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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
H5D.c
HDF5 Dataset routines
EXPORTED ROUTINES
H5Dcreate -- Create a dataset
H5Drelease -- Release access to a dataset
LIBRARY-SCOPED ROUTINES
LOCAL ROUTINES
H5P_init_interface -- initialize the interface
+ */
#include "hdf5.h"
#include "H5private.h" /* Generic Functions */
#include "H5Dprivate.h" /* Dataset functions */
#define PABLO_MASK H5D_mask
/*--------------------- Locally scoped variables -----------------------------*/
/* Whether we've installed the library termination function yet for this interface */
static intn interface_initialize_g = FALSE;
/*--------------------------------------------------------------------------
NAME
H5D_init_interface -- Initialize interface-specific information
USAGE
herr_t H5D_init_interface()
RETURNS
SUCCEED/FAIL
DESCRIPTION
Initializes any interface-specific data or routines.
--------------------------------------------------------------------------*/
static herr_t H5D_init_interface(void)
{
herr_t ret_value = SUCCEED;
FUNC_ENTER (H5D_init_interface, NULL, FAIL);
/* Initialize the atom group for the file IDs */
ret_value=H5Ainit_group(H5_DATASET,HDF5_DATASETID_HASHSIZE,H5D_RESERVED_ATOMS);
FUNC_LEAVE(ret_value);
} /* H5D_init_interface */
/*--------------------------------------------------------------------------
NAME
H5D_create
PURPOSE
Create a new HDF5 dataset object
USAGE
hatom_t H5D_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 dataset object.
--------------------------------------------------------------------------*/
hatom_t H5D_create(hatom_t owner_id, hobjtype_t type, const char *name)
{
H5D_dataset_t *new_dset; /* new dataset object to create */
hatom_t ret_value = SUCCEED;
FUNC_ENTER(H5D_create, H5D_init_interface, FAIL);
/* Clear errors and check args and all the boring stuff. */
H5ECLEAR;
/* Allocate space for the new data-type */
if((new_dset=HDmalloc(sizeof(H5D_dataset_t)))==NULL)
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL);
/* Initialize the dimensionality object */
/* new_dset->file=? */
new_dset->parent=owner_id; /* set the owner's ID */
new_dset->name=HDstrdup(name); /* make a copy of the dataset name */
new_dset->modified=BTRUE; /* Yep, we're new... */
new_dset->type=0;
new_dset->dim=0;
new_dset->header=(-1); /* don't know where we are... */
new_dset->data=(-1); /* don't know where we should put the data, either... */
/* Register the new datatype and get an ID for it */
if((ret_value=H5Aregister_atom(H5_DATASET, (const VOIDP)new_dset))==FAIL)
HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL);
done:
if(ret_value == FAIL)
{ /* Error condition cleanup */
} /* end if */
/* Normal function cleanup */
FUNC_LEAVE(ret_value);
} /* end H5D_create() */
/*--------------------------------------------------------------------------
NAME
H5Dset_info
PURPOSE
Set the type and dimensionality of a dataset.
USAGE
herr_t H5Dset_info(oid)
hatom_t oid; IN: Dataset object to modify
hatom_t tid; IN: Datatype object to use as node element
hatom_t did; IN: Dimensionality object to use as dataspace
RETURNS
SUCCEED/FAIL
DESCRIPTION
This function sets the datatype and dataspace of a dataset.
--------------------------------------------------------------------------*/
herr_t H5Dset_info(hatom_t oid, hatom_t tid, hatom_t did)
{
H5D_dataset_t *dataset; /* dataset object to release */
herr_t ret_value = SUCCEED;
FUNC_ENTER(H5Dset_info, H5D_init_interface, FAIL);
/* Clear errors and check args and all the boring stuff. */
H5ECLEAR;
/* Check that we've received correctly typed parameters */
if(H5Aatom_group(tid)!=H5_DATATYPE || H5Aatom_group(did)!=H5_DATASPACE)
HGOTO_ERROR(H5E_ATOM, H5E_BADTYPE, FAIL);
/* Get the object */
if((dataset=H5Aatom_object(oid))==NULL)
HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL);
/* Check that the datatype & dataspace haven't already been initialized */
if(dataset->type!=0 || dataset->dim!=0)
HGOTO_ERROR(H5E_FUNC, H5E_ALREADYINIT, FAIL);
dataset->type=tid;
dataset->dim=did;
dataset->modified=BTRUE; /* indicate the values have changed */
done:
if(ret_value == FAIL)
{ /* Error condition cleanup */
} /* end if */
/* Normal function cleanup */
FUNC_LEAVE(ret_value);
} /* end H5Dset_info() */
/*--------------------------------------------------------------------------
NAME
H5Dwrite
PURPOSE
Write data for a dataset
USAGE
herr_t H5Dset_info(oid)
hatom_t oid; IN: Dataset object to modify
hatom_t did; IN: Dimensionality object to use as dataspace for I/O
VOIDP buf; IN: Buffer with data to write to the file
RETURNS
SUCCEED/FAIL
DESCRIPTION
This function writes dataset object data to the file. The dataspace
ID determines the slice/hyper-slab/portion of the dataset to write.
H5P_SCALAR is a special value which indicates that the entire dataset is
to be written out. (For datasets which have a scalar dataspace for the
entire dataset, this is somewhat redundant.... :-)
--------------------------------------------------------------------------*/
herr_t H5Dwrite(hatom_t oid, hatom_t did, VOIDP buf)
{
H5D_dataset_t *dataset; /* dataset object to release */
uintn towrite; /* number of bytes to write out */
herr_t ret_value = SUCCEED;
FUNC_ENTER(H5Dwrite, H5D_init_interface, FAIL);
/* Clear errors and check args and all the boring stuff. */
H5ECLEAR;
/* Check that we've received correctly typed parameters */
if(H5Aatom_group(did)!=H5_DATASPACE)
HGOTO_ERROR(H5E_ATOM, H5E_BADTYPE, FAIL);
if(buf==NULL)
HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL);
/* Get the object */
if((dataset=H5Aatom_object(oid))==NULL)
HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL);
/* Check that the datatype & dataspace haven't already been initialized */
if(dataset->type==0 || dataset->dim==0)
HGOTO_ERROR(H5E_FUNC, H5E_UNINITIALIZED, FAIL);
/* towrite=H5Tsize(dataset->type)*H5Pnelem(did); */
/* Check memory to disk datatype conversions, etc. */
/* data out */
done:
if(ret_value == FAIL)
{ /* Error condition cleanup */
} /* end if */
/* Normal function cleanup */
FUNC_LEAVE(ret_value);
} /* end H5Dset_info() */
/*--------------------------------------------------------------------------
NAME
H5D_release
PURPOSE
Release access to an HDF5 dataset object.
USAGE
herr_t H5D_release(oid)
hatom_t oid; IN: Object to release access to
RETURNS
SUCCEED/FAIL
DESCRIPTION
This function releases a dataset from active use by a user.
--------------------------------------------------------------------------*/
herr_t H5D_release(hatom_t oid)
{
H5D_dataset_t *dataset; /* dataset object to release */
herr_t ret_value = SUCCEED;
FUNC_ENTER(H5D_release, H5D_init_interface, FAIL);
/* Clear errors and check args and all the boring stuff. */
H5ECLEAR;
/* Chuck the object! :-) */
if((dataset=H5Aremove_atom(oid))==NULL)
HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL);
/* Check if we have information to flush to the file... */
if(dataset->modified==BTRUE)
{
/* Flush object header, etc. to the file... */
} /* end if */
if(dataset->name!=NULL)
HDfree(dataset->name);
HDfree(dataset);
done:
if(ret_value == FAIL)
{ /* Error condition cleanup */
} /* end if */
/* Normal function cleanup */
FUNC_LEAVE(ret_value);
} /* end H5D_release() */
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