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/****************************************************************************
* NCSA HDF *
* Scientific Data Technologies *
* 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. *
* *
****************************************************************************/
#include "H5HL_private.h"
/*-------------------------------------------------------------------------
*
* Functions shared between H5TB and H5PT
*
*-------------------------------------------------------------------------
*/
/*-------------------------------------------------------------------------
* Function: H5TBcommon_append_records
*
* Purpose: Common code for reading records shared between H5PT and H5TB
*
* Return: Success: 0, Failure: -1
*
* Programmer: Nat Furrer, nfurrer@ncsa.uiuc.edu
* James Laird, jlaird@ncsa.uiuc.edu
*
* Date: March 8, 2004
*
* Comments: Called by H5TBappend_records and H5PTappend_records
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
herr_t H5TBcommon_append_records( hid_t dataset_id,
hid_t mem_type_id,
hsize_t nrecords,
hsize_t orig_table_size,
const void * data)
{
hsize_t count[1];
hsize_t offset[1];
hid_t space_id = H5I_BADID;
hid_t mem_space_id = H5I_BADID;
hsize_t dims[1];
hsize_t mem_dims[1];
/* Extend the dataset */
dims[0] = nrecords + orig_table_size;
if ( H5Dextend ( dataset_id, dims ) < 0 )
goto out;
/* Create a simple memory data space */
mem_dims[0]=nrecords;
if ( (mem_space_id = H5Screate_simple( 1, mem_dims, NULL )) < 0 )
goto out;
/* Get a copy of the new file data space for writing */
if ( (space_id = H5Dget_space( dataset_id )) < 0 )
goto out;
/* Define a hyperslab in the dataset */
offset[0] = orig_table_size;
count[0] = nrecords;
if ( H5Sselect_hyperslab( space_id, H5S_SELECT_SET, offset, NULL, count, NULL) < 0 )
goto out;
/* Write the records */
if ( H5Dwrite( dataset_id, mem_type_id, mem_space_id, space_id, H5P_DEFAULT, data ) <
0 )
goto out;
/* Terminate access to the dataspace */
if ( H5Sclose( mem_space_id ) < 0 )
goto out;
if ( H5Sclose( space_id ) < 0 )
goto out;
return 0;
out:
H5E_BEGIN_TRY
H5Sclose(mem_space_id);
H5Sclose(space_id);
H5E_END_TRY
return -1;
}
/*-------------------------------------------------------------------------
* Function: H5TBcommon_read_records
*
* Purpose: Common code for reading records shared between H5PT and H5TB
*
* Return: Success: 0, Failure: -1
*
* Programmer: Nat Furrer, nfurrer@ncsa.uiuc.edu
* James Laird, jlaird@ncsa.uiuc.edu
*
* Date: March 8, 2004
*
* Comments: Called by H5TBread_records and H5PTread_records
*
* Modifications:
*
*
*-------------------------------------------------------------------------
*/
herr_t H5TBcommon_read_records( hid_t dataset_id,
hid_t mem_type_id,
hsize_t start,
hsize_t nrecords,
hsize_t table_size,
void *data)
{
hsize_t count[1];
hsize_t offset[1];
hid_t space_id = H5I_BADID;
hid_t mem_space_id = H5I_BADID;
hsize_t mem_size[1];
/* Make sure the read request is in bounds */
if ( start + nrecords > table_size )
goto out;
/* Get the dataspace handle */
if ( (space_id = H5Dget_space( dataset_id )) < 0 )
goto out;
/* Define a hyperslab in the dataset of the size of the records */
offset[0] = start;
count[0] = nrecords;
if ( H5Sselect_hyperslab( space_id, H5S_SELECT_SET, offset, NULL, count, NULL) < 0 )
goto out;
/* Create a memory dataspace handle */
mem_size[0] = count[0];
if ((mem_space_id = H5Screate_simple( 1, mem_size, NULL )) < 0 )
goto out;
if ((H5Dread( dataset_id, mem_type_id, mem_space_id, space_id, H5P_DEFAULT, data)) < 0
)
goto out;
/* Terminate access to the memory dataspace */
if ( H5Sclose( mem_space_id ) < 0 )
goto out;
/* Terminate access to the dataspace */
if ( H5Sclose( space_id ) < 0 )
goto out;
return 0;
out:
H5E_BEGIN_TRY
H5Sclose(space_id);
H5Sclose(mem_space_id);
H5E_END_TRY
return -1;
}
|
