Added a test for VFD IDs to testhdf5.

This required adding some code to generate a fake VFD class
to pass to H5FDregister().

Also, a bunch of whitespace and comment tidying.

5 files changed, 226 insertions, 257 deletions

diff --git a/src/H5FD.c b/src/H5FD.c
index 67cf963..9f62065 100644
--- a/src/H5FD.c
+++ b/src/H5FD.c
@@ -12,14 +12,11 @@
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
- * Programmer:  Robb Matzke <matzke@llnl.gov>
- *              Monday, July 26, 1999
- *
- * Purpose:	The Virtual File Layer as described in documentation.
- *              This is the greatest common denominator for all types of
- *              storage access whether a file, memory, network, etc. This
- *              layer usually just dispatches the request to an actual
- *              file driver layer.
+ * Purpose: The Virtual File Layer as described in documentation.
+ *          This is the greatest common denominator for all types of
+ *          storage access whether a file, memory, network, etc. This
+ *          layer usually just dispatches the request to an actual
+ *          file driver layer.
  */
 
 /****************/
@@ -112,9 +109,6 @@ static const H5I_class_t H5I_VFL_CLS[1] = {{
  * Return:	Success:	Non-negative
  *		Failure:	Negative
  *
- * Programmer:	Robb Matzke
- *              Monday, July 26, 1999
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -147,9 +141,6 @@ done:
  *				otherwise.
  *		Failure:        Never fails.
  *
- * Programmer:	Robb Matzke
- *              Friday, February 19, 1999
- *
  *-------------------------------------------------------------------------
  */
 int
@@ -189,11 +180,6 @@ H5FD_term_package(void)
  *
  *		Failure:	Negative
  *
- * Programmer:	Robb Matzke
- *              Monday, July 26, 1999
- *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 static herr_t
@@ -221,26 +207,18 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5FDregister
- *
- * Purpose:	Registers a new file driver as a member of the virtual file
- *		driver class.  Certain fields of the class struct are
- *		required and that is checked here so it doesn't have to be
- *		checked every time the field is accessed.
- *
- * Return:	Success:	A file driver ID which is good until the
- *				library is closed or the driver is
- *				unregistered.
+ * Function:    H5FDregister
  *
- *		Failure:	A negative value.
+ * Purpose:     Registers a new file driver as a member of the virtual file
+ *              driver class.  Certain fields of the class struct are
+ *              required and that is checked here so it doesn't have to be
+ *              checked every time the field is accessed.
  *
- * Programmer:	Robb Matzke
- *              Monday, July 26, 1999
+ * Return:      Success:    A file driver ID which is good until the
+ *                          library is closed or the driver is
+ *                          unregistered.
  *
- * Modifications:
- *              Copied guts of function into H5FD_register
- *              Quincey Koziol
- *              Friday, January 30, 2004
+ *              Failure:    A negative value.
  *
  *-------------------------------------------------------------------------
  */
@@ -255,18 +233,18 @@ H5FDregister(const H5FD_class_t *cls)
 
     /* Check arguments */
     if(!cls)
-	HGOTO_ERROR(H5E_ARGS, H5E_UNINITIALIZED, FAIL, "null class pointer is disallowed")
+        HGOTO_ERROR(H5E_ARGS, H5E_UNINITIALIZED, FAIL, "null class pointer is disallowed")
     if(!cls->open || !cls->close)
-	HGOTO_ERROR(H5E_ARGS, H5E_UNINITIALIZED, FAIL, "`open' and/or `close' methods are not defined")
+        HGOTO_ERROR(H5E_ARGS, H5E_UNINITIALIZED, FAIL, "`open' and/or `close' methods are not defined")
     if(!cls->get_eoa || !cls->set_eoa)
-	HGOTO_ERROR(H5E_ARGS, H5E_UNINITIALIZED, FAIL, "`get_eoa' and/or `set_eoa' methods are not defined")
+        HGOTO_ERROR(H5E_ARGS, H5E_UNINITIALIZED, FAIL, "`get_eoa' and/or `set_eoa' methods are not defined")
     if(!cls->get_eof)
-	HGOTO_ERROR(H5E_ARGS, H5E_UNINITIALIZED, FAIL, "`get_eof' method is not defined")
+        HGOTO_ERROR(H5E_ARGS, H5E_UNINITIALIZED, FAIL, "`get_eof' method is not defined")
     if(!cls->read || !cls->write)
-	HGOTO_ERROR(H5E_ARGS, H5E_UNINITIALIZED, FAIL, "`read' and/or `write' method is not defined")
-    for (type=H5FD_MEM_DEFAULT; type<H5FD_MEM_NTYPES; H5_INC_ENUM(H5FD_mem_t,type))
-	if(cls->fl_map[type]<H5FD_MEM_NOLIST || cls->fl_map[type]>=H5FD_MEM_NTYPES)
-	    HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid free-list mapping")
+        HGOTO_ERROR(H5E_ARGS, H5E_UNINITIALIZED, FAIL, "`read' and/or `write' method is not defined")
+    for (type = H5FD_MEM_DEFAULT; type < H5FD_MEM_NTYPES; H5_INC_ENUM(H5FD_mem_t,type))
+        if(cls->fl_map[type] < H5FD_MEM_NOLIST || cls->fl_map[type] >= H5FD_MEM_NTYPES)
+            HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid free-list mapping")
 
     /* Create the new class ID */
     if((ret_value=H5FD_register(cls, sizeof(H5FD_class_t), TRUE)) < 0)
@@ -278,29 +256,18 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5FD_register
- *
- * Purpose:	Registers a new file driver as a member of the virtual file
- *		driver class.  Certain fields of the class struct are
- *		required and that is checked here so it doesn't have to be
- *		checked every time the field is accessed.
- *
- * Return:	Success:	A file driver ID which is good until the
- *				library is closed or the driver is
- *				unregistered.
+ * Function:    H5FD_register
  *
- *		Failure:	A negative value.
+ * Purpose:     Registers a new file driver as a member of the virtual file
+ *              driver class.  Certain fields of the class struct are
+ *              required and that is checked here so it doesn't have to be
+ *              checked every time the field is accessed.
  *
- * Programmer:	Robb Matzke
- *              Monday, July 26, 1999
+ * Return:      Success:    A file driver ID which is good until the
+ *                          library is closed or the driver is
+ *                          unregistered.
  *
- * Modifications:
- *              Broke into public and internal routines & added 'size'
- *              parameter to internal routine, which allows us to create
- *              sub-classes of H5FD_class_t for internal support (see the
- *              MPI drivers, etc.)
- *              Quincey Koziol
- *              January 30, 2004
+ *              Failure:    A negative value.
  *
  *-------------------------------------------------------------------------
  */
@@ -325,7 +292,7 @@ H5FD_register(const void *_cls, size_t size, hbool_t app_ref)
 
     /* Copy the class structure so the caller can reuse or free it */
     if(NULL == (saved = (H5FD_class_t *)H5MM_malloc(size)))
-	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for file driver class struct")
+        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for file driver class struct")
     HDmemcpy(saved, cls, size);
 
     /* Create the new class ID */
@@ -342,19 +309,16 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5FDunregister
- *
- * Purpose:	Removes a driver ID from the library. This in no way affects
- *		file access property lists which have been defined to use
- *		this driver or files which are already opened under this
- *		driver.
+ * Function:    H5FDunregister
  *
- * Return:	Success:	Non-negative
+ * Purpose:     Removes a driver ID from the library. This in no way affects
+ *              file access property lists which have been defined to use
+ *              this driver or files which are already opened under this
+ *              driver.
  *
- *		Failure:	Negative
+ * Return:      Success:    Non-negative
  *
- * Programmer:	Robb Matzke
- *              Monday, July 26, 1999
+ *              Failure:    Negative
  *
  *-------------------------------------------------------------------------
  */
@@ -394,9 +358,6 @@ done:
  *
  *		Failure:	NULL
  *
- * Programmer:	Robb Matzke
- *              Friday, August 20, 1999
- *
  *-------------------------------------------------------------------------
  */
 H5FD_class_t *
@@ -442,11 +403,6 @@ done:
  *		Failure:	0 if an error occurs or if the driver has no
  *				data to store in the superblock.
  *
- * Programmer:	Robb Matzke
- *              Monday, August 16, 1999
- *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 hsize_t
@@ -480,11 +436,6 @@ done:
  *
  *		Failure:	Negative
  *
- * Programmer:	Robb Matzke
- *              Monday, August 16, 1999
- *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -511,9 +462,6 @@ done:
  * Return:	Success:	Non-negative
  *		Failure:	Negative
  *
- * Programmer:	Robb Matzke
- *              Monday, August 16, 1999
- *
  *-------------------------------------------------------------------------
  */
 static herr_t
@@ -542,9 +490,6 @@ done:
  * Return:	Success:	Non-negative
  *		Failure:	Negative
  *
- * Programmer:	Quincey Koziol
- *              Friday, July 19, 2013
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -592,9 +537,6 @@ done:
  *		Failure:	NULL, including when the file has no
  *				properties.
  *
- * Programmer:	Robb Matzke
- *              Friday, August 13, 1999
- *
  *-------------------------------------------------------------------------
  */
 void *
@@ -622,9 +564,6 @@ done:
  * Return:	Success:	non-negative
  *		Failure:	negative
  *
- * Programmer:	Robb Matzke
- *              Tuesday, August  3, 1999
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -706,11 +645,6 @@ done:
  *
  *		Failure:	NULL
  *
- * Programmer:	Robb Matzke
- *              Tuesday, July 27, 1999
- *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 H5FD_t *
@@ -745,16 +679,6 @@ done:
  *
  *		Failure:	NULL
  *
- * Programmer:	Robb Matzke
- *              Wednesday, August  4, 1999
- *
- * Modifications:
- *
- *		Raymond Lu
- * 		Tuesday, Oct 23, 2001
- *		Changed the file access list to the new generic property
- *		list.
- *
  *-------------------------------------------------------------------------
  */
 H5FD_t *
@@ -861,9 +785,6 @@ done:
  * Return:	Success:	Non-negative
  *		Failure:	Negative
  *
- * Programmer:	Robb Matzke
- *              Tuesday, July 27, 1999
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -893,9 +814,6 @@ done:
  * Return:	Success:	Non-negative
  *		Failure:	Negative
  *
- * Programmer:	Robb Matzke
- *              Wednesday, August  4, 1999
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -944,11 +862,6 @@ done:
  *				comparison callback then the file pointers
  *				themselves are compared.
  *
- * Programmer:	Robb Matzke
- *              Tuesday, July 27, 1999
- *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 int
@@ -975,11 +888,6 @@ done:
  *
  *		Failure:	Must never fail.
  *
- * Programmer:	Robb Matzke
- *              Wednesday, August  4, 1999
- *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 int
@@ -1025,11 +933,6 @@ done:
  *
  *		Failure:	negative
  *
- * Programmer:	Quincey Koziol
- *              Friday, August 25, 2000
- *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 int
@@ -1059,9 +962,6 @@ done:
  *
  *		Failure:	negative
  *
- * Programmer:	Quincey Koziol
- *              Friday, August 25, 2000
- *
  *-------------------------------------------------------------------------
  */
 static int
@@ -1118,9 +1018,6 @@ H5FD_query(const H5FD_t *f, unsigned long *flags/*out*/)
  *
  *		Failure:	The undefined address HADDR_UNDEF
  *
- * Programmer:	Robb Matzke
- *              Tuesday, July 27, 1999
- *
  *-------------------------------------------------------------------------
  */
 haddr_t
@@ -1170,11 +1067,6 @@ done:
  *
  *		Failure:	Negative
  *
- * Programmer:	Robb Matzke
- *              Wednesday, July 28, 1999
- *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1207,16 +1099,13 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5FDget_eoa
- *
- * Purpose:	Returns the address of the first byte after the last
- *		allocated memory in the file.
+ * Function:    H5FDget_eoa
  *
- * Return:	Success:	First byte after allocated memory.
- *		Failure:	HADDR_UNDEF
+ * Purpose:     Returns the address of the first byte after the last
+ *              allocated memory in the file.
  *
- * Programmer:	Robb Matzke
- *              Friday, July 30, 1999
+ * Return:      Success:    First byte after allocated memory.
+ *              Failure:    HADDR_UNDEF
  *
  *-------------------------------------------------------------------------
  */
@@ -1230,13 +1119,13 @@ H5FDget_eoa(H5FD_t *file, H5FD_mem_t type)
 
     /* Check args */
     if(!file || !file->cls)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, HADDR_UNDEF, "invalid file pointer")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, HADDR_UNDEF, "invalid file pointer")
     if(type < H5FD_MEM_DEFAULT || type >= H5FD_MEM_NTYPES)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, HADDR_UNDEF, "invalid file type")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, HADDR_UNDEF, "invalid file type")
 
     /* The real work */
     if(HADDR_UNDEF == (ret_value = H5FD_get_eoa(file, type)))
-	HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, HADDR_UNDEF, "file get eoa request failed")
+        HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, HADDR_UNDEF, "file get eoa request failed")
 
     /* (Note compensating for base address subtraction in internal routine) */
     ret_value += file->base_addr;
@@ -1265,9 +1154,6 @@ done:
  * Return:	Success:	Non-negative
  *		Failure:	Negative, no side effect
  *
- * Programmer:	Robb Matzke
- *              Friday, July 30, 1999
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1280,16 +1166,16 @@ H5FDset_eoa(H5FD_t *file, H5FD_mem_t type, haddr_t addr)
 
     /* Check args */
     if(!file || !file->cls)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid file pointer")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid file pointer")
     if(type < H5FD_MEM_DEFAULT || type >= H5FD_MEM_NTYPES)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid file type")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid file type")
     if(!H5F_addr_defined(addr) || addr > file->maxaddr)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid end-of-address value")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid end-of-address value")
 
     /* The real work */
     /* (Note compensating for base address addition in internal routine) */
     if(H5FD_set_eoa(file, type, addr - file->base_addr) < 0)
-	HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, FAIL, "file set eoa request failed")
+        HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, FAIL, "file set eoa request failed")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -1315,11 +1201,6 @@ done:
  *
  *		Failure:	HADDR_UNDEF
  *
- * Programmer:	Robb Matzke
- *              Thursday, July 29, 1999
- *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 haddr_t
@@ -1332,11 +1213,11 @@ H5FDget_eof(H5FD_t *file, H5FD_mem_t type)
 
     /* Check arguments */
     if(!file || !file->cls)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, HADDR_UNDEF, "invalid file pointer")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, HADDR_UNDEF, "invalid file pointer")
 
     /* The real work */
     if(HADDR_UNDEF == (ret_value = H5FD_get_eof(file, type)))
-	HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, HADDR_UNDEF, "file get eof request failed")
+        HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, HADDR_UNDEF, "file get eof request failed")
 
     /* (Note compensating for base address subtraction in internal routine) */
     ret_value += file->base_addr;
@@ -1354,9 +1235,6 @@ done:
  * Return:	Success:	The maximum address allowed in the file.
  *		Failure:	HADDR_UNDEF
  *
- * Programmer:	Quincey Koziol
- *              Thursday, January  3, 2008
- *
  *-------------------------------------------------------------------------
  */
 haddr_t
@@ -1384,9 +1262,6 @@ done:
  * Return:	Success:	Non-negative
  *		Failure:	Negative
  *
- * Programmer:	Quincey Koziol
- *              Tuesday, January  8, 2008
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1412,8 +1287,6 @@ H5FD_get_feature_flags(const H5FD_t *file, unsigned long *feature_flags)
  * Return:	Success:	Non-negative
  *		Failure:	Negative
  *
- * Programmer:	Vailin Choi; Oct 2013
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1438,9 +1311,6 @@ H5FD_set_feature_flags(H5FD_t *file, unsigned long feature_flags)
  * Return:	Success:	Non-negative
  *		Failure:	Negative
  *
- * Programmer:	Quincey Koziol
- *              Thursday, January 17, 2008
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1483,9 +1353,6 @@ done:
  *
  *		Failure:	Negative. The contents of BUF is undefined.
  *
- * Programmer:	Robb Matzke
- *              Thursday, July 29, 1999
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1548,9 +1415,6 @@ done:
  *
  *		Failure:	Negative
  *
- * Programmer:	Robb Matzke
- *              Thursday, July 29, 1999
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1613,10 +1477,6 @@ done:
  * Programmer:	Robb Matzke
  *              Thursday, July 29, 1999
  *
- * Modifications:
- *              Quincey Koziol, May 20, 2002
- *              Added 'closing' parameter
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1653,9 +1513,6 @@ done:
  * Return:	Success:	Non-negative
  *		Failure:	Negative
  *
- * Programmer:	Robb Matzke
- *              Wednesday, August  4, 1999
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1683,9 +1540,6 @@ done:
  * Return:	Success:	Non-negative
  *		Failure:	Negative
  *
- * Programmer:	Quincey Koziol
- *              Thursday, January 31, 2008
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1722,9 +1576,6 @@ done:
  * Return:	Success:	Non-negative
  *		Failure:	Negative
  *
- * Programmer:	Quincey Koziol
- *              Thursday, January 31, 2008
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1752,8 +1603,6 @@ done:
  * Return:	Success:	Non-negative
  *		Failure:	Negative
  *
- * Programmer:	Vailin Choi; March 2015
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1786,8 +1635,6 @@ done:
  * Return:	Success:	Non-negative
  *		Failure:	Negative
  *
- * Programmer:	Vailin Choi; May 2013
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1815,8 +1662,6 @@ done:
  * Return:	Success:	Non-negative
  *		Failure:	Negative
  *
- * Programmer:	Vailin Choi; March 2015
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1848,8 +1693,6 @@ done:
  * Return:	Success:	Non-negative
  *		Failure:	Negative
  *
- * Programmer:	Vailin Choi; May 2013
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1878,9 +1721,6 @@ done:
  *
  * Return:	Non-negative on success/Negative on failure
  *
- * Programmer:	Quincey Koziol <koziol@ncsa.uiuc.edu>
- *		March 27, 2002
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1909,8 +1749,6 @@ H5FD_get_fileno(const H5FD_t *file, unsigned long *filenum)
  * Programmer:  Raymond Lu
  *              Sep. 16, 2002
  *
- * Modifications:
- *
  *--------------------------------------------------------------------------
  */
 herr_t
@@ -1972,9 +1810,6 @@ done:
  *
  * Return:      Non-negative if succeed; negative if fails.
  *
- * Programmer:  Quincey Koziol
- *              Jan. 17, 2008
- *
  *--------------------------------------------------------------------------
  */
 herr_t
@@ -2000,9 +1835,6 @@ H5FD_set_base_addr(H5FD_t *file, haddr_t base_addr)
  * Return:	Success:	The absolute base address of the file
  *		Failure:	The undefined address (HADDR_UNDEF)
  *
- * Programmer:  Quincey Koziol
- *              Sept. 10, 2009
- *
  *--------------------------------------------------------------------------
  */
 haddr_t
@@ -2024,8 +1856,6 @@ H5FD_get_base_addr(const H5FD_t *file)
  *
  * Return:      Non-negative if succeed; negative if fails.
  *
- * Programmer:  Vailin Choi; April 2013
- *
  *--------------------------------------------------------------------------
  */
 herr_t
@@ -2052,9 +1882,6 @@ H5FD_set_paged_aggr(H5FD_t *file, hbool_t paged)
 *
 * Return:   SUCCEED/FAIL
 *
-* Programmer:  Jacob Gruber
-*              Wednesday, August 17, 2011
-*
 *-------------------------------------------------------------------------
 */
 herr_t
diff --git a/src/H5Ipublic.h b/src/H5Ipublic.h
index 896f82f..831874b 100644
--- a/src/H5Ipublic.h
+++ b/src/H5Ipublic.h
@@ -28,26 +28,26 @@
  * fail otherwise).
  *
  * When adding types here, add a section to the 'misc19' test in test/tmisc.c
- * to verify that the H5I{inc|dec|get}_ref() routines work correctly with in.
+ * to verify that the H5I{inc|dec|get}_ref() routines work correctly with it.
  *
  */
 typedef enum H5I_type_t {
-    H5I_UNINIT		= (-2), /*uninitialized type			    */
-    H5I_BADID		= (-1),	/*invalid Type				    */
-    H5I_FILE            = 1,  	/*type ID for File objects      	    */
-    H5I_GROUP,	                /*type ID for Group objects     	    */
-    H5I_DATATYPE,	        /*type ID for Datatype objects		    */
-    H5I_DATASPACE,	        /*type ID for Dataspace objects		    */
-    H5I_DATASET,	        /*type ID for Dataset objects		    */
-    H5I_ATTR,		        /*type ID for Attribute objects		    */
-    H5I_REFERENCE,	        /*type ID for Reference objects		    */
-    H5I_VFL,			/*type ID for virtual file layer	    */
-    H5I_GENPROP_CLS,            /*type ID for generic property list classes */
-    H5I_GENPROP_LST,            /*type ID for generic property lists        */
-    H5I_ERROR_CLASS,            /*type ID for error classes		    */
-    H5I_ERROR_MSG,              /*type ID for error messages		    */
-    H5I_ERROR_STACK,            /*type ID for error stacks		    */
-    H5I_NTYPES		        /*number of library types, MUST BE LAST!    */
+    H5I_UNINIT      = (-2),     /* uninitialized type                           */
+    H5I_BADID       = (-1),     /* invalid Type                                 */
+    H5I_FILE        = 1,        /* type ID for File objects                     */
+    H5I_GROUP,                  /* type ID for Group objects                    */
+    H5I_DATATYPE,               /* type ID for Datatype objects                 */
+    H5I_DATASPACE,              /* type ID for Dataspace objects                */
+    H5I_DATASET,                /* type ID for Dataset objects                  */
+    H5I_ATTR,                   /* type ID for Attribute objects                */
+    H5I_REFERENCE,              /* type ID for Reference objects                */
+    H5I_VFL,                    /* type ID for virtual file layer               */
+    H5I_GENPROP_CLS,            /* type ID for generic property list classes    */
+    H5I_GENPROP_LST,            /* type ID for generic property lists           */
+    H5I_ERROR_CLASS,            /* type ID for error classes                    */
+    H5I_ERROR_MSG,              /* type ID for error messages                   */
+    H5I_ERROR_STACK,            /* type ID for error stacks                     */
+    H5I_NTYPES                  /* number of library types, MUST BE LAST!       */
 } H5I_type_t;
 
 /* Type of atoms to return to users */
diff --git a/test/h5test.c b/test/h5test.c
index 8db4388..af45589 100644
--- a/test/h5test.c
+++ b/test/h5test.c
@@ -104,6 +104,68 @@ static herr_t h5_errors(hid_t estack, void *client_data);
 static char * h5_fixname_real(const char *base_name, hid_t fapl, const char *suffix, 
                               char *fullname, size_t size, hbool_t nest_printf);
 
+
+
+/* A non-usable VFD class and its functions.
+ *
+ * Usable for testing things like ID handling where we shouldn't mess with the real VFDs.
+ */
+static H5FD_t *dummy_vfd_open(const char *name, unsigned flags, hid_t fapl_id, haddr_t maxaddr);
+static H5FD_t *dummy_vfd_open(const char H5_ATTR_UNUSED *name, unsigned H5_ATTR_UNUSED flags, hid_t H5_ATTR_UNUSED fapl_id, haddr_t H5_ATTR_UNUSED maxaddr) { return NULL; }
+
+static herr_t dummy_vfd_close(H5FD_t *_file);
+static herr_t dummy_vfd_close(H5FD_t H5_ATTR_UNUSED *_file) { return FAIL; }
+
+static haddr_t dummy_vfd_get_eoa(const H5FD_t *file, H5FD_mem_t type);
+static haddr_t dummy_vfd_get_eoa(const H5FD_t H5_ATTR_UNUSED *file, H5FD_mem_t H5_ATTR_UNUSED type) { return HADDR_UNDEF; }
+
+static herr_t dummy_vfd_set_eoa(H5FD_t *_file, H5FD_mem_t type, haddr_t addr);
+static herr_t dummy_vfd_set_eoa(H5FD_t H5_ATTR_UNUSED *_file, H5FD_mem_t H5_ATTR_UNUSED type, haddr_t H5_ATTR_UNUSED addr) { return FAIL; }
+
+static haddr_t dummy_vfd_get_eof(const H5FD_t *file, H5FD_mem_t type);
+static haddr_t dummy_vfd_get_eof(const H5FD_t H5_ATTR_UNUSED *file, H5FD_mem_t H5_ATTR_UNUSED type) { return HADDR_UNDEF; }
+
+static herr_t dummy_vfd_read(H5FD_t *_file, H5FD_mem_t type, hid_t fapl_id, haddr_t addr, size_t size, void *buf);
+static herr_t dummy_vfd_read(H5FD_t H5_ATTR_UNUSED *_file, H5FD_mem_t H5_ATTR_UNUSED type, hid_t H5_ATTR_UNUSED fapl_id, haddr_t H5_ATTR_UNUSED addr, size_t H5_ATTR_UNUSED size, void H5_ATTR_UNUSED *buf) { return FAIL; }
+
+static herr_t dummy_vfd_write(H5FD_t *_file, H5FD_mem_t type, hid_t fapl_id, haddr_t addr, size_t size, const void *buf);
+static herr_t dummy_vfd_write(H5FD_t H5_ATTR_UNUSED *_file, H5FD_mem_t H5_ATTR_UNUSED type, hid_t H5_ATTR_UNUSED fapl_id, haddr_t H5_ATTR_UNUSED addr, size_t H5_ATTR_UNUSED size, const void H5_ATTR_UNUSED *buf) { return FAIL; }
+
+static H5FD_class_t dummy_vfd_class_g = {
+    "fake",                     /* name                 */
+    1,                          /* maxaddr              */
+    H5F_CLOSE_WEAK,             /* fc_degree            */
+    NULL,                       /* terminate            */
+    NULL,                       /* sb_size              */
+    NULL,                       /* sb_encode            */
+    NULL,                       /* sb_decode            */
+    0,                          /* fapl_size            */
+    NULL,                       /* fapl_get             */
+    NULL,                       /* fapl_copy            */
+    NULL,                       /* fapl_free            */
+    0,                          /* dxpl_size            */
+    NULL,                       /* dxpl_copy            */
+    NULL,                       /* dxpl_free            */
+    dummy_vfd_open,             /* open                 */
+    dummy_vfd_close,            /* close                */
+    NULL,                       /* cmp                  */
+    NULL,                       /* query                */
+    NULL,                       /* get_type_map         */
+    NULL,                       /* alloc                */
+    NULL,                       /* free                 */
+    dummy_vfd_get_eoa,          /* get_eoa              */
+    dummy_vfd_set_eoa,          /* set_eoa              */
+    dummy_vfd_get_eof,          /* get_eof              */
+    NULL,                       /* get_handle           */
+    dummy_vfd_read,             /* read                 */
+    dummy_vfd_write,            /* write                */
+    NULL,                       /* flush                */
+    NULL,                       /* truncate             */
+    NULL,                       /* lock                 */
+    NULL,                       /* unlock               */
+    H5FD_FLMAP_DEFAULT          /* fl_map               */
+};
+
 
 /*-------------------------------------------------------------------------
  * Function:  h5_errors
@@ -1828,3 +1890,41 @@ error:
     return FAIL;
 } /* h5_wait_message() */
 
+/*-------------------------------------------------------------------------
+ * Function:    h5_get_dummy_vfd_class()
+ *
+ * Purpose:     Returns a disposable, generally non-functional,
+ *              VFD class struct.
+ *
+ *              In some of the test code, we need a disposable VFD but
+ *              we don't want to mess with the real VFDs and we also
+ *              don't have access to the internals of the real VFDs (which
+ *              use static globals and functions) to easily duplicate
+ *              them (e.g.: for testing VFD ID handling).
+ *
+ *              This API call will return a pointer to a VFD class that
+ *              can be used to construct a test VFD using H5FDregister().
+ *
+ * Return:      Success:    A pointer to a VFD class struct
+ *              Failure:    NULL
+ *
+ *-------------------------------------------------------------------------
+ */
+H5FD_class_t *
+h5_get_dummy_vfd_class(void)
+{
+    H5FD_class_t *vfd_class = NULL;
+
+    if(NULL == (vfd_class = (H5FD_class_t *)HDmalloc(sizeof(H5FD_class_t))))
+        TEST_ERROR;
+
+    HDmemcpy(vfd_class, &dummy_vfd_class_g, sizeof(H5FD_class_t));
+
+    return vfd_class;
+
+error:
+    if(vfd_class)
+        HDfree(vfd_class);
+    return NULL;
+} /* h5_get_dummy_vfd_class */
+
diff --git a/test/h5test.h b/test/h5test.h
index 0e23255..ce5c64d 100644
--- a/test/h5test.h
+++ b/test/h5test.h
@@ -136,6 +136,7 @@ H5TEST_DLL h5_stat_size_t h5_get_file_size(const char *filename, hid_t fapl);
 H5TEST_DLL int print_func(const char *format, ...);
 H5TEST_DLL int h5_make_local_copy(const char *origfilename, const char *local_copy_name);
 H5TEST_DLL herr_t h5_verify_cached_stabs(const char *base_name[], hid_t fapl);
+H5TEST_DLL H5FD_class_t *h5_get_dummy_vfd_class(void);
 
 /* Functions that will replace VFD-dependent functions that violate
  * the single responsibility principle. Unlike their predecessors,
diff --git a/test/tmisc.c b/test/tmisc.c
index dc69e18..cc6a6aa 100644
--- a/test/tmisc.c
+++ b/test/tmisc.c
@@ -29,7 +29,7 @@
 #include "hdf5.h"
 #include "testhdf5.h"
 #include "H5srcdir.h"
-#include "H5Dpkg.h"    /* Datasets         */
+#include "H5Dpkg.h"         /* Datasets                 */
 
 /* Definitions for misc. test #1 */
 #define MISC1_FILE  "tmisc1.h5"
@@ -2984,19 +2984,21 @@ test_misc18(void)
 static void
 test_misc19(void)
 {
-    hid_t fid;          /* File ID */
-    hid_t sid;          /* 'Space ID */
-    hid_t did;          /* Dataset ID */
-    hid_t tid;          /* 'Type ID */
-    hid_t aid;          /* Attribute ID */
-    hid_t plid;         /* Property List ID */
-    hid_t pcid;         /* Property Class ID */
-    hid_t gid;          /* Group ID */
-    hid_t ecid;         /* Error Class ID */
-    hid_t emid;         /* Error Message ID */
-    hid_t esid;         /* Error Stack ID */
-    int rc;             /* Reference count */
-    herr_t ret;         /* Generic return value */
+    hid_t fid = -1;                 /* File ID                  */
+    hid_t sid = -1;                 /* Dataspace ID             */
+    hid_t did = -1;                 /* Dataset ID               */
+    hid_t tid = -1;                 /* Datatype ID              */
+    hid_t aid = -1;                 /* Attribute ID             */
+    hid_t plid = -1;                /* Property List ID         */
+    hid_t pcid = -1;                /* Property Class ID        */
+    hid_t gid = -1;                 /* Group ID                 */
+    hid_t ecid = -1;                /* Error Class ID           */
+    hid_t emid = -1;                /* Error Message ID         */
+    hid_t esid = -1;                /* Error Stack ID           */
+    hid_t vfdid = -1;               /* Virtual File Driver ID   */
+    H5FD_class_t *vfd_cls = NULL;   /* VFD class                */
+    int rc;                         /* Reference count          */
+    herr_t ret;                     /* Generic return value     */
 
 /* Check H5I operations on files */
 
@@ -3406,6 +3408,45 @@ test_misc19(void)
     } H5E_END_TRY;
     VERIFY(ret, FAIL, "H5Eclose_stack");
 
+
+/* Check H5I operations on virtual file drivers */
+
+    /* Get a VFD class to register */
+    vfd_cls = h5_get_dummy_vfd_class();
+    CHECK(vfd_cls, NULL, "h5_get_dummy_vfd_class");
+
+    /* Register a virtual file driver */
+    vfdid = H5FDregister(vfd_cls);
+    CHECK(vfdid, FAIL, "H5FDregister");
+
+    /* Check the reference count */
+    rc = H5Iget_ref(vfdid);
+    VERIFY(rc, 1, "H5Iget_ref");
+
+    /* Increment the reference count */
+    rc = H5Iinc_ref(vfdid);
+    VERIFY(rc, 2, "H5Iinc_ref");
+
+    /* Unregister the VFD normally */
+    ret = H5FDunregister(vfdid);
+    CHECK(ret, FAIL, "H5FDunregister");
+
+    /* Check the reference count */
+    rc = H5Iget_ref(vfdid);
+    VERIFY(rc, 1, "H5Iget_ref");
+
+    /* Unregister the VFD by decrementing the reference count */
+    rc = H5Idec_ref(vfdid);
+    VERIFY(rc, 0, "H5Idec_ref");
+
+    /* Try unregistering the VFD again (should fail) */
+    H5E_BEGIN_TRY {
+        ret = H5FDunregister(vfdid);
+    } H5E_END_TRY;
+    VERIFY(ret, FAIL, "H5FDunregister");
+
+/* Check H5I operations on references */
+
 } /* end test_misc19() */
 
 /****************************************************************