_cpt_i: H5Dget_space_status() failed.";
+	}
+        else if ( H5D_SPACE_STATUS_ALLOCATED != allocation ) {
+
+	    pass = FALSE;
+	    failure_mssg = 
+	        "vrfy_ds_cpt_i: H5D_SPACE_STATUS_ALLOCATED != allocation";
+	}
+        HDassert(ret >= 0);
+        HDassert(H5D_SPACE_STATUS_ALLOCATED == allocation);
+    }
+
+    if ( pass ) {
+
+        dcpl = H5Dget_create_plist(dsid);
+
+        if ( dcpl <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_cpt_i: H5Dget_create_plist() failed.";
+	}
+        HDassert(dcpl > 0);
+    }
+
+    if ( pass ) {
+
+        layout = H5Pget_layout(dcpl);
+
+        if ( H5D_COMPACT != layout ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_cpt_i: H5D_COMPACT != layout";
+	}
+        HDassert(H5D_COMPACT == layout);
+    }
+
+    if ( pass ) {
+
+        ret = H5Pclose(dcpl);
+
+        if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_cpt_i: H5Pclose() failed.";
+	}
+        HDassert(ret >= 0);
+     }
+
+    if ( ( pass ) && ( write_data ) ) {
+
+        rdata = (int *)malloc(sizeof(int) * DSET_COMPACT_DIMS);
+
+        if ( ! rdata ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_cpt_i: malloc of rdata failed.";
+	}
+        HDassert(rdata);
+    }
+
+    if ( ( pass ) && ( write_data ) ) {
+
+        ret = H5Dread(dsid, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, 
+                      H5P_DEFAULT, rdata);
+        if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_cpt_i: H5Dread() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    if ( ( pass ) && ( write_data ) ) {
+
+        for(u = 0; u < DSET_COMPACT_DIMS; u++) {
+
+            if ( (int)u != rdata[u] ) {
+
+	        pass = FALSE;
+	        failure_mssg = "vrfy_ds_cpt_i: (int)u != rdata[u]";
+		break;
+	    }
+            HDassert((int)u == rdata[u]);
+        }
+
+        free(rdata);
+    } /* end if */
+
+    if ( pass ) {
+
+        ret = H5Dclose(dsid);
+
+        if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_cpt_i: H5Dclose() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    return;
+
+} /* vrfy_ds_cpt_i() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    ds_ctg_v
+ *
+ * Purpose:     Create a contiguous dataset w/variable-length datatype.  
+ *		Write data to the data set or not as indicated by the 
+ *		write_data parameter.
+ *
+ *              If pass is false on entry, do nothing.
+ *
+ *              If an error is detected, set pass to FALSE, and set
+ *              failure_mssg to point to an appropriate error message.
+ *
+ * Return:      void
+ *
+ * Programmer:  John Mainzer
+ *              9/14/15
+ *
+ *-------------------------------------------------------------------------
+ */
+void 
+ds_ctg_v(hid_t fid, const char *dset_name, hbool_t write_data)
+{
+    hid_t dsid = -1;
+    hid_t sid = -1;
+    hid_t tid = -1;
+    hsize_t dims[1] = {DSET_SMALL_DIMS};
+    herr_t ret;
+    hvl_t *wdata = NULL;
+    unsigned u;
+
+    if ( pass ) {
+
+        sid = H5Screate_simple(1, dims, NULL);
+
+	if ( sid <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_ctg_v: H5Screate_simple";
+	}
+        HDassert(sid > 0);
+    }
+
+    if ( pass ) {
+
+        tid = H5Tvlen_create(H5T_NATIVE_INT);
+
+	if ( tid <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_ctg_v: H5Tvlen_create() failed.";
+	}
+        HDassert(tid > 0);
+    }
+
+    if ( pass ) {
+
+        dsid = H5Dcreate2(fid, dset_name, tid, sid, H5P_DEFAULT, 
+                          H5P_DEFAULT, H5P_DEFAULT);
+
+	if ( dsid <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_ctg_v: H5Dcreate2() failed.";
+	}
+        HDassert(dsid > 0);
+    }
+
+    if ( ( pass ) && ( write_data ) ) {
+
+        wdata = (hvl_t *)malloc(sizeof(hvl_t) * DSET_SMALL_DIMS);
+
+	if ( ! wdata ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_ctg_v: malloc of wdata failed.";
+	}
+        HDassert(wdata);
+    }
+
+    if ( ( pass ) && ( write_data ) ) {
+
+        for(u = 0; u < DSET_SMALL_DIMS; u++) {
+
+            int *tdata;
+            unsigned len;
+            unsigned v;
+
+            len = (u % 10) + 1;
+            tdata = (int *)malloc(sizeof(int) * len);
+
+	    if ( !tdata ) {
+
+	        pass = FALSE;
+	        failure_mssg = "ds_ctg_v: malloc of tdata failed.";
+		break;
+	    }
+            HDassert(tdata);
+
+            for(v = 0; v < len; v++)
+                tdata[v] = (int)(u + v);
+
+           wdata[u].len = len;
+           wdata[u].p = tdata;
+        } /* end for */
+    }
+
+    if ( ( pass ) && ( write_data ) ) {
+
+        ret = H5Dwrite(dsid, tid, H5S_ALL, H5S_ALL, H5P_DEFAULT, wdata);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_ctg_v: H5Dwrite() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    if ( ( pass ) && ( write_data ) ) {
+
+        ret = H5Dvlen_reclaim(tid, sid, H5P_DEFAULT, wdata);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_ctg_v: H5Dvlen_reclaim() failed.";
+	}
+        HDassert(ret >= 0);
+
+        free(wdata);
+
+    } /* end if */
+
+    if ( pass ) {
+
+        ret = H5Sclose(sid);
+
+	if ( sid < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_ctg_v: H5Sclose() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    if ( pass ) {
+
+        ret = H5Tclose(tid);
+
+	if ( tid < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_ctg_v: H5Tclose() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    if ( pass ) {
+
+        ret = H5Dclose(dsid);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "ds_ctg_v: H5Dclose() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    return;
+
+} /* ds_ctg_v() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    vrfy_ds_ctg_v
+ *
+ * Purpose:     Validate a contiguous datasets w/variable-length datatypes. 
+ *		Validate data if indicated via the write_data parameter.
+ *
+ *              If pass is false on entry, do nothing.
+ *
+ *              If an error is detected, set pass to FALSE, and set
+ *              failure_mssg to point to an appropriate error message.
+ *
+ * Return:      void
+ *
+ * Programmer:  John Mainzer
+ *              9/14/15
+ *
+ *-------------------------------------------------------------------------
+ */
+void 
+vrfy_ds_ctg_v(hid_t fid, const char *dset_name, hbool_t write_data)
+{
+    hid_t dsid = -1;
+    hid_t sid = -1;
+    hid_t tid = -1;
+    hid_t tmp_tid = -1;
+    hid_t dcpl = -1;
+    H5D_space_status_t allocation;
+    H5D_layout_t layout;
+    int ndims;
+    hsize_t dims[1], max_dims[1];
+    htri_t type_equal;
+    hvl_t *rdata = NULL;
+    unsigned u;
+    herr_t ret;
+
+    if ( pass ) {
+
+        dsid = H5Dopen2(fid, dset_name, H5P_DEFAULT);
+
+	if ( dsid <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_v: H5Dopen2() failed.";
+	}
+        HDassert(dsid > 0);
+    }
+
+    if ( pass ) {
+
+        sid = H5Dget_space(dsid);
+
+	if ( sid <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_v: H5Dget_space() failed";
+	}
+        HDassert(sid > 0);
+    }
+
+    if ( pass ) {
+
+        ndims = H5Sget_simple_extent_ndims(sid);
+
+	if ( 1 != ndims ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_v: 1 != ndims";
+	}
+        HDassert(1 == ndims);
+    }
+
+    if ( pass ) {
+
+        ret = H5Sget_simple_extent_dims(sid, dims, max_dims);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_v: H5Sget_simple_extent_dims() failed.";
+	}
+	else if ( DSET_SMALL_DIMS != dims[0] ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_v: DSET_SMALL_DIMS != dims[0]";
+	}
+	else if ( DSET_SMALL_DIMS != max_dims[0] ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_v: DSET_SMALL_DIMS != max_dims[0]";
+	}
+        HDassert(ret >= 0);
+        HDassert(DSET_SMALL_DIMS == dims[0]);
+        HDassert(DSET_SMALL_DIMS == max_dims[0]);
+    }
+
+    if ( pass ) {
+
+        tid = H5Dget_type(dsid);
+
+	if ( tid <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_v: H5Dget_type() failed.";
+	}
+        HDassert(tid > 0);
+    }
+
+    if ( pass ) {
+
+        tmp_tid = H5Tvlen_create(H5T_NATIVE_INT);
+
+	if ( tmp_tid <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_v: H5Tvlen_create() failed.";
+	}
+        HDassert(tmp_tid > 0);
+    }
+
+    if ( pass ) {
+
+        type_equal = H5Tequal(tid, tmp_tid);
+
+	if ( 1 != type_equal ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_v: type != vlen H5T_NATIVE_INT";
+	}
+        HDassert(1 == type_equal);
+    }
+
+    if ( pass ) {
+
+        ret = H5Tclose(tmp_tid);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_v: H5Tclose() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    if ( pass ) {
+
+        ret = H5Dget_space_status(dsid, &allocation);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_v: H5Dget_space_status() failed";
+	}
+	else if ( write_data && (allocation != H5D_SPACE_STATUS_ALLOCATED) ) {
+
+	    pass = FALSE;
+	    failure_mssg = 
+	"vrfy_ds_ctg_v: write_data && allocation != H5D_SPACE_STATUS_ALLOCATED";
+	}
+	else if ( !write_data && 
+                  ( allocation != H5D_SPACE_STATUS_NOT_ALLOCATED ) ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_v: !write_data && allocation != H5D_SPACE_STATUS_NOT_ALLOCATED";
+	}
+        HDassert(ret >= 0);
+        HDassert((write_data && allocation == H5D_SPACE_STATUS_ALLOCATED) ||
+                 (!write_data && allocation == H5D_SPACE_STATUS_NOT_ALLOCATED));
+    }
+
+    if ( pass ) {
+
+        dcpl = H5Dget_create_plist(dsid);
+
+	if ( dcpl <= 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_v: H5Dget_create_plist() failed.";
+	}
+        HDassert(dcpl > 0);
+    }
+
+    if ( pass ) {
+
+        layout = H5Pget_layout(dcpl);
+
+	if ( H5D_CONTIGUOUS != layout ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_v: H5D_CONTIGUOUS != layout";
+	}
+        HDassert(H5D_CONTIGUOUS == layout);
+    }
+
+    if ( pass ) {
+
+        ret = H5Pclose(dcpl);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_v: H5Pclose() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    if ( ( pass ) && ( write_data ) ) {
+
+        rdata = (hvl_t *)malloc(sizeof(hvl_t) * DSET_SMALL_DIMS);
+
+	if ( !rdata ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_v: malloc of rdata failed.";
+	}
+        HDassert(rdata);
+    }
+
+    if ( ( pass ) && ( write_data ) ) {
+
+        ret = H5Dread(dsid, tid, H5S_ALL, H5S_ALL, H5P_DEFAULT, rdata);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_v: H5Dread() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    if ( ( pass ) && ( write_data ) ) {
+
+        for(u = 0; u < DSET_SMALL_DIMS; u++) {
+            unsigned len;
+            unsigned v;
+
+            len = (unsigned)rdata[u].len;
+            for(v = 0; v < len; v++) {
+                int *tdata = (int *)rdata[u].p;
+
+	        if ( !tdata ) {
+
+	            pass = FALSE;
+	            failure_mssg = "vrfy_ds_ctg_v: !tdata";
+		    break;
+	        }
+		else if ( (int)(u + v) != tdata[v] ) {
+
+	            pass = FALSE;
+	            failure_mssg = "vrfy_ds_ctg_v: (int)(u + v) != tdata[v]";
+		    break;
+	        }
+                HDassert(tdata);
+                HDassert((int)(u + v) == tdata[v]);
+            } /* end for */
+        } /* end for */
+    }
+
+    if ( ( pass ) && ( write_data ) ) {
+
+        ret = H5Dvlen_reclaim(tid, sid, H5P_DEFAULT, rdata);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_v: H5Dvlen_reclaim() failed.";
+	}
+        HDassert(ret >= 0);
+
+        free(rdata);
+    } /* end if */
+
+    if ( pass ) {
+
+        ret = H5Sclose(sid);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_v: H5Sclose() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    if ( pass ) {
+
+        ret = H5Tclose(tid);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_v: H5Tclose() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    if ( pass ) {
+
+        ret = H5Dclose(dsid);
+
+	if ( ret < 0 ) {
+
+	    pass = FALSE;
+	    failure_mssg = "vrfy_ds_ctg_v: H5Dclose() failed.";
+	}
+        HDassert(ret >= 0);
+    }
+
+    return;
+
+} /* vrfy_ds_ctg_v() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    create_zoo
+ *
+ * Purpose:     Given the path to a group, construct a variety of HDF5
+ *              data sets, groups, and other objects selected so as to
+ *              include instances of all on disk data structures used
+ *              in the HDF5 library.
+ *
+ *              If pass is false on entry, do nothing.
+ *
+ *              If an error is detected, set pass to FALSE, and set
+ *              failure_mssg to point to an appropriate error message.
+ *
+ *              This function was initially created to assist in testing
+ *              the cache image feature of the metadata cache.  Thus, it
+ *              only concerns itself with the version 2 superblock, and
+ *              on disk structures that can occur with this version of
+ *              the superblock.
+ *
+ *              Note the associated validate_zoo() function.
+ *
+ * Return:      void
+ *
+ * Programmer:  John Mainzer
+ *              9/14/15
+ *
+ *-------------------------------------------------------------------------
+ */
+
+void
+create_zoo(hid_t fid, const char *base_path, int proc_num)
+{
+    char full_path[1024];
+
+    HDassert(base_path);
+
+    /* Add & verify an empty "new style" group */
+    if ( pass ) {
+        sprintf(full_path, "%s/A", base_path);
+        HDassert(strlen(full_path) < 1024);
+        ns_grp_0(fid, full_path);
+    }
+
+    if ( pass ) {
+        sprintf(full_path, "%s/A", base_path);
+        HDassert(strlen(full_path) < 1024);
+        vrfy_ns_grp_0(fid, full_path);
+    }
+
+    /* Add & verify a compact "new style" group (3 link messages) */
+    if ( pass ) {
+	sprintf(full_path, "%s/B", base_path);
+        HDassert(strlen(full_path) < 1024);
+        ns_grp_c(fid, full_path, 3);
+    }
+
+    if ( pass ) {
+	sprintf(full_path, "%s/B", base_path);
+        HDassert(strlen(full_path) < 1024);
+        vrfy_ns_grp_c(fid, full_path, 3);
+    }
+
+    /* Add & verify a dense "new style" group (w/300 links, in v2 B-tree & 
+     * fractal heap)
+     */
+    if ( pass ) {
+	sprintf(full_path, "%s/C", base_path);
+        HDassert(strlen(full_path) < 1024);
+        ns_grp_d(fid, full_path, 300);
+    }
+
+    if ( pass ) {
+	sprintf(full_path, "%s/C", base_path);
+        HDassert(strlen(full_path) < 1024);
+        vrfy_ns_grp_d(fid, full_path, 300);
+    }
+
+    /* Add & verify an empty "old style" group to file */
+    if ( pass ) {
+        sprintf(full_path, "%s/D", base_path);
+        HDassert(strlen(full_path) < 1024);
+        os_grp_0(fid, full_path);
+    }
+
+    if ( pass ) {
+        sprintf(full_path, "%s/D", base_path);
+        HDassert(strlen(full_path) < 1024);
+        vrfy_os_grp_0(fid, full_path);
+    }
+
+    /* Add & verify an "old style" group (w/300 links, in v1 B-tree & 
+     * local heap) to file 
+     */
+    if ( pass ) {
+        sprintf(full_path, "%s/E", base_path);
+        HDassert(strlen(full_path) < 1024);
+        os_grp_n(fid, full_path, proc_num, 300);
+    }
+
+    if ( pass ) {
+        sprintf(full_path, "%s/E", base_path);
+        HDassert(strlen(full_path) < 1024);
+        vrfy_os_grp_n(fid, full_path, proc_num, 300);
+    }
+
+    /* Add & verify a contiguous dataset w/integer datatype (but no data) 
+     * to file 
+     */
+    if ( pass ) {
+        sprintf(full_path, "%s/F", base_path);
+        HDassert(strlen(full_path) < 1024);
+        ds_ctg_i(fid, full_path, FALSE);
+    }
+
+    if ( pass ) {
+        sprintf(full_path, "%s/F", base_path);
+        HDassert(strlen(full_path) < 1024);
+        vrfy_ds_ctg_i(fid, full_path, FALSE);
+    }
+
+    /* Add & verify a contiguous dataset w/integer datatype (with data) 
+     * to file 
+     */
+    if ( pass ) {
+        sprintf(full_path, "%s/G", base_path);
+        HDassert(strlen(full_path) < 1024);
+        ds_ctg_i(fid, full_path, TRUE);
+    }
+
+    if ( pass ) {
+        sprintf(full_path, "%s/G", base_path);
+        HDassert(strlen(full_path) < 1024);
+        vrfy_ds_ctg_i(fid, full_path, TRUE);
+    }
+
+    /* Add & verify a chunked dataset w/integer datatype (but no data) 
+     * to file 
+     */
+    if ( pass ) {
+        sprintf(full_path, "%s/H", base_path);
+        HDassert(strlen(full_path) < 1024);
+        ds_chk_i(fid, full_path, FALSE);
+    }
+
+    if ( pass ) {
+        sprintf(full_path, "%s/H", base_path);
+        HDassert(strlen(full_path) < 1024);
+        vrfy_ds_chk_i(fid, full_path, FALSE);
+    }
+
+    /* Add & verify a chunked dataset w/integer datatype (and data) 
+     * to file 
+     */
+    if ( pass ) {
+        sprintf(full_path, "%s/I", base_path);
+        HDassert(strlen(full_path) < 1024);
+        ds_chk_i(fid, full_path, TRUE);
+    }
+
+    if ( pass ) {
+        sprintf(full_path, "%s/I", base_path);
+        HDassert(strlen(full_path) < 1024);
+        vrfy_ds_chk_i(fid, full_path, TRUE);
+    }
+
+    /* Add & verify a compact dataset w/integer datatype (but no data) 
+     * to file 
+     */
+    if ( pass ) {
+        sprintf(full_path, "%s/J", base_path);
+        HDassert(strlen(full_path) < 1024);
+        ds_cpt_i(fid, full_path, FALSE);
+    }
+
+    if ( pass ) {
+        sprintf(full_path, "%s/J", base_path);
+        HDassert(strlen(full_path) < 1024);
+        vrfy_ds_cpt_i(fid, full_path, FALSE);
+    }
+
+    /* Add & verify a compact dataset w/integer datatype (and data) 
+     * to file 
+     */
+    if ( pass ) {
+        sprintf(full_path, "%s/K", base_path);
+        HDassert(strlen(full_path) < 1024);
+        ds_cpt_i(fid, full_path, TRUE);
+    }
+
+    if ( pass ) {
+        sprintf(full_path, "%s/K", base_path);
+        HDassert(strlen(full_path) < 1024);
+        vrfy_ds_cpt_i(fid, full_path, TRUE);
+    }
+
+    /* Add & verify a contiguous dataset w/variable-length datatype 
+     * (but no data) to file 
+     */
+    if ( pass ) {
+        sprintf(full_path, "%s/L", base_path);
+        HDassert(strlen(full_path) < 1024);
+        ds_ctg_v(fid, full_path, FALSE);
+    }
+
+    if ( pass ) {
+        sprintf(full_path, "%s/L", base_path);
+        HDassert(strlen(full_path) < 1024);
+        vrfy_ds_ctg_v(fid, full_path, FALSE);
+    }
+
+    /* Add & verify a contiguous dataset w/variable-length datatype 
+     * (and data) to file 
+     */
+    if ( pass ) {
+        sprintf(full_path, "%s/M", base_path);
+        HDassert(strlen(full_path) < 1024);
+        ds_ctg_v(fid, full_path, TRUE);
+    }
+
+    if ( pass ) {
+        sprintf(full_path, "%s/M", base_path);
+        HDassert(strlen(full_path) < 1024);
+        vrfy_ds_ctg_v(fid, full_path, TRUE);
+    }
+
+    return;
+
+} /* create_zoo() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    validate_zoo
+ *
+ * Purpose:     Given the path to a group in which a "zoo" has been 
+ *		constructed, validate the objects in the "zoo".
+ *
+ *              If pass is false on entry, do nothing.
+ *
+ *              If an error is detected, set pass to FALSE, and set
+ *              failure_mssg to point to an appropriate error message.
+ *
+ *              This function was initially created to assist in testing
+ *              the cache image feature of the metadata cache.  Thus, it
+ *              only concerns itself with the version 2 superblock, and
+ *              on disk structures that can occur with this version of
+ *              the superblock.
+ *
+ *              Note the associated validate_zoo() function.
+ *
+ * Return:      void
+ *
+ * Programmer:  John Mainzer
+ *              9/14/15
+ *
+ *-------------------------------------------------------------------------
+ */
+
+void
+validate_zoo(hid_t fid, const char *base_path, int proc_num)
+{
+    char full_path[1024];
+
+    HDassert(base_path);
+
+    /* validate an empty "new style" group */
+    if ( pass ) {
+        sprintf(full_path, "%s/A", base_path);
+        HDassert(strlen(full_path) < 1024);
+        vrfy_ns_grp_0(fid, full_path);
+    }
+
+    /* validate a compact "new style" group (3 link messages) */
+    if ( pass ) {
+	sprintf(full_path, "%s/B", base_path);
+        HDassert(strlen(full_path) < 1024);
+        vrfy_ns_grp_c(fid, full_path, 3);
+    }
+
+    /* validate a dense "new style" group (w/300 links, in v2 B-tree & 
+     * fractal heap)
+     */
+    if ( pass ) {
+	sprintf(full_path, "%s/C", base_path);
+        HDassert(strlen(full_path) < 1024);
+        vrfy_ns_grp_d(fid, full_path, 300);
+    }
+
+    /* validate an empty "old style" group in file */
+    if ( pass ) {
+        sprintf(full_path, "%s/D", base_path);
+        HDassert(strlen(full_path) < 1024);
+        vrfy_os_grp_0(fid, full_path);
+    }
+
+    /* validate an "old style" group (w/300 links, in v1 B-tree & 
+     * local heap)
+     */
+    if ( pass ) {
+        sprintf(full_path, "%s/E", base_path);
+        HDassert(strlen(full_path) < 1024);
+        vrfy_os_grp_n(fid, full_path, proc_num, 300);
+    }
+
+    /* validate a contiguous dataset w/integer datatype (but no data) 
+     * in file. 
+     */
+    if ( pass ) {
+        sprintf(full_path, "%s/F", base_path);
+        HDassert(strlen(full_path) < 1024);
+        vrfy_ds_ctg_i(fid, full_path, FALSE);
+    }
+
+    /* validate a contiguous dataset w/integer datatype (with data) 
+     * in file. 
+     */
+    if ( pass ) {
+        sprintf(full_path, "%s/G", base_path);
+        HDassert(strlen(full_path) < 1024);
+        vrfy_ds_ctg_i(fid, full_path, TRUE);
+    }
+
+    /* validate a chunked dataset w/integer datatype (but no data) 
+     * in file 
+     */
+    if ( pass ) {
+        sprintf(full_path, "%s/H", base_path);
+        HDassert(strlen(full_path) < 1024);
+        vrfy_ds_chk_i(fid, full_path, FALSE);
+    }
+
+    /* validate a chunked dataset w/integer datatype (and data) 
+     * in file 
+     */
+    if ( pass ) {
+        sprintf(full_path, "%s/I", base_path);
+        HDassert(strlen(full_path) < 1024);
+        vrfy_ds_chk_i(fid, full_path, TRUE);
+    }
+
+    /* Validate a compact dataset w/integer datatype (but no data) 
+     * in file 
+     */
+    if ( pass ) {
+        sprintf(full_path, "%s/J", base_path);
+        HDassert(strlen(full_path) < 1024);
+        vrfy_ds_cpt_i(fid, full_path, FALSE);
+    }
+
+    /* validate a compact dataset w/integer datatype (and data) 
+     * in file 
+     */
+    if ( pass ) {
+        sprintf(full_path, "%s/K", base_path);
+        HDassert(strlen(full_path) < 1024);
+        vrfy_ds_cpt_i(fid, full_path, TRUE);
+    }
+
+    /* validate a contiguous dataset w/variable-length datatype 
+     * (but no data) to file 
+     */
+    if ( pass ) {
+        sprintf(full_path, "%s/L", base_path);
+        HDassert(strlen(full_path) < 1024);
+        vrfy_ds_ctg_v(fid, full_path, FALSE);
+    }
+
+    /* validate a contiguous dataset w/variable-length datatype 
+     * (and data) to file 
+     */
+    if ( pass ) {
+        sprintf(full_path, "%s/M", base_path);
+        HDassert(strlen(full_path) < 1024);
+        vrfy_ds_ctg_v(fid, full_path, TRUE);
+    }
+
+    return;
+
+} /* validate_zoo() */
+