path: root/src/H5F.c

/****************************************************************************
* NCSA HDF								    *
* Software Development Group						    *
* National Center for Supercomputing Applications			    *
* University of Illinois at Urbana-Champaign				    *
* 605 E. Springfield, Champaign IL 61820				    *
*									    *
* For conditions of distribution and use, see the accompanying		    *
* hdf/COPYING file.   							    *
*                                                                           *
* MODIFICATIONS                                                             *
*	Robb Matzke, 30 Aug 1997                                            *
*	Added `ERRORS' fields to function prologues.                        *
*                                                                           *  
****************************************************************************/

/* $Id$ */

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

/* Predefined file drivers */
#include "H5FDcore.h"		/*temporary in-memory files		  */
#include "H5FDfamily.h"		/*family of files			  */
#include "H5FDgass.h"           /*GASS I/O                                */
#include "H5FDlog.h"            /* sec2 driver with logging, for debugging */
#include "H5FDmpio.h"		/*MPI-2 I/O				  */
#include "H5FDmpiposix.h"	/*MPI-2 & posix I/O			  */
#include "H5FDmulti.h"		/*multiple files partitioned by mem usage */
#include "H5FDsec2.h"		/*Posix unbuffered I/O			  */
#include "H5FDsrb.h"            /*SRB I/O                                 */
#include "H5FDstdio.h"		/* Standard C buffered I/O		  */
#include "H5FDstream.h"         /*in-memory files streamed via sockets    */

/* Packages needed by this file... */
#include "H5private.h"		/*library functions			  */
#include "H5Aprivate.h"		/*attributes				  */
#include "H5ACprivate.h"	/*cache					  */
#include "H5Dprivate.h"		/*datasets				  */
#include "H5Eprivate.h"		/*error handling			  */
#include "H5Fpkg.h"             /*file access                             */
#include "H5FDprivate.h"	/*file driver				  */
#include "H5FLprivate.h"	/*Free Lists	  */
#include "H5Iprivate.h"		/*object IDs				  */
#include "H5Gprivate.h"		/*symbol tables				  */
#include "H5MMprivate.h"	/*core memory management		  */
#include "H5Pprivate.h"		/*property lists			  */
#include "H5Tprivate.h"		/*data types				  */

#define PABLO_MASK	H5F_mask

/* Interface initialization */
static int interface_initialize_g = 0;
#define INTERFACE_INIT H5F_init_interface
static herr_t H5F_init_interface(void);

/* Struct only used by functions H5F_get_objects and H5F_get_objects_cb */
typedef struct H5F_olist_t {
    H5I_type_t obj_type;
    hid_t      *obj_id_list;
    unsigned   *obj_id_count;
    H5F_file_t *shared;
    unsigned   list_index;
} H5F_olist_t;    

/* PRIVATE PROTOTYPES */
static H5F_t *H5F_new(H5F_file_t *shared, hid_t fcpl_id, hid_t fapl_id);
static herr_t H5F_dest(H5F_t *f);
static herr_t H5F_flush(H5F_t *f, H5F_scope_t scope, hbool_t invalidate,
			hbool_t alloc_only, hbool_t closing);
static haddr_t H5F_locate_signature(H5FD_t *file);
static int H5F_flush_all_cb(H5F_t *f, hid_t fid, const void *_invalidate);
static herr_t H5F_get_objects(H5F_t *f, unsigned types, hid_t *obj_id_list, 
				unsigned *obj_id_count);
static herr_t H5F_get_objects_cb(void *obj_ptr, hid_t obj_id, void *key);

/* Declare a free list to manage the H5F_t struct */
H5FL_DEFINE_STATIC(H5F_t);

/* Declare a free list to manage the H5F_file_t struct */
H5FL_DEFINE_STATIC(H5F_file_t);

/* Declare the external free list for the H5G_t struct */
H5FL_EXTERN(H5G_t);

/* Declare the external PQ free list for the sieve buffer information */
H5FL_BLK_EXTERN(sieve_buf);


/*-------------------------------------------------------------------------
 * Function:	H5F_init
 *
 * Purpose:	Initialize the interface from some other layer.
 *
 * Return:	Success:	non-negative
 *
 *		Failure:	negative
 *
 * Programmer:	Robb Matzke
 *              Wednesday, December 16, 1998
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5F_init(void)
{
    herr_t ret_value=SUCCEED;   /* Return value */

    FUNC_ENTER_NOAPI(H5F_init, FAIL);
    /* FUNC_ENTER() does all the work */

done:
    FUNC_LEAVE(ret_value);
}


/*-------------------------------------------------------------------------
 * Function:	H5F_init_interface
 *
 * Purpose:	Initialize interface-specific information.
 *
 * Return:	Success:	non-negative
 *
 *		Failure:	negative
 *
 * Programmer:	Robb Matzke
 *              Friday, November 20, 1998
 *
 * Modifications:
 * 	Robb Matzke, 4 Aug 1997
 *	Changed pablo mask from H5_mask to H5F_mask for the FUNC_LEAVE call.
 *	It was already H5F_mask for the PABLO_TRACE_ON call.
 *
 *  	Kim Yates, 1998-08-16
 *	Added .disp, .btype, .ftype to H5F_access_t.
 *
 * 	Robb Matzke, 1999-02-19
 *	Added initialization for the H5I_FILE_CLOSING ID group.
 *
 *      Raymond Lu, April 10, 2000
 *      Put SRB into the 'Register predefined file drivers' list.
 *
 *      Thomas Radke, 2000-09-12
 *      Put Stream VFD into the 'Register predefined file drivers' list.
 *
 *      Raymond Lu, 2001-10-14
 *	Change File creation property list to generic property list mechanism.
 *-------------------------------------------------------------------------
 */
static herr_t 
H5F_init_interface(void)
{
    size_t      nprops;                 /* Number of properties */
    herr_t	ret_value = SUCCEED;
    herr_t	status;

    /* File creation property class variables.  In sequence, they are
     * - File create property list class to modify
     * - Default value for size of file user block 
     * - Default value for 1/2 rank for symbol table leaf nodes
     * - Default value for 1/2 rank for btree internal nodes
     * - Default value for byte number in an address
     * - Default value for byte number for object size
     * - Default value for version number of bootblock
     * - Default value for free-space version number
     * - Default value for object directory version number
     * - Default value for share-header format version 
     */
    H5P_genclass_t  *crt_pclass;
    hsize_t         userblock_size      = H5F_CRT_USER_BLOCK_DEF;
    unsigned        sym_leaf_k          = H5F_CRT_SYM_LEAF_DEF;
    int             btree_k[H5B_NUM_BTREE_ID] = H5F_CRT_BTREE_RANK_DEF;
    size_t          sizeof_addr         = H5F_CRT_ADDR_BYTE_NUM_DEF;
    size_t          sizeof_size         = H5F_CRT_OBJ_BYTE_NUM_DEF;
    int             bootblock_ver       = H5F_CRT_BOOT_VERS_DEF;
    int             freespace_ver       = H5F_CRT_FREESPACE_VERS_DEF;
    int             objectdir_ver       = H5F_CRT_OBJ_DIR_VERS_DEF;
    int             sharedheader_ver    = H5F_CRT_SHARE_HEAD_VERS_DEF;
    /* File access property class variables.  In sequence, they are 
     * - File access property class to modify
     * - Size of meta data cache(elements)
     * - Size of raw data chunk cache(elements)
     * - Size of raw data chunk cache(bytes)
     * - Preemption for reading chunks
     * - Threshold for alignment
     * - Alignment
     * - Minimum metadata allocation block size
     * - Maximum sieve buffer size
     * - Garbage-collect reference
     * - File driver ID
     * - File driver info 
     */
    H5P_genclass_t  *acs_pclass;
    int             mdc_nelmts          = H5F_ACS_META_CACHE_SIZE_DEF;
    size_t          rdcc_nelmts         = H5F_ACS_DATA_CACHE_ELMT_SIZE_DEF;
    size_t          rdcc_nbytes         = H5F_ACS_DATA_CACHE_BYTE_SIZE_DEF;
    double          rdcc_w0             = H5F_ACS_PREEMPT_READ_CHUNKS_DEF;
    hsize_t         threshold           = H5F_ACS_ALIGN_THRHD_DEF;
    hsize_t         alignment           = H5F_ACS_ALIGN_DEF;
    hsize_t         meta_block_size     = H5F_ACS_META_BLOCK_SIZE_DEF;
    size_t          sieve_buf_size      = H5F_ACS_SIEVE_BUF_SIZE_DEF;
    hsize_t         sdata_block_size    = H5F_ACS_SDATA_BLOCK_SIZE_DEF;
    unsigned        gc_ref              = H5F_ACS_GARBG_COLCT_REF_DEF;
    hid_t           driver_id           = H5F_ACS_FILE_DRV_ID_DEF;
    void            *driver_info        = H5F_ACS_FILE_DRV_INFO_DEF;
    H5F_close_degree_t close_degree     = H5F_CLOSE_DEGREE_DEF;
    hsize_t         family_offset       = H5F_ACS_FAMILY_OFFSET_DEF;
    H5FD_mem_t      mem_type            = H5F_ACS_MULTI_TYPE_DEF;

    /* File mount property class variable. 
     * - Mount property class to modify
     * - whether absolute symlinks is local to file 
     */
    H5P_genclass_t  *mnt_pclass;
    hbool_t 	    local		= H5F_MNT_SYM_LOCAL_DEF;
    
    FUNC_ENTER_NOINIT(H5F_init_interface);

#ifdef H5_HAVE_PARALLEL
    {
        /* Allow MPI buf-and-file-type optimizations? */
        const char *s = HDgetenv ("HDF5_MPI_1_METAWRITE");
        if (s && HDisdigit(*s)) {
            H5_mpiposix_1_metawrite_g = H5_mpi_1_metawrite_g = (int)HDstrtol (s, NULL, 0);
        }
    }
#endif /* H5_HAVE_PARALLEL */

    /*
     * Initialize the atom group for the file IDs. There are two groups:
     * the H5I_FILE group contains all the ID's for files which are currently
     * open at the public API level while the H5I_FILE_CLOSING group contains
     * ID's for files for which the application has called H5Fclose() but
     * which are pending completion because there are object headers still
     * open within the file.
     */
    if (H5I_init_group(H5I_FILE, H5I_FILEID_HASHSIZE, 0, (H5I_free_t)H5F_close)<0 ||
            H5I_init_group(H5I_FILE_CLOSING, H5I_FILEID_HASHSIZE, 0, (H5I_free_t)H5F_close)<0)
        HGOTO_ERROR (H5E_FILE, H5E_CANTINIT, FAIL, "unable to initialize interface");
   
    /* ========== File Creation Property Class Initialization ============*/ 
    assert(H5P_CLS_FILE_CREATE_g!=-1);

    /* Get the pointer to file creation class */
    if(NULL == (crt_pclass = H5I_object_verify(H5P_CLS_FILE_CREATE_g, H5I_GENPROP_CLS)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a property list class");

    /* Get the number of properties in the class */
    if(H5P_get_nprops_pclass(crt_pclass,&nprops)<0)
        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "can't query number of properties");

    /* Assume that if there are properties in the class, they are the default ones */
    if(nprops==0) {
        /* Register the user block size */
        if(H5P_register(crt_pclass,H5F_CRT_USER_BLOCK_NAME,H5F_CRT_USER_BLOCK_SIZE, &userblock_size,NULL,NULL,NULL,NULL,NULL,NULL)<0) 
             HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class");    

        /* Register the 1/2 rank for symbol table leaf nodes */
        if(H5P_register(crt_pclass,H5F_CRT_SYM_LEAF_NAME,H5F_CRT_SYM_LEAF_SIZE, &sym_leaf_k,NULL,NULL,NULL,NULL,NULL,NULL)<0) 
             HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class");

        /* Register the 1/2 rank for btree internal nodes */
        if(H5P_register(crt_pclass,H5F_CRT_BTREE_RANK_NAME,H5F_CRT_BTREE_RANK_SIZE, btree_k,NULL,NULL,NULL,NULL,NULL,NULL)<0) 
             HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class");

        /* Register the byte number for an address */
        if(H5P_register(crt_pclass,H5F_CRT_ADDR_BYTE_NUM_NAME, H5F_CRT_ADDR_BYTE_NUM_SIZE, &sizeof_addr,NULL,NULL,NULL,NULL,NULL, NULL)<0) 
             HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class");

        /* Register the byte number for object size */
        if(H5P_register(crt_pclass,H5F_CRT_OBJ_BYTE_NUM_NAME, H5F_CRT_OBJ_BYTE_NUM_SIZE,&sizeof_size,NULL,NULL,NULL,NULL,NULL, NULL)<0) 
             HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class");

        /* Register the bootblock version number */
        if(H5P_register(crt_pclass,H5F_CRT_BOOT_VERS_NAME,H5F_CRT_BOOT_VERS_SIZE, &bootblock_ver,NULL,NULL,NULL,NULL,NULL,NULL)<0) 
             HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class");

        /* Register the free-space version number */
        if(H5P_register(crt_pclass,H5F_CRT_FREESPACE_VERS_NAME, H5F_CRT_FREESPACE_VERS_SIZE,&freespace_ver,NULL,NULL,NULL,NULL,NULL, NULL)<0) 
             HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class");

        /* Register the object directory version number */
        if(H5P_register(crt_pclass,H5F_CRT_OBJ_DIR_VERS_NAME, H5F_CRT_OBJ_DIR_VERS_SIZE,&objectdir_ver,NULL,NULL,NULL,NULL,NULL, NULL)<0) 
             HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class");

        /* Register the shared-header version number */
        if(H5P_register(crt_pclass,H5F_CRT_SHARE_HEAD_VERS_NAME, H5F_CRT_SHARE_HEAD_VERS_SIZE, &sharedheader_ver,NULL,NULL,NULL,NULL, NULL,NULL)<0) 
             HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class");
    } /* end if */

    /* Only register the default property list if it hasn't been created yet */
    if(H5P_LST_FILE_CREATE_g==(-1)) {
        /* Register the default file creation property list */
        if((H5P_LST_FILE_CREATE_g = H5P_create_id(crt_pclass))<0)
             HGOTO_ERROR(H5E_PLIST, H5E_CANTREGISTER, FAIL, "can't insert property into class");
    } /* end if */

    /* Register predefined file drivers */
    H5E_BEGIN_TRY {
	if ((status=H5FD_SEC2)<0) goto end_registration;
	if ((status=H5FD_STDIO)<0) goto end_registration;
	if ((status=H5FD_FAMILY)<0) goto end_registration;
#ifdef H5_HAVE_GASS
	if ((status=H5FD_GASS)<0) goto end_registration;
#endif
#ifdef H5_HAVE_SRB
	if ((status=H5FD_SRB)<0) goto end_registration;
#endif
	if ((status=H5FD_CORE)<0) goto end_registration;
	if ((status=H5FD_MULTI)<0) goto end_registration;
#ifdef H5_HAVE_PARALLEL
	if ((status=H5FD_MPIO)<0) goto end_registration;
	if ((status=H5FD_MPIPOSIX)<0) goto end_registration;
#endif /* H5_HAVE_PARALLEL */
#ifdef H5_HAVE_STREAM
	if ((status=H5FD_STREAM)<0) goto end_registration;
#endif
    end_registration: ;
	} H5E_END_TRY;

    if (status<0)
	HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "file driver registration failed");
    
    /* ========== File Access Property Class Initialization ============*/
    assert(H5P_CLS_FILE_ACCESS_g!=-1);

    /* Get the pointer to file creation class */
    if(NULL == (acs_pclass = H5I_object_verify(H5P_CLS_FILE_ACCESS_g, H5I_GENPROP_CLS)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a property list class");

    /* Get the number of properties in the class */
    if(H5P_get_nprops_pclass(acs_pclass,&nprops)<0)
        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "can't query number of properties");

    /* Assume that if there are properties in the class, they are the default ones */
    if(nprops==0) {
        /* Register the size of meta data cache(elements) */
        if(H5P_register(acs_pclass,H5F_ACS_META_CACHE_SIZE_NAME,H5F_ACS_META_CACHE_SIZE_SIZE, &mdc_nelmts,NULL,NULL,NULL,NULL,NULL,NULL)<0) 
             HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class"); 

        /* Register the size of raw data chunk cache (elements) */
        if(H5P_register(acs_pclass,H5F_ACS_DATA_CACHE_ELMT_SIZE_NAME,H5F_ACS_DATA_CACHE_ELMT_SIZE_SIZE, &rdcc_nelmts,NULL,NULL,NULL,NULL,NULL,NULL)<0) 
             HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class"); 

        /* Register the size of raw data chunk cache(bytes) */
        if(H5P_register(acs_pclass,H5F_ACS_DATA_CACHE_BYTE_SIZE_NAME,H5F_ACS_DATA_CACHE_BYTE_SIZE_SIZE, &rdcc_nbytes,NULL,NULL,NULL,NULL,NULL,NULL)<0) 
             HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class"); 

        /* Register the preemption for reading chunks */
        if(H5P_register(acs_pclass,H5F_ACS_PREEMPT_READ_CHUNKS_NAME,H5F_ACS_PREEMPT_READ_CHUNKS_SIZE, &rdcc_w0,NULL,NULL,NULL,NULL,NULL,NULL)<0) 
             HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class"); 

        /* Register the threshold for alignment */
        if(H5P_register(acs_pclass,H5F_ACS_ALIGN_THRHD_NAME,H5F_ACS_ALIGN_THRHD_SIZE, &threshold,NULL,NULL,NULL,NULL,NULL,NULL)<0) 
             HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class"); 

        /* Register the alignment */
        if(H5P_register(acs_pclass,H5F_ACS_ALIGN_NAME,H5F_ACS_ALIGN_SIZE, &alignment,NULL,NULL,NULL,NULL,NULL,NULL)<0) 
             HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class"); 

        /* Register the minimum metadata allocation block size */
        if(H5P_register(acs_pclass,H5F_ACS_META_BLOCK_SIZE_NAME,H5F_ACS_META_BLOCK_SIZE_SIZE, &meta_block_size,NULL,NULL,NULL,NULL,NULL,NULL)<0) 
             HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class"); 

        /* Register the maximum sieve buffer size */
        if(H5P_register(acs_pclass,H5F_ACS_SIEVE_BUF_SIZE_NAME,H5F_ACS_SIEVE_BUF_SIZE_SIZE, &sieve_buf_size,NULL,NULL,NULL,NULL,NULL,NULL)<0) 
             HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class"); 

        /* Register the minimum "small data" allocation block size */
        if(H5P_register(acs_pclass,H5F_ACS_SDATA_BLOCK_SIZE_NAME,H5F_ACS_SDATA_BLOCK_SIZE_SIZE, &sdata_block_size,NULL,NULL,NULL,NULL,NULL,NULL)<0) 
             HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class"); 

        /* Register the garbage collection reference */
        if(H5P_register(acs_pclass,H5F_ACS_GARBG_COLCT_REF_NAME,H5F_ACS_GARBG_COLCT_REF_SIZE, &gc_ref,NULL,NULL,NULL,NULL,NULL,NULL)<0) 
             HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class"); 

        /* Register the file driver ID */
        if(H5P_register(acs_pclass,H5F_ACS_FILE_DRV_ID_NAME,H5F_ACS_FILE_DRV_ID_SIZE, &driver_id,NULL,NULL,NULL,NULL,NULL,NULL)<0) 
             HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class"); 

        /* Register the file driver info */
        if(H5P_register(acs_pclass,H5F_ACS_FILE_DRV_INFO_NAME,H5F_ACS_FILE_DRV_INFO_SIZE, &driver_info,NULL,NULL,NULL,NULL,NULL,NULL)<0) 
             HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class");

        /* Register the file close degree */
        if(H5P_register(acs_pclass,H5F_CLOSE_DEGREE_NAME,H5F_CLOSE_DEGREE_SIZE, &close_degree,NULL,NULL,NULL,NULL,NULL,NULL)<0)
             HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class");

        /* Register the offset of family driver info */
        if(H5P_register(acs_pclass,H5F_ACS_FAMILY_OFFSET_NAME,H5F_ACS_FAMILY_OFFSET_SIZE, &family_offset,NULL,NULL,NULL,NULL,NULL,NULL)<0)
             HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class");

        /* Register the data type of multi driver info */
        if(H5P_register(acs_pclass,H5F_ACS_MULTI_TYPE_NAME,H5F_ACS_MULTI_TYPE_SIZE, &mem_type,NULL,NULL,NULL,NULL,NULL,NULL)<0)
             HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class");
    } /* end if */

    /* Only register the default property list if it hasn't been created yet */
    if(H5P_LST_FILE_ACCESS_g==(-1)) {
        /* Register the default file access property list */
        if((H5P_LST_FILE_ACCESS_g = H5P_create_id(acs_pclass))<0)
             HGOTO_ERROR(H5E_PLIST, H5E_CANTREGISTER, FAIL, "can't insert property into class");
    } /* end if */

    /* ================ Mount Porperty Class Initialization ==============*/
    assert(H5P_CLS_MOUNT_g!=-1);

    /* Get the pointer to file mount class */
    if(NULL == (mnt_pclass = H5I_object_verify(H5P_CLS_MOUNT_g, H5I_GENPROP_CLS)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a property list class");

    /* Get the number of properties in the class */
    if(H5P_get_nprops_pclass(mnt_pclass,&nprops)<0)
        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "can't query number of properties");

    /* Assume that if there are properties in the class, they are the default ones */
    if(nprops==0) {
        /* Register property of whether symlinks is local to file */
        if(H5P_register(mnt_pclass,H5F_MNT_SYM_LOCAL_NAME,H5F_MNT_SYM_LOCAL_SIZE, &local,NULL,NULL,NULL,NULL,NULL,NULL)<0) 
             HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class"); 
    } /* end if */

    /* Only register the default property list if it hasn't been created yet */
    if(H5P_LST_MOUNT_g==(-1)) {
        /* Register the default file mount property list */
        if((H5P_LST_MOUNT_g = H5P_create_id(mnt_pclass))<0)
             HGOTO_ERROR(H5E_PLIST, H5E_CANTREGISTER, FAIL, "can't insert property into class");
    } /* end if */

done:
    FUNC_LEAVE(ret_value);
}


/*-------------------------------------------------------------------------
 * Function:	H5F_term_interface
 *
 * Purpose:	Terminate this interface: free all memory and reset global
 *		variables to their initial values.  Release all ID groups
 *		associated with this interface.
 *
 * Return:	Success:	Positive if anything was done that might
 *				have affected other interfaces; zero
 *				otherwise.
 *
 *		Failure:        Never fails.
 *
 * Programmer:	Robb Matzke
 *              Friday, February 19, 1999
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
int
H5F_term_interface(void)
{
    int	n = 0;

    FUNC_ENTER_NOINIT(H5F_term_interface);

    if (interface_initialize_g) {
	if ((n=H5I_nmembers(H5I_FILE))) {
	    H5F_close_all();
	} else if (0==(n=H5I_nmembers(H5I_FILE_CLOSING))) {
	    H5I_destroy_group(H5I_FILE);
	    H5I_destroy_group(H5I_FILE_CLOSING);
	    interface_initialize_g = 0;
	    n = 1; /*H5I*/
	}
    }
    FUNC_LEAVE(n);
}


/*----------------------------------------------------------------------------
 * Function:	H5F_acs_create
 * 
 * Purpose:	Callback routine which is called whenever a file access 
 *		property list is closed.  This routine performs any generic
 * 		initialization needed on the properties the library put into
 * 		the list.
 *		
 * Return:	Success:		Non-negative
 * 		Failure:		Negative
 * 
 * Programmer:	Raymond Lu
 *		Tuesday, Oct 23, 2001
 *
 * Modifications:
 *
 *----------------------------------------------------------------------------
 */
herr_t 
H5F_acs_create(hid_t fapl_id, void UNUSED *copy_data)
{
    hid_t          driver_id;
    void*          driver_info;
    H5P_genplist_t *plist;              /* Property list */
    herr_t         ret_value = SUCCEED;

    FUNC_ENTER_NOAPI(H5F_acs_create, FAIL);

    /* Check argument */
    if(NULL == (plist = H5P_object_verify(fapl_id,H5P_FILE_ACCESS)))
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a property list");

    /* Retrieve properties */
    if(H5P_get(plist, H5F_ACS_FILE_DRV_ID_NAME, &driver_id) < 0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get drver ID");
    if(H5P_get(plist, H5F_ACS_FILE_DRV_INFO_NAME, &driver_info) < 0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get drver info");
    
    if(driver_id > 0) {
        /* Increment the reference count on driver and copy driver info */
        H5I_inc_ref(driver_id);
        driver_info = H5FD_fapl_copy(driver_id, driver_info);

        /* Set the driver properties for the list */
        if(H5P_set(plist, H5F_ACS_FILE_DRV_ID_NAME, &driver_id) < 0)
            HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set drver ID");
        if(H5P_set(plist, H5F_ACS_FILE_DRV_INFO_NAME, &driver_info) < 0)
            HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set drver info");
    } /* end if */

done:
    FUNC_LEAVE(ret_value);
}


/*--------------------------------------------------------------------------
 * Function:	H5F_acs_close
 * 
 * Purpose:	Callback routine which is called whenever a file access 
 *		property list is closed.  This routine performs any generic 
 *		cleanup needed on the properties.
 *
 * Return:	Success:	Non-negative
 * 		
 * 		Failure:	Negative
 *
 * Programmer:	Raymond Lu
 *		Tuesday, Oct 23, 2001
 * 
 * Modifications:
 *
 *---------------------------------------------------------------------------
 */ 
herr_t 
H5F_acs_close(hid_t fapl_id, void UNUSED *close_data)
{
    hid_t      driver_id;
    void       *driver_info;
    H5P_genplist_t *plist;              /* Property list */
    herr_t     ret_value = SUCCEED;

    FUNC_ENTER_NOAPI(H5F_acs_close, FAIL);

    /* Check argument */
    if(NULL == (plist = H5P_object_verify(fapl_id,H5P_FILE_ACCESS)))
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a property list");

    if(H5P_get(plist, H5F_ACS_FILE_DRV_ID_NAME, &driver_id) < 0)
        HGOTO_DONE(FAIL); /* Can't return errors when library is shutting down */
    if(H5P_get(plist, H5F_ACS_FILE_DRV_INFO_NAME, &driver_info) < 0)
        HGOTO_DONE(FAIL); /* Can't return errors when library is shutting down */

    if(driver_id > 0) {
        /* Free memory for driver info and decrement reference count for driver */
        H5FD_fapl_free(driver_id, driver_info);
        H5I_dec_ref(driver_id);
        driver_info = NULL;
        driver_id   = -1;
        if(H5P_set(plist, H5F_ACS_FILE_DRV_ID_NAME, &driver_id) < 0)
	    HGOTO_DONE(FAIL); /* Can't return errors when library is shutting down */
        if(H5P_set(plist, H5F_ACS_FILE_DRV_INFO_NAME, &driver_info) < 0)
	    HGOTO_DONE(FAIL); /* Can't return errors when library is shutting down */
    }

done:
    FUNC_LEAVE(ret_value);
}


/*--------------------------------------------------------------------------
 * Function:	H5F_acs_copy
 *
 * Purpose:	Callback routine which is called whenever a file access 
 * 		property list is copied.  This routine performs any generic
 * 	 	copy needed on the properties.
 *
 * Return:	Success:	Non-negative
 * 		Failure:	Negative
 * Programmer:	Raymond Lu
 *		Tuesday, Oct 23, 2001
 *
 * Modifications:	
 *
 *--------------------------------------------------------------------------
 */	
herr_t 
H5F_acs_copy(hid_t new_fapl_id, hid_t old_fapl_id, void UNUSED *copy_data)
{
    hid_t          driver_id;
    void*          driver_info;
    H5P_genplist_t *new_plist;              /* New property list */
    H5P_genplist_t *old_plist;              /* Old property list */
    herr_t         ret_value = SUCCEED;

    FUNC_ENTER_NOAPI(H5F_acs_copy, FAIL);

    if(NULL == (new_plist = H5I_object_verify(new_fapl_id, H5I_GENPROP_LST)))
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list");
    if(NULL == (old_plist = H5I_object_verify(old_fapl_id, H5I_GENPROP_LST)))
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list");

    /* Get values from old property list */
    if(H5P_get(old_plist, H5F_ACS_FILE_DRV_ID_NAME, &driver_id) < 0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get drver ID");
    if(H5P_get(old_plist, H5F_ACS_FILE_DRV_INFO_NAME, &driver_info) < 0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get drver info");
    
    if(driver_id > 0) {
        H5I_inc_ref(driver_id);
        driver_info = H5FD_fapl_copy(driver_id, driver_info);
        if(H5P_set(new_plist, H5F_ACS_FILE_DRV_ID_NAME, &driver_id) < 0)
            HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set drver ID");
        if(H5P_set(new_plist, H5F_ACS_FILE_DRV_INFO_NAME, &driver_info) < 0)
            HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set drver info");
    } /* end if */

done:
    FUNC_LEAVE(ret_value);
}


/*-------------------------------------------------------------------------
 * Function:	H5F_flush_all_cb
 *
 * Purpose:	Callback function for H5F_flush_all().
 *
 * Return:	Always returns zero.
 *
 * Programmer:	Robb Matzke
 *              Friday, February 19, 1999
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
static int
H5F_flush_all_cb(H5F_t *f, hid_t UNUSED fid, const void *_invalidate)
{
    hbool_t	invalidate = *((const hbool_t*)_invalidate);

    FUNC_ENTER_NOINIT(H5F_flush_all_cb);

    H5F_flush(f, H5F_SCOPE_LOCAL, invalidate, FALSE, FALSE);

    FUNC_LEAVE(0);
}


/*-------------------------------------------------------------------------
 * Function:	H5F_flush_all
 *
 * Purpose:	Flush all open files. If INVALIDATE is true then also remove
 *		everything from the cache.
 *
 * Return:	Success:	Non-negative
 *
 *		Failure:	Negative
 *
 * Programmer:	Robb Matzke
 *              Thursday, February 18, 1999
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5F_flush_all(hbool_t invalidate)
{
    herr_t ret_value=SUCCEED;   /* Return value */

    FUNC_ENTER_NOAPI(H5F_flush_all, FAIL);

    H5I_search(H5I_FILE,(H5I_search_func_t)H5F_flush_all_cb,(void*)&invalidate);

done:
    FUNC_LEAVE(ret_value);
}


/*-------------------------------------------------------------------------
 * Function:	H5F_close_all
 *
 * Purpose:	Close all open files. Any file which has open object headers
 *		will be moved from the H5I_FILE group to the H5I_FILE_CLOSING
 *		group.
 *
 * Return:	Success:	Non-negative
 *
 *		Failure:	Negative
 *
 * Programmer:	Robb Matzke
 *              Friday, February 19, 1999
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5F_close_all(void)
{
    herr_t      ret_value=SUCCEED;       /* Return value */

    FUNC_ENTER_NOAPI(H5F_close_all, FAIL);

    if (H5I_clear_group(H5I_FILE, FALSE)<0)
	HGOTO_ERROR(H5E_FILE, H5E_CLOSEERROR, FAIL, "unable to close one or more files");

done:
    FUNC_LEAVE(ret_value);
}


/*--------------------------------------------------------------------------
 NAME
       H5F_encode_length_unusual -- encode an unusual length size
 USAGE
       void H5F_encode_length_unusual(f, p, l)
       const H5F_t *f;		   IN: pointer to the file record
       uint8_t **p;		IN: pointer to buffer pointer to encode length in
       uint8_t *l;		IN: pointer to length to encode

 ERRORS

 RETURNS
    none
 DESCRIPTION
    Encode non-standard (i.e. not 2, 4 or 8-byte) lengths in file meta-data.
--------------------------------------------------------------------------*/
void 
H5F_encode_length_unusual(const H5F_t *f, uint8_t **p, uint8_t *l)
{
    int		    i = (int)H5F_SIZEOF_SIZE(f)-1;

#ifdef WORDS_BIGENDIAN
    /*
     * For non-little-endian platforms, encode each byte in memory backwards.
     */
    for (/*void*/; i>=0; i--, (*p)++)*(*p) = *(l+i);
#else
    /* platform has little-endian integers */
    HDmemcpy(*p,l,(size_t)(i+1));
    *p+=(i+1);
#endif

}


/*-------------------------------------------------------------------------
 * Function:	H5Fget_create_plist
 *
 * Purpose:	Get an atom for a copy of the file-creation property list for
 *		this file. This function returns an atom with a copy of the
 *		properties used to create a file.
 *
 * Return:	Success:	template ID
 *
 *		Failure:	FAIL
 *
 * Programmer:	Unknown
 *
 * Modifications:
 *
 * 	Robb Matzke, 18 Feb 1998
 *	Calls H5P_copy_plist() to copy the property list and H5P_close() to free
 *	that property list if an error occurs.
 *
 *	Raymond Lu, Oct 14, 2001
 *	Changed to generic property list.
 *
 *-------------------------------------------------------------------------
 */
hid_t
H5Fget_create_plist(hid_t file_id)
{
    H5F_t		*file = NULL;
    H5P_genplist_t *plist;              /* Property list */
    hid_t		ret_value;

    FUNC_ENTER_API(H5Fget_create_plist, FAIL);
    H5TRACE1("i","i",file_id);

    /* check args */
    if (NULL==(file=H5I_object_verify(file_id, H5I_FILE)))
	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file");
    if(NULL == (plist = H5I_object(file->shared->fcpl_id)))
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a property list");
    
    /* Create the property list object to return */
    if((ret_value=H5P_copy_plist(plist)) < 0)
	HGOTO_ERROR(H5E_INTERNAL, H5E_CANTINIT, FAIL, "unable to copy file creation properties");
    
done:
    FUNC_LEAVE(ret_value);
}


/*-------------------------------------------------------------------------
 * Function:	H5Fget_access_plist
 *
 * Purpose:	Returns a copy of the file access property list of the
 *		specified file.
 *
 * Return:	Success:	Object ID for a copy of the file access
 *				property list.
 *
 *		Failure:	FAIL
 *
 * Programmer:	Robb Matzke
 *              Wednesday, February 18, 1998
 *
 * Modifications:
 *		Raymond Lu, Oct 23, 2001
 *		Changed file access property list to the new generic 
 * 		property list.
 * 		
 *-------------------------------------------------------------------------
 */
hid_t
H5Fget_access_plist(hid_t file_id)
{
    H5F_t		*f = NULL;
    H5P_genplist_t *new_plist;              /* New property list */
    H5P_genplist_t *old_plist;              /* Old property list */
    hid_t		ret_value = SUCCEED;
    void		*driver_info=NULL;   
 
    FUNC_ENTER_API(H5Fget_access_plist, FAIL);
    H5TRACE1("i","i",file_id);

    /* Check args */
    if (NULL==(f=H5I_object_verify(file_id, H5I_FILE)))
	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file");

    /* Make a copy of the default file access property list */
    if(NULL == (old_plist = H5I_object(H5P_LST_FILE_ACCESS_g)))
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a property list");
    if((ret_value=H5P_copy_plist(old_plist)) < 0)
	HGOTO_ERROR(H5E_INTERNAL, H5E_CANTINIT, FAIL, "can't copy file access property list");
    if(NULL == (new_plist = H5I_object(ret_value)))
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a property list");

    /* Copy properties of the file access property list */
    if(H5P_set(new_plist, H5F_ACS_META_CACHE_SIZE_NAME, &(f->shared->mdc_nelmts)) < 0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set meta data cache size");
    if(H5P_set(new_plist, H5F_ACS_DATA_CACHE_ELMT_SIZE_NAME, &(f->shared->rdcc_nelmts)) < 0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set data cache element size");
    if(H5P_set(new_plist, H5F_ACS_DATA_CACHE_BYTE_SIZE_NAME, &(f->shared->rdcc_nbytes)) < 0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set data cache byte size");

    if(H5P_set(new_plist, H5F_ACS_PREEMPT_READ_CHUNKS_NAME, &(f->shared->rdcc_w0)) < 0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set preempt read chunks");
    if(H5P_set(new_plist, H5F_ACS_ALIGN_THRHD_NAME, &(f->shared->threshold)) < 0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set alignment threshold");
    if(H5P_set(new_plist, H5F_ACS_ALIGN_NAME, &(f->shared->alignment)) < 0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set alignment");

    if(H5P_set(new_plist, H5F_ACS_GARBG_COLCT_REF_NAME, &(f->shared->gc_ref)) < 0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set garbage collect reference");
    if(H5P_set(new_plist, H5F_ACS_META_BLOCK_SIZE_NAME, &(f->shared->lf->def_meta_block_size)) < 0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set meta data cache size");
    if(H5P_set(new_plist, H5F_ACS_SIEVE_BUF_SIZE_NAME, &(f->shared->sieve_buf_size)) < 0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't sieve buffer size");
    if(H5P_set(new_plist, H5F_ACS_SDATA_BLOCK_SIZE_NAME, &(f->shared->lf->def_sdata_block_size)) < 0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set 'small data' cache size");

    if(H5P_set(new_plist, H5F_ACS_FILE_DRV_ID_NAME, &(f->shared->lf->driver_id)) < 0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set file driver ID");

    driver_info = H5FD_fapl_get(f->shared->lf);
    if(driver_info != NULL && H5P_set(new_plist, H5F_ACS_FILE_DRV_INFO_NAME, driver_info) < 0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set file driver info");

    if(f->shared->fc_degree == H5F_CLOSE_DEFAULT && H5P_set(new_plist, H5F_CLOSE_DEGREE_NAME, &(f->shared->lf->cls->fc_degree)) < 0) {
        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set file close degree"); 
    } else if(f->shared->fc_degree != H5F_CLOSE_DEFAULT && H5P_set(new_plist, H5F_CLOSE_DEGREE_NAME, &(f->shared->fc_degree)) < 0) {
        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set file close degree");   
    } 

done:
    FUNC_LEAVE(ret_value);
}


/*-------------------------------------------------------------------------
 * Function:	H5Fget_obj_count
 *
 * Purpose:	Public function returning the number of opened object IDs 
 *		(files, datasets, groups and datatypes) in the same file. 
 *
 * Return:	Non-negative on success; negative on failure.
 * 
 * Programmer:	Raymond Lu
 *		Wednesday, Dec 5, 2001
 *
 * Modification:
 *	
 *-------------------------------------------------------------------------
 */
herr_t
H5Fget_obj_count(hid_t file_id, unsigned types, unsigned *obj_id_count)
{
    H5F_t    *f=NULL;
    herr_t   ret_value;

    FUNC_ENTER_API(H5Fget_obj_counts, FAIL);
    H5TRACE3("e","iIu*Iu",file_id,types,obj_id_count);

    if( file_id != H5F_OBJ_ALL && (NULL==(f=H5I_object_verify(file_id,H5I_FILE))) )
        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "not a file id");
    if( (types&H5F_OBJ_ALL)==0)
        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "not an object type");
    assert(obj_id_count);

    ret_value = H5F_get_obj_count(f, types, obj_id_count);

done:
    FUNC_LEAVE(ret_value);
}


/*-------------------------------------------------------------------------
 * Function:    H5F_get_obj_count
 *
 * Purpose:	Private function return the number of opened object IDs
 *		(files, datasets, groups, datatypes) in the same file.
 *
 * Return:      Non-negative on success; negative on failure.
 *
 * Programmer:  Raymond Lu
 *              Wednesday, Dec 5, 2001
 *
 * Modification:
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5F_get_obj_count(H5F_t *f, unsigned types, unsigned *obj_id_count)
{
    herr_t   ret_value = SUCCEED;

    FUNC_ENTER_NOINIT(H5F_get_obj_count);

    *obj_id_count = 0;

    if(H5F_get_objects(f, types, NULL, obj_id_count) < 0)
        HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "can't get counts of opened file IDs and object IDs in the file");

done:
    FUNC_LEAVE(ret_value);
}


/*-------------------------------------------------------------------------
 * Function:	H5Fget_object_ids
 *
 * Purpose:	Public function to return a list of opened object IDs.
 *
 * Return:	Non-negative on success; negative on failure.
 *
 * Programmer:  Raymond Lu
 *              Wednesday, Dec 5, 2001
 *
 * Modification:
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5Fget_obj_ids(hid_t file_id, unsigned types, hid_t *oid_list)
{
    herr_t   ret_value;
    H5F_t    *f=NULL;

    FUNC_ENTER_API(H5Fget_obj_ids, FAIL);
    H5TRACE3("e","iIu*i",file_id,types,oid_list);

    if( file_id != H5F_OBJ_ALL && (NULL==(f=H5I_object_verify(file_id,H5I_FILE))) )
        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "not a file id");
    if( (types&H5F_OBJ_ALL)==0)
        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "not an object type");
    assert(oid_list);

    ret_value = H5F_get_obj_ids(f, types, oid_list);

done:
    FUNC_LEAVE(ret_value);
}


/*-------------------------------------------------------------------------
 * Function:    H5F_get_object_ids
 *
 * Purpose:     Private function to return a list of opened object IDs.
 *
 * Return:      Non-negative on success; negative on failure.   
 *      
 * Programmer:  Raymond Lu      
 *              Wednesday, Dec 5, 2001  
 *      
 * Modification:        
 *      
 *-------------------------------------------------------------------------
 */
herr_t
H5F_get_obj_ids(H5F_t *f, unsigned types, hid_t *oid_list)
{
    herr_t      ret_value = SUCCEED;
 
    FUNC_ENTER_NOINIT(H5F_get_obj_ids);

    if(H5F_get_objects(f, types, oid_list, NULL) < 0)
        HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "can't get object IDs opened in the file");  

done:
    FUNC_LEAVE(ret_value);
}


/*---------------------------------------------------------------------------
 * Function:	H5F_get_objects
 *
 * Purpose:	This function is called by H5F_get_obj_count or 
 *		H5F_get_obj_ids to get either number of object IDs or a 
 *		list of opened object IDs.
 * Return:	Non-negative on success; negative on failure. 
 *
 * Programmer:  Raymond Lu
 *              Wednesday, Dec 5, 2001
 *
 * Modification:
 *
 *---------------------------------------------------------------------------
 */
static herr_t
H5F_get_objects(H5F_t *f, unsigned types, hid_t *obj_id_list, 
		unsigned *obj_id_count)
{
    herr_t      ret_value = SUCCEED;
    H5F_olist_t *olist = NULL;

    FUNC_ENTER_NOINIT(H5F_get_object);

    olist = H5MM_malloc(sizeof(H5F_olist_t));
    olist->obj_id_list  = obj_id_list;
    olist->obj_id_count = obj_id_count;
    olist->list_index   = 0;
    /* Shared file structure is used to verify if file IDs refer to the same 
     * file. */
    if(f != NULL)
        olist->shared = f->shared;
    else
	olist->shared = NULL;

    /* Search through file IDs to count the number, and put their
     * IDs on the object list */
    if( (types & H5F_OBJ_FILE) && H5I_nmembers(H5I_FILE) > 0 ) {
        olist->obj_type = H5I_FILE;
        H5I_search(H5I_FILE, (H5I_search_func_t)H5F_get_objects_cb, olist);
    }

    /* Search through dataset IDs to count number of dataset, and put their 
     * IDs on the object list */
    if( (types & H5F_OBJ_DATASET) && H5I_nmembers(H5I_DATASET) > 0 ) {
        olist->obj_type = H5I_DATASET;
        H5I_search(H5I_DATASET, (H5I_search_func_t)H5F_get_objects_cb, olist);
    }

    /* Search through group IDs to count number of group, and put their 
     * IDs on the object list */
    if( (types & H5F_OBJ_GROUP) && H5I_nmembers(H5I_GROUP) > 0 ) {
        olist->obj_type = H5I_GROUP;
        H5I_search(H5I_GROUP, (H5I_search_func_t)H5F_get_objects_cb, olist);
    }

    /* Search through datatype IDs to count number of datatype, and put their 
     * IDs on the object list */
    if( (types & H5F_OBJ_DATATYPE) && H5I_nmembers(H5I_DATATYPE) > 0 ) {
        olist->obj_type = H5I_DATATYPE;
        H5I_search(H5I_DATATYPE, (H5I_search_func_t)H5F_get_objects_cb, olist);
    }

#ifdef LATER
done:
#endif /* LATER */
    if(olist!=NULL)
	H5MM_xfree(olist);
    FUNC_LEAVE(ret_value);
}


/*-------------------------------------------------------------------------
 * Function:	H5F_get_objects_cb 
 *
 * Purpose:	H5F_get_objects' callback function.  It verifies if an 
 * 		object is in the file, and either count it or put its ID
 *		on the list.
 *
 * Programmer:  Raymond Lu
 *              Wednesday, Dec 5, 2001
 *
 * Modification:
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5F_get_objects_cb(void *obj_ptr, hid_t obj_id, void *key)
{
    herr_t      ret_value = SUCCEED;
    H5F_olist_t *olist = key;
    H5G_entry_t *ent = NULL;
 
    FUNC_ENTER_NOINIT(H5F_get_objects_cb);

    assert(obj_ptr);
    assert(olist);

    /* Count file IDs */ 
    if(olist->obj_type == H5I_FILE) {
	if( !olist->shared || (olist->shared && ((H5F_t*)obj_ptr)->shared == 
	    olist->shared) ) {
            if(olist->obj_id_list) {
                olist->obj_id_list[olist->list_index] = obj_id;
		olist->list_index++;
	    }
	    if(olist->obj_id_count)
	    	(*olist->obj_id_count)++;
	}    
    } else { /* either count opened object IDs or put the IDs on the list */
    	switch(olist->obj_type) {
	    case H5I_GROUP:
	        ent = H5G_entof((H5G_t*)obj_ptr);
                break;
	    case H5I_DATASET:
	        ent = H5D_entof((H5D_t*)obj_ptr);
		break;
	    case H5I_DATATYPE:
	        ent = H5T_entof((H5T_t*)obj_ptr);
		break;
            default:
                HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL,
                              "unknown data object");
	}

    	if( (!olist->shared && olist->obj_type==H5I_DATATYPE && H5T_is_immutable((H5T_t*)obj_ptr)==FALSE) 
                || (!olist->shared && olist->obj_type!=H5I_DATATYPE) 
                || (ent && ent->file->shared == olist->shared) ) {
            if(olist->obj_id_list) {
            	olist->obj_id_list[olist->list_index] = obj_id;
		olist->list_index++;
	    }
	    if(olist->obj_id_count)
            	(*olist->obj_id_count)++;
    	}
    }

done:
    FUNC_LEAVE(ret_value); 
}


/*-------------------------------------------------------------------------
 * Function:    H5Fget_vfd_handle
 *
 * Purpose:     Returns a pointer to the file handle of the low-level file
 *              driver.
 *
 * Return:      Success:        non-negative value. 
 *
 *              Failture:       negative. 
 * 
 * Programmer:  Raymond Lu
 *              Sep. 16, 2002
 *
 * Modification:
 *
 *-------------------------------------------------------------------------
 */
herr_t H5Fget_vfd_handle(hid_t file_id, hid_t fapl, void** file_handle)
{
    H5F_t               *file=NULL;
    herr_t              ret_value;
    
    FUNC_ENTER_API(H5Fget_vfd_handle, NULL);

    /* Check args */
    assert(file_handle);
    if(NULL==(file=H5I_object_verify(file_id, H5I_FILE)))
        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "not a file id");

    ret_value=H5F_get_vfd_handle(file, fapl, file_handle);

done:
    FUNC_LEAVE(ret_value);
}


/*-------------------------------------------------------------------------
 * Function:    H5F_get_vfd_handle
 *
 * Purpose:     Returns a pointer to the file handle of the low-level file
 *              driver.  This is the private function for H5Fget_vfd_handle.
 *
 * Return:      Success:        Non-negative.
 *
 *              Failture:       negative.
 *
 * Programmer:  Raymond Lu
 *              Sep. 16, 2002
 *
 * Modification:
 *
 *-------------------------------------------------------------------------
 */
herr_t H5F_get_vfd_handle(H5F_t *file, hid_t fapl, void**file_handle) 
{
    herr_t ret_value;

    FUNC_ENTER_NOINIT(H5F_get_vfd_handle);

    assert(file_handle);
    if((ret_value=H5FD_get_vfd_handle(file->shared->lf, fapl, file_handle)) < 0)
        HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "can't get file handle for file driver");

done:
    FUNC_LEAVE(ret_value);
}


/*-------------------------------------------------------------------------
 * Function:	H5F_equal
 *
 * Purpose:	Compares NEEDLE to a file from the HAYSTACK.
 *
 * Return:	Success:	Returns positive if two files are equal,
 *				zero otherwise.
 *
 *		Failure:	Negative
 *
 * Programmer:	Robb Matzke
 *              Monday, August  2, 1999
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
static int
H5F_equal(void *_haystack, hid_t UNUSED id, const void *_needle)
{
    H5F_t		*haystack = (H5F_t*)_haystack;
    const H5FD_t	*needle = (const H5FD_t*)_needle;
    int		retval;
    
    FUNC_ENTER_NOINIT(H5F_equal);

    retval = (0==H5FD_cmp(haystack->shared->lf, needle));

    FUNC_LEAVE(retval);
}


/*-------------------------------------------------------------------------
 * Function:	H5F_locate_signature
 *
 * Purpose:	Finds the HDF5 boot block signature in a file.	The signature
 *		can appear at address 0, or any power of two beginning with
 *		512.
 *
 * Return:	Success:	The absolute format address of the signature.
 *
 *		Failure:	HADDR_UNDEF
 *
 * Programmer:	Robb Matzke
 *		Friday, November  7, 1997
 *
 * Modifications:
 *		Robb Matzke, 1999-08-02
 *		Rewritten to use the virtual file layer.
 *-------------------------------------------------------------------------
 */
static haddr_t
H5F_locate_signature(H5FD_t *file)
{
    haddr_t	    addr, eoa;
    uint8_t	    buf[H5F_SIGNATURE_LEN];
    unsigned	    n, maxpow;
    haddr_t         ret_value;       /* Return value */

    FUNC_ENTER_NOINIT(H5F_locate_signature);

    /* Find the least N such that 2^N is larger than the file size */
    if (HADDR_UNDEF==(addr=H5FD_get_eof(file)) ||
            HADDR_UNDEF==(eoa=H5FD_get_eoa(file)))
	HGOTO_ERROR(H5E_IO, H5E_CANTINIT, HADDR_UNDEF, "unable to obtain EOF/EOA value");
    for (maxpow=0; addr; maxpow++)
        addr>>=1;
    maxpow = MAX(maxpow, 9);

    /*
     * Search for the file signature at format address zero followed by
     * powers of two larger than 9.
     */
    for (n=8; n<maxpow; n++) {
	addr = (8==n) ? 0 : (haddr_t)1 << n;
	if (H5FD_set_eoa(file, addr+H5F_SIGNATURE_LEN)<0)
	    HGOTO_ERROR(H5E_IO, H5E_CANTINIT, HADDR_UNDEF, "unable to set EOA value for file signature");
	if (H5FD_read(file, H5FD_MEM_SUPER, H5P_DATASET_XFER_DEFAULT, addr, H5F_SIGNATURE_LEN, buf)<0)
	    HGOTO_ERROR(H5E_IO, H5E_CANTINIT, HADDR_UNDEF, "unable to read file signature");
	if (!HDmemcmp(buf, H5F_SIGNATURE, H5F_SIGNATURE_LEN))
            break;
    }

    /*
     * If the signature was not found then reset the EOA value and return
     * failure.
     */
    if (n>=maxpow) {
	H5FD_set_eoa(file, eoa);
	HGOTO_ERROR(H5E_IO, H5E_CANTINIT, HADDR_UNDEF, "unable to find a valid file signature");
    }

    /* Set return value */
    ret_value=addr;

done:
    FUNC_LEAVE(ret_value);
}


/*-------------------------------------------------------------------------
 * Function:	H5Fis_hdf5
 *
 * Purpose:	Check the file signature to detect an HDF5 file.
 *
 * Bugs:	This function is not robust: it only uses the default file
 *		driver when attempting to open the file when in fact it
 *		should use all known file drivers.
 *
 * Return:	Success:	TRUE/FALSE
 *
 *		Failure:	Negative
 *
 * Programmer:	Unknown
 *
 * Modifications:
 *		Robb Matzke, 1999-08-02
 *		Rewritten to use the virtual file layer.
 *-------------------------------------------------------------------------
 */
htri_t
H5Fis_hdf5(const char *name)
{
    H5FD_t	*file = NULL;
    htri_t	ret_value;

    FUNC_ENTER_API(H5Fis_hdf5, FAIL);
    H5TRACE1("b","s",name);

    /* Check args and all the boring stuff. */
    if (!name || !*name)
	HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "no file name specified");

    /* Open the file at the virtual file layer */
    if (NULL==(file=H5FD_open(name, H5F_ACC_RDONLY, H5P_DEFAULT, HADDR_UNDEF)))
	HGOTO_ERROR(H5E_IO, H5E_CANTINIT, FAIL, "unable to open file");

    /* The file is an hdf5 file if the hdf5 file signature can be found */
    ret_value = (HADDR_UNDEF!=H5F_locate_signature(file));

done:
    /* Close the file */
    if (file)
        if(H5FD_close(file)<0 && ret_value>=0)
            HDONE_ERROR(H5E_IO, H5E_CANTCLOSEFILE, FAIL, "unable to close file");

    FUNC_LEAVE(ret_value);
}


/*-------------------------------------------------------------------------
 * Function:	H5F_new
 *
 * Purpose:	Creates a new file object and initializes it.  The
 *		H5Fopen and H5Fcreate functions then fill in various
 *		fields.	 If SHARED is a non-null pointer then the shared info
 *		to which it points has the reference count incremented.
 *		Otherwise a new, empty shared info struct is created and
 *		initialized with the specified file access property list.
 *
 * Errors:
 *
 * Return:	Success:	Ptr to a new file struct.
 *
 *		Failure:	NULL
 *
 * Programmer:	Robb Matzke
 *		matzke@llnl.gov
 *		Jul 18 1997
 *
 * Modifications:
 *
 *		Raymond Lu, Oct 14, 2001
 *		Changed the file creation and access property list to the 
 *		new generic property list.
 *
 *-------------------------------------------------------------------------
 */
static H5F_t *
H5F_new(H5F_file_t *shared, hid_t fcpl_id, hid_t fapl_id)
{
    H5F_t	*f=NULL, *ret_value;
    int		n;
    H5P_genplist_t *plist;              /* Property list */
 
    FUNC_ENTER_NOINIT(H5F_new);

    if (NULL==(f=H5FL_ALLOC(H5F_t,1)))
	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed");

    if (shared) {
	f->shared = shared;
    } else {
	f->shared = H5FL_ALLOC(H5F_file_t,1);
	f->shared->boot_addr = HADDR_UNDEF;
	f->shared->base_addr = HADDR_UNDEF;
	f->shared->freespace_addr = HADDR_UNDEF;
	f->shared->driver_addr = HADDR_UNDEF;
    
	/*
	 * Copy the file creation and file access property lists into the
	 * new file handle.  We do this early because some values might need
	 * to change as the file is being opened.
	 */
        if(H5P_DEFAULT == fcpl_id)
            fcpl_id = H5P_FILE_CREATE_DEFAULT;
        if(NULL == (plist = H5P_object_verify(fcpl_id,H5P_FILE_CREATE)))
            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "not property list");
        f->shared->fcpl_id = H5P_copy_plist(plist);


        if(H5P_DEFAULT == fapl_id)
            fapl_id = H5P_FILE_ACCESS_DEFAULT;
        if(NULL == (plist = H5P_object_verify(fapl_id,H5P_FILE_ACCESS)))
            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "not file access property list");

        if(H5P_get(plist, H5F_ACS_META_CACHE_SIZE_NAME, &(f->shared->mdc_nelmts)) < 0)
            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get meta data cache size");  
        if(H5P_get(plist, H5F_ACS_DATA_CACHE_ELMT_SIZE_NAME, &(f->shared->rdcc_nelmts)) < 0)
            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get data cache element size");  
        if(H5P_get(plist, H5F_ACS_DATA_CACHE_BYTE_SIZE_NAME, &(f->shared->rdcc_nbytes)) < 0)
            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get data cache cache size");  
        if(H5P_get(plist, H5F_ACS_PREEMPT_READ_CHUNKS_NAME, &(f->shared->rdcc_w0)) < 0)
            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get preempt read chunk");
  
        if(H5P_get(plist, H5F_ACS_ALIGN_THRHD_NAME, &(f->shared->threshold))<0)
            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get alignment threshold");  
        if(H5P_get(plist, H5F_ACS_ALIGN_NAME, &(f->shared->alignment)) < 0)
            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get alignment");  
        if(H5P_get(plist, H5F_ACS_GARBG_COLCT_REF_NAME,&(f->shared->gc_ref))<0)
            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get garbage collect reference");  
        if(H5P_get(plist, H5F_ACS_SIEVE_BUF_SIZE_NAME, &(f->shared->sieve_buf_size)) < 0)
            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get sieve buffer size");  

	/*
	 * Create a meta data cache with the specified number of elements.
	 * The cache might be created with a different number of elements and
	 * the access property list should be updated to reflect that.
	 */
	if ((n=H5AC_create(f, f->shared->mdc_nelmts))<0)
	    HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, NULL, "unable to create meta data cache");
	f->shared->mdc_nelmts = n;

	/* Create the chunk cache */
	H5F_istore_init(f);
    } /* end else */
    
    f->shared->nrefs++;
    f->nrefs = 1;

    /* Set return value */
    ret_value = f;

done:
    if (!ret_value && f) {
	if (!shared)
            H5FL_FREE(H5F_file_t,f->shared);
	H5FL_FREE(H5F_t,f);
    }
    
    FUNC_LEAVE(ret_value);
}


/*-------------------------------------------------------------------------
 * Function:	H5F_dest
 *
 * Purpose:	Destroys a file structure.  This function flushes the cache
 *		but doesn't do any other cleanup other than freeing memory
 *		for the file struct.  The shared info for the file is freed
 *		only when its reference count reaches zero.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Robb Matzke
 *		matzke@llnl.gov
 *		Jul 18 1997
 *
 * Modifications:
 *
 * 	Robb Matzke, 1998-10-14
 *	Nothing happens unless the reference count for the H5F_t goes to
 *	zero.  The reference counts are decremented here.
 *
 * 	Robb Matzke, 1999-02-19
 *	More careful about decrementing reference counts so they don't go
 *	negative or wrap around to some huge value.  Nothing happens if a
 *	reference count is already zero.
 *
 *      Robb Matzke, 2000-10-31
 *      H5FL_FREE() aborts if called with a null pointer (unlike the
 *      original H5MM_free()).
 *
 *      Pedro Vicente, <pvn@ncsa.uiuc.edu> 18 Sep 2002
 *      Added `id to name' support.
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5F_dest(H5F_t *f)
{
    herr_t	   ret_value = SUCCEED;
    
    FUNC_ENTER_NOINIT(H5F_dest);

    if (f && 1==f->nrefs) {
	if (1==f->shared->nrefs) {
	    /*
	     * Do not close the root group since we didn't count it, but free
	     * the memory associated with it.
	     */
	    if (f->shared->root_grp) {
                /* Free the ID to name buffer */
                H5G_free_grp_name(f->shared->root_grp);

                /* Free the memory for the root group */
                H5FL_FREE(H5G_t,f->shared->root_grp);
                f->shared->root_grp=NULL;
            }
	    if (H5AC_dest(f)) {
		HERROR(H5E_FILE, H5E_CANTINIT, "problems closing file");
		ret_value = FAIL; /*but keep going*/
	    }
	    if (H5F_istore_dest (f)<0) {
		HERROR(H5E_FILE, H5E_CANTINIT, "problems closing file");
		ret_value = FAIL; /*but keep going*/
	    }
	    f->shared->cwfs = H5MM_xfree (f->shared->cwfs);

            /* Free the data sieve buffer, if it's been allocated */
            if(f->shared->sieve_buf) {
                assert(f->shared->sieve_dirty==0);    /* The buffer had better be flushed... */
                f->shared->sieve_buf = H5FL_BLK_FREE (sieve_buf,f->shared->sieve_buf);
            } /* end if */

	    /* Destroy file creation properties */
            if(H5I_GENPROP_LST != H5I_get_type(f->shared->fcpl_id)) 
                HGOTO_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not a property list");
            if((ret_value=H5I_dec_ref(f->shared->fcpl_id)) < 0)
                HGOTO_ERROR(H5E_PLIST, H5E_CANTFREE, FAIL, "can't close property list");

	    /* Destroy shared file struct */
	    if (H5FD_close(f->shared->lf)<0) {
		HERROR(H5E_FILE, H5E_CANTINIT, "problems closing file");
		ret_value = FAIL; /*but keep going*/
	    }
	    f->shared = H5FL_FREE(H5F_file_t,f->shared);
	    
	} else if (f->shared->nrefs>0) {
	    /*
	     * There are other references to the shared part of the file.
	     * Only decrement the reference count.
	     */
	    --f->shared->nrefs;
	}

	/* Free the non-shared part of the file */
	f->name = H5MM_xfree(f->name);
	f->mtab.child = H5MM_xfree(f->mtab.child);
	f->mtab.nalloc = 0;
	H5FL_FREE(H5F_t,f);
    } else if (f && f->nrefs>0) {
	/*
	 * There are other references to this file. Only decrement the
	 * reference count.
	 */
	--f->nrefs;
    }

done:    
    FUNC_LEAVE(ret_value);
}


/*-------------------------------------------------------------------------
 * Function:	H5F_open
 *
 * Purpose:	Opens (or creates) a file.  This function understands the
 *		following flags which are similar in nature to the Posix
 *		open(2) flags.
 *
 *		H5F_ACC_RDWR:	Open with read/write access. If the file is
 *				currently open for read-only access then it
 *				will be reopened. Absence of this flag
 *				implies read-only access.
 *
 *		H5F_ACC_CREAT:	Create a new file if it doesn't exist yet.
 *				The permissions are 0666 bit-wise AND with
 *				the current umask.  H5F_ACC_WRITE must also
 *				be specified.
 *
 *		H5F_ACC_EXCL:	This flag causes H5F_open() to fail if the
 *				file already exists.
 *
 *		H5F_ACC_TRUNC:	The file is truncated and a new HDF5 superblock
 *				is written.  This operation will fail if the
 *				file is already open.
 *
 *		Unlinking the file name from the group directed graph while
 *		the file is opened causes the file to continue to exist but
 *		one will not be able to upgrade the file from read-only
 *		access to read-write access by reopening it. Disk resources
 *		for the file are released when all handles to the file are
 *		closed. NOTE: This paragraph probably only applies to Unix;
 *		deleting the file name in other OS's has undefined results.
 *
 *		The CREATE_PARMS argument is optional.	A null pointer will
 *		cause the default file creation parameters to be used.
 *
 *		The ACCESS_PARMS argument is optional.  A null pointer will
 *		cause the default file access parameters to be used.
 *
 * Return:	Success:	A new file pointer.
 *
 *		Failure:	NULL
 *
 * Programmer:	Robb Matzke
 *		Tuesday, September 23, 1997
 *
 * Modifications:
 *		Albert Cheng, 1998-02-05
 *		Added the access_parms argument to pass down access template
 *		information.
 *
 * 		Robb Matzke, 1998-02-18
 *		The H5F_access_t changed to allow more generality.  The low
 *		level driver is part of the file access template so the TYPE
 *		argument has been removed.
 *
 * 		Robb Matzke, 1999-08-02
 *		Rewritten to use the virtual file layer.
 *
 * 		Robb Matzke, 1999-08-16
 *		Added decoding of file driver information block, which uses a
 *		formerly reserved address slot in the boot block in order to
 *		be compatible with previous versions of the file format.
 *
 * 		Robb Matzke, 1999-08-20
 *		Optimizations for opening a file. If the driver can't
 *		determine when two file handles refer to the same file then
 *		we open the file in one step.  Otherwise if the first attempt
 *		to open the file fails then we skip the second attempt if the
 *		arguments would be the same.
 *
 *		Raymond Lu, 2001-10-14
 *		Changed the file creation and access property lists to the 
 *		new generic property list.
 *
 *-------------------------------------------------------------------------
 */
H5F_t *
H5F_open(const char *name, unsigned flags, hid_t fcpl_id, hid_t fapl_id)
{
    H5F_t		*file=NULL;	/*the success return value	*/
    H5F_t		*ret_value;     /*actual return value		*/
    H5F_file_t		*shared=NULL;	/*shared part of `file'		*/
    H5FD_t		*lf=NULL;	/*file driver part of `shared'	*/
    uint8_t		buf[256];	/*temporary I/O buffer		*/
    const uint8_t	*p;		/*ptr into temp I/O buffer	*/
    uint8_t	        *q;		/*ptr into temp I/O buffer	*/
    size_t		fixed_size=24;	/*fixed sizeof superblock	*/
    size_t		variable_size;	/*variable sizeof superblock	*/
    size_t		driver_size;	/*size of driver info block	*/
    H5G_entry_t		root_ent;	/*root symbol table entry	*/
    haddr_t		eof;		/*end of file address		*/
    haddr_t		stored_eoa;	/*relative end-of-addr in file	*/
    unsigned		tent_flags;	/*tentative flags		*/
    char		driver_name[9];	/*file driver name/version	*/
    hbool_t		driver_has_cmp;	/*`cmp' callback defined?	*/
    hsize_t             userblock_size = 0;
    int                 boot_vers;
    int                 freespace_vers;
    int                 obj_dir_vers;
    int                 share_head_vers;
    size_t              sizeof_addr = 0;
    size_t              sizeof_size = 0;
    unsigned            sym_leaf_k = 0;
    int                 btree_k[H5B_NUM_BTREE_ID];
    H5P_genplist_t      *c_plist;
    H5P_genplist_t      *a_plist;            /* Property list */
    H5F_close_degree_t  fc_degree;
    unsigned		chksum;         /* Checksum temporary variable */
    unsigned		i;              /* Index variable */

    FUNC_ENTER_NOAPI(H5F_open, NULL);

    /*
     * If the driver has a `cmp' method then the driver is capable of
     * determining when two file handles refer to the same file and the
     * library can insure that when the application opens a file twice that
     * the two handles coordinate their operations appropriately. Otherwise
     * it is the application's responsibility to never open the same file
     * more than once at a time.
     */
    driver_has_cmp = H5FD_has_cmp(fapl_id);

    /*
     * Opening a file is a two step process. First we try to open the file in
     * a way which doesn't affect its state (like not truncating or creating
     * it) so we can compare it with files that are already open. If that
     * fails then we try again with the full set of flags (only if they're
     * different than the original failed attempt). However, if the file
     * driver can't distinquish between files then there's no reason to open
     * the file tentatively because it's the application's responsibility to
     * prevent this situation (there's no way for us to detect it here
     * anyway).
     */
    if (driver_has_cmp) {
	tent_flags = flags & ~(H5F_ACC_CREAT|H5F_ACC_TRUNC|H5F_ACC_EXCL);
    } else {
	tent_flags = flags;
    }
    if (NULL==(lf=H5FD_open(name, tent_flags, fapl_id, HADDR_UNDEF))) {
	if (tent_flags == flags)
	    HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to open file");
	H5E_clear();
	tent_flags = flags;
	if (NULL==(lf=H5FD_open(name, tent_flags, fapl_id, HADDR_UNDEF)))
	    HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to open file");
    } /* end if */

    /* Is the file already open? */
    if ((file=H5I_search(H5I_FILE, H5F_equal, lf)) ||
            (file=H5I_search(H5I_FILE_CLOSING, H5F_equal, lf))) {
	/*
	 * The file is already open, so use that one instead of the one we
	 * just opened. We only one one H5FD_t* per file so one doesn't
	 * confuse the other.  But fail if this request was to truncate the
	 * file (since we can't do that while the file is open), or if the
	 * request was to create a non-existent file (since the file already
	 * exists), or if the new request adds write access (since the
	 * readers don't expect the file to change under them).
	 */
	H5FD_close(lf);
	if (flags & H5F_ACC_TRUNC) {
	    file = NULL; /*to prevent destruction of wrong file*/
	    HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to truncate a file which is already open");
	}
	if (flags & H5F_ACC_EXCL) {
	    file = NULL; /*to prevent destruction of wrong file*/
	    HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "file exists");
	}
	if ((flags & H5F_ACC_RDWR) && 0==(file->intent & H5F_ACC_RDWR)) {
	    file = NULL; /*to prevent destruction of wrong file*/
	    HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "file is already open for read-only");
	}
	file = H5F_new(file->shared, fcpl_id, fapl_id);
	lf = file->shared->lf;
    } else if (flags!=tent_flags) {
	/*
	 * This file is not yet open by the library and the flags we used to
	 * open it are different than the desired flags. Close the tentative
	 * file and open it for real.
	 */
	H5FD_close(lf);
	if (NULL==(lf=H5FD_open(name, flags, fapl_id, HADDR_UNDEF))) {
	    file = NULL; /*to prevent destruction of wrong file*/
	    HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to open file");
	}
	if (NULL==(file = H5F_new(NULL, fcpl_id, fapl_id)))
	    HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to create new file object");
	file->shared->flags = flags;
	file->shared->lf = lf;
    } else {
	/*
	 * This file is not yet open by the library and our tentative opening
	 * above is good enough.
	 */
	if (NULL==(file = H5F_new(NULL, fcpl_id, fapl_id)))
	    HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to create new file object");
	file->shared->flags = flags;
	file->shared->lf = lf;
    }

    /* Short cuts */
    shared = file->shared;
    lf = shared->lf;

    /*
     * The intent at the top level file struct are not necessarily the same as
     * the flags at the bottom.	 The top level describes how the file can be
     * accessed through the HDF5 library.  The bottom level describes how the
     * file can be accessed through the C library.
     */
    file->intent = flags;
    file->name = H5MM_xstrdup(name);

    /* Get the shared file creation property list */
    if(NULL == (c_plist = H5I_object(shared->fcpl_id)))
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "can't get property list");

    /*
     * Read or write the file superblock, depending on whether the file is
     * empty or not.
     */
    if (0==H5FD_get_eof(lf) && (flags & H5F_ACC_RDWR)) {
	/*
	 * The superblock starts immediately after the user-defined header,
	 * which we have already insured is a proper size.  The base address
	 * is set to the same thing as the superblock for now.
	 */
        if(H5P_get(c_plist, H5F_CRT_USER_BLOCK_NAME, &userblock_size) < 0)
            HGOTO_ERROR(H5E_FILE, H5E_CANTGET, NULL, "unable to get user block size");
        shared->boot_addr = userblock_size;
	shared->base_addr = shared->boot_addr;
	shared->consist_flags = 0x03;
	if (H5F_flush(file, H5F_SCOPE_LOCAL, FALSE, TRUE,FALSE)<0)
	    HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, NULL, "unable to write file superblock");

	/* Create and open the root group */
	if (H5G_mkroot(file, NULL)<0)
	    HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, NULL, "unable to create/open root group");
	
    } else if (1==shared->nrefs) {
	/* Read the superblock if it hasn't been read before. */
	if (HADDR_UNDEF==(shared->boot_addr=H5F_locate_signature(lf)))
	    HGOTO_ERROR(H5E_FILE, H5E_NOTHDF5, NULL, "unable to find file signature");
	if (H5FD_set_eoa(lf, shared->boot_addr+fixed_size)<0 ||
                H5FD_read(lf, H5FD_MEM_SUPER, H5P_DATASET_XFER_DEFAULT, shared->boot_addr, fixed_size, buf)<0)
	    HGOTO_ERROR(H5E_FILE, H5E_READERROR, NULL, "unable to read superblock");

	/* Signature, already checked */
	p = buf + H5F_SIGNATURE_LEN;

	/* Superblock version */
        boot_vers = *p++;
        if(HDF5_BOOTBLOCK_VERSION != boot_vers) 
            HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, NULL, "bad superblock version number");
        if(H5P_set(c_plist, H5F_CRT_BOOT_VERS_NAME, &boot_vers) < 0)
            HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, NULL, "unable to set boot version");

	/* Freespace version */
        freespace_vers = *p++;
        if(HDF5_FREESPACE_VERSION != freespace_vers) 
            HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, NULL, "bad free space version number");
        if(H5P_set(c_plist, H5F_CRT_FREESPACE_VERS_NAME, &freespace_vers)<0)
            HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, NULL, "unable to free space version");        

	/* Root group version number */
        obj_dir_vers = *p++;
        if(HDF5_OBJECTDIR_VERSION != obj_dir_vers) 
            HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, NULL, "bad object directory version number");
        if(H5P_set(c_plist, H5F_CRT_OBJ_DIR_VERS_NAME, &obj_dir_vers) < 0)
            HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, NULL, "unable to set object directory version");

	/* reserved */
	p++;

	/* Shared header version number */
        share_head_vers = *p++;
        if(HDF5_SHAREDHEADER_VERSION != share_head_vers) 
            HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, NULL, "bad shared-header format version number");
        if(H5P_set(c_plist, H5F_CRT_SHARE_HEAD_VERS_NAME, &share_head_vers) < 0)
            HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, NULL, "unable to set shared-header format version");

	/* Size of file addresses */
        sizeof_addr = *p++;
	if (sizeof_addr != 2 && sizeof_addr != 4 &&
                sizeof_addr != 8 && sizeof_addr != 16 && sizeof_addr != 32)
	    HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, NULL, "bad byte number in an address");
        if(H5P_set(c_plist, H5F_CRT_ADDR_BYTE_NUM_NAME,&sizeof_addr)<0)
            HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, NULL, "unable to set byte number in an address");

	/* Size of file sizes */
        sizeof_size = *p++;
	if (sizeof_size != 2 && sizeof_size != 4 &&
                sizeof_size != 8 && sizeof_size != 16 && sizeof_size != 32)
	    HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, NULL, "bad byte number for object size");
        if(H5P_set(c_plist, H5F_CRT_OBJ_BYTE_NUM_NAME, &sizeof_size)<0)
            HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, NULL, "unable to set byte number for object size");
	
	/* Reserved byte */
	p++;

	/* Various B-tree sizes */
	UINT16DECODE(p, sym_leaf_k);
	if(sym_leaf_k < 1)
	    HGOTO_ERROR(H5E_FILE, H5E_BADRANGE, NULL, "bad symbol table leaf node 1/2 rank");
        if(H5P_set(c_plist, H5F_CRT_SYM_LEAF_NAME, &sym_leaf_k)<0)
            HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, NULL, "unable to set rank for symbol table leaf nodes");

	/* Need 'get' call to set other array values */
        if(H5P_get(c_plist, H5F_CRT_BTREE_RANK_NAME, btree_k)<0)
            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "unable to get rank for btree internal nodes");        
	UINT16DECODE(p, btree_k[H5B_SNODE_ID]);
	if(btree_k[H5B_SNODE_ID] < 1)
	    HGOTO_ERROR(H5E_FILE, H5E_BADRANGE, NULL, "bad 1/2 rank for btree internal nodes");
        if(H5P_set(c_plist, H5F_CRT_BTREE_RANK_NAME, btree_k)<0)
            HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, NULL, "unable to set rank for btree internal nodes");

	/* File consistency flags. Not really used yet */
	UINT32DECODE(p, shared->consist_flags);
	assert((hsize_t)(p-buf) == fixed_size);

	/* Decode the variable-length part of the superblock... */
	variable_size = H5F_SIZEOF_ADDR(file) +		/*base addr*/
			H5F_SIZEOF_ADDR(file) +		/*global free list*/
			H5F_SIZEOF_ADDR(file) +		/*end-of-address*/
			H5F_SIZEOF_ADDR(file) +		/*reserved address*/
			H5G_SIZEOF_ENTRY(file);		/*root group ptr*/
	assert(variable_size<=sizeof(buf));
	if (H5FD_set_eoa(lf, shared->boot_addr+fixed_size+variable_size)<0 ||
                H5FD_read(lf, H5FD_MEM_SUPER, H5P_DATASET_XFER_DEFAULT, shared->boot_addr+fixed_size, variable_size, &buf[fixed_size])<0)
	    HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to read superblock");
	H5F_addr_decode(file, &p, &(shared->base_addr)/*out*/);
	H5F_addr_decode(file, &p, &(shared->freespace_addr)/*out*/);
	H5F_addr_decode(file, &p, &stored_eoa/*out*/);
	H5F_addr_decode(file, &p, &(shared->driver_addr)/*out*/);
	if (H5G_ent_decode(file, &p, &root_ent/*out*/)<0)
	    HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to read root symbol entry");

        /* Compute boot block checksum */
        assert(sizeof(chksum)==sizeof(shared->boot_chksum));
        for(q=(uint8_t *)&chksum, chksum=0, i=0; i<(fixed_size+variable_size); i++)
            q[i%sizeof(shared->boot_chksum)] ^= buf[i];

        /* Set the boot block checksum */
        shared->boot_chksum=chksum;

	/* Decode the optional driver information block */
	if (H5F_addr_defined(shared->driver_addr)) {
	    haddr_t drv_addr = shared->base_addr + shared->driver_addr;
	    if (H5FD_set_eoa(lf, drv_addr+16)<0 ||
                    H5FD_read(lf, H5FD_MEM_SUPER, H5P_DATASET_XFER_DEFAULT, drv_addr, 16, buf)<0)
		HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to read driver information block");
	    p = buf;

	    /* Version number */
	    if (HDF5_DRIVERINFO_VERSION!=*p++)
		HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "bad driver information block version number");

	    /* Reserved */
	    p += 3;

	    /* Driver info size */
	    UINT32DECODE(p, driver_size);

	    /* Driver name and/or version */
	    HDstrncpy(driver_name, (const char *)p, 8);
	    driver_name[8] = '\0';

	    /* Read driver information and decode */
	    if (H5FD_set_eoa(lf, drv_addr+16+driver_size)<0 ||
                    H5FD_read(lf, H5FD_MEM_SUPER, H5P_DATASET_XFER_DEFAULT, drv_addr+16, driver_size, &buf[16])<0)
		HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to read file driver information");
	    if (H5FD_sb_decode(lf, driver_name, &buf[16])<0)
		HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to decode driver information");

            /* Compute driver info block checksum */
            assert(sizeof(chksum)==sizeof(shared->drvr_chksum));
            for(q=(uint8_t *)&chksum, chksum=0, i=0; i<(driver_size+16); i++)
                q[i%sizeof(shared->drvr_chksum)] ^= buf[i];

            /* Set the driver info block checksum */
            shared->drvr_chksum=chksum;

	} /* end if */
	
	/* Make sure we can open the root group */
	if (H5G_mkroot(file, &root_ent)<0)
	    HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to read root group");

	/*
	 * The user-defined data is the area of the file before the base
	 * address.
	 */
        if(H5P_set(c_plist, H5F_CRT_USER_BLOCK_NAME, &(shared->base_addr)) < 0)
            HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, NULL, "unable to set usr block size");

	/*
	 * Make sure that the data is not truncated. One case where this is
	 * possible is if the first file of a family of files was opened
	 * individually.
	 */
        if (HADDR_UNDEF==(eof=H5FD_get_eof(lf)))
            HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to determine file size");
        if (eof<stored_eoa)
            HGOTO_ERROR(H5E_FILE, H5E_TRUNCATED, NULL, "truncated file");
        
	/*
	 * Tell the file driver how much address space has already been
	 * allocated so that it knows how to allocated additional memory.
	 */
	if (H5FD_set_eoa(lf, stored_eoa)<0)
	    HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to set end-of-address marker for file");
    }

    /* Decide the file close degree.  If it's the first time to open the
     * file, set the degree to access property list value; if it's the 
     * second time or later, verify the access property list value matches
     * the degree in shared file structure.
     */
    if(H5P_DEFAULT == fapl_id)
        fapl_id = H5P_FILE_ACCESS_DEFAULT;
    if(NULL == (a_plist = H5P_object_verify(fapl_id,H5P_FILE_ACCESS)))
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "not file access property list");
    if(H5P_get(a_plist, H5F_CLOSE_DEGREE_NAME, &fc_degree) < 0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get file close degree");  

    if(shared->nrefs == 1) {
        if(fc_degree == H5F_CLOSE_DEFAULT)
            shared->fc_degree = shared->lf->cls->fc_degree;
        else
            shared->fc_degree = fc_degree;
    } else if(shared->nrefs > 1) {
        if(fc_degree==H5F_CLOSE_DEFAULT && shared->fc_degree!=shared->lf->cls->fc_degree)
                HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, NULL, "file close degree doesn't match");
        if(fc_degree!=H5F_CLOSE_DEFAULT && fc_degree != shared->fc_degree)
                HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, NULL, "file close degree doesn't match");
    }
        
    /* Success */
    ret_value = file;

done:
    if (!ret_value && file)
        H5F_dest(file); /* Don't indicate error here, to leave the error stack with the correct error */
    FUNC_LEAVE(ret_value);
}


/*-------------------------------------------------------------------------
 * Function:	H5Fcreate
 *
 * Purpose:	This is the primary function for creating HDF5 files . The
 *		flags parameter determines whether an existing file will be
 *		overwritten or not.  All newly created files are opened for
 *		both reading and writing.  All flags may be combined with the
 *		bit-wise OR operator (`|') to change the behavior of the file
 *		create call.
 *
 *		The more complex behaviors of a file's creation and access
 *		are controlled through the file-creation and file-access
 *		property lists.  The value of H5P_DEFAULT for a template
 *		value indicates that the library should use the default
 *		values for the appropriate template.
 *
 * See also:	H5Fpublic.h for the list of supported flags. H5Ppublic.h for
 * 		the list of file creation and file access properties.
 *
 * Return:	Success:	A file ID
 *
 *		Failure:	FAIL
 *
 * Programmer:	Unknown
 *
 * Modifications:
 * 		Robb Matzke, 1997-07-18
 *		File struct creation and destruction is through H5F_new() and
 *		H5F_dest(). Writing the root symbol table entry is done with
 *		H5G_encode().
 *	
 *  		Robb Matzke, 1997-08-29
 *		Moved creation of the boot block to H5F_flush().
 *	
 *  		Robb Matzke, 1997-09-23
 *		Most of the work is now done by H5F_open() since H5Fcreate()
 *		and H5Fopen() originally contained almost identical code.
 *
 * 		Robb Matzke, 1998-02-18
 *		Better error checking for the creation and access property
 *		lists. It used to be possible to swap the two and core the
 *		library.  Also, zero is no longer valid as a default property
 *		list; one must use H5P_DEFAULT instead.
 *
 * 		Robb Matzke, 1999-08-02
 *		The file creation and file access property lists are passed
 *		to the H5F_open() as object IDs.
 *	
 *		Raymond Lu, 2001-10-14
 *              Changed the file creation and access property list to the 
 * 		new generic property list.
 *
 *-------------------------------------------------------------------------
 */
hid_t
H5Fcreate(const char *filename, unsigned flags, hid_t fcpl_id,
	  hid_t fapl_id)
{
    
    H5F_t	*new_file = NULL;	/*file struct for new file	*/
    hid_t	ret_value;	        /*return value			*/
 
    FUNC_ENTER_API(H5Fcreate, FAIL);
    H5TRACE4("i","sIuii",filename,flags,fcpl_id,fapl_id);

    /* Check/fix arguments */
    if (!filename || !*filename)
	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid file name");
    if (flags & ~(H5F_ACC_EXCL|H5F_ACC_TRUNC|H5F_ACC_DEBUG))
	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid flags");
    if ((flags & H5F_ACC_EXCL) && (flags & H5F_ACC_TRUNC))
	HGOTO_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "mutually exclusive flags for file creation");

    /* Check file creation property list */
    if(H5P_DEFAULT == fcpl_id)
        fcpl_id = H5P_FILE_CREATE_DEFAULT;
    if(TRUE != H5P_isa_class(fcpl_id, H5P_FILE_CREATE))
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not file create property list");

    /* Check the file access property list */
    if(H5P_DEFAULT == fapl_id)
        fapl_id = H5P_FILE_ACCESS_DEFAULT;
    if(TRUE != H5P_isa_class(fapl_id, H5P_FILE_ACCESS))
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not file access property list");

    /*
     * Adjust bit flags by turning on the creation bit and making sure that
     * the EXCL or TRUNC bit is set.  All newly-created files are opened for
     * reading and writing.
     */
    if (0==(flags & (H5F_ACC_EXCL|H5F_ACC_TRUNC)))
	flags |= H5F_ACC_EXCL;	 /*default*/
    flags |= H5F_ACC_RDWR | H5F_ACC_CREAT;

    /*
     * Create a new file or truncate an existing file.
     */
    if (NULL==(new_file=H5F_open(filename, flags, fcpl_id, fapl_id)))
	HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, FAIL, "unable to create file");
    
    /* Get an atom for the file */
    if ((ret_value = H5I_register(H5I_FILE, new_file))<0)
	HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to atomize file");

done:
    if (ret_value<0 && new_file)
        H5F_close(new_file);
    FUNC_LEAVE(ret_value);
}


/*-------------------------------------------------------------------------
 * Function:	H5Fopen
 *
 * Purpose:	This is the primary function for accessing existing HDF5
 *		files.  The FLAGS argument determines whether writing to an
 *		existing file will be allowed or not.  All flags may be
 *		combined with the bit-wise OR operator (`|') to change the
 *		behavior of the file open call.  The more complex behaviors
 *		of a file's access are controlled through the file-access
 *		property list.
 *
 * See Also:	H5Fpublic.h for a list of possible values for FLAGS.
 *
 * Return:	Success:	A file ID
 *
 *		Failure:	FAIL
 *
 * Programmer:	Unknown
 *
 * Modifications:
 *	  	Robb Matzke, 1997-07-18
 *		File struct creation and destruction is through H5F_new() and
 *		H5F_dest(). Reading the root symbol table entry is done with
 *		H5G_decode().
 *	
 *  		Robb Matzke, 1997-09-23
 *		Most of the work is now done by H5F_open() since H5Fcreate()
 *		and H5Fopen() originally contained almost identical code.
 *
 *	 	Robb Matzke, 1998-02-18
 *		Added better error checking for the flags and the file access
 *		property list.  It used to be possible to make the library
 *		dump core by passing an object ID that was not a file access
 *		property list.
 *
 * 		Robb Matzke, 1999-08-02
 *		The file access property list is passed to the H5F_open() as
 *		object IDs.
 *-------------------------------------------------------------------------
 */
hid_t
H5Fopen(const char *filename, unsigned flags, hid_t fapl_id)
{
    H5F_t	*new_file = NULL;	/*file struct for new file	*/
    hid_t	ret_value;	        /*return value			*/

    FUNC_ENTER_API(H5Fopen, FAIL);
    H5TRACE3("i","sIui",filename,flags,fapl_id);

    /* Check/fix arguments. */
    if (!filename || !*filename)
	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid file name");
    if ((flags & ~H5F_ACC_PUBLIC_FLAGS) ||
            (flags & H5F_ACC_TRUNC) || (flags & H5F_ACC_EXCL))
	HGOTO_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "invalid file open flags");
    if(H5P_DEFAULT == fapl_id)
        fapl_id = H5P_FILE_ACCESS_DEFAULT;
    if(TRUE != H5P_isa_class(fapl_id, H5P_FILE_ACCESS))
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not file access property list");

    /* Open the file */
    if (NULL==(new_file=H5F_open(filename, flags, H5P_DEFAULT, fapl_id)))
	HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, FAIL, "unable to open file");

    /* Get an atom for the file */
    if ((ret_value = H5I_register(H5I_FILE, new_file))<0)
	HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to atomize file handle");

done:
    if (ret_value<0 && new_file)
        H5F_close(new_file);
    FUNC_LEAVE(ret_value);
}


/*-------------------------------------------------------------------------
 * Function:	H5Fflush
 *
 * Purpose:	Flushes all outstanding buffers of a file to disk but does
 *		not remove them from the cache.  The OBJECT_ID can be a file,
 *		dataset, group, attribute, or named data type.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Robb Matzke
 *              Thursday, August  6, 1998
 *
 * Modifications:
 *
 * 		Robb Matzke, 1998-10-16
 *		Added the `scope' argument.
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5Fflush(hid_t object_id, H5F_scope_t scope)
{
    H5F_t	*f = NULL;
    H5G_t	*grp = NULL;
    H5T_t	*type = NULL;
    H5D_t	*dset = NULL;
    H5A_t	*attr = NULL;
    H5G_entry_t	*ent = NULL;
    herr_t      ret_value=SUCCEED;       /* Return value */
    
    FUNC_ENTER_API(H5Fflush, FAIL);
    H5TRACE2("e","iFs",object_id,scope);

    switch (H5I_get_type(object_id)) {
        case H5I_FILE:
            if (NULL==(f=H5I_object(object_id)))
                HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid file identifier");
            break;

        case H5I_GROUP:
            if (NULL==(grp=H5I_object(object_id)))
                HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid group identifier");
            ent = H5G_entof(grp);
            break;

        case H5I_DATATYPE:
            if (NULL==(type=H5I_object(object_id)))
                HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid type identifier");
            ent = H5T_entof(type);
            break;

        case H5I_DATASET:
            if (NULL==(dset=H5I_object(object_id)))
                HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid dataset identifier");
            ent = H5D_entof(dset);
            break;

        case H5I_ATTR:
            if (NULL==(attr=H5I_object(object_id)))
                HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid attribute identifier");
            ent = H5A_entof(attr);
            break;

        default:
            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file or file object");
    }

    if (!f) {
	if (!ent)
	    HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "object is not assocated with a file");
	f = ent->file;
    }
    if (!f)
	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "object is not associated with a file");

    /* Flush the file */
    if (H5F_flush(f, scope, FALSE, FALSE, FALSE)<0)
	HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "flush failed");

done:
    FUNC_LEAVE(ret_value);
}


/*-------------------------------------------------------------------------
 * Function:	H5F_flush
 *
 * Purpose:	Flushes (and optionally invalidates) cached data plus the
 *		file boot block.  If the logical file size field is zero
 *		then it is updated to be the length of the boot block.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Robb Matzke
 *		matzke@llnl.gov
 *		Aug 29 1997
 *
 * Modifications:
 *              rky 1998-08-28
 *		Only p0 writes metadata to disk.
 *
 * 		Robb Matzke, 1998-10-16
 *		Added the `scope' argument to indicate what should be
 *		flushed. If the value is H5F_SCOPE_GLOBAL then the entire
 *		virtual file is flushed; a value of H5F_SCOPE_LOCAL means
 *		that only the specified file is flushed.  A value of
 *		H5F_SCOPE_DOWN means flush the specified file and all
 *		children.
 *
 * 		Robb Matzke, 1999-08-02
 *		If ALLOC_ONLY is non-zero then all this function does is
 *		allocate space for the userblock and superblock. Also
 *		rewritten to use the virtual file layer.
 *
 * 		Robb Matzke, 1999-08-16
 *		The driver information block is encoded and either allocated
 *		or written to disk.
 *   
 *		Raymond Lu, 2001-10-14
 *              Changed to new generic property list.
 *   
 *		Quincey Koziol, 2002-05-20
 *              Added 'closing' parameter
 *
 *		Quincey Koziol, 2002-06-05
 *              Added boot block & driver info block checksumming, to avoid
 *              writing them out when they haven't changed.
 *
 *		Quincey Koziol, 2002-06-06
 *              Return the remainders of the metadata & "small data" blocks to
 *              the free list of blocks for the file.
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5F_flush(H5F_t *f, H5F_scope_t scope, hbool_t invalidate,
	  hbool_t alloc_only, hbool_t closing)
{
    uint8_t		sbuf[1024];     /* Superblock encoding buffer */
    uint8_t		dbuf[1024];     /* Driver info block encoding buffer */
    uint8_t		*p=NULL;        /* Temporary pointer into encoding buffers */
    unsigned		nerrors=0;      /* Errors from nested flushes */
    unsigned		i;              /* Index variable */
    unsigned		chksum;         /* Checksum temporary variable */
    size_t		superblock_size;/* Size of superblock, in bytes */
    size_t		driver_size;    /* Size of driver info block, in bytes */
    char		driver_name[9]; /* Name of driver, for driver info block */
    int                 boot_vers;      /* Boot block version */
    int                 freespace_vers; /* Freespace info version */
    int                 obj_dir_vers;   /* Object header info version */
    int                 share_head_vers;/* Shared header info version */
    int                 btree_k[H5B_NUM_BTREE_ID];      /* B-tree size info */
    unsigned            sym_leaf_k;     /* Number of symbols in B-tree leafs */
    H5P_genplist_t *plist;              /* Property list */
    herr_t              ret_value;      /* Return value */
    
    FUNC_ENTER_NOINIT(H5F_flush);
	
    /*
     * Nothing to do if the file is read only.	This determination is made at
     * the shared open(2) flags level, implying that opening a file twice,
     * once for read-only and once for read-write, and then calling
     * H5F_flush() with the read-only handle, still causes data to be flushed.
     */
    if (0 == (H5F_ACC_RDWR & f->shared->flags))
	HGOTO_DONE(SUCCEED);

    /* Flush other stuff depending on scope */
    if (H5F_SCOPE_GLOBAL==scope) {
	while (f->mtab.parent)
            f = f->mtab.parent;
	scope = H5F_SCOPE_DOWN;
    }
    if (H5F_SCOPE_DOWN==scope) {
	for (i=0; i<f->mtab.nmounts; i++) {
	    if (H5F_flush(f->mtab.child[i].file, scope, invalidate, FALSE, closing)<0)
		nerrors++;
	}
    }

    /* Avoid flushing buffers & caches when alloc_only set */
    if(!alloc_only) {
        /* flush any cached compact storage raw data */
        if (H5D_flush(f)<0)
            HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush dataset cache");

        /* If we are invalidating everything (which only happens just before
         * the file closes), release the unused portion of the metadata and
         * "small data" blocks back to the free lists in the file.
         */
        if(invalidate) {
            if(f->shared->lf->feature_flags&H5FD_FEAT_AGGREGATE_METADATA) {
                /* Return the unused portion of the metadata block to a free list */
                if(f->shared->lf->eoma!=0)
                    if(H5FD_free(f->shared->lf,H5FD_MEM_DEFAULT,f->shared->lf->eoma,f->shared->lf->cur_meta_block_size)<0)
                        HGOTO_ERROR(H5E_VFL, H5E_CANTFREE, FAIL, "can't free metadata block");

                /* Reset metadata block information, just in case */
                f->shared->lf->eoma=0;
                f->shared->lf->cur_meta_block_size=0;
            } /* end if */
            if(f->shared->lf->feature_flags&H5FD_FEAT_AGGREGATE_SMALLDATA) {
                /* Return the unused portion of the "small data" block to a free list */
                if(f->shared->lf->eosda!=0)
                    if(H5FD_free(f->shared->lf,H5FD_MEM_DRAW,f->shared->lf->eosda,f->shared->lf->cur_sdata_block_size)<0)
                        HGOTO_ERROR(H5E_VFL, H5E_CANTFREE, FAIL, "can't free 'small data' block");

                /* Reset "small data" block information, just in case */
                f->shared->lf->eosda=0;
                f->shared->lf->cur_sdata_block_size=0;
            } /* end if */
        } /* end if */

        /* flush the data sieve buffer, if we have a dirty one */
        if(f->shared->sieve_buf && f->shared->sieve_dirty) {
            /* Write dirty data sieve buffer to file */
            if (H5F_block_write(f, H5FD_MEM_DRAW, f->shared->sieve_loc, f->shared->sieve_size, H5P_DATASET_XFER_DEFAULT, f->shared->sieve_buf)<0)
                HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "block write failed");

            /* Reset sieve buffer dirty flag */
            f->shared->sieve_dirty=0;
        } /* end if */

        /* flush the entire raw data cache */
        if (H5F_istore_flush (f, invalidate)<0)
            HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush raw data cache");
        
        /* flush (and invalidate) the entire meta data cache */
        if (H5AC_flush(f, NULL, HADDR_UNDEF, invalidate)<0)
            HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush meta data cache");
    } /* end if */

    /* Get the shared file creation property list */
    if(NULL == (plist = H5I_object(f->shared->fcpl_id)))
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a property list");

    if(H5P_get(plist, H5F_CRT_BOOT_VERS_NAME, &boot_vers) < 0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "unable to get boot block version");
    if(H5P_get(plist, H5F_CRT_FREESPACE_VERS_NAME, &freespace_vers) < 0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "unable to get free space version");
    if(H5P_get(plist, H5F_CRT_OBJ_DIR_VERS_NAME, &obj_dir_vers) < 0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "unable to get object directory version");
    if(H5P_get(plist, H5F_CRT_SHARE_HEAD_VERS_NAME, &share_head_vers) < 0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "unable to get shared-header format version");
    if(H5P_get(plist, H5F_CRT_SYM_LEAF_NAME, &sym_leaf_k) < 0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "unable to get rank for symbol table leaf nodes");
    if(H5P_get(plist, H5F_CRT_BTREE_RANK_NAME, btree_k) < 0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "unable to get rank for btree internal nodes");

    /* encode the file boot block */
    p = sbuf;
    HDmemcpy(p, H5F_SIGNATURE, H5F_SIGNATURE_LEN);
    p += H5F_SIGNATURE_LEN;
    *p++ = boot_vers;
    *p++ = freespace_vers;
    *p++ = obj_dir_vers;
    *p++ = 0;			/*reserved*/
    *p++ = share_head_vers;
    assert (H5F_SIZEOF_ADDR(f)<=255);
    *p++ = (uint8_t)H5F_SIZEOF_ADDR(f);
    assert (H5F_SIZEOF_SIZE(f)<=255);
    *p++ = (uint8_t)H5F_SIZEOF_SIZE(f);
    *p++ = 0;			/*reserved */
    UINT16ENCODE(p, sym_leaf_k);
    UINT16ENCODE(p, btree_k[H5B_SNODE_ID]);
    UINT32ENCODE(p, f->shared->consist_flags);    
    H5F_addr_encode(f, &p, f->shared->base_addr);
    H5F_addr_encode(f, &p, f->shared->freespace_addr);
    H5F_addr_encode(f, &p, H5FD_get_eoa(f->shared->lf));
    H5F_addr_encode(f, &p, f->shared->driver_addr);
    H5G_ent_encode(f, &p, H5G_entof(f->shared->root_grp));
    superblock_size = p-sbuf;

    /* Double check we didn't overrun the block (unlikely) */
    assert(superblock_size<=sizeof(sbuf));

    /*
     * Encode the driver information block.
     */
    H5_ASSIGN_OVERFLOW(driver_size,H5FD_sb_size(f->shared->lf),hsize_t,size_t);
    if (driver_size>0) {
	driver_size += 16; /*driver block header */
	assert(driver_size<=sizeof(dbuf));
	p = dbuf;

	/* Version */
	*p++ = HDF5_DRIVERINFO_VERSION;

	/* Reserved*/
	p += 3;

	/* Driver info size, excluding header */
	UINT32ENCODE(p, driver_size-16);

	/* Encode driver-specific data */
	if (H5FD_sb_encode(f->shared->lf, driver_name, dbuf+16)<0)
	    HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "unable to encode driver information");

	/* Driver name */
	HDmemcpy(dbuf+8, driver_name, 8);

        /* Double check we didn't overrun the block (unlikely) */
        assert(driver_size<=sizeof(dbuf));
    } /* end if */

    if (alloc_only) {
	haddr_t addr;
	/*
	 * Allocate space for the userblock, superblock, and driver info
	 * block. We do it with one allocation request because the userblock
	 * and superblock need to be at the beginning of the file and only
	 * the first allocation request is required to return memory at
	 * format address zero.
	 */
        H5_CHECK_OVERFLOW(f->shared->base_addr,haddr_t,hsize_t);
	addr = H5FD_alloc(f->shared->lf, H5FD_MEM_SUPER,
              ((hsize_t)f->shared->base_addr + superblock_size + driver_size));
	if (HADDR_UNDEF==addr)
	    HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "unable to allocate file space for userblock and/or superblock");
	if (0!=addr)
	    HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "file driver failed to allocate userblock and/or superblock at address zero");
	
	/*
	 * The file driver information block begins immediately after the
	 * superblock.
	 */
	if (driver_size>0)
	    f->shared->driver_addr = superblock_size;
	
    } else {
        /* Compute boot block checksum */
        assert(sizeof(chksum)==sizeof(f->shared->boot_chksum));
        for(p=(uint8_t *)&chksum, chksum=0, i=0; i<superblock_size; i++)
            p[i%sizeof(f->shared->boot_chksum)] ^= sbuf[i];

        /* Compare with current checksums */
        if(chksum!=f->shared->boot_chksum) {
            /* Write superblock */
            if (H5FD_write(f->shared->lf, H5FD_MEM_SUPER, H5P_DATASET_XFER_DEFAULT, f->shared->boot_addr, superblock_size, sbuf)<0)
                HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "unable to write superblock");

            /* Update checksum information if different */
            f->shared->boot_chksum=chksum;
        } /* end if */

	/* Check for driver info block */
	if (HADDR_UNDEF!=f->shared->driver_addr) {
            /* Compute driver info block checksum */
            assert(sizeof(chksum)==sizeof(f->shared->drvr_chksum));
            for(p=(uint8_t *)&chksum, chksum=0, i=0; i<driver_size; i++)
                p[i%sizeof(f->shared->drvr_chksum)] ^= dbuf[i];

            /* Compare with current checksums */
            if(chksum!=f->shared->boot_chksum) {
                /* Write driver information block */
                if (H5FD_write(f->shared->lf, H5FD_MEM_SUPER, H5P_DATASET_XFER_DEFAULT, f->shared->base_addr+superblock_size, driver_size, dbuf)<0)
                    HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "unable to write driver information block");

                /* Update checksum information if different */
                f->shared->drvr_chksum=chksum;
            } /* end if */
	} /* end if */
    } /* end else */

    /* Flush file buffers to disk */
    if (!alloc_only && H5FD_flush(f->shared->lf,closing)<0)
	HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "low level flush failed");

    /* Check flush errors for children - errors are already on the stack */
    ret_value= (nerrors ? FAIL : SUCCEED);

done:
    FUNC_LEAVE(ret_value);
} /* end H5F_flush() */


/*-------------------------------------------------------------------------
 * Function:	H5F_close
 *
 * Purpose:	Closes a file or causes the close operation to be pended.
 *		This function is called two ways: from the API it gets called
 *		by H5Fclose->H5I_dec_ref->H5F_close when H5I_dec_ref()
 *		decrements the file ID reference count to zero.  The file ID
 *		is removed from the H5I_FILE group by H5I_dec_ref() just
 *		before H5F_close() is called. If there are open object
 *		headers then the close is pended by moving the file to the
 *		H5I_FILE_CLOSING ID group (the f->closing contains the ID
 *		assigned to file).
 *
 *		This function is also called directly from H5O_close() when
 *		the last object header is closed for the file and the file
 *		has a pending close.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Robb Matzke
 *		Tuesday, September 23, 1997
 *
 * Modifications:
 * 		Robb Matzke, 1998-10-14
 *		Nothing happens unless the H5F_t reference count is one (the
 *		file is flushed anyway).  The reference count is decremented
 *		by H5F_dest().
 *
 * 		Robb Matzke, 1999-08-02
 *		Modified to use the virtual file layer.
 *-------------------------------------------------------------------------
 */
herr_t
H5F_close(H5F_t *f)
{
    H5F_close_degree_t	fc_degree;      /* What action to take when closing the last file ID for a file */
    hid_t		*oid_list;      /* List of IDs still open */
    unsigned		i;              /* Local index variable */
    unsigned	        closing=0;      /* Indicate that the file will be closed */
    herr_t	        ret_value = SUCCEED;    /* Return value */

    FUNC_ENTER_NOAPI(H5F_close, FAIL);

    assert(f->nrefs>0);

    /*
     * If this file is referenced more than once then just decrement the
     * count and return.
     */
    if (f->nrefs>1) {
	/* Decrement reference counts */
        if (H5F_dest(f)<0)
            HGOTO_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, FAIL, "problems closing file");
	HGOTO_DONE(SUCCEED);
    } /* end if */

    /* Double-check that this file should be closed */
    assert(1==f->nrefs);
    
    /* Get the close degree from the file */
    fc_degree = f->shared->fc_degree;

    /* if close degree if "semi" and there are objects left open and we are
     * holding open the file with this file ID, fail now */
    if(fc_degree==H5F_CLOSE_SEMI && f->nopen_objs>0 && f->shared->nrefs==1)
        HGOTO_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, FAIL, "can't close file, there are objects still open");

    /*
     * Unmount and close each child before closing the current file.
     */
    assert(NULL==f->mtab.parent);
    for (i=0; i<f->mtab.nmounts; i++) {
	f->mtab.child[i].file->mtab.parent = NULL;
	H5G_close(f->mtab.child[i].group);
	H5F_close(f->mtab.child[i].file);
    } /* end if */
    f->mtab.nmounts = 0;

    /* Close file according to close degree:
     *  H5F_CLOSE_WEAK:	if there are still objects open, wait until
     *			they are all closed.
     *  H5F_CLOSE_SEMI:	if there are still objects open, return fail;
     *			otherwise, close file.
     *  H5F_CLOSE_STRONG:	if there are still objects open, close them
     *			first, then close file. 
     */ 
    switch(fc_degree) {
        case H5F_CLOSE_WEAK:
            /*
             * If object headers are still open then delay deletion of 
             * resources until they have all been closed.  Flush all 
             * caches and update the object eader anyway so that failing toi
             * close all objects isn't a major problem. If the file is on 
             * the H5I_FILE list then move it to the H5I_FILE_CLOSING list 
             * instead.
             */ 
            if (f->nopen_objs>0) {
#ifdef H5F_DEBUG
                if (H5DEBUG(F)) {
                    fprintf(H5DEBUG(F), "H5F: H5F_close(%s): %u object header%s still "
                    "open (file close will complete when %s closed)\n",
                    f->name,
                    f->nopen_objs,
                    1 == f->nopen_objs?" is":"s are",
                    1 == f->nopen_objs?"that header is":"those headers are");
                }
#endif
                /* Register an ID for closing the file later */
                if (!f->closing)
                    f->closing  = H5I_register(H5I_FILE_CLOSING, f);
                HGOTO_DONE(SUCCEED);
            } else {
                if (f->closing) {

#ifdef H5F_DEBUG
                    if (H5DEBUG(F))
                        fprintf(H5DEBUG(F), "H5F: H5F_close: operation completing\n");
#endif
                } /* end if */

                /* Indicate that the file will be closing */
                closing=1;
            } /* end else */
            break;

        case H5F_CLOSE_SEMI:
            if (f->nopen_objs>0) {
#ifdef H5F_DEBUG
                if (H5DEBUG(F)) {
                    fprintf(H5DEBUG(F), "H5F: H5F_close(%s): %u object header%s still "
                    "open (file close will complete when %s closed)\n",
                    f->name,
                    f->nopen_objs,
                    1 == f->nopen_objs?" is":"s are",
                    1 == f->nopen_objs?"that header is":"those headers are");
                }
#endif
                /* Register an ID for closing the file later */
                if (!f->closing)
                    f->closing  = H5I_register(H5I_FILE_CLOSING, f);
                HGOTO_DONE(SUCCEED);
            } else {
                if (!f->closing && f->shared->nrefs>1)
                    HGOTO_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, FAIL, "can't close file, there are objects still open");

                /* Indicate that the file will be closing */
                closing=1;
            } /* end else */
            break;

        case H5F_CLOSE_STRONG:
            /* Forcefully close all opened objects in file */
            do {
                /* Allocate space for the IDs of objects still currently open */
                if((oid_list = H5MM_malloc(f->nopen_objs*sizeof(hid_t)))==NULL)
                    HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed");

                /* Get the list of IDs of open objects */
                if(H5F_get_obj_ids(f, H5F_OBJ_DATASET|H5F_OBJ_GROUP|H5F_OBJ_DATATYPE, oid_list) < 0)
                    HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "can't get object list in file");
               
                /* Try to close all the open objects */
                for(i=0; i<f->nopen_objs; i++)
                    if(H5I_dec_ref(oid_list[i]) < 0)
                        HGOTO_ERROR(H5E_ATOM, H5E_CLOSEERROR, FAIL, "can't close object");

                /* Free the ID list */
                if(oid_list != NULL)
                    H5MM_xfree(oid_list);
            } while(f->nopen_objs > 0);

            /* Indicate that the file will be closing */
            closing=1;
            break;

        default:
            HGOTO_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, FAIL, "can't close file, unknown file close degree"); 	
    } /* end switch */

    /* Only flush at this point if the file will be closed */
    if(closing) {
	/* Dump debugging info */
	H5AC_debug(f);
	H5F_istore_stats(f, FALSE);

	/* Flush and destroy all caches */
	if (H5F_flush(f, H5F_SCOPE_LOCAL, TRUE, FALSE, TRUE)<0)
	    HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush cache");
    } /* end if */

    /*
     * Destroy the H5F_t struct and decrement the reference count for the
     * shared H5F_file_t struct. If the reference count for the H5F_file_t
     * struct reaches zero then destroy it also.
     */
    if (H5F_dest(f)<0)
	HGOTO_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, FAIL, "problems closing file");

done:
    FUNC_LEAVE(ret_value);
} /* end H5F_close() */


/*-------------------------------------------------------------------------
 * Function:	H5Fclose
 *
 * Purpose:	This function closes the file specified by FILE_ID by
 *		flushing all data to storage, and terminating access to the
 *		file through FILE_ID.  If objects (e.g., datasets, groups,
 *		etc.) are open in the file then the underlying storage is not
 *		closed until those objects are closed; however, all data for
 *		the file and the open objects is flushed.
 *
 * Return:	Success:	Non-negative
 *
 *		Failure:	Negative
 *
 * Programmer:	Robb Matzke
 *              Saturday, February 20, 1999
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5Fclose(hid_t file_id)
{
    herr_t	ret_value = SUCCEED;
 
    FUNC_ENTER_API(H5Fclose, FAIL);
    H5TRACE1("e","i",file_id);

    /* Check/fix arguments. */
    if (NULL==H5I_object_verify(file_id,H5I_FILE))
	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file atom");

    /*
     * Decrement reference count on atom.  When it reaches zero the file will
     * be closed.
     */
    if (H5I_dec_ref (file_id)<0)
	HGOTO_ERROR (H5E_ATOM, H5E_CANTINIT, FAIL, "problems closing file");
    
done:
    FUNC_LEAVE(ret_value);
}


/*-------------------------------------------------------------------------
 * Function:	H5F_mount
 *
 * Purpose:	Mount file CHILD onto the group specified by LOC and NAME,
 *		using mount properties in PLIST.  CHILD must not already be
 *		mouted and must not be a mount ancestor of the mount-point.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Robb Matzke
 *              Tuesday, October  6, 1998
 *
 * Modifications:
 *
 * 	Robb Matzke, 1998-10-14
 *	The reference count for the mounted H5F_t is incremented.
 *
 *      Pedro Vicente, <pvn@ncsa.uiuc.edu> 22 Aug 2002
 *      Added `id to name' support.
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5F_mount(H5G_entry_t *loc, const char *name, H5F_t *child,
	  const hid_t UNUSED plist_id)
{
    H5G_t	*mount_point = NULL;	/*mount point group		*/
    H5G_entry_t	*mp_ent = NULL;		/*mount point symbol table entry*/
    H5F_t	*ancestor = NULL;	/*ancestor files		*/
    H5F_t	*parent = NULL;		/*file containing mount point	*/
    int	lt, rt, md, cmp;	/*binary search indices		*/
    H5G_entry_t	*ent = NULL;		/*temporary symbol table entry	*/
    herr_t	ret_value = SUCCEED;	/*return value			*/
    
    FUNC_ENTER_NOINIT(H5F_mount);

    assert(loc);
    assert(name && *name);
    assert(child);
    assert(TRUE==H5P_isa_class(plist_id,H5P_MOUNT));

    /*
     * Check that the child isn't mounted, that the mount point exists, and
     * that the mount wouldn't introduce a cycle in the mount tree.
     */
    if (child->mtab.parent)
	HGOTO_ERROR(H5E_FILE, H5E_MOUNT, FAIL, "file is already mounted");
    if (NULL==(mount_point=H5G_open(loc, name)))
	HGOTO_ERROR(H5E_FILE, H5E_MOUNT, FAIL, "mount point not found");

    parent = H5G_fileof(mount_point);
    mp_ent = H5G_entof(mount_point);
    for (ancestor=parent; ancestor; ancestor=ancestor->mtab.parent) {
	if (ancestor==child)
	    HGOTO_ERROR(H5E_FILE, H5E_MOUNT, FAIL, "mount would introduce a cycle");
    }
    
    /*
     * Use a binary search to locate the position that the child should be
     * inserted into the parent mount table.  At the end of this paragraph
     * `md' will be the index where the child should be inserted.
     */
    lt = md = 0;
    rt = parent->mtab.nmounts;
    cmp = -1;
    while (lt<rt && cmp) {
	md = (lt+rt)/2;
	ent = H5G_entof(parent->mtab.child[md].group);
	cmp = H5F_addr_cmp(mp_ent->header, ent->header);
	if (cmp<0) {
	    rt = md;
	} else if (cmp>0) {
	    lt = md+1;
	}
    }
    if (cmp>0)
        md++;
    if (!cmp)
	HGOTO_ERROR(H5E_FILE, H5E_MOUNT, FAIL, "mount point is already in use");
    
    /* Make room in the table */
    if (parent->mtab.nmounts>=parent->mtab.nalloc) {
	unsigned n = MAX(16, 2*parent->mtab.nalloc);
	H5F_mount_t *x = H5MM_realloc(parent->mtab.child,
				      n*sizeof(parent->mtab.child[0]));
	if (!x)
	    HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for mount table");
	parent->mtab.child = x;
	parent->mtab.nalloc = n;
    }

    /* Insert into table */
    HDmemmove(parent->mtab.child+md+1,
	      parent->mtab.child+md,
	      (parent->mtab.nmounts-md)*sizeof(parent->mtab.child[0]));
    parent->mtab.nmounts++;
    parent->mtab.child[md].group = mount_point;
    parent->mtab.child[md].file = child;
    child->mtab.parent = parent;
    child->nrefs++;

    /* Search the open IDs and replace names for mount operation */
    /* We pass H5G_UNKNOWN as object type; search all IDs */
    if (H5G_replace_name( H5G_UNKNOWN, loc, name, NULL, OP_MOUNT )<0)
	HGOTO_ERROR(H5E_FILE, H5E_MOUNT, FAIL, "unable to replace name");

done:
    if (ret_value<0 && mount_point)
	H5G_close(mount_point);

    FUNC_LEAVE(ret_value);
}


/*-------------------------------------------------------------------------
 * Function:	H5F_unmount
 *
 * Purpose:	Unmount the child which is mounted at the group specified by
 *		LOC and NAME or fail if nothing is mounted there.  Neither
 *		file is closed.
 *
 *		Because the mount point is specified by name and opened as a
 *		group, the H5G_namei() will resolve it to the root of the
 *		mounted file, not the group where the file is mounted.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Robb Matzke
 *              Tuesday, October  6, 1998
 *
 * Modifications:
 *
 *      Robb Matzke, 1998-10-14
 *      The ref count for the child is decremented by calling H5F_close().
 *
 *      Pedro Vicente, <pvn@ncsa.uiuc.edu> 22 Aug 2002
 *      Added `id to name' support.
 * 
 *-------------------------------------------------------------------------
 */
static herr_t
H5F_unmount(H5G_entry_t *loc, const char *name)
{
    H5G_t	*mounted = NULL;	/*mount point group		*/
    H5G_entry_t	*mnt_ent = NULL;	/*mounted symbol table entry	*/
    H5F_t	*child = NULL;		/*mounted file			*/
    H5F_t	*parent = NULL;		/*file where mounted		*/
    H5G_entry_t	*ent = NULL;		/*temporary symbol table entry	*/
    herr_t	ret_value = FAIL;	/*return value			*/
    unsigned	i;			/*coutners			*/
    int	lt, rt, md=(-1), cmp;	/*binary search indices		*/
    
    FUNC_ENTER_NOINIT(H5F_unmount);

    assert(loc);
    assert(name && *name);

    /*
     * Get the mount point, or more precisely the root of the mounted file.
     * If we get the root group and the file has a parent in the mount tree,
     * then we must have found the mount point.
     */
    if (NULL==(mounted=H5G_open(loc, name)))
	HGOTO_ERROR(H5E_FILE, H5E_MOUNT, FAIL, "mount point not found");
    child = H5G_fileof(mounted);
    mnt_ent = H5G_entof(mounted);
    ent = H5G_entof(child->shared->root_grp);

    if (child->mtab.parent &&
	H5F_addr_eq(mnt_ent->header, ent->header)) {
	/*
	 * We've been given the root group of the child.  We do a reverse
	 * lookup in the parent's mount table to find the correct entry.
	 */
	parent = child->mtab.parent;
	for (i=0; i<parent->mtab.nmounts; i++) {
	    if (parent->mtab.child[i].file==child) {
                /* Search the open IDs replace names to reflect unmount operation */
                if (H5G_replace_name( H5G_UNKNOWN, loc, name, NULL, OP_UNMOUNT )<0)
                    HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to replace name ");

		/* Unmount the child */
		parent->mtab.nmounts -= 1;
		H5G_close(parent->mtab.child[i].group);
		child->mtab.parent = NULL;
		H5F_close(child);
		HDmemmove(parent->mtab.child+i,
			  parent->mtab.child+i+1,
			  ((parent->mtab.nmounts-i)*
			   sizeof(parent->mtab.child[0])));
		ret_value = SUCCEED;
	    }
	}
	assert(ret_value>=0);
	
    } else {
	/*
	 * We've been given the mount point in the parent.  We use a binary
	 * search in the parent to locate the mounted file, if any.
	 */
	parent = child; /*we guessed wrong*/
	lt = 0;
	rt = parent->mtab.nmounts;
	cmp = -1;
	while (lt<rt && cmp) {
	    md = (lt+rt)/2;
	    ent = H5G_entof(parent->mtab.child[md].group);
	    cmp = H5F_addr_cmp(mnt_ent->header, ent->header);
	    if (cmp<0) {
		rt = md;
	    } else {
		lt = md+1;
	    }
	}
	if (cmp)
	    HGOTO_ERROR(H5E_FILE, H5E_MOUNT, FAIL, "not a mount point");

	/* Unmount the child */
	parent->mtab.nmounts -= 1;
	H5G_close(parent->mtab.child[md].group);
	parent->mtab.child[md].file->mtab.parent = NULL;
	H5F_close(parent->mtab.child[md].file);
	HDmemmove(parent->mtab.child+md,
		  parent->mtab.child+md+1,
		  (parent->mtab.nmounts-md)*sizeof(parent->mtab.child[0]));
	ret_value = SUCCEED;
    }
    
done:
    if (mounted)
        if(H5G_close(mounted)<0 && ret_value>=0)
	    HDONE_ERROR(H5E_FILE, H5E_MOUNT, FAIL, "can't close group");

    FUNC_LEAVE(ret_value);
}


/*-------------------------------------------------------------------------
 * Function:	H5F_mountpoint
 *
 * Purpose:	If ENT is a mount point then copy the entry for the root
 *		group of the mounted file into ENT.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Robb Matzke
 *              Tuesday, October  6, 1998
 *
 * Modifications:
 *
 *      Pedro Vicente, <pvn@ncsa.uiuc.edu> 22 Aug 2002
 *      Added `id to name' support.
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5F_mountpoint(H5G_entry_t *find/*in,out*/)
{
    H5F_t	*parent = find->file;
    int	lt, rt, md=(-1), cmp;
    H5G_entry_t	*ent = NULL;
    herr_t ret_value=SUCCEED;   /* Return value */
    
    FUNC_ENTER_NOAPI(H5F_mountpoint, FAIL);

    assert(find);

    /*
     * The loop is necessary because we might have file1 mounted at the root
     * of file2, which is mounted somewhere in file3.
     */
    do {
	/*
	 * Use a binary search to find the potential mount point in the mount
	 * table for the parent
	 */
	lt = 0;
	rt = parent->mtab.nmounts;
	cmp = -1;
	while (lt<rt && cmp) {
	    md = (lt+rt)/2;
	    ent = H5G_entof(parent->mtab.child[md].group);
	    cmp = H5F_addr_cmp(find->header, ent->header);
	    if (cmp<0) {
		rt = md;
	    } else {
		lt = md+1;
	    }
	}

	/* Copy root info over to ENT */
	if (0==cmp) {
            char *tmp_name, *tmp_old_name;     /* Temporary string pointers for entry's name and "old name"*/

            /* Get the entry for the root group in the child's file */
	    ent = H5G_entof(parent->mtab.child[md].file->shared->root_grp);

            /* Don't lose the name of the group when we copy the root group's entry */
            tmp_name = find->name;
            tmp_old_name = find->old_name;
	    *find = *ent;
            find->name = tmp_name;
            find->old_name = tmp_old_name;

            /* Switch to child's file */
	    parent = ent->file;
	}
    } while (!cmp);
    
done:
    FUNC_LEAVE(ret_value);
}


/*-------------------------------------------------------------------------
 * Function:	H5Fmount
 *
 * Purpose:	Mount file CHILD_ID onto the group specified by LOC_ID and
 *		NAME using mount properties PLIST_ID.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Robb Matzke
 *              Tuesday, October  6, 1998
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5Fmount(hid_t loc_id, const char *name, hid_t child_id, hid_t plist_id)
{
    H5G_entry_t		*loc = NULL;
    H5F_t		*child = NULL;
    herr_t      ret_value=SUCCEED;       /* Return value */
    
    FUNC_ENTER_API(H5Fmount, FAIL);
    H5TRACE4("e","isii",loc_id,name,child_id,plist_id);

    /* Check arguments */
    if (NULL==(loc=H5G_loc(loc_id)))
	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location");
    if (!name || !*name)
	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name");
    if (NULL==(child=H5I_object_verify(child_id,H5I_FILE)))
	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file");
    if(H5P_DEFAULT == plist_id)
        plist_id = H5P_MOUNT_DEFAULT;
    if(TRUE != H5P_isa_class(plist_id, H5P_MOUNT))
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not property list");

    /* Do the mount */
    if (H5F_mount(loc, name, child, plist_id)<0)
	HGOTO_ERROR(H5E_FILE, H5E_MOUNT, FAIL, "unable to mount file");

done:
    FUNC_LEAVE(ret_value);
}


/*-------------------------------------------------------------------------
 * Function:	H5Funmount
 *
 * Purpose:	Given a mount point, dissassociate the mount point's file
 *		from the file mounted there.  Do not close either file.
 *
 *		The mount point can either be the group in the parent or the
 *		root group of the mounted file (both groups have the same
 *		name).  If the mount point was opened before the mount then
 *		it's the group in the parent, but if it was opened after the
 *		mount then it's the root group of the child.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Robb Matzke
 *              Tuesday, October  6, 1998
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5Funmount(hid_t loc_id, const char *name)
{
    H5G_entry_t		*loc = NULL;
    herr_t      ret_value=SUCCEED;       /* Return value */
    
    FUNC_ENTER_API(H5Funmount, FAIL);
    H5TRACE2("e","is",loc_id,name);

    /* Check args */
    if (NULL==(loc=H5G_loc(loc_id)))
	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location");
    if (!name || !*name)
	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name");

    /* Unmount */
    if (H5F_unmount(loc, name)<0)
	HGOTO_ERROR(H5E_FILE, H5E_MOUNT, FAIL, "unable to unmount file");

done:
    FUNC_LEAVE(ret_value);
}


/*-------------------------------------------------------------------------
 * Function:	H5Freopen
 *
 * Purpose:	Reopen a file.  The new file handle which is returned points
 *		to the same file as the specified file handle.  Both handles
 *		share caches and other information.  The only difference
 *		between the handles is that the new handle is not mounted
 *		anywhere and no files are mounted on it.
 *
 * Return:	Success:	New file ID
 *
 *		Failure:	FAIL
 *
 * Programmer:	Robb Matzke
 *              Friday, October 16, 1998
 *
 * Modifications:
 *              Quincey Koziol, May 14, 2002
 *              Keep old file's read/write intent in reopened file.
 *
 *-------------------------------------------------------------------------
 */
hid_t
H5Freopen(hid_t file_id)
{
    H5F_t	*old_file=NULL;
    H5F_t	*new_file=NULL;
    hid_t	ret_value;
    
    FUNC_ENTER_API(H5Freopen, FAIL);
    H5TRACE1("i","i",file_id);

    if (NULL==(old_file=H5I_object_verify(file_id, H5I_FILE)))
	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file");

    /* Get a new "top level" file struct, sharing the same "low level" file struct */
    if (NULL==(new_file=H5F_new(old_file->shared, H5P_DEFAULT, H5P_DEFAULT)))
	HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "unable to reopen file");

    /* Keep old file's read/write intent in new file */
    new_file->intent=old_file->intent;

    if ((ret_value=H5I_register(H5I_FILE, new_file))<0)
	HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to atomize file handle");

done:
    if (ret_value<0 && new_file)
	H5F_close(new_file);
    FUNC_LEAVE(ret_value);
}


/*-------------------------------------------------------------------------
 * Function:	H5F_get_intent
 *
 * Purpose:	Quick and dirty routine to retrieve the file's 'intent' flags
 *          (Mainly added to stop non-file routines from poking about in the
 *          H5F_t data structure)
 *
 * Return:	'intent' on success/abort on failure (shouldn't fail)
 *
 * Programmer:	Quincey Koziol <koziol@ncsa.uiuc.edu>
 *		September 29, 2000
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
unsigned
H5F_get_intent(const H5F_t *f)
{
    /* Use FUNC_ENTER_NOINIT here to avoid performance issues */
    FUNC_ENTER_NOINIT(H5F_get_intent);

    assert(f);

    FUNC_LEAVE(f->intent);
}


/*-------------------------------------------------------------------------
 * Function:	H5F_sizeof_addr
 *
 * Purpose:	Quick and dirty routine to retrieve the size of the file's size_t
 *          (Mainly added to stop non-file routines from poking about in the
 *          H5F_t data structure)
 *
 * Return:	'sizeof_addr' on success/abort on failure (shouldn't fail)
 *
 * Programmer:	Quincey Koziol <koziol@ncsa.uiuc.edu>
 *		September 29, 2000
 *
 * Modifications:
 *
 *		Raymond Lu, Oct 14, 2001
 *		Changed to generic property list.
 *
 *-------------------------------------------------------------------------
 */
size_t
H5F_sizeof_addr(const H5F_t *f)
{
    size_t sizeof_addr = 0;
    H5P_genplist_t *plist;              /* Property list */
    size_t      ret_value;              /* Return value */

    FUNC_ENTER_NOAPI(H5F_sizeof_addr, 0);

    assert(f);
    assert(f->shared);

    /* Get property list */
    if(NULL == (plist = H5I_object(f->shared->fcpl_id)))
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, UFAIL, "not a property list");

    if(H5P_get(plist, H5F_CRT_ADDR_BYTE_NUM_NAME, &sizeof_addr)<0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, UFAIL, "can't get byte number for address");

    /* Set return value */
    ret_value=sizeof_addr;

done:
    FUNC_LEAVE(ret_value);
}


/*-------------------------------------------------------------------------
 * Function:	H5F_sizeof_size
 *
 * Purpose:	Quick and dirty routine to retrieve the size of the file's off_t
 *          (Mainly added to stop non-file routines from poking about in the
 *          H5F_t data structure)
 *
 * Return:	'sizeof_size' on success/abort on failure (shouldn't fail)
 *
 * Programmer:	Quincey Koziol <koziol@ncsa.uiuc.edu>
 *		September 29, 2000
 *
 * Modifications:
 *
 * 		Raymond Lu, Oct 14, 2001
 *		Changed to the new generic property list.
 *
 *-------------------------------------------------------------------------
 */
size_t
H5F_sizeof_size(const H5F_t *f)
{
    size_t   sizeof_size = 0;
    H5P_genplist_t *plist;              /* Property list */
    size_t      ret_value;              /* Return value */

    FUNC_ENTER_NOAPI(H5F_sizeof_size, 0);

    assert(f);
    assert(f->shared);

    /* Get property list */
    if(NULL == (plist = H5I_object(f->shared->fcpl_id)))
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, UFAIL, "not a property list");

    if(H5P_get(plist, H5F_CRT_OBJ_BYTE_NUM_NAME, &sizeof_size)<0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, UFAIL, "can't get byte number for object size");

    /* Set return value */
    ret_value=sizeof_size;

done:
    FUNC_LEAVE(ret_value);
}


/*-------------------------------------------------------------------------
 * Function:	H5F_get_driver_id
 *
 * Purpose:	Quick and dirty routine to retrieve the file's 'driver_id' value
 *          (Mainly added to stop non-file routines from poking about in the
 *          H5F_t data structure)
 *
 * Return:	'driver_id' on success/abort on failure (shouldn't fail)
 *
 * Programmer:	Quincey Koziol <koziol@ncsa.uiuc.edu>
 *		October 10, 2000
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
hid_t
H5F_get_driver_id(const H5F_t *f)
{
    /* Use FUNC_ENTER_NOINIT here to avoid performance issues */
    FUNC_ENTER_NOINIT(H5F_get_driver_id);

    assert(f);
    assert(f->shared);
    assert(f->shared->lf);

    FUNC_LEAVE(f->shared->lf->driver_id);
}


/*-------------------------------------------------------------------------
 * Function:	H5F_get_fileno
 *
 * Purpose:	Quick and dirty routine to retrieve the file's 'fileno' value
 *          (Mainly added to stop non-file routines from poking about in the
 *          H5F_t data structure)
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol <koziol@ncsa.uiuc.edu>
 *		March 27, 2002
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5F_get_fileno(const H5F_t *f, unsigned long *filenum)
{
    herr_t	ret_value = SUCCEED;

    FUNC_ENTER_NOAPI(H5F_get_fileno, FAIL);

    assert(f);
    assert(f->shared);
    assert(f->shared->lf);
    assert(filenum);

    /* Retrieve the file's serial number */
    if(H5FD_get_fileno(f->shared->lf,filenum)<0)
	HGOTO_ERROR(H5E_FILE, H5E_BADRANGE, FAIL, "can't retrieve fileno");

done:
    FUNC_LEAVE(ret_value);
} /* end H5F_get_fileno() */


/*-------------------------------------------------------------------------
 * Function:	H5F_block_read
 *
 * Purpose:	Reads some data from a file/server/etc into a buffer.
 *		The data is contiguous.	 The address is relative to the base
 *		address for the file.
 *
 * Errors:
 *		IO	  READERROR	Low-level read failed. 
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Robb Matzke
 *		matzke@llnl.gov
 *		Jul 10 1997
 *
 * Modifications:
 *		Albert Cheng, 1998-06-02
 *		Added XFER_MODE argument
 *
 * 		Robb Matzke, 1999-07-28
 *		The ADDR argument is passed by value.
 *
 * 		Robb Matzke, 1999-08-02
 *		Modified to use the virtual file layer. The data transfer
 *		property list is passed in by object ID since that's how the
 *		virtual file layer needs it.
 *-------------------------------------------------------------------------
 */
herr_t
H5F_block_read(H5F_t *f, H5FD_mem_t type, haddr_t addr, size_t size, hid_t dxpl_id,
	       void *buf/*out*/)
{
    haddr_t		    abs_addr;
    herr_t      ret_value=SUCCEED;       /* Return value */

    FUNC_ENTER_NOAPI(H5F_block_read, FAIL);

    assert (f);
    assert (f->shared);
    assert(size<SIZET_MAX);
    assert (buf);

    /* convert the relative address to an absolute address */
    abs_addr = f->shared->base_addr + addr;

    /* Read the data */
    if (H5FD_read(f->shared->lf, type, dxpl_id, abs_addr, size, buf)<0)
	HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "file read failed");

done:
    FUNC_LEAVE(ret_value);
}


/*-------------------------------------------------------------------------
 * Function:	H5F_block_write
 *
 * Purpose:	Writes some data from memory to a file/server/etc.  The
 *		data is contiguous.  The address is relative to the base
 *		address.
 *
 * Errors:
 *		IO	  WRITEERROR	Low-level write failed. 
 *		IO	  WRITEERROR	No write intent. 
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Robb Matzke
 *		matzke@llnl.gov
 *		Jul 10 1997
 *
 * Modifications:
 *		Albert Cheng, 1998-06-02
 *		Added XFER_MODE argument
 *
 * 		Robb Matzke, 1999-07-28
 *		The ADDR argument is passed by value.
 *
 * 		Robb Matzke, 1999-08-02
 *		Modified to use the virtual file layer. The data transfer
 *		property list is passed in by object ID since that's how the
 *		virtual file layer needs it.
 *-------------------------------------------------------------------------
 */
herr_t
H5F_block_write(H5F_t *f, H5FD_mem_t type, haddr_t addr, size_t size,
        hid_t dxpl_id, const void *buf)
{
    haddr_t		    abs_addr;
    herr_t      ret_value=SUCCEED;       /* Return value */

    FUNC_ENTER_NOAPI(H5F_block_write, FAIL);

    assert (f);
    assert (f->shared);
    assert (size<SIZET_MAX);
    assert (buf);

    if (0==(f->intent & H5F_ACC_RDWR))
	HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "no write intent");

    /* Convert the relative address to an absolute address */
    abs_addr = f->shared->base_addr + addr;

    /* Write the data */
    if (H5FD_write(f->shared->lf, type, dxpl_id, abs_addr, size, buf))
	HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "file write failed");

done:
    FUNC_LEAVE(ret_value);
}


/*-------------------------------------------------------------------------
 * Function:	H5F_addr_encode
 *
 * Purpose:	Encodes an address into the buffer pointed to by *PP and
 *		then increments the pointer to the first byte after the
 *		address.  An undefined value is stored as all 1's.
 *
 * Return:	void
 *
 * Programmer:	Robb Matzke
 *		Friday, November  7, 1997
 *
 * Modifications:
 *		Robb Matzke, 1999-07-28
 *		The ADDR argument is passed by value.
 *-------------------------------------------------------------------------
 */
void
H5F_addr_encode(H5F_t *f, uint8_t **pp/*in,out*/, haddr_t addr)
{
    unsigned		    i;
    haddr_t		    tmp;

    assert(f);
    assert(pp && *pp);

    if (H5F_addr_defined(addr)) {
	tmp = addr;
	for (i=0; i<H5F_SIZEOF_ADDR(f); i++) {
	    *(*pp)++ = (uint8_t)(tmp & 0xff);
	    tmp >>= 8;
	}
	assert("overflow" && 0 == tmp);

    } else {
	for (i=0; i<H5F_SIZEOF_ADDR(f); i++)
	    *(*pp)++ = 0xff;
    }
}


/*-------------------------------------------------------------------------
 * Function:	H5F_addr_decode
 *
 * Purpose:	Decodes an address from the buffer pointed to by *PP and
 *		updates the pointer to point to the next byte after the
 *		address.
 *
 *		If the value read is all 1's then the address is returned
 *		with an undefined value.
 *
 * Return:	void
 *
 * Programmer:	Robb Matzke
 *		Friday, November  7, 1997
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
void
H5F_addr_decode(H5F_t *f, const uint8_t **pp/*in,out*/, haddr_t *addr_p/*out*/)
{
    unsigned		    i;
    haddr_t		    tmp;
    uint8_t		    c;
    hbool_t		    all_zero = TRUE;

    assert(f);
    assert(pp && *pp);
    assert(addr_p);

    *addr_p = 0;

    for (i=0; i<H5F_SIZEOF_ADDR(f); i++) {
	c = *(*pp)++;
	if (c != 0xff)
            all_zero = FALSE;

	if (i<sizeof(*addr_p)) {
	    tmp = c;
	    tmp <<= i * 8;	/*use tmp to get casting right */
	    *addr_p |= tmp;
	} else if (!all_zero) {
	    assert(0 == **pp);	/*overflow */
	}
    }
    if (all_zero)
        *addr_p = HADDR_UNDEF;
}


/*-------------------------------------------------------------------------
 * Function:	H5F_addr_pack
 *
 * Purpose:	Converts a long[2] array (usually returned from
 *		H5G_get_objinfo) back into a haddr_t
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *		Tuesday, October  23, 1998
 *
 * Modifications:
 *		Albert Cheng, 1999-02-18
 *		Changed objno to unsigned long type to be consistent with
 *      	addr->offset and how it is being called.
 *-------------------------------------------------------------------------
 */
herr_t
H5F_addr_pack(H5F_t UNUSED *f, haddr_t *addr_p/*out*/,
	      const unsigned long objno[2])
{
    /* Use FUNC_ENTER_NOINIT here to avoid performance issues */
    FUNC_ENTER_NOINIT(H5F_addr_pack);

    assert(f);
    assert(objno);
    assert(addr_p);

    *addr_p = objno[0];
#if H5_SIZEOF_LONG<H5_SIZEOF_UINT64_T
    *addr_p |= ((uint64_t)objno[1]) << (8*sizeof(long));
#endif
    
    FUNC_LEAVE(SUCCEED);
}


/*-------------------------------------------------------------------------
 * Function:	H5F_debug
 *
 * Purpose:	Prints a file header to the specified stream.  Each line
 *		is indented and the field name occupies the specified width
 *		number of characters.
 *
 * Errors:
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Robb Matzke
 *		matzke@llnl.gov
 *		Aug  1 1997
 *
 * Modifications:
 *		Robb Matzke, 1999-07-28
 *		The ADDR argument is passed by value.
 * 		
 *		Raymond Lu, 2001-10-14
 * 		Changed to the new generic property list.
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5F_debug(H5F_t *f, haddr_t UNUSED addr, FILE * stream, int indent,
	  int fwidth)
{
    hsize_t userblock_size;
    int     btree_k[H5B_NUM_BTREE_ID];
    unsigned sym_leaf_k;
    size_t  sizeof_addr, sizeof_size;
    int     boot_vers, freespace_vers, obj_dir_vers, share_head_vers;
    H5P_genplist_t *plist;              /* Property list */
    herr_t      ret_value=SUCCEED;       /* Return value */

    FUNC_ENTER_NOAPI(H5F_debug, FAIL);

    /* check args */
    assert(f);
    assert(H5F_addr_defined(addr));
    assert(stream);
    assert(indent >= 0);
    assert(fwidth >= 0);

    /* Get property list */
    if(NULL == (plist = H5I_object(f->shared->fcpl_id)))
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a property list");

    if(H5P_get(plist, H5F_CRT_USER_BLOCK_NAME, &userblock_size)<0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get user block size");
    if(H5P_get(plist, H5F_CRT_SYM_LEAF_NAME, &sym_leaf_k)<0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get rank for symbol table leaf nodes");
    if(H5P_get(plist, H5F_CRT_BTREE_RANK_NAME, btree_k)<0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get rank for btree nodes");

    if(H5P_get(plist, H5F_CRT_ADDR_BYTE_NUM_NAME, &sizeof_addr)<0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get byte number for an address");
    if(H5P_get(plist, H5F_CRT_OBJ_BYTE_NUM_NAME, &sizeof_size)<0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get byte number for object size");

    if(H5P_get(plist, H5F_CRT_BOOT_VERS_NAME, &boot_vers)<0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get boot block version");
    if(H5P_get(plist, H5F_CRT_FREESPACE_VERS_NAME, &freespace_vers)<0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get boot block version");
    if(H5P_get(plist, H5F_CRT_OBJ_DIR_VERS_NAME, &obj_dir_vers)<0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get object directory version");
    if(H5P_get(plist, H5F_CRT_SHARE_HEAD_VERS_NAME, &share_head_vers)<0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get shared-header format version");

    /* debug */
    HDfprintf(stream, "%*sFile Boot Block...\n", indent, "");

    HDfprintf(stream, "%*s%-*s %s\n", indent, "", fwidth,
	      "File name:",
	      f->name);
    HDfprintf(stream, "%*s%-*s 0x%08x\n", indent, "", fwidth,
	      "Flags",
	      (unsigned) (f->shared->flags));
    HDfprintf(stream, "%*s%-*s %u\n", indent, "", fwidth,
	      "Reference count:",
	      (unsigned) (f->shared->nrefs));
    HDfprintf(stream, "%*s%-*s 0x%08lx\n", indent, "", fwidth,
	      "Consistency flags:",
	      (unsigned long) (f->shared->consist_flags));
    HDfprintf(stream, "%*s%-*s %a (abs)\n", indent, "", fwidth,
	      "Address of boot block:", f->shared->boot_addr);
    HDfprintf(stream, "%*s%-*s %a (abs)\n", indent, "", fwidth,
	      "Base address:", f->shared->base_addr);
    HDfprintf(stream, "%*s%-*s %a (rel)\n", indent, "", fwidth,
	      "Free list address:", f->shared->freespace_addr);
    HDfprintf(stream, "%*s%-*s %a (rel)\n", indent, "", fwidth,
	      "Driver information block:", f->shared->driver_addr);

    HDfprintf(stream, "%*s%-*s %lu bytes\n", indent, "", fwidth,
	      "Size of user block:", (unsigned long) userblock_size);
    HDfprintf(stream, "%*s%-*s %u bytes\n", indent, "", fwidth,
	      "Size of file size_t type:", (unsigned) sizeof_size);
    HDfprintf(stream, "%*s%-*s %u bytes\n", indent, "", fwidth,
	      "Size of file haddr_t type:", (unsigned) sizeof_addr);
    HDfprintf(stream, "%*s%-*s %u\n", indent, "", fwidth,
	      "Symbol table leaf node 1/2 rank:", sym_leaf_k);
    HDfprintf(stream, "%*s%-*s %u\n", indent, "", fwidth,
	      "Symbol table internal node 1/2 rank:",
              (unsigned) (btree_k[H5B_SNODE_ID]));
    HDfprintf(stream, "%*s%-*s %u\n", indent, "", fwidth,
	      "Boot block version number:", (unsigned) boot_vers);
    HDfprintf(stream, "%*s%-*s %u\n", indent, "", fwidth,
	      "Free list version number:", (unsigned) freespace_vers);
    HDfprintf(stream, "%*s%-*s %u\n", indent, "", fwidth,
	      "Object directory version number:", (unsigned) obj_dir_vers);
    HDfprintf(stream, "%*s%-*s %u\n", indent, "", fwidth,
	      "Shared header version number:", (unsigned) share_head_vers);

    HDfprintf(stream, "%*s%-*s %s\n", indent, "", fwidth,
	      "Root group symbol table entry:",
	      f->shared->root_grp ? "" : "(none)");
    if (f->shared->root_grp) {
	H5G_ent_debug(f, H5G_entof(f->shared->root_grp), stream,
		      indent+3, MAX(0, fwidth-3), HADDR_UNDEF);
    }

done:
    FUNC_LEAVE(ret_value);
}