Merge branch changes from hdf5_1_10.

37 files changed, 4147 insertions, 3934 deletions

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 31155a2..b163b8a 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -454,6 +454,7 @@ set (H5O_SOURCES
     ${HDF5_SRC_DIR}/H5Oflush.c
     ${HDF5_SRC_DIR}/H5Ofsinfo.c
     ${HDF5_SRC_DIR}/H5Oginfo.c
+    ${HDF5_SRC_DIR}/H5Oint.c
     ${HDF5_SRC_DIR}/H5Olayout.c
     ${HDF5_SRC_DIR}/H5Olinfo.c
     ${HDF5_SRC_DIR}/H5Olink.c
@@ -532,6 +533,7 @@ IDE_GENERATED_PROPERTIES ("H5PL" "${H5PL_HDRS}" "${H5PL_SOURCES}" )
 set (H5R_SOURCES
     ${HDF5_SRC_DIR}/H5R.c
     ${HDF5_SRC_DIR}/H5Rdeprec.c
+    ${HDF5_SRC_DIR}/H5Rint.c
 )
 set (H5R_HDRS
     ${HDF5_SRC_DIR}/H5Rpkg.h
diff --git a/src/H5Dchunk.c b/src/H5Dchunk.c
index af6599a..be3b678 100644
--- a/src/H5Dchunk.c
+++ b/src/H5Dchunk.c
@@ -5661,7 +5661,7 @@ H5D__chunk_copy_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
     /* needed for commpressed variable length data */
     hbool_t                 must_filter = FALSE;        /* Whether chunk must be filtered during copy */
     size_t                  nbytes;                     /* Size of chunk in file (in bytes) */
-    H5Z_cb_t                cb_struct;                  /* Filter failure callback struct */
+    H5Z_cb_t                filter_cb;                  /* Filter failure callback struct */
     int                     ret_value = H5_ITER_CONT;   /* Return value */
 
 
@@ -5670,6 +5670,10 @@ H5D__chunk_copy_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
     /* Get 'size_t' local value for number of bytes in chunk */
     H5_CHECKED_ASSIGN(nbytes, size_t, chunk_rec->nbytes, uint32_t);
 
+    /* Initialize the filter callback struct */
+    filter_cb.op_data = NULL;
+    filter_cb.func = NULL;      /* no callback function when failed */
+
     /* Check for filtered chunks */
     /* Check for an edge chunk that is not filtered */
     if(pline && pline->nused) {
@@ -5716,11 +5720,12 @@ H5D__chunk_copy_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
         HDassert(!H5F_addr_defined(chunk_rec->chunk_addr));
         HDmemcpy(buf, udata->chunk, nbytes);
         udata->chunk = NULL;
-    } else {
+    }
+    else {
         H5D_rdcc_ent_t *ent = NULL;    /* Cache entry */
         unsigned idx;                   /* Index of chunk in cache, if present */
         unsigned u;                     /* Counter */
-        H5D_shared_t *shared_fo = udata->cpy_info->shared_fo;
+        H5D_shared_t *shared_fo = (H5D_shared_t *)udata->cpy_info->shared_fo;
 
         /* See if the written chunk is in the chunk cache */
         if(shared_fo && shared_fo->cache.chunk.nslots > 0) {
@@ -5748,7 +5753,8 @@ H5D__chunk_copy_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
 
             H5_CHECKED_ASSIGN(nbytes, size_t, shared_fo->layout.u.chunk.size, uint32_t);
             HDmemcpy(buf, ent->chunk, nbytes);
-        } else {
+        }
+        else {
             /* read chunk data from the source file */
             if(H5F_block_read(udata->file_src, H5FD_MEM_DRAW, chunk_rec->chunk_addr, nbytes, H5AC_rawdata_dxpl_id, buf) < 0)
                 HGOTO_ERROR(H5E_IO, H5E_READERROR, H5_ITER_ERROR, "unable to read raw data chunk")
@@ -5759,8 +5765,7 @@ H5D__chunk_copy_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
     if(must_filter && (is_vlen || fix_ref) && !udata->chunk_in_cache) {
         unsigned filter_mask = chunk_rec->filter_mask;
 
-        cb_struct.func = NULL; /* no callback function when failed */
-        if(H5Z_pipeline(pline, H5Z_FLAG_REVERSE, &filter_mask, H5Z_NO_EDC, cb_struct, &nbytes, &buf_size, &buf) < 0)
+        if(H5Z_pipeline(pline, H5Z_FLAG_REVERSE, &filter_mask, H5Z_NO_EDC, filter_cb, &nbytes, &buf_size, &buf) < 0)
             HGOTO_ERROR(H5E_PLINE, H5E_CANTFILTER, H5_ITER_ERROR, "data pipeline read failed")
     } /* end if */
 
@@ -5822,7 +5827,7 @@ H5D__chunk_copy_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
 
     /* Need to compress variable-length or reference data elements or a chunk found in cache before writing to file */
     if(must_filter && (is_vlen || fix_ref || udata->chunk_in_cache) ) {
-        if(H5Z_pipeline(pline, 0, &(udata_dst.filter_mask), H5Z_NO_EDC, cb_struct, &nbytes, &buf_size, &buf) < 0)
+        if(H5Z_pipeline(pline, 0, &(udata_dst.filter_mask), H5Z_NO_EDC, filter_cb, &nbytes, &buf_size, &buf) < 0)
             HGOTO_ERROR(H5E_PLINE, H5E_CANTFILTER, H5_ITER_ERROR, "output pipeline failed")
 #if H5_SIZEOF_SIZE_T > 4
         /* Check for the chunk expanding too much to encode in a 32-bit value */
@@ -6707,46 +6712,49 @@ H5D__chunk_format_convert_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
     H5_CHECKED_ASSIGN(nbytes, size_t, chunk_rec->nbytes, uint32_t);
     chunk_addr = chunk_rec->chunk_addr;
 
-    if(new_idx_info->pline->nused &&
+    if (new_idx_info->pline->nused &&
           (new_idx_info->layout->flags & H5O_LAYOUT_CHUNK_DONT_FILTER_PARTIAL_BOUND_CHUNKS) &&
           (H5D__chunk_is_partial_edge_chunk(udata->dset_ndims, new_idx_info->layout->dim, chunk_rec->scaled, udata->dset_dims))) {
-	/* This is a partial non-filtered edge chunk */
-	/* Convert the chunk to a filtered edge chunk for v1 B-tree chunk index */
 
-	unsigned filter_mask = chunk_rec->filter_mask;
-	H5Z_cb_t  cb_struct;        	/* Filter failure callback struct */
-	size_t read_size = nbytes;	/* Bytes to read */
+        /* This is a partial non-filtered edge chunk */
+        /* Convert the chunk to a filtered edge chunk for v1 B-tree chunk index */
 
-	HDassert(read_size == new_idx_info->layout->size);
+        unsigned filter_mask = chunk_rec->filter_mask;
+        H5Z_cb_t  filter_cb;        /* Filter failure callback struct */
+        size_t read_size = nbytes;	/* Bytes to read */
+
+        HDassert(read_size == new_idx_info->layout->size);
 
-	cb_struct.func = NULL; /* no callback function when failed */
+        /* Initialize the filter callback struct */
+        filter_cb.op_data = NULL;
+        filter_cb.func = NULL;      /* no callback function when failed */
 
-	/* Allocate buffer for chunk data */
-	if(NULL == (buf = H5MM_malloc(read_size)))
-	    HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, H5_ITER_ERROR, "memory allocation failed for raw data chunk")
+        /* Allocate buffer for chunk data */
+        if (NULL == (buf = H5MM_malloc(read_size)))
+            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, H5_ITER_ERROR, "memory allocation failed for raw data chunk")
 
-	/* Read the non-filtered edge chunk */
-        if(H5F_block_read(new_idx_info->f, H5FD_MEM_DRAW, chunk_addr, read_size, H5AC_rawdata_dxpl_id, buf) < 0)
-	    HGOTO_ERROR(H5E_IO, H5E_READERROR, H5_ITER_ERROR, "unable to read raw data chunk")
+        /* Read the non-filtered edge chunk */
+        if (H5F_block_read(new_idx_info->f, H5FD_MEM_DRAW, chunk_addr, read_size, H5AC_rawdata_dxpl_id, buf) < 0)
+            HGOTO_ERROR(H5E_IO, H5E_READERROR, H5_ITER_ERROR, "unable to read raw data chunk")
 
-	/* Pass the chunk through the pipeline */
-	if(H5Z_pipeline(new_idx_info->pline, 0, &filter_mask, H5Z_NO_EDC, cb_struct, &nbytes, &read_size, &buf) < 0)
-	    HGOTO_ERROR(H5E_PLINE, H5E_CANTFILTER, H5_ITER_ERROR, "output pipeline failed")
+        /* Pass the chunk through the pipeline */
+        if (H5Z_pipeline(new_idx_info->pline, 0, &filter_mask, H5Z_NO_EDC, filter_cb, &nbytes, &read_size, &buf) < 0)
+            HGOTO_ERROR(H5E_PLINE, H5E_CANTFILTER, H5_ITER_ERROR, "output pipeline failed")
 
 #if H5_SIZEOF_SIZE_T > 4
         /* Check for the chunk expanding too much to encode in a 32-bit value */
-	if(nbytes > ((size_t)0xffffffff))
-	    HGOTO_ERROR(H5E_DATASET, H5E_BADRANGE, H5_ITER_ERROR, "chunk too large for 32-bit length")
+        if (nbytes > ((size_t)0xffffffff))
+            HGOTO_ERROR(H5E_DATASET, H5E_BADRANGE, H5_ITER_ERROR, "chunk too large for 32-bit length")
 #endif /* H5_SIZEOF_SIZE_T > 4 */
 
-	/* Allocate space for the filtered chunk */
-	if((chunk_addr = H5MF_alloc(new_idx_info->f, H5FD_MEM_DRAW, new_idx_info->dxpl_id, (hsize_t)nbytes)) == HADDR_UNDEF)
-	    HGOTO_ERROR(H5E_DATASET, H5E_NOSPACE, H5_ITER_ERROR, "file allocation failed for filtered chunk")
-	HDassert(H5F_addr_defined(chunk_addr));
+        /* Allocate space for the filtered chunk */
+        if ((chunk_addr = H5MF_alloc(new_idx_info->f, H5FD_MEM_DRAW, new_idx_info->dxpl_id, (hsize_t)nbytes)) == HADDR_UNDEF)
+            HGOTO_ERROR(H5E_DATASET, H5E_NOSPACE, H5_ITER_ERROR, "file allocation failed for filtered chunk")
+        HDassert(H5F_addr_defined(chunk_addr));
 
-	/* Write the filtered chunk to disk */
-	if(H5F_block_write(new_idx_info->f, H5FD_MEM_DRAW, chunk_addr, nbytes, H5AC_rawdata_dxpl_id, buf) < 0)
-	    HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, H5_ITER_ERROR, "unable to write raw data to file")
+        /* Write the filtered chunk to disk */
+        if (H5F_block_write(new_idx_info->f, H5FD_MEM_DRAW, chunk_addr, nbytes, H5AC_rawdata_dxpl_id, buf) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, H5_ITER_ERROR, "unable to write raw data to file")
     } /* end if */
 
     /* Set up chunk information for insertion to chunk index */
@@ -6758,11 +6766,11 @@ H5D__chunk_format_convert_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
     insert_udata.common.storage = new_idx_info->storage;
 
     /* Insert chunk into the v1 B-tree chunk index */
-    if((new_idx_info->storage->ops->insert)(new_idx_info, &insert_udata, NULL) < 0)
+    if ((new_idx_info->storage->ops->insert)(new_idx_info, &insert_udata, NULL) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINSERT, H5_ITER_ERROR, "unable to insert chunk addr into index")
 
 done:
-    if(buf)
+    if (buf)
         H5MM_xfree(buf);
 
     FUNC_LEAVE_NOAPI(ret_value)
diff --git a/src/H5Dcompact.c b/src/H5Dcompact.c
index 041d28f..43e7754 100644
--- a/src/H5Dcompact.c
+++ b/src/H5Dcompact.c
@@ -431,7 +431,7 @@ H5D__compact_copy(H5F_t *f_src, H5O_storage_compact_t *_storage_src, H5F_t *f_ds
     void       *bkg = NULL;             /* Temporary buffer for copying data */
     void       *reclaim_buf = NULL;     /* Buffer for reclaiming data */
     hid_t       buf_sid = -1;           /* ID for buffer dataspace */
-    H5D_shared_t    *shared_fo = cpy_info->shared_fo;   /* Pointer to the shared struct for dataset object */
+    H5D_shared_t    *shared_fo = (H5D_shared_t *)cpy_info->shared_fo;   /* Pointer to the shared struct for dataset object */
     H5O_storage_compact_t *storage_src = _storage_src;  /* Pointer to storage_src */
     herr_t      ret_value = SUCCEED;    /* Return value */
 
diff --git a/src/H5Dcontig.c b/src/H5Dcontig.c
index 86de017..aab4901 100644
--- a/src/H5Dcontig.c
+++ b/src/H5Dcontig.c
@@ -1363,7 +1363,7 @@ H5D__contig_copy(H5F_t *f_src, const H5O_storage_contig_t *storage_src,
     hsize_t     buf_dim[1] = {0};       /* Dimension for buffer */
     hbool_t     is_vlen = FALSE;        /* Flag to indicate that VL type conversion should occur */
     hbool_t     fix_ref = FALSE;        /* Flag to indicate that ref values should be fixed */
-    H5D_shared_t    *shared_fo = cpy_info->shared_fo;  /* Pointer to the shared struct for dataset object */
+    H5D_shared_t    *shared_fo = (H5D_shared_t *)cpy_info->shared_fo;  /* Pointer to the shared struct for dataset object */
     hbool_t     try_sieve = FALSE;      /* Try to get data from the sieve buffer */
     haddr_t     sieve_start = HADDR_UNDEF; /* Start location of sieve buffer */
     haddr_t     sieve_end = HADDR_UNDEF;    /* End locations of sieve buffer */
diff --git a/src/H5Dio.c b/src/H5Dio.c
index 104a632..280d602 100644
--- a/src/H5Dio.c
+++ b/src/H5Dio.c
@@ -962,7 +962,9 @@ const
     io_info->using_mpi_vfd = H5F_HAS_FEATURE(dset->oloc.file, H5FD_FEAT_HAS_MPI);
 #endif /* H5_HAVE_PARALLEL */
 
-done:
+#ifdef H5_DEBUG_BUILD
+	done:
+#endif /* H5_DEBUG_BUILD */
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D__ioinfo_init() */
 
diff --git a/src/H5FSint.c b/src/H5FSint.c
index 4297291..264950d 100644
--- a/src/H5FSint.c
+++ b/src/H5FSint.c
@@ -96,10 +96,9 @@ H5FS_init(void)
 {
     herr_t ret_value = SUCCEED;   /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_NOAPI_NOERR
     /* FUNC_ENTER() does all the work */
 
-done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5FS_init() */
 
diff --git a/src/H5Gnode.c b/src/H5Gnode.c
index 76e2c4b..b335624 100644
--- a/src/H5Gnode.c
+++ b/src/H5Gnode.c
@@ -640,7 +640,7 @@ H5G_node_insert(H5F_t *f, hid_t dxpl_id, haddr_t addr,
     while(lt < rt) {
         idx = (int)((lt + rt) / 2);
         if((s = (const char *)H5HL_offset_into(udata->common.heap, sn->entry[idx].name_off)) == NULL)
-            HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "unable to get symbol table name")
+            HGOTO_ERROR(H5E_SYM, H5E_CANTGET, H5B_INS_ERROR, "unable to get symbol table name")
 
         /* Check if symbol is already present */
         if(0 == (cmp = HDstrcmp(udata->common.name, s)))
@@ -802,8 +802,8 @@ H5G_node_remove(H5F_t *f, hid_t dxpl_id, haddr_t addr, void *_lt_key/*in,out*/,
             const char *s;          /* Pointer to string in local heap */
 
             idx = (lt + rt) / 2;
-            if((s = H5HL_offset_into(udata->common.heap, sn->entry[idx].name_off)) == NULL)
-                HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "unable to get symbol table name")
+            if((s = (const char *)H5HL_offset_into(udata->common.heap, sn->entry[idx].name_off)) == NULL)
+                HGOTO_ERROR(H5E_SYM, H5E_CANTGET, H5B_INS_ERROR, "unable to get symbol table name")
             cmp = HDstrcmp(udata->common.name, s);
             if(cmp < 0)
                 rt = idx;
diff --git a/src/H5HFcache.c b/src/H5HFcache.c
index f957e2e..069bf17 100644
--- a/src/H5HFcache.c
+++ b/src/H5HFcache.c
@@ -1671,9 +1671,13 @@ H5HF__cache_dblock_verify_chksum(const void *_image, size_t len, void *_udata)
 	HGOTO_DONE(TRUE);
 
     if(hdr->filter_len > 0) {
-	size_t nbytes;          /* Number of bytes used in buffer, after applying reverse filters */
-	unsigned filter_mask;	/* Excluded filters for direct block */
-	H5Z_cb_t filter_cb = {NULL, NULL};  /* Filter callback structure */
+        size_t nbytes;          /* Number of bytes used in buffer, after applying reverse filters */
+        unsigned filter_mask;	/* Excluded filters for direct block */
+        H5Z_cb_t filter_cb;     /* Filter callback structure */
+
+        /* Initialize the filter callback struct */
+        filter_cb.op_data = NULL;
+        filter_cb.func = NULL;      /* no callback function when failed */
 
         /* Allocate buffer to perform I/O filtering on and copy image into
          * it.  Must do this as H5Z_pipeline() may re-size the buffer 
@@ -1682,17 +1686,17 @@ H5HF__cache_dblock_verify_chksum(const void *_image, size_t len, void *_udata)
         if(NULL == (read_buf = H5MM_malloc(len)))
             HGOTO_ERROR(H5E_HEAP, H5E_NOSPACE, FAIL, "memory allocation failed for pipeline buffer")
 
-	/* Set up parameters for filter pipeline */
-	nbytes = len;
-	filter_mask = udata->filter_mask;
+        /* Set up parameters for filter pipeline */
+        nbytes = len;
+        filter_mask = udata->filter_mask;
         HDmemcpy(read_buf, image, len);
 
-	/* Push direct block data through I/O filter pipeline */
-	if(H5Z_pipeline(&(hdr->pline), H5Z_FLAG_REVERSE, &filter_mask, H5Z_ENABLE_EDC, filter_cb, &nbytes, &len, &read_buf) < 0)
-	    HGOTO_ERROR(H5E_HEAP, H5E_CANTFILTER, FAIL, "output pipeline failed")
+        /* Push direct block data through I/O filter pipeline */
+        if(H5Z_pipeline(&(hdr->pline), H5Z_FLAG_REVERSE, &filter_mask, H5Z_ENABLE_EDC, filter_cb, &nbytes, &len, &read_buf) < 0)
+            HGOTO_ERROR(H5E_HEAP, H5E_CANTFILTER, FAIL, "output pipeline failed")
 
         /* Update info about direct block */
-	udata->decompressed = TRUE;
+        udata->decompressed = TRUE;
         len = nbytes;
     } /* end if */
     else
@@ -1818,45 +1822,49 @@ H5HF__cache_dblock_deserialize(const void *_image, size_t len, void *_udata,
             udata->dblk = NULL;
         } /* end if */
         else {
-            H5Z_cb_t filter_cb = {NULL, NULL};  /* Filter callback structure */
+            H5Z_cb_t filter_cb;     /* Filter callback structure */
             size_t nbytes;          /* Number of bytes used in buffer, after applying reverse filters */
             unsigned filter_mask;   /* Excluded filters for direct block */
 
             /* Sanity check */
-	    HDassert(udata->dblk == NULL);
+            HDassert(udata->dblk == NULL);
 
-	    /* Allocate buffer to perform I/O filtering on and copy image into
-	     * it.  Must do this as H5Z_pipeline() may resize the buffer 
-	     * provided to it.
-	     */
-	    if(NULL == (read_buf = H5MM_malloc(len)))
-		HGOTO_ERROR(H5E_HEAP, H5E_NOSPACE, NULL, "memory allocation failed for pipeline buffer")
+            /* Initialize the filter callback struct */
+            filter_cb.op_data = NULL;
+            filter_cb.func = NULL;      /* no callback function when failed */
+
+            /* Allocate buffer to perform I/O filtering on and copy image into
+             * it.  Must do this as H5Z_pipeline() may resize the buffer 
+             * provided to it.
+             */
+            if (NULL == (read_buf = H5MM_malloc(len)))
+                HGOTO_ERROR(H5E_HEAP, H5E_NOSPACE, NULL, "memory allocation failed for pipeline buffer")
 
             /* Copy compressed image into buffer */
-	    HDmemcpy(read_buf, image, len);
+            HDmemcpy(read_buf, image, len);
 
-	    /* Push direct block data through I/O filter pipeline */
-	    nbytes = len;
-	    filter_mask = udata->filter_mask;
-	    if(H5Z_pipeline(&(hdr->pline), H5Z_FLAG_REVERSE, &filter_mask, H5Z_ENABLE_EDC, filter_cb, &nbytes, &len, &read_buf) < 0)
-		HGOTO_ERROR(H5E_HEAP, H5E_CANTFILTER, NULL, "output pipeline failed")
+            /* Push direct block data through I/O filter pipeline */
+            nbytes = len;
+            filter_mask = udata->filter_mask;
+            if (H5Z_pipeline(&(hdr->pline), H5Z_FLAG_REVERSE, &filter_mask, H5Z_ENABLE_EDC, filter_cb, &nbytes, &len, &read_buf) < 0)
+                HGOTO_ERROR(H5E_HEAP, H5E_CANTFILTER, NULL, "output pipeline failed")
 
-	    /* Sanity check */
-	    HDassert(nbytes == dblock->size);
+            /* Sanity check */
+            HDassert(nbytes == dblock->size);
 
-	    /* Copy un-filtered data into block's buffer */
-	    HDmemcpy(dblock->blk, read_buf, dblock->size);
-	} /* end if */
+            /* Copy un-filtered data into block's buffer */
+            HDmemcpy(dblock->blk, read_buf, dblock->size);
+        } /* end if */
     } /* end if */
     else {
         /* Sanity checks */
-	HDassert(udata->dblk == NULL);
-	HDassert(!udata->decompressed);
+        HDassert(udata->dblk == NULL);
+        HDassert(!udata->decompressed);
 
-	/* Allocate block buffer */
-/* XXX: Change to using free-list factories */
-	if(NULL == (dblock->blk = H5FL_BLK_MALLOC(direct_block, (size_t)dblock->size)))
-	    HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
+        /* Allocate block buffer */
+        /* XXX: Change to using free-list factories */
+        if  (NULL == (dblock->blk = H5FL_BLK_MALLOC(direct_block, (size_t)dblock->size)))
+            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
 
         /* Copy image to dblock->blk */
         HDassert(dblock->size == len);
@@ -1895,9 +1903,9 @@ H5HF__cache_dblock_deserialize(const void *_image, size_t len, void *_udata,
 
     /* Decode checksum on direct block, if requested */
     if(hdr->checksum_dblocks) {
-	uint32_t stored_chksum;         /* Metadata checksum value */
+        uint32_t stored_chksum;         /* Metadata checksum value */
 
-	/* checksum verification already done in verify_chksum cb */
+        /* checksum verification already done in verify_chksum cb */
 
         /* Metadata checksum */
         UINT32DECODE(image, stored_chksum);
@@ -2188,10 +2196,14 @@ H5HF__cache_dblock_pre_serialize(H5F_t *f, hid_t dxpl_id, void *_thing,
 
     /* Check for I/O filters on this heap */
     if(hdr->filter_len > 0) {
-        H5Z_cb_t filter_cb = {NULL, NULL};  /* Filter callback structure */
+        H5Z_cb_t filter_cb;                 /* Filter callback structure */
         size_t nbytes;                      /* Number of bytes used */
         unsigned filter_mask = 0;           /* Filter mask for block */
 
+        /* Initialize the filter callback struct */
+        filter_cb.op_data = NULL;
+        filter_cb.func = NULL;      /* no callback function when failed */
+
         /* Allocate buffer to perform I/O filtering on */
         write_size = dblock->size;
         if(NULL == (write_buf = H5MM_malloc(write_size)))
diff --git a/src/H5HFhuge.c b/src/H5HFhuge.c
index b2a1e68..350100e 100644
--- a/src/H5HFhuge.c
+++ b/src/H5HFhuge.c
@@ -345,9 +345,13 @@ HDfprintf(stderr, "%s: obj_size = %Zu\n", FUNC, obj_size);
 
     /* Check for I/O pipeline filter on heap */
     if(hdr->filter_len > 0) {
-        H5Z_cb_t filter_cb = {NULL, NULL};  /* Filter callback structure */
+        H5Z_cb_t filter_cb;                 /* Filter callback structure */
         size_t nbytes;                      /* Number of bytes used */
 
+        /* Initialize the filter callback struct */
+        filter_cb.op_data = NULL;
+        filter_cb.func = NULL;          /* no callback function when failed */
+
         /* Allocate buffer to perform I/O filtering on */
         write_size = obj_size;
         if(NULL == (write_buf = H5MM_malloc(write_size)))
@@ -773,10 +777,14 @@ H5HF_huge_op_real(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
 
     /* Check for I/O pipeline filter on heap */
     if(hdr->filter_len > 0) {
-        H5Z_cb_t filter_cb = {NULL, NULL};  /* Filter callback structure */
+        H5Z_cb_t filter_cb;                 /* Filter callback structure */
         size_t read_size;                   /* Object's size in the file */
         size_t nbytes;                      /* Number of bytes used */
 
+        /* Initialize the filter callback struct */
+        filter_cb.op_data = NULL;
+        filter_cb.func = NULL;          /* no callback function when failed */
+
         /* De-filter the object */
         read_size = nbytes = obj_size;
         if(H5Z_pipeline(&(hdr->pline), H5Z_FLAG_REVERSE, &filter_mask, H5Z_NO_EDC, filter_cb, &nbytes, &read_size, &read_buf) < 0)
diff --git a/src/H5MF.c b/src/H5MF.c
index 49c7b77..7e06654 100644
--- a/src/H5MF.c
+++ b/src/H5MF.c
@@ -3247,7 +3247,6 @@ H5MF_settle_meta_data_fsm(H5F_t *f, hid_t dxpl_id, hbool_t *fsm_settled)
                                         /* for self referential FSMs */
     haddr_t eoa_post_fsm_fsalloc;       /* eoa post file space allocation */
                                         /* for self referential FSMs */
-    H5FS_stat_t fs_stat;                /* Information for hdr FSM */
     H5P_genplist_t *dxpl = NULL;        /* DXPL for setting ring */
     H5AC_ring_t orig_ring = H5AC_RING_INV; /* Original ring value */
     hbool_t	reset_ring = FALSE;     /* Whether we set the ring */
@@ -3310,6 +3309,9 @@ H5MF_settle_meta_data_fsm(H5F_t *f, hid_t dxpl_id, hbool_t *fsm_settled)
         reset_ring = TRUE;
 
 #ifndef NDEBUG
+{
+        H5FS_stat_t fs_stat;                /* Information for hdr FSM */
+
         /* Verify that sm_hdr_fspace is floating if it exists */
         if(sm_hdr_fspace) {
             /* Query free space manager info for this type */
@@ -3357,6 +3359,7 @@ H5MF_settle_meta_data_fsm(H5F_t *f, hid_t dxpl_id, hbool_t *fsm_settled)
                 HDassert(fs_stat.alloc_sect_size == 0);
             } /* end if */
         } /* end if */
+}
 #endif /* NDEBUG */
 
         /* Free the space in the metadata aggregator.  Do this via the
diff --git a/src/H5MM.c b/src/H5MM.c
index ee3b28f..866dfbe 100644
--- a/src/H5MM.c
+++ b/src/H5MM.c
@@ -268,8 +268,6 @@ H5MM_malloc(size_t size)
 {
     void *ret_value = NULL;
 
-    HDassert(size);
-
     /* Use FUNC_ENTER_NOAPI_NOINIT_NOERR here to avoid performance issues */
     FUNC_ENTER_NOAPI_NOINIT_NOERR
 
@@ -357,8 +355,6 @@ H5MM_calloc(size_t size)
 {
     void *ret_value = NULL;
 
-    HDassert(size);
-
     /* Use FUNC_ENTER_NOAPI_NOINIT_NOERR here to avoid performance issues */
     FUNC_ENTER_NOAPI_NOINIT_NOERR
 
@@ -407,8 +403,6 @@ H5MM_realloc(void *mem, size_t size)
     /* Use FUNC_ENTER_NOAPI_NOINIT_NOERR here to avoid performance issues */
     FUNC_ENTER_NOAPI_NOINIT_NOERR
 
-    HDassert(mem || size);
-
     if(NULL == mem && 0 == size)
         /* Not defined in the standard, return NULL */
         ret_value = NULL;
@@ -454,7 +448,7 @@ H5MM_realloc(void *mem, size_t size)
  *              NULL is an acceptable value for the input string.
  *
  * Return:      Success:    Pointer to a new string (NULL if s is NULL).
- *              Failure:    abort()
+ *              Failure:    NULL
  *
  * Programmer:  Robb Matzke
  *              Jul 10 1997
diff --git a/src/H5O.c b/src/H5O.c
index 152e6cc..cf84b47 100644
--- a/src/H5O.c
+++ b/src/H5O.c
@@ -13,11 +13,9 @@
 
 /*-------------------------------------------------------------------------
  *
- * Created:		H5O.c
- *			Aug  5 1997
- *			Robb Matzke <matzke@llnl.gov>
+ * Created:     H5O.c
  *
- * Purpose:		Object header routines.
+ * Purpose:     Public object header routines
  *
  *-------------------------------------------------------------------------
  */
@@ -32,19 +30,12 @@
 /***********/
 /* Headers */
 /***********/
-#include "H5private.h"		/* Generic Functions			*/
-#include "H5Eprivate.h"		/* Error handling		  	*/
-#include "H5Fprivate.h"		/* File access				*/
-#include "H5FLprivate.h"	/* Free lists                           */
-#include "H5FOprivate.h"        /* File objects                         */
-#include "H5Iprivate.h"		/* IDs			  		*/
-#include "H5Lprivate.h"		/* Links				*/
-#include "H5MFprivate.h"	/* File memory management		*/
-#ifdef H5O_ENABLE_BOGUS
-#include "H5MMprivate.h"	/* Memory management			*/
-#endif /* H5O_ENABLE_BOGUS */
-#include "H5Opkg.h"             /* Object headers			*/
-#include "H5SMprivate.h"        /* Shared object header messages        */
+#include "H5private.h"          /* Generic Functions                        */
+#include "H5Eprivate.h"         /* Error handling                           */
+#include "H5Fprivate.h"         /* File access                              */
+#include "H5Iprivate.h"         /* IDs                                      */
+#include "H5Lprivate.h"         /* Links                                    */
+#include "H5Opkg.h"             /* Object headers                           */
 
 
 /****************/
@@ -56,17 +47,6 @@
 /* Local Typedefs */
 /******************/
 
-/* User data for recursive traversal over objects from a group */
-typedef struct {
-    hid_t       obj_id;         /* The ID for the starting group */
-    H5G_loc_t	*start_loc;     /* Location of starting group */
-    hid_t       lapl_id;        /* LAPL for walking across links */
-    hid_t       dxpl_id; 	/* DXPL for operations */
-    H5SL_t     *visited;        /* Skip list for tracking visited nodes */
-    H5O_iterate_t op;           /* Application callback */
-    void       *op_data;        /* Application's op data */
-} H5O_iter_visit_ud_t;
-
 
 /********************/
 /* Package Typedefs */
@@ -77,136 +57,21 @@ typedef struct {
 /* Local Prototypes */
 /********************/
 
-static herr_t H5O_delete_oh(H5F_t *f, hid_t dxpl_id, H5O_t *oh);
-static herr_t H5O_obj_type_real(H5O_t *oh, H5O_type_t *obj_type);
-static herr_t H5O_visit(hid_t loc_id, const char *obj_name, H5_index_t idx_type,
-    H5_iter_order_t order, H5O_iterate_t op, void *op_data, hid_t lapl_id,
-    hid_t dxpl_id);
-static herr_t H5O_get_hdr_info_real(const H5O_t *oh, H5O_hdr_info_t *hdr);
-static const H5O_obj_class_t *H5O_obj_class_real(H5O_t *oh);
-
 
 /*********************/
 /* Package Variables */
 /*********************/
 
-/* Package initialization variable */
-hbool_t H5_PKG_INIT_VAR = FALSE;
-
-/* Header message ID to class mapping */
-
-/* Remember to increment H5O_MSG_TYPES in H5Opkg.h when adding a new
- * message.
- */
-
-const H5O_msg_class_t *const H5O_msg_class_g[] = {
-    H5O_MSG_NULL,		/*0x0000 Null				*/
-    H5O_MSG_SDSPACE,		/*0x0001 Dataspace			*/
-    H5O_MSG_LINFO,		/*0x0002 Link information		*/
-    H5O_MSG_DTYPE,		/*0x0003 Datatype			*/
-    H5O_MSG_FILL,       	/*0x0004 Old data storage -- fill value */
-    H5O_MSG_FILL_NEW,		/*0x0005 New data storage -- fill value */
-    H5O_MSG_LINK,		/*0x0006 Link 				*/
-    H5O_MSG_EFL,		/*0x0007 Data storage -- external data files */
-    H5O_MSG_LAYOUT,		/*0x0008 Data Layout			*/
-#ifdef H5O_ENABLE_BOGUS
-    H5O_MSG_BOGUS_VALID,	/*0x0009 "Bogus valid" (for testing)	*/
-#else /* H5O_ENABLE_BOGUS */
-    NULL,			/*0x0009 "Bogus valid" (for testing)	*/
-#endif /* H5O_ENABLE_BOGUS */
-    H5O_MSG_GINFO,		/*0x000A Group information		*/
-    H5O_MSG_PLINE,		/*0x000B Data storage -- filter pipeline */
-    H5O_MSG_ATTR,		/*0x000C Attribute			*/
-    H5O_MSG_NAME,		/*0x000D Object name			*/
-    H5O_MSG_MTIME,		/*0x000E Object modification date and time */
-    H5O_MSG_SHMESG,		/*0x000F File-wide shared message table */
-    H5O_MSG_CONT,		/*0x0010 Object header continuation	*/
-    H5O_MSG_STAB,		/*0x0011 Symbol table			*/
-    H5O_MSG_MTIME_NEW,		/*0x0012 New Object modification date and time */
-    H5O_MSG_BTREEK,		/*0x0013 Non-default v1 B-tree 'K' values */
-    H5O_MSG_DRVINFO,		/*0x0014 Driver info settings		*/
-    H5O_MSG_AINFO,		/*0x0015 Attribute information		*/
-    H5O_MSG_REFCOUNT,		/*0x0016 Object's ref. count		*/
-    H5O_MSG_FSINFO,		/*0x0017 Free-space manager info        */
-    H5O_MSG_MDCI,               /*0x0018 Metadata cache image           */
-    H5O_MSG_UNKNOWN,		/*0x0019 Placeholder for unknown message */
-#ifdef H5O_ENABLE_BOGUS
-    H5O_MSG_BOGUS_INVALID, 	/*0x001A "Bogus invalid" (for testing) 	*/
-#else /* H5O_ENABLE_BOGUS */
-    NULL,                       /*0x001A "Bogus invalid" (for testing) 	*/
-#endif /* H5O_ENABLE_BOGUS */
-};
-
-/* Declare a free list to manage the H5O_t struct */
-H5FL_DEFINE(H5O_t);
-
-/* Declare a free list to manage the H5O_mesg_t sequence information */
-H5FL_SEQ_DEFINE(H5O_mesg_t);
-
-/* Declare a free list to manage the H5O_chunk_t sequence information */
-H5FL_SEQ_DEFINE(H5O_chunk_t);
-
-/* Declare a free list to manage the chunk image information */
-H5FL_BLK_DEFINE(chunk_image);
-
-/* Declare external the free list for H5O_cont_t sequences */
-H5FL_SEQ_EXTERN(H5O_cont_t);
-
 
 /*****************************/
 /* Library Private Variables */
 /*****************************/
 
-/* Declare external the free list for time_t's */
-H5FL_EXTERN(time_t);
-
-/* Declare external the free list for H5_obj_t's */
-H5FL_EXTERN(H5_obj_t);
-
 
 /*******************/
 /* Local Variables */
 /*******************/
 
-/* Header object ID to class mapping */
-/*
- * Initialize the object class info table.  Begin with the most general types
- * and end with the most specific. For instance, any object that has a
- * datatype message is a datatype but only some of them are datasets.
- */
-static const H5O_obj_class_t *const H5O_obj_class_g[] = {
-    H5O_OBJ_DATATYPE,		/* Datatype object (H5O_TYPE_NAMED_DATATYPE - 2) */
-    H5O_OBJ_DATASET,		/* Dataset object (H5O_TYPE_DATASET - 1) */
-    H5O_OBJ_GROUP,		/* Group object (H5O_TYPE_GROUP - 0) */
-};
-
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O__init_package
- *
- * Purpose:	Initialize information specific to H5O interface.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *              Thursday, January 18, 2007
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O__init_package(void)
-{
-    FUNC_ENTER_PACKAGE_NOERR
-
-    /* H5O interface sanity checks */
-    HDcompile_assert(H5O_MSG_TYPES == NELMTS(H5O_msg_class_g));
-    HDcompile_assert(sizeof(H5O_fheap_id_t) == H5O_FHEAP_ID_LEN);
-
-    HDcompile_assert(H5O_UNKNOWN_ID < H5O_MSG_TYPES);
-
-    FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O__init_package() */
 
 
 /*-------------------------------------------------------------------------
@@ -302,11 +167,11 @@ H5Oopen_by_idx(hid_t loc_id, const char *group_name, H5_index_t idx_type,
     if(H5G_loc(loc_id, &loc) < 0)
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
     if(!group_name || !*group_name)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name specified")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name specified")
     if(idx_type <= H5_INDEX_UNKNOWN || idx_type >= H5_INDEX_N)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index type specified")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index type specified")
     if(order <= H5_ITER_UNKNOWN || order >= H5_ITER_N)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
 
     /* Verify access property list and get correct dxpl */
     if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, loc_id, FALSE) < 0)
@@ -710,11 +575,11 @@ H5Oget_info_by_idx(hid_t loc_id, const char *group_name, H5_index_t idx_type,
     if(H5G_loc(loc_id, &loc) < 0)
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
     if(!group_name || !*group_name)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name specified")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name specified")
     if(idx_type <= H5_INDEX_UNKNOWN || idx_type >= H5_INDEX_N)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index type specified")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index type specified")
     if(order <= H5_ITER_UNKNOWN || order >= H5_ITER_N)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
     if(!oinfo)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no info struct")
 
@@ -958,15 +823,15 @@ H5Ovisit(hid_t obj_id, H5_index_t idx_type, H5_iter_order_t order,
 
     /* Check args */
     if(idx_type <= H5_INDEX_UNKNOWN || idx_type >= H5_INDEX_N)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index type specified")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index type specified")
     if(order <= H5_ITER_UNKNOWN || order >= H5_ITER_N)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
     if(!op)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no callback operator specified")
 
     /* Call internal object visitation routine */
     if((ret_value = H5O_visit(obj_id, ".", idx_type, order, op, op_data, H5P_LINK_ACCESS_DEFAULT, H5AC_ind_read_dxpl_id)) < 0)
-	HGOTO_ERROR(H5E_OHDR, H5E_BADITER, FAIL, "object visitation failed")
+        HGOTO_ERROR(H5E_OHDR, H5E_BADITER, FAIL, "object visitation failed")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -1020,9 +885,9 @@ H5Ovisit_by_name(hid_t loc_id, const char *obj_name, H5_index_t idx_type,
     if(!obj_name || !*obj_name)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name")
     if(idx_type <= H5_INDEX_UNKNOWN || idx_type >= H5_INDEX_N)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index type specified")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index type specified")
     if(order <= H5_ITER_UNKNOWN || order >= H5_ITER_N)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
     if(!op)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no callback operator specified")
 
@@ -1032,7 +897,7 @@ H5Ovisit_by_name(hid_t loc_id, const char *obj_name, H5_index_t idx_type,
 
     /* Call internal object visitation routine */
     if((ret_value = H5O_visit(loc_id, obj_name, idx_type, order, op, op_data, lapl_id, dxpl_id)) < 0)
-	HGOTO_ERROR(H5E_OHDR, H5E_BADITER, FAIL, "object visitation failed")
+        HGOTO_ERROR(H5E_OHDR, H5E_BADITER, FAIL, "object visitation failed")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -1212,2514 +1077,3 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* H5Oare_mdc_flushes_disabled() */
 
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_create
- *
- * Purpose:	Creates a new object header. Allocates space for it and
- *              then calls an initialization function. The object header
- *              is opened for write access and should eventually be
- *              closed by calling H5O_close().
- *
- * Return:	Success:	Non-negative, the ENT argument contains
- *				information about the object header,
- *				including its address.
- *
- *		Failure:	Negative
- *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Aug  5 1997
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_create(H5F_t *f, hid_t dxpl_id, size_t size_hint, size_t initial_rc,
-    hid_t ocpl_id, H5O_loc_t *loc/*out*/)
-{
-    H5P_genplist_t  *oc_plist;          /* Object creation property list */
-    H5O_t      *oh = NULL;              /* Object header created */
-    haddr_t     oh_addr;                /* Address of initial object header */
-    size_t      oh_size;                /* Size of initial object header */
-    uint8_t	oh_flags;		/* Object header's initial status flags */
-    unsigned    insert_flags = H5AC__NO_FLAGS_SET; /* Flags for inserting object header into cache */
-    hbool_t     store_msg_crt_idx;      /* Whether to always store message creation indices for this file */
-    herr_t      ret_value = SUCCEED;    /* return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* check args */
-    HDassert(f);
-    HDassert(loc);
-    HDassert(TRUE == H5P_isa_class(ocpl_id, H5P_OBJECT_CREATE));
-
-    /* Check for invalid access request */
-    if(0 == (H5F_INTENT(f) & H5F_ACC_RDWR))
-        HGOTO_ERROR(H5E_OHDR, H5E_BADVALUE, FAIL, "no write intent on file")
-
-    /* Make certain we allocate at least a reasonable size for the object header */
-    size_hint = H5O_ALIGN_F(f, MAX(H5O_MIN_SIZE, size_hint));
-
-    /* Get the property list */
-    if(NULL == (oc_plist = (H5P_genplist_t *)H5I_object(ocpl_id)))
-        HGOTO_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not a property list")
-
-    /* Get any object header status flags set by properties */
-    if(H5P_get(oc_plist, H5O_CRT_OHDR_FLAGS_NAME, &oh_flags) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get object header flags")
-
-    /* Allocate the object header and zero out header fields */
-    if(NULL == (oh = H5FL_CALLOC(H5O_t)))
-        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
-
-    /* Initialize file-specific information for object header */
-    store_msg_crt_idx = H5F_STORE_MSG_CRT_IDX(f);
-    if(H5F_USE_LATEST_FLAGS(f, H5F_LATEST_OBJ_HEADER) || store_msg_crt_idx || (oh_flags & H5O_HDR_ATTR_CRT_ORDER_TRACKED))
-        oh->version = H5O_VERSION_LATEST;
-    else
-        oh->version = H5O_VERSION_1;
-    oh->sizeof_size = H5F_SIZEOF_SIZE(f);
-    oh->sizeof_addr = H5F_SIZEOF_ADDR(f);
-    oh->swmr_write = !!(H5F_INTENT(f) & H5F_ACC_SWMR_WRITE);
-#ifdef H5O_ENABLE_BAD_MESG_COUNT
-    /* Check whether the "bad message count" property is set */
-    if(H5P_exist_plist(oc_plist, H5O_BAD_MESG_COUNT_NAME) > 0) {
-        /* Retrieve bad message count flag */
-        if(H5P_get(oc_plist, H5O_BAD_MESG_COUNT_NAME, &oh->store_bad_mesg_count) < 0)
-            HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't get bad message count flag")
-    } /* end if */
-#endif /* H5O_ENABLE_BAD_MESG_COUNT */
-
-    /* Create object header proxy if doing SWMR writes */
-    if(oh->swmr_write) {
-        /* Create virtual entry, for use as proxy */
-        if(NULL == (oh->proxy = H5AC_proxy_entry_create()))
-            HGOTO_ERROR(H5E_OHDR, H5E_CANTCREATE, FAIL, "can't create object header proxy")
-    } /* end if */
-    else
-        oh->proxy = NULL;
-
-    /* Set initial status flags */
-    oh->flags = oh_flags;
-
-    /* Initialize version-specific fields */
-    if(oh->version > H5O_VERSION_1) {
-        /* Initialize all time fields with current time, if we are storing them */
-        if(oh->flags & H5O_HDR_STORE_TIMES)
-            oh->atime = oh->mtime = oh->ctime = oh->btime = H5_now();
-        else
-            oh->atime = oh->mtime = oh->ctime = oh->btime = 0;
-
-        /* Make certain attribute creation order tracking is enabled if
-         *      attributes can be shared in this file.
-         */
-        if(store_msg_crt_idx)
-            oh->flags |= H5O_HDR_ATTR_CRT_ORDER_TRACKED;
-
-        /* Retrieve attribute storage phase change values from property list */
-        if(H5P_get(oc_plist, H5O_CRT_ATTR_MAX_COMPACT_NAME, &oh->max_compact) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get max. # of compact attributes")
-        if(H5P_get(oc_plist, H5O_CRT_ATTR_MIN_DENSE_NAME, &oh->min_dense) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get min. # of dense attributes")
-
-        /* Check for non-default attribute storage phase change values */
-        if(oh->max_compact != H5O_CRT_ATTR_MAX_COMPACT_DEF || oh->min_dense != H5O_CRT_ATTR_MIN_DENSE_DEF)
-            oh->flags |= H5O_HDR_ATTR_STORE_PHASE_CHANGE;
-
-        /* Determine correct value for chunk #0 size bits */
-/* Avoid compiler warning on 32-bit machines */
-#if H5_SIZEOF_SIZE_T > H5_SIZEOF_INT32_T
-        if(size_hint > 4294967295UL)
-            oh->flags |= H5O_HDR_CHUNK0_8;
-        else
-#endif /* H5_SIZEOF_SIZE_T > H5_SIZEOF_INT32_T */
-        if(size_hint > 65535)
-            oh->flags |= H5O_HDR_CHUNK0_4;
-        else if(size_hint > 255)
-            oh->flags |= H5O_HDR_CHUNK0_2;
-    } /* end if */
-    else {
-        /* Reset unused time fields */
-        oh->atime = oh->mtime = oh->ctime = oh->btime = 0;
-    } /* end else */
-
-    /* Compute total size of initial object header */
-    /* (i.e. object header prefix and first chunk) */
-    oh_size = (size_t)H5O_SIZEOF_HDR(oh) + size_hint;
-
-    /* Allocate disk space for header and first chunk */
-    if(HADDR_UNDEF == (oh_addr = H5MF_alloc(f, H5FD_MEM_OHDR, dxpl_id, (hsize_t)oh_size)))
-        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "file allocation failed for object header")
-
-    /* Create the chunk list */
-    oh->nchunks = oh->alloc_nchunks = 1;
-    if(NULL == (oh->chunk = H5FL_SEQ_MALLOC(H5O_chunk_t, (size_t)oh->alloc_nchunks)))
-        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
-
-    /* Initialize the first chunk */
-    oh->chunk[0].addr = oh_addr;
-    oh->chunk[0].size = oh_size;
-    oh->chunk[0].gap = 0;
-
-    /* Allocate enough space for the first chunk */
-    /* (including space for serializing the object header prefix */
-    if(NULL == (oh->chunk[0].image = H5FL_BLK_CALLOC(chunk_image, oh_size)))
-        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
-    oh->chunk[0].chunk_proxy = NULL;
-
-    /* Put magic # for object header in first chunk */
-    if(oh->version > H5O_VERSION_1)
-        HDmemcpy(oh->chunk[0].image, H5O_HDR_MAGIC, (size_t)H5_SIZEOF_MAGIC);
-
-    /* Create the message list */
-    oh->nmesgs = 1;
-    oh->alloc_nmesgs = H5O_NMESGS;
-    if(NULL == (oh->mesg = H5FL_SEQ_CALLOC(H5O_mesg_t, oh->alloc_nmesgs)))
-        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
-
-    /* Initialize the initial "null" message, covering the entire first chunk */
-    oh->mesg[0].type = H5O_MSG_NULL;
-    oh->mesg[0].dirty = TRUE;
-    oh->mesg[0].native = NULL;
-    oh->mesg[0].raw = oh->chunk[0].image + (H5O_SIZEOF_HDR(oh) - H5O_SIZEOF_CHKSUM_OH(oh)) + H5O_SIZEOF_MSGHDR_OH(oh);
-    oh->mesg[0].raw_size = size_hint - (size_t)H5O_SIZEOF_MSGHDR_OH(oh);
-    oh->mesg[0].chunkno = 0;
-
-    /* Check for non-zero initial refcount on the object header */
-    if(initial_rc > 0) {
-        /* Set the initial refcount & pin the header when its inserted */
-        oh->rc = initial_rc;
-        insert_flags |= H5AC__PIN_ENTRY_FLAG;
-    } /* end if */
-
-    /* Set metadata tag in dxpl_id */
-    H5_BEGIN_TAG(dxpl_id, oh_addr, FAIL);
-
-    /* Cache object header */
-    if(H5AC_insert_entry(f, dxpl_id, H5AC_OHDR, oh_addr, oh, insert_flags) < 0)
-        HGOTO_ERROR_TAG(H5E_OHDR, H5E_CANTINSERT, FAIL, "unable to cache object header")
-
-    /* Reset object header pointer, now that it's been inserted into the cache */
-    oh = NULL;
-
-    /* Reset metadata tag in dxpl_id */
-    H5_END_TAG(FAIL);
-
-    /* Set up object location */
-    loc->file = f;
-    loc->addr = oh_addr;
-
-    /* Open it */
-    if(H5O_open(loc) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTOPENOBJ, FAIL, "unable to open object header")
-
-done:
-    if(ret_value < 0 && oh)
-        if(H5O__free(oh) < 0)
-	    HDONE_ERROR(H5E_OHDR, H5E_CANTFREE, FAIL, "unable to destroy object header data")
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_create() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_open
- *
- * Purpose:	Opens an object header which is described by the symbol table
- *		entry OBJ_ENT.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Robb Matzke
- *		Monday, January	 5, 1998
- *
- * Modification:
- *              Raymond Lu
- *              5 November 2007
- *              Turn off the holding file variable if it's on.  When it's
- *              needed, the caller will turn it on again.
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_open(H5O_loc_t *loc)
-{
-    herr_t ret_value = SUCCEED;         /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* Check args */
-    HDassert(loc);
-    HDassert(loc->file);
-
-#ifdef H5O_DEBUG
-    if(H5DEBUG(O))
-	HDfprintf(H5DEBUG(O), "> %a\n", loc->addr);
-#endif
-
-    /* Turn off the variable for holding file or increment open-lock counters */
-    if(loc->holding_file)
-     	loc->holding_file = FALSE;
-    else
-        H5F_INCR_NOPEN_OBJS(loc->file);
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_open() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_open_name
- *
- * Purpose:	Opens an object within an HDF5 file.
- *
- * Return:	Success:	An open object identifier
- *		Failure:	Negative
- *
- * Programmer:	Quincey Koziol
- *		March  5 2007
- *
- *-------------------------------------------------------------------------
- */
-hid_t
-H5O_open_name(H5G_loc_t *loc, const char *name, hid_t lapl_id, hid_t dxpl_id, hbool_t app_ref)
-{
-    H5G_loc_t   obj_loc;                /* Location used to open group */
-    H5G_name_t  obj_path;            	/* Opened object group hier. path */
-    H5O_loc_t   obj_oloc;            	/* Opened object object location */
-    hbool_t     loc_found = FALSE;      /* Entry at 'name' found */
-    hid_t       ret_value = FAIL;
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* Check args */
-    HDassert(loc);
-    HDassert(name && *name);
-
-    /* Set up opened group location to fill in */
-    obj_loc.oloc = &obj_oloc;
-    obj_loc.path = &obj_path;
-    H5G_loc_reset(&obj_loc);
-
-    /* Find the object's location */
-    if(H5G_loc_find(loc, name, &obj_loc/*out*/, lapl_id, dxpl_id) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, FAIL, "object not found")
-    loc_found = TRUE;
-
-    /* Open the object */
-    if((ret_value = H5O_open_by_loc(&obj_loc, lapl_id, dxpl_id, app_ref)) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTOPENOBJ, FAIL, "unable to open object")
-
-done:
-    if(ret_value < 0 && loc_found)
-        if(H5G_loc_free(&obj_loc) < 0)
-            HDONE_ERROR(H5E_OHDR, H5E_CANTRELEASE, FAIL, "can't free location")
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_open_name() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_open_by_loc
- *
- * Purpose:	Opens an object and returns an ID given its group loction.
- *
- * Return:	Success:	Open object identifier
- *		Failure:	Negative
- *
- * Programmer:	James Laird
- *		July 25 2006
- *
- *-------------------------------------------------------------------------
- */
-hid_t
-H5O_open_by_loc(const H5G_loc_t *obj_loc, hid_t lapl_id, hid_t dxpl_id, hbool_t app_ref)
-{
-    const H5O_obj_class_t *obj_class;   /* Class of object for location */
-    hid_t               ret_value = H5I_INVALID_HID;    /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    HDassert(obj_loc);
-
-    /* Get the object class for this location */
-    if(NULL == (obj_class = H5O_obj_class(obj_loc->oloc, dxpl_id)))
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "unable to determine object class")
-
-    /* Call the object class's 'open' routine */
-    HDassert(obj_class->open);
-    if((ret_value = obj_class->open(obj_loc, lapl_id, dxpl_id, app_ref)) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTOPENOBJ, FAIL, "unable to open object")
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_open_by_loc() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_close
- *
- * Purpose:	Closes an object header that was previously open.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Robb Matzke
- *		Monday, January	 5, 1998
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_close(H5O_loc_t *loc, hbool_t *file_closed /*out*/)
-{
-    herr_t ret_value = SUCCEED;   /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* Check args */
-    HDassert(loc);
-    HDassert(loc->file);
-    HDassert(H5F_NOPEN_OBJS(loc->file) > 0);
-
-    /* Set the file_closed flag to the default value.
-     * This flag lets downstream code know if the file struct is
-     * still accessible and/or likely to contain useful data.
-     * It's needed by the evict-on-close code. Clients can ignore
-     * this value by passing in NULL.
-     */
-    if(file_closed)
-        *file_closed = FALSE;
-
-    /* Decrement open-lock counters */
-    H5F_DECR_NOPEN_OBJS(loc->file);
-
-#ifdef H5O_DEBUG
-    if(H5DEBUG(O)) {
-	if(H5F_FILE_ID(loc->file)< 0 && 1 == H5F_NREFS(loc->file))
-	    HDfprintf(H5DEBUG(O), "< %a auto %lu remaining\n",
-		      loc->addr,
-		      (unsigned long)H5F_NOPEN_OBJS(loc->file));
-	else
-	    HDfprintf(H5DEBUG(O), "< %a\n", loc->addr);
-    } /* end if */
-#endif
-
-    /*
-     * If the file open object count has reached the number of open mount points
-     * (each of which has a group open in the file) attempt to close the file.
-     */
-    if(H5F_NOPEN_OBJS(loc->file) == H5F_NMOUNTS(loc->file))
-        /* Attempt to close down the file hierarchy */
-        if(H5F_try_close(loc->file, file_closed) < 0)
-            HGOTO_ERROR(H5E_OHDR, H5E_CANTCLOSEFILE, FAIL, "problem attempting file close")
-
-    /* Release location information */
-    if(H5O_loc_free(loc) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTRELEASE, FAIL, "problem attempting to free location")
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_close() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_link_oh
- *
- * Purpose:	Adjust the link count for an open object header by adding
- *		ADJUST to the link count.
- *
- * Return:	Success:	New link count
- *
- *		Failure:	Negative
- *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Aug  5 1997
- *
- *-------------------------------------------------------------------------
- */
-int
-H5O_link_oh(H5F_t *f, int adjust, hid_t dxpl_id, H5O_t *oh, hbool_t *deleted)
-{
-    haddr_t addr = H5O_OH_GET_ADDR(oh);     /* Object header address */
-    int	ret_value = -1;                     /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* check args */
-    HDassert(f);
-    HDassert(oh);
-    HDassert(deleted);
-
-    /* Check for adjusting link count */
-    if(adjust) {
-        if(adjust < 0) {
-            /* Check for too large of an adjustment */
-            if((unsigned)(-adjust) > oh->nlink)
-                HGOTO_ERROR(H5E_OHDR, H5E_LINKCOUNT, FAIL, "link count would be negative")
-
-            /* Adjust the link count for the object header */
-            oh->nlink = (unsigned)((int)oh->nlink + adjust);
-
-            /* Mark object header as dirty in cache */
-            if(H5AC_mark_entry_dirty(oh) < 0)
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTMARKDIRTY, FAIL, "unable to mark object header as dirty")
-
-            /* Check if the object should be deleted */
-            if(oh->nlink == 0) {
-                /* Check if the object is still open by the user */
-                if(H5FO_opened(f, addr) != NULL) {
-                    /* Flag the object to be deleted when it's closed */
-                    if(H5FO_mark(f, addr, TRUE) < 0)
-                        HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "can't mark object for deletion")
-                } /* end if */
-                else {
-                    /* Mark the object header for deletion */
-                    *deleted = TRUE;
-                } /* end else */
-            } /* end if */
-        } /* end if */
-        else {
-            /* A new object, or one that will be deleted */
-            if(0 == oh->nlink) {
-                /* Check if the object is currently open, but marked for deletion */
-                if(H5FO_marked(f, addr)) {
-                    /* Remove "delete me" flag on the object */
-                    if(H5FO_mark(f, addr, FALSE) < 0)
-                        HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "can't mark object for deletion")
-                } /* end if */
-            } /* end if */
-
-            /* Adjust the link count for the object header */
-            oh->nlink = (unsigned)((int)oh->nlink + adjust);
-
-            /* Mark object header as dirty in cache */
-            if(H5AC_mark_entry_dirty(oh) < 0)
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTMARKDIRTY, FAIL, "unable to mark object header as dirty")
-        } /* end if */
-
-        /* Check for operations on refcount message */
-        if(oh->version > H5O_VERSION_1) {
-            /* Check if the object has a refcount message already */
-            if(oh->has_refcount_msg) {
-                /* Check for removing refcount message */
-                if(oh->nlink <= 1) {
-                    if(H5O_msg_remove_real(f, oh, H5O_MSG_REFCOUNT, H5O_ALL, NULL, NULL, TRUE, dxpl_id) < 0)
-                        HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "unable to delete refcount message")
-                    oh->has_refcount_msg = FALSE;
-                } /* end if */
-                /* Update refcount message with new link count */
-                else {
-                    H5O_refcount_t refcount = oh->nlink;
-
-                    if(H5O_msg_write_real(f, dxpl_id, oh, H5O_MSG_REFCOUNT, H5O_MSG_FLAG_DONTSHARE, 0, &refcount) < 0)
-                        HGOTO_ERROR(H5E_OHDR, H5E_CANTUPDATE, FAIL, "unable to update refcount message")
-                } /* end else */
-            } /* end if */
-            else {
-                /* Check for adding refcount message to object */
-                if(oh->nlink > 1) {
-                    H5O_refcount_t refcount = oh->nlink;
-
-                    if(H5O_msg_append_real(f, dxpl_id, oh, H5O_MSG_REFCOUNT, H5O_MSG_FLAG_DONTSHARE, 0, &refcount) < 0)
-                        HGOTO_ERROR(H5E_OHDR, H5E_CANTINSERT, FAIL, "unable to create new refcount message")
-                    oh->has_refcount_msg = TRUE;
-                } /* end if */
-            } /* end else */
-        } /* end if */
-    } /* end if */
-
-    /* Set return value */
-    ret_value = (int)oh->nlink;
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_link_oh() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_link
- *
- * Purpose:	Adjust the link count for an object header by adding
- *		ADJUST to the link count.
- *
- * Return:	Success:	New link count
- *
- *		Failure:	Negative
- *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Aug  5 1997
- *
- *-------------------------------------------------------------------------
- */
-int
-H5O_link(const H5O_loc_t *loc, int adjust, hid_t dxpl_id)
-{
-    H5O_t	*oh = NULL;
-    hbool_t deleted = FALSE;            /* Whether the object was deleted */
-    int	ret_value = -1;                 /* Return value */
-
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, loc->addr, FAIL)
-
-    /* check args */
-    HDassert(loc);
-    HDassert(loc->file);
-    HDassert(H5F_addr_defined(loc->addr));
-
-    /* Pin the object header */
-    if(NULL == (oh = H5O_pin(loc, dxpl_id)))
-	HGOTO_ERROR(H5E_OHDR, H5E_CANTPIN, FAIL, "unable to pin object header")
-
-    /* Call the "real" link routine */
-    if((ret_value = H5O_link_oh(loc->file, adjust, dxpl_id, oh, &deleted)) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_LINKCOUNT, FAIL, "unable to adjust object link count")
-
-done:
-    if(oh && H5O_unpin(oh) < 0)
-	HDONE_ERROR(H5E_OHDR, H5E_CANTUNPIN, FAIL, "unable to unpin object header")
-    if(ret_value >= 0 && deleted && H5O_delete(loc->file, dxpl_id, loc->addr) < 0)
-        HDONE_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "can't delete object from file")
-
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
-} /* end H5O_link() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_protect
- *
- * Purpose:	Wrapper around H5AC_protect for use during a H5O_protect->
- *              H5O_msg_append->...->H5O_msg_append->H5O_unprotect sequence of calls
- *              during an object's creation.
- *
- * Return:	Success:	Pointer to the object header structure for the
- *                              object.
- *		Failure:	NULL
- *
- * Programmer:	Quincey Koziol
- *		koziol@ncsa.uiuc.edu
- *		Dec 31 2002
- *
- *-------------------------------------------------------------------------
- */
-H5O_t *
-H5O_protect(const H5O_loc_t *loc, hid_t dxpl_id, unsigned prot_flags,
-    hbool_t pin_all_chunks)
-{
-    H5O_t *oh = NULL;           /* Object header protected */
-    H5O_cache_ud_t udata;       /* User data for protecting object header */
-    H5O_cont_msgs_t cont_msg_info;      /* Continuation message info */
-    unsigned file_intent;       /* R/W intent on file */
-    H5O_t *ret_value = NULL;    /* Return value */
-
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, loc->addr, NULL)
-
-    /* check args */
-    HDassert(loc);
-    HDassert(loc->file);
-
-    /* prot_flags may only contain the H5AC__READ_ONLY_FLAG */
-    HDassert((prot_flags & (unsigned)(~H5AC__READ_ONLY_FLAG)) == 0);
-
-    /* Check for valid address */
-    if(!H5F_addr_defined(loc->addr))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, NULL, "address undefined")
-
-    /* Check for write access on the file */
-    file_intent = H5F_INTENT(loc->file);
-    if((0 == (prot_flags & H5AC__READ_ONLY_FLAG)) && (0 == (file_intent & H5F_ACC_RDWR)))
-	HGOTO_ERROR(H5E_OHDR, H5E_BADVALUE, NULL, "no write intent on file")
-
-    /* Construct the user data for protect callback */
-    udata.made_attempt = FALSE;
-    udata.v1_pfx_nmesgs = 0;
-    udata.chunk0_size = 0;
-    udata.oh = NULL;
-    udata.common.f = loc->file;
-    udata.common.dxpl_id = dxpl_id;
-    udata.common.file_intent = file_intent;
-    udata.common.merged_null_msgs = 0;
-    HDmemset(&cont_msg_info, 0, sizeof(cont_msg_info));
-    udata.common.cont_msg_info = &cont_msg_info;
-    udata.common.addr = loc->addr;
-
-    /* Lock the object header into the cache */
-    if(NULL == (oh = (H5O_t *)H5AC_protect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, &udata, prot_flags)))
-	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, NULL, "unable to load object header")
-
-    /* Check if there are any continuation messages to process */
-    if(cont_msg_info.nmsgs > 0) {
-        size_t curr_msg;        /* Current continuation message to process */
-        H5O_chk_cache_ud_t chk_udata;   /* User data for loading chunk */
-
-        /* Sanity check - we should only have continuation messages to process
-         *      when the object header is actually loaded from the file.
-         */
-        HDassert(udata.made_attempt == TRUE);
-        HDassert(cont_msg_info.msgs);
-
-        /* Construct the user data for protecting chunks */
-        chk_udata.decoding = TRUE;
-        chk_udata.oh = oh;
-        chk_udata.chunkno = UINT_MAX;   /* Set to invalid value, for better error detection */
-        chk_udata.common.f = loc->file;
-        chk_udata.common.dxpl_id = dxpl_id;
-        chk_udata.common.file_intent = file_intent;
-        chk_udata.common.merged_null_msgs = udata.common.merged_null_msgs;
-        chk_udata.common.cont_msg_info = &cont_msg_info;
-
-        /* Read in continuation messages, until there are no more */
-        /* (Note that loading chunks could increase the # of continuation
-         *      messages if new ones are found - QAK, 19/11/2016)
-         */
-        curr_msg = 0;
-        while(curr_msg < cont_msg_info.nmsgs) {
-            H5O_chunk_proxy_t *chk_proxy;       /* Proxy for chunk, to bring it into memory */
-#ifndef NDEBUG
-            size_t chkcnt = oh->nchunks;      /* Count of chunks (for sanity checking) */
-#endif /* NDEBUG */
-
-            /* Bring the chunk into the cache */
-            /* (which adds to the object header) */
-            chk_udata.common.addr = cont_msg_info.msgs[curr_msg].addr;
-            chk_udata.size = cont_msg_info.msgs[curr_msg].size;
-            if(NULL == (chk_proxy = (H5O_chunk_proxy_t *)H5AC_protect(loc->file, dxpl_id, H5AC_OHDR_CHK, cont_msg_info.msgs[curr_msg].addr, &chk_udata, prot_flags)))
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, NULL, "unable to load object header chunk")
-
-            /* Sanity check */
-            HDassert(chk_proxy->oh == oh);
-            HDassert(chk_proxy->chunkno == chkcnt);
-            HDassert(oh->nchunks == (chkcnt + 1));
-
-            /* Release the chunk from the cache */
-            if(H5AC_unprotect(loc->file, dxpl_id, H5AC_OHDR_CHK, cont_msg_info.msgs[curr_msg].addr, chk_proxy, H5AC__NO_FLAGS_SET) < 0)
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, NULL, "unable to release object header chunk")
-
-            /* Advance to next continuation message */
-            curr_msg++;
-        } /* end while */
-
-        /* Release any continuation messages built up */
-        cont_msg_info.msgs = (H5O_cont_t *)H5FL_SEQ_FREE(H5O_cont_t, cont_msg_info.msgs);
-
-        /* Pass back out some of the chunk's user data */
-        udata.common.merged_null_msgs = chk_udata.common.merged_null_msgs;
-    } /* end if */
-
-    /* Check for incorrect # of object header messages, if we've just loaded
-     *  this object header from the file
-     */
-    if(udata.made_attempt) {
-/* Don't enforce the error on an incorrect # of object header messages bug
- *      unless strict format checking is enabled.  This allows for older
- *      files, created with a version of the library that had a bug in tracking
- *      the correct # of header messages to be read in without the library
- *      erroring out here. -QAK
- */
-#ifdef H5_STRICT_FORMAT_CHECKS
-        /* Check for incorrect # of messages in v1 object header */
-        if(oh->version == H5O_VERSION_1 &&
-                (oh->nmesgs + udata.common.merged_null_msgs) != udata.v1_pfx_nmesgs)
-            HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, NULL, "corrupt object header - incorrect # of messages")
-#endif /* H5_STRICT_FORMAT_CHECKS */
-    } /* end if */
-
-#ifdef H5O_DEBUG
-H5O_assert(oh);
-#endif /* H5O_DEBUG */
-
-    /* Pin the other chunks also when requested, so that the object header
-     *  proxy can be set up.
-     */
-    if(pin_all_chunks && oh->nchunks > 1) {
-        unsigned u;         /* Local index variable */
-
-        /* Sanity check */
-        HDassert(oh->swmr_write);
-
-        /* Iterate over chunks > 0 */
-        for(u = 1; u < oh->nchunks; u++) {
-            H5O_chunk_proxy_t *chk_proxy;       /* Chunk proxy */
-
-            /* Protect chunk */
-            if(NULL == (chk_proxy = H5O_chunk_protect(loc->file, dxpl_id, oh, u)))
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, NULL, "unable to protect object header chunk")
-
-            /* Pin chunk proxy*/
-            if(H5AC_pin_protected_entry(chk_proxy) < 0 )
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTPIN, NULL, "unable to pin object header chunk")
-
-            /* Unprotect chunk */
-            if(H5O_chunk_unprotect(loc->file, dxpl_id, chk_proxy, FALSE) < 0)
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, NULL, "unable to unprotect object header chunk")
-
-            /* Preserve chunk proxy pointer for later */
-            oh->chunk[u].chunk_proxy = chk_proxy;
-        } /* end for */
-
-        /* Set the flag for the unprotect */
-        oh->chunks_pinned = TRUE;
-    } /* end if */
-
-    /* Set return value */
-    ret_value = oh;
-
-done:
-    if(ret_value == NULL && oh)
-        if(H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
-            HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, NULL, "unable to release object header")
-
-    FUNC_LEAVE_NOAPI_TAG(ret_value, NULL)
-} /* end H5O_protect() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_pin
- *
- * Purpose:	Pin an object header down for use during a sequence of message
- *              operations, which prevents the object header from being
- *              evicted from the cache.
- *
- * Return:	Success:	Pointer to the object header structure for the
- *                              object.
- *		Failure:	NULL
- *
- * Programmer:	Quincey Koziol
- *		koziol@hdfgroup.org
- *		Jul 13 2008
- *
- *-------------------------------------------------------------------------
- */
-H5O_t *
-H5O_pin(const H5O_loc_t *loc, hid_t dxpl_id)
-{
-    H5O_t       *oh = NULL;             /* Object header */
-    H5O_t       *ret_value = NULL;      /* Return value */
-
-    FUNC_ENTER_NOAPI(NULL)
-
-    /* check args */
-    HDassert(loc);
-
-    /* Get header */
-    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__NO_FLAGS_SET, FALSE)))
-	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, NULL, "unable to protect object header")
-
-    /* Increment the reference count on the object header */
-    /* (which will pin it, if appropriate) */
-    if(H5O_inc_rc(oh) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTINC, NULL, "unable to increment reference count on object header")
-
-    /* Set the return value */
-    ret_value = oh;
-
-done:
-    /* Release the object header from the cache */
-    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
-        HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, NULL, "unable to release object header")
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_pin() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_unpin
- *
- * Purpose:	Unpin an object header, allowing it to be evicted from the
- *              metadata cache.
- *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
- *
- * Programmer:	Quincey Koziol
- *		koziol@hdfgroup.org
- *		Jul 13 2008
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_unpin(H5O_t *oh)
-{
-    herr_t ret_value = SUCCEED;      /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* check args */
-    HDassert(oh);
-
-    /* Decrement the reference count on the object header */
-    /* (which will unpin it, if appropriate) */
-    if(H5O_dec_rc(oh) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTDEC, FAIL, "unable to decrement reference count on object header")
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_unpin() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_unprotect
- *
- * Purpose:	Wrapper around H5AC_unprotect for use during a H5O_protect->
- *              H5O_msg_append->...->H5O_msg_append->H5O_unprotect sequence of calls
- *              during an object's creation.
- *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
- *
- * Programmer:	Quincey Koziol
- *		koziol@ncsa.uiuc.edu
- *		Dec 31 2002
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_unprotect(const H5O_loc_t *loc, hid_t dxpl_id, H5O_t *oh, unsigned oh_flags)
-{
-    herr_t ret_value = SUCCEED;      /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* check args */
-    HDassert(loc);
-    HDassert(oh);
-
-    /* Unpin the other chunks */
-    if(oh->chunks_pinned && oh->nchunks > 1) {
-        unsigned u;         /* Local index variable */
-
-        /* Sanity check */
-        HDassert(oh->swmr_write);
-
-        /* Iterate over chunks > 0 */
-        for(u = 1; u < oh->nchunks; u++) {
-            if(NULL != oh->chunk[u].chunk_proxy) {
-                /* Release chunk proxy */
-                if(H5AC_unpin_entry(oh->chunk[u].chunk_proxy) < 0)
-                    HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPIN, FAIL, "unable to unpin object header chunk")
-                oh->chunk[u].chunk_proxy = NULL;
-            } /* end if */
-        } /* end for */
-
-        /* Reet the flag from the unprotect */
-        oh->chunks_pinned = FALSE;
-    } /* end if */
-
-    /* Unprotect the object header */
-    if(H5AC_unprotect(loc->file, dxpl_id, H5AC_OHDR, oh->chunk[0].addr, oh, oh_flags) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_unprotect() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_touch_oh
- *
- * Purpose:	If FORCE is non-zero then create a modification time message
- *		unless one already exists.  Then update any existing
- *		modification time message with the current time.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Robb Matzke
- *              Monday, July 27, 1998
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_touch_oh(H5F_t *f, hid_t dxpl_id, H5O_t *oh, hbool_t force)
-{
-    H5O_chunk_proxy_t *chk_proxy = NULL;        /* Chunk that message is in */
-    hbool_t chk_dirtied = FALSE;        /* Flag for unprotecting chunk */
-    time_t	now;                    /* Current time */
-    herr_t      ret_value = SUCCEED;    /* Return value */
-
-    FUNC_ENTER_NOAPI_NOINIT
-
-    HDassert(f);
-    HDassert(oh);
-
-    /* Check if this object header is tracking times */
-    if(oh->flags & H5O_HDR_STORE_TIMES) {
-        /* Get current time */
-        now = H5_now();
-
-        /* Check version, to determine how to store time information */
-        if(oh->version == H5O_VERSION_1) {
-            size_t	idx;                    /* Index of modification time message to update */
-
-            /* Look for existing message */
-            for(idx = 0; idx < oh->nmesgs; idx++)
-                if(H5O_MSG_MTIME == oh->mesg[idx].type || H5O_MSG_MTIME_NEW == oh->mesg[idx].type)
-                    break;
-
-            /* Create a new message, if necessary */
-            if(idx == oh->nmesgs) {
-                unsigned mesg_flags = 0;        /* Flags for message in object header */
-
-                /* If we would have to create a new message, but we aren't 'forcing' it, get out now */
-                if(!force)
-                    HGOTO_DONE(SUCCEED);        /*nothing to do*/
-
-                /* Allocate space for the modification time message */
-                if(H5O_msg_alloc(f, dxpl_id, oh, H5O_MSG_MTIME_NEW, &mesg_flags, &now, &idx) < 0)
-                    HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to allocate space for modification time message")
-
-                /* Set the message's flags if appropriate */
-                oh->mesg[idx].flags = (uint8_t)mesg_flags;
-            } /* end if */
-
-            /* Protect chunk */
-            if(NULL == (chk_proxy = H5O_chunk_protect(f, dxpl_id, oh, oh->mesg[idx].chunkno)))
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header chunk")
-
-            /* Allocate 'native' space, if necessary */
-            if(NULL == oh->mesg[idx].native) {
-                if(NULL == (oh->mesg[idx].native = H5FL_MALLOC(time_t)))
-                    HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "memory allocation failed for modification time message")
-            } /* end if */
-
-            /* Update the message */
-            *((time_t *)(oh->mesg[idx].native)) = now;
-
-            /* Mark the message as dirty */
-            oh->mesg[idx].dirty = TRUE;
-            chk_dirtied = TRUE;
-        } /* end if */
-        else {
-            /* XXX: For now, update access time & change fields in the object header */
-            /* (will need to add some code to update modification time appropriately) */
-            oh->atime = oh->ctime = now;
-
-            /* Mark object header as dirty in cache */
-            if(H5AC_mark_entry_dirty(oh) < 0)
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTMARKDIRTY, FAIL, "unable to mark object header as dirty")
-        } /* end else */
-    } /* end if */
-
-done:
-    /* Release chunk */
-    if(chk_proxy && H5O_chunk_unprotect(f, dxpl_id, chk_proxy, chk_dirtied) < 0)
-        HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to unprotect object header chunk")
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_touch_oh() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_touch
- *
- * Purpose:	Touch an object by setting the modification time to the
- *		current time and marking the object as dirty.  Unless FORCE
- *		is non-zero, nothing happens if there is no MTIME message in
- *		the object header.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Robb Matzke
- *              Monday, July 27, 1998
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_touch(const H5O_loc_t *loc, hbool_t force, hid_t dxpl_id)
-{
-    H5O_t	*oh = NULL;             /* Object header to modify */
-    unsigned 	oh_flags = H5AC__NO_FLAGS_SET; /* Flags for unprotecting object header */
-    herr_t      ret_value = SUCCEED;    /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* check args */
-    HDassert(loc);
-
-    /* Get the object header */
-    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__NO_FLAGS_SET, FALSE)))
-	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
-
-    /* Create/Update the modification time message */
-    if(H5O_touch_oh(loc->file, dxpl_id, oh, force) < 0)
-	HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "unable to update object modificaton time")
-
-    /* Mark object header as changed */
-    oh_flags |= H5AC__DIRTIED_FLAG;
-
-done:
-    if(oh && H5O_unprotect(loc, dxpl_id, oh, oh_flags) < 0)
-	HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_touch() */
-
-#ifdef H5O_ENABLE_BOGUS
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_bogus_oh
- *
- * Purpose:	Create a "bogus" message unless one already exists.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *              <koziol@ncsa.uiuc.edu>
- *              Tuesday, January 21, 2003
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_bogus_oh(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned bogus_id, unsigned mesg_flags)
-{
-    size_t	idx;                /* Local index variable */
-    H5O_msg_class_t *type;	    /* Message class type */
-    herr_t ret_value = SUCCEED;     /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    HDassert(f);
-    HDassert(oh);
-
-    /* Look for existing message */
-    for(idx = 0; idx < oh->nmesgs; idx++)
-	if(H5O_MSG_BOGUS_VALID == oh->mesg[idx].type || 
-	   H5O_MSG_BOGUS_INVALID == oh->mesg[idx].type)
-            break;
-
-    /* Create a new message */
-    if(idx == oh->nmesgs) {
-        H5O_bogus_t *bogus;             /* Pointer to the bogus information */
-
-        /* Allocate the native message in memory */
-	if(NULL == (bogus = H5MM_malloc(sizeof(H5O_bogus_t))))
-	    HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "memory allocation failed for 'bogus' message")
-
-        /* Update the native value */
-        bogus->u = H5O_BOGUS_VALUE;
-
-	if(bogus_id == H5O_BOGUS_VALID_ID)
-	    type = H5O_MSG_BOGUS_VALID;
-	else if(bogus_id == H5O_BOGUS_INVALID_ID)
-	    type = H5O_MSG_BOGUS_INVALID;
-	else
-	    HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "invalid ID for 'bogus' message")
-
-        /* Allocate space in the object header for bogus message */
-	if(H5O_msg_alloc(f, dxpl_id, oh, type, &mesg_flags, bogus, &idx) < 0)
-	    HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to allocate space for 'bogus' message")
-
-        /* Point to "bogus" information (take it over) */
-	oh->mesg[idx].native = bogus;
-
-        /* Set the appropriate flags for the message */
-        oh->mesg[idx].flags = mesg_flags;
-
-        /* Mark the message and object header as dirty */
-        oh->mesg[idx].dirty = TRUE;
-        oh->cache_info.is_dirty = TRUE;
-    } /* end if */
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_bogus_oh() */
-#endif /* H5O_ENABLE_BOGUS */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_delete
- *
- * Purpose:	Delete an object header from a file.  This frees the file
- *              space used for the object header (and it's continuation blocks)
- *              and also walks through each header message and asks it to
- *              remove all the pieces of the file referenced by the header.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *		koziol@ncsa.uiuc.edu
- *		Mar 19 2003
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_delete(H5F_t *f, hid_t dxpl_id, haddr_t addr)
-{
-    H5O_t *oh = NULL;           /* Object header information */
-    H5O_loc_t loc;              /* Object location for object to delete */
-    unsigned oh_flags = H5AC__NO_FLAGS_SET; /* Flags for unprotecting object header */
-    hbool_t corked;
-    herr_t ret_value = SUCCEED; /* Return value */
-
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, addr, FAIL)
-
-    /* Check args */
-    HDassert(f);
-    HDassert(H5F_addr_defined(addr));
-
-    /* Set up the object location */
-    loc.file = f;
-    loc.addr = addr;
-    loc.holding_file = FALSE;
-
-    /* Get the object header information */
-    if(NULL == (oh = H5O_protect(&loc, dxpl_id, H5AC__NO_FLAGS_SET, FALSE)))
-	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
-
-    /* Delete object */
-    if(H5O_delete_oh(f, dxpl_id, oh) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "can't delete object from file")
-
-    /* Uncork cache entries with tag: addr */
-    if(H5AC_cork(f, addr, H5AC__GET_CORKED, &corked) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "unable to retrieve an object's cork status")
-    if(corked)
-	if(H5AC_cork(f, addr, H5AC__UNCORK, NULL) < 0)
-	    HGOTO_ERROR(H5E_OHDR, H5E_CANTUNCORK, FAIL, "unable to uncork an object")
-
-    /* Mark object header as deleted */
-    oh_flags = H5AC__DIRTIED_FLAG | H5AC__DELETED_FLAG | H5AC__FREE_FILE_SPACE_FLAG;
-
-done:
-    if(oh && H5O_unprotect(&loc, dxpl_id, oh, oh_flags) < 0)
-	HDONE_ERROR(H5E_OHDR, H5E_PROTECT, FAIL, "unable to release object header")
-
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
-} /* end H5O_delete() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_delete_oh
- *
- * Purpose:	Internal function to:
- *              Delete an object header from a file.  This frees the file
- *              space used for the object header (and it's continuation blocks)
- *              and also walks through each header message and asks it to
- *              remove all the pieces of the file referenced by the header.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *		koziol@ncsa.uiuc.edu
- *		Mar 19 2003
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5O_delete_oh(H5F_t *f, hid_t dxpl_id, H5O_t *oh)
-{
-    H5O_mesg_t *curr_msg;       /* Pointer to current message being operated on */
-    unsigned	u;
-    herr_t ret_value = SUCCEED;   /* Return value */
-
-    FUNC_ENTER_NOAPI_NOINIT
-
-    /* Check args */
-    HDassert(f);
-    HDassert(oh);
-
-    /* Walk through the list of object header messages, asking each one to
-     * delete any file space used
-     */
-    for(u = 0, curr_msg = &oh->mesg[0]; u < oh->nmesgs; u++, curr_msg++) {
-        /* Free any space referred to in the file from this message */
-        if(H5O_delete_mesg(f, dxpl_id, oh, curr_msg) < 0)
-            HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "unable to delete file space for object header message")
-    } /* end for */
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_delete_oh() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_obj_type
- *
- * Purpose:	Retrieves the type of object pointed to by `loc'.
- *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
- *
- * Programmer:	Robb Matzke
- *              Wednesday, November  4, 1998
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_obj_type(const H5O_loc_t *loc, H5O_type_t *obj_type, hid_t dxpl_id)
-{
-    H5O_t	*oh = NULL;             /* Object header for location */
-    herr_t      ret_value = SUCCEED;    /* Return value */
-
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, loc->addr, FAIL)
-
-    /* Load the object header */
-    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
-	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
-
-    /* Retrieve the type of the object */
-    if(H5O_obj_type_real(oh, obj_type) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to determine object type")
-
-done:
-    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
-	HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
-
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
-} /* end H5O_obj_type() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_obj_type_real
- *
- * Purpose:	Returns the type of object pointed to by `oh'.
- *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
- *
- * Programmer:	Quincey Koziol
- *              Monday, November 21, 2005
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5O_obj_type_real(H5O_t *oh, H5O_type_t *obj_type)
-{
-    const H5O_obj_class_t *obj_class;           /* Class of object for header */
-
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
-
-    /* Sanity check */
-    HDassert(oh);
-    HDassert(obj_type);
-
-    /* Look up class for object header */
-    if(NULL == (obj_class = H5O_obj_class_real(oh))) {
-        /* Clear error stack from "failed" class lookup */
-        H5E_clear_stack(NULL);
-
-        /* Set type to "unknown" */
-        *obj_type = H5O_TYPE_UNKNOWN;
-    } /* end if */
-    else {
-        /* Set object type */
-        *obj_type = obj_class->type;
-    } /* end else */
-
-    FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_obj_type_real() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_obj_class
- *
- * Purpose:	Returns the class of object pointed to by `loc'.
- *
- * Return:	Success:	An object class
- *		Failure:	NULL
- *
- * Programmer:	Quincey Koziol
- *              Monday, November  6, 2006
- *
- *-------------------------------------------------------------------------
- */
-const H5O_obj_class_t *
-H5O_obj_class(const H5O_loc_t *loc, hid_t dxpl_id)
-{
-    H5O_t	*oh = NULL;                     /* Object header for location */
-    const H5O_obj_class_t *ret_value = NULL;    /* Return value */
-
-    FUNC_ENTER_NOAPI_NOINIT_TAG(dxpl_id, loc->addr, NULL)
-
-    /* Load the object header */
-    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
-	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, NULL, "unable to load object header")
-
-    /* Test whether entry qualifies as a particular type of object */
-    if(NULL == (ret_value = H5O_obj_class_real(oh)))
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, NULL, "unable to determine object type")
-
-done:
-    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
-	HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, NULL, "unable to release object header")
-
-    FUNC_LEAVE_NOAPI_TAG(ret_value, NULL)
-} /* end H5O_obj_class() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_obj_class_real
- *
- * Purpose:	Returns the class of object pointed to by `oh'.
- *
- * Return:	Success:	An object class
- *		Failure:	NULL
- *
- * Programmer:	Quincey Koziol
- *              Monday, November 21, 2005
- *
- *-------------------------------------------------------------------------
- */
-static const H5O_obj_class_t *
-H5O_obj_class_real(H5O_t *oh)
-{
-    size_t	i;                      /* Local index variable */
-    const H5O_obj_class_t *ret_value = NULL;   /* Return value */
-
-    FUNC_ENTER_NOAPI(NULL)
-
-    /* Sanity check */
-    HDassert(oh);
-
-    /* Test whether entry qualifies as a particular type of object */
-    /* (Note: loop is in reverse order, to test specific objects first) */
-    for(i = NELMTS(H5O_obj_class_g); i > 0; --i) {
-        htri_t	isa;            /* Is entry a particular type? */
-
-	if((isa = (H5O_obj_class_g[i - 1]->isa)(oh)) < 0)
-	    HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, NULL, "unable to determine object type")
-	else if(isa)
-	    HGOTO_DONE(H5O_obj_class_g[i - 1])
-    } /* end for */
-
-    if(0 == i)
-	HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, NULL, "unable to determine object type")
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_obj_class_real() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_get_loc
- *
- * Purpose:	Gets the object location for an object given its ID.
- *
- * Return:	Success:	Pointer to H5O_loc_t
- *		Failure:	NULL
- *
- * Programmer:	James Laird
- *		July 25 2006
- *
- *-------------------------------------------------------------------------
- */
-H5O_loc_t *
-H5O_get_loc(hid_t object_id)
-{
-    H5O_loc_t   *ret_value = NULL;      /* Return value */
-
-    FUNC_ENTER_NOAPI_NOINIT
-
-    switch(H5I_get_type(object_id)) {
-        case H5I_GROUP:
-            if(NULL == (ret_value = H5O_OBJ_GROUP->get_oloc(object_id)))
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, NULL, "unable to get object location from group ID")
-            break;
-
-        case H5I_DATASET:
-            if(NULL == (ret_value = H5O_OBJ_DATASET->get_oloc(object_id)))
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, NULL, "unable to get object location from dataset ID")
-            break;
-
-        case H5I_DATATYPE:
-            if(NULL == (ret_value = H5O_OBJ_DATATYPE->get_oloc(object_id)))
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, NULL, "unable to get object location from datatype ID")
-            break;
-
-        case H5I_UNINIT:
-        case H5I_BADID:
-        case H5I_FILE:
-        case H5I_DATASPACE:
-        case H5I_ATTR:
-        case H5I_REFERENCE:
-        case H5I_VFL:
-        case H5I_GENPROP_CLS:
-        case H5I_GENPROP_LST:
-        case H5I_ERROR_CLASS:
-        case H5I_ERROR_MSG:
-        case H5I_ERROR_STACK:
-        case H5I_NTYPES:
-        default:
-            HGOTO_ERROR(H5E_OHDR, H5E_BADTYPE, NULL, "invalid object type")
-    } /* end switch */
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_get_loc() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_loc_reset
- *
- * Purpose:	Reset a object location to an empty state
- *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
- *
- * Programmer:	Quincey Koziol
- *              Monday, September 19, 2005
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_loc_reset(H5O_loc_t *loc)
-{
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
-
-    /* Check arguments */
-    HDassert(loc);
-
-    /* Clear the object location to an empty state */
-    HDmemset(loc, 0, sizeof(H5O_loc_t));
-    loc->addr = HADDR_UNDEF;
-
-    FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_loc_reset() */
-
-
-/*-------------------------------------------------------------------------
- * Function:    H5O_loc_copy
- *
- * Purpose:     Copy object location information
- *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
- *
- * Programmer:	Quincey Koziol
- *              koziol@ncsa.uiuc.edu
- *              Monday, September 19, 2005
- *
- * Notes:       'depth' parameter determines how much of the group entry
- *              structure we want to copy.  The values are:
- *                  H5_COPY_SHALLOW - Copy all the field values from the source
- *                      to the destination, but not copying objects pointed to.
- *                      (Destination "takes ownership" of objects pointed to)
- *                  H5_COPY_DEEP - Copy all the fields from the source to
- *                      the destination, deep copying objects pointed to.
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_loc_copy(H5O_loc_t *dst, H5O_loc_t *src, H5_copy_depth_t depth)
-{
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
-
-    /* Check arguments */
-    HDassert(src);
-    HDassert(dst);
-    HDassert(depth == H5_COPY_SHALLOW || depth == H5_COPY_DEEP);
-
-    /* Copy the top level information */
-    HDmemcpy(dst, src, sizeof(H5O_loc_t));
-
-    /* Deep copy the names */
-    if(depth == H5_COPY_DEEP) {
-        /* If the original entry was holding open the file, this one should
-         * hold it open, too.
-         */
-        if(src->holding_file)
-            H5F_INCR_NOPEN_OBJS(dst->file);
-    } else if(depth == H5_COPY_SHALLOW) {
-        H5O_loc_reset(src);
-    } /* end if */
-
-    FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_loc_copy() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_loc_hold_file
- *
- * Purpose:	Have this object header hold a file open until it is
- *              released.
- *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
- *
- * Programmer:	James Laird
- *              Wednesday, August 16, 2006
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_loc_hold_file(H5O_loc_t *loc)
-{
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
-
-    /* Check arguments */
-    HDassert(loc);
-    HDassert(loc->file);
-
-    /* If this location is not already holding its file open, do so. */
-    if(!loc->holding_file) {
-        H5F_INCR_NOPEN_OBJS(loc->file);
-        loc->holding_file = TRUE;
-    } /* end if */
-
-    FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_loc_hold_file() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_loc_free
- *
- * Purpose:	Release resources used by this object header location.
- *              Not to be confused with H5O_close; this is used on
- *              locations that don't correspond to open objects.
- *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
- *
- * Programmer:	James Laird
- *              Wednesday, August 16, 2006
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_loc_free(H5O_loc_t *loc)
-{
-    herr_t ret_value = SUCCEED;
-
-    FUNC_ENTER_NOAPI_NOINIT
-
-    /* Check arguments */
-    HDassert(loc);
-
-    /* If this location is holding its file open try to close the file. */
-    if(loc->holding_file) {
-        H5F_DECR_NOPEN_OBJS(loc->file);
-        loc->holding_file = FALSE;
-        if(H5F_NOPEN_OBJS(loc->file) <= 0) {
-            if(H5F_try_close(loc->file, NULL) < 0)
-                HGOTO_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, FAIL, "can't close file")
-        } /* end if */
-    } /* end if */
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_loc_free() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_get_hdr_info
- *
- * Purpose:	Retrieve the object header information for an object
- *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
- *
- * Programmer:	Quincey Koziol
- *		September 22 2009
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_get_hdr_info(const H5O_loc_t *loc, hid_t dxpl_id, H5O_hdr_info_t *hdr)
-{
-    H5O_t *oh = NULL;                   /* Object header */
-    herr_t ret_value = SUCCEED;         /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* Check args */
-    HDassert(loc);
-    HDassert(hdr);
-
-    /* Reset the object header info structure */
-    HDmemset(hdr, 0, sizeof(*hdr));
-
-    /* Get the object header */
-    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
-	HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, FAIL, "unable to load object header")
-
-    /* Get the information for the object header */
-    if(H5O_get_hdr_info_real(oh, hdr) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't retrieve object header info")
-
-done:
-    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
-	HDONE_ERROR(H5E_OHDR, H5E_PROTECT, FAIL, "unable to release object header")
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_get_hdr_info() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_get_hdr_info_real
- *
- * Purpose:	Internal routine to retrieve the object header information for an object
- *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
- *
- * Programmer:	Quincey Koziol
- *		September 22 2009
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5O_get_hdr_info_real(const H5O_t *oh, H5O_hdr_info_t *hdr)
-{
-    const H5O_mesg_t *curr_msg;         /* Pointer to current message being operated on */
-    const H5O_chunk_t *curr_chunk;	/* Pointer to current message being operated on */
-    unsigned u;                         /* Local index variable */
-
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
-
-    /* Check args */
-    HDassert(oh);
-    HDassert(hdr);
-
-    /* Set the version for the object header */
-    hdr->version = oh->version;
-
-    /* Set the number of messages & chunks */
-    H5_CHECKED_ASSIGN(hdr->nmesgs, unsigned, oh->nmesgs, size_t);
-    H5_CHECKED_ASSIGN(hdr->nchunks, unsigned, oh->nchunks, size_t);
-
-    /* Set the status flags */
-    hdr->flags = oh->flags;
-
-    /* Iterate over all the messages, accumulating message size & type information */
-    hdr->space.meta = (hsize_t)H5O_SIZEOF_HDR(oh) + (hsize_t)(H5O_SIZEOF_CHKHDR_OH(oh) * (oh->nchunks - 1));
-    hdr->space.mesg = 0;
-    hdr->space.free = 0;
-    hdr->mesg.present = 0;
-    hdr->mesg.shared = 0;
-    for(u = 0, curr_msg = &oh->mesg[0]; u < oh->nmesgs; u++, curr_msg++) {
-        uint64_t type_flag;             /* Flag for message type */
-
-        /* Accumulate space usage information, based on the type of message */
-	if(H5O_NULL_ID == curr_msg->type->id)
-            hdr->space.free += (hsize_t)((size_t)H5O_SIZEOF_MSGHDR_OH(oh) + curr_msg->raw_size);
-        else if(H5O_CONT_ID == curr_msg->type->id)
-            hdr->space.meta += (hsize_t)((size_t)H5O_SIZEOF_MSGHDR_OH(oh) + curr_msg->raw_size);
-        else {
-            hdr->space.meta += (hsize_t)H5O_SIZEOF_MSGHDR_OH(oh);
-            hdr->space.mesg += curr_msg->raw_size;
-        } /* end else */
-
-        /* Set flag to indicate presence of message type */
-        type_flag = ((uint64_t)1) << curr_msg->type->id;
-        hdr->mesg.present |= type_flag;
-
-        /* Set flag if the message is shared in some way */
-        if(curr_msg->flags & H5O_MSG_FLAG_SHARED)                                   \
-            hdr->mesg.shared |= type_flag;
-    } /* end for */
-
-    /* Iterate over all the chunks, adding any gaps to the free space */
-    hdr->space.total = 0;
-    for(u = 0, curr_chunk = &oh->chunk[0]; u < oh->nchunks; u++, curr_chunk++) {
-        /* Accumulate the size of the header on disk */
-        hdr->space.total += curr_chunk->size;
-
-        /* If the chunk has a gap, add it to the free space */
-        hdr->space.free += curr_chunk->gap;
-    } /* end for */
-
-    /* Sanity check that all the bytes are accounted for */
-    HDassert(hdr->space.total == (hdr->space.free + hdr->space.meta + hdr->space.mesg));
-
-    FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_get_hdr_info_real() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_get_info
- *
- * Purpose:	Retrieve the information for an object
- *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
- *
- * Programmer:	Quincey Koziol
- *		November 21 2006
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_get_info(const H5O_loc_t *loc, hid_t dxpl_id, hbool_t want_ih_info,
-    H5O_info_t *oinfo)
-{
-    const H5O_obj_class_t *obj_class;   /* Class of object for header */
-    H5O_t *oh = NULL;                   /* Object header */
-    herr_t ret_value = SUCCEED;         /* Return value */
-
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, loc->addr, FAIL)
-
-    /* Check args */
-    HDassert(loc);
-    HDassert(oinfo);
-
-    /* Get the object header */
-    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
-	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
-
-    /* Reset the object info structure */
-    HDmemset(oinfo, 0, sizeof(*oinfo));
-
-    /* Retrieve the file's fileno */
-    H5F_GET_FILENO(loc->file, oinfo->fileno);
-
-    /* Set the object's address */
-    oinfo->addr = loc->addr;
-
-    /* Get class for object */
-    if(NULL == (obj_class = H5O_obj_class_real(oh)))
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "unable to determine object class")
-
-    /* Retrieve the type of the object */
-    oinfo->type = obj_class->type;
-
-    /* Set the object's reference count */
-    oinfo->rc = oh->nlink;
-
-    /* Get modification time for object */
-    if(oh->version > H5O_VERSION_1) {
-        oinfo->atime = oh->atime;
-        oinfo->mtime = oh->mtime;
-        oinfo->ctime = oh->ctime;
-        oinfo->btime = oh->btime;
-    } /* end if */
-    else {
-        htri_t	exists;                 /* Flag if header message of interest exists */
-
-        /* No information for access & modification fields */
-        /* (we stopped updating the "modification time" header message for
-         *      raw data changes, so the "modification time" header message
-         *      is closest to the 'change time', in POSIX terms - QAK)
-         */
-        oinfo->atime = 0;
-        oinfo->mtime = 0;
-        oinfo->btime = 0;
-
-        /* Might be information for modification time */
-        if((exists = H5O_msg_exists_oh(oh, H5O_MTIME_ID)) < 0)
-            HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, FAIL, "unable to check for MTIME message")
-        if(exists > 0) {
-            /* Get "old style" modification time info */
-            if(NULL == H5O_msg_read_oh(loc->file, dxpl_id, oh, H5O_MTIME_ID, &oinfo->ctime))
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't read MTIME message")
-        } /* end if */
-        else {
-            /* Check for "new style" modification time info */
-            if((exists = H5O_msg_exists_oh(oh, H5O_MTIME_NEW_ID)) < 0)
-                HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, FAIL, "unable to check for MTIME_NEW message")
-            if(exists > 0) {
-                /* Get "new style" modification time info */
-                if(NULL == H5O_msg_read_oh(loc->file, dxpl_id, oh, H5O_MTIME_NEW_ID, &oinfo->ctime))
-                    HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't read MTIME_NEW message")
-            } /* end if */
-            else
-                oinfo->ctime = 0;
-        } /* end else */
-    } /* end else */
-
-    /* Get the information for the object header */
-    if(H5O_get_hdr_info_real(oh, &oinfo->hdr) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't retrieve object header info")
-
-    /* Retrieve # of attributes */
-    if(H5O_attr_count_real(loc->file, dxpl_id, oh, &oinfo->num_attrs) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't retrieve attribute count")
-
-    /* Get B-tree & heap metadata storage size, if requested */
-    if(want_ih_info) {
-        /* Check for 'bh_info' callback for this type of object */
-        if(obj_class->bh_info) {
-            /* Call the object's class 'bh_info' routine */
-            if((obj_class->bh_info)(loc, dxpl_id, oh, &oinfo->meta_size.obj) < 0)
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't retrieve object's btree & heap info")
-        } /* end if */
-
-        /* Get B-tree & heap info for any attributes */
-        if(oinfo->num_attrs > 0) {
-            if(H5O_attr_bh_info(loc->file, dxpl_id, oh, &oinfo->meta_size.attr) < 0)
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't retrieve attribute btree & heap info")
-        } /* end if */
-    } /* end if */
-
-done:
-    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
-	HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
-
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
-} /* end H5O_get_info() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_get_create_plist
- *
- * Purpose:	Retrieve the object creation properties for an object
- *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
- *
- * Programmer:	Quincey Koziol
- *		November 28 2006
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_get_create_plist(const H5O_loc_t *loc, hid_t dxpl_id, H5P_genplist_t *oc_plist)
-{
-    H5O_t *oh = NULL;                   /* Object header */
-    herr_t ret_value = SUCCEED;         /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* Check args */
-    HDassert(loc);
-    HDassert(oc_plist);
-
-    /* Get the object header */
-    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
-	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
-
-    /* Set property values, if they were used for the object */
-    if(oh->version > H5O_VERSION_1) {
-        uint8_t ohdr_flags;             /* "User-visible" object header status flags */
-
-        /* Set attribute storage values */
-        if(H5P_set(oc_plist, H5O_CRT_ATTR_MAX_COMPACT_NAME, &oh->max_compact) < 0)
-            HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set max. # of compact attributes in property list")
-        if(H5P_set(oc_plist, H5O_CRT_ATTR_MIN_DENSE_NAME, &oh->min_dense) < 0)
-            HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set min. # of dense attributes in property list")
-
-        /* Mask off non-"user visible" flags */
-        ohdr_flags = oh->flags & (H5O_HDR_ATTR_CRT_ORDER_TRACKED | H5O_HDR_ATTR_CRT_ORDER_INDEXED | H5O_HDR_STORE_TIMES);
-
-        /* Set object header flags */
-        if(H5P_set(oc_plist, H5O_CRT_OHDR_FLAGS_NAME, &ohdr_flags) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set object header flags")
-    } /* end if */
-
-done:
-    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
-	HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_get_create_plist() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_get_nlinks
- *
- * Purpose:	Retrieve the number of link messages read in from the file
- *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
- *
- * Programmer:	Quincey Koziol
- *		March 11 2007
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_get_nlinks(const H5O_loc_t *loc, hid_t dxpl_id, hsize_t *nlinks)
-{
-    H5O_t *oh = NULL;                   /* Object header */
-    herr_t ret_value = SUCCEED;         /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* Check args */
-    HDassert(loc);
-    HDassert(nlinks);
-
-    /* Get the object header */
-    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
-	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
-
-    /* Retrieve the # of link messages seen when the object header was loaded */
-    *nlinks = oh->link_msgs_seen;
-
-done:
-    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
-	HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_get_nlinks() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_obj_create
- *
- * Purpose:	Creates an object, in an abstract manner.
- *
- * Return:	Success:	Pointer to object opened
- *		Failure:	NULL
- *
- * Programmer:	Quincey Koziol
- *		April 9 2007
- *
- *-------------------------------------------------------------------------
- */
-void *
-H5O_obj_create(H5F_t *f, H5O_type_t obj_type, void *crt_info, H5G_loc_t *obj_loc,
-    hid_t dxpl_id)
-{
-    size_t u;                           /* Local index variable */
-    void *ret_value = NULL;             /* Return value */
-
-    FUNC_ENTER_NOAPI(NULL)
-
-    /* Sanity checks */
-    HDassert(f);
-    HDassert(obj_type >= H5O_TYPE_GROUP && obj_type <= H5O_TYPE_NAMED_DATATYPE);
-    HDassert(crt_info);
-    HDassert(obj_loc);
-
-    /* Iterate through the object classes */
-    for(u = 0; u < NELMTS(H5O_obj_class_g); u++) {
-        /* Check for correct type of object to create */
-	if(H5O_obj_class_g[u]->type == obj_type) {
-            /* Call the object class's 'create' routine */
-            HDassert(H5O_obj_class_g[u]->create);
-            if(NULL == (ret_value = H5O_obj_class_g[u]->create(f, crt_info, obj_loc, dxpl_id)))
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTOPENOBJ, NULL, "unable to open object")
-
-            /* Break out of loop */
-            break;
-        } /* end if */
-    } /* end for */
-    HDassert(ret_value);
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_obj_create() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_get_oh_addr
- *
- * Purpose:	Retrieve the address of the object header
- *
- * Note:	This routine participates in the "Inlining C struct access"
- *		pattern, don't call it directly, use the appropriate macro
- *		defined in H5Oprivate.h.
- *
- * Return:	Success:	Valid haddr_t
- *		Failure:	HADDR_UNDEF
- *
- * Programmer:	Quincey Koziol
- *		March 15 2007
- *
- *-------------------------------------------------------------------------
- */
-haddr_t
-H5O_get_oh_addr(const H5O_t *oh)
-{
-    /* Use FUNC_ENTER_NOAPI_NOINIT_NOERR here to avoid performance issues */
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
-
-    HDassert(oh);
-    HDassert(oh->chunk);
-
-    FUNC_LEAVE_NOAPI(oh->chunk[0].addr)
-} /* end H5O_get_oh_addr() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_get_rc_and_type
- *
- * Purpose:	Retrieve an object's reference count and type
- *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
- *
- * Programmer:	Quincey Koziol
- *		November  4 2007
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_get_rc_and_type(const H5O_loc_t *loc, hid_t dxpl_id, unsigned *rc, H5O_type_t *otype)
-{
-    H5O_t *oh = NULL;                   /* Object header */
-    herr_t ret_value = SUCCEED;         /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* Check args */
-    HDassert(loc);
-
-    /* Get the object header */
-    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
-	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
-
-    /* Set the object's reference count */
-    if(rc)
-        *rc = oh->nlink;
-
-    /* Retrieve the type of the object */
-    if(otype)
-        if(H5O_obj_type_real(oh, otype) < 0)
-            HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to determine object type")
-
-done:
-    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
-	HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_get_rc_and_type() */
-
-
-/*-------------------------------------------------------------------------
- * Function:    H5O_free_visit_visited
- *
- * Purpose:     Free the key for an object visited during a group traversal
- *
- * Return:      Non-negative on success, negative on failure
- *
- * Programmer:  Quincey Koziol
- *	        Nov 25, 2007
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5O_free_visit_visited(void *item, void H5_ATTR_UNUSED *key, void H5_ATTR_UNUSED *operator_data/*in,out*/)
-{
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
-
-    item = H5FL_FREE(H5_obj_t, item);
-
-    FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_free_visit_visited() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_visit_cb
- *
- * Purpose:     Callback function for recursively visiting objects from a group
- *
- * Return:	Success:        Non-negative
- *		Failure:	Negative
- *
- * Programmer:	Quincey Koziol
- *	        Nov 25, 2007
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5O_visit_cb(hid_t H5_ATTR_UNUSED group, const char *name, const H5L_info_t *linfo,
-    void *_udata)
-{
-    H5O_iter_visit_ud_t *udata = (H5O_iter_visit_ud_t *)_udata;     /* User data for callback */
-    H5G_loc_t   obj_loc;                /* Location of object */
-    H5G_name_t  obj_path;            	/* Object's group hier. path */
-    H5O_loc_t   obj_oloc;            	/* Object's object location */
-    hbool_t     obj_found = FALSE;      /* Object at 'name' found */
-    herr_t ret_value = H5_ITER_CONT;    /* Return value */
-
-    FUNC_ENTER_NOAPI_NOINIT
-
-    /* Sanity check */
-    HDassert(name);
-    HDassert(linfo);
-    HDassert(udata);
-
-    /* Check if this is a hard link */
-    if(linfo->type == H5L_TYPE_HARD) {
-        H5_obj_t obj_pos;       /* Object "position" for this object */
-
-        /* Set up opened group location to fill in */
-        obj_loc.oloc = &obj_oloc;
-        obj_loc.path = &obj_path;
-        H5G_loc_reset(&obj_loc);
-
-        /* Find the object using the LAPL passed in */
-        /* (Correctly handles mounted files) */
-        if(H5G_loc_find(udata->start_loc, name, &obj_loc/*out*/, udata->lapl_id, udata->dxpl_id) < 0)
-            HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, H5_ITER_ERROR, "object not found")
-        obj_found = TRUE;
-
-        /* Construct unique "position" for this object */
-        H5F_GET_FILENO(obj_oloc.file, obj_pos.fileno);
-        obj_pos.addr = obj_oloc.addr;
-
-        /* Check if we've seen the object the link references before */
-        if(NULL == H5SL_search(udata->visited, &obj_pos)) {
-            H5O_info_t oinfo;           /* Object info */
-
-            /* Get the object's info */
-            if(H5O_get_info(&obj_oloc, udata->dxpl_id, TRUE, &oinfo) < 0)
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, H5_ITER_ERROR, "unable to get object info")
-
-            /* Make the application callback */
-            ret_value = (udata->op)(udata->obj_id, name, &oinfo, udata->op_data);
-
-            /* Check for continuing to visit objects */
-            if(ret_value == H5_ITER_CONT) {
-                /* If its ref count is > 1, we add it to the list of visited objects */
-                /* (because it could come up again during traversal) */
-                if(oinfo.rc > 1) {
-                    H5_obj_t *new_node;                  /* New object node for visited list */
-
-                    /* Allocate new object "position" node */
-                    if((new_node = H5FL_MALLOC(H5_obj_t)) == NULL)
-                        HGOTO_ERROR(H5E_OHDR, H5E_NOSPACE, H5_ITER_ERROR, "can't allocate object node")
-
-                    /* Set node information */
-                    *new_node = obj_pos;
-
-                    /* Add to list of visited objects */
-                    if(H5SL_insert(udata->visited, new_node, new_node) < 0)
-                        HGOTO_ERROR(H5E_OHDR, H5E_CANTINSERT, H5_ITER_ERROR, "can't insert object node into visited list")
-                } /* end if */
-            } /* end if */
-        } /* end if */
-    } /* end if */
-
-done:
-    /* Release resources */
-    if(obj_found && H5G_loc_free(&obj_loc) < 0)
-        HDONE_ERROR(H5E_OHDR, H5E_CANTRELEASE, H5_ITER_ERROR, "can't free location")
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_visit_cb() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_visit
- *
- * Purpose:	Recursively visit an object and all the objects reachable
- *              from it.  If the starting object is a group, all the objects
- *              linked to from that group will be visited.  Links within
- *              each group are visited according to the order within the
- *              specified index (unless the specified index does not exist for
- *              a particular group, then the "name" index is used).
- *
- *              NOTE: Soft links and user-defined links are ignored during
- *              this operation.
- *
- *              NOTE: Each _object_ reachable from the initial group will only
- *              be visited once.  If multiple hard links point to the same
- *              object, the first link to the object's path (according to the
- *              iteration index and iteration order given) will be used to in
- *              the callback about the object.
- *
- * Return:	Success:	The return value of the first operator that
- *				returns non-zero, or zero if all members were
- *				processed with no operator returning non-zero.
- *
- *		Failure:	Negative if something goes wrong within the
- *				library, or the negative value returned by one
- *				of the operators.
- *
- * Programmer:	Quincey Koziol
- *		November 24 2007
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5O_visit(hid_t loc_id, const char *obj_name, H5_index_t idx_type,
-    H5_iter_order_t order, H5O_iterate_t op, void *op_data, hid_t lapl_id,
-    hid_t dxpl_id)
-{
-    H5O_iter_visit_ud_t udata;  /* User data for callback */
-    H5G_loc_t	loc;            /* Location of reference object */
-    H5G_loc_t   obj_loc;        /* Location used to open object */
-    H5G_name_t  obj_path;       /* Opened object group hier. path */
-    H5O_loc_t   obj_oloc;       /* Opened object object location */
-    hbool_t     loc_found = FALSE;      /* Entry at 'name' found */
-    H5O_info_t  oinfo;          /* Object info struct */
-    hid_t       obj_id = (-1);  /* ID of object */
-    herr_t      ret_value = FAIL;       /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* Portably initialize user data struct to zeros */
-    HDmemset(&udata, 0, sizeof(udata));
-
-    /* Check args */
-    if(H5G_loc(loc_id, &loc) < 0)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
-
-    /* Set up opened group location to fill in */
-    obj_loc.oloc = &obj_oloc;
-    obj_loc.path = &obj_path;
-    H5G_loc_reset(&obj_loc);
-
-    /* Find the object's location */
-    if(H5G_loc_find(&loc, obj_name, &obj_loc/*out*/, lapl_id, dxpl_id) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, FAIL, "object not found")
-    loc_found = TRUE;
-
-    /* Get the object's info */
-    if(H5O_get_info(&obj_oloc, dxpl_id, TRUE, &oinfo) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "unable to get object info")
-
-    /* Open the object */
-    /* (Takes ownership of the obj_loc information) */
-    if((obj_id = H5O_open_by_loc(&obj_loc, lapl_id, dxpl_id, TRUE)) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTOPENOBJ, FAIL, "unable to open object")
-
-    /* Make callback for starting object */
-    if((ret_value = op(obj_id, ".", &oinfo, op_data)) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_BADITER, FAIL, "can't visit objects")
-
-    /* Check return value of first callback */
-    if(ret_value != H5_ITER_CONT)
-        HGOTO_DONE(ret_value);
-
-    /* Check for object being a group */
-    if(oinfo.type == H5O_TYPE_GROUP) {
-        H5G_loc_t	start_loc;          /* Location of starting group */
-
-        /* Get the location of the starting group */
-        if(H5G_loc(obj_id, &start_loc) < 0)
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
-
-        /* Set up user data for visiting links */
-        udata.obj_id = obj_id;
-        udata.start_loc = &start_loc;
-        udata.lapl_id = lapl_id;
-        udata.dxpl_id = dxpl_id;
-        udata.op = op;
-        udata.op_data = op_data;
-
-        /* Create skip list to store visited object information */
-        if((udata.visited = H5SL_create(H5SL_TYPE_OBJ, NULL)) == NULL)
-            HGOTO_ERROR(H5E_OHDR, H5E_CANTCREATE, FAIL, "can't create skip list for visited objects")
-
-        /* If its ref count is > 1, we add it to the list of visited objects */
-        /* (because it could come up again during traversal) */
-        if(oinfo.rc > 1) {
-            H5_obj_t *obj_pos;                  /* New object node for visited list */
-
-            /* Allocate new object "position" node */
-            if((obj_pos = H5FL_MALLOC(H5_obj_t)) == NULL)
-                HGOTO_ERROR(H5E_OHDR, H5E_NOSPACE, FAIL, "can't allocate object node")
-
-            /* Construct unique "position" for this object */
-            obj_pos->fileno = oinfo.fileno;
-            obj_pos->addr = oinfo.addr;
-
-            /* Add to list of visited objects */
-            if(H5SL_insert(udata.visited, obj_pos, obj_pos) < 0)
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTINSERT, FAIL, "can't insert object node into visited list")
-        } /* end if */
-
-        /* Call internal group visitation routine */
-        if((ret_value = H5G_visit(obj_id, ".", idx_type, order, H5O_visit_cb, &udata, lapl_id, dxpl_id)) < 0)
-            HGOTO_ERROR(H5E_OHDR, H5E_BADITER, FAIL, "object visitation failed")
-    } /* end if */
-
-done:
-    if(obj_id > 0) {
-        if(H5I_dec_app_ref(obj_id) < 0)
-            HDONE_ERROR(H5E_OHDR, H5E_CANTRELEASE, FAIL, "unable to close object")
-    } /* end if */
-    else if(loc_found && H5G_loc_free(&obj_loc) < 0)
-        HDONE_ERROR(H5E_OHDR, H5E_CANTRELEASE, FAIL, "can't free location")
-    if(udata.visited)
-        H5SL_destroy(udata.visited, H5O_free_visit_visited, NULL);
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_visit() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_inc_rc
- *
- * Purpose:	Increments the reference count on an object header
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *		koziol@hdfgroup.org
- *		Jul 13 2008
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_inc_rc(H5O_t *oh)
-{
-    herr_t ret_value = SUCCEED;         /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* check args */
-    HDassert(oh);
-
-    /* Pin the object header when the reference count goes above 0 */
-    if(oh->rc == 0)
-        if(H5AC_pin_protected_entry(oh) < 0)
-            HGOTO_ERROR(H5E_OHDR, H5E_CANTPIN, FAIL, "unable to pin object header")
-
-    /* Increment reference count */
-    oh->rc++;
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_inc_rc() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_dec_rc
- *
- * Purpose:	Decrements the reference count on an object header
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *		koziol@hdfgroup.org
- *		Jul 13 2008
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_dec_rc(H5O_t *oh)
-{
-    herr_t ret_value = SUCCEED;         /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* check args */
-    HDassert(oh);
-
-    /* Decrement reference count */
-    oh->rc--;
-
-    /* Unpin the object header when the reference count goes back to 0 */
-    if(oh->rc == 0)
-        if(H5AC_unpin_entry(oh) < 0)
-            HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPIN, FAIL, "unable to unpin object header")
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_dec_rc() */
-
-
-/*-------------------------------------------------------------------------
- * Function:   H5O_dec_rc_by_loc
- *
- * Purpose:    Decrement the refcount of an object header, using its
- *              object location information.
- *
- * Return:     Non-negative on success/Negative on failure
- *
- * Programmer: Quincey Koziol
- *             koziol@hdfgroup.org
- *             Oct 08 2010
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_dec_rc_by_loc(const H5O_loc_t *loc, hid_t dxpl_id)
-{
-    H5O_t       *oh = NULL;             /* Object header */
-    herr_t      ret_value = SUCCEED;    /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* check args */
-    HDassert(loc);
-
-    /* Get header */
-    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
-       HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to protect object header")
-
-    /* Decrement the reference count on the object header */
-    /* (which will unpin it, if appropriate) */
-    if(H5O_dec_rc(oh) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTDEC, FAIL, "unable to decrement reference count on object header")
-
-done:
-    /* Release the object header from the cache */
-    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
-        HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_dec_rc_by_loc() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_get_proxy
- *
- * Purpose:	Retrieve the proxy for the object header.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *		July 24 2016
- *
- *-------------------------------------------------------------------------
- */
-H5AC_proxy_entry_t *
-H5O_get_proxy(const H5O_t *oh)
-{
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
-
-    /* Check args */
-    HDassert(oh);
-
-    FUNC_LEAVE_NOAPI(oh->proxy)
-} /* end H5O_get_proxy() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O__free
- *
- * Purpose:	Destroys an object header.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *		koziol@ncsa.uiuc.edu
- *		Jan 15 2003
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O__free(H5O_t *oh)
-{
-    unsigned	u;                      /* Local index variable */
-    herr_t      ret_value = SUCCEED;    /* Return value */
-
-    FUNC_ENTER_PACKAGE
-
-    /* check args */
-    HDassert(oh);
-    HDassert(0 == oh->rc);
-
-    /* Destroy chunks */
-    if(oh->chunk) {
-        for(u = 0; u < oh->nchunks; u++)
-            oh->chunk[u].image = H5FL_BLK_FREE(chunk_image, oh->chunk[u].image);
-
-        oh->chunk = (H5O_chunk_t *)H5FL_SEQ_FREE(H5O_chunk_t, oh->chunk);
-    } /* end if */
-
-    /* Destroy messages */
-    if(oh->mesg) {
-        for(u = 0; u < oh->nmesgs; u++) {
-#ifndef NDEBUG
-            /* Verify that message is clean, unless it could have been marked
-             * dirty by decoding */
-            if(oh->ndecode_dirtied && oh->mesg[u].dirty)
-                oh->ndecode_dirtied--;
-            else
-                HDassert(oh->mesg[u].dirty == 0);
-#endif /* NDEBUG */
-
-            H5O_msg_free_mesg(&oh->mesg[u]);
-        } /* end for */
-
-        /* Make sure we accounted for all the messages dirtied by decoding */
-        HDassert(!oh->ndecode_dirtied);
-
-        oh->mesg = (H5O_mesg_t *)H5FL_SEQ_FREE(H5O_mesg_t, oh->mesg);
-    } /* end if */
-
-    /* Destroy the proxy */
-    if(oh->proxy)
-        if(H5AC_proxy_entry_dest(oh->proxy) < 0)
-            HGOTO_ERROR(H5E_OHDR, H5E_CANTFREE, FAIL, "unable to destroy virtual entry used for proxy")
-
-    /* destroy object header */
-    oh = H5FL_FREE(H5O_t, oh);
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O__free() */
-
diff --git a/src/H5Oint.c b/src/H5Oint.c
new file mode 100644
index 0000000..6ab5393
--- /dev/null
+++ b/src/H5Oint.c
@@ -0,0 +1,2713 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * 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 COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*-------------------------------------------------------------------------
+ *
+ * Created:     H5O.c
+ *
+ * Purpose:     Internal object header routines
+ *
+ *-------------------------------------------------------------------------
+ */
+
+/****************/
+/* Module Setup */
+/****************/
+
+#include "H5Omodule.h"          /* This source code file is part of the H5O module */
+
+
+/***********/
+/* Headers */
+/***********/
+#include "H5private.h"          /* Generic Functions                        */
+#include "H5Eprivate.h"         /* Error handling                           */
+#include "H5Fprivate.h"         /* File access                              */
+#include "H5FLprivate.h"        /* Free lists                               */
+#include "H5FOprivate.h"        /* File objects                             */
+#include "H5Iprivate.h"         /* IDs                                      */
+#include "H5Lprivate.h"         /* Links                                    */
+#include "H5MFprivate.h"        /* File memory management                   */
+#ifdef H5O_ENABLE_BOGUS
+#include "H5MMprivate.h"        /* Memory management                        */
+#endif /* H5O_ENABLE_BOGUS */
+#include "H5Opkg.h"             /* Object headers                           */
+#include "H5SMprivate.h"        /* Shared object header messages            */
+
+
+/****************/
+/* Local Macros */
+/****************/
+
+
+/******************/
+/* Local Typedefs */
+/******************/
+
+/* User data for recursive traversal over objects from a group */
+typedef struct {
+    hid_t       obj_id;         /* The ID for the starting group */
+    H5G_loc_t	*start_loc;     /* Location of starting group */
+    hid_t       lapl_id;        /* LAPL for walking across links */
+    hid_t       dxpl_id; 	/* DXPL for operations */
+    H5SL_t     *visited;        /* Skip list for tracking visited nodes */
+    H5O_iterate_t op;           /* Application callback */
+    void       *op_data;        /* Application's op data */
+} H5O_iter_visit_ud_t;
+
+
+/********************/
+/* Package Typedefs */
+/********************/
+
+
+/********************/
+/* Local Prototypes */
+/********************/
+
+static herr_t H5O_delete_oh(H5F_t *f, hid_t dxpl_id, H5O_t *oh);
+static herr_t H5O_obj_type_real(H5O_t *oh, H5O_type_t *obj_type);
+static herr_t H5O_get_hdr_info_real(const H5O_t *oh, H5O_hdr_info_t *hdr);
+static const H5O_obj_class_t *H5O_obj_class_real(H5O_t *oh);
+
+
+/*********************/
+/* Package Variables */
+/*********************/
+
+/* Package initialization variable */
+hbool_t H5_PKG_INIT_VAR = FALSE;
+
+/* Header message ID to class mapping
+ *
+ * Remember to increment H5O_MSG_TYPES in H5Opkg.h when adding a new
+ * message.
+ */
+const H5O_msg_class_t *const H5O_msg_class_g[] = {
+    H5O_MSG_NULL,		/*0x0000 Null				*/
+    H5O_MSG_SDSPACE,		/*0x0001 Dataspace			*/
+    H5O_MSG_LINFO,		/*0x0002 Link information		*/
+    H5O_MSG_DTYPE,		/*0x0003 Datatype			*/
+    H5O_MSG_FILL,       	/*0x0004 Old data storage -- fill value */
+    H5O_MSG_FILL_NEW,		/*0x0005 New data storage -- fill value */
+    H5O_MSG_LINK,		/*0x0006 Link 				*/
+    H5O_MSG_EFL,		/*0x0007 Data storage -- external data files */
+    H5O_MSG_LAYOUT,		/*0x0008 Data Layout			*/
+#ifdef H5O_ENABLE_BOGUS
+    H5O_MSG_BOGUS_VALID,	/*0x0009 "Bogus valid" (for testing)	*/
+#else /* H5O_ENABLE_BOGUS */
+    NULL,			/*0x0009 "Bogus valid" (for testing)	*/
+#endif /* H5O_ENABLE_BOGUS */
+    H5O_MSG_GINFO,		/*0x000A Group information		*/
+    H5O_MSG_PLINE,		/*0x000B Data storage -- filter pipeline */
+    H5O_MSG_ATTR,		/*0x000C Attribute			*/
+    H5O_MSG_NAME,		/*0x000D Object name			*/
+    H5O_MSG_MTIME,		/*0x000E Object modification date and time */
+    H5O_MSG_SHMESG,		/*0x000F File-wide shared message table */
+    H5O_MSG_CONT,		/*0x0010 Object header continuation	*/
+    H5O_MSG_STAB,		/*0x0011 Symbol table			*/
+    H5O_MSG_MTIME_NEW,		/*0x0012 New Object modification date and time */
+    H5O_MSG_BTREEK,		/*0x0013 Non-default v1 B-tree 'K' values */
+    H5O_MSG_DRVINFO,		/*0x0014 Driver info settings		*/
+    H5O_MSG_AINFO,		/*0x0015 Attribute information		*/
+    H5O_MSG_REFCOUNT,		/*0x0016 Object's ref. count		*/
+    H5O_MSG_FSINFO,		/*0x0017 Free-space manager info        */
+    H5O_MSG_MDCI,               /*0x0018 Metadata cache image           */
+    H5O_MSG_UNKNOWN,		/*0x0019 Placeholder for unknown message */
+#ifdef H5O_ENABLE_BOGUS
+    H5O_MSG_BOGUS_INVALID, 	/*0x001A "Bogus invalid" (for testing) 	*/
+#else /* H5O_ENABLE_BOGUS */
+    NULL,                       /*0x001A "Bogus invalid" (for testing) 	*/
+#endif /* H5O_ENABLE_BOGUS */
+};
+
+/* Declare a free list to manage the H5O_t struct */
+H5FL_DEFINE(H5O_t);
+
+/* Declare a free list to manage the H5O_mesg_t sequence information */
+H5FL_SEQ_DEFINE(H5O_mesg_t);
+
+/* Declare a free list to manage the H5O_chunk_t sequence information */
+H5FL_SEQ_DEFINE(H5O_chunk_t);
+
+/* Declare a free list to manage the chunk image information */
+H5FL_BLK_DEFINE(chunk_image);
+
+/* Declare external the free list for H5O_cont_t sequences */
+H5FL_SEQ_EXTERN(H5O_cont_t);
+
+
+/*****************************/
+/* Library Private Variables */
+/*****************************/
+
+/* Declare external the free list for time_t's */
+H5FL_EXTERN(time_t);
+
+/* Declare external the free list for H5_obj_t's */
+H5FL_EXTERN(H5_obj_t);
+
+
+/*******************/
+/* Local Variables */
+/*******************/
+
+/* Header object ID to class mapping */
+/*
+ * Initialize the object class info table.  Begin with the most general types
+ * and end with the most specific. For instance, any object that has a
+ * datatype message is a datatype but only some of them are datasets.
+ */
+static const H5O_obj_class_t *const H5O_obj_class_g[] = {
+    H5O_OBJ_DATATYPE,		/* Datatype object (H5O_TYPE_NAMED_DATATYPE - 2) */
+    H5O_OBJ_DATASET,		/* Dataset object (H5O_TYPE_DATASET - 1) */
+    H5O_OBJ_GROUP,		/* Group object (H5O_TYPE_GROUP - 0) */
+};
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O__init_package
+ *
+ * Purpose:	Initialize information specific to H5O interface.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *              Thursday, January 18, 2007
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O__init_package(void)
+{
+    FUNC_ENTER_PACKAGE_NOERR
+
+    /* H5O interface sanity checks */
+    HDcompile_assert(H5O_MSG_TYPES == NELMTS(H5O_msg_class_g));
+    HDcompile_assert(sizeof(H5O_fheap_id_t) == H5O_FHEAP_ID_LEN);
+
+    HDcompile_assert(H5O_UNKNOWN_ID < H5O_MSG_TYPES);
+
+    FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5O__init_package() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_create
+ *
+ * Purpose:	Creates a new object header. Allocates space for it and
+ *              then calls an initialization function. The object header
+ *              is opened for write access and should eventually be
+ *              closed by calling H5O_close().
+ *
+ * Return:	Success:	Non-negative, the ENT argument contains
+ *				information about the object header,
+ *				including its address.
+ *
+ *		Failure:	Negative
+ *
+ * Programmer:	Robb Matzke
+ *		matzke@llnl.gov
+ *		Aug  5 1997
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_create(H5F_t *f, hid_t dxpl_id, size_t size_hint, size_t initial_rc,
+    hid_t ocpl_id, H5O_loc_t *loc/*out*/)
+{
+    H5P_genplist_t  *oc_plist;          /* Object creation property list */
+    H5O_t      *oh = NULL;              /* Object header created */
+    haddr_t     oh_addr;                /* Address of initial object header */
+    size_t      oh_size;                /* Size of initial object header */
+    uint8_t	oh_flags;		/* Object header's initial status flags */
+    unsigned    insert_flags = H5AC__NO_FLAGS_SET; /* Flags for inserting object header into cache */
+    hbool_t     store_msg_crt_idx;      /* Whether to always store message creation indices for this file */
+    herr_t      ret_value = SUCCEED;    /* return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* check args */
+    HDassert(f);
+    HDassert(loc);
+    HDassert(TRUE == H5P_isa_class(ocpl_id, H5P_OBJECT_CREATE));
+
+    /* Check for invalid access request */
+    if(0 == (H5F_INTENT(f) & H5F_ACC_RDWR))
+        HGOTO_ERROR(H5E_OHDR, H5E_BADVALUE, FAIL, "no write intent on file")
+
+    /* Make certain we allocate at least a reasonable size for the object header */
+    size_hint = H5O_ALIGN_F(f, MAX(H5O_MIN_SIZE, size_hint));
+
+    /* Get the property list */
+    if(NULL == (oc_plist = (H5P_genplist_t *)H5I_object(ocpl_id)))
+        HGOTO_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not a property list")
+
+    /* Get any object header status flags set by properties */
+    if(H5P_get(oc_plist, H5O_CRT_OHDR_FLAGS_NAME, &oh_flags) < 0)
+        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get object header flags")
+
+    /* Allocate the object header and zero out header fields */
+    if(NULL == (oh = H5FL_CALLOC(H5O_t)))
+        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
+
+    /* Initialize file-specific information for object header */
+    store_msg_crt_idx = H5F_STORE_MSG_CRT_IDX(f);
+    if(H5F_USE_LATEST_FLAGS(f, H5F_LATEST_OBJ_HEADER) || store_msg_crt_idx || (oh_flags & H5O_HDR_ATTR_CRT_ORDER_TRACKED))
+        oh->version = H5O_VERSION_LATEST;
+    else
+        oh->version = H5O_VERSION_1;
+    oh->sizeof_size = H5F_SIZEOF_SIZE(f);
+    oh->sizeof_addr = H5F_SIZEOF_ADDR(f);
+    oh->swmr_write = !!(H5F_INTENT(f) & H5F_ACC_SWMR_WRITE);
+#ifdef H5O_ENABLE_BAD_MESG_COUNT
+    /* Check whether the "bad message count" property is set */
+    if(H5P_exist_plist(oc_plist, H5O_BAD_MESG_COUNT_NAME) > 0) {
+        /* Retrieve bad message count flag */
+        if(H5P_get(oc_plist, H5O_BAD_MESG_COUNT_NAME, &oh->store_bad_mesg_count) < 0)
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't get bad message count flag")
+    }
+#endif /* H5O_ENABLE_BAD_MESG_COUNT */
+
+    /* Create object header proxy if doing SWMR writes */
+    if(oh->swmr_write) {
+        /* Create virtual entry, for use as proxy */
+        if(NULL == (oh->proxy = H5AC_proxy_entry_create()))
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTCREATE, FAIL, "can't create object header proxy")
+    }
+    else
+        oh->proxy = NULL;
+
+    /* Set initial status flags */
+    oh->flags = oh_flags;
+
+    /* Initialize version-specific fields */
+    if(oh->version > H5O_VERSION_1) {
+        /* Initialize all time fields with current time, if we are storing them */
+        if(oh->flags & H5O_HDR_STORE_TIMES)
+            oh->atime = oh->mtime = oh->ctime = oh->btime = H5_now();
+        else
+            oh->atime = oh->mtime = oh->ctime = oh->btime = 0;
+
+        /* Make certain attribute creation order tracking is enabled if
+         *      attributes can be shared in this file.
+         */
+        if(store_msg_crt_idx)
+            oh->flags |= H5O_HDR_ATTR_CRT_ORDER_TRACKED;
+
+        /* Retrieve attribute storage phase change values from property list */
+        if(H5P_get(oc_plist, H5O_CRT_ATTR_MAX_COMPACT_NAME, &oh->max_compact) < 0)
+            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get max. # of compact attributes")
+        if(H5P_get(oc_plist, H5O_CRT_ATTR_MIN_DENSE_NAME, &oh->min_dense) < 0)
+            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get min. # of dense attributes")
+
+        /* Check for non-default attribute storage phase change values */
+        if(oh->max_compact != H5O_CRT_ATTR_MAX_COMPACT_DEF || oh->min_dense != H5O_CRT_ATTR_MIN_DENSE_DEF)
+            oh->flags |= H5O_HDR_ATTR_STORE_PHASE_CHANGE;
+
+        /* Determine correct value for chunk #0 size bits */
+/* Avoid compiler warning on 32-bit machines */
+#if H5_SIZEOF_SIZE_T > H5_SIZEOF_INT32_T
+        if(size_hint > 4294967295UL)
+            oh->flags |= H5O_HDR_CHUNK0_8;
+        else
+#endif /* H5_SIZEOF_SIZE_T > H5_SIZEOF_INT32_T */
+        if(size_hint > 65535)
+            oh->flags |= H5O_HDR_CHUNK0_4;
+        else if(size_hint > 255)
+            oh->flags |= H5O_HDR_CHUNK0_2;
+    } /* end if */
+    else {
+        /* Reset unused time fields */
+        oh->atime = oh->mtime = oh->ctime = oh->btime = 0;
+    } /* end else */
+
+    /* Compute total size of initial object header */
+    /* (i.e. object header prefix and first chunk) */
+    oh_size = (size_t)H5O_SIZEOF_HDR(oh) + size_hint;
+
+    /* Allocate disk space for header and first chunk */
+    if(HADDR_UNDEF == (oh_addr = H5MF_alloc(f, H5FD_MEM_OHDR, dxpl_id, (hsize_t)oh_size)))
+        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "file allocation failed for object header")
+
+    /* Create the chunk list */
+    oh->nchunks = oh->alloc_nchunks = 1;
+    if(NULL == (oh->chunk = H5FL_SEQ_MALLOC(H5O_chunk_t, (size_t)oh->alloc_nchunks)))
+        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
+
+    /* Initialize the first chunk */
+    oh->chunk[0].addr = oh_addr;
+    oh->chunk[0].size = oh_size;
+    oh->chunk[0].gap = 0;
+
+    /* Allocate enough space for the first chunk */
+    /* (including space for serializing the object header prefix */
+    if(NULL == (oh->chunk[0].image = H5FL_BLK_CALLOC(chunk_image, oh_size)))
+        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
+    oh->chunk[0].chunk_proxy = NULL;
+
+    /* Put magic # for object header in first chunk */
+    if(oh->version > H5O_VERSION_1)
+        HDmemcpy(oh->chunk[0].image, H5O_HDR_MAGIC, (size_t)H5_SIZEOF_MAGIC);
+
+    /* Create the message list */
+    oh->nmesgs = 1;
+    oh->alloc_nmesgs = H5O_NMESGS;
+    if(NULL == (oh->mesg = H5FL_SEQ_CALLOC(H5O_mesg_t, oh->alloc_nmesgs)))
+        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
+
+    /* Initialize the initial "null" message, covering the entire first chunk */
+    oh->mesg[0].type = H5O_MSG_NULL;
+    oh->mesg[0].dirty = TRUE;
+    oh->mesg[0].native = NULL;
+    oh->mesg[0].raw = oh->chunk[0].image + (H5O_SIZEOF_HDR(oh) - H5O_SIZEOF_CHKSUM_OH(oh)) + H5O_SIZEOF_MSGHDR_OH(oh);
+    oh->mesg[0].raw_size = size_hint - (size_t)H5O_SIZEOF_MSGHDR_OH(oh);
+    oh->mesg[0].chunkno = 0;
+
+    /* Check for non-zero initial refcount on the object header */
+    if(initial_rc > 0) {
+        /* Set the initial refcount & pin the header when its inserted */
+        oh->rc = initial_rc;
+        insert_flags |= H5AC__PIN_ENTRY_FLAG;
+    }
+
+    /* Set metadata tag in dxpl_id */
+    H5_BEGIN_TAG(dxpl_id, oh_addr, FAIL);
+
+    /* Cache object header */
+    if(H5AC_insert_entry(f, dxpl_id, H5AC_OHDR, oh_addr, oh, insert_flags) < 0)
+        HGOTO_ERROR_TAG(H5E_OHDR, H5E_CANTINSERT, FAIL, "unable to cache object header")
+
+    /* Reset object header pointer, now that it's been inserted into the cache */
+    oh = NULL;
+
+    /* Reset metadata tag in dxpl_id */
+    H5_END_TAG(FAIL);
+
+    /* Set up object location */
+    loc->file = f;
+    loc->addr = oh_addr;
+
+    /* Open it */
+    if(H5O_open(loc) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTOPENOBJ, FAIL, "unable to open object header")
+
+done:
+    if(ret_value < 0 && oh)
+        if(H5O__free(oh) < 0)
+            HDONE_ERROR(H5E_OHDR, H5E_CANTFREE, FAIL, "unable to destroy object header data")
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_create() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_open
+ *
+ * Purpose:	Opens an object header which is described by the symbol table
+ *		entry OBJ_ENT.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Robb Matzke
+ *		Monday, January	 5, 1998
+ *
+ * Modification:
+ *              Raymond Lu
+ *              5 November 2007
+ *              Turn off the holding file variable if it's on.  When it's
+ *              needed, the caller will turn it on again.
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_open(H5O_loc_t *loc)
+{
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Check args */
+    HDassert(loc);
+    HDassert(loc->file);
+
+#ifdef H5O_DEBUG
+    if(H5DEBUG(O))
+        HDfprintf(H5DEBUG(O), "> %a\n", loc->addr);
+#endif
+
+    /* Turn off the variable for holding file or increment open-lock counters */
+    if(loc->holding_file)
+     	loc->holding_file = FALSE;
+    else
+        H5F_INCR_NOPEN_OBJS(loc->file);
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_open() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_open_name
+ *
+ * Purpose:	Opens an object within an HDF5 file.
+ *
+ * Return:	Success:	An open object identifier
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		March  5 2007
+ *
+ *-------------------------------------------------------------------------
+ */
+hid_t
+H5O_open_name(H5G_loc_t *loc, const char *name, hid_t lapl_id, hid_t dxpl_id, hbool_t app_ref)
+{
+    H5G_loc_t   obj_loc;                /* Location used to open group */
+    H5G_name_t  obj_path;            	/* Opened object group hier. path */
+    H5O_loc_t   obj_oloc;            	/* Opened object object location */
+    hbool_t     loc_found = FALSE;      /* Entry at 'name' found */
+    hid_t       ret_value = FAIL;
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Check args */
+    HDassert(loc);
+    HDassert(name && *name);
+
+    /* Set up opened group location to fill in */
+    obj_loc.oloc = &obj_oloc;
+    obj_loc.path = &obj_path;
+    H5G_loc_reset(&obj_loc);
+
+    /* Find the object's location */
+    if(H5G_loc_find(loc, name, &obj_loc/*out*/, lapl_id, dxpl_id) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, FAIL, "object not found")
+    loc_found = TRUE;
+
+    /* Open the object */
+    if((ret_value = H5O_open_by_loc(&obj_loc, lapl_id, dxpl_id, app_ref)) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTOPENOBJ, FAIL, "unable to open object")
+
+done:
+    if(ret_value < 0 && loc_found)
+        if(H5G_loc_free(&obj_loc) < 0)
+            HDONE_ERROR(H5E_OHDR, H5E_CANTRELEASE, FAIL, "can't free location")
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_open_name() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_open_by_loc
+ *
+ * Purpose:	Opens an object and returns an ID given its group loction.
+ *
+ * Return:	Success:	Open object identifier
+ *		Failure:	Negative
+ *
+ * Programmer:	James Laird
+ *		July 25 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+hid_t
+H5O_open_by_loc(const H5G_loc_t *obj_loc, hid_t lapl_id, hid_t dxpl_id, hbool_t app_ref)
+{
+    const H5O_obj_class_t *obj_class;   /* Class of object for location */
+    hid_t               ret_value = H5I_INVALID_HID;    /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    HDassert(obj_loc);
+
+    /* Get the object class for this location */
+    if(NULL == (obj_class = H5O_obj_class(obj_loc->oloc, dxpl_id)))
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "unable to determine object class")
+
+    /* Call the object class's 'open' routine */
+    HDassert(obj_class->open);
+    if((ret_value = obj_class->open(obj_loc, lapl_id, dxpl_id, app_ref)) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTOPENOBJ, FAIL, "unable to open object")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_open_by_loc() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_close
+ *
+ * Purpose:	Closes an object header that was previously open.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Robb Matzke
+ *		Monday, January	 5, 1998
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_close(H5O_loc_t *loc, hbool_t *file_closed /*out*/)
+{
+    herr_t ret_value = SUCCEED;   /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Check args */
+    HDassert(loc);
+    HDassert(loc->file);
+    HDassert(H5F_NOPEN_OBJS(loc->file) > 0);
+
+    /* Set the file_closed flag to the default value.
+     * This flag lets downstream code know if the file struct is
+     * still accessible and/or likely to contain useful data.
+     * It's needed by the evict-on-close code. Clients can ignore
+     * this value by passing in NULL.
+     */
+    if(file_closed)
+        *file_closed = FALSE;
+
+    /* Decrement open-lock counters */
+    H5F_DECR_NOPEN_OBJS(loc->file);
+
+#ifdef H5O_DEBUG
+    if(H5DEBUG(O)) {
+        if(H5F_FILE_ID(loc->file)< 0 && 1 == H5F_NREFS(loc->file))
+            HDfprintf(H5DEBUG(O), "< %a auto %lu remaining\n",
+                loc->addr, (unsigned long)H5F_NOPEN_OBJS(loc->file));
+	else
+	    HDfprintf(H5DEBUG(O), "< %a\n", loc->addr);
+    }
+#endif
+
+    /*
+     * If the file open object count has reached the number of open mount points
+     * (each of which has a group open in the file) attempt to close the file.
+     */
+    if(H5F_NOPEN_OBJS(loc->file) == H5F_NMOUNTS(loc->file))
+        /* Attempt to close down the file hierarchy */
+        if(H5F_try_close(loc->file, file_closed) < 0)
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTCLOSEFILE, FAIL, "problem attempting file close")
+
+    /* Release location information */
+    if(H5O_loc_free(loc) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTRELEASE, FAIL, "problem attempting to free location")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_close() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_link_oh
+ *
+ * Purpose:	Adjust the link count for an open object header by adding
+ *		ADJUST to the link count.
+ *
+ * Return:	Success:	New link count
+ *
+ *		Failure:	Negative
+ *
+ * Programmer:	Robb Matzke
+ *		matzke@llnl.gov
+ *		Aug  5 1997
+ *
+ *-------------------------------------------------------------------------
+ */
+int
+H5O_link_oh(H5F_t *f, int adjust, hid_t dxpl_id, H5O_t *oh, hbool_t *deleted)
+{
+    haddr_t addr = H5O_OH_GET_ADDR(oh);     /* Object header address */
+    int	ret_value = -1;                     /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* check args */
+    HDassert(f);
+    HDassert(oh);
+    HDassert(deleted);
+
+    /* Check for adjusting link count */
+    if(adjust) {
+        if(adjust < 0) {
+            /* Check for too large of an adjustment */
+            if((unsigned)(-adjust) > oh->nlink)
+                HGOTO_ERROR(H5E_OHDR, H5E_LINKCOUNT, FAIL, "link count would be negative")
+
+            /* Adjust the link count for the object header */
+            oh->nlink = (unsigned)((int)oh->nlink + adjust);
+
+            /* Mark object header as dirty in cache */
+            if(H5AC_mark_entry_dirty(oh) < 0)
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTMARKDIRTY, FAIL, "unable to mark object header as dirty")
+
+            /* Check if the object should be deleted */
+            if(oh->nlink == 0) {
+                /* Check if the object is still open by the user */
+                if(H5FO_opened(f, addr) != NULL) {
+                    /* Flag the object to be deleted when it's closed */
+                    if(H5FO_mark(f, addr, TRUE) < 0)
+                        HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "can't mark object for deletion")
+                } /* end if */
+                else {
+                    /* Mark the object header for deletion */
+                    *deleted = TRUE;
+                } /* end else */
+            } /* end if */
+        } /* end if */
+        else {
+            /* A new object, or one that will be deleted */
+            if(0 == oh->nlink) {
+                /* Check if the object is currently open, but marked for deletion */
+                if(H5FO_marked(f, addr)) {
+                    /* Remove "delete me" flag on the object */
+                    if(H5FO_mark(f, addr, FALSE) < 0)
+                        HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "can't mark object for deletion")
+                } /* end if */
+            } /* end if */
+
+            /* Adjust the link count for the object header */
+            oh->nlink = (unsigned)((int)oh->nlink + adjust);
+
+            /* Mark object header as dirty in cache */
+            if(H5AC_mark_entry_dirty(oh) < 0)
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTMARKDIRTY, FAIL, "unable to mark object header as dirty")
+        } /* end if */
+
+        /* Check for operations on refcount message */
+        if(oh->version > H5O_VERSION_1) {
+            /* Check if the object has a refcount message already */
+            if(oh->has_refcount_msg) {
+                /* Check for removing refcount message */
+                if(oh->nlink <= 1) {
+                    if(H5O_msg_remove_real(f, oh, H5O_MSG_REFCOUNT, H5O_ALL, NULL, NULL, TRUE, dxpl_id) < 0)
+                        HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "unable to delete refcount message")
+                    oh->has_refcount_msg = FALSE;
+                } /* end if */
+                /* Update refcount message with new link count */
+                else {
+                    H5O_refcount_t refcount = oh->nlink;
+
+                    if(H5O_msg_write_real(f, dxpl_id, oh, H5O_MSG_REFCOUNT, H5O_MSG_FLAG_DONTSHARE, 0, &refcount) < 0)
+                        HGOTO_ERROR(H5E_OHDR, H5E_CANTUPDATE, FAIL, "unable to update refcount message")
+                } /* end else */
+            } /* end if */
+            else {
+                /* Check for adding refcount message to object */
+                if(oh->nlink > 1) {
+                    H5O_refcount_t refcount = oh->nlink;
+
+                    if(H5O_msg_append_real(f, dxpl_id, oh, H5O_MSG_REFCOUNT, H5O_MSG_FLAG_DONTSHARE, 0, &refcount) < 0)
+                        HGOTO_ERROR(H5E_OHDR, H5E_CANTINSERT, FAIL, "unable to create new refcount message")
+                    oh->has_refcount_msg = TRUE;
+                } /* end if */
+            } /* end else */
+        } /* end if */
+    } /* end if */
+
+    /* Set return value */
+    ret_value = (int)oh->nlink;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_link_oh() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_link
+ *
+ * Purpose:	Adjust the link count for an object header by adding
+ *		ADJUST to the link count.
+ *
+ * Return:	Success:	New link count
+ *
+ *		Failure:	Negative
+ *
+ * Programmer:	Robb Matzke
+ *		matzke@llnl.gov
+ *		Aug  5 1997
+ *
+ *-------------------------------------------------------------------------
+ */
+int
+H5O_link(const H5O_loc_t *loc, int adjust, hid_t dxpl_id)
+{
+    H5O_t	*oh = NULL;
+    hbool_t deleted = FALSE;            /* Whether the object was deleted */
+    int	ret_value = -1;                 /* Return value */
+
+    FUNC_ENTER_NOAPI_TAG(dxpl_id, loc->addr, FAIL)
+
+    /* check args */
+    HDassert(loc);
+    HDassert(loc->file);
+    HDassert(H5F_addr_defined(loc->addr));
+
+    /* Pin the object header */
+    if(NULL == (oh = H5O_pin(loc, dxpl_id)))
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTPIN, FAIL, "unable to pin object header")
+
+    /* Call the "real" link routine */
+    if((ret_value = H5O_link_oh(loc->file, adjust, dxpl_id, oh, &deleted)) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_LINKCOUNT, FAIL, "unable to adjust object link count")
+
+done:
+    if(oh && H5O_unpin(oh) < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_CANTUNPIN, FAIL, "unable to unpin object header")
+    if(ret_value >= 0 && deleted && H5O_delete(loc->file, dxpl_id, loc->addr) < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "can't delete object from file")
+
+    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+} /* end H5O_link() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_protect
+ *
+ * Purpose:	Wrapper around H5AC_protect for use during a H5O_protect->
+ *              H5O_msg_append->...->H5O_msg_append->H5O_unprotect sequence of calls
+ *              during an object's creation.
+ *
+ * Return:	Success:	Pointer to the object header structure for the
+ *                              object.
+ *		Failure:	NULL
+ *
+ * Programmer:	Quincey Koziol
+ *		koziol@ncsa.uiuc.edu
+ *		Dec 31 2002
+ *
+ *-------------------------------------------------------------------------
+ */
+H5O_t *
+H5O_protect(const H5O_loc_t *loc, hid_t dxpl_id, unsigned prot_flags,
+    hbool_t pin_all_chunks)
+{
+    H5O_t *oh = NULL;           /* Object header protected */
+    H5O_cache_ud_t udata;       /* User data for protecting object header */
+    H5O_cont_msgs_t cont_msg_info;      /* Continuation message info */
+    unsigned file_intent;       /* R/W intent on file */
+    H5O_t *ret_value = NULL;    /* Return value */
+
+    FUNC_ENTER_NOAPI_TAG(dxpl_id, loc->addr, NULL)
+
+    /* check args */
+    HDassert(loc);
+    HDassert(loc->file);
+
+    /* prot_flags may only contain the H5AC__READ_ONLY_FLAG */
+    HDassert((prot_flags & (unsigned)(~H5AC__READ_ONLY_FLAG)) == 0);
+
+    /* Check for valid address */
+    if(!H5F_addr_defined(loc->addr))
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, NULL, "address undefined")
+
+    /* Check for write access on the file */
+    file_intent = H5F_INTENT(loc->file);
+    if((0 == (prot_flags & H5AC__READ_ONLY_FLAG)) && (0 == (file_intent & H5F_ACC_RDWR)))
+        HGOTO_ERROR(H5E_OHDR, H5E_BADVALUE, NULL, "no write intent on file")
+
+    /* Construct the user data for protect callback */
+    udata.made_attempt = FALSE;
+    udata.v1_pfx_nmesgs = 0;
+    udata.chunk0_size = 0;
+    udata.oh = NULL;
+    udata.common.f = loc->file;
+    udata.common.dxpl_id = dxpl_id;
+    udata.common.file_intent = file_intent;
+    udata.common.merged_null_msgs = 0;
+    HDmemset(&cont_msg_info, 0, sizeof(cont_msg_info));
+    udata.common.cont_msg_info = &cont_msg_info;
+    udata.common.addr = loc->addr;
+
+    /* Lock the object header into the cache */
+    if(NULL == (oh = (H5O_t *)H5AC_protect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, &udata, prot_flags)))
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, NULL, "unable to load object header")
+
+    /* Check if there are any continuation messages to process */
+    if(cont_msg_info.nmsgs > 0) {
+        size_t curr_msg;        /* Current continuation message to process */
+        H5O_chk_cache_ud_t chk_udata;   /* User data for loading chunk */
+
+        /* Sanity check - we should only have continuation messages to process
+         *      when the object header is actually loaded from the file.
+         */
+        HDassert(udata.made_attempt == TRUE);
+        HDassert(cont_msg_info.msgs);
+
+        /* Construct the user data for protecting chunks */
+        chk_udata.decoding = TRUE;
+        chk_udata.oh = oh;
+        chk_udata.chunkno = UINT_MAX;   /* Set to invalid value, for better error detection */
+        chk_udata.common.f = loc->file;
+        chk_udata.common.dxpl_id = dxpl_id;
+        chk_udata.common.file_intent = file_intent;
+        chk_udata.common.merged_null_msgs = udata.common.merged_null_msgs;
+        chk_udata.common.cont_msg_info = &cont_msg_info;
+
+        /* Read in continuation messages, until there are no more */
+        /* (Note that loading chunks could increase the # of continuation
+         *      messages if new ones are found - QAK, 19/11/2016)
+         */
+        curr_msg = 0;
+        while(curr_msg < cont_msg_info.nmsgs) {
+            H5O_chunk_proxy_t *chk_proxy;       /* Proxy for chunk, to bring it into memory */
+#ifndef NDEBUG
+            size_t chkcnt = oh->nchunks;      /* Count of chunks (for sanity checking) */
+#endif /* NDEBUG */
+
+            /* Bring the chunk into the cache */
+            /* (which adds to the object header) */
+            chk_udata.common.addr = cont_msg_info.msgs[curr_msg].addr;
+            chk_udata.size = cont_msg_info.msgs[curr_msg].size;
+            if(NULL == (chk_proxy = (H5O_chunk_proxy_t *)H5AC_protect(loc->file, dxpl_id, H5AC_OHDR_CHK, cont_msg_info.msgs[curr_msg].addr, &chk_udata, prot_flags)))
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, NULL, "unable to load object header chunk")
+
+            /* Sanity check */
+            HDassert(chk_proxy->oh == oh);
+            HDassert(chk_proxy->chunkno == chkcnt);
+            HDassert(oh->nchunks == (chkcnt + 1));
+
+            /* Release the chunk from the cache */
+            if(H5AC_unprotect(loc->file, dxpl_id, H5AC_OHDR_CHK, cont_msg_info.msgs[curr_msg].addr, chk_proxy, H5AC__NO_FLAGS_SET) < 0)
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, NULL, "unable to release object header chunk")
+
+            /* Advance to next continuation message */
+            curr_msg++;
+        } /* end while */
+
+        /* Release any continuation messages built up */
+        cont_msg_info.msgs = (H5O_cont_t *)H5FL_SEQ_FREE(H5O_cont_t, cont_msg_info.msgs);
+
+        /* Pass back out some of the chunk's user data */
+        udata.common.merged_null_msgs = chk_udata.common.merged_null_msgs;
+    } /* end if */
+
+    /* Check for incorrect # of object header messages, if we've just loaded
+     *  this object header from the file
+     */
+    if(udata.made_attempt) {
+/* Don't enforce the error on an incorrect # of object header messages bug
+ *      unless strict format checking is enabled.  This allows for older
+ *      files, created with a version of the library that had a bug in tracking
+ *      the correct # of header messages to be read in without the library
+ *      erroring out here. -QAK
+ */
+#ifdef H5_STRICT_FORMAT_CHECKS
+        /* Check for incorrect # of messages in v1 object header */
+        if(oh->version == H5O_VERSION_1 &&
+                (oh->nmesgs + udata.common.merged_null_msgs) != udata.v1_pfx_nmesgs)
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, NULL, "corrupt object header - incorrect # of messages")
+#endif /* H5_STRICT_FORMAT_CHECKS */
+    } /* end if */
+
+#ifdef H5O_DEBUG
+H5O_assert(oh);
+#endif /* H5O_DEBUG */
+
+    /* Pin the other chunks also when requested, so that the object header
+     *  proxy can be set up.
+     */
+    if(pin_all_chunks && oh->nchunks > 1) {
+        unsigned u;         /* Local index variable */
+
+        /* Sanity check */
+        HDassert(oh->swmr_write);
+
+        /* Iterate over chunks > 0 */
+        for(u = 1; u < oh->nchunks; u++) {
+            H5O_chunk_proxy_t *chk_proxy;       /* Chunk proxy */
+
+            /* Protect chunk */
+            if(NULL == (chk_proxy = H5O_chunk_protect(loc->file, dxpl_id, oh, u)))
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, NULL, "unable to protect object header chunk")
+
+            /* Pin chunk proxy*/
+            if(H5AC_pin_protected_entry(chk_proxy) < 0 )
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTPIN, NULL, "unable to pin object header chunk")
+
+            /* Unprotect chunk */
+            if(H5O_chunk_unprotect(loc->file, dxpl_id, chk_proxy, FALSE) < 0)
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, NULL, "unable to unprotect object header chunk")
+
+            /* Preserve chunk proxy pointer for later */
+            oh->chunk[u].chunk_proxy = chk_proxy;
+        } /* end for */
+
+        /* Set the flag for the unprotect */
+        oh->chunks_pinned = TRUE;
+    } /* end if */
+
+    /* Set return value */
+    ret_value = oh;
+
+done:
+    if(ret_value == NULL && oh)
+        if(H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+            HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, NULL, "unable to release object header")
+
+    FUNC_LEAVE_NOAPI_TAG(ret_value, NULL)
+} /* end H5O_protect() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_pin
+ *
+ * Purpose:	Pin an object header down for use during a sequence of message
+ *              operations, which prevents the object header from being
+ *              evicted from the cache.
+ *
+ * Return:	Success:	Pointer to the object header structure for the
+ *                              object.
+ *		Failure:	NULL
+ *
+ * Programmer:	Quincey Koziol
+ *		koziol@hdfgroup.org
+ *		Jul 13 2008
+ *
+ *-------------------------------------------------------------------------
+ */
+H5O_t *
+H5O_pin(const H5O_loc_t *loc, hid_t dxpl_id)
+{
+    H5O_t       *oh = NULL;             /* Object header */
+    H5O_t       *ret_value = NULL;      /* Return value */
+
+    FUNC_ENTER_NOAPI(NULL)
+
+    /* check args */
+    HDassert(loc);
+
+    /* Get header */
+    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__NO_FLAGS_SET, FALSE)))
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, NULL, "unable to protect object header")
+
+    /* Increment the reference count on the object header */
+    /* (which will pin it, if appropriate) */
+    if(H5O_inc_rc(oh) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTINC, NULL, "unable to increment reference count on object header")
+
+    /* Set the return value */
+    ret_value = oh;
+
+done:
+    /* Release the object header from the cache */
+    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, NULL, "unable to release object header")
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_pin() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_unpin
+ *
+ * Purpose:	Unpin an object header, allowing it to be evicted from the
+ *              metadata cache.
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		koziol@hdfgroup.org
+ *		Jul 13 2008
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_unpin(H5O_t *oh)
+{
+    herr_t ret_value = SUCCEED;      /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* check args */
+    HDassert(oh);
+
+    /* Decrement the reference count on the object header */
+    /* (which will unpin it, if appropriate) */
+    if(H5O_dec_rc(oh) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTDEC, FAIL, "unable to decrement reference count on object header")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_unpin() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_unprotect
+ *
+ * Purpose:	Wrapper around H5AC_unprotect for use during a H5O_protect->
+ *              H5O_msg_append->...->H5O_msg_append->H5O_unprotect sequence of calls
+ *              during an object's creation.
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		koziol@ncsa.uiuc.edu
+ *		Dec 31 2002
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_unprotect(const H5O_loc_t *loc, hid_t dxpl_id, H5O_t *oh, unsigned oh_flags)
+{
+    herr_t ret_value = SUCCEED;      /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* check args */
+    HDassert(loc);
+    HDassert(oh);
+
+    /* Unpin the other chunks */
+    if(oh->chunks_pinned && oh->nchunks > 1) {
+        unsigned u;         /* Local index variable */
+
+        /* Sanity check */
+        HDassert(oh->swmr_write);
+
+        /* Iterate over chunks > 0 */
+        for(u = 1; u < oh->nchunks; u++) {
+            if(NULL != oh->chunk[u].chunk_proxy) {
+                /* Release chunk proxy */
+                if(H5AC_unpin_entry(oh->chunk[u].chunk_proxy) < 0)
+                    HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPIN, FAIL, "unable to unpin object header chunk")
+                oh->chunk[u].chunk_proxy = NULL;
+            } /* end if */
+        } /* end for */
+
+        /* Reet the flag from the unprotect */
+        oh->chunks_pinned = FALSE;
+    } /* end if */
+
+    /* Unprotect the object header */
+    if(H5AC_unprotect(loc->file, dxpl_id, H5AC_OHDR, oh->chunk[0].addr, oh, oh_flags) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_unprotect() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_touch_oh
+ *
+ * Purpose:	If FORCE is non-zero then create a modification time message
+ *		unless one already exists.  Then update any existing
+ *		modification time message with the current time.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Robb Matzke
+ *              Monday, July 27, 1998
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_touch_oh(H5F_t *f, hid_t dxpl_id, H5O_t *oh, hbool_t force)
+{
+    H5O_chunk_proxy_t *chk_proxy = NULL;        /* Chunk that message is in */
+    hbool_t chk_dirtied = FALSE;        /* Flag for unprotecting chunk */
+    time_t	now;                    /* Current time */
+    herr_t      ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    HDassert(f);
+    HDassert(oh);
+
+    /* Check if this object header is tracking times */
+    if(oh->flags & H5O_HDR_STORE_TIMES) {
+        /* Get current time */
+        now = H5_now();
+
+        /* Check version, to determine how to store time information */
+        if(oh->version == H5O_VERSION_1) {
+            size_t	idx;                    /* Index of modification time message to update */
+
+            /* Look for existing message */
+            for(idx = 0; idx < oh->nmesgs; idx++)
+                if(H5O_MSG_MTIME == oh->mesg[idx].type || H5O_MSG_MTIME_NEW == oh->mesg[idx].type)
+                    break;
+
+            /* Create a new message, if necessary */
+            if(idx == oh->nmesgs) {
+                unsigned mesg_flags = 0;        /* Flags for message in object header */
+
+                /* If we would have to create a new message, but we aren't 'forcing' it, get out now */
+                if(!force)
+                    HGOTO_DONE(SUCCEED);        /*nothing to do*/
+
+                /* Allocate space for the modification time message */
+                if(H5O_msg_alloc(f, dxpl_id, oh, H5O_MSG_MTIME_NEW, &mesg_flags, &now, &idx) < 0)
+                    HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to allocate space for modification time message")
+
+                /* Set the message's flags if appropriate */
+                oh->mesg[idx].flags = (uint8_t)mesg_flags;
+            } /* end if */
+
+            /* Protect chunk */
+            if(NULL == (chk_proxy = H5O_chunk_protect(f, dxpl_id, oh, oh->mesg[idx].chunkno)))
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header chunk")
+
+            /* Allocate 'native' space, if necessary */
+            if(NULL == oh->mesg[idx].native) {
+                if(NULL == (oh->mesg[idx].native = H5FL_MALLOC(time_t)))
+                    HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "memory allocation failed for modification time message")
+            } /* end if */
+
+            /* Update the message */
+            *((time_t *)(oh->mesg[idx].native)) = now;
+
+            /* Mark the message as dirty */
+            oh->mesg[idx].dirty = TRUE;
+            chk_dirtied = TRUE;
+        } /* end if */
+        else {
+            /* XXX: For now, update access time & change fields in the object header */
+            /* (will need to add some code to update modification time appropriately) */
+            oh->atime = oh->ctime = now;
+
+            /* Mark object header as dirty in cache */
+            if(H5AC_mark_entry_dirty(oh) < 0)
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTMARKDIRTY, FAIL, "unable to mark object header as dirty")
+        } /* end else */
+    } /* end if */
+
+done:
+    /* Release chunk */
+    if(chk_proxy && H5O_chunk_unprotect(f, dxpl_id, chk_proxy, chk_dirtied) < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to unprotect object header chunk")
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_touch_oh() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_touch
+ *
+ * Purpose:	Touch an object by setting the modification time to the
+ *		current time and marking the object as dirty.  Unless FORCE
+ *		is non-zero, nothing happens if there is no MTIME message in
+ *		the object header.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Robb Matzke
+ *              Monday, July 27, 1998
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_touch(const H5O_loc_t *loc, hbool_t force, hid_t dxpl_id)
+{
+    H5O_t	*oh = NULL;             /* Object header to modify */
+    unsigned 	oh_flags = H5AC__NO_FLAGS_SET; /* Flags for unprotecting object header */
+    herr_t      ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* check args */
+    HDassert(loc);
+
+    /* Get the object header */
+    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__NO_FLAGS_SET, FALSE)))
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
+
+    /* Create/Update the modification time message */
+    if(H5O_touch_oh(loc->file, dxpl_id, oh, force) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "unable to update object modificaton time")
+
+    /* Mark object header as changed */
+    oh_flags |= H5AC__DIRTIED_FLAG;
+
+done:
+    if(oh && H5O_unprotect(loc, dxpl_id, oh, oh_flags) < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_touch() */
+
+#ifdef H5O_ENABLE_BOGUS
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_bogus_oh
+ *
+ * Purpose:	Create a "bogus" message unless one already exists.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *              <koziol@ncsa.uiuc.edu>
+ *              Tuesday, January 21, 2003
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_bogus_oh(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned bogus_id, unsigned mesg_flags)
+{
+    size_t	idx;                /* Local index variable */
+    H5O_msg_class_t *type;	    /* Message class type */
+    herr_t ret_value = SUCCEED;     /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    HDassert(f);
+    HDassert(oh);
+
+    /* Look for existing message */
+    for(idx = 0; idx < oh->nmesgs; idx++)
+        if(H5O_MSG_BOGUS_VALID == oh->mesg[idx].type || H5O_MSG_BOGUS_INVALID == oh->mesg[idx].type)
+            break;
+
+    /* Create a new message */
+    if(idx == oh->nmesgs) {
+        H5O_bogus_t *bogus;             /* Pointer to the bogus information */
+
+        /* Allocate the native message in memory */
+	if(NULL == (bogus = H5MM_malloc(sizeof(H5O_bogus_t))))
+	    HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "memory allocation failed for 'bogus' message")
+
+        /* Update the native value */
+        bogus->u = H5O_BOGUS_VALUE;
+
+	if(bogus_id == H5O_BOGUS_VALID_ID)
+	    type = H5O_MSG_BOGUS_VALID;
+	else if(bogus_id == H5O_BOGUS_INVALID_ID)
+	    type = H5O_MSG_BOGUS_INVALID;
+	else
+	    HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "invalid ID for 'bogus' message")
+
+        /* Allocate space in the object header for bogus message */
+	if(H5O_msg_alloc(f, dxpl_id, oh, type, &mesg_flags, bogus, &idx) < 0)
+	    HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to allocate space for 'bogus' message")
+
+        /* Point to "bogus" information (take it over) */
+	oh->mesg[idx].native = bogus;
+
+        /* Set the appropriate flags for the message */
+        oh->mesg[idx].flags = mesg_flags;
+
+        /* Mark the message and object header as dirty */
+        oh->mesg[idx].dirty = TRUE;
+        oh->cache_info.is_dirty = TRUE;
+    } /* end if */
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_bogus_oh() */
+#endif /* H5O_ENABLE_BOGUS */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_delete
+ *
+ * Purpose:	Delete an object header from a file.  This frees the file
+ *              space used for the object header (and it's continuation blocks)
+ *              and also walks through each header message and asks it to
+ *              remove all the pieces of the file referenced by the header.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *		koziol@ncsa.uiuc.edu
+ *		Mar 19 2003
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_delete(H5F_t *f, hid_t dxpl_id, haddr_t addr)
+{
+    H5O_t *oh = NULL;           /* Object header information */
+    H5O_loc_t loc;              /* Object location for object to delete */
+    unsigned oh_flags = H5AC__NO_FLAGS_SET; /* Flags for unprotecting object header */
+    hbool_t corked;
+    herr_t ret_value = SUCCEED; /* Return value */
+
+    FUNC_ENTER_NOAPI_TAG(dxpl_id, addr, FAIL)
+
+    /* Check args */
+    HDassert(f);
+    HDassert(H5F_addr_defined(addr));
+
+    /* Set up the object location */
+    loc.file = f;
+    loc.addr = addr;
+    loc.holding_file = FALSE;
+
+    /* Get the object header information */
+    if(NULL == (oh = H5O_protect(&loc, dxpl_id, H5AC__NO_FLAGS_SET, FALSE)))
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
+
+    /* Delete object */
+    if(H5O_delete_oh(f, dxpl_id, oh) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "can't delete object from file")
+
+    /* Uncork cache entries with tag: addr */
+    if(H5AC_cork(f, addr, H5AC__GET_CORKED, &corked) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "unable to retrieve an object's cork status")
+    if(corked)
+        if(H5AC_cork(f, addr, H5AC__UNCORK, NULL) < 0)
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTUNCORK, FAIL, "unable to uncork an object")
+
+    /* Mark object header as deleted */
+    oh_flags = H5AC__DIRTIED_FLAG | H5AC__DELETED_FLAG | H5AC__FREE_FILE_SPACE_FLAG;
+
+done:
+    if(oh && H5O_unprotect(&loc, dxpl_id, oh, oh_flags) < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_PROTECT, FAIL, "unable to release object header")
+
+    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+} /* end H5O_delete() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_delete_oh
+ *
+ * Purpose:	Internal function to:
+ *              Delete an object header from a file.  This frees the file
+ *              space used for the object header (and it's continuation blocks)
+ *              and also walks through each header message and asks it to
+ *              remove all the pieces of the file referenced by the header.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *		koziol@ncsa.uiuc.edu
+ *		Mar 19 2003
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5O_delete_oh(H5F_t *f, hid_t dxpl_id, H5O_t *oh)
+{
+    H5O_mesg_t *curr_msg;       /* Pointer to current message being operated on */
+    unsigned	u;
+    herr_t ret_value = SUCCEED;   /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    /* Check args */
+    HDassert(f);
+    HDassert(oh);
+
+    /* Walk through the list of object header messages, asking each one to
+     * delete any file space used
+     */
+    for(u = 0, curr_msg = &oh->mesg[0]; u < oh->nmesgs; u++, curr_msg++) {
+        /* Free any space referred to in the file from this message */
+        if(H5O_delete_mesg(f, dxpl_id, oh, curr_msg) < 0)
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "unable to delete file space for object header message")
+    } /* end for */
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_delete_oh() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_obj_type
+ *
+ * Purpose:	Retrieves the type of object pointed to by `loc'.
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Robb Matzke
+ *              Wednesday, November  4, 1998
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_obj_type(const H5O_loc_t *loc, H5O_type_t *obj_type, hid_t dxpl_id)
+{
+    H5O_t	*oh = NULL;             /* Object header for location */
+    herr_t      ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_NOAPI_TAG(dxpl_id, loc->addr, FAIL)
+
+    /* Load the object header */
+    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
+
+    /* Retrieve the type of the object */
+    if(H5O_obj_type_real(oh, obj_type) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to determine object type")
+
+done:
+    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+	HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
+
+    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+} /* end H5O_obj_type() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_obj_type_real
+ *
+ * Purpose:	Returns the type of object pointed to by `oh'.
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *              Monday, November 21, 2005
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5O_obj_type_real(H5O_t *oh, H5O_type_t *obj_type)
+{
+    const H5O_obj_class_t *obj_class;           /* Class of object for header */
+
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    /* Sanity check */
+    HDassert(oh);
+    HDassert(obj_type);
+
+    /* Look up class for object header */
+    if(NULL == (obj_class = H5O_obj_class_real(oh))) {
+        /* Clear error stack from "failed" class lookup */
+        H5E_clear_stack(NULL);
+
+        /* Set type to "unknown" */
+        *obj_type = H5O_TYPE_UNKNOWN;
+    }
+    else {
+        /* Set object type */
+        *obj_type = obj_class->type;
+    }
+
+    FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5O_obj_type_real() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_obj_class
+ *
+ * Purpose:	Returns the class of object pointed to by `loc'.
+ *
+ * Return:	Success:	An object class
+ *		Failure:	NULL
+ *
+ * Programmer:	Quincey Koziol
+ *              Monday, November  6, 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+const H5O_obj_class_t *
+H5O_obj_class(const H5O_loc_t *loc, hid_t dxpl_id)
+{
+    H5O_t	*oh = NULL;                     /* Object header for location */
+    const H5O_obj_class_t *ret_value = NULL;    /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT_TAG(dxpl_id, loc->addr, NULL)
+
+    /* Load the object header */
+    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, NULL, "unable to load object header")
+
+    /* Test whether entry qualifies as a particular type of object */
+    if(NULL == (ret_value = H5O_obj_class_real(oh)))
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, NULL, "unable to determine object type")
+
+done:
+    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+	HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, NULL, "unable to release object header")
+
+    FUNC_LEAVE_NOAPI_TAG(ret_value, NULL)
+} /* end H5O_obj_class() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_obj_class_real
+ *
+ * Purpose:	Returns the class of object pointed to by `oh'.
+ *
+ * Return:	Success:	An object class
+ *		Failure:	NULL
+ *
+ * Programmer:	Quincey Koziol
+ *              Monday, November 21, 2005
+ *
+ *-------------------------------------------------------------------------
+ */
+static const H5O_obj_class_t *
+H5O_obj_class_real(H5O_t *oh)
+{
+    size_t	i;                      /* Local index variable */
+    const H5O_obj_class_t *ret_value = NULL;   /* Return value */
+
+    FUNC_ENTER_NOAPI(NULL)
+
+    /* Sanity check */
+    HDassert(oh);
+
+    /* Test whether entry qualifies as a particular type of object */
+    /* (Note: loop is in reverse order, to test specific objects first) */
+    for(i = NELMTS(H5O_obj_class_g); i > 0; --i) {
+        htri_t	isa;            /* Is entry a particular type? */
+
+        if((isa = (H5O_obj_class_g[i - 1]->isa)(oh)) < 0)
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, NULL, "unable to determine object type")
+        else if(isa)
+            HGOTO_DONE(H5O_obj_class_g[i - 1])
+    }
+
+    if(0 == i)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, NULL, "unable to determine object type")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_obj_class_real() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_get_loc
+ *
+ * Purpose:	Gets the object location for an object given its ID.
+ *
+ * Return:	Success:	Pointer to H5O_loc_t
+ *		Failure:	NULL
+ *
+ * Programmer:	James Laird
+ *		July 25 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+H5O_loc_t *
+H5O_get_loc(hid_t object_id)
+{
+    H5O_loc_t   *ret_value = NULL;      /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    switch(H5I_get_type(object_id)) {
+        case H5I_GROUP:
+            if(NULL == (ret_value = H5O_OBJ_GROUP->get_oloc(object_id)))
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, NULL, "unable to get object location from group ID")
+            break;
+
+        case H5I_DATASET:
+            if(NULL == (ret_value = H5O_OBJ_DATASET->get_oloc(object_id)))
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, NULL, "unable to get object location from dataset ID")
+            break;
+
+        case H5I_DATATYPE:
+            if(NULL == (ret_value = H5O_OBJ_DATATYPE->get_oloc(object_id)))
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, NULL, "unable to get object location from datatype ID")
+            break;
+
+        case H5I_UNINIT:
+        case H5I_BADID:
+        case H5I_FILE:
+        case H5I_DATASPACE:
+        case H5I_ATTR:
+        case H5I_REFERENCE:
+        case H5I_VFL:
+        case H5I_GENPROP_CLS:
+        case H5I_GENPROP_LST:
+        case H5I_ERROR_CLASS:
+        case H5I_ERROR_MSG:
+        case H5I_ERROR_STACK:
+        case H5I_NTYPES:
+        default:
+            HGOTO_ERROR(H5E_OHDR, H5E_BADTYPE, NULL, "invalid object type")
+    } /* end switch */
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_get_loc() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_loc_reset
+ *
+ * Purpose:	Reset a object location to an empty state
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *              Monday, September 19, 2005
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_loc_reset(H5O_loc_t *loc)
+{
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    /* Check arguments */
+    HDassert(loc);
+
+    /* Clear the object location to an empty state */
+    HDmemset(loc, 0, sizeof(H5O_loc_t));
+    loc->addr = HADDR_UNDEF;
+
+    FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5O_loc_reset() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5O_loc_copy
+ *
+ * Purpose:     Copy object location information
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *              koziol@ncsa.uiuc.edu
+ *              Monday, September 19, 2005
+ *
+ * Notes:       'depth' parameter determines how much of the group entry
+ *              structure we want to copy.  The values are:
+ *                  H5_COPY_SHALLOW - Copy all the field values from the source
+ *                      to the destination, but not copying objects pointed to.
+ *                      (Destination "takes ownership" of objects pointed to)
+ *                  H5_COPY_DEEP - Copy all the fields from the source to
+ *                      the destination, deep copying objects pointed to.
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_loc_copy(H5O_loc_t *dst, H5O_loc_t *src, H5_copy_depth_t depth)
+{
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    /* Check arguments */
+    HDassert(src);
+    HDassert(dst);
+    HDassert(depth == H5_COPY_SHALLOW || depth == H5_COPY_DEEP);
+
+    /* Copy the top level information */
+    HDmemcpy(dst, src, sizeof(H5O_loc_t));
+
+    /* Deep copy the names */
+    if(depth == H5_COPY_DEEP) {
+        /* If the original entry was holding open the file, this one should
+         * hold it open, too.
+         */
+        if(src->holding_file)
+            H5F_INCR_NOPEN_OBJS(dst->file);
+    }
+    else if(depth == H5_COPY_SHALLOW) {
+        H5O_loc_reset(src);
+    }
+
+    FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5O_loc_copy() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_loc_hold_file
+ *
+ * Purpose:	Have this object header hold a file open until it is
+ *              released.
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	James Laird
+ *              Wednesday, August 16, 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_loc_hold_file(H5O_loc_t *loc)
+{
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    /* Check arguments */
+    HDassert(loc);
+    HDassert(loc->file);
+
+    /* If this location is not already holding its file open, do so. */
+    if(!loc->holding_file) {
+        H5F_INCR_NOPEN_OBJS(loc->file);
+        loc->holding_file = TRUE;
+    }
+
+    FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5O_loc_hold_file() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_loc_free
+ *
+ * Purpose:	Release resources used by this object header location.
+ *              Not to be confused with H5O_close; this is used on
+ *              locations that don't correspond to open objects.
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	James Laird
+ *              Wednesday, August 16, 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_loc_free(H5O_loc_t *loc)
+{
+    herr_t ret_value = SUCCEED;
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    /* Check arguments */
+    HDassert(loc);
+
+    /* If this location is holding its file open try to close the file. */
+    if(loc->holding_file) {
+        H5F_DECR_NOPEN_OBJS(loc->file);
+        loc->holding_file = FALSE;
+        if(H5F_NOPEN_OBJS(loc->file) <= 0) {
+            if(H5F_try_close(loc->file, NULL) < 0)
+                HGOTO_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, FAIL, "can't close file")
+        }
+    }
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_loc_free() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_get_hdr_info
+ *
+ * Purpose:	Retrieve the object header information for an object
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		September 22 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_get_hdr_info(const H5O_loc_t *loc, hid_t dxpl_id, H5O_hdr_info_t *hdr)
+{
+    H5O_t *oh = NULL;                   /* Object header */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Check args */
+    HDassert(loc);
+    HDassert(hdr);
+
+    /* Reset the object header info structure */
+    HDmemset(hdr, 0, sizeof(*hdr));
+
+    /* Get the object header */
+    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, FAIL, "unable to load object header")
+
+    /* Get the information for the object header */
+    if(H5O_get_hdr_info_real(oh, hdr) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't retrieve object header info")
+
+done:
+    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+	HDONE_ERROR(H5E_OHDR, H5E_PROTECT, FAIL, "unable to release object header")
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_get_hdr_info() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_get_hdr_info_real
+ *
+ * Purpose:	Internal routine to retrieve the object header information for an object
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		September 22 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5O_get_hdr_info_real(const H5O_t *oh, H5O_hdr_info_t *hdr)
+{
+    const H5O_mesg_t *curr_msg;         /* Pointer to current message being operated on */
+    const H5O_chunk_t *curr_chunk;	/* Pointer to current message being operated on */
+    unsigned u;                         /* Local index variable */
+
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    /* Check args */
+    HDassert(oh);
+    HDassert(hdr);
+
+    /* Set the version for the object header */
+    hdr->version = oh->version;
+
+    /* Set the number of messages & chunks */
+    H5_CHECKED_ASSIGN(hdr->nmesgs, unsigned, oh->nmesgs, size_t);
+    H5_CHECKED_ASSIGN(hdr->nchunks, unsigned, oh->nchunks, size_t);
+
+    /* Set the status flags */
+    hdr->flags = oh->flags;
+
+    /* Iterate over all the messages, accumulating message size & type information */
+    hdr->space.meta = (hsize_t)H5O_SIZEOF_HDR(oh) + (hsize_t)(H5O_SIZEOF_CHKHDR_OH(oh) * (oh->nchunks - 1));
+    hdr->space.mesg = 0;
+    hdr->space.free = 0;
+    hdr->mesg.present = 0;
+    hdr->mesg.shared = 0;
+    for(u = 0, curr_msg = &oh->mesg[0]; u < oh->nmesgs; u++, curr_msg++) {
+        uint64_t type_flag;             /* Flag for message type */
+
+        /* Accumulate space usage information, based on the type of message */
+        if(H5O_NULL_ID == curr_msg->type->id)
+            hdr->space.free += (hsize_t)((size_t)H5O_SIZEOF_MSGHDR_OH(oh) + curr_msg->raw_size);
+        else if(H5O_CONT_ID == curr_msg->type->id)
+            hdr->space.meta += (hsize_t)((size_t)H5O_SIZEOF_MSGHDR_OH(oh) + curr_msg->raw_size);
+        else {
+            hdr->space.meta += (hsize_t)H5O_SIZEOF_MSGHDR_OH(oh);
+            hdr->space.mesg += curr_msg->raw_size;
+        } /* end else */
+
+        /* Set flag to indicate presence of message type */
+        type_flag = ((uint64_t)1) << curr_msg->type->id;
+        hdr->mesg.present |= type_flag;
+
+        /* Set flag if the message is shared in some way */
+        if(curr_msg->flags & H5O_MSG_FLAG_SHARED)                                   \
+            hdr->mesg.shared |= type_flag;
+    } /* end for */
+
+    /* Iterate over all the chunks, adding any gaps to the free space */
+    hdr->space.total = 0;
+    for(u = 0, curr_chunk = &oh->chunk[0]; u < oh->nchunks; u++, curr_chunk++) {
+        /* Accumulate the size of the header on disk */
+        hdr->space.total += curr_chunk->size;
+
+        /* If the chunk has a gap, add it to the free space */
+        hdr->space.free += curr_chunk->gap;
+    } /* end for */
+
+    /* Sanity check that all the bytes are accounted for */
+    HDassert(hdr->space.total == (hdr->space.free + hdr->space.meta + hdr->space.mesg));
+
+    FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5O_get_hdr_info_real() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_get_info
+ *
+ * Purpose:	Retrieve the information for an object
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		November 21 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_get_info(const H5O_loc_t *loc, hid_t dxpl_id, hbool_t want_ih_info,
+    H5O_info_t *oinfo)
+{
+    const H5O_obj_class_t *obj_class;   /* Class of object for header */
+    H5O_t *oh = NULL;                   /* Object header */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI_TAG(dxpl_id, loc->addr, FAIL)
+
+    /* Check args */
+    HDassert(loc);
+    HDassert(oinfo);
+
+    /* Get the object header */
+    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
+
+    /* Reset the object info structure */
+    HDmemset(oinfo, 0, sizeof(*oinfo));
+
+    /* Retrieve the file's fileno */
+    H5F_GET_FILENO(loc->file, oinfo->fileno);
+
+    /* Set the object's address */
+    oinfo->addr = loc->addr;
+
+    /* Get class for object */
+    if(NULL == (obj_class = H5O_obj_class_real(oh)))
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "unable to determine object class")
+
+    /* Retrieve the type of the object */
+    oinfo->type = obj_class->type;
+
+    /* Set the object's reference count */
+    oinfo->rc = oh->nlink;
+
+    /* Get modification time for object */
+    if(oh->version > H5O_VERSION_1) {
+        oinfo->atime = oh->atime;
+        oinfo->mtime = oh->mtime;
+        oinfo->ctime = oh->ctime;
+        oinfo->btime = oh->btime;
+    } /* end if */
+    else {
+        htri_t	exists;                 /* Flag if header message of interest exists */
+
+        /* No information for access & modification fields */
+        /* (we stopped updating the "modification time" header message for
+         *      raw data changes, so the "modification time" header message
+         *      is closest to the 'change time', in POSIX terms - QAK)
+         */
+        oinfo->atime = 0;
+        oinfo->mtime = 0;
+        oinfo->btime = 0;
+
+        /* Might be information for modification time */
+        if((exists = H5O_msg_exists_oh(oh, H5O_MTIME_ID)) < 0)
+            HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, FAIL, "unable to check for MTIME message")
+        if(exists > 0) {
+            /* Get "old style" modification time info */
+            if(NULL == H5O_msg_read_oh(loc->file, dxpl_id, oh, H5O_MTIME_ID, &oinfo->ctime))
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't read MTIME message")
+        } /* end if */
+        else {
+            /* Check for "new style" modification time info */
+            if((exists = H5O_msg_exists_oh(oh, H5O_MTIME_NEW_ID)) < 0)
+                HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, FAIL, "unable to check for MTIME_NEW message")
+            if(exists > 0) {
+                /* Get "new style" modification time info */
+                if(NULL == H5O_msg_read_oh(loc->file, dxpl_id, oh, H5O_MTIME_NEW_ID, &oinfo->ctime))
+                    HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't read MTIME_NEW message")
+            } /* end if */
+            else
+                oinfo->ctime = 0;
+        } /* end else */
+    } /* end else */
+
+    /* Get the information for the object header */
+    if(H5O_get_hdr_info_real(oh, &oinfo->hdr) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't retrieve object header info")
+
+    /* Retrieve # of attributes */
+    if(H5O_attr_count_real(loc->file, dxpl_id, oh, &oinfo->num_attrs) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't retrieve attribute count")
+
+    /* Get B-tree & heap metadata storage size, if requested */
+    if(want_ih_info) {
+        /* Check for 'bh_info' callback for this type of object */
+        if(obj_class->bh_info) {
+            /* Call the object's class 'bh_info' routine */
+            if((obj_class->bh_info)(loc, dxpl_id, oh, &oinfo->meta_size.obj) < 0)
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't retrieve object's btree & heap info")
+        } /* end if */
+
+        /* Get B-tree & heap info for any attributes */
+        if(oinfo->num_attrs > 0) {
+            if(H5O_attr_bh_info(loc->file, dxpl_id, oh, &oinfo->meta_size.attr) < 0)
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't retrieve attribute btree & heap info")
+        } /* end if */
+    } /* end if */
+
+done:
+    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
+
+    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+} /* end H5O_get_info() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_get_create_plist
+ *
+ * Purpose:	Retrieve the object creation properties for an object
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		November 28 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_get_create_plist(const H5O_loc_t *loc, hid_t dxpl_id, H5P_genplist_t *oc_plist)
+{
+    H5O_t *oh = NULL;                   /* Object header */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Check args */
+    HDassert(loc);
+    HDassert(oc_plist);
+
+    /* Get the object header */
+    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
+
+    /* Set property values, if they were used for the object */
+    if(oh->version > H5O_VERSION_1) {
+        uint8_t ohdr_flags;             /* "User-visible" object header status flags */
+
+        /* Set attribute storage values */
+        if(H5P_set(oc_plist, H5O_CRT_ATTR_MAX_COMPACT_NAME, &oh->max_compact) < 0)
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set max. # of compact attributes in property list")
+        if(H5P_set(oc_plist, H5O_CRT_ATTR_MIN_DENSE_NAME, &oh->min_dense) < 0)
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set min. # of dense attributes in property list")
+
+        /* Mask off non-"user visible" flags */
+        ohdr_flags = oh->flags & (H5O_HDR_ATTR_CRT_ORDER_TRACKED | H5O_HDR_ATTR_CRT_ORDER_INDEXED | H5O_HDR_STORE_TIMES);
+
+        /* Set object header flags */
+        if(H5P_set(oc_plist, H5O_CRT_OHDR_FLAGS_NAME, &ohdr_flags) < 0)
+            HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set object header flags")
+    } /* end if */
+
+done:
+    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_get_create_plist() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_get_nlinks
+ *
+ * Purpose:	Retrieve the number of link messages read in from the file
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		March 11 2007
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_get_nlinks(const H5O_loc_t *loc, hid_t dxpl_id, hsize_t *nlinks)
+{
+    H5O_t *oh = NULL;                   /* Object header */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Check args */
+    HDassert(loc);
+    HDassert(nlinks);
+
+    /* Get the object header */
+    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
+
+    /* Retrieve the # of link messages seen when the object header was loaded */
+    *nlinks = oh->link_msgs_seen;
+
+done:
+    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_get_nlinks() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_obj_create
+ *
+ * Purpose:	Creates an object, in an abstract manner.
+ *
+ * Return:	Success:	Pointer to object opened
+ *		Failure:	NULL
+ *
+ * Programmer:	Quincey Koziol
+ *		April 9 2007
+ *
+ *-------------------------------------------------------------------------
+ */
+void *
+H5O_obj_create(H5F_t *f, H5O_type_t obj_type, void *crt_info, H5G_loc_t *obj_loc,
+    hid_t dxpl_id)
+{
+    size_t u;                           /* Local index variable */
+    void *ret_value = NULL;             /* Return value */
+
+    FUNC_ENTER_NOAPI(NULL)
+
+    /* Sanity checks */
+    HDassert(f);
+    HDassert(obj_type >= H5O_TYPE_GROUP && obj_type <= H5O_TYPE_NAMED_DATATYPE);
+    HDassert(crt_info);
+    HDassert(obj_loc);
+
+    /* Iterate through the object classes */
+    for(u = 0; u < NELMTS(H5O_obj_class_g); u++) {
+        /* Check for correct type of object to create */
+	if(H5O_obj_class_g[u]->type == obj_type) {
+            /* Call the object class's 'create' routine */
+            HDassert(H5O_obj_class_g[u]->create);
+            if(NULL == (ret_value = H5O_obj_class_g[u]->create(f, crt_info, obj_loc, dxpl_id)))
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTOPENOBJ, NULL, "unable to open object")
+
+            /* Break out of loop */
+            break;
+        } /* end if */
+    } /* end for */
+    HDassert(ret_value);
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_obj_create() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_get_oh_addr
+ *
+ * Purpose:	Retrieve the address of the object header
+ *
+ * Note:	This routine participates in the "Inlining C struct access"
+ *		pattern, don't call it directly, use the appropriate macro
+ *		defined in H5Oprivate.h.
+ *
+ * Return:	Success:	Valid haddr_t
+ *		Failure:	HADDR_UNDEF
+ *
+ * Programmer:	Quincey Koziol
+ *		March 15 2007
+ *
+ *-------------------------------------------------------------------------
+ */
+haddr_t
+H5O_get_oh_addr(const H5O_t *oh)
+{
+    /* Use FUNC_ENTER_NOAPI_NOINIT_NOERR here to avoid performance issues */
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    HDassert(oh);
+    HDassert(oh->chunk);
+
+    FUNC_LEAVE_NOAPI(oh->chunk[0].addr)
+} /* end H5O_get_oh_addr() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_get_rc_and_type
+ *
+ * Purpose:	Retrieve an object's reference count and type
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		November  4 2007
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_get_rc_and_type(const H5O_loc_t *loc, hid_t dxpl_id, unsigned *rc, H5O_type_t *otype)
+{
+    H5O_t *oh = NULL;                   /* Object header */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Check args */
+    HDassert(loc);
+
+    /* Get the object header */
+    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
+
+    /* Set the object's reference count */
+    if(rc)
+        *rc = oh->nlink;
+
+    /* Retrieve the type of the object */
+    if(otype)
+        if(H5O_obj_type_real(oh, otype) < 0)
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to determine object type")
+
+done:
+    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_get_rc_and_type() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5O_free_visit_visited
+ *
+ * Purpose:     Free the key for an object visited during a group traversal
+ *
+ * Return:      Non-negative on success, negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *	        Nov 25, 2007
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5O_free_visit_visited(void *item, void H5_ATTR_UNUSED *key, void H5_ATTR_UNUSED *operator_data/*in,out*/)
+{
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    item = H5FL_FREE(H5_obj_t, item);
+
+    FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5O_free_visit_visited() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_visit_cb
+ *
+ * Purpose:     Callback function for recursively visiting objects from a group
+ *
+ * Return:	Success:        Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *	        Nov 25, 2007
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5O_visit_cb(hid_t H5_ATTR_UNUSED group, const char *name, const H5L_info_t *linfo,
+    void *_udata)
+{
+    H5O_iter_visit_ud_t *udata = (H5O_iter_visit_ud_t *)_udata;     /* User data for callback */
+    H5G_loc_t   obj_loc;                /* Location of object */
+    H5G_name_t  obj_path;            	/* Object's group hier. path */
+    H5O_loc_t   obj_oloc;            	/* Object's object location */
+    hbool_t     obj_found = FALSE;      /* Object at 'name' found */
+    herr_t ret_value = H5_ITER_CONT;    /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    /* Sanity check */
+    HDassert(name);
+    HDassert(linfo);
+    HDassert(udata);
+
+    /* Check if this is a hard link */
+    if(linfo->type == H5L_TYPE_HARD) {
+        H5_obj_t obj_pos;       /* Object "position" for this object */
+
+        /* Set up opened group location to fill in */
+        obj_loc.oloc = &obj_oloc;
+        obj_loc.path = &obj_path;
+        H5G_loc_reset(&obj_loc);
+
+        /* Find the object using the LAPL passed in */
+        /* (Correctly handles mounted files) */
+        if(H5G_loc_find(udata->start_loc, name, &obj_loc/*out*/, udata->lapl_id, udata->dxpl_id) < 0)
+            HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, H5_ITER_ERROR, "object not found")
+        obj_found = TRUE;
+
+        /* Construct unique "position" for this object */
+        H5F_GET_FILENO(obj_oloc.file, obj_pos.fileno);
+        obj_pos.addr = obj_oloc.addr;
+
+        /* Check if we've seen the object the link references before */
+        if(NULL == H5SL_search(udata->visited, &obj_pos)) {
+            H5O_info_t oinfo;           /* Object info */
+
+            /* Get the object's info */
+            if(H5O_get_info(&obj_oloc, udata->dxpl_id, TRUE, &oinfo) < 0)
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, H5_ITER_ERROR, "unable to get object info")
+
+            /* Make the application callback */
+            ret_value = (udata->op)(udata->obj_id, name, &oinfo, udata->op_data);
+
+            /* Check for continuing to visit objects */
+            if(ret_value == H5_ITER_CONT) {
+                /* If its ref count is > 1, we add it to the list of visited objects */
+                /* (because it could come up again during traversal) */
+                if(oinfo.rc > 1) {
+                    H5_obj_t *new_node;                  /* New object node for visited list */
+
+                    /* Allocate new object "position" node */
+                    if((new_node = H5FL_MALLOC(H5_obj_t)) == NULL)
+                        HGOTO_ERROR(H5E_OHDR, H5E_NOSPACE, H5_ITER_ERROR, "can't allocate object node")
+
+                    /* Set node information */
+                    *new_node = obj_pos;
+
+                    /* Add to list of visited objects */
+                    if(H5SL_insert(udata->visited, new_node, new_node) < 0)
+                        HGOTO_ERROR(H5E_OHDR, H5E_CANTINSERT, H5_ITER_ERROR, "can't insert object node into visited list")
+                } /* end if */
+            } /* end if */
+        } /* end if */
+    } /* end if */
+
+done:
+    /* Release resources */
+    if(obj_found && H5G_loc_free(&obj_loc) < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_CANTRELEASE, H5_ITER_ERROR, "can't free location")
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_visit_cb() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_visit
+ *
+ * Purpose:	Recursively visit an object and all the objects reachable
+ *              from it.  If the starting object is a group, all the objects
+ *              linked to from that group will be visited.  Links within
+ *              each group are visited according to the order within the
+ *              specified index (unless the specified index does not exist for
+ *              a particular group, then the "name" index is used).
+ *
+ *              NOTE: Soft links and user-defined links are ignored during
+ *              this operation.
+ *
+ *              NOTE: Each _object_ reachable from the initial group will only
+ *              be visited once.  If multiple hard links point to the same
+ *              object, the first link to the object's path (according to the
+ *              iteration index and iteration order given) will be used to in
+ *              the callback about the object.
+ *
+ * Return:	Success:	The return value of the first operator that
+ *				returns non-zero, or zero if all members were
+ *				processed with no operator returning non-zero.
+ *
+ *		Failure:	Negative if something goes wrong within the
+ *				library, or the negative value returned by one
+ *				of the operators.
+ *
+ * Programmer:	Quincey Koziol
+ *		November 24 2007
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_visit(hid_t loc_id, const char *obj_name, H5_index_t idx_type,
+    H5_iter_order_t order, H5O_iterate_t op, void *op_data, hid_t lapl_id,
+    hid_t dxpl_id)
+{
+    H5O_iter_visit_ud_t udata;  /* User data for callback */
+    H5G_loc_t	loc;            /* Location of reference object */
+    H5G_loc_t   obj_loc;        /* Location used to open object */
+    H5G_name_t  obj_path;       /* Opened object group hier. path */
+    H5O_loc_t   obj_oloc;       /* Opened object object location */
+    hbool_t     loc_found = FALSE;      /* Entry at 'name' found */
+    H5O_info_t  oinfo;          /* Object info struct */
+    hid_t       obj_id = (-1);  /* ID of object */
+    herr_t      ret_value = FAIL;       /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Portably initialize user data struct to zeros */
+    HDmemset(&udata, 0, sizeof(udata));
+
+    /* Check args */
+    if(H5G_loc(loc_id, &loc) < 0)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
+
+    /* Set up opened group location to fill in */
+    obj_loc.oloc = &obj_oloc;
+    obj_loc.path = &obj_path;
+    H5G_loc_reset(&obj_loc);
+
+    /* Find the object's location */
+    if(H5G_loc_find(&loc, obj_name, &obj_loc/*out*/, lapl_id, dxpl_id) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, FAIL, "object not found")
+    loc_found = TRUE;
+
+    /* Get the object's info */
+    if(H5O_get_info(&obj_oloc, dxpl_id, TRUE, &oinfo) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "unable to get object info")
+
+    /* Open the object */
+    /* (Takes ownership of the obj_loc information) */
+    if((obj_id = H5O_open_by_loc(&obj_loc, lapl_id, dxpl_id, TRUE)) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTOPENOBJ, FAIL, "unable to open object")
+
+    /* Make callback for starting object */
+    if((ret_value = op(obj_id, ".", &oinfo, op_data)) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_BADITER, FAIL, "can't visit objects")
+
+    /* Check return value of first callback */
+    if(ret_value != H5_ITER_CONT)
+        HGOTO_DONE(ret_value);
+
+    /* Check for object being a group */
+    if(oinfo.type == H5O_TYPE_GROUP) {
+        H5G_loc_t	start_loc;          /* Location of starting group */
+
+        /* Get the location of the starting group */
+        if(H5G_loc(obj_id, &start_loc) < 0)
+            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
+
+        /* Set up user data for visiting links */
+        udata.obj_id = obj_id;
+        udata.start_loc = &start_loc;
+        udata.lapl_id = lapl_id;
+        udata.dxpl_id = dxpl_id;
+        udata.op = op;
+        udata.op_data = op_data;
+
+        /* Create skip list to store visited object information */
+        if((udata.visited = H5SL_create(H5SL_TYPE_OBJ, NULL)) == NULL)
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTCREATE, FAIL, "can't create skip list for visited objects")
+
+        /* If its ref count is > 1, we add it to the list of visited objects */
+        /* (because it could come up again during traversal) */
+        if(oinfo.rc > 1) {
+            H5_obj_t *obj_pos;                  /* New object node for visited list */
+
+            /* Allocate new object "position" node */
+            if((obj_pos = H5FL_MALLOC(H5_obj_t)) == NULL)
+                HGOTO_ERROR(H5E_OHDR, H5E_NOSPACE, FAIL, "can't allocate object node")
+
+            /* Construct unique "position" for this object */
+            obj_pos->fileno = oinfo.fileno;
+            obj_pos->addr = oinfo.addr;
+
+            /* Add to list of visited objects */
+            if(H5SL_insert(udata.visited, obj_pos, obj_pos) < 0)
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTINSERT, FAIL, "can't insert object node into visited list")
+        } /* end if */
+
+        /* Call internal group visitation routine */
+        if((ret_value = H5G_visit(obj_id, ".", idx_type, order, H5O_visit_cb, &udata, lapl_id, dxpl_id)) < 0)
+            HGOTO_ERROR(H5E_OHDR, H5E_BADITER, FAIL, "object visitation failed")
+    } /* end if */
+
+done:
+    if(obj_id > 0) {
+        if(H5I_dec_app_ref(obj_id) < 0)
+            HDONE_ERROR(H5E_OHDR, H5E_CANTRELEASE, FAIL, "unable to close object")
+    } /* end if */
+    else if(loc_found && H5G_loc_free(&obj_loc) < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_CANTRELEASE, FAIL, "can't free location")
+    if(udata.visited)
+        H5SL_destroy(udata.visited, H5O_free_visit_visited, NULL);
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_visit() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_inc_rc
+ *
+ * Purpose:	Increments the reference count on an object header
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *		koziol@hdfgroup.org
+ *		Jul 13 2008
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_inc_rc(H5O_t *oh)
+{
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* check args */
+    HDassert(oh);
+
+    /* Pin the object header when the reference count goes above 0 */
+    if(oh->rc == 0)
+        if(H5AC_pin_protected_entry(oh) < 0)
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTPIN, FAIL, "unable to pin object header")
+
+    /* Increment reference count */
+    oh->rc++;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_inc_rc() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_dec_rc
+ *
+ * Purpose:	Decrements the reference count on an object header
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *		koziol@hdfgroup.org
+ *		Jul 13 2008
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_dec_rc(H5O_t *oh)
+{
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* check args */
+    HDassert(oh);
+
+    /* Decrement reference count */
+    oh->rc--;
+
+    /* Unpin the object header when the reference count goes back to 0 */
+    if(oh->rc == 0)
+        if(H5AC_unpin_entry(oh) < 0)
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPIN, FAIL, "unable to unpin object header")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_dec_rc() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:   H5O_dec_rc_by_loc
+ *
+ * Purpose:    Decrement the refcount of an object header, using its
+ *              object location information.
+ *
+ * Return:     Non-negative on success/Negative on failure
+ *
+ * Programmer: Quincey Koziol
+ *             koziol@hdfgroup.org
+ *             Oct 08 2010
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_dec_rc_by_loc(const H5O_loc_t *loc, hid_t dxpl_id)
+{
+    H5O_t       *oh = NULL;             /* Object header */
+    herr_t      ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* check args */
+    HDassert(loc);
+
+    /* Get header */
+    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
+       HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to protect object header")
+
+    /* Decrement the reference count on the object header */
+    /* (which will unpin it, if appropriate) */
+    if(H5O_dec_rc(oh) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTDEC, FAIL, "unable to decrement reference count on object header")
+
+done:
+    /* Release the object header from the cache */
+    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_dec_rc_by_loc() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_get_proxy
+ *
+ * Purpose:	Retrieve the proxy for the object header.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *		July 24 2016
+ *
+ *-------------------------------------------------------------------------
+ */
+H5AC_proxy_entry_t *
+H5O_get_proxy(const H5O_t *oh)
+{
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    /* Check args */
+    HDassert(oh);
+
+    FUNC_LEAVE_NOAPI(oh->proxy)
+} /* end H5O_get_proxy() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O__free
+ *
+ * Purpose:	Destroys an object header.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *		koziol@ncsa.uiuc.edu
+ *		Jan 15 2003
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O__free(H5O_t *oh)
+{
+    unsigned	u;                      /* Local index variable */
+    herr_t      ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    /* check args */
+    HDassert(oh);
+    HDassert(0 == oh->rc);
+
+    /* Destroy chunks */
+    if(oh->chunk) {
+        for(u = 0; u < oh->nchunks; u++)
+            oh->chunk[u].image = H5FL_BLK_FREE(chunk_image, oh->chunk[u].image);
+
+        oh->chunk = (H5O_chunk_t *)H5FL_SEQ_FREE(H5O_chunk_t, oh->chunk);
+    } /* end if */
+
+    /* Destroy messages */
+    if(oh->mesg) {
+        for(u = 0; u < oh->nmesgs; u++) {
+#ifndef NDEBUG
+            /* Verify that message is clean, unless it could have been marked
+             * dirty by decoding */
+            if(oh->ndecode_dirtied && oh->mesg[u].dirty)
+                oh->ndecode_dirtied--;
+            else
+                HDassert(oh->mesg[u].dirty == 0);
+#endif /* NDEBUG */
+
+            H5O_msg_free_mesg(&oh->mesg[u]);
+        } /* end for */
+
+        /* Make sure we accounted for all the messages dirtied by decoding */
+        HDassert(!oh->ndecode_dirtied);
+
+        oh->mesg = (H5O_mesg_t *)H5FL_SEQ_FREE(H5O_mesg_t, oh->mesg);
+    } /* end if */
+
+    /* Destroy the proxy */
+    if(oh->proxy)
+        if(H5AC_proxy_entry_dest(oh->proxy) < 0)
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTFREE, FAIL, "unable to destroy virtual entry used for proxy")
+
+    /* destroy object header */
+    oh = H5FL_FREE(H5O_t, oh);
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O__free() */
+
diff --git a/src/H5Oprivate.h b/src/H5Oprivate.h
index 563f8fa..e87c148 100644
--- a/src/H5Oprivate.h
+++ b/src/H5Oprivate.h
@@ -24,6 +24,9 @@
 #ifndef _H5Oprivate_H
 #define _H5Oprivate_H
 
+/* Early typedefs to avoid circular dependencies */
+typedef struct H5O_t H5O_t;
+
 /* Include the public header file for this API */
 #include "H5Opublic.h"          /* Object header functions              */
 
@@ -44,7 +47,6 @@
 /* Forward references of package typedefs */
 typedef struct H5O_msg_class_t H5O_msg_class_t;
 typedef struct H5O_mesg_t H5O_mesg_t;
-typedef struct H5O_t H5O_t;
 
 /* Values used to create the shared message & attribute heaps */
 /* (Note that these parameters have been tuned so that the resulting heap ID
@@ -881,6 +883,9 @@ H5_DLL void *H5O_obj_create(H5F_t *f, H5O_type_t obj_type, void *crt_info, H5G_l
 H5_DLL haddr_t H5O_get_oh_addr(const H5O_t *oh);
 H5_DLL herr_t H5O_get_rc_and_type(const H5O_loc_t *oloc, hid_t dxpl_id, unsigned *rc, H5O_type_t *otype);
 H5_DLL H5AC_proxy_entry_t *H5O_get_proxy(const H5O_t *oh);
+H5_DLL herr_t H5O_visit(hid_t loc_id, const char *obj_name, H5_index_t idx_type,
+    H5_iter_order_t order, H5O_iterate_t op, void *op_data, hid_t lapl_id,
+    hid_t dxpl_id);
 
 /* Object header message routines */
 H5_DLL herr_t H5O_msg_create(const H5O_loc_t *loc, unsigned type_id, unsigned mesg_flags,
diff --git a/src/H5PLint.c b/src/H5PLint.c
index c887f86..b190746 100644
--- a/src/H5PLint.c
+++ b/src/H5PLint.c
@@ -235,11 +235,11 @@ done:
  *-------------------------------------------------------------------------
  */
 const void *
-H5PL_load(H5PL_type_t type, int id)
+H5PL_load(H5PL_type_t type, H5PL_key_t key)
 {
-    H5PL_search_params_t    search_params;
+    H5PL_search_params_t    search_params;          /* Plugin search parameters     */
     hbool_t                 found = FALSE;          /* Whether the plugin was found */
-    const void             *plugin_info = NULL;
+    const void             *plugin_info = NULL;     /* Information from the plugin  */
     const void             *ret_value = NULL;
 
     FUNC_ENTER_NOAPI(NULL)
@@ -248,18 +248,17 @@ H5PL_load(H5PL_type_t type, int id)
     switch (type) {
         case H5PL_TYPE_FILTER:
             if ((H5PL_plugin_control_mask_g & H5PL_FILTER_PLUGIN) == 0)
-                HGOTO_ERROR(H5E_PLUGIN, H5E_CANTLOAD, NULL, "required dynamically loaded plugin filter '%d' is not available", id)
+                HGOTO_ERROR(H5E_PLUGIN, H5E_CANTLOAD, NULL, "filter plugins disabled")
             break;
-
         case H5PL_TYPE_ERROR:
         case H5PL_TYPE_NONE:
         default:
-            HGOTO_ERROR(H5E_PLUGIN, H5E_CANTLOAD, NULL, "required dynamically loaded plugin '%d' is not valid", id)
+            HGOTO_ERROR(H5E_PLUGIN, H5E_CANTLOAD, NULL, "Invalid plugin type specified")
     }
 
     /* Set up the search parameters */
     search_params.type = type;
-    search_params.id = id;
+    search_params.key.id = key.id;
 
     /* Search in the table of already loaded plugin libraries */
     if(H5PL__find_plugin_in_cache(&search_params, &found, &plugin_info) < 0)
@@ -304,11 +303,11 @@ done:
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wpedantic"
 herr_t
-H5PL__open(const char *path, H5PL_type_t type, int id, hbool_t *success, const void **plugin_info)
+H5PL__open(const char *path, H5PL_type_t type, H5PL_key_t key, hbool_t *success, const void **plugin_info)
 {
     H5PL_HANDLE             handle = NULL;
     H5PL_get_plugin_info_t  get_plugin_info = NULL;
-    htri_t                  ret_value = SUCCEED;
+    herr_t                  ret_value = SUCCEED;
 
     FUNC_ENTER_PACKAGE
 
@@ -326,35 +325,46 @@ H5PL__open(const char *path, H5PL_type_t type, int id, hbool_t *success, const v
      */
     if (NULL == (handle = H5PL_OPEN_DLIB(path))) {
         H5PL_CLR_ERROR; /* clear error */
-        HGOTO_DONE(SUCCEED);
+        HGOTO_DONE(SUCCEED)
     }
 
     /* Return a handle for the function H5PLget_plugin_info in the dynamic library.
      * The plugin library is suppose to define this function.
      */
-    if (NULL != (get_plugin_info = (H5PL_get_plugin_info_t)H5PL_GET_LIB_FUNC(handle, "H5PLget_plugin_info"))) {
-
-        const H5Z_class2_t *info;
+    if (NULL == (get_plugin_info = (H5PL_get_plugin_info_t)H5PL_GET_LIB_FUNC(handle, "H5PLget_plugin_info")))
+        HGOTO_DONE(SUCCEED)
 
-        /* Get the plugin info */
-        if (NULL == (info = (const H5Z_class2_t *)(*get_plugin_info)()))
-            HGOTO_ERROR(H5E_PLUGIN, H5E_CANTGET, FAIL, "can't get plugin info")
+    /* Get the plugin information */
+    switch (type) {
+        case H5PL_TYPE_FILTER:
+        {
+            const H5Z_class2_t *filter_info;
 
-        /* Check if the filter IDs match */
-        if (info->id == id) {
+            /* Get the plugin info */
+            if (NULL == (filter_info = (const H5Z_class2_t *)(*get_plugin_info)()))
+                HGOTO_ERROR(H5E_PLUGIN, H5E_CANTGET, FAIL, "can't get filter info from plugin")
 
-            /* Store the plugin in the cache */
-            if (H5PL__add_plugin(type, id, handle))
-                HGOTO_ERROR(H5E_PLUGIN, H5E_CANTINSERT, FAIL, "unable to add new plugin to plugin cache")
+            /* If the filter IDs match, we're done. Set the output parameters. */
+            if (filter_info->id == key.id) {
+                *plugin_info = (const void *)filter_info;
+                *success = TRUE;
+            }
 
-            /* Set output parameters */
-            *success = TRUE;
-            *plugin_info = (const void *)info;
+            break;
         }
-    }
+        case H5PL_TYPE_ERROR:
+        case H5PL_TYPE_NONE:
+        default:
+            HGOTO_ERROR(H5E_PLUGIN, H5E_CANTGET, FAIL, "Invalid plugin type specified")
+    } /* end switch */
+
+    /* If we found the correct plugin, store it in the cache */
+    if (*success)
+        if (H5PL__add_plugin(type, key, handle))
+            HGOTO_ERROR(H5E_PLUGIN, H5E_CANTINSERT, FAIL, "unable to add new plugin to plugin cache")
 
 done:
-    if (!success && handle)
+    if (!(*success) && handle)
         if (H5PL__close(handle) < 0)
             HDONE_ERROR(H5E_PLUGIN, H5E_CLOSEERROR, FAIL, "can't close dynamic library")
 
diff --git a/src/H5PLpath.c b/src/H5PLpath.c
index 435802a..972f1d0 100644
--- a/src/H5PLpath.c
+++ b/src/H5PLpath.c
@@ -689,7 +689,7 @@ H5PL__find_plugin_in_path(const H5PL_search_params_t *search_params, hbool_t *fo
                 continue;
 
             /* attempt to open the dynamic library as a filter library */
-            if (H5PL__open(path, search_params->type, search_params->id, found, plugin_info) < 0)
+            if (H5PL__open(path, search_params->type, search_params->key, found, plugin_info) < 0)
                 HGOTO_ERROR(H5E_PLUGIN, H5E_CANTGET, FAIL, "search in directory failed")
             if (*found)
                 HGOTO_DONE(SUCCEED)
@@ -755,7 +755,7 @@ H5PL__find_plugin_in_path(const H5PL_search_params_t *search_params, hbool_t *fo
                 continue;
 
             /* attempt to open the dynamic library as a filter library */
-            if (H5PL__open(path, search_params->type, search_params->id, found, plugin_info) < 0)
+            if (H5PL__open(path, search_params->type, search_params->key, found, plugin_info) < 0)
                 HGOTO_ERROR(H5E_PLUGIN, H5E_CANTGET, FAIL, "search in directory failed")
             if (*found)
                 HGOTO_DONE(SUCCEED)
diff --git a/src/H5PLpkg.h b/src/H5PLpkg.h
index 0d1c271..dfaa4af 100644
--- a/src/H5PLpkg.h
+++ b/src/H5PLpkg.h
@@ -115,8 +115,8 @@
 
 /* Data used to search for plugins */
 typedef struct H5PL_search_params_t {
-    H5PL_type_t     type;
-    int             id;
+    H5PL_type_t         type;
+    H5PL_key_t          key;
 } H5PL_search_params_t;
 
 
@@ -134,13 +134,13 @@ H5_DLL herr_t H5PL__get_plugin_control_mask(unsigned int *mask /*out*/);
 H5_DLL herr_t H5PL__set_plugin_control_mask(unsigned int mask);
 
 /* Plugin search and manipulation */
-H5_DLL herr_t H5PL__open(const char *libname, H5PL_type_t type, int id, hbool_t *success /*out*/, const void **plugin_info /*out*/);
+H5_DLL herr_t H5PL__open(const char *libname, H5PL_type_t type, H5PL_key_t key, hbool_t *success /*out*/, const void **plugin_info /*out*/);
 H5_DLL herr_t H5PL__close(H5PL_HANDLE handle);
 
 /* Plugin cache calls */
 H5_DLL herr_t H5PL__create_plugin_cache(void);
 H5_DLL herr_t H5PL__close_plugin_cache(hbool_t *already_closed /*out*/);
-H5_DLL herr_t H5PL__add_plugin(H5PL_type_t type, int id, H5PL_HANDLE handle);
+H5_DLL herr_t H5PL__add_plugin(H5PL_type_t type, H5PL_key_t key, H5PL_HANDLE handle);
 H5_DLL herr_t H5PL__find_plugin_in_cache(const H5PL_search_params_t *search_params, hbool_t *found /*out*/, const void **plugin_info /*out*/);
 
 /* Plugin search path calls */
diff --git a/src/H5PLplugin_cache.c b/src/H5PLplugin_cache.c
index e483e01..e905ac2 100644
--- a/src/H5PLplugin_cache.c
+++ b/src/H5PLplugin_cache.c
@@ -56,9 +56,9 @@
 
 /* Type for the list of info for opened plugin libraries */
 typedef struct H5PL_plugin_t {
-    H5PL_type_t     type;           /* Plugin type          */
-    int             id;             /* ID for the plugin    */
-    H5PL_HANDLE     handle;         /* Plugin handle        */
+    H5PL_type_t     type;           /* Plugin type                          */
+    H5PL_key_t      key;            /* Unique key to identify the plugin    */
+    H5PL_HANDLE     handle;         /* Plugin handle                        */
 } H5PL_plugin_t;
 
 
@@ -209,14 +209,14 @@ done:
 /*-------------------------------------------------------------------------
  * Function:    H5PL__add_plugin
  *
- * Purpose:     Add a plugin to the plugin cached.
+ * Purpose:     Add a plugin to the plugin cache.
  *
  * Return:      SUCCEED/FAIL
  *
  *-------------------------------------------------------------------------
  */
 herr_t
-H5PL__add_plugin(H5PL_type_t type, int id, H5PL_HANDLE handle)
+H5PL__add_plugin(H5PL_type_t type, H5PL_key_t key, H5PL_HANDLE handle)
 {
     herr_t      ret_value = SUCCEED;
 
@@ -229,7 +229,7 @@ H5PL__add_plugin(H5PL_type_t type, int id, H5PL_HANDLE handle)
 
     /* Store the plugin info and bump the # of plugins */
     H5PL_cache_g[H5PL_num_plugins_g].type       = type;
-    H5PL_cache_g[H5PL_num_plugins_g].id         = id;
+    H5PL_cache_g[H5PL_num_plugins_g].key        = key;
     H5PL_cache_g[H5PL_num_plugins_g].handle     = handle;
 
     H5PL_num_plugins_g++;
@@ -276,7 +276,7 @@ H5PL__find_plugin_in_cache(const H5PL_search_params_t *search_params, hbool_t *f
     for (u = 0; u < H5PL_num_plugins_g; u++) {
 
         /* If the plugin type (filter, etc.) and ID match, query the plugin for its info */
-        if ((search_params->type == (H5PL_cache_g[u]).type) && (search_params->id == (H5PL_cache_g[u]).id)) {
+        if ((search_params->type == (H5PL_cache_g[u]).type) && (search_params->key.id == (H5PL_cache_g[u]).key.id)) {
 
             H5PL_get_plugin_info_t      get_plugin_info_function;
             const H5Z_class2_t          *filter_info;
diff --git a/src/H5PLprivate.h b/src/H5PLprivate.h
index bc12e64..cc2e258 100644
--- a/src/H5PLprivate.h
+++ b/src/H5PLprivate.h
@@ -33,6 +33,11 @@
 /* Library Private Typedefs */
 /****************************/
 
+/* The key that will be used to find the plugin */
+typedef union H5PL_key_t {
+    int         id;         /* filters      */
+} H5PL_key_t;
+
 
 /*****************************/
 /* Library-private Variables */
@@ -44,7 +49,7 @@
 /***************************************/
 
 /* Internal API routines */
-H5_DLL const void *H5PL_load(H5PL_type_t plugin_type, int type_id);
+H5_DLL const void *H5PL_load(H5PL_type_t plugin_type, H5PL_key_t key);
 
 #endif /* _H5PLprivate_H */
 
diff --git a/src/H5PLpublic.h b/src/H5PLpublic.h
index 3b36ccd..fe5bdfb 100644
--- a/src/H5PLpublic.h
+++ b/src/H5PLpublic.h
@@ -30,9 +30,9 @@
 
 /* Plugin type used by the plugin library */
 typedef enum H5PL_type_t {
-    H5PL_TYPE_ERROR         = -1,   /* Error                    */
-    H5PL_TYPE_FILTER        = 0,    /* Filter                   */
-    H5PL_TYPE_NONE          = 1     /* This must be last!       */
+    H5PL_TYPE_ERROR         = -1,   /* Error                */
+    H5PL_TYPE_FILTER        =  0,   /* Filter               */
+    H5PL_TYPE_NONE          =  1    /* This must be last!   */
 } H5PL_type_t;
 
 /* Common dynamic plugin type flags used by the set/get_loading_state functions */
diff --git a/src/H5R.c b/src/H5R.c
index b965632..0409f33 100644
--- a/src/H5R.c
+++ b/src/H5R.c
@@ -21,16 +21,13 @@
 /***********/
 /* Headers */
 /***********/
-#include "H5private.h"		/* Generic Functions			*/
-#include "H5ACprivate.h"        /* Metadata cache                       */
-#include "H5Dprivate.h"		/* Datasets				*/
-#include "H5Eprivate.h"		/* Error handling		  	*/
-#include "H5Gprivate.h"		/* Groups				*/
-#include "H5HGprivate.h"	/* Global Heaps				*/
-#include "H5Iprivate.h"		/* IDs			  		*/
-#include "H5MMprivate.h"	/* Memory management			*/
-#include "H5Rpkg.h"		/* References				*/
-#include "H5Sprivate.h"		/* Dataspaces 				*/
+#include "H5private.h"          /* Generic Functions                        */
+#include "H5ACprivate.h"        /* Metadata cache                           */
+#include "H5Eprivate.h"         /* Error handling                           */
+#include "H5Gprivate.h"         /* Groups                                   */
+#include "H5Iprivate.h"         /* IDs                                      */
+#include "H5Rpkg.h"             /* References                               */
+#include "H5Sprivate.h"         /* Dataspaces                               */
 
 
 /****************/
@@ -47,20 +44,11 @@
 /* Local Prototypes */
 /********************/
 
-static herr_t H5R_create(void *ref, H5G_loc_t *loc, const char *name,
-        H5R_type_t ref_type, H5S_t *space, hid_t dxpl_id);
-static H5S_t * H5R_get_region(H5F_t *file, hid_t dxpl_id, const void *_ref);
-static ssize_t H5R_get_name(H5F_t *file, hid_t lapl_id, hid_t dxpl_id, hid_t id,
-    H5R_type_t ref_type, const void *_ref, char *name, size_t size);
-
 
 /*********************/
 /* Package Variables */
 /*********************/
 
-/* Package initialization variable */
-hbool_t H5_PKG_INIT_VAR = FALSE;
-
 
 /*****************************/
 /* Library Private Variables */
@@ -71,275 +59,6 @@ hbool_t H5_PKG_INIT_VAR = FALSE;
 /* Local Variables */
 /*******************/
 
-/* Reference ID class */
-static const H5I_class_t H5I_REFERENCE_CLS[1] = {{
-    H5I_REFERENCE,		/* ID class value */
-    0,				/* Class flags */
-    0,				/* # of reserved IDs for class */
-    NULL			/* Callback routine for closing objects of this class */
-}};
-
-/* Flag indicating "top" of interface has been initialized */
-static hbool_t H5R_top_package_initialize_s = FALSE;
-
-
-
-/*--------------------------------------------------------------------------
-NAME
-   H5R__init_package -- Initialize interface-specific information
-USAGE
-    herr_t H5R__init_package()
-
-RETURNS
-    Non-negative on success/Negative on failure
-DESCRIPTION
-    Initializes any interface-specific data or routines.
-
---------------------------------------------------------------------------*/
-herr_t
-H5R__init_package(void)
-{
-    herr_t ret_value = SUCCEED;         /* Return value */
-
-    FUNC_ENTER_NOAPI_NOINIT
-
-    /* Initialize the atom group for the file IDs */
-    if(H5I_register_type(H5I_REFERENCE_CLS) < 0)
-        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, FAIL, "unable to initialize interface")
-
-    /* Mark "top" of interface as initialized, too */
-    H5R_top_package_initialize_s = TRUE;
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5R__init_package() */
-
-
-/*--------------------------------------------------------------------------
- NAME
-    H5R_top_term_package
- PURPOSE
-    Terminate various H5R objects
- USAGE
-    void H5R_top_term_package()
- RETURNS
-    void
- DESCRIPTION
-    Release IDs for the atom group, deferring full interface shutdown
-    until later (in H5R_term_package).
- GLOBAL VARIABLES
- COMMENTS, BUGS, ASSUMPTIONS
-     Can't report errors...
- EXAMPLES
- REVISION LOG
---------------------------------------------------------------------------*/
-int
-H5R_top_term_package(void)
-{
-    int	n = 0;
-
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
-
-    if(H5R_top_package_initialize_s) {
-        if(H5I_nmembers(H5I_REFERENCE) > 0) {
-            (void)H5I_clear_type(H5I_REFERENCE, FALSE, FALSE);
-            n++; /*H5I*/
-	    } /* end if */
-
-        /* Mark closed */
-        if(0 == n)
-            H5R_top_package_initialize_s = FALSE;
-    } /* end if */
-
-    FUNC_LEAVE_NOAPI(n)
-} /* end H5R_top_term_package() */
-
-
-/*--------------------------------------------------------------------------
- NAME
-    H5R_term_package
- PURPOSE
-    Terminate various H5R objects
- USAGE
-    void H5R_term_package()
- RETURNS
-    void
- DESCRIPTION
-    Release the atom group and any other resources allocated.
- GLOBAL VARIABLES
- COMMENTS, BUGS, ASSUMPTIONS
-     Can't report errors...
-
-     Finishes shutting down the interface, after H5R_top_term_package()
-     is called
- EXAMPLES
- REVISION LOG
---------------------------------------------------------------------------*/
-int
-H5R_term_package(void)
-{
-    int	n = 0;
-
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
-
-    if(H5_PKG_INIT_VAR) {
-        /* Sanity checks */
-        HDassert(0 == H5I_nmembers(H5I_REFERENCE));
-        HDassert(FALSE == H5R_top_package_initialize_s);
-
-        /* Destroy the reference id group */
-        n += (H5I_dec_type_ref(H5I_REFERENCE) > 0);
-
-        /* Mark closed */
-        if(0 == n)
-            H5_PKG_INIT_VAR = FALSE;
-    } /* end if */
-
-    FUNC_LEAVE_NOAPI(n)
-} /* end H5R_term_package() */
-
-
-/*--------------------------------------------------------------------------
- NAME
-    H5R_create
- PURPOSE
-    Creates a particular kind of reference for the user
- USAGE
-    herr_t H5R_create(ref, loc, name, ref_type, space)
-        void *ref;          OUT: Reference created
-        H5G_loc_t *loc;     IN: File location used to locate object pointed to
-        const char *name;   IN: Name of object at location LOC_ID of object
-                                    pointed to
-        H5R_type_t ref_type;    IN: Type of reference to create
-        H5S_t *space;       IN: Dataspace ID with selection, used for Dataset
-                                    Region references.
-
- RETURNS
-    Non-negative on success/Negative on failure
- DESCRIPTION
-    Creates a particular type of reference specified with REF_TYPE, in the
-    space pointed to by REF.  The LOC_ID and NAME are used to locate the object
-    pointed to and the SPACE_ID is used to choose the region pointed to (for
-    Dataset Region references).
- GLOBAL VARIABLES
- COMMENTS, BUGS, ASSUMPTIONS
- EXAMPLES
- REVISION LOG
---------------------------------------------------------------------------*/
-static herr_t
-H5R_create(void *_ref, H5G_loc_t *loc, const char *name, H5R_type_t ref_type, H5S_t *space, hid_t dxpl_id)
-{
-    H5G_loc_t   obj_loc;                /* Group hier. location of object */
-    H5G_name_t  path;                   /* Object group hier. path */
-    H5O_loc_t   oloc;                   /* Object object location */
-    hbool_t     obj_found = FALSE;      /* Object location found */
-    herr_t      ret_value = SUCCEED;    /* Return value */
-
-    FUNC_ENTER_NOAPI_NOINIT
-
-    HDassert(_ref);
-    HDassert(loc);
-    HDassert(name);
-    HDassert(ref_type > H5R_BADTYPE && ref_type < H5R_MAXTYPE);
-
-    /* Set up object location to fill in */
-    obj_loc.oloc = &oloc;
-    obj_loc.path = &path;
-    H5G_loc_reset(&obj_loc);
-
-    /* Find the object */
-    if(H5G_loc_find(loc, name, &obj_loc, H5P_DEFAULT, dxpl_id) < 0)
-        HGOTO_ERROR(H5E_REFERENCE, H5E_NOTFOUND, FAIL, "object not found")
-    obj_found = TRUE;
-
-    switch(ref_type) {
-        case H5R_OBJECT:
-        {
-            hobj_ref_t *ref = (hobj_ref_t *)_ref; /* Get pointer to correct type of reference struct */
-
-            *ref = obj_loc.oloc->addr;
-            break;
-        }
-
-        case H5R_DATASET_REGION:
-        {
-            H5HG_t hobjid;      /* Heap object ID */
-            hdset_reg_ref_t *ref = (hdset_reg_ref_t *)_ref; /* Get pointer to correct type of reference struct */
-            hssize_t buf_size;  /* Size of buffer needed to serialize selection */
-            uint8_t *p;       /* Pointer to OID to store */
-            uint8_t *buf;     /* Buffer to store serialized selection in */
-            unsigned heapid_found;  /* Flag for non-zero heap ID found */
-            unsigned u;        /* local index */
-
-            /* Set up information for dataset region */
-
-            /* Return any previous heap block to the free list if we are garbage collecting */
-            if(H5F_GC_REF(loc->oloc->file)) {
-                /* Check for an existing heap ID in the reference */
-                for(u = 0, heapid_found = 0, p = (uint8_t *)ref; u < H5R_DSET_REG_REF_BUF_SIZE; u++)
-                    if(p[u] != 0) {
-                        heapid_found = 1;
-                        break;
-                    } /* end if */
-
-                if(heapid_found != 0) {
-/* Return heap block to free list */
-                } /* end if */
-            } /* end if */
-
-            /* Zero the heap ID out, may leak heap space if user is re-using reference and doesn't have garbage collection on */
-            HDmemset(ref, 0, H5R_DSET_REG_REF_BUF_SIZE);
-
-            /* Get the amount of space required to serialize the selection */
-            if((buf_size = H5S_SELECT_SERIAL_SIZE(space, loc->oloc->file)) < 0)
-                HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, FAIL, "Invalid amount of space for serializing selection")
-
-            /* Increase buffer size to allow for the dataset OID */
-            buf_size += (hssize_t)sizeof(haddr_t);
-
-            /* Allocate the space to store the serialized information */
-            H5_CHECK_OVERFLOW(buf_size, hssize_t, size_t);
-            if(NULL == (buf = (uint8_t *)H5MM_malloc((size_t)buf_size)))
-                HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
-
-            /* Serialize information for dataset OID into heap buffer */
-            p = (uint8_t *)buf;
-            H5F_addr_encode(loc->oloc->file, &p, obj_loc.oloc->addr);
-
-            /* Serialize the selection into heap buffer */
-            if(H5S_SELECT_SERIALIZE(space, &p, loc->oloc->file) < 0)
-                HGOTO_ERROR(H5E_REFERENCE, H5E_CANTCOPY, FAIL, "Unable to serialize selection")
-
-            /* Save the serialized buffer for later */
-            H5_CHECK_OVERFLOW(buf_size, hssize_t, size_t);
-            if(H5HG_insert(loc->oloc->file, dxpl_id, (size_t)buf_size, buf, &hobjid) < 0)
-                HGOTO_ERROR(H5E_REFERENCE, H5E_WRITEERROR, FAIL, "Unable to serialize selection")
-
-            /* Serialize the heap ID and index for storage in the file */
-            p = (uint8_t *)ref;
-            H5F_addr_encode(loc->oloc->file, &p, hobjid.addr);
-            UINT32ENCODE(p, hobjid.idx);
-
-            /* Free the buffer we serialized data in */
-            H5MM_xfree(buf);
-            break;
-        }
-
-        case H5R_BADTYPE:
-        case H5R_MAXTYPE:
-        default:
-            HDassert("unknown reference type" && 0);
-            HGOTO_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL, "internal error (unknown reference type)")
-    } /* end switch */
-
-done:
-    if(obj_found)
-        H5G_loc_free(&obj_loc);
-
-    FUNC_LEAVE_NOAPI(ret_value)
-}   /* end H5R_create() */
-
-
 /*--------------------------------------------------------------------------
  NAME
     H5Rcreate
@@ -378,23 +97,23 @@ H5Rcreate(void *ref, hid_t loc_id, const char *name, H5R_type_t ref_type, hid_t
     H5TRACE5("e", "*xi*sRti", ref, loc_id, name, ref_type, space_id);
 
     /* Check args */
-    if(ref == NULL)
+    if (ref == NULL)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference pointer")
-    if(H5G_loc(loc_id, &loc) < 0)
+    if (H5G_loc(loc_id, &loc) < 0)
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
-    if(!name || !*name)
+    if (!name || !*name)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name given")
-    if(ref_type <= H5R_BADTYPE || ref_type >= H5R_MAXTYPE)
+    if (ref_type <= H5R_BADTYPE || ref_type >= H5R_MAXTYPE)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference type")
-    if(ref_type != H5R_OBJECT && ref_type != H5R_DATASET_REGION)
+    if (ref_type != H5R_OBJECT && ref_type != H5R_DATASET_REGION)
         HGOTO_ERROR(H5E_ARGS, H5E_UNSUPPORTED, FAIL, "reference type not supported")
-    if(space_id == (-1) && ref_type == H5R_DATASET_REGION)
+    if (space_id == (-1) && ref_type == H5R_DATASET_REGION)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "reference region dataspace id must be valid")
-    if(space_id != (-1) && (NULL == (space = (H5S_t *)H5I_object_verify(space_id, H5I_DATASPACE))))
+    if (space_id != (-1) && (NULL == (space = (H5S_t *)H5I_object_verify(space_id, H5I_DATASPACE))))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataspace")
 
     /* Create reference */
-    if((ret_value = H5R_create(ref, &loc, name, ref_type, space, H5AC_ind_read_dxpl_id)) < 0)
+    if ((ret_value = H5R_create(ref, &loc, name, ref_type, space, H5AC_ind_read_dxpl_id)) < 0)
         HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, FAIL, "unable to create reference")
 
 done:
@@ -404,166 +123,6 @@ done:
 
 /*--------------------------------------------------------------------------
  NAME
-    H5R_dereference
- PURPOSE
-    Opens the HDF5 object referenced.
- USAGE
-    hid_t H5R_dereference(ref)
-        H5F_t *file;        IN: File the object being dereferenced is within
-        H5R_type_t ref_type;    IN: Type of reference
-        void *ref;          IN: Reference to open.
-
- RETURNS
-    Valid ID on success, Negative on failure
- DESCRIPTION
-    Given a reference to some object, open that object and return an ID for
-    that object.
- GLOBAL VARIABLES
- COMMENTS, BUGS, ASSUMPTIONS
-    Currently only set up to work with references to datasets
- EXAMPLES
- REVISION LOG
-    Raymond Lu
-    13 July 2011
-    I added the OAPL_ID parameter for the object being referenced.  It only
-    supports dataset access property list currently.
-
-    M. Scot Breitenfeld
-    3 March 2015
-    Added a check for undefined reference pointer.
---------------------------------------------------------------------------*/
-hid_t
-H5R_dereference(H5F_t *file, hid_t oapl_id, hid_t dxpl_id, H5R_type_t ref_type, const void *_ref, hbool_t app_ref)
-{
-    H5O_loc_t oloc;             /* Object location */
-    H5G_name_t path;            /* Path of object */
-    H5G_loc_t loc;              /* Group location */
-    unsigned rc;		/* Reference count of object */
-    H5O_type_t obj_type;        /* Type of object */
-    hid_t ret_value = H5I_INVALID_HID;  /* Return value */
-
-    FUNC_ENTER_NOAPI_NOINIT
-
-    HDassert(_ref);
-    HDassert(ref_type > H5R_BADTYPE && ref_type < H5R_MAXTYPE);
-    HDassert(file);
-
-    /* Initialize the object location */
-    H5O_loc_reset(&oloc);
-    oloc.file = file;
-
-    switch(ref_type) {
-        case H5R_OBJECT:
-            oloc.addr = *(const hobj_ref_t *)_ref; /* Only object references currently supported */
-	    if(!H5F_addr_defined(oloc.addr) || oloc.addr == 0)
-	      HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "Undefined reference pointer")
-	      break;
-            
-        case H5R_DATASET_REGION:
-        {
-            H5HG_t hobjid;  /* Heap object ID */
-            uint8_t *buf;   /* Buffer to store serialized selection in */
-            const uint8_t *p;           /* Pointer to OID to store */
-
-            /* Get the heap ID for the dataset region */
-            p = (const uint8_t *)_ref;
-            H5F_addr_decode(oloc.file, &p, &(hobjid.addr));
-            UINT32DECODE(p, hobjid.idx);
-
-            if(!H5F_addr_defined(hobjid.addr) || hobjid.addr == 0)
-	      HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "Undefined reference pointer")
-
-            /* Get the dataset region from the heap (allocate inside routine) */
-            if(NULL == (buf = (uint8_t *)H5HG_read(oloc.file, dxpl_id, &hobjid, NULL, NULL)))
-                HGOTO_ERROR(H5E_REFERENCE, H5E_READERROR, FAIL, "Unable to read dataset region information")
-
-            /* Get the object oid for the dataset */
-            p = buf;
-            H5F_addr_decode(oloc.file, &p, &(oloc.addr));
-
-            /* Free the buffer allocated in H5HG_read() */
-            H5MM_xfree(buf);
-        } /* end case */
-        break;
-
-        case H5R_BADTYPE:
-        case H5R_MAXTYPE:
-        default:
-            HDassert("unknown reference type" && 0);
-            HGOTO_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL, "internal error (unknown reference type)")
-    } /* end switch */
-
-    /* Get the # of links for object, and its type */
-    /* (To check to make certain that this object hasn't been deleted since the reference was created) */
-    if(H5O_get_rc_and_type(&oloc, dxpl_id, &rc, &obj_type) < 0 || 0 == rc)
-        HGOTO_ERROR(H5E_REFERENCE, H5E_LINKCOUNT, FAIL, "dereferencing deleted object")
-
-    /* Construct a group location for opening the object */
-    H5G_name_reset(&path);
-    loc.oloc = &oloc;
-    loc.path = &path;
-
-    /* Open the object */
-    switch(obj_type) {
-        case H5O_TYPE_GROUP:
-            {
-                H5G_t *group;               /* Pointer to group to open */
-
-                if(NULL == (group = H5G_open(&loc, dxpl_id)))
-                    HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "not found")
-
-                /* Create an atom for the group */
-                if((ret_value = H5I_register(H5I_GROUP, group, app_ref)) < 0) {
-                    H5G_close(group);
-                    HGOTO_ERROR(H5E_SYM, H5E_CANTREGISTER, FAIL, "can't register group")
-                } /* end if */
-            } /* end case */
-            break;
-
-        case H5O_TYPE_NAMED_DATATYPE:
-            {
-                H5T_t *type;                /* Pointer to datatype to open */
-
-                if(NULL == (type = H5T_open(&loc, dxpl_id)))
-                    HGOTO_ERROR(H5E_DATATYPE, H5E_NOTFOUND, FAIL, "not found")
-
-                /* Create an atom for the datatype */
-                if((ret_value = H5I_register(H5I_DATATYPE, type, app_ref)) < 0) {
-                    H5T_close(type);
-                    HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, FAIL, "can't register datatype")
-                } /* end if */
-            } /* end case */
-            break;
-
-        case H5O_TYPE_DATASET:
-            {
-                H5D_t *dset;                /* Pointer to dataset to open */
-
-                /* Open the dataset */
-                if(NULL == (dset = H5D_open(&loc, oapl_id, dxpl_id)))
-                    HGOTO_ERROR(H5E_DATASET, H5E_NOTFOUND, FAIL, "not found")
-
-                /* Create an atom for the dataset */
-                if((ret_value = H5I_register(H5I_DATASET, dset, app_ref)) < 0) {
-                    H5D_close(dset);
-                    HGOTO_ERROR(H5E_DATASET, H5E_CANTREGISTER, FAIL, "can't register dataset")
-                } /* end if */
-            } /* end case */
-            break;
-
-        case H5O_TYPE_UNKNOWN:
-        case H5O_TYPE_NTYPES:
-        default:
-            HGOTO_ERROR(H5E_REFERENCE, H5E_BADTYPE, FAIL, "can't identify type of object referenced")
-     } /* end switch */
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-}   /* end H5R_dereference() */
-
-
-/*--------------------------------------------------------------------------
- NAME
     H5Rdereference2
  PURPOSE
     Opens the HDF5 object referenced.
@@ -601,24 +160,24 @@ H5Rdereference2(hid_t obj_id, hid_t oapl_id, H5R_type_t ref_type, const void *_r
     H5TRACE4("i", "iiRt*x", obj_id, oapl_id, ref_type, _ref);
 
     /* Check args */
-    if(H5G_loc(obj_id, &loc) < 0)
+    if (H5G_loc(obj_id, &loc) < 0)
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
-    if(oapl_id < 0)
+    if (oapl_id < 0)
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a property list")
-    if(ref_type <= H5R_BADTYPE || ref_type >= H5R_MAXTYPE)
+    if (ref_type <= H5R_BADTYPE || ref_type >= H5R_MAXTYPE)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference type")
-    if(_ref == NULL)
+    if (_ref == NULL)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference pointer")
 
     /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&oapl_id, H5P_CLS_DACC, &dxpl_id, obj_id, FALSE) < 0)
+    if (H5P_verify_apl_and_dxpl(&oapl_id, H5P_CLS_DACC, &dxpl_id, obj_id, FALSE) < 0)
         HGOTO_ERROR(H5E_REFERENCE, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
 
     /* Get the file pointer from the entry */
     file = loc.oloc->file;
 
     /* Create reference */
-    if((ret_value = H5R_dereference(file, oapl_id, dxpl_id, ref_type, _ref, TRUE)) < 0)
+    if ((ret_value = H5R_dereference(file, oapl_id, dxpl_id, ref_type, _ref, TRUE)) < 0)
         HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, FAIL, "unable to dereference object")
 
 done:
@@ -628,75 +187,6 @@ done:
 
 /*--------------------------------------------------------------------------
  NAME
-    H5R_get_region
- PURPOSE
-    Retrieves a dataspace with the region pointed to selected.
- USAGE
-    H5S_t *H5R_get_region(file, ref_type, ref)
-        H5F_t *file;        IN: File the object being dereferenced is within
-        void *ref;          IN: Reference to open.
-
- RETURNS
-    Pointer to the dataspace on success, NULL on failure
- DESCRIPTION
-    Given a reference to some object, creates a copy of the dataset pointed
-    to's dataspace and defines a selection in the copy which is the region
-    pointed to.
- GLOBAL VARIABLES
- COMMENTS, BUGS, ASSUMPTIONS
- EXAMPLES
- REVISION LOG
---------------------------------------------------------------------------*/
-static H5S_t *
-H5R_get_region(H5F_t *file, hid_t dxpl_id, const void *_ref)
-{
-    H5O_loc_t oloc;             /* Object location */
-    const uint8_t *p;           /* Pointer to OID to store */
-    H5HG_t hobjid;              /* Heap object ID */
-    uint8_t *buf = NULL;        /* Buffer to store serialized selection in */
-    H5S_t *ret_value;
-
-    FUNC_ENTER_NOAPI_NOINIT
-
-    HDassert(_ref);
-    HDassert(file);
-
-    /* Initialize the object location */
-    H5O_loc_reset(&oloc);
-    oloc.file = file;
-
-    /* Get the heap ID for the dataset region */
-    p = (const uint8_t *)_ref;
-    H5F_addr_decode(oloc.file, &p, &(hobjid.addr));
-    UINT32DECODE(p, hobjid.idx);
-
-    /* Get the dataset region from the heap (allocate inside routine) */
-    if((buf = (uint8_t *)H5HG_read(oloc.file, dxpl_id, &hobjid, NULL, NULL)) == NULL)
-        HGOTO_ERROR(H5E_REFERENCE, H5E_READERROR, NULL, "Unable to read dataset region information")
-
-    /* Get the object oid for the dataset */
-    p = buf;
-    H5F_addr_decode(oloc.file, &p, &(oloc.addr));
-
-    /* Open and copy the dataset's dataspace */
-    if((ret_value = H5S_read(&oloc, dxpl_id)) == NULL)
-        HGOTO_ERROR(H5E_DATASPACE, H5E_NOTFOUND, NULL, "not found")
-
-    /* Unserialize the selection */
-    if(H5S_SELECT_DESERIALIZE(&ret_value, &p) < 0)
-        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTDECODE, NULL, "can't deserialize selection")
-
-done:
-    /* Free the buffer allocated in H5HG_read() */
-    if(buf)
-        H5MM_xfree(buf);
-
-    FUNC_LEAVE_NOAPI(ret_value)
-}   /* end H5R_get_region() */
-
-
-/*--------------------------------------------------------------------------
- NAME
     H5Rget_region
  PURPOSE
     Retrieves a dataspace with the region pointed to selected.
@@ -729,19 +219,19 @@ H5Rget_region(hid_t id, H5R_type_t ref_type, const void *ref)
     H5TRACE3("i", "iRt*x", id, ref_type, ref);
 
     /* Check args */
-    if(H5G_loc(id, &loc) < 0)
+    if (H5G_loc(id, &loc) < 0)
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
-    if(ref_type != H5R_DATASET_REGION)
+    if (ref_type != H5R_DATASET_REGION)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference type")
-    if(ref == NULL)
+    if (ref == NULL)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference pointer")
 
     /* Get the dataspace with the correct region selected */
-    if((space = H5R_get_region(loc.oloc->file, H5AC_ind_read_dxpl_id, ref)) == NULL)
+    if ((space = H5R_get_region(loc.oloc->file, H5AC_ind_read_dxpl_id, ref)) == NULL)
         HGOTO_ERROR(H5E_REFERENCE, H5E_CANTCREATE, FAIL, "unable to create dataspace")
 
     /* Atomize */
-    if((ret_value = H5I_register(H5I_DATASPACE, space, TRUE)) < 0)
+    if ((ret_value = H5I_register(H5I_DATASPACE, space, TRUE)) < 0)
         HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register dataspace atom")
 
 done:
@@ -751,92 +241,6 @@ done:
 
 /*--------------------------------------------------------------------------
  NAME
-    H5R_get_obj_type
- PURPOSE
-    Retrieves the type of object that an object reference points to
- USAGE
-    H5O_type_t H5R_get_obj_type(file, ref_type, ref)
-        H5F_t *file;        IN: File the object being dereferenced is within
-        H5R_type_t ref_type;    IN: Type of reference to query
-        void *ref;          IN: Reference to query.
-
- RETURNS
-    Success:	An object type defined in H5Gpublic.h
-    Failure:	H5G_UNKNOWN
- DESCRIPTION
-    Given a reference to some object, this function returns the type of object
-    pointed to.
- GLOBAL VARIABLES
- COMMENTS, BUGS, ASSUMPTIONS
- EXAMPLES
- REVISION LOG
---------------------------------------------------------------------------*/
-herr_t
-H5R_get_obj_type(H5F_t *file, hid_t dxpl_id, H5R_type_t ref_type,
-    const void *_ref, H5O_type_t *obj_type)
-{
-    H5O_loc_t oloc;             /* Object location */
-    unsigned rc;		/* Reference count of object    */
-    herr_t ret_value = SUCCEED; /* Return value */
-
-    FUNC_ENTER_NOAPI_NOINIT
-
-    HDassert(file);
-    HDassert(_ref);
-
-    /* Initialize the symbol table entry */
-    H5O_loc_reset(&oloc);
-    oloc.file = file;
-
-    switch(ref_type) {
-        case H5R_OBJECT:
-            /* Get the object oid */
-            oloc.addr = *(const hobj_ref_t *)_ref; /* Only object references currently supported */
-            break;
-
-        case H5R_DATASET_REGION:
-        {
-            H5HG_t hobjid;      /* Heap object ID */
-            const uint8_t *p;   /* Pointer to reference to decode */
-            uint8_t *buf;       /* Buffer to store serialized selection in */
-
-            /* Get the heap ID for the dataset region */
-            p = (const uint8_t *)_ref;
-            H5F_addr_decode(oloc.file, &p, &(hobjid.addr));
-            UINT32DECODE(p, hobjid.idx);
-
-            /* Get the dataset region from the heap (allocate inside routine) */
-            if((buf = (uint8_t *)H5HG_read(oloc.file, dxpl_id, &hobjid, NULL, NULL)) == NULL)
-                HGOTO_ERROR(H5E_REFERENCE, H5E_READERROR, FAIL, "Unable to read dataset region information")
-
-            /* Get the object oid for the dataset */
-            p = buf;
-            H5F_addr_decode(oloc.file, &p, &(oloc.addr));
-
-            /* Free the buffer allocated in H5HG_read() */
-            H5MM_xfree(buf);
-        } /* end case */
-        break;
-
-        case H5R_BADTYPE:
-        case H5R_MAXTYPE:
-        default:
-            HDassert("unknown reference type" && 0);
-            HGOTO_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL, "internal error (unknown reference type)")
-    } /* end switch */
-
-    /* Get the # of links for object, and its type */
-    /* (To check to make certain that this object hasn't been deleted since the reference was created) */
-    if(H5O_get_rc_and_type(&oloc, dxpl_id, &rc, obj_type) < 0 || 0 == rc)
-        HGOTO_ERROR(H5E_REFERENCE, H5E_LINKCOUNT, FAIL, "dereferencing deleted object")
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-}   /* end H5R_get_obj_type() */
-
-
-/*--------------------------------------------------------------------------
- NAME
     H5Rget_obj_type2
  PURPOSE
     Retrieves the type of object that an object reference points to
@@ -869,16 +273,16 @@ H5Rget_obj_type2(hid_t id, H5R_type_t ref_type, const void *ref,
     H5TRACE4("e", "iRt*x*Ot", id, ref_type, ref, obj_type);
 
     /* Check args */
-    if(H5G_loc(id, &loc) < 0)
+    if (H5G_loc(id, &loc) < 0)
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
-    if(ref_type <= H5R_BADTYPE || ref_type >= H5R_MAXTYPE)
+    if (ref_type <= H5R_BADTYPE || ref_type >= H5R_MAXTYPE)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference type")
-    if(ref == NULL)
+    if (ref == NULL)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference pointer")
 
     /* Get the object information */
-    if(H5R_get_obj_type(loc.oloc->file, H5AC_ind_read_dxpl_id, ref_type, ref, obj_type) < 0)
-	HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, FAIL, "unable to determine object type")
+    if (H5R_get_obj_type(loc.oloc->file, H5AC_ind_read_dxpl_id, ref_type, ref, obj_type) < 0)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, FAIL, "unable to determine object type")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -887,106 +291,6 @@ done:
 
 /*--------------------------------------------------------------------------
  NAME
-    H5R_get_name
- PURPOSE
-    Internal routine to determine a name for the object referenced
- USAGE
-    ssize_t H5R_get_name(f, dxpl_id, ref_type, ref, name, size)
-        H5F_t *f;       IN: Pointer to the file that the reference is pointing
-                            into
-        hid_t lapl_id;  IN: LAPL to use for operation
-        hid_t dxpl_id;  IN: DXPL to use for operation
-        hid_t id;       IN: Location ID given for reference
-        H5R_type_t ref_type;    IN: Type of reference
-        void *ref;      IN: Reference to query.
-        char *name;     OUT: Buffer to place name of object referenced
-        size_t size;    IN: Size of name buffer
-
- RETURNS
-    Non-negative length of the path on success, Negative on failure
- DESCRIPTION
-    Given a reference to some object, determine a path to the object
-    referenced in the file.
- GLOBAL VARIABLES
- COMMENTS, BUGS, ASSUMPTIONS
-    This may not be the only path to that object.
- EXAMPLES
- REVISION LOG
---------------------------------------------------------------------------*/
-static ssize_t
-H5R_get_name(H5F_t *f, hid_t lapl_id, hid_t dxpl_id, hid_t id, H5R_type_t ref_type,
-    const void *_ref, char *name, size_t size)
-{
-    hid_t file_id = H5I_INVALID_HID;    /* ID for file that the reference is in */
-    H5O_loc_t oloc;             /* Object location describing object for reference */
-    ssize_t ret_value = -1;     /* Return value */
-
-    FUNC_ENTER_NOAPI_NOINIT
-
-    /* Check args */
-    HDassert(f);
-    HDassert(_ref);
-
-    /* Initialize the object location */
-    H5O_loc_reset(&oloc);
-    oloc.file = f;
-
-    /* Get address for reference */
-    switch(ref_type) {
-        case H5R_OBJECT:
-            oloc.addr = *(const hobj_ref_t *)_ref;
-            break;
-
-        case H5R_DATASET_REGION:
-        {
-            H5HG_t hobjid;  /* Heap object ID */
-            uint8_t *buf;   /* Buffer to store serialized selection in */
-            const uint8_t *p;           /* Pointer to OID to store */
-
-            /* Get the heap ID for the dataset region */
-            p = (const uint8_t *)_ref;
-            H5F_addr_decode(oloc.file, &p, &(hobjid.addr));
-            UINT32DECODE(p, hobjid.idx);
-
-            /* Get the dataset region from the heap (allocate inside routine) */
-            if((buf = (uint8_t *)H5HG_read(oloc.file, dxpl_id, &hobjid, NULL, NULL)) == NULL)
-                HGOTO_ERROR(H5E_REFERENCE, H5E_READERROR, FAIL, "Unable to read dataset region information")
-
-            /* Get the object oid for the dataset */
-            p = buf;
-            H5F_addr_decode(oloc.file, &p, &(oloc.addr));
-
-            /* Free the buffer allocated in H5HG_read() */
-            H5MM_xfree(buf);
-        } /* end case */
-        break;
-
-        case H5R_BADTYPE:
-        case H5R_MAXTYPE:
-        default:
-            HDassert("unknown reference type" && 0);
-            HGOTO_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL, "internal error (unknown reference type)")
-    } /* end switch */
-
-    /* Retrieve file ID for name search */
-    if((file_id = H5I_get_file_id(id, FALSE)) < 0)
-        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTGET, FAIL, "can't retrieve file ID")
-
-    /* Get name, length, etc. */
-    if((ret_value = H5G_get_name_by_addr(file_id, lapl_id, dxpl_id, &oloc, name, size)) < 0)
-        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTGET, FAIL, "can't determine name")
-
-done:
-    /* Close file ID used for search */
-    if(file_id > 0 && H5I_dec_ref(file_id) < 0)
-        HDONE_ERROR(H5E_REFERENCE, H5E_CANTDEC, FAIL, "can't decrement ref count of temp ID")
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5R_get_name() */
-
-
-/*--------------------------------------------------------------------------
- NAME
     H5Rget_name
  PURPOSE
     Determines a name for the object referenced
@@ -1030,18 +334,18 @@ H5Rget_name(hid_t id, H5R_type_t ref_type, const void *_ref, char *name,
     H5TRACE5("Zs", "iRt*x*sz", id, ref_type, _ref, name, size);
 
     /* Check args */
-    if(H5G_loc(id, &loc) < 0)
+    if (H5G_loc(id, &loc) < 0)
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
-    if(ref_type <= H5R_BADTYPE || ref_type >= H5R_MAXTYPE)
+    if (ref_type <= H5R_BADTYPE || ref_type >= H5R_MAXTYPE)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference type")
-    if(_ref == NULL)
+    if (_ref == NULL)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference pointer")
 
     /* Get the file pointer from the entry */
     file = loc.oloc->file;
 
     /* Get name */
-    if((ret_value = H5R_get_name(file, H5P_DEFAULT, H5AC_ind_read_dxpl_id, id, ref_type, _ref, name, size)) < 0)
+    if ((ret_value = H5R_get_name(file, H5P_DEFAULT, H5AC_ind_read_dxpl_id, id, ref_type, _ref, name, size)) < 0)
         HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, FAIL, "unable to determine object path")
 
 done:
diff --git a/src/H5Rdeprec.c b/src/H5Rdeprec.c
index 109bbb4..699f8df 100644
--- a/src/H5Rdeprec.c
+++ b/src/H5Rdeprec.c
@@ -13,11 +13,9 @@
 
 /*-------------------------------------------------------------------------
  *
- * Created:	H5Rdeprec.c
- *		September 13 2007
- *		Quincey Koziol <koziol@hdfgroup.org>
+ * Created:     H5Rdeprec.c
  *
- * Purpose:	Deprecated functions from the H5R interface.  These
+ * Purpose:     Deprecated functions from the H5R interface.  These
  *              functions are here for compatibility purposes and may be
  *              removed in the future.  Applications should switch to the
  *              newer APIs.
@@ -35,13 +33,16 @@
 /***********/
 /* Headers */
 /***********/
-#include "H5private.h"		/* Generic Functions			*/
-#include "H5ACprivate.h"	/* Metadata cache			*/
-#include "H5Eprivate.h"		/* Error handling		  	*/
-#include "H5Gprivate.h"		/* Groups				*/
-#include "H5Oprivate.h"		/* Object headers		  	*/
-#include "H5Rpkg.h"		/* References				*/
-#include "H5Ppublic.h"          /* for using H5P_DATASET_ACCESS_DEFAULT */
+/* Public headers needed by this file */
+#include "H5Ppublic.h"          /* Property lists                           */
+
+/* Private headers needed by this file */
+#include "H5private.h"		    /* Generic Functions                        */
+#include "H5ACprivate.h"	    /* Metadata cache                           */
+#include "H5Eprivate.h"		    /* Error handling                           */
+#include "H5Gprivate.h"		    /* Groups                                   */
+#include "H5Oprivate.h"		    /* Object headers                           */
+#include "H5Rpkg.h"             /* References                               */
 
 
 /****************/
@@ -81,29 +82,22 @@
 
 #ifndef H5_NO_DEPRECATED_SYMBOLS
 
-/*--------------------------------------------------------------------------
- NAME
-    H5Rget_obj_type1
- PURPOSE
-    Retrieves the type of object that an object reference points to
- USAGE
-    H5G_obj_t H5Rget_obj_type1(id, ref_type, ref)
-        hid_t id;       IN: Dataset reference object is in or location ID of
-                            object that the dataset is located within.
-        H5R_type_t ref_type;    IN: Type of reference to query
-        void *ref;          IN: Reference to query.
-
- RETURNS
-    Success:	An object type defined in H5Gpublic.h
-    Failure:	H5G_UNKNOWN
- DESCRIPTION
-    Given a reference to some object, this function returns the type of object
-    pointed to.
- GLOBAL VARIABLES
- COMMENTS, BUGS, ASSUMPTIONS
- EXAMPLES
- REVISION LOG
---------------------------------------------------------------------------*/
+/*-------------------------------------------------------------------------
+ * Function:    H5Rget_obj_type1
+ *
+ * Purpose:     Retrieves the type of the object that an object points to.
+ *
+ * Parameters:
+ *      id          IN: Dataset reference object is in or location ID of
+ *                      object that the dataset is located within
+ *      ref_type    IN: Type of reference to query
+ *      ref         IN: Reference to query
+ *
+ * Return:      Success:	An object type (as defined in H5Gpublic.h)
+ *              Failure:    H5G_UNKNOWN
+ *
+ *-------------------------------------------------------------------------
+ */
 H5G_obj_t
 H5Rget_obj_type1(hid_t id, H5R_type_t ref_type, const void *ref)
 {
@@ -115,16 +109,16 @@ H5Rget_obj_type1(hid_t id, H5R_type_t ref_type, const void *ref)
     H5TRACE3("Go", "iRt*x", id, ref_type, ref);
 
     /* Check args */
-    if(H5G_loc(id, &loc) < 0)
+    if (H5G_loc(id, &loc) < 0)
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5G_UNKNOWN, "not a location")
-    if(ref_type <= H5R_BADTYPE || ref_type >= H5R_MAXTYPE)
+    if (ref_type <= H5R_BADTYPE || ref_type >= H5R_MAXTYPE)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5G_UNKNOWN, "invalid reference type")
-    if(ref == NULL)
+    if (ref == NULL)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5G_UNKNOWN, "invalid reference pointer")
 
     /* Get the object information */
-    if(H5R_get_obj_type(loc.oloc->file, H5AC_ind_read_dxpl_id, ref_type, ref, &obj_type) < 0)
-	HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, H5G_UNKNOWN, "unable to determine object type")
+    if (H5R_get_obj_type(loc.oloc->file, H5AC_ind_read_dxpl_id, ref_type, ref, &obj_type) < 0)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, H5G_UNKNOWN, "unable to determine object type")
 
     /* Set return value */
     ret_value = H5G_map_obj_type(obj_type);
@@ -134,28 +128,22 @@ done:
 }   /* end H5Rget_obj_type1() */
 
 
-/*--------------------------------------------------------------------------
- NAME
-    H5Rdereference1
- PURPOSE
-    Opens the HDF5 object referenced.
- USAGE
-    hid_t H5Rdereference1(ref)
-        hid_t id;       IN: Dataset reference object is in or location ID of
-                            object that the dataset is located within.
-        H5R_type_t ref_type;    IN: Type of reference to create
-        void *ref;      IN: Reference to open.
-
- RETURNS
-    Valid ID on success, Negative on failure
- DESCRIPTION
-    Given a reference to some object, open that object and return an ID for
-    that object.
- GLOBAL VARIABLES
- COMMENTS, BUGS, ASSUMPTIONS
- EXAMPLES
- REVISION LOG
---------------------------------------------------------------------------*/
+/*-------------------------------------------------------------------------
+ * Function:    H5Rdereference1
+ *
+ * Purpose:     Opens the HDF5 object referenced.
+ *
+ * Parameters:
+ *      id          IN: Dataset reference object is in or location ID of
+ *                      object that the dataset is located within
+ *      ref_type    IN: Type of reference to create
+ *      ref         IN: Reference to open
+ *
+ * Return:      Success:	Valid HDF5 ID
+ *              Failure:    Negative
+ *
+ *-------------------------------------------------------------------------
+ */
 hid_t
 H5Rdereference1(hid_t obj_id, H5R_type_t ref_type, const void *_ref)
 {
@@ -167,18 +155,18 @@ H5Rdereference1(hid_t obj_id, H5R_type_t ref_type, const void *_ref)
     H5TRACE3("i", "iRt*x", obj_id, ref_type, _ref);
 
     /* Check args */
-    if(H5G_loc(obj_id, &loc) < 0)
+    if (H5G_loc(obj_id, &loc) < 0)
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
-    if(ref_type <= H5R_BADTYPE || ref_type >= H5R_MAXTYPE)
+    if (ref_type <= H5R_BADTYPE || ref_type >= H5R_MAXTYPE)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference type")
-    if(_ref == NULL)
+    if (_ref == NULL)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference pointer")
 
     /* Get the file pointer from the entry */
     file = loc.oloc->file;
 
     /* Create reference */
-    if((ret_value = H5R_dereference(file, H5P_DATASET_ACCESS_DEFAULT, H5AC_ind_read_dxpl_id, ref_type, _ref, TRUE)) < 0)
+    if ((ret_value = H5R_dereference(file, H5P_DATASET_ACCESS_DEFAULT, H5AC_ind_read_dxpl_id, ref_type, _ref, TRUE)) < 0)
         HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, FAIL, "unable dereference object")
 
 done:
diff --git a/src/H5Rint.c b/src/H5Rint.c
new file mode 100644
index 0000000..716a573
--- /dev/null
+++ b/src/H5Rint.c
@@ -0,0 +1,767 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * 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 COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/****************/
+/* Module Setup */
+/****************/
+
+#include "H5Rmodule.h"          /* This source code file is part of the H5R module */
+
+
+/***********/
+/* Headers */
+/***********/
+#include "H5private.h"          /* Generic Functions                        */
+#include "H5ACprivate.h"        /* Metadata cache                           */
+#include "H5Dprivate.h"         /* Datasets                                 */
+#include "H5Eprivate.h"         /* Error handling                           */
+#include "H5Gprivate.h"         /* Groups                                   */
+#include "H5HGprivate.h"        /* Global Heaps                             */
+#include "H5Iprivate.h"         /* IDs                                      */
+#include "H5MMprivate.h"        /* Memory management                        */
+#include "H5Oprivate.h"         /* Object headers                           */
+#include "H5Rpkg.h"             /* References                               */
+#include "H5Sprivate.h"         /* Dataspaces                               */
+#include "H5Tprivate.h"         /* Datatypes                                */
+
+
+/****************/
+/* Local Macros */
+/****************/
+
+/******************/
+/* Local Typedefs */
+/******************/
+
+/********************/
+/* Local Prototypes */
+/********************/
+
+/*********************/
+/* Package Variables */
+/*********************/
+
+/* Package initialization variable */
+hbool_t H5_PKG_INIT_VAR = FALSE;
+
+/*****************************/
+/* Library Private Variables */
+/*****************************/
+
+/*******************/
+/* Local Variables */
+/*******************/
+
+/* Reference ID class
+ *
+ * NOTE: H5I_REFERENCE is not used by the library and has been deprecated
+ *       with a tentative removal version of 1.12.0. (DER, July 2017)
+ */
+static const H5I_class_t H5I_REFERENCE_CLS[1] = {{
+    H5I_REFERENCE,          /* ID class value                                       */
+    0,                      /* Class flags                                          */
+    0,                      /* # of reserved IDs for class                          */
+    NULL                    /* Callback routine for closing objects of this class   */
+}};
+
+/* Flag indicating "top" of interface has been initialized */
+static hbool_t H5R_top_package_initialize_s = FALSE;
+
+
+/*--------------------------------------------------------------------------
+NAME
+   H5R__init_package -- Initialize interface-specific information
+USAGE
+    herr_t H5R__init_package()
+
+RETURNS
+    Non-negative on success/Negative on failure
+DESCRIPTION
+    Initializes any interface-specific data or routines.
+
+--------------------------------------------------------------------------*/
+herr_t
+H5R__init_package(void)
+{
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    /* Initialize the atom group for the file IDs */
+    if (H5I_register_type(H5I_REFERENCE_CLS) < 0)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, FAIL, "unable to initialize interface")
+
+    /* Mark "top" of interface as initialized, too */
+    H5R_top_package_initialize_s = TRUE;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5R__init_package() */
+
+
+/*--------------------------------------------------------------------------
+ NAME
+    H5R_top_term_package
+ PURPOSE
+    Terminate various H5R objects
+ USAGE
+    void H5R_top_term_package()
+ RETURNS
+    void
+ DESCRIPTION
+    Release IDs for the atom group, deferring full interface shutdown
+    until later (in H5R_term_package).
+ GLOBAL VARIABLES
+ COMMENTS, BUGS, ASSUMPTIONS
+     Can't report errors...
+ EXAMPLES
+ REVISION LOG
+--------------------------------------------------------------------------*/
+int
+H5R_top_term_package(void)
+{
+    int	n = 0;
+
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    if (H5R_top_package_initialize_s) {
+        if (H5I_nmembers(H5I_REFERENCE) > 0) {
+            (void)H5I_clear_type(H5I_REFERENCE, FALSE, FALSE);
+            n++;
+	    }
+
+        /* Mark closed */
+        if (0 == n)
+            H5R_top_package_initialize_s = FALSE;
+    }
+
+    FUNC_LEAVE_NOAPI(n)
+} /* end H5R_top_term_package() */
+
+
+/*--------------------------------------------------------------------------
+ NAME
+    H5R_term_package
+ PURPOSE
+    Terminate various H5R objects
+ USAGE
+    void H5R_term_package()
+ RETURNS
+    void
+ DESCRIPTION
+    Release the atom group and any other resources allocated.
+ GLOBAL VARIABLES
+ COMMENTS, BUGS, ASSUMPTIONS
+     Can't report errors...
+
+     Finishes shutting down the interface, after H5R_top_term_package()
+     is called
+ EXAMPLES
+ REVISION LOG
+--------------------------------------------------------------------------*/
+int
+H5R_term_package(void)
+{
+    int	n = 0;
+
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    if (H5_PKG_INIT_VAR) {
+        /* Sanity checks */
+        HDassert(0 == H5I_nmembers(H5I_REFERENCE));
+        HDassert(FALSE == H5R_top_package_initialize_s);
+
+        /* Destroy the reference id group */
+        n += (H5I_dec_type_ref(H5I_REFERENCE) > 0);
+
+        /* Mark closed */
+        if (0 == n)
+            H5_PKG_INIT_VAR = FALSE;
+    }
+
+    FUNC_LEAVE_NOAPI(n)
+} /* end H5R_term_package() */
+
+
+/*--------------------------------------------------------------------------
+ NAME
+    H5R_create
+ PURPOSE
+    Creates a particular kind of reference for the user
+ USAGE
+    herr_t H5R_create(ref, loc, name, ref_type, space)
+        void *ref;          OUT: Reference created
+        H5G_loc_t *loc;     IN: File location used to locate object pointed to
+        const char *name;   IN: Name of object at location LOC_ID of object
+                                    pointed to
+        H5R_type_t ref_type;    IN: Type of reference to create
+        H5S_t *space;       IN: Dataspace ID with selection, used for Dataset
+                                    Region references.
+
+ RETURNS
+    Non-negative on success/Negative on failure
+ DESCRIPTION
+    Creates a particular type of reference specified with REF_TYPE, in the
+    space pointed to by REF.  The LOC_ID and NAME are used to locate the object
+    pointed to and the SPACE_ID is used to choose the region pointed to (for
+    Dataset Region references).
+ GLOBAL VARIABLES
+ COMMENTS, BUGS, ASSUMPTIONS
+ EXAMPLES
+ REVISION LOG
+--------------------------------------------------------------------------*/
+herr_t
+H5R_create(void *_ref, H5G_loc_t *loc, const char *name, H5R_type_t ref_type, H5S_t *space, hid_t dxpl_id)
+{
+    H5G_loc_t	obj_loc;		/* Group hier. location of object */
+    H5G_name_t  path;            	/* Object group hier. path */
+    H5O_loc_t   oloc;            	/* Object object location */
+    hbool_t     obj_found = FALSE;      /* Object location found */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    HDassert(_ref);
+    HDassert(loc);
+    HDassert(name);
+    HDassert(ref_type > H5R_BADTYPE && ref_type < H5R_MAXTYPE);
+
+    /* Set up object location to fill in */
+    obj_loc.oloc = &oloc;
+    obj_loc.path = &path;
+    H5G_loc_reset(&obj_loc);
+
+    /* Find the object */
+    if (H5G_loc_find(loc, name, &obj_loc, H5P_DEFAULT, dxpl_id) < 0)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_NOTFOUND, FAIL, "object not found")
+    obj_found = TRUE;
+
+    switch (ref_type) {
+        case H5R_OBJECT:
+        {
+            hobj_ref_t *ref = (hobj_ref_t *)_ref; /* Get pointer to correct type of reference struct */
+
+            *ref = obj_loc.oloc->addr;
+            break;
+        }
+
+        case H5R_DATASET_REGION:
+        {
+            H5HG_t hobjid;      /* Heap object ID */
+            hdset_reg_ref_t *ref = (hdset_reg_ref_t *)_ref; /* Get pointer to correct type of reference struct */
+            hssize_t buf_size;  /* Size of buffer needed to serialize selection */
+            uint8_t *p;       /* Pointer to OID to store */
+            uint8_t *buf;     /* Buffer to store serialized selection in */
+            unsigned heapid_found;  /* Flag for non-zero heap ID found */
+            unsigned u;        /* local index */
+
+            /* Set up information for dataset region */
+
+            /* Return any previous heap block to the free list if we are
+             * garbage collecting
+             */
+            if (H5F_GC_REF(loc->oloc->file)) {
+                /* Check for an existing heap ID in the reference */
+                for (u = 0, heapid_found = 0, p = (uint8_t *)ref; u < H5R_DSET_REG_REF_BUF_SIZE; u++)
+                    if (p[u] != 0) {
+                        heapid_found = 1;
+                        break;
+                    }
+
+                if (heapid_found != 0) {
+                    /* Return heap block to free list */
+                }
+            }
+
+            /* Zero the heap ID out, may leak heap space if user is re-using
+             * reference and doesn't have garbage collection turned on
+             */
+            HDmemset(ref, 0, H5R_DSET_REG_REF_BUF_SIZE);
+
+            /* Get the amount of space required to serialize the selection */
+            if ((buf_size = H5S_SELECT_SERIAL_SIZE(space)) < 0)
+                HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, FAIL, "Invalid amount of space for serializing selection")
+
+            /* Increase buffer size to allow for the dataset OID */
+            buf_size += (hssize_t)sizeof(haddr_t);
+
+            /* Allocate the space to store the serialized information */
+            H5_CHECK_OVERFLOW(buf_size, hssize_t, size_t);
+            if (NULL == (buf = (uint8_t *)H5MM_malloc((size_t)buf_size)))
+                HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
+
+            /* Serialize information for dataset OID into heap buffer */
+            p = (uint8_t *)buf;
+            H5F_addr_encode(loc->oloc->file, &p, obj_loc.oloc->addr);
+
+            /* Serialize the selection into heap buffer */
+            if (H5S_SELECT_SERIALIZE(space, &p) < 0)
+                HGOTO_ERROR(H5E_REFERENCE, H5E_CANTCOPY, FAIL, "Unable to serialize selection")
+
+            /* Save the serialized buffer for later */
+            H5_CHECK_OVERFLOW(buf_size, hssize_t, size_t);
+            if (H5HG_insert(loc->oloc->file, dxpl_id, (size_t)buf_size, buf, &hobjid) < 0)
+                HGOTO_ERROR(H5E_REFERENCE, H5E_WRITEERROR, FAIL, "Unable to serialize selection")
+
+            /* Serialize the heap ID and index for storage in the file */
+            p = (uint8_t *)ref;
+            H5F_addr_encode(loc->oloc->file, &p, hobjid.addr);
+            UINT32ENCODE(p, hobjid.idx);
+
+            /* Free the buffer we serialized data in */
+            H5MM_xfree(buf);
+            break;
+        } /* end case H5R_DATASET_REGION */
+
+        case H5R_BADTYPE:
+        case H5R_MAXTYPE:
+        default:
+            HDassert("unknown reference type" && 0);
+            HGOTO_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL, "internal error (unknown reference type)")
+    } /* end switch */
+
+done:
+    if (obj_found)
+        H5G_loc_free(&obj_loc);
+
+    FUNC_LEAVE_NOAPI(ret_value)
+}   /* end H5R_create() */
+
+
+/*--------------------------------------------------------------------------
+ NAME
+    H5R_dereference
+ PURPOSE
+    Opens the HDF5 object referenced.
+ USAGE
+    hid_t H5R_dereference(ref)
+        H5F_t *file;        IN: File the object being dereferenced is within
+        H5R_type_t ref_type;    IN: Type of reference
+        void *ref;          IN: Reference to open.
+
+ RETURNS
+    Valid ID on success, Negative on failure
+ DESCRIPTION
+    Given a reference to some object, open that object and return an ID for
+    that object.
+ GLOBAL VARIABLES
+ COMMENTS, BUGS, ASSUMPTIONS
+    Currently only set up to work with references to datasets
+ EXAMPLES
+ REVISION LOG
+    Raymond Lu
+    13 July 2011
+    I added the OAPL_ID parameter for the object being referenced.  It only
+    supports dataset access property list currently.
+
+    M. Scot Breitenfeld
+    3 March 2015
+    Added a check for undefined reference pointer.
+--------------------------------------------------------------------------*/
+hid_t
+H5R_dereference(H5F_t *file, hid_t oapl_id, hid_t dxpl_id, H5R_type_t ref_type, const void *_ref, hbool_t app_ref)
+{
+    H5O_loc_t oloc;             /* Object location */
+    H5G_name_t path;            /* Path of object */
+    H5G_loc_t loc;              /* Group location */
+    unsigned rc;		/* Reference count of object */
+    H5O_type_t obj_type;        /* Type of object */
+    hid_t ret_value = H5I_INVALID_HID;  /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    HDassert(_ref);
+    HDassert(ref_type > H5R_BADTYPE && ref_type < H5R_MAXTYPE);
+    HDassert(file);
+
+    /* Initialize the object location */
+    H5O_loc_reset(&oloc);
+    oloc.file = file;
+
+    switch (ref_type) {
+        case H5R_OBJECT:
+        {
+            oloc.addr = *(const hobj_ref_t *)_ref; /* Only object references currently supported */
+            if (!H5F_addr_defined(oloc.addr) || oloc.addr == 0)
+                HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "Undefined reference pointer")
+            break;
+        }
+
+        case H5R_DATASET_REGION:
+        {
+            H5HG_t hobjid;  /* Heap object ID */
+            uint8_t *buf;   /* Buffer to store serialized selection in */
+            const uint8_t *p;           /* Pointer to OID to store */
+
+            /* Get the heap ID for the dataset region */
+            p = (const uint8_t *)_ref;
+            H5F_addr_decode(oloc.file, &p, &(hobjid.addr));
+            UINT32DECODE(p, hobjid.idx);
+
+            if (!H5F_addr_defined(hobjid.addr) || hobjid.addr == 0)
+                HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "Undefined reference pointer")
+
+            /* Get the dataset region from the heap (allocate inside routine) */
+            if (NULL == (buf = (uint8_t *)H5HG_read(oloc.file, dxpl_id, &hobjid, NULL, NULL)))
+                HGOTO_ERROR(H5E_REFERENCE, H5E_READERROR, FAIL, "Unable to read dataset region information")
+
+            /* Get the object oid for the dataset */
+            p = buf;
+            H5F_addr_decode(oloc.file, &p, &(oloc.addr));
+
+            /* Free the buffer allocated in H5HG_read() */
+            H5MM_xfree(buf);
+            break;
+        } /* end case H5R_DATASET_REGION */
+
+        case H5R_BADTYPE:
+        case H5R_MAXTYPE:
+        default:
+            HDassert("unknown reference type" && 0);
+            HGOTO_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL, "internal error (unknown reference type)")
+    } /* end switch */
+
+    /* Get the # of links for object, and its type
+     * (To check to make certain that this object hasn't been deleted
+     *  since the reference was created)
+     */
+    if (H5O_get_rc_and_type(&oloc, dxpl_id, &rc, &obj_type) < 0 || 0 == rc)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_LINKCOUNT, FAIL, "dereferencing deleted object")
+
+    /* Construct a group location for opening the object */
+    H5G_name_reset(&path);
+    loc.oloc = &oloc;
+    loc.path = &path;
+
+    /* Open the object */
+    switch (obj_type) {
+        case H5O_TYPE_GROUP:
+        {
+            H5G_t *group;               /* Pointer to group to open */
+
+            if (NULL == (group = H5G_open(&loc, dxpl_id)))
+                HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "not found")
+
+            /* Create an atom for the group */
+            if ((ret_value = H5I_register(H5I_GROUP, group, app_ref)) < 0) {
+                H5G_close(group);
+                HGOTO_ERROR(H5E_SYM, H5E_CANTREGISTER, FAIL, "can't register group")
+            }
+
+            break;
+        }
+
+        case H5O_TYPE_NAMED_DATATYPE:
+        {
+            H5T_t *type;                /* Pointer to datatype to open */
+
+            if (NULL == (type = H5T_open(&loc, dxpl_id)))
+                HGOTO_ERROR(H5E_DATATYPE, H5E_NOTFOUND, FAIL, "not found")
+
+            /* Create an atom for the datatype */
+            if ((ret_value = H5I_register(H5I_DATATYPE, type, app_ref)) < 0) {
+                H5T_close(type);
+                HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, FAIL, "can't register datatype")
+            }
+
+            break;
+        }
+
+        case H5O_TYPE_DATASET:
+        {
+            H5D_t *dset;                /* Pointer to dataset to open */
+
+            /* Open the dataset */
+            if (NULL == (dset = H5D_open(&loc, oapl_id, dxpl_id)))
+                HGOTO_ERROR(H5E_DATASET, H5E_NOTFOUND, FAIL, "not found")
+
+            /* Create an atom for the dataset */
+            if ((ret_value = H5I_register(H5I_DATASET, dset, app_ref)) < 0) {
+                H5D_close(dset);
+                HGOTO_ERROR(H5E_DATASET, H5E_CANTREGISTER, FAIL, "can't register dataset")
+            }
+
+            break;
+        }
+
+        case H5O_TYPE_UNKNOWN:
+        case H5O_TYPE_NTYPES:
+        default:
+            HGOTO_ERROR(H5E_REFERENCE, H5E_BADTYPE, FAIL, "can't identify type of object referenced")
+     } /* end switch */
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+}   /* end H5R_dereference() */
+
+
+/*--------------------------------------------------------------------------
+ NAME
+    H5R_get_region
+ PURPOSE
+    Retrieves a dataspace with the region pointed to selected.
+ USAGE
+    H5S_t *H5R_get_region(file, ref_type, ref)
+        H5F_t *file;        IN: File the object being dereferenced is within
+        void *ref;          IN: Reference to open.
+
+ RETURNS
+    Pointer to the dataspace on success, NULL on failure
+ DESCRIPTION
+    Given a reference to some object, creates a copy of the dataset pointed
+    to's dataspace and defines a selection in the copy which is the region
+    pointed to.
+ GLOBAL VARIABLES
+ COMMENTS, BUGS, ASSUMPTIONS
+ EXAMPLES
+ REVISION LOG
+--------------------------------------------------------------------------*/
+H5S_t *
+H5R_get_region(H5F_t *file, hid_t dxpl_id, const void *_ref)
+{
+    H5O_loc_t oloc;             /* Object location */
+    const uint8_t *p;           /* Pointer to OID to store */
+    H5HG_t hobjid;              /* Heap object ID */
+    uint8_t *buf = NULL;        /* Buffer to store serialized selection in */
+    H5S_t *ret_value;
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    HDassert(_ref);
+    HDassert(file);
+
+    /* Initialize the object location */
+    H5O_loc_reset(&oloc);
+    oloc.file = file;
+
+    /* Get the heap ID for the dataset region */
+    p = (const uint8_t *)_ref;
+    H5F_addr_decode(oloc.file, &p, &(hobjid.addr));
+    UINT32DECODE(p, hobjid.idx);
+
+    /* Get the dataset region from the heap (allocate inside routine) */
+    if ((buf = (uint8_t *)H5HG_read(oloc.file, dxpl_id, &hobjid, NULL, NULL)) == NULL)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_READERROR, NULL, "Unable to read dataset region information")
+
+    /* Get the object oid for the dataset */
+    p = buf;
+    H5F_addr_decode(oloc.file, &p, &(oloc.addr));
+
+    /* Open and copy the dataset's dataspace */
+    if ((ret_value = H5S_read(&oloc, dxpl_id)) == NULL)
+        HGOTO_ERROR(H5E_DATASPACE, H5E_NOTFOUND, NULL, "not found")
+
+    /* Unserialize the selection */
+    if (H5S_SELECT_DESERIALIZE(&ret_value, &p) < 0)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTDECODE, NULL, "can't deserialize selection")
+
+done:
+    /* Free the buffer allocated in H5HG_read() */
+    if (buf)
+        H5MM_xfree(buf);
+
+    FUNC_LEAVE_NOAPI(ret_value)
+}   /* end H5R_get_region() */
+
+
+/*--------------------------------------------------------------------------
+ NAME
+    H5R_get_obj_type
+ PURPOSE
+    Retrieves the type of object that an object reference points to
+ USAGE
+    H5O_type_t H5R_get_obj_type(file, ref_type, ref)
+        H5F_t *file;        IN: File the object being dereferenced is within
+        H5R_type_t ref_type;    IN: Type of reference to query
+        void *ref;          IN: Reference to query.
+
+ RETURNS
+    Success:	An object type defined in H5Gpublic.h
+    Failure:	H5G_UNKNOWN
+ DESCRIPTION
+    Given a reference to some object, this function returns the type of object
+    pointed to.
+ GLOBAL VARIABLES
+ COMMENTS, BUGS, ASSUMPTIONS
+ EXAMPLES
+ REVISION LOG
+--------------------------------------------------------------------------*/
+herr_t
+H5R_get_obj_type(H5F_t *file, hid_t dxpl_id, H5R_type_t ref_type,
+    const void *_ref, H5O_type_t *obj_type)
+{
+    H5O_loc_t oloc;             /* Object location */
+    unsigned rc;		/* Reference count of object    */
+    herr_t ret_value = SUCCEED; /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    HDassert(file);
+    HDassert(_ref);
+
+    /* Initialize the symbol table entry */
+    H5O_loc_reset(&oloc);
+    oloc.file = file;
+
+    switch (ref_type) {
+        case H5R_OBJECT:
+        {
+            /* Get the object oid */
+            oloc.addr = *(const hobj_ref_t *)_ref; /* Only object references currently supported */
+            break;
+        }
+
+        case H5R_DATASET_REGION:
+        {
+            H5HG_t hobjid;      /* Heap object ID */
+            const uint8_t *p;   /* Pointer to reference to decode */
+            uint8_t *buf;       /* Buffer to store serialized selection in */
+
+            /* Get the heap ID for the dataset region */
+            p = (const uint8_t *)_ref;
+            H5F_addr_decode(oloc.file, &p, &(hobjid.addr));
+            UINT32DECODE(p, hobjid.idx);
+
+            /* Get the dataset region from the heap (allocate inside routine) */
+            if ((buf = (uint8_t *)H5HG_read(oloc.file, dxpl_id, &hobjid, NULL, NULL)) == NULL)
+                HGOTO_ERROR(H5E_REFERENCE, H5E_READERROR, FAIL, "Unable to read dataset region information")
+
+            /* Get the object oid for the dataset */
+            p = buf;
+            H5F_addr_decode(oloc.file, &p, &(oloc.addr));
+
+            /* Free the buffer allocated in H5HG_read() */
+            H5MM_xfree(buf);
+
+            break;
+        }
+
+        case H5R_BADTYPE:
+        case H5R_MAXTYPE:
+        default:
+            HDassert("unknown reference type" && 0);
+            HGOTO_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL, "internal error (unknown reference type)")
+    } /* end switch */
+
+    /* Get the # of links for object, and its type */
+    /* (To check to make certain that this object hasn't been deleted since the reference was created) */
+    if (H5O_get_rc_and_type(&oloc, dxpl_id, &rc, obj_type) < 0 || 0 == rc)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_LINKCOUNT, FAIL, "dereferencing deleted object")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+}   /* end H5R_get_obj_type() */
+
+
+/*--------------------------------------------------------------------------
+ NAME
+    H5R_get_name
+ PURPOSE
+    Internal routine to determine a name for the object referenced
+ USAGE
+    ssize_t H5R_get_name(f, dxpl_id, ref_type, ref, name, size)
+        H5F_t *f;       IN: Pointer to the file that the reference is pointing
+                            into
+        hid_t lapl_id;  IN: LAPL to use for operation
+        hid_t dxpl_id;  IN: DXPL to use for operation
+        hid_t id;       IN: Location ID given for reference
+        H5R_type_t ref_type;    IN: Type of reference
+        void *ref;      IN: Reference to query.
+        char *name;     OUT: Buffer to place name of object referenced
+        size_t size;    IN: Size of name buffer
+
+ RETURNS
+    Non-negative length of the path on success, Negative on failure
+ DESCRIPTION
+    Given a reference to some object, determine a path to the object
+    referenced in the file.
+ GLOBAL VARIABLES
+ COMMENTS, BUGS, ASSUMPTIONS
+    This may not be the only path to that object.
+ EXAMPLES
+ REVISION LOG
+--------------------------------------------------------------------------*/
+ssize_t
+H5R_get_name(H5F_t *f, hid_t lapl_id, hid_t dxpl_id, hid_t id, H5R_type_t ref_type,
+    const void *_ref, char *name, size_t size)
+{
+    hid_t file_id = H5I_INVALID_HID;    /* ID for file that the reference is in */
+    H5O_loc_t oloc;             /* Object location describing object for reference */
+    ssize_t ret_value = -1;     /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    /* Check args */
+    HDassert(f);
+    HDassert(_ref);
+
+    /* Initialize the object location */
+    H5O_loc_reset(&oloc);
+    oloc.file = f;
+
+    /* Get address for reference */
+    switch (ref_type) {
+        case H5R_OBJECT:
+        {
+            oloc.addr = *(const hobj_ref_t *)_ref;
+            break;
+        }
+
+        case H5R_DATASET_REGION:
+        {
+            H5HG_t hobjid;  /* Heap object ID */
+            uint8_t *buf;   /* Buffer to store serialized selection in */
+            const uint8_t *p;           /* Pointer to OID to store */
+
+            /* Get the heap ID for the dataset region */
+            p = (const uint8_t *)_ref;
+            H5F_addr_decode(oloc.file, &p, &(hobjid.addr));
+            UINT32DECODE(p, hobjid.idx);
+
+            /* Get the dataset region from the heap (allocate inside routine) */
+            if ((buf = (uint8_t *)H5HG_read(oloc.file, dxpl_id, &hobjid, NULL, NULL)) == NULL)
+                HGOTO_ERROR(H5E_REFERENCE, H5E_READERROR, FAIL, "Unable to read dataset region information")
+
+            /* Get the object oid for the dataset */
+            p = buf;
+            H5F_addr_decode(oloc.file, &p, &(oloc.addr));
+
+            /* Free the buffer allocated in H5HG_read() */
+            H5MM_xfree(buf);
+
+            break;
+        }
+
+        case H5R_BADTYPE:
+        case H5R_MAXTYPE:
+        default:
+            HDassert("unknown reference type" && 0);
+            HGOTO_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL, "internal error (unknown reference type)")
+    } /* end switch */
+
+    /* Retrieve file ID for name search */
+    if ((file_id = H5I_get_file_id(id, FALSE)) < 0)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTGET, FAIL, "can't retrieve file ID")
+
+    /* Get name, length, etc. */
+    if ((ret_value = H5G_get_name_by_addr(file_id, lapl_id, dxpl_id, &oloc, name, size)) < 0)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTGET, FAIL, "can't determine name")
+
+done:
+    /* Close file ID used for search */
+    if (file_id > 0 && H5I_dec_ref(file_id) < 0)
+        HDONE_ERROR(H5E_REFERENCE, H5E_CANTDEC, FAIL, "can't decrement ref count of temp ID")
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5R_get_name() */
+
diff --git a/src/H5Rmodule.h b/src/H5Rmodule.h
index 2eaf050..678a668 100644
--- a/src/H5Rmodule.h
+++ b/src/H5Rmodule.h
@@ -10,13 +10,9 @@
  * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
-/*
- * Programmer:	Quincey Koziol <koziol@hdfgroup.org>
- *		Saturday, September 12, 2015
- *
- * Purpose:	This file contains declarations which define macros for the
- *		H5R package.  Including this header means that the source file
- *		is part of the H5R package.
+/* Purpose: This file contains declarations which define macros for the
+ *          H5R package.  Including this header means that the source file
+ *          is part of the H5R package.
  */
 #ifndef _H5Rmodule_H
 #define _H5Rmodule_H
@@ -31,4 +27,3 @@
 
 #endif /* _H5Rmodule_H */
 
-
diff --git a/src/H5Rpkg.h b/src/H5Rpkg.h
index 6d5036b..129f944 100644
--- a/src/H5Rpkg.h
+++ b/src/H5Rpkg.h
@@ -11,11 +11,7 @@
  * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
-/*
- * Programmer: Quincey Koziol <koziol@hdfgroup.org>
- *             Thursday, September 13, 2007
- *
- * Purpose:     This file contains declarations which are visible
+/* Purpose:     This file contains declarations which are visible
  *              only within the H5R package. Source files outside the
  *              H5R package should include H5Rprivate.h instead.
  */
@@ -30,7 +26,6 @@
 #include "H5Rprivate.h"
 
 /* Other private headers needed by this file */
-#include "H5Fprivate.h"         /* File access				*/
 
 /**************************/
 /* Package Private Macros */
@@ -51,12 +46,5 @@
 /* Package Private Prototypes */
 /******************************/
 
-/* General functions */
-H5_DLL herr_t H5R_get_obj_type(H5F_t *file, hid_t dxpl_id, H5R_type_t ref_type,
-    const void *_ref, H5O_type_t *obj_type);
-H5_DLL hid_t H5R_dereference(H5F_t *file, hid_t dapl_id, hid_t dxpl_id, H5R_type_t ref_type,
-    const void *_ref, hbool_t app_ref);
-
-
 #endif /* _H5Rpkg_H */
 
diff --git a/src/H5Rprivate.h b/src/H5Rprivate.h
index 7efa225..35e63d2 100644
--- a/src/H5Rprivate.h
+++ b/src/H5Rprivate.h
@@ -20,10 +20,40 @@
 #include "H5Rpublic.h"
 
 /* Private headers needed by this file */
+#include "H5Fprivate.h"         /* Files                                    */
+#include "H5Gprivate.h"         /* Groups                                   */
+#include "H5Oprivate.h"         /* Object headers                           */
+#include "H5Sprivate.h"         /* Dataspaces                               */
 
-/* Internal data structures */
 
-/* Private functions */
+/**************************/
+/* Library Private Macros */
+/**************************/
+
+
+/****************************/
+/* Library Private Typedefs */
+/****************************/
+
+
+/*****************************/
+/* Library Private Variables */
+/*****************************/
+
+
+/******************************/
+/* Library Private Prototypes */
+/******************************/
+
+H5_DLL herr_t H5R_create(void *ref, H5G_loc_t *loc, const char *name,
+    H5R_type_t ref_type, H5S_t *space, hid_t dxpl_id);
+H5_DLL H5S_t * H5R_get_region(H5F_t *file, hid_t dxpl_id, const void *_ref);
+H5_DLL ssize_t H5R_get_name(H5F_t *file, hid_t lapl_id, hid_t dxpl_id, hid_t id,
+    H5R_type_t ref_type, const void *_ref, char *name, size_t size);
+H5_DLL herr_t H5R_get_obj_type(H5F_t *file, hid_t dxpl_id, H5R_type_t ref_type,
+    const void *_ref, H5O_type_t *obj_type);
+H5_DLL hid_t H5R_dereference(H5F_t *file, hid_t dapl_id, hid_t dxpl_id, H5R_type_t ref_type,
+    const void *_ref, hbool_t app_ref);
 
 #endif  /* _H5Rprivate_H */
 
diff --git a/src/H5Rpublic.h b/src/H5Rpublic.h
index 446b7cd..598bafd 100644
--- a/src/H5Rpublic.h
+++ b/src/H5Rpublic.h
@@ -22,40 +22,59 @@
 #include "H5Gpublic.h"
 #include "H5Ipublic.h"
 
-/*
- * Reference types allowed.
- */
-typedef enum {
-    H5R_BADTYPE     =   (-1),   /*invalid Reference Type                     */
-    H5R_OBJECT,                 /*Object reference                           */
-    H5R_DATASET_REGION,         /*Dataset Region Reference                   */
-    H5R_MAXTYPE                 /*highest type (Invalid as true type)	     */
-} H5R_type_t;
+/*****************/
+/* Public Macros */
+/*****************/
 
 /* Note! Be careful with the sizes of the references because they should really
  * depend on the run-time values in the file.  Unfortunately, the arrays need
- * to be defined at compile-time, so we have to go with the worst case sizes for
- * them.  -QAK
+ * to be defined at compile-time, so we have to go with the worst case sizes
+ * for them.  -QAK
+ */
+#define H5R_OBJ_REF_BUF_SIZE        sizeof(haddr_t)
+
+/* 4 is used instead of sizeof(int) to permit portability between the Crays
+ * and other machines (the heap ID is always encoded as an int32 anyway).
+ */
+#define H5R_DSET_REG_REF_BUF_SIZE   (sizeof(haddr_t) + 4)
+
+/*******************/
+/* Public Typedefs */
+/*******************/
+
+/* Reference types */
+typedef enum H5R_type_t {
+    H5R_BADTYPE     =   (-1),   /* Invalid Reference Type               */
+    H5R_OBJECT,                 /* Object reference                     */
+    H5R_DATASET_REGION,         /* Dataset Region Reference             */
+    H5R_MAXTYPE                 /* Highest type (Invalid as true type)  */
+} H5R_type_t;
+
+/* Object reference structure for user's code
+ * This needs to be large enough to store largest haddr_t on a worst case
+ * machine (8 bytes currently).
+ */
+typedef haddr_t hobj_ref_t;
+
+/* Dataset Region reference structure for user's code
+ * (Buffer to store heap ID and index)
+ * This needs to be large enough to store largest haddr_t in a worst case
+ * machine (8 bytes currently) plus an int
  */
-#define H5R_OBJ_REF_BUF_SIZE    sizeof(haddr_t)
-/* Object reference structure for user's code */
-typedef haddr_t hobj_ref_t; /* Needs to be large enough to store largest haddr_t in a worst case machine (ie. 8 bytes currently) */
+typedef unsigned char hdset_reg_ref_t[H5R_DSET_REG_REF_BUF_SIZE];
 
-#define H5R_DSET_REG_REF_BUF_SIZE    (sizeof(haddr_t)+4)
-/* 4 is used instead of sizeof(int) to permit portability between
-   the Crays and other machines (the heap ID is always encoded as an int32 anyway)
-*/
-/* Dataset Region reference structure for user's code */
-typedef unsigned char hdset_reg_ref_t[H5R_DSET_REG_REF_BUF_SIZE];/* Buffer to store heap ID and index */
-/* Needs to be large enough to store largest haddr_t in a worst case machine (ie. 8 bytes currently) plus an int */
+/********************/
+/* Public Variables */
+/********************/
 
-/* Publicly visible data structures */
+/*********************/
+/* Public Prototypes */
+/*********************/
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-/* Functions in H5R.c */
 H5_DLL herr_t H5Rcreate(void *ref, hid_t loc_id, const char *name,
 			 H5R_type_t ref_type, hid_t space_id);
 H5_DLL hid_t H5Rdereference2(hid_t obj_id, hid_t oapl_id, H5R_type_t ref_type, const void *ref);
@@ -63,7 +82,7 @@ H5_DLL hid_t H5Rget_region(hid_t dataset, H5R_type_t ref_type, const void *ref);
 H5_DLL herr_t H5Rget_obj_type2(hid_t id, H5R_type_t ref_type, const void *_ref,
     H5O_type_t *obj_type);
 H5_DLL ssize_t H5Rget_name(hid_t loc_id, H5R_type_t ref_type, const void *ref,
-    char *name/*out*/, size_t size);
+    char *name /*out*/, size_t size);
 
 /* Symbols defined for compatibility with previous versions of the HDF5 API.
  *
@@ -71,12 +90,6 @@ H5_DLL ssize_t H5Rget_name(hid_t loc_id, H5R_type_t ref_type, const void *ref,
  */
 #ifndef H5_NO_DEPRECATED_SYMBOLS
 
-/* Macros */
-
-
-/* Typedefs */
-
-
 /* Function prototypes */
 H5_DLL H5G_obj_t H5Rget_obj_type1(hid_t id, H5R_type_t ref_type, const void *_ref);
 H5_DLL hid_t H5Rdereference1(hid_t obj_id, H5R_type_t ref_type, const void *ref);
diff --git a/src/H5Sprivate.h b/src/H5Sprivate.h
index 11fb7fe..068283a 100644
--- a/src/H5Sprivate.h
+++ b/src/H5Sprivate.h
@@ -17,6 +17,9 @@
 #ifndef _H5Sprivate_H
 #define _H5Sprivate_H
 
+/* Early typedefs to avoid circular dependencies */
+typedef struct H5S_t H5S_t;
+
 /* Include package's public header */
 #include "H5Spublic.h"
 
@@ -44,7 +47,6 @@
 #define H5S_GET_SEQ_LIST_SORTED         0x0001
 
 /* Forward references of package typedefs */
-typedef struct H5S_t H5S_t;
 typedef struct H5S_extent_t H5S_extent_t;
 typedef struct H5S_pnt_node_t H5S_pnt_node_t;
 typedef struct H5S_hyper_span_t H5S_hyper_span_t;
diff --git a/src/H5Tdbg.c b/src/H5Tdbg.c
index f434543..eb648f3 100644
--- a/src/H5Tdbg.c
+++ b/src/H5Tdbg.c
@@ -32,9 +32,9 @@
 /***********/
 /* Headers */
 /***********/
-#include "H5private.h"		/* Generic Functions			*/
-#include "H5Eprivate.h"		/* Error handling		  	*/
-#include "H5Tpkg.h"		/* Datatypes         			*/
+#include "H5private.h"          /* Generic Functions                        */
+#include "H5Eprivate.h"         /* Error handling                           */
+#include "H5Tpkg.h"             /* Datatypes                                */
 
 
 /****************/
@@ -74,28 +74,21 @@
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T__print_stats
+ * Function:    H5T__print_stats
  *
- * Purpose:	Print statistics about a conversion path.  Statistics are
- *		printed only if all the following conditions are true:
+ * Purpose:     Print statistics about a conversion path.  Statistics are
+ *              printed only if all the following conditions are true:
  *
- * 		1. The library was compiled with H5T_DEBUG defined.
- *		2. Data type debugging is turned on at run time.
- *		3. The path was called at least one time.
+ *              1. The library was compiled with H5T_DEBUG defined.
+ *              2. Data type debugging is turned on at run time.
+ *              3. The path was called at least one time.
  *
- *		The optional NPRINT argument keeps track of the number of
- *		conversions paths for which statistics have been shown. If
- *		its value is zero then table headers are printed before the
- *		first line of output.
+ *              The optional NPRINT argument keeps track of the number of
+ *              conversions paths for which statistics have been shown. If
+ *              its value is zero then table headers are printed before the
+ *              first line of output.
  *
- * Return:	Success:	non-negative
- *
- *		Failure:	negative
- *
- * Programmer:	Robb Matzke
- *              Monday, December 14, 1998
- *
- * Modifications:
+ * Return:      SUCCEED/FAIL
  *
  *-------------------------------------------------------------------------
  */
@@ -110,34 +103,34 @@ H5T__print_stats(H5T_path_t H5_ATTR_UNUSED * path, int H5_ATTR_UNUSED * nprint/*
     FUNC_ENTER_PACKAGE_NOERR
 
 #ifdef H5T_DEBUG
-    if(H5DEBUG(T) && path->stats.ncalls > 0) {
-	if(nprint && 0 == (*nprint)++) {
-	    HDfprintf(H5DEBUG(T), "H5T: type conversion statistics:\n");
-	    HDfprintf(H5DEBUG(T), "   %-16s %10s %10s %8s %8s %8s %10s\n",
-		       "Conversion", "Elmts", "Calls", "User",
-		       "System", "Elapsed", "Bandwidth");
-	    HDfprintf(H5DEBUG(T), "   %-16s %10s %10s %8s %8s %8s %10s\n",
-		       "----------", "-----", "-----", "----",
-		       "------", "-------", "---------");
-	}
-        if(path->src && path->dst)
+    if (H5DEBUG(T) && path->stats.ncalls > 0) {
+        if (nprint && 0 == (*nprint)++) {
+            HDfprintf(H5DEBUG(T), "H5T: type conversion statistics:\n");
+            HDfprintf(H5DEBUG(T), "   %-16s %10s %10s %8s %8s %8s %10s\n",
+                "Conversion", "Elmts", "Calls", "User",
+                "System", "Elapsed", "Bandwidth");
+            HDfprintf(H5DEBUG(T), "   %-16s %10s %10s %8s %8s %8s %10s\n",
+                "----------", "-----", "-----", "----",
+                "------", "-------", "---------");
+        }
+        if (path->src && path->dst)
             nbytes = MAX(H5T_get_size(path->src), H5T_get_size(path->dst));
-        else if(path->src)
+        else if (path->src)
             nbytes = H5T_get_size(path->src);
-        else if(path->dst)
+        else if (path->dst)
             nbytes = H5T_get_size(path->dst);
         else
             nbytes = 0;
-	nbytes *= path->stats.nelmts;
-	H5_bandwidth(bandwidth, (double)nbytes, path->stats.timer.etime);
-	HDfprintf(H5DEBUG(T), "   %-16s %10Hd %10d %8.2f %8.2f %8.2f %10s\n",
-		   path->name,
-		   path->stats.nelmts,
-		   path->stats.ncalls,
-		   path->stats.timer.utime,
-		   path->stats.timer.stime,
-		   path->stats.timer.etime,
-		   bandwidth);
+        nbytes *= path->stats.nelmts;
+        H5_bandwidth(bandwidth, (double)nbytes, path->stats.timer.etime);
+        HDfprintf(H5DEBUG(T), "   %-16s %10Hd %10d %8.2f %8.2f %8.2f %10s\n",
+            path->name,
+            path->stats.nelmts,
+            path->stats.ncalls,
+            path->stats.timer.utime,
+            path->stats.timer.stime,
+            path->stats.timer.etime,
+            bandwidth);
     }
 #endif
     FUNC_LEAVE_NOAPI(SUCCEED)
@@ -145,24 +138,20 @@ H5T__print_stats(H5T_path_t H5_ATTR_UNUSED * path, int H5_ATTR_UNUSED * nprint/*
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T_debug
- *
- * Purpose:	Prints information about a data type.
+ * Function:    H5T_debug
  *
- * Return:	Non-negative on success/Negative on failure
+ * Purpose:     Prints information about a data type.
  *
- * Programmer:	Robb Matzke
- *		Wednesday, January  7, 1998
- *
- * Modifications:
+ * Return:      SUCCEED/FAIL
  *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T_debug(const H5T_t *dt, FILE *stream)
 {
-    const char	*s1 = "", *s2 = "";
-    unsigned	i;
+    const char  *s1 = "";
+    const char  *s2 = "";
+    unsigned    i;
     herr_t      ret_value = SUCCEED;       /* Return value */
 
     FUNC_ENTER_NOAPI_NOINIT
@@ -171,7 +160,7 @@ H5T_debug(const H5T_t *dt, FILE *stream)
     HDassert(dt);
     HDassert(stream);
 
-    switch(dt->shared->type) {
+    switch (dt->shared->type) {
         case H5T_NO_CLASS:
             HGOTO_ERROR(H5E_DATATYPE, H5E_BADTYPE, FAIL, "no class");
             break;
@@ -221,9 +210,9 @@ H5T_debug(const H5T_t *dt, FILE *stream)
         default:
             s1 = "";
             break;
-    } /* end switch */
+    }  /* end switch */
 
-    switch(dt->shared->state) {
+    switch (dt->shared->state) {
         case H5T_STATE_TRANSIENT:
             s2 = "[transient]";
             break;
@@ -245,14 +234,14 @@ H5T_debug(const H5T_t *dt, FILE *stream)
             break;
         default:
             HDassert(0 && "This Should never be executed!");
-    } /* end switch */
+    }  /* end switch */
 
-    fprintf(stream, "%s%s {nbytes=%lu", s1, s2, (unsigned long)(dt->shared->size));
+    HDfprintf(stream, "%s%s {nbytes=%lu", s1, s2, (unsigned long)(dt->shared->size));
 
-    if(H5T_IS_ATOMIC(dt->shared)) {
-        uint64_t	tmp;
+    if (H5T_IS_ATOMIC(dt->shared)) {
+        uint64_t    tmp;
 
-	switch(dt->shared->u.atomic.order) {
+        switch (dt->shared->u.atomic.order) {
             case H5T_ORDER_ERROR:
                 HGOTO_ERROR(H5E_DATATYPE, H5E_BADTYPE, FAIL, "order error");
                 break;
@@ -277,17 +266,16 @@ H5T_debug(const H5T_t *dt, FILE *stream)
             default:
                 s1 = "order?";
                 break;
-	} /* end switch */
+        } /* end switch */
+
+        HDfprintf(stream, ", %s", s1);
 
-	fprintf(stream, ", %s", s1);
+        if (dt->shared->u.atomic.offset)
+            HDfprintf(stream, ", offset=%lu", (unsigned long) (dt->shared->u.atomic.offset));
+        if (dt->shared->u.atomic.prec != 8 * dt->shared->size)
+            HDfprintf(stream, ", prec=%lu", (unsigned long) (dt->shared->u.atomic.prec));
 
-	if(dt->shared->u.atomic.offset)
-	    fprintf(stream, ", offset=%lu",
-		    (unsigned long) (dt->shared->u.atomic.offset));
-	if(dt->shared->u.atomic.prec != 8 * dt->shared->size)
-	    fprintf(stream, ", prec=%lu",
-		    (unsigned long) (dt->shared->u.atomic.prec));
-	switch(dt->shared->type) {
+        switch (dt->shared->type) {
             case H5T_NO_CLASS:
                 HGOTO_ERROR(H5E_DATATYPE, H5E_BADTYPE, FAIL, "no class");
                 break;
@@ -313,7 +301,7 @@ H5T_debug(const H5T_t *dt, FILE *stream)
 
                 } /* end switch */
                 if(s1)
-                    fprintf(stream, ", %s", s1);
+                    HDfprintf(stream, ", %s", s1);
                 break;
 
             case H5T_FLOAT:
@@ -339,23 +327,24 @@ H5T_debug(const H5T_t *dt, FILE *stream)
                         break;
                 } /* end switch */
 
-                fprintf(stream, ", sign=%lu+1",
+                HDfprintf(stream, ", sign=%lu+1",
                         (unsigned long)(dt->shared->u.atomic.u.f.sign));
-                fprintf(stream, ", mant=%lu+%lu (%s)",
+                HDfprintf(stream, ", mant=%lu+%lu (%s)",
                         (unsigned long)(dt->shared->u.atomic.u.f.mpos),
                         (unsigned long)(dt->shared->u.atomic.u.f.msize), s1);
-                fprintf(stream, ", exp=%lu+%lu",
+                HDfprintf(stream, ", exp=%lu+%lu",
                         (unsigned long)(dt->shared->u.atomic.u.f.epos),
                         (unsigned long)(dt->shared->u.atomic.u.f.esize));
                 tmp = dt->shared->u.atomic.u.f.ebias >> 32;
-                if(tmp) {
+                if (tmp) {
                     size_t hi = (size_t)tmp;
                     size_t lo = (size_t)(dt->shared->u.atomic.u.f.ebias & 0xffffffff);
-                    fprintf(stream, " bias=0x%08lx%08lx",
+                    HDfprintf(stream, " bias=0x%08lx%08lx",
                             (unsigned long)hi, (unsigned long)lo);
-                } else {
+                }
+                else {
                     size_t lo = (size_t)(dt->shared->u.atomic.u.f.ebias & 0xffffffff);
-                    fprintf(stream, " bias=0x%08lx", (unsigned long)lo);
+                    HDfprintf(stream, " bias=0x%08lx", (unsigned long)lo);
                 }
                 break;
 
@@ -372,69 +361,73 @@ H5T_debug(const H5T_t *dt, FILE *stream)
             default:
                 /* No additional info */
                 break;
-	} /* end switch */
-    } else if(H5T_COMPOUND == dt->shared->type) {
-	/* Compound data type */
-	for(i = 0; i < dt->shared->u.compnd.nmembs; i++) {
-	    fprintf(stream, "\n\"%s\" @%lu",
-		    dt->shared->u.compnd.memb[i].name,
-		    (unsigned long)(dt->shared->u.compnd.memb[i].offset));
-	    fprintf(stream, " ");
-	    H5T_debug(dt->shared->u.compnd.memb[i].type, stream);
-	} /* end for */
-	fprintf(stream, "\n");
-    } else if(H5T_VLEN == dt->shared->type) {
-        switch(dt->shared->u.vlen.loc) {
+        } /* end switch */
+    }
+    else if (H5T_COMPOUND == dt->shared->type) {
+        /* Compound data type */
+        for (i = 0; i < dt->shared->u.compnd.nmembs; i++) {
+            HDfprintf(stream, "\n\"%s\" @%lu",
+                    dt->shared->u.compnd.memb[i].name,
+                    (unsigned long)(dt->shared->u.compnd.memb[i].offset));
+            HDfprintf(stream, " ");
+            H5T_debug(dt->shared->u.compnd.memb[i].type, stream);
+        } /* end for */
+        HDfprintf(stream, "\n");
+    }
+    else if (H5T_VLEN == dt->shared->type) {
+        switch (dt->shared->u.vlen.loc) {
             case H5T_LOC_BADLOC:
                 HGOTO_ERROR(H5E_DATATYPE, H5E_BADTYPE, FAIL, "invalid datatype location");
                 break;
 
             case H5T_LOC_MEMORY:
-                fprintf(stream, ", loc=memory");
+                HDfprintf(stream, ", loc=memory");
                 break;
 
             case H5T_LOC_DISK:
-                fprintf(stream, ", loc=disk");
+                HDfprintf(stream, ", loc=disk");
                 break;
 
             case H5T_LOC_MAXLOC:
             default:
-                fprintf(stream, ", loc=UNKNOWN");
+                HDfprintf(stream, ", loc=UNKNOWN");
                 break;
         } /* end switch */
 
-        if(H5T_IS_VL_STRING(dt->shared))
+        if (H5T_IS_VL_STRING(dt->shared))
             /* Variable length string datatype */
-            fprintf(stream, ", variable-length");
+            HDfprintf(stream, ", variable-length");
         else {
             /* Variable length sequence datatype */
-            fprintf(stream, " VLEN ");
+            HDfprintf(stream, " VLEN ");
             H5T_debug(dt->shared->parent, stream);
-            fprintf(stream, "\n");
+            HDfprintf(stream, "\n");
         } /* end else */
-    } else if(H5T_ENUM == dt->shared->type) {
+    }
+    else if (H5T_ENUM == dt->shared->type) {
         size_t	base_size;
 
-	/* Enumeration data type */
-	fprintf(stream, " ");
-	H5T_debug(dt->shared->parent, stream);
-	base_size = dt->shared->parent->shared->size;
-	for(i = 0; i < dt->shared->u.enumer.nmembs; i++) {
+        /* Enumeration data type */
+        HDfprintf(stream, " ");
+        H5T_debug(dt->shared->parent, stream);
+        base_size = dt->shared->parent->shared->size;
+        for (i = 0; i < dt->shared->u.enumer.nmembs; i++) {
             size_t	k;
 
-	    fprintf(stream, "\n\"%s\" = 0x", dt->shared->u.enumer.name[i]);
-	    for(k = 0; k < base_size; k++)
-		fprintf(stream, "%02lx",
-			(unsigned long)(dt->shared->u.enumer.value + (i * base_size) + k));
-	} /* end for */
-	fprintf(stream, "\n");
-    } else if(H5T_OPAQUE == dt->shared->type) {
-	fprintf(stream, ", tag=\"%s\"", dt->shared->u.opaque.tag);
-    } else {
-	/* Unknown */
-	fprintf(stream, "unknown class %d\n", (int)(dt->shared->type));
+            HDfprintf(stream, "\n\"%s\" = 0x", dt->shared->u.enumer.name[i]);
+            for (k = 0; k < base_size; k++)
+                HDfprintf(stream, "%02lx", (unsigned long)(dt->shared->u.enumer.value + (i * base_size) + k));
+        } /* end for */
+        HDfprintf(stream, "\n");
+    }
+    else if (H5T_OPAQUE == dt->shared->type) {
+        HDfprintf(stream, ", tag=\"%s\"", dt->shared->u.opaque.tag);
+    }
+    else {
+        /* Unknown */
+        HDfprintf(stream, "unknown class %d\n", (int)(dt->shared->type));
     }
-    fprintf(stream, "}");
+    HDfprintf(stream, "}");
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
diff --git a/src/H5Tprivate.h b/src/H5Tprivate.h
index f2da62e..17cdc49 100644
--- a/src/H5Tprivate.h
+++ b/src/H5Tprivate.h
@@ -17,6 +17,9 @@
 #ifndef _H5Tprivate_H
 #define _H5Tprivate_H
 
+/* Early typedefs to avoid circular dependencies */
+typedef struct H5T_t H5T_t;
+
 /* Get package's public header */
 #include "H5Tpublic.h"
 
@@ -45,7 +48,6 @@
 #endif /* H5T_MODULE */
 
 /* Forward references of package typedefs (declared in H5Tpkg.h) */
-typedef struct H5T_t H5T_t;
 typedef struct H5T_stats_t H5T_stats_t;
 typedef struct H5T_path_t H5T_path_t;
 
diff --git a/src/H5Z.c b/src/H5Z.c
index a9f7336..6f173b2 100644
--- a/src/H5Z.c
+++ b/src/H5Z.c
@@ -86,24 +86,24 @@ H5Z__init_package(void)
     FUNC_ENTER_PACKAGE
 
     /* Internal filters */
-    if (H5Z_register (H5Z_SHUFFLE) < 0)
-        HGOTO_ERROR (H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register shuffle filter")
-    if (H5Z_register (H5Z_FLETCHER32) < 0)
-        HGOTO_ERROR (H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register fletcher32 filter")
-    if (H5Z_register (H5Z_NBIT) < 0)
-        HGOTO_ERROR (H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register nbit filter")
-    if (H5Z_register (H5Z_SCALEOFFSET) < 0)
-        HGOTO_ERROR (H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register scaleoffset filter")
+    if (H5Z_register(H5Z_SHUFFLE) < 0)
+        HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register shuffle filter")
+    if (H5Z_register(H5Z_FLETCHER32) < 0)
+        HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register fletcher32 filter")
+    if (H5Z_register(H5Z_NBIT) < 0)
+        HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register nbit filter")
+    if (H5Z_register(H5Z_SCALEOFFSET) < 0)
+        HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register scaleoffset filter")
 
     /* External filters */
 #ifdef H5_HAVE_FILTER_DEFLATE
-    if (H5Z_register (H5Z_DEFLATE) < 0)
-        HGOTO_ERROR (H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register deflate filter")
+    if (H5Z_register(H5Z_DEFLATE) < 0)
+        HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register deflate filter")
 #endif /* H5_HAVE_FILTER_DEFLATE */
 #ifdef H5_HAVE_FILTER_SZIP
     H5Z_SZIP->encoder_present = SZ_encoder_enabled();
-    if (H5Z_register (H5Z_SZIP) < 0)
-        HGOTO_ERROR (H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register szip filter")
+    if (H5Z_register(H5Z_SZIP) < 0)
+        HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register szip filter")
 #endif /* H5_HAVE_FILTER_SZIP */
 
 done:
@@ -180,7 +180,7 @@ H5Z_term_package(void)
         } /* end if */
 #endif /* H5Z_DEBUG */
         /* Free the table of filters */
-        if(H5Z_table_g) {
+        if (H5Z_table_g) {
             H5Z_table_g = (H5Z_class2_t *)H5MM_xfree(H5Z_table_g);
 #ifdef H5Z_DEBUG
             H5Z_stat_table_g = (H5Z_stats_t *)H5MM_xfree(H5Z_stat_table_g);
@@ -191,7 +191,7 @@ H5Z_term_package(void)
         } /* end if */
 
         /* Mark interface as closed */
-        if(0 == n)
+        if (0 == n)
             H5_PKG_INIT_VAR = FALSE;
     } /* end if */
 
@@ -219,7 +219,7 @@ H5Zregister(const void *cls)
 
     /* Check args */
     if (cls_real==NULL)
-        HGOTO_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "invalid filter class")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid filter class")
 
     /* Check H5Z_class_t version number; this is where a function to convert
      * from an outdated version should be called.
@@ -251,20 +251,20 @@ H5Zregister(const void *cls)
 
 #else /* H5_NO_DEPRECATED_SYMBOLS */
         /* Deprecated symbols not allowed, throw an error */
-        HGOTO_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "invalid H5Z_class_t version number");
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid H5Z_class_t version number");
 #endif /* H5_NO_DEPRECATED_SYMBOLS */
     } /* end if */
 
     if (cls_real->id < 0 || cls_real->id > H5Z_FILTER_MAX)
-        HGOTO_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "invalid filter identification number")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid filter identification number")
     if (cls_real->id < H5Z_FILTER_RESERVED)
-        HGOTO_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "unable to modify predefined filters")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "unable to modify predefined filters")
     if (cls_real->filter == NULL)
-        HGOTO_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "no filter function specified")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no filter function specified")
 
     /* Do it */
-    if (H5Z_register (cls_real) < 0)
-        HGOTO_ERROR (H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register filter")
+    if (H5Z_register(cls_real) < 0)
+        HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register filter")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -275,7 +275,7 @@ done:
  * Function: H5Z_register
  *
  * Purpose:  Same as the public version except this one allows filters
- *           to be set for predefined method numbers <H5Z_FILTER_RESERVED
+ *           to be set for predefined method numbers < H5Z_FILTER_RESERVED
  *
  * Return:   Non-negative on success
  *           Negative on failure
@@ -289,8 +289,8 @@ H5Z_register (const H5Z_class2_t *cls)
 
     FUNC_ENTER_NOAPI(FAIL)
 
-    HDassert (cls);
-    HDassert (cls->id >= 0 && cls->id <= H5Z_FILTER_MAX);
+    HDassert(cls);
+    HDassert(cls->id >= 0 && cls->id <= H5Z_FILTER_MAX);
 
     /* Is the filter already registered? */
     for (i = 0; i < H5Z_table_used_g; i++)
@@ -306,11 +306,11 @@ H5Z_register (const H5Z_class2_t *cls)
             H5Z_stats_t *stat_table = (H5Z_stats_t *)H5MM_realloc(H5Z_stat_table_g, n * sizeof(H5Z_stats_t));
 #endif /* H5Z_DEBUG */
             if (!table)
-                HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to extend filter table")
+                HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to extend filter table")
             H5Z_table_g = table;
 #ifdef H5Z_DEBUG
             if (!stat_table)
-                HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to extend filter statistics table")
+                HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to extend filter statistics table")
             H5Z_stat_table_g = stat_table;
 #endif /* H5Z_DEBUG */
             H5Z_table_alloc_g = n;
@@ -318,15 +318,15 @@ H5Z_register (const H5Z_class2_t *cls)
 
         /* Initialize */
         i = H5Z_table_used_g++;
-        HDmemcpy (H5Z_table_g+i, cls, sizeof(H5Z_class2_t));
+        HDmemcpy(H5Z_table_g+i, cls, sizeof(H5Z_class2_t));
 #ifdef H5Z_DEBUG
-        HDmemset (H5Z_stat_table_g+i, 0, sizeof(H5Z_stats_t));
+        HDmemset(H5Z_stat_table_g+i, 0, sizeof(H5Z_stats_t));
 #endif /* H5Z_DEBUG */
     } /* end if */
     /* Filter already registered */
     else {
         /* Replace old contents */
-        HDmemcpy (H5Z_table_g+i, cls, sizeof(H5Z_class2_t));
+        HDmemcpy(H5Z_table_g+i, cls, sizeof(H5Z_class2_t));
     } /* end else */
 
 done:
@@ -420,9 +420,9 @@ H5Z_unregister(H5Z_filter_t filter_id)
 
     /* Remove filter from table */
     /* Don't worry about shrinking table size (for now) */
-    HDmemmove (&H5Z_table_g[filter_index], &H5Z_table_g[filter_index+1], sizeof(H5Z_class2_t)*((H5Z_table_used_g-1)-filter_index));
+    HDmemmove(&H5Z_table_g[filter_index], &H5Z_table_g[filter_index+1], sizeof(H5Z_class2_t)*((H5Z_table_used_g-1)-filter_index));
 #ifdef H5Z_DEBUG
-    HDmemmove (&H5Z_stat_table_g[filter_index], &H5Z_stat_table_g[filter_index+1], sizeof(H5Z_stats_t)*((H5Z_table_used_g-1)-filter_index));
+    HDmemmove(&H5Z_stat_table_g[filter_index], &H5Z_stat_table_g[filter_index+1], sizeof(H5Z_stats_t)*((H5Z_table_used_g-1)-filter_index));
 #endif /* H5Z_DEBUG */
     H5Z_table_used_g--;
 
@@ -450,11 +450,11 @@ H5Z__check_unregister(hid_t ocpl_id, H5Z_filter_t filter_id)
 
     /* Get the plist structure of object creation */
     if (NULL == (plist = H5P_object_verify(ocpl_id, H5P_OBJECT_CREATE)))
-        HGOTO_ERROR (H5E_PLINE, H5E_BADATOM, FAIL, "can't find object for ID")
+        HGOTO_ERROR(H5E_PLINE, H5E_BADATOM, FAIL, "can't find object for ID")
 
     /* Check if the object creation property list uses the filter */
     if ((ret_value = H5P_filter_in_pline(plist, filter_id)) < 0)
-        HGOTO_ERROR (H5E_PLINE, H5E_CANTGET, FAIL, "can't check filter in pipeline")
+        HGOTO_ERROR(H5E_PLINE, H5E_CANTGET, FAIL, "can't check filter in pipeline")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -487,11 +487,11 @@ H5Z__check_unregister_group_cb(void *obj_ptr, hid_t H5_ATTR_UNUSED obj_id, void
 
     /* Get the group creation property */
     if ((ocpl_id = H5G_get_create_plist((H5G_t *)obj_ptr)) < 0)
-        HGOTO_ERROR (H5E_PLINE, H5E_CANTGET, FAIL, "can't get group creation property list")
+        HGOTO_ERROR(H5E_PLINE, H5E_CANTGET, FAIL, "can't get group creation property list")
 
     /* Check if the filter is in the group creation property list */
     if ((filter_in_pline = H5Z__check_unregister(ocpl_id, object->filter_id)) < 0)
-        HGOTO_ERROR (H5E_PLINE, H5E_CANTGET, FAIL, "can't check filter in pipeline")
+        HGOTO_ERROR(H5E_PLINE, H5E_CANTGET, FAIL, "can't check filter in pipeline")
 
     /* H5I_iterate expects TRUE to stop the loop over objects. Stop the loop and
      * let H5Z_unregister return failure.
@@ -504,7 +504,7 @@ H5Z__check_unregister_group_cb(void *obj_ptr, hid_t H5_ATTR_UNUSED obj_id, void
 done:
     if (ocpl_id > 0)
         if (H5I_dec_app_ref(ocpl_id) < 0)
-            HDONE_ERROR (H5E_PLINE, H5E_CANTDEC, FAIL, "can't release plist")
+            HDONE_ERROR(H5E_PLINE, H5E_CANTDEC, FAIL, "can't release plist")
 
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5Z__check_unregister_group_cb() */
@@ -532,15 +532,15 @@ H5Z__check_unregister_dset_cb(void *obj_ptr, hid_t H5_ATTR_UNUSED obj_id, void *
 
     FUNC_ENTER_STATIC
 
-    HDassert (obj_ptr);
+    HDassert(obj_ptr);
 
     /* Get the dataset creation property */
     if ((ocpl_id = H5D_get_create_plist((H5D_t *)obj_ptr)) < 0)
-        HGOTO_ERROR (H5E_PLINE, H5E_CANTGET, FAIL, "can't get dataset creation property list")
+        HGOTO_ERROR(H5E_PLINE, H5E_CANTGET, FAIL, "can't get dataset creation property list")
 
     /* Check if the filter is in the dataset creation property list */
     if ((filter_in_pline = H5Z__check_unregister(ocpl_id, object->filter_id)) < 0)
-        HGOTO_ERROR (H5E_PLINE, H5E_CANTGET, FAIL, "can't check filter in pipeline")
+        HGOTO_ERROR(H5E_PLINE, H5E_CANTGET, FAIL, "can't check filter in pipeline")
 
     /* H5I_iterate expects TRUE to stop the loop over objects. Stop the loop and
      * let H5Z_unregister return failure.
@@ -553,7 +553,7 @@ H5Z__check_unregister_dset_cb(void *obj_ptr, hid_t H5_ATTR_UNUSED obj_id, void *
 done:
     if (ocpl_id > 0)
         if (H5I_dec_app_ref(ocpl_id) < 0)
-            HDONE_ERROR (H5E_PLINE, H5E_CANTDEC, FAIL, "can't release plist")
+            HDONE_ERROR(H5E_PLINE, H5E_CANTDEC, FAIL, "can't release plist")
 
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5Z__check_unregister_dset_cb() */
@@ -576,13 +576,13 @@ H5Z__flush_file_cb(void *obj_ptr, hid_t H5_ATTR_UNUSED obj_id, void H5_ATTR_UNUS
 
     FUNC_ENTER_STATIC
 
-    HDassert (obj_ptr);
+    HDassert(obj_ptr);
 
     /* Call the flush routine for mounted file hierarchies. Do a global flush
      * if the file is opened for write */
     if (H5F_ACC_RDWR & H5F_INTENT((H5F_t *)obj_ptr)) {
         if (H5F_flush_mounts((H5F_t *)obj_ptr, H5AC_ind_read_dxpl_id, H5AC_rawdata_dxpl_id) < 0)
-            HGOTO_ERROR (H5E_PLINE, H5E_CANTFLUSH, FAIL, "unable to flush file hierarchy")
+            HGOTO_ERROR(H5E_PLINE, H5E_CANTFLUSH, FAIL, "unable to flush file hierarchy")
     } /* end if */
 
 done:
@@ -608,10 +608,10 @@ H5Zfilter_avail(H5Z_filter_t id)
 
     /* Check args */
     if (id < 0 || id > H5Z_FILTER_MAX)
-        HGOTO_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "invalid filter identification number")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid filter identification number")
 
     if ((ret_value = H5Z_filter_avail(id)) < 0)
-        HGOTO_ERROR (H5E_PLINE, H5E_NOTFOUND, FAIL, "unable to check the availability of the filter")
+        HGOTO_ERROR(H5E_PLINE, H5E_NOTFOUND, FAIL, "unable to check the availability of the filter")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -629,22 +629,25 @@ done:
 htri_t
 H5Z_filter_avail(H5Z_filter_t id)
 {
-    size_t    i;                   /* Local index variable */
-    H5Z_class2_t *filter_info;
-    htri_t    ret_value = FALSE;   /* Return value */
+    H5PL_key_t          key;                /* Key for finding a plugin     */
+    const H5Z_class2_t *filter_info;        /* Filter information           */
+    size_t              i;                  /* Local index variable         */
+    htri_t              ret_value = FALSE;  /* Return value                 */
 
     FUNC_ENTER_NOAPI(FAIL)
 
     /* Is the filter already registered? */
     for (i = 0; i < H5Z_table_used_g; i++)
         if (H5Z_table_g[i].id == id)
-            HGOTO_DONE (TRUE)
+            HGOTO_DONE(TRUE)
 
-    if (NULL != (filter_info = (const H5Z_class2_t *)H5PL_load(H5PL_TYPE_FILTER, (int)id))) {
-        if (H5Z_register (filter_info) < 0)
-            HGOTO_ERROR (H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register loaded filter")
-        HGOTO_DONE (TRUE)
+    key.id = (int)id;
+    if (NULL != (filter_info = (const H5Z_class2_t *)H5PL_load(H5PL_TYPE_FILTER, key))) {
+        if (H5Z_register(filter_info) < 0)
+            HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register loaded filter")
+        HGOTO_DONE(TRUE)
     }
+
 done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5Z_filter_avail() */
@@ -683,7 +686,7 @@ H5Z_prelude_callback(const H5O_pline_t *pline, hid_t dcpl_id, hid_t type_id,
             if (pline->filter[u].flags & H5Z_FLAG_OPTIONAL)
                 H5E_clear_stack (NULL);
             else
-                HGOTO_ERROR (H5E_PLINE, H5E_NOTFOUND, FAIL, "required filter was not located")
+                HGOTO_ERROR(H5E_PLINE, H5E_NOTFOUND, FAIL, "required filter was not located")
         } /* end if */
         else {
             /* Make correct callback */
@@ -691,7 +694,7 @@ H5Z_prelude_callback(const H5O_pline_t *pline, hid_t dcpl_id, hid_t type_id,
                 case H5Z_PRELUDE_CAN_APPLY:
                     /* Check if filter is configured to be able to encode */
                     if (!fclass->encoder_present)
-                        HGOTO_ERROR (H5E_PLINE, H5E_NOENCODER, FAIL, "Filter present but encoding is disabled.");
+                        HGOTO_ERROR(H5E_PLINE, H5E_NOENCODER, FAIL, "Filter present but encoding is disabled.");
 
 
                     /* Check if there is a "can apply" callback */
@@ -716,12 +719,12 @@ H5Z_prelude_callback(const H5O_pline_t *pline, hid_t dcpl_id, hid_t type_id,
                         /* Make callback to filter's "set local" function */
                         if ((fclass->set_local)(dcpl_id, type_id, space_id) < 0)
                             /* Indicate error during filter callback */
-                            HGOTO_ERROR (H5E_PLINE, H5E_SETLOCAL, FAIL, "error during user callback")
+                            HGOTO_ERROR(H5E_PLINE, H5E_SETLOCAL, FAIL, "error during user callback")
                     } /* end if */
                     break;
 
                 default:
-                    HDassert ("invalid prelude type" && 0);
+                    HDassert("invalid prelude type" && 0);
             } /* end switch */
         } /* end else */
     } /* end for */
@@ -749,28 +752,32 @@ static herr_t
 H5Z_prepare_prelude_callback_dcpl(hid_t dcpl_id, hid_t type_id, H5Z_prelude_type_t prelude_type)
 {
     hid_t   space_id = -1;            /* ID for dataspace describing chunk */
+    H5O_layout_t *dcpl_layout = NULL; /* Dataset's layout information */
     herr_t  ret_value = SUCCEED;      /* Return value */
 
     FUNC_ENTER_NOAPI_NOINIT
 
-    HDassert (H5I_GENPROP_LST == H5I_get_type(dcpl_id));
-    HDassert (H5I_DATATYPE == H5I_get_type(type_id));
+    HDassert(H5I_GENPROP_LST == H5I_get_type(dcpl_id));
+    HDassert(H5I_DATATYPE == H5I_get_type(type_id));
 
     /* Check if the property list is non-default */
     if (dcpl_id != H5P_DATASET_CREATE_DEFAULT) {
-        H5P_genplist_t     *dc_plist;       /* Dataset creation property list object */
-        H5O_layout_t        dcpl_layout;    /* Dataset's layout information */
+        H5P_genplist_t     *dc_plist;           /* Dataset creation property list object */
+
+        /* Get memory for the layout */
+        if (NULL == (dcpl_layout = (H5O_layout_t *)H5MM_calloc(sizeof(H5O_layout_t))))
+            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to allocate dcpl layout buffer")
 
         /* Get dataset creation property list object */
         if (NULL == (dc_plist = (H5P_genplist_t *)H5I_object(dcpl_id)))
             HGOTO_ERROR (H5E_ARGS, H5E_BADTYPE, FAIL, "can't get dataset creation property list")
 
         /* Peek at the layout information */
-        if (H5P_peek(dc_plist, H5D_CRT_LAYOUT_NAME, &dcpl_layout) < 0)
+        if (H5P_peek(dc_plist, H5D_CRT_LAYOUT_NAME, dcpl_layout) < 0)
             HGOTO_ERROR (H5E_PLIST, H5E_CANTGET, FAIL, "can't retrieve layout")
 
         /* Check if the dataset is chunked */
-        if (H5D_CHUNKED == dcpl_layout.type) {
+        if (H5D_CHUNKED == dcpl_layout->type) {
             H5O_pline_t     dcpl_pline;     /* Object's I/O pipeline information */
 
             /* Get I/O pipeline information */
@@ -784,28 +791,31 @@ H5Z_prepare_prelude_callback_dcpl(hid_t dcpl_id, hid_t type_id, H5Z_prelude_type
                 size_t  u;               /* Local index variable */
 
                 /* Create a dataspace for a chunk & set the extent */
-                for (u = 0; u < dcpl_layout.u.chunk.ndims; u++)
-                    chunk_dims[u] = dcpl_layout.u.chunk.dim[u];
-                if (NULL == (space = H5S_create_simple(dcpl_layout.u.chunk.ndims, chunk_dims, NULL)))
+                for (u = 0; u < dcpl_layout->u.chunk.ndims; u++)
+                    chunk_dims[u] = dcpl_layout->u.chunk.dim[u];
+                if (NULL == (space = H5S_create_simple(dcpl_layout->u.chunk.ndims, chunk_dims, NULL)))
                     HGOTO_ERROR (H5E_DATASPACE, H5E_CANTCREATE, FAIL, "can't create simple dataspace")
 
                 /* Get ID for dataspace to pass to filter routines */
                 if ((space_id = H5I_register(H5I_DATASPACE, space, FALSE)) < 0) {
-                    (void)H5S_close (space);
+                    (void)H5S_close(space);
                     HGOTO_ERROR (H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register dataspace ID")
-                } /* end if */
+                }
 
                 /* Make the callbacks */
                 if (H5Z_prelude_callback(&dcpl_pline, dcpl_id, type_id, space_id, prelude_type) < 0)
                     HGOTO_ERROR (H5E_PLINE, H5E_CANAPPLY, FAIL, "unable to apply filter")
-            } /* end if */
-        } /* end if */
-    } /* end if */
+            }
+        }
+    }
 
 done:
     if (space_id > 0 && H5I_dec_ref(space_id) < 0)
         HDONE_ERROR(H5E_PLINE, H5E_CANTRELEASE, FAIL, "unable to close dataspace")
 
+    if (dcpl_layout)
+        dcpl_layout = (H5O_layout_t *)H5MM_xfree(dcpl_layout);
+
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5Z_prepare_prelude_callback_dcpl() */
 
@@ -834,7 +844,7 @@ H5Z_can_apply(hid_t dcpl_id, hid_t type_id)
 
     /* Make "can apply" callbacks for filters in pipeline */
     if (H5Z_prepare_prelude_callback_dcpl(dcpl_id, type_id, H5Z_PRELUDE_CAN_APPLY) < 0)
-        HGOTO_ERROR (H5E_PLINE, H5E_CANAPPLY, FAIL, "unable to apply filter")
+        HGOTO_ERROR(H5E_PLINE, H5E_CANAPPLY, FAIL, "unable to apply filter")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -865,7 +875,7 @@ H5Z_set_local(hid_t dcpl_id, hid_t type_id)
 
     /* Make "set local" callbacks for filters in pipeline */
     if (H5Z_prepare_prelude_callback_dcpl(dcpl_id, type_id, H5Z_PRELUDE_SET_LOCAL) < 0)
-        HGOTO_ERROR (H5E_PLINE, H5E_SETLOCAL, FAIL, "local filter parameters not set")
+        HGOTO_ERROR(H5E_PLINE, H5E_SETLOCAL, FAIL, "local filter parameters not set")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -890,11 +900,11 @@ H5Z_can_apply_direct(const H5O_pline_t *pline)
 
     FUNC_ENTER_NOAPI(FAIL)
 
-    HDassert (pline->nused > 0);
+    HDassert(pline->nused > 0);
 
     /* Make "can apply" callbacks for filters in pipeline */
     if (H5Z_prelude_callback(pline, (hid_t)-1, (hid_t)-1, (hid_t)-1, H5Z_PRELUDE_CAN_APPLY) < 0)
-        HGOTO_ERROR (H5E_PLINE, H5E_CANAPPLY, FAIL, "unable to apply filter")
+        HGOTO_ERROR(H5E_PLINE, H5E_CANAPPLY, FAIL, "unable to apply filter")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -923,11 +933,11 @@ H5Z_set_local_direct(const H5O_pline_t *pline)
 
     FUNC_ENTER_NOAPI(FAIL)
 
-    HDassert (pline->nused > 0);
+    HDassert(pline->nused > 0);
 
     /* Make "set local" callbacks for filters in pipeline */
     if (H5Z_prelude_callback(pline, (hid_t)-1, (hid_t)-1, (hid_t)-1, H5Z_PRELUDE_SET_LOCAL) < 0)
-        HGOTO_ERROR (H5E_PLINE, H5E_SETLOCAL, FAIL, "local filter parameters not set")
+        HGOTO_ERROR(H5E_PLINE, H5E_SETLOCAL, FAIL, "local filter parameters not set")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -952,10 +962,10 @@ H5Z_modify(const H5O_pline_t *pline, H5Z_filter_t filter, unsigned flags,
 
     FUNC_ENTER_NOAPI(FAIL)
 
-    HDassert (pline);
-    HDassert (filter >= 0 && filter <= H5Z_FILTER_MAX);
-    HDassert (0 == (flags & ~((unsigned)H5Z_FLAG_DEFMASK)));
-    HDassert (0 == cd_nelmts || cd_values);
+    HDassert(pline);
+    HDassert(filter >= 0 && filter <= H5Z_FILTER_MAX);
+    HDassert(0 == (flags & ~((unsigned)H5Z_FLAG_DEFMASK)));
+    HDassert(0 == cd_nelmts || cd_values);
 
     /* Locate the filter in the pipeline */
     for (idx = 0; idx < pline->nused; idx++)
@@ -964,7 +974,7 @@ H5Z_modify(const H5O_pline_t *pline, H5Z_filter_t filter, unsigned flags,
 
     /* Check if the filter was not already in the pipeline */
     if (idx > pline->nused)
-        HGOTO_ERROR (H5E_PLINE, H5E_NOTFOUND, FAIL, "filter not in pipeline")
+        HGOTO_ERROR(H5E_PLINE, H5E_NOTFOUND, FAIL, "filter not in pipeline")
 
     /* Change parameters for filter */
     pline->filter[idx].flags = flags;
@@ -982,7 +992,7 @@ H5Z_modify(const H5O_pline_t *pline, H5Z_filter_t filter, unsigned flags,
         if (cd_nelmts > H5Z_COMMON_CD_VALUES) {
             pline->filter[idx].cd_values = (unsigned *)H5MM_malloc(cd_nelmts * sizeof(unsigned));
             if (NULL == pline->filter[idx].cd_values)
-                HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for filter parameters")
+                HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for filter parameters")
         } /* end if */
         else
             pline->filter[idx].cd_values = pline->filter[idx]._cd_values;
@@ -1017,10 +1027,10 @@ H5Z_append(H5O_pline_t *pline, H5Z_filter_t filter, unsigned flags,
 
     FUNC_ENTER_NOAPI(FAIL)
 
-    HDassert (pline);
-    HDassert (filter >= 0 && filter <= H5Z_FILTER_MAX);
-    HDassert (0 == (flags & ~((unsigned)H5Z_FLAG_DEFMASK)));
-    HDassert (0 == cd_nelmts || cd_values);
+    HDassert(pline);
+    HDassert(filter >= 0 && filter <= H5Z_FILTER_MAX);
+    HDassert(0 == (flags & ~((unsigned)H5Z_FLAG_DEFMASK)));
+    HDassert(0 == cd_nelmts || cd_values);
 
     /*
      * Check filter limit.  We do it here for early warnings although we may
@@ -1052,13 +1062,13 @@ H5Z_append(H5O_pline_t *pline, H5Z_filter_t filter, unsigned flags,
         x.nalloc = MAX(H5Z_MAX_NFILTERS, 2 * pline->nalloc);
         x.filter = (H5Z_filter_info_t *)H5MM_realloc(pline->filter, x.nalloc * sizeof(x.filter[0]));
         if (NULL == x.filter)
-            HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for filter pipeline")
+            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for filter pipeline")
 
         /* Fix pointers in previous filters that need to point to their own
          *      internal data.
          */
-        for(n = 0; n < pline->nalloc; ++n)
-            if(x.filter[n].cd_values == (void *) ~((size_t) NULL))
+        for (n = 0; n < pline->nalloc; ++n)
+            if (x.filter[n].cd_values == (void *) ~((size_t) NULL))
                 x.filter[n].cd_values = x.filter[n]._cd_values;
 
         /* Point to newly allocated buffer */
@@ -1079,7 +1089,7 @@ H5Z_append(H5O_pline_t *pline, H5Z_filter_t filter, unsigned flags,
         if (cd_nelmts > H5Z_COMMON_CD_VALUES) {
             pline->filter[idx].cd_values = (unsigned *)H5MM_malloc(cd_nelmts * sizeof(unsigned));
             if (NULL == pline->filter[idx].cd_values)
-                HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for filter")
+                HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for filter")
         } /* end if */
         else
             pline->filter[idx].cd_values = pline->filter[idx]._cd_values;
@@ -1118,7 +1128,7 @@ H5Z_find_idx(H5Z_filter_t id)
 
     for (i = 0; i < H5Z_table_used_g; i++)
         if (H5Z_table_g[i].id == id)
-            HGOTO_DONE ((int)i)
+            HGOTO_DONE((int)i)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1145,10 +1155,10 @@ H5Z_find(H5Z_filter_t id)
 
     /* Get the index in the global table */
     if ((idx = H5Z_find_idx(id)) < 0)
-        HGOTO_ERROR (H5E_PLINE, H5E_NOTFOUND, NULL, "required filter %d is not registered", id)
+        HGOTO_ERROR(H5E_PLINE, H5E_NOTFOUND, NULL, "required filter %d is not registered", id)
 
     /* Set return value */
-    ret_value = H5Z_table_g+idx;
+    ret_value = H5Z_table_g + idx;
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1197,12 +1207,12 @@ H5Z_pipeline(const H5O_pline_t *pline, unsigned flags,
 
     FUNC_ENTER_NOAPI(FAIL)
 
-    HDassert (0 == (flags & ~((unsigned)H5Z_FLAG_INVMASK)));
-    HDassert (filter_mask);
-    HDassert (nbytes && *nbytes>0);
-    HDassert (buf_size && *buf_size>0);
-    HDassert (buf && *buf);
-    HDassert (!pline || pline->nused<H5Z_MAX_NFILTERS);
+    HDassert(0 == (flags & ~((unsigned)H5Z_FLAG_INVMASK)));
+    HDassert(filter_mask);
+    HDassert(nbytes && *nbytes>0);
+    HDassert(buf_size && *buf_size>0);
+    HDassert(buf && *buf);
+    HDassert(!pline || pline->nused < H5Z_MAX_NFILTERS);
 
     if (pline && (flags & H5Z_FLAG_REVERSE)) { /* Read */
         for (i = pline->nused; i > 0; --i) {
@@ -1219,18 +1229,20 @@ H5Z_pipeline(const H5O_pline_t *pline, unsigned flags,
              */
             if ((fclass_idx = H5Z_find_idx(pline->filter[idx].id)) < 0) {
                 hbool_t issue_error = FALSE;
+                H5PL_key_t key;
                 const H5Z_class2_t    *filter_info;
 
                 /* Try loading the filter */
-                if (NULL != (filter_info = (const H5Z_class2_t *)H5PL_load(H5PL_TYPE_FILTER, (int)(pline->filter[idx].id)))) {
+                key.id = (int)(pline->filter[idx].id);
+                if(NULL != (filter_info = (const H5Z_class2_t *)H5PL_load(H5PL_TYPE_FILTER, key))) {
                     /* Register the filter we loaded */
-                    if (H5Z_register(filter_info) < 0)
-                        HGOTO_ERROR (H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register filter")
+                    if(H5Z_register(filter_info) < 0)
+                        HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register filter")
 
                     /* Search in the table of registered filters again to find the dynamic filter just loaded and registered */
                     if ((fclass_idx = H5Z_find_idx(pline->filter[idx].id)) < 0)
                         issue_error = TRUE;
-                } /* end if */
+                }
                 else
                     issue_error = TRUE;
 
@@ -1242,7 +1254,7 @@ H5Z_pipeline(const H5O_pline_t *pline, unsigned flags,
                         HGOTO_ERROR(H5E_PLINE, H5E_READERROR, FAIL, "required filter '%s' is not registered", pline->filter[idx].name)
                     else
                         HGOTO_ERROR(H5E_PLINE, H5E_READERROR, FAIL, "required filter (name unavailable) is not registered")
-                } /* end if */
+                }
             } /* end if */
 
             fclass = &H5Z_table_g[fclass_idx];
@@ -1258,12 +1270,13 @@ H5Z_pipeline(const H5O_pline_t *pline, unsigned flags,
 #ifdef H5Z_DEBUG
             H5_timer_end (&(fstats->stats[1].timer), &timer);
             fstats->stats[1].total += MAX(*nbytes, new_nbytes);
-            if (0 == new_nbytes) fstats->stats[1].errors += *nbytes;
+            if (0 == new_nbytes)
+                fstats->stats[1].errors += *nbytes;
 #endif
 
             if (0 == new_nbytes) {
-                if ((cb_struct.func && (H5Z_CB_FAIL == cb_struct.func (pline->filter[idx].id, *buf, *buf_size, cb_struct.op_data))) || !cb_struct.func)
-                    HGOTO_ERROR (H5E_PLINE, H5E_READERROR, FAIL, "filter returned failure during read")
+                if ((cb_struct.func && (H5Z_CB_FAIL == cb_struct.func(pline->filter[idx].id, *buf, *buf_size, cb_struct.op_data))) || !cb_struct.func)
+                    HGOTO_ERROR(H5E_PLINE, H5E_READERROR, FAIL, "filter returned failure during read")
 
                 *nbytes = *buf_size;
                 failed |= (unsigned)1 << idx;
@@ -1298,12 +1311,13 @@ H5Z_pipeline(const H5O_pline_t *pline, unsigned flags,
 #ifdef H5Z_DEBUG
             H5_timer_end (&(fstats->stats[0].timer), &timer);
             fstats->stats[0].total += MAX(*nbytes, new_nbytes);
-            if (0 == new_nbytes) fstats->stats[0].errors += *nbytes;
+            if (0 == new_nbytes)
+                fstats->stats[0].errors += *nbytes;
 #endif
             if (0 == new_nbytes) {
                 if (0 == (pline->filter[idx].flags & H5Z_FLAG_OPTIONAL)) {
                     if ((cb_struct.func && (H5Z_CB_FAIL == cb_struct.func (pline->filter[idx].id, *buf, *nbytes, cb_struct.op_data))) || !cb_struct.func)
-                        HGOTO_ERROR (H5E_PLINE, H5E_WRITEERROR, FAIL, "filter returned failure")
+                        HGOTO_ERROR(H5E_PLINE, H5E_WRITEERROR, FAIL, "filter returned failure")
 
                     *nbytes = *buf_size;
                 }
@@ -1340,8 +1354,8 @@ H5Z_filter_info(const H5O_pline_t *pline, H5Z_filter_t filter)
 
     FUNC_ENTER_NOAPI(NULL)
 
-    HDassert (pline);
-    HDassert (filter >= 0 && filter <= H5Z_FILTER_MAX);
+    HDassert(pline);
+    HDassert(filter >= 0 && filter <= H5Z_FILTER_MAX);
 
     /* Locate the filter in the pipeline */
     for (idx = 0; idx < pline->nused; idx++)
@@ -1350,7 +1364,7 @@ H5Z_filter_info(const H5O_pline_t *pline, H5Z_filter_t filter)
 
     /* Check if the filter was not already in the pipeline */
     if (idx >= pline->nused)
-        HGOTO_ERROR (H5E_PLINE, H5E_NOTFOUND, NULL, "filter not in pipeline")
+        HGOTO_ERROR(H5E_PLINE, H5E_NOTFOUND, NULL, "filter not in pipeline")
 
     /* Set return value */
     ret_value = &pline->filter[idx];
@@ -1379,8 +1393,8 @@ H5Z_filter_in_pline(const H5O_pline_t *pline, H5Z_filter_t filter)
 
     FUNC_ENTER_NOAPI(FAIL)
 
-    HDassert (pline);
-    HDassert (filter >= 0 && filter <= H5Z_FILTER_MAX);
+    HDassert(pline);
+    HDassert(filter >= 0 && filter <= H5Z_FILTER_MAX);
 
     /* Locate the filter in the pipeline */
     for (idx = 0; idx < pline->nused; idx++)
@@ -1416,7 +1430,7 @@ H5Z_all_filters_avail(const H5O_pline_t *pline)
     FUNC_ENTER_NOAPI(FAIL)
 
     /* Check args */
-    HDassert (pline);
+    HDassert(pline);
 
     /* Iterate through all the filters in pipeline */
     for (i = 0; i < pline->nused; i++) {
@@ -1427,7 +1441,7 @@ H5Z_all_filters_avail(const H5O_pline_t *pline)
 
         /* Check if we didn't find the filter */
         if (j == H5Z_table_used_g)
-            HGOTO_DONE (FALSE)
+            HGOTO_DONE(FALSE)
     } /* end for */
 
 done:
@@ -1454,8 +1468,8 @@ H5Z_delete(H5O_pline_t *pline, H5Z_filter_t filter)
     FUNC_ENTER_NOAPI(FAIL)
 
     /* Check args */
-    HDassert (pline);
-    HDassert (filter >= 0 && filter <= H5Z_FILTER_MAX);
+    HDassert(pline);
+    HDassert(filter >= 0 && filter <= H5Z_FILTER_MAX);
 
     /* if the pipeline has no filters, just return */
     if (pline->nused == 0)
@@ -1465,7 +1479,7 @@ H5Z_delete(H5O_pline_t *pline, H5Z_filter_t filter)
     if (H5Z_FILTER_ALL == filter) {
         if (H5O_msg_reset(H5O_PLINE_ID, pline) < 0)
             HGOTO_ERROR(H5E_PLINE, H5E_CANTFREE, FAIL, "can't release pipeline info")
-    } /* end if */
+    }
     /* Delete filter */
     else {
         size_t  idx;             /* Index of filter in pipeline */
@@ -1476,19 +1490,19 @@ H5Z_delete(H5O_pline_t *pline, H5Z_filter_t filter)
             if (pline->filter[idx].id == filter) {
                 found = TRUE;
                 break;
-            } /* end if */
+            }
 
         /* filter was not found in the pipeline */
         if (!found)
-            HGOTO_ERROR (H5E_PLINE, H5E_NOTFOUND, FAIL, "filter not in pipeline")
+            HGOTO_ERROR(H5E_PLINE, H5E_NOTFOUND, FAIL, "filter not in pipeline")
 
         /* Free information for deleted filter */
         if (pline->filter[idx].name && pline->filter[idx].name != pline->filter[idx]._name)
-            HDassert ((HDstrlen(pline->filter[idx].name) + 1) > H5Z_COMMON_NAME_LEN);
+            HDassert((HDstrlen(pline->filter[idx].name) + 1) > H5Z_COMMON_NAME_LEN);
         if (pline->filter[idx].name != pline->filter[idx]._name)
             pline->filter[idx].name = (char *)H5MM_xfree(pline->filter[idx].name);
         if (pline->filter[idx].cd_values && pline->filter[idx].cd_values != pline->filter[idx]._cd_values)
-            HDassert (pline->filter[idx].cd_nelmts > H5Z_COMMON_CD_VALUES);
+            HDassert(pline->filter[idx].cd_nelmts > H5Z_COMMON_CD_VALUES);
         if (pline->filter[idx].cd_values != pline->filter[idx]._cd_values)
             pline->filter[idx].cd_values = (unsigned *)H5MM_xfree(pline->filter[idx].cd_values);
 
@@ -1501,8 +1515,8 @@ H5Z_delete(H5O_pline_t *pline, H5Z_filter_t filter)
                     pline->filter[idx].name = pline->filter[idx]._name;
                 if (pline->filter[idx].cd_nelmts <= H5Z_COMMON_CD_VALUES)
                     pline->filter[idx].cd_values = pline->filter[idx]._cd_values;
-            } /* end for */
-        } /* end if */
+            }
+        }
 
         /* Decrement number of used filters */
         pline->nused--;
@@ -1563,7 +1577,7 @@ H5Z_get_filter_info(H5Z_filter_t filter, unsigned int *filter_config_flags)
 
     /* Look up the filter class info */
     if (NULL == (fclass = H5Z_find(filter)))
-        HGOTO_ERROR (H5E_PLINE, H5E_BADVALUE, FAIL, "Filter not defined")
+        HGOTO_ERROR(H5E_PLINE, H5E_BADVALUE, FAIL, "Filter not defined")
 
     /* Set the filter config flags for the application */
     if (filter_config_flags != NULL) {
diff --git a/src/H5Zprivate.h b/src/H5Zprivate.h
index fe182ad..26e35a7 100644
--- a/src/H5Zprivate.h
+++ b/src/H5Zprivate.h
@@ -18,6 +18,9 @@
 #ifndef _H5Zprivate_H
 #define _H5Zprivate_H
 
+/* Early typedefs to avoid circular dependencies */
+typedef struct H5Z_filter_info_t H5Z_filter_info_t;
+
 /* Include package's public header */
 #include "H5Zpublic.h"
 
@@ -49,7 +52,7 @@
 /****************************/
 
 /* Structure to store information about each filter's parameters */
-typedef struct H5Z_filter_info_t {
+struct H5Z_filter_info_t {
     H5Z_filter_t	id;		/*filter identification number	     */
     unsigned		flags;		/*defn and invocation flags	     */
     char		_name[H5Z_COMMON_NAME_LEN];	/*internal filter name		     */
@@ -57,7 +60,7 @@ typedef struct H5Z_filter_info_t {
     size_t		cd_nelmts;	/*number of elements in cd_values[]  */
     unsigned		_cd_values[H5Z_COMMON_CD_VALUES];	/*internal client data values		     */
     unsigned		*cd_values;	/*client data values		     */
-} H5Z_filter_info_t;
+};
 
 /*****************************/
 /* Library-private Variables */
diff --git a/src/H5Zpublic.h b/src/H5Zpublic.h
index f6b313e..fcb2d37 100644
--- a/src/H5Zpublic.h
+++ b/src/H5Zpublic.h
@@ -129,8 +129,8 @@ typedef H5Z_cb_return_t (*H5Z_filter_func_t)(H5Z_filter_t filter, void* buf,
 
 /* Structure for filter callback property */
 typedef struct H5Z_cb_t {
-    H5Z_filter_func_t func;
-    void*              op_data;
+    H5Z_filter_func_t   func;
+    void                *op_data;
 } H5Z_cb_t;
 
 #ifdef __cplusplus
@@ -206,14 +206,14 @@ typedef size_t (*H5Z_func_t)(unsigned int flags, size_t cd_nelmts,
  * contain a pointers to the filter function and timing statistics.
  */
 typedef struct H5Z_class2_t {
-    int version;                /* Version number of the H5Z_class_t struct */
-    H5Z_filter_t id;		/* Filter ID number			     */
-    unsigned encoder_present;   /* Does this filter have an encoder? */
-    unsigned decoder_present;   /* Does this filter have a decoder? */
-    const char	*name;		/* Comment for debugging		     */
-    H5Z_can_apply_func_t can_apply; /* The "can apply" callback for a filter */
-    H5Z_set_local_func_t set_local; /* The "set local" callback for a filter */
-    H5Z_func_t filter;		/* The actual filter function		     */
+    int version;                    /* Version number of the H5Z_class_t struct     */
+    H5Z_filter_t id;                /* Filter ID number                             */
+    unsigned encoder_present;       /* Does this filter have an encoder?            */
+    unsigned decoder_present;       /* Does this filter have a decoder?             */
+    const char	*name;              /* Comment for debugging                        */
+    H5Z_can_apply_func_t can_apply; /* The "can apply" callback for a filter        */
+    H5Z_set_local_func_t set_local; /* The "set local" callback for a filter        */
+    H5Z_func_t filter;              /* The actual filter function                   */
 } H5Z_class2_t;
 
 H5_DLL herr_t H5Zregister(const void *cls);
diff --git a/src/H5Zszip.c b/src/H5Zszip.c
index 769011c..0c60239 100644
--- a/src/H5Zszip.c
+++ b/src/H5Zszip.c
@@ -70,8 +70,6 @@ H5Z_class2_t H5Z_SZIP[1] = {{
  * Programmer:	Quincey Koziol
  *              Monday, April  7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 static htri_t
@@ -86,24 +84,24 @@ H5Z_can_apply_szip(hid_t H5_ATTR_UNUSED dcpl_id, hid_t type_id, hid_t H5_ATTR_UN
 
     /* Get datatype */
     if(NULL == (type = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
 
     /* Get datatype's size, for checking the "bits-per-pixel" */
     if((dtype_size = (8 * H5T_get_size(type))) == 0)
-	HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype size")
+        HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype size")
 
     /* Range check datatype's size */
     if(dtype_size > 32 && dtype_size != 64)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FALSE, "invalid datatype size")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FALSE, "invalid datatype size")
 
     /* Get datatype's endianness order */
     if((dtype_order = H5T_get_order(type)) == H5T_ORDER_ERROR)
-	HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "can't retrieve datatype endianness order")
+        HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "can't retrieve datatype endianness order")
 
     /* Range check datatype's endianness order */
     /* (Note: this may not handle non-atomic datatypes well) */
     if(dtype_order != H5T_ORDER_LE && dtype_order != H5T_ORDER_BE)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FALSE, "invalid datatype endianness order")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FALSE, "invalid datatype endianness order")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -157,19 +155,19 @@ H5Z_set_local_szip(hid_t dcpl_id, hid_t type_id, hid_t space_id)
 
     /* Get datatype */
     if(NULL == (type = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
 
     /* Get the filter's current parameters */
     if(H5P_get_filter_by_id(dcpl_plist, H5Z_FILTER_SZIP, &flags, &cd_nelmts, cd_values, 0, NULL, NULL) < 0)
-	HGOTO_ERROR(H5E_PLINE, H5E_CANTGET, FAIL, "can't get szip parameters")
+        HGOTO_ERROR(H5E_PLINE, H5E_CANTGET, FAIL, "can't get szip parameters")
 
     /* Get datatype's size, for checking the "bits-per-pixel" */
     if((dtype_size = (8 * H5T_get_size(type))) == 0)
-	HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype size");
+        HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype size");
 
     /* Get datatype's precision, in case is less than full bits  */
     if((dtype_precision = H5T_get_precision(type)) == 0)
-	HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype precision");
+        HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype precision");
 
     if(dtype_precision < dtype_size) {
         dtype_offset = H5T_get_offset(type);
@@ -177,9 +175,9 @@ H5Z_set_local_szip(hid_t dcpl_id, hid_t type_id, hid_t space_id)
             dtype_precision = dtype_size;
     } /* end if */
     if(dtype_precision > 24) {
-	if(dtype_precision <= 32)
+        if(dtype_precision <= 32)
             dtype_precision = 32;
-	else if(dtype_precision <= 64)
+        else if(dtype_precision <= 64)
             dtype_precision = 64;
     } /* end if */
 
@@ -227,7 +225,7 @@ H5Z_set_local_szip(hid_t dcpl_id, hid_t type_id, hid_t space_id)
 
     /* Get datatype's endianness order */
     if((dtype_order = H5T_get_order(type)) == H5T_ORDER_ERROR)
-	HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype endianness order")
+        HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype endianness order")
 
     /* Set the correct endianness flag for szip */
     /* (Note: this may not handle non-atomic datatypes well) */
@@ -241,13 +239,17 @@ H5Z_set_local_szip(hid_t dcpl_id, hid_t type_id, hid_t space_id)
             cd_values[H5Z_SZIP_PARM_MASK] |= SZ_MSB_OPTION_MASK;
             break;
 
+        case H5T_ORDER_ERROR:
+        case H5T_ORDER_VAX:
+        case H5T_ORDER_MIXED:
+        case H5T_ORDER_NONE:
         default:
             HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype endianness order")
     } /* end switch */
 
     /* Modify the filter's parameters for this dataset */
     if(H5P_modify_filter(dcpl_plist, H5Z_FILTER_SZIP, flags, H5Z_SZIP_TOTAL_NPARMS, cd_values) < 0)
-	HGOTO_ERROR(H5E_PLINE, H5E_CANTSET, FAIL, "can't set local szip parameters")
+        HGOTO_ERROR(H5E_PLINE, H5E_CANTSET, FAIL, "can't set local szip parameters")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -266,10 +268,6 @@ done:
  * Programmer:	Kent Yang
  *              Tuesday, April 1, 2003
  *
- * Modifications:
- *              Quincey Koziol, April 2, 2003
- *              Cleaned up code.
- *
  *-------------------------------------------------------------------------
  */
 static size_t
@@ -296,7 +294,7 @@ H5Z_filter_szip (unsigned flags, size_t cd_nelmts, const unsigned cd_values[],
 
     /* Check arguments */
     if (cd_nelmts!=4)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, 0, "invalid number of filter parameters")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, 0, "invalid number of filter parameters")
 
     /* Copy the filter parameters into the szip parameter block */
     H5_CHECKED_ASSIGN(sz_param.options_mask, int, cd_values[H5Z_SZIP_PARM_MASK], unsigned);
@@ -310,12 +308,12 @@ H5Z_filter_szip (unsigned flags, size_t cd_nelmts, const unsigned cd_values[],
         size_t nalloc;  /* Number of bytes the compressed block will expand into */
 
         /* Get the size of the uncompressed buffer */
-        newbuf = *buf;
+        newbuf = (unsigned char *)(*buf);
         UINT32DECODE(newbuf,stored_nalloc);
         H5_CHECKED_ASSIGN(nalloc, size_t, stored_nalloc, uint32_t);
 
         /* Allocate space for the uncompressed buffer */
-        if(NULL==(outbuf = H5MM_malloc(nalloc)))
+        if(NULL == (outbuf = (unsigned char *)H5MM_malloc(nalloc)))
             HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, 0, "memory allocation failed for szip decompression")
 
         /* Decompress the buffer */
@@ -338,7 +336,7 @@ H5Z_filter_szip (unsigned flags, size_t cd_nelmts, const unsigned cd_values[],
         unsigned char *dst = NULL;    /* Temporary pointer to new output buffer */
 
         /* Allocate space for the compressed buffer & header (assume data won't get bigger) */
-        if(NULL==(dst=outbuf = H5MM_malloc(nbytes+4)))
+        if(NULL == (dst=outbuf = (unsigned char *)H5MM_malloc(nbytes+4)))
             HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, 0, "unable to allocate szip destination buffer")
 
         /* Encode the uncompressed length */
@@ -348,7 +346,7 @@ H5Z_filter_szip (unsigned flags, size_t cd_nelmts, const unsigned cd_values[],
         /* Compress the buffer */
         size_out = nbytes;
         if(SZ_OK!= SZ_BufftoBuffCompress(dst, &size_out, *buf, nbytes, &sz_param))
-	    HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, 0, "overflow")
+            HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, 0, "overflow")
         HDassert(size_out<=nbytes);
 
         /* Free the input buffer */
diff --git a/src/H5system.c b/src/H5system.c
index a1cdf19..a8726c2 100644
--- a/src/H5system.c
+++ b/src/H5system.c
@@ -977,7 +977,7 @@ Wround(double arg)
 float
 Wroundf(float arg)
 {
-    return arg < 0.0F ? HDceil(arg - 0.5F) : HDfloor(arg + 0.5F);
+    return (float)(arg < 0.0F ? HDceil(arg - 0.5F) : HDfloor(arg + 0.5F));
 }
 
 #endif /* H5_HAVE_WIN32_API */
diff --git a/src/Makefile.am b/src/Makefile.am
index 9a64717..d8d2cc2 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -84,7 +84,7 @@ libhdf5_la_SOURCES= H5.c H5checksum.c H5dbg.c H5system.c H5timer.c H5trace.c \
         H5Ochunk.c \
         H5Ocont.c H5Ocopy.c H5Odbg.c H5Odrvinfo.c H5Odtype.c H5Oefl.c \
         H5Ofill.c H5Oflush.c H5Ofsinfo.c H5Oginfo.c \
-        H5Olayout.c \
+        H5Oint.c H5Olayout.c \
         H5Olinfo.c H5Olink.c H5Omessage.c H5Omtime.c \
         H5Oname.c H5Onull.c H5Opline.c H5Orefcount.c \
         H5Osdspace.c H5Oshared.c \
@@ -98,7 +98,7 @@ libhdf5_la_SOURCES= H5.c H5checksum.c H5dbg.c H5system.c H5timer.c H5trace.c \
         H5Plapl.c H5Plcpl.c H5Pocpl.c H5Pocpypl.c H5Pstrcpl.c H5Ptest.c \
         H5PB.c \
         H5PL.c H5PLint.c H5PLpath.c H5PLplugin_cache.c \
-        H5R.c H5Rdeprec.c \
+        H5R.c H5Rint.c H5Rdeprec.c \
         H5UC.c \
         H5RS.c \
         H5S.c H5Sall.c H5Sdbg.c H5Shyper.c H5Snone.c H5Spoint.c \
diff --git a/src/libhdf5.settings.in b/src/libhdf5.settings.in
index 8017594..51b24dc 100644
--- a/src/libhdf5.settings.in
+++ b/src/libhdf5.settings.in
@@ -28,6 +28,7 @@ Linking Options:
                      AM_LDFLAGS: @AM_LDFLAGS@
                 Extra libraries: @LIBS@
                        Archiver: @AR@
+                       AR_FLAGS: @AR_FLAGS@
                          Ranlib: @RANLIB@
 
 Languages: