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authorPedro Vicente Nunes <pvn@hdfgroup.org>2009-02-26 20:21:50 (GMT)
committerPedro Vicente Nunes <pvn@hdfgroup.org>2009-02-26 20:21:50 (GMT)
commitf8c5384aa534a60d6e23697d30d9f56c6f0257aa (patch)
treed4d0d6c5603813f857b3c010e2c33332342c671d /tools/h5stat/Makefile.in
parent24341c6eb4bb584583efeb4b7d1592ae7f5f0680 (diff)
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[svn-r16518] have 2 expected outputs for 2 h5ls runs depending if run on a big or little endian machine. Configure.in was modified to export a variable carrying endianess information to testh5ls.sh. This script then compares the current run with 2 expected outputs, one for a big-endian machine (linew was used to generate the output), other for little endian (jam was used to generate the output)
the way h5ls prints types, it starts searching for NATIVE types first. One solution would be h5ls not to detect these native types, using for example the same print datatype function that h5dump does, that would make the output look the same on all platforms ("32-bit little-endian integer" would be printed instead). Drawback, this "native" information would not be available. Other solution is to have not one but 2 expected outputs and make the shell script detect the endianess and compare with one output or other tested: h5committest
Diffstat (limited to 'tools/h5stat/Makefile.in')
-rw-r--r--tools/h5stat/Makefile.in1
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/h5stat/Makefile.in b/tools/h5stat/Makefile.in
index 52c886b..67b1280 100644
--- a/tools/h5stat/Makefile.in
+++ b/tools/h5stat/Makefile.in
@@ -243,6 +243,7 @@ USE_FILTER_SHUFFLE = @USE_FILTER_SHUFFLE@
USE_FILTER_SZIP = @USE_FILTER_SZIP@
USINGMEMCHECKER = @USINGMEMCHECKER@
VERSION = @VERSION@
+WORDS_BIGENDIAN = @WORDS_BIGENDIAN@
abs_builddir = @abs_builddir@
abs_srcdir = @abs_srcdir@
abs_top_builddir = @abs_top_builddir@
generated by cgit v0.12 at 2024-11-06 14:07:00 (GMT)
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by the Board of Trustees of the University of Illinois.         *
 * All rights reserved.                                                      *
 *                                                                           *
 * This file is part of HDF5.  The full HDF5 copyright notice, including     *
 * terms governing use, modification, and redistribution, is contained in    *
 * the files COPYING and Copyright.html.  COPYING can be found at the root   *
 * of the source code distribution tree; Copyright.html can be found at the  *
 * root level of an installed copy of the electronic HDF5 document set and   *
 * is linked from the top-level documents page.  It can also be found at     *
 * http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html.  If you do not have     *
 * access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/*-------------------------------------------------------------------------
 *
 * Created:		H5O.c
 *			Aug  5 1997
 *			Robb Matzke <matzke@llnl.gov>
 *
 * Purpose:		Object header routines.
 *
 *-------------------------------------------------------------------------
 */

/****************/
/* Module Setup */
/****************/

#define H5F_PACKAGE		/*suppress error about including H5Fpkg	  */
#define H5O_PACKAGE		/*suppress error about including H5Opkg	  */

/* Interface initialization */
#define H5_INTERFACE_INIT_FUNC	H5O_init_interface

/***********/
/* Headers */
/***********/
#include "H5private.h"		/* Generic Functions			*/
#include "H5Aprivate.h"		/* Attributes			  	*/
#include "H5Eprivate.h"		/* Error handling		  	*/
#include "H5Fpkg.h"		/* File access				*/
#include "H5FLprivate.h"	/* Free lists                           */
#include "H5Iprivate.h"		/* IDs			  		*/
#include "H5MFprivate.h"	/* File memory management		*/
#include "H5Opkg.h"             /* Object headers			*/
#include "H5SMprivate.h"        /* Shared object header messages        */


/****************/
/* Local Macros */
/****************/


/******************/
/* Local Typedefs */
/******************/


/********************/
/* Package Typedefs */
/********************/


/********************/
/* Local Prototypes */
/********************/

static hid_t H5O_open_by_loc(H5G_loc_t *obj_loc, hid_t dxpl_id);
static herr_t H5O_delete_oh(H5F_t *f, hid_t dxpl_id, H5O_t *oh);
static const H5O_obj_class_t *H5O_obj_class(H5O_loc_t *loc, hid_t dxpl_id);
static herr_t H5O_obj_type_real(H5O_t *oh, H5O_type_t *obj_type);


/*********************/
/* Package Variables */
/*********************/

/* Header message ID to class mapping */
const H5O_msg_class_t *const H5O_msg_class_g[] = {
    H5O_MSG_NULL,		/*0x0000 Null				*/
    H5O_MSG_SDSPACE,		/*0x0001 Simple Dimensionality		*/
    H5O_MSG_LINFO,		/*0x0002 Link information		*/
    H5O_MSG_DTYPE,		/*0x0003 Data Type			*/
    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,		/*0x0009 "Bogus" (for testing)		*/
#else /* H5O_ENABLE_BOGUS */
    NULL,			/*0x0009 "Bogus" (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 list			*/
    H5O_MSG_NAME,		/*0x000D Object name			*/
    H5O_MSG_MTIME,		/*0x000E Object modification date and time */
    NULL,			/*0x000F UNUSED (used to be "Shared"    */
    H5O_MSG_CONT,		/*0x0010 Object header continuation	*/
    H5O_MSG_STAB,		/*0x0011 Symbol table			*/
    H5O_MSG_MTIME_NEW,		/*0x0012 New Object modification date and time */
};

/* 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.
 */
const H5O_obj_class_t *const H5O_obj_class_g[] = {
    H5O_OBJ_DATATYPE,		/* Datatype object (H5G_TYPE - 2) */
    H5O_OBJ_DATASET,		/* Dataset object (H5G_DATASET - 1) */
    H5O_OBJ_GROUP,		/* Group object (H5G_GROUP - 0) */
};

/* 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);


/*****************************/
/* Library Private Variables */
/*****************************/

/* Declare external the free list for time_t's */
H5FL_EXTERN(time_t);


/*******************/
/* Local Variables */
/*******************/



/*-------------------------------------------------------------------------
 * Function:	H5O_init_interface
 *
 * Purpose:	Initialize information specific to H5O interface.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *              Thursday, January 18, 2007
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5O_init_interface(void)
{
    FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5O_init_interface)

    /* H5O interface sanity checks */
    HDassert(H5O_MSG_TYPES == NELMTS(H5O_msg_class_g));
    HDassert(sizeof(H5O_fheap_id_t) == H5O_FHEAP_ID_LEN);

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5O_init_interface() */


/*-------------------------------------------------------------------------
 * Function:	H5Oopen
 *
 * Purpose:	Opens an object within an HDF5 file.
 *
 *              This function opens an object in the same way that H5Gopen,
 *              H5Topen, and H5Dopen do. However, H5Oopen doesn't require
 *              the type of object to be known beforehand. This can be
 *              useful in user-defined links, for instance, when only a
 *              path is known.
 *
 *              The opened object should be closed again with H5Oclose
 *              or H5Gclose, H5Tclose, or H5Dclose.
 *
 * Return:	Success:	An open object identifier
 *		Failure:	Negative
 *
 * Programmer:	James Laird
 *		July 14 2006
 *
 *-------------------------------------------------------------------------
 */
hid_t
H5Oopen(hid_t loc_id, const char *name, hid_t lapl_id)
{
    H5G_loc_t	loc;
    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_API(H5Oopen, FAIL)
    H5TRACE3("i", "isi", loc_id, name, lapl_id);

    /* Check args */
    if(H5G_loc(loc_id, &loc) < 0)
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
    if(!name || !*name)
        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no 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, H5AC_dxpl_id) < 0)
        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "object not found")
    loc_found = TRUE;

    /* Open the object */
    if((ret_value = H5O_open_by_loc(&obj_loc, H5AC_dxpl_id)) < 0)
        HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open object")

done:
    if(ret_value < 0 && loc_found)
        if(H5G_loc_free(&obj_loc) < 0)
            HDONE_ERROR(H5E_SYM, H5E_CANTRELEASE, FAIL, "can't free location")

    FUNC_LEAVE_API(ret_value)
} /* end H5Oopen() */


/*-------------------------------------------------------------------------
 * Function:	H5Oopen_by_idx
 *
 * Purpose:	Opens an object within an HDF5 file, according to the offset
 *              within an index.
 *
 *              This function opens an object in the same way that H5Gopen,
 *              H5Topen, and H5Dopen do. However, H5Oopen doesn't require
 *              the type of object to be known beforehand. This can be
 *              useful in user-defined links, for instance, when only a
 *              path is known.
 *
 *              The opened object should be closed again with H5Oclose
 *              or H5Gclose, H5Tclose, or H5Dclose.
 *
 * Return:	Success:	An open object identifier
 *		Failure:	Negative
 *
 * Programmer:	Quincey Koziol
 *		November 20 2006
 *
 *-------------------------------------------------------------------------
 */
hid_t
H5Oopen_by_idx(hid_t loc_id, const char *group_name, H5_index_t idx_type,
    H5_iter_order_t order, hsize_t n, hid_t lapl_id)
{
    H5G_loc_t	loc;
    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_API(H5Oopen_by_idx, FAIL)
    H5TRACE6("i", "isIiIohi", loc_id, group_name, idx_type, order, n, lapl_id);

    /* Check args */
    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")
    if(idx_type <= H5_INDEX_UNKNOWN || idx_type >= H5_INDEX_N)
	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")
    if(H5P_DEFAULT == lapl_id)
        lapl_id = H5P_LINK_ACCESS_DEFAULT;
    else
        if(TRUE != H5P_isa_class(lapl_id, H5P_LINK_ACCESS))
            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not link access property list ID")

    /* 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, according to the order in the index */
    if(H5G_loc_find_by_idx(&loc, group_name, idx_type, order, n, &obj_loc/*out*/, lapl_id, H5AC_dxpl_id) < 0)
        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "group not found")
    loc_found = TRUE;

    /* Open the object */
    if((ret_value = H5O_open_by_loc(&obj_loc, H5AC_dxpl_id)) < 0)
        HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open object")

done:
    /* Release the object location if we failed after copying it */
    if(ret_value < 0 && loc_found)
        if(H5G_loc_free(&obj_loc) < 0)
            HDONE_ERROR(H5E_SYM, H5E_CANTRELEASE, FAIL, "can't free location")

    FUNC_LEAVE_API(ret_value)
} /* end H5Oopen_by_idx() */


/*-------------------------------------------------------------------------
 * Function:	H5Oopen_by_addr
 *
 * Purpose:	Warning! This function is EXTREMELY DANGEROUS!
 *              Improper use can lead to FILE CORRUPTION, INACCESSIBLE DATA,
 *              and other VERY BAD THINGS!
 *
 *              This function opens an object using its address within the
 *              HDF5 file, similar to an HDF5 hard link. The open object
 *              is identical to an object opened with H5Oopen() and should
 *              be closed with H5Oclose() or a type-specific closing
 *              function (such as H5Gclose() ).
 *
 *              This function is very dangerous if called on an invalid
 *              address. For this reason, H5Oincr_refcount() should be
 *              used to prevent HDF5 from deleting any object that is
 *              referenced by address (e.g. by a user-defined link).
 *              H5Odecr_refcount() should be used when the object is
 *              no longer being referenced by address (e.g. when the UD link
 *              is deleted).
 *         
 *              The address of the HDF5 file on disk has no effect on
 *              H5Oopen_by_addr(), nor does the use of any unusual file
 *              drivers. The "address" is really the offset within the
 *              HDF5 file, and HDF5's file drivers will transparently
 *              map this to an address on disk for the filesystem.
 *
 * Return:	Success:	An open object identifier
 *		Failure:	Negative
 *
 * Programmer:	James Laird
 *		July 14 2006
 *
 *-------------------------------------------------------------------------
 */
hid_t
H5Oopen_by_addr(hid_t loc_id, haddr_t addr)
{
    H5G_loc_t	loc;
    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;      /* Location at 'name' found */
    hid_t       ret_value = FAIL;

    FUNC_ENTER_API(H5Oopen_by_addr, FAIL)
    H5TRACE2("i", "ia", loc_id, addr);

    /* Check args */
    if(H5G_loc(loc_id, &loc) < 0)
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
    if(!H5F_addr_defined(addr))
        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no address supplied")

    /* Set up opened group location to fill in */
    obj_loc.oloc = &obj_oloc;
    obj_loc.path = &obj_path;
    H5G_loc_reset(&obj_loc);
    obj_loc.oloc->addr = addr;
    obj_loc.oloc->file = loc.oloc->file;
    H5G_name_reset(obj_loc.path);       /* objects opened through this routine don't have a path name */

    /* Open the object */
    if((ret_value = H5O_open_by_loc(&obj_loc, H5AC_dxpl_id)) < 0)
        HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open object")

done:
    if(ret_value < 0 && loc_found)
        if(H5G_loc_free(&obj_loc) < 0)
            HDONE_ERROR(H5E_SYM, H5E_CANTRELEASE, FAIL, "can't free location")

    FUNC_LEAVE_API(ret_value)
} /* end H5Oopen_by_addr() */


/*-------------------------------------------------------------------------
 * Function:	H5Oincr_refcount
 *
 * Purpose:	Warning! This function is EXTREMELY DANGEROUS!
 *              Improper use can lead to FILE CORRUPTION, INACCESSIBLE DATA,
 *              and other VERY BAD THINGS!
 *
 *              This function increments the "hard link" reference count
 *              for an object. It should be used when a user-defined link
 *              that references an object by address is created. When the
 *              link is deleted, H5Odecr_refcount should be used.
 *
 * Return:	Success:	Non-negative
 *		Failure:	Negative
 *
 * Programmer:	James Laird
 *		July 14 2006
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5Oincr_refcount(hid_t object_id)
{
    H5O_loc_t  *oloc;
    herr_t      ret_value = SUCCEED;

    FUNC_ENTER_API(H5Oincr_refcount, FAIL)
    H5TRACE1("e", "i", object_id);

    /* Get the object's oloc so we can adjust its link count */
    if((oloc = H5O_get_loc(object_id)) == NULL)
        HGOTO_ERROR(H5E_ATOM, H5E_BADVALUE, FAIL, "unable to get object location from ID")

    if(H5O_link(oloc, 1, H5AC_dxpl_id) < 0)
        HGOTO_ERROR(H5E_OHDR, H5E_LINKCOUNT, FAIL, "modifying object link count failed")

done:
    FUNC_LEAVE_API(ret_value)
} /* end H5O_incr_refcount() */


/*-------------------------------------------------------------------------
 * Function:	H5Odecr_refcount
 *
 * Purpose:	Warning! This function is EXTREMELY DANGEROUS!
 *              Improper use can lead to FILE CORRUPTION, INACCESSIBLE DATA,
 *              and other VERY BAD THINGS!
 *
 *              This function decrements the "hard link" reference count
 *              for an object. It should be used when user-defined links
 *              that reference an object by address are deleted, and only
 *              after H5Oincr_refcount has already been used.
 *
 * Return:	Success:	Non-negative
 *		Failure:	Negative
 *
 * Programmer:	James Laird
 *		July 14 2006
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5Odecr_refcount(hid_t object_id)
{
    H5O_loc_t  *oloc;
    herr_t      ret_value = SUCCEED;

    FUNC_ENTER_API(H5Odecr_refcount, FAIL)
    H5TRACE1("e", "i", object_id);

    /* Get the object's oloc so we can adjust its link count */
    if((oloc = H5O_get_loc(object_id)) == NULL)
        HGOTO_ERROR(H5E_ATOM, H5E_BADVALUE, FAIL, "unable to get object location from ID")

    if(H5O_link(oloc, -1, H5AC_dxpl_id) < 0)
        HGOTO_ERROR(H5E_OHDR, H5E_LINKCOUNT, FAIL, "modifying object link count failed")

done:
    FUNC_LEAVE_API(ret_value)
} /* end H5Odecr_refcount() */


/*-------------------------------------------------------------------------
 * Function:	H5Oget_info
 *
 * Purpose:	Retrieve information about an object.
 *
 * Return:	Success:	Non-negative
 *		Failure:	Negative
 *
 * Programmer:	Quincey Koziol
 *		November 21 2006
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5Oget_info(hid_t loc_id, const char *name, H5O_info_t *oinfo, hid_t lapl_id)
{
    H5G_loc_t	loc;                    /* Location of group */
    herr_t      ret_value = SUCCEED;    /* Return value */

    FUNC_ENTER_API(H5Oget_info, FAIL)

    /* Check args */
    if(H5G_loc(loc_id, &loc) < 0)
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
    if(!name || !*name)
        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name")
    if(!oinfo)
        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no info struct")
    if(H5P_DEFAULT == lapl_id)
        lapl_id = H5P_LINK_ACCESS_DEFAULT;
    else
        if(TRUE != H5P_isa_class(lapl_id, H5P_LINK_ACCESS))
            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not link access property list ID")

    /* Retrieve the object's information */
    if(H5G_loc_info(&loc, name, oinfo/*out*/, lapl_id, H5AC_ind_dxpl_id) < 0)
        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "object not found")

done:
    FUNC_LEAVE_API(ret_value)
} /* end H5Oget_info() */


/*-------------------------------------------------------------------------
 * Function:	H5Oget_info_by_idx
 *
 * Purpose:	Retrieve information about an object, according to the order
 *              of an index.
 *
 * Return:	Success:	Non-negative
 *		Failure:	Negative
 *
 * Programmer:	Quincey Koziol
 *		November 26 2006
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5Oget_info_by_idx(hid_t loc_id, const char *group_name, H5_index_t idx_type,
    H5_iter_order_t order, hsize_t n, H5O_info_t *oinfo, hid_t lapl_id)
{
    H5G_loc_t	loc;                    /* Location of group */
    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 */
    herr_t      ret_value = SUCCEED;    /* Return value */

    FUNC_ENTER_API(H5Oget_info_by_idx, FAIL)

    /* Check args */
    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")
    if(idx_type <= H5_INDEX_UNKNOWN || idx_type >= H5_INDEX_N)
	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")
    if(!oinfo)
        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no info struct")
    if(H5P_DEFAULT == lapl_id)
        lapl_id = H5P_LINK_ACCESS_DEFAULT;
    else
        if(TRUE != H5P_isa_class(lapl_id, H5P_LINK_ACCESS))
            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not link access property list ID")

    /* 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, according to the order in the index */
    if(H5G_loc_find_by_idx(&loc, group_name, idx_type, order, n, &obj_loc/*out*/, lapl_id, H5AC_ind_dxpl_id) < 0)
        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "group not found")
    loc_found = TRUE;

    /* Retrieve the object's information */
    if(H5O_get_info(obj_loc.oloc, oinfo, H5AC_ind_dxpl_id) < 0)
        HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't retrieve object info")

done:
    /* Release the object location */
    if(loc_found && H5G_loc_free(&obj_loc) < 0)
        HDONE_ERROR(H5E_SYM, H5E_CANTRELEASE, FAIL, "can't free location")

    FUNC_LEAVE_API(ret_value)
} /* end H5Oget_info_by_idx() */


/*-------------------------------------------------------------------------
 * Function:	H5Oclose
 *
 * Purpose:	Close an open file object.
 *
 *              This is the companion to H5Oopen. It is used to close any
 *              open object in an HDF5 file (but not IDs are that not file
 *              objects, such as property lists and dataspaces). It has
 *              the same effect as calling H5Gclose, H5Dclose, or H5Tclose.
 *
 * Return:	Success:	Non-negative
 *		Failure:	Negative
 *
 * Programmer:	James Laird
 *		July 14 2006
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5Oclose(hid_t object_id)
{
    herr_t       ret_value = SUCCEED;

    FUNC_ENTER_API(H5Oclose, FAIL)
    H5TRACE1("e", "i", object_id);

    /* Get the type of the object and close it in the correct way */
    switch(H5I_get_type(object_id))
    {
        case(H5I_GROUP):
        case(H5I_DATATYPE):
        case(H5I_DATASET):
            if(H5I_object(object_id) == NULL)
                HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "not a valid object")
            if(H5I_dec_ref(object_id) < 0)
                HGOTO_ERROR(H5E_OHDR, H5E_CANTRELEASE, FAIL, "unable to close object")
            break;

        default:
            HGOTO_ERROR(H5E_ARGS, H5E_CANTRELEASE, FAIL, "not a valid file object ID (dataset, group, or datatype)")
        break;
    } /* end switch */

done:
    FUNC_LEAVE_API(ret_value)
} /* end H5Oclose() */


/*-------------------------------------------------------------------------
 * 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, hid_t ocpl_id,
    H5O_loc_t *loc/*out*/)
{
    H5O_t      *oh = NULL;
    haddr_t     oh_addr;                /* Address of initial object header */
    size_t      oh_size;                /* Size of initial object header */
    herr_t      ret_value = SUCCEED;    /* return value */

    FUNC_ENTER_NOAPI(H5O_create, FAIL)

    /* check args */
    HDassert(f);
    HDassert(loc);
    HDassert(TRUE == H5P_isa_class(ocpl_id, H5P_OBJECT_CREATE));

    /* 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));

    /* Allocate the object header and fill in header fields */
    if(NULL == (oh = H5FL_CALLOC(H5O_t)))
        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")

    /* Initialize rudimentary information object object header */
    oh->version = H5F_USE_LATEST_FORMAT(f) ? H5O_VERSION_LATEST : H5O_VERSION_1;
    oh->sizeof_size = H5F_SIZEOF_SIZE(f);
    oh->sizeof_addr = H5F_SIZEOF_ADDR(f);

    /* Initialize version-specific fields */
    if(oh->version > H5O_VERSION_1) {
        H5P_genplist_t  *oc_plist;          /* Object creation property list */

        /* Initialize all time fields with current time */
        oh->atime = oh->mtime = oh->ctime = oh->btime = H5_now();

        /* Get the property list */
        if(NULL == (oc_plist = H5I_object(ocpl_id)))
            HGOTO_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not a property list")

        /* Initialize attribute tracking fields */

        /* Retrieve 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")

        /* Get object header flags */
        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")

        /* Set starting values for attribute info */
        oh->attr_fheap_addr = HADDR_UNDEF;
        oh->name_bt2_addr = HADDR_UNDEF;
    } /* end if */
    else {
        /* Reset unused time fields */
        oh->atime = oh->mtime = oh->ctime = oh->btime = 0;

        /* Reset unused attribute fields */
        oh->attr_fheap_addr = HADDR_UNDEF;
        oh->name_bt2_addr = HADDR_UNDEF;
    } /* end else */

    /* Compute total size of initial object header */
    /* (i.e. object header prefix and first chunk) */
    oh_size = 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 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].dirty = TRUE;
    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")

    /* Put magic # for object header in first chunk */
    if(oh->version > H5O_VERSION_1)
        HDmemcpy(oh->chunk[0].image, H5O_HDR_MAGIC, (size_t)H5O_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 first message */
    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 - H5O_SIZEOF_MSGHDR_OH(oh);
    oh->mesg[0].chunkno = 0;

    /* Cache object header */
    if(H5AC_set(f, dxpl_id, H5AC_OHDR, oh_addr, oh, H5AC__NO_FLAGS_SET) < 0)
        HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to cache object header")

    /* 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_dest(f, 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
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5O_open(const H5O_loc_t *loc)
{
    herr_t ret_value = SUCCEED;         /* Return value */

    FUNC_ENTER_NOAPI(H5O_open, FAIL)

    /* Check args */
    HDassert(loc);
    HDassert(loc->file);

#ifdef H5O_DEBUG
    if(H5DEBUG(O))
	HDfprintf(H5DEBUG(O), "> %a\n", loc->addr);
#endif

    /* Increment open-lock counters */
    loc->file->nopen_objs++;

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5O_open() */


/*-------------------------------------------------------------------------
 * 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
 *
 *-------------------------------------------------------------------------
 */
static hid_t
H5O_open_by_loc(H5G_loc_t *obj_loc, hid_t dxpl_id)
{
    const H5O_obj_class_t *obj_class;   /* Class of object for location */
    hid_t      ret_value;               /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5O_open_by_loc)

    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, dxpl_id)) < 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)
{
    herr_t ret_value = SUCCEED;   /* Return value */

    FUNC_ENTER_NOAPI(H5O_close, FAIL)

    /* Check args */
    HDassert(loc);
    HDassert(loc->file);
    HDassert(loc->file->nopen_objs > 0);

    /* Decrement open-lock counters */
    --loc->file->nopen_objs;

#ifdef H5O_DEBUG
    if(H5DEBUG(O)) {
	if(loc->file->file_id < 0 && 1 == loc->file->shared->nrefs)
	    HDfprintf(H5DEBUG(O), "< %a auto %lu remaining\n",
		      loc->addr,
		      (unsigned long)(loc->file->nopen_objs));
	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(loc->file->nopen_objs == loc->file->mtab.nmounts)
        /* Attempt to close down the file hierarchy */
        if(H5F_try_close(loc->file) < 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
 *
 * 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;
    unsigned oh_flags = H5AC__NO_FLAGS_SET; /* Whether the object was deleted  */
    int	ret_value;                          /* Return value */

    FUNC_ENTER_NOAPI(H5O_link, FAIL)

    /* check args */
    HDassert(loc);
    HDassert(loc->file);
    HDassert(H5F_addr_defined(loc->addr));
    if(adjust != 0 && 0 == (H5F_INTENT(loc->file) & H5F_ACC_RDWR))
	HGOTO_ERROR(H5E_OHDR, H5E_WRITEERROR, FAIL, "no write intent on file")

    /* get header */
    if(NULL == (oh = H5AC_protect(loc->file, dxpl_id, H5AC_OHDR, loc->addr,
				   NULL, NULL, H5AC_WRITE)))
	HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, FAIL, "unable to load object header")

    /* adjust link count */
    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")
	oh->nlink += adjust;
        oh_flags |= H5AC__DIRTIED_FLAG;

        /* Check if the object should be deleted */
        if(oh->nlink == 0) {
            /* Check if the object is still open by the user */
            if(H5FO_opened(loc->file, loc->addr) != NULL) {
                /* Flag the object to be deleted when it's closed */
                if(H5FO_mark(loc->file, loc->addr, TRUE) < 0)
                    HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "can't mark object for deletion")
            } /* end if */
            else {
                /* Delete object right now */
                if(H5O_delete_oh(loc->file, dxpl_id, oh) < 0)
                    HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "can't delete object from file")

                /* Mark the object header as deleted */
                oh_flags = H5C__DELETED_FLAG;
            } /* end else */
        } /* end if */
    } else if (adjust > 0) {
        /* A new object, or one that will be deleted */
        if(oh->nlink == 0) {
            /* Check if the object is current open, but marked for deletion */
            if(H5FO_marked(loc->file, loc->addr) > 0) {
                /* Remove "delete me" flag on the object */
                if(H5FO_mark(loc->file, loc->addr, FALSE) < 0)
                    HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "can't mark object for deletion")
            } /* end if */
        } /* end if */

	oh->nlink += adjust;
        oh_flags |= H5AC__DIRTIED_FLAG;
    } /* end if */

    /* Set return value */
    ret_value = oh->nlink;

done:
    if(oh && H5AC_unprotect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, oh, oh_flags) < 0)
	HDONE_ERROR(H5E_OHDR, H5E_PROTECT, FAIL, "unable to release object header")

    FUNC_LEAVE_NOAPI(ret_value)
} /* 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(H5O_loc_t *loc, hid_t dxpl_id)
{
    H5O_t	       *ret_value;      /* Return value */

    FUNC_ENTER_NOAPI(H5O_protect, NULL)

    /* check args */
    HDassert(loc);
    HDassert(loc->file);
    HDassert(H5F_addr_defined(loc->addr));

    /* Check for write access on the file */
    if(0 == (H5F_INTENT(loc->file) & H5F_ACC_RDWR))
	HGOTO_ERROR(H5E_OHDR, H5E_WRITEERROR, NULL, "no write intent on file")

    /* Lock the object header into the cache */
    if(NULL == (ret_value = H5AC_protect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, NULL, NULL, H5AC_WRITE)))
	HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, NULL, "unable to load object header")

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5O_protect() */


/*-------------------------------------------------------------------------
 * 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(H5O_loc_t *loc, H5O_t *oh, hid_t dxpl_id, unsigned oh_flags)
{
    herr_t ret_value = SUCCEED;      /* Return value */

    FUNC_ENTER_NOAPI(H5O_unprotect, FAIL)

    /* check args */
    HDassert(loc);
    HDassert(loc->file);
    HDassert(H5F_addr_defined(loc->addr));
    HDassert(oh);

    /* Release the object header from the cache */
    if(H5AC_unprotect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, oh, oh_flags) < 0)
	HGOTO_ERROR(H5E_OHDR, H5E_PROTECT, 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,
    unsigned * oh_flags_ptr)
{
    time_t	now;                    /* Current time */
    herr_t      ret_value = SUCCEED;    /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5O_touch_oh)

    HDassert(oh);
    HDassert(oh_flags_ptr);

    /* Get current time */
    now = H5_now();

    /* Check version, to determine how to store time information */
    if(oh->version == H5O_VERSION_1) {
        unsigned	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((idx = H5O_msg_alloc(f, dxpl_id, oh, H5O_MSG_MTIME_NEW, &mesg_flags, &now, oh_flags_ptr)) == UFAIL)
                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 = mesg_flags;
        } /* end if */

        /* 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;
    } /* 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;
    } /* end else */

    /* Mark the object header as dirty */
    *oh_flags_ptr |= H5AC__DIRTIED_FLAG;

done:
    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(H5O_loc_t *loc, hbool_t force, hid_t dxpl_id)
{
    H5O_t	*oh = NULL;
    unsigned 	oh_flags = H5AC__NO_FLAGS_SET;
    herr_t      ret_value = SUCCEED;       /* Return value */

    FUNC_ENTER_NOAPI(H5O_touch, FAIL)

    /* check args */
    HDassert(loc);
    HDassert(loc->file);
    HDassert(H5F_addr_defined(loc->addr));
    if(0 == (H5F_INTENT(loc->file) & H5F_ACC_RDWR))
	HGOTO_ERROR(H5E_OHDR, H5E_WRITEERROR, FAIL, "no write intent on file")

    /* Get the object header */
    if(NULL == (oh = H5AC_protect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, NULL, NULL, H5AC_WRITE)))
	HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, FAIL, "unable to load object header")

    /* Create/Update the modification time message */
    if(H5O_touch_oh(loc->file, dxpl_id, oh, force, &oh_flags) < 0)
	HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to update object modificaton time")

done:
    if(oh && H5AC_unprotect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, oh, oh_flags) < 0)
	HDONE_ERROR(H5E_OHDR, H5E_PROTECT, 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, hbool_t * oh_flags_ptr)
{
    int	idx;
    herr_t      ret_value = SUCCEED;       /* Return value */

    FUNC_ENTER(H5O_bogus_oh, FAIL)

    HDassert(f);
    HDassert(oh);
    HDassert(oh_flags_ptr);

    /* Look for existing message */
    for(idx = 0; idx < oh->nmesgs; idx++)
	if(H5O_MSG_BOGUS == oh->mesg[idx].type)
            break;

    /* Create a new message */
    if(idx == oh->nmesgs) {
        H5O_bogus_t *bogus;             /* Pointer to the bogus information */
        unsigned mesg_flags = 0;        /* Flags for message in object header */

        /* 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;

        /* Allocate space in the object header for bogus message */
	if((idx = H5O_msg_alloc(f, dxpl_id, oh, H5O_MSG_BOGUS, &mesg_flags, bogus, oh_flags_ptr)) < 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;

        /* Mark the message and object header as dirty */
	*oh_flags_ptr = TRUE;
        oh->mesg[idx].flags = mesg_flags;
        oh->mesg[idx].dirty = TRUE;
        oh->dirty = TRUE;
    } /* end if */

done:
    FUNC_LEAVE(ret_value)
} /* end H5O_bogus_oh() */


/*-------------------------------------------------------------------------
 * Function:	H5O_bogus
 *
 * Purpose:	Create a "bogus" message in an object.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *              <koziol@ncsa.uiuc.edu>
 *              Tuesday, January 21, 2003
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5O_bogus(H5O_loc_t *loc, hid_t dxpl_id)
{
    H5O_t	*oh = NULL;
    unsigned	oh_flags = H5AC__NO_FLAGS_SET;
    herr_t	ret_value = SUCCEED;

    FUNC_ENTER(H5O_bogus, FAIL)

    /* check args */
    HDassert(loc);
    HDassert(loc->file);
    HDassert(H5F_addr_defined(loc->addr));

    /* Verify write access to the file */
    if(0 == (H5F_INTENT(loc->file) & H5F_ACC_RDWR))
	HGOTO_ERROR(H5E_OHDR, H5E_WRITEERROR, FAIL, "no write intent on file")

    /* Get the object header */
    if(NULL == (oh = H5AC_protect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, NULL, NULL, H5AC_WRITE)))
	HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, FAIL, "unable to load object header")

    /* Create the "bogus" message */
    if(H5O_bogus_oh(ent->file, dxpl_id, oh, &oh_flags) < 0)
	HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to update object 'bogus' message")

done:
    if(oh && H5AC_unprotect(ent->file, dxpl_id, H5AC_OHDR, ent->header, oh, oh_flags) < 0)
	HDONE_ERROR(H5E_OHDR, H5E_PROTECT, FAIL, "unable to release object header")

    FUNC_LEAVE(ret_value)
} /* end H5O_bogus() */
#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 */
    herr_t ret_value = SUCCEED; /* Return value */

    FUNC_ENTER_NOAPI(H5O_delete,FAIL)

    /* Check args */
    HDassert(f);
    HDassert(H5F_addr_defined(addr));

    /* Get the object header information */
    if(NULL == (oh = H5AC_protect(f, dxpl_id, H5AC_OHDR, addr, NULL, NULL, H5AC_WRITE)))
	HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, 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")

done:
    if(oh && H5AC_unprotect(f, dxpl_id, H5AC_OHDR, addr, oh, H5AC__DIRTIED_FLAG | H5C__DELETED_FLAG) < 0)
	HDONE_ERROR(H5E_OHDR, H5E_PROTECT, FAIL, "unable to release object header")

    FUNC_LEAVE_NOAPI(ret_value)
} /* 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(H5O_delete_oh)

    /* 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, curr_msg) < 0)
            HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "unable to delete file space for object header message")
    } /* end for */

    /* Check for dense attribute storage & delete it if necessary */
    if(oh->version > H5O_VERSION_1 && H5F_addr_defined(oh->attr_fheap_addr)) {
        if(H5A_dense_delete(f, dxpl_id, oh) < 0)
            HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "unable to delete dense attribute storage")
    } /* end if */

    /* Free main (first) object header "chunk" */
    if(H5MF_xfree(f, H5FD_MEM_OHDR, dxpl_id, oh->chunk[0].addr, (hsize_t)oh->chunk[0].size) < 0)
        HGOTO_ERROR(H5E_OHDR, H5E_CANTFREE, FAIL, "unable to free object header")

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:	An object type defined in H5Gpublic.h
 *		Failure:	H5G_UNKNOWN
 *
 * 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(H5O_obj_type, FAIL)

    /* Load the object header */
    if(NULL == (oh = H5AC_protect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, NULL, NULL, H5AC_READ)))
	HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, 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 && H5AC_unprotect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, oh, H5AC__NO_FLAGS_SET) != SUCCEED)
	HDONE_ERROR(H5E_OHDR, H5E_PROTECT, FAIL, "unable to release object header")

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5O_obj_type() */


/*-------------------------------------------------------------------------
 * Function:	H5O_obj_type_real
 *
 * Purpose:	Returns the type of object pointed to by `oh'.
 *
 * Return:	Success:	An object type defined in H5Opublic.h
 *		Failure:	H5G_UNKNOWN
 *
 * 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 */
    herr_t ret_value = SUCCEED;                 /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5O_obj_type_real)

    /* Sanity check */
    HDassert(oh);
    HDassert(obj_type);

    /* Look up class for object header */
    if(NULL == (obj_class = H5O_obj_class_real(oh)))
        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "unable to determine object type")

    /* Set object type */
    *obj_type = obj_class->type;

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* 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
 *
 *-------------------------------------------------------------------------
 */
static const H5O_obj_class_t *
H5O_obj_class(H5O_loc_t *loc, hid_t dxpl_id)
{
    H5O_t	*oh = NULL;                     /* Object header for location */
    const H5O_obj_class_t *ret_value;           /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5O_obj_class)

    /* Load the object header */
    if(NULL == (oh = H5AC_protect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, NULL, NULL, H5AC_READ)))
	HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, 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_CANTINIT, NULL, "unable to determine object type")

done:
    if(oh && H5AC_unprotect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, oh, H5AC__NO_FLAGS_SET) != SUCCEED)
	HDONE_ERROR(H5E_OHDR, H5E_PROTECT, NULL, "unable to release object header")

    FUNC_LEAVE_NOAPI(ret_value)
} /* 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
 *
 *-------------------------------------------------------------------------
 */
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;   /* Return value */

    FUNC_ENTER_NOAPI(H5O_obj_class_real, 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;     /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5O_get_loc)

    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;

        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_NOFUNC(H5O_loc_reset)

    /* 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, const H5O_loc_t *src, H5_copy_depth_t depth)
{
    FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5O_loc_copy)

    /* 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)
            dst->file->nopen_objs++;
    } else if(depth == H5_COPY_SHALLOW) {
        /* Discarding 'const' qualifier OK - QAK */
        H5O_loc_reset((H5O_loc_t *)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_NOFUNC(H5O_loc_hold_file)

    /* Check arguments */
    HDassert(loc);
    HDassert(loc->file);

    /* If this location is not already holding its file open, do so. */
    if(!loc->holding_file)
    {
        loc->file->nopen_objs++;
        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(H5O_loc_free)

    /* Check arguments */
    HDassert(loc);

    /* If this location is holding its file open try to close the file. */
    if(loc->holding_file) {
        loc->file->nopen_objs--;
        loc->holding_file = FALSE;
        if(loc->file->nopen_objs <= 0) {
            if(H5F_try_close(loc->file) < 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_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(H5O_loc_t *oloc, H5O_info_t *oinfo, hid_t dxpl_id)
{
    H5O_t *oh = NULL;                   /* Object header */
    H5O_chunk_t *curr_chunk;	        /* Pointer to current message being operated on */
    H5O_mesg_t *curr_msg;               /* Pointer to current message being operated on */
    unsigned u;                         /* Local index variable */
    herr_t ret_value = SUCCEED;         /* Return value */

    FUNC_ENTER_NOAPI(H5O_get_info, FAIL)

    /* Check args */
    HDassert(oloc);
    HDassert(oinfo);

    /* Get the object header */
    if(NULL == (oh = H5AC_protect(oloc->file, dxpl_id, H5AC_OHDR, oloc->addr, NULL, NULL, H5AC_READ)))
	HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, FAIL, "unable to load object header")

    /* Retrieve the file's fileno */
    if(H5F_get_fileno(oloc->file, &oinfo->fileno) < 0)
        HGOTO_ERROR(H5E_OHDR, H5E_BADVALUE, FAIL, "unable to read fileno")

    /* Set the object's address */
    oinfo->addr = oloc->addr;

    /* Retrieve the type of the object */
    if(H5O_obj_type_real(oh, &oinfo->type) < 0)
        HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to determine object 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 {
        /* 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(NULL == H5O_msg_read_real(oloc->file, dxpl_id, oh, H5O_MTIME_ID, &oinfo->ctime)) {
            H5E_clear_stack(NULL);
            if(NULL == H5O_msg_read_real(oloc->file, dxpl_id, oh, H5O_MTIME_NEW_ID, &oinfo->ctime)) {
                H5E_clear_stack(NULL);
                oinfo->ctime = 0;
            } /* end if */
        } /* end if */
    } /* end else */

    /* Set the version for the object header */
    oinfo->hdr.version = oh->version;

    /* Set the number of messages & chunks */
    oinfo->hdr.nmesgs = oh->nmesgs;
    oinfo->hdr.nchunks = oh->nchunks;

    /* Iterate over all the messages, accumulating message size & type information */
    oinfo->num_attrs = 0;
    oinfo->hdr.meta_space = H5O_SIZEOF_HDR(oh) + (H5O_SIZEOF_CHKHDR_OH(oh) * (oh->nchunks - 1));
    oinfo->hdr.mesg_space = 0;
    oinfo->hdr.free_space = 0;
    oinfo->hdr.msg_present = 0;
    oinfo->hdr.msg_shared = 0;
    for(u = 0, curr_msg = &oh->mesg[0]; u < oh->nmesgs; u++, curr_msg++) {
        uint64_t type_flag;             /* Flag for message type */

        /* Check for attribute message */
	if(H5O_ATTR_ID == curr_msg->type->id)
            oinfo->num_attrs++;

        /* Accumulate information, based on the type of message */
	if(H5O_NULL_ID == curr_msg->type->id)
            oinfo->hdr.free_space += H5O_SIZEOF_MSGHDR_OH(oh) + curr_msg->raw_size;
        else if(H5O_CONT_ID == curr_msg->type->id)
            oinfo->hdr.meta_space += H5O_SIZEOF_MSGHDR_OH(oh) + curr_msg->raw_size;
        else {
            oinfo->hdr.meta_space += H5O_SIZEOF_MSGHDR_OH(oh);
            oinfo->hdr.mesg_space += curr_msg->raw_size;
        } /* end else */

        /* Set flag to indicate present of message type */
        type_flag = ((uint64_t)1) << curr_msg->type->id;
        oinfo->hdr.msg_present |= type_flag;

        /* Set flag if the message is shared in some way */
        if(curr_msg->flags & H5O_MSG_FLAG_SHARED)                                   \
            oinfo->hdr.msg_shared |= type_flag;
    } /* end for */

    /* Sanity checking, etc. for # of attributes */
    if(oh->version > H5O_VERSION_1) {
        if(H5F_addr_defined(oh->attr_fheap_addr)) {
            HDassert(oinfo->num_attrs == 0);
            oinfo->num_attrs = oh->nattrs;
        } /* end if */
        else
            HDassert(oh->nattrs == oinfo->num_attrs);
    } /* end if */

    /* Iterate over all the chunks, adding any gaps to the free space */
    oinfo->hdr.hdr_size = 0;
    for(u = 0, curr_chunk = &oh->chunk[0]; u < oh->nchunks; u++, curr_chunk++) {
        /* Accumulate the size of the header on header */
        oinfo->hdr.hdr_size += curr_chunk->size;

        /* If the chunk has a gap, add it to the free space */
        oinfo->hdr.free_space += curr_chunk->gap;
    } /* end for */

    /* Sanity check that all the bytes are accounted for */
    HDassert(oinfo->hdr.hdr_size == (oinfo->hdr.free_space + oinfo->hdr.meta_space + oinfo->hdr.mesg_space + oh->skipped_mesg_size));

done:
    if(oh && H5AC_unprotect(oloc->file, dxpl_id, H5AC_OHDR, oloc->addr, 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_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 *oloc, 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(H5O_get_create_plist, FAIL)

    /* Check args */
    HDassert(oloc);
    HDassert(oc_plist);

    /* Get the object header */
    if(NULL == (oh = H5AC_protect(oloc->file, dxpl_id, H5AC_OHDR, oloc->addr, NULL, NULL, H5AC_READ)))
	HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, FAIL, "unable to load object header")

    /* Set property values, if they were used for the object */
    if(oh->version > H5O_VERSION_1) {
        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")
    } /* end if */

done:
    if(oh && H5AC_unprotect(oloc->file, dxpl_id, H5AC_OHDR, oloc->addr, 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_create_plist() */
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