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/****************************************************************************
* 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. *
* *
****************************************************************************/
#ifdef RCSID
static char RcsId[] = "@(#)$Revision$";
#endif
/* $Id$ */
/*LINTLIBRARY */
/*+
FILE
H5P.c
HDF5 Data-space routines
EXPORTED ROUTINES
H5Pcreate -- Create a data-space
H5Prelease -- Release access to a data-space
LIBRARY-SCOPED ROUTINES
LOCAL ROUTINES
H5P_init_interface -- initialize the interface
+ */
#include "hdf5.h"
#include "H5private.h" /* Generic Functions */
#include "H5Pprivate.h" /* Data-space functions */
/*--------------------- Locally scoped variables -----------------------------*/
/* Whether we've installed the library termination function yet for this interface */
static intn interface_initialize = FALSE;
/*--------------------------------------------------------------------------
NAME
H5P_init_interface -- Initialize interface-specific information
USAGE
herr_t H5P_init_interface()
RETURNS
SUCCEED/FAIL
DESCRIPTION
Initializes any interface-specific data or routines.
--------------------------------------------------------------------------*/
static herr_t H5P_init_interface(void)
{
#ifdef LATER
CONSTR(FUNC, "H5P_init_interface"); /* For HERROR */
#endif /* LATER */
herr_t ret_value = SUCCEED;
/* Don't use "FUNC_ENTER" macro, to avoid potential infinite recursion */
PABLO_TRACE_ON(H5P_mask, ID_H5P_init_interface);
/* Don't call this routine again... */
interface_initialize = TRUE;
/* Initialize the atom group for the file IDs */
ret_value=H5Ainit_group(H5_DATASPACE,HDF5_DATASPACEID_HASHSIZE,H5P_RESERVED_ATOMS);
FUNC_LEAVE(H5P_mask, ID_H5P_init_interface, ret_value);
} /* H5P_init_interface */
/*--------------------------------------------------------------------------
NAME
H5P_create
PURPOSE
Create a new HDF5 dimensionality object
USAGE
hatom_t H5P_create(owner_id, type, name)
hatom_t owner_id; IN: Group/file which owns this object
hobjtype_t type; IN: Type of object to create
const char *name; IN: Name of the object
RETURNS
Returns ID (atom) on success, FAIL on failure
DESCRIPTION
This function actually creates the dimensionality object.
--------------------------------------------------------------------------*/
hatom_t H5P_create(hatom_t owner_id, hobjtype_t type, const char *name)
{
CONSTR(FUNC, "H5P_create"); /* for HERROR */
H5P_dim_t *new_dim; /* new dimensionality object to create */
hatom_t ret_value = SUCCEED;
FUNC_ENTER(H5P_mask, ID_H5P_create, H5P_init_interface, FAIL);
/* Clear errors and check args and all the boring stuff. */
H5ECLEAR;
/* Allocate space for the new data-type */
if((new_dim=HDmalloc(sizeof(H5P_dim_t)))==NULL)
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL);
/* Initialize the dimensionality object */
new_dim->rank=0;
new_dim->dims=NULL;
/* Register the new datatype and get an ID for it */
if((ret_value=H5Aregister_atom(H5_DATASPACE, (const VOIDP)new_dim))==FAIL)
HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL);
done:
if(ret_value == FAIL)
{ /* Error condition cleanup */
} /* end if */
/* Normal function cleanup */
FUNC_LEAVE(H5P_mask, ID_H5P_create, ret_value);
} /* end H5P_create() */
/*--------------------------------------------------------------------------
NAME
H5Pnelem
PURPOSE
Return the number of elements in a dataspace
USAGE
uintn H5Pnelem(sid)
hatom_t sid; IN: Dataspace object to query
RETURNS
The number of elements in a dataspace on success, UFAIL on failure
DESCRIPTION
This function determines the number of dataset elements in a
dataspace. For example, a simple 3-dimensional dataspace with dimensions
2, 3 and 4 would have 24 elements.
UFAIL is returned on an error, otherwise the number of elements is returned.
--------------------------------------------------------------------------*/
uintn H5Pnelem(hatom_t sid)
{
CONSTR(FUNC, "H5Pnelem"); /* for HERROR */
uintn ret_value = UFAIL;
FUNC_ENTER(H5P_mask, ID_H5Pnelem, H5P_init_interface, UFAIL);
/* Clear errors and check args and all the boring stuff. */
H5ECLEAR;
#ifdef FINISH_THIS
#else /* FINISH_THIS */
if(sid==H5P_SCALAR)
ret_value=1;
#endif /* FINISH_THIS */
done:
if(ret_value == UFAIL)
{ /* Error condition cleanup */
} /* end if */
/* Normal function cleanup */
FUNC_LEAVE(H5P_mask, ID_H5Pnelem, ret_value);
} /* end H5Pnelem() */
/*--------------------------------------------------------------------------
NAME
H5P_release
PURPOSE
Release access to an HDF5 dimensionality object.
USAGE
herr_t H5P_release(oid)
hatom_t oid; IN: Object to release access to
RETURNS
SUCCEED/FAIL
DESCRIPTION
This function releases a dimensionality from active use by a user.
--------------------------------------------------------------------------*/
herr_t H5P_release(hatom_t oid)
{
CONSTR(FUNC, "H5P_release"); /* for HERROR */
H5P_dim_t *dim; /* dimensionality object to release */
herr_t ret_value = SUCCEED;
FUNC_ENTER(H5P_mask, ID_H5Prelease, H5P_init_interface, FAIL);
/* Clear errors and check args and all the boring stuff. */
H5ECLEAR;
/* Chuck the object! :-) */
if((dim=H5Aremove_atom(oid))==NULL)
HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL);
if(dim->rank>0)
HDfree(dim->dims);
HDfree(dim);
done:
if(ret_value == FAIL)
{ /* Error condition cleanup */
} /* end if */
/* Normal function cleanup */
FUNC_LEAVE(H5P_mask, ID_H5P_release, ret_value);
} /* end H5P_release() */
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