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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by The HDF Group. *
* Copyright by the Board of Trustees of the University of Illinois. *
* All rights reserved. *
* *
* This file is part of HDF5. The full HDF5 copyright notice, including *
* terms governing use, modification, and redistribution, is contained in *
* the files COPYING and Copyright.html. COPYING can be found at the root *
* of the source code distribution tree; Copyright.html can be found at the *
* root level of an installed copy of the electronic HDF5 document set and *
* is linked from the top-level documents page. It can also be found at *
* http://hdfgroup.org/HDF5/doc/Copyright.html. If you do not have *
* access to either file, you may request a copy from help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <stdio.h>
/* High-level library internal header file */
#include "H5HLprivate2.h"
/* public LT prototypes */
#include "H5DOpublic.h"
/*-------------------------------------------------------------------------
* Function: H5DOwrite_chunk
*
* Purpose: Writes an entire chunk to the file directly.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Raymond Lu
* 30 July 2012
*
*-------------------------------------------------------------------------
*/
herr_t
H5DOwrite_chunk(hid_t dset_id, hid_t dxpl_id, uint32_t filters, const hsize_t *offset,
size_t data_size, const void *buf)
{
hbool_t created_dxpl = FALSE; /* Whether we created a DXPL */
hbool_t do_direct_write = TRUE; /* Flag for direct writes */
hbool_t tt=FALSE; /* Flag for direct writes */
uint32_t data_size_32; /* Chunk data size (limited to 32-bits currently) */
herr_t ret_value = FAIL; /* Return value */
/* Check arguments */
if(dset_id < 0)
goto done;
if(!buf)
goto done;
if(!offset)
goto done;
if(!data_size)
goto done;
data_size_32 = (uint32_t)data_size;
if(data_size != (size_t)data_size_32)
goto done;
/* If the user passed in a default DXPL, create one to pass to H5Dwrite() */
if(H5P_DEFAULT == dxpl_id) {
if((dxpl_id = H5Pcreate(H5P_DATASET_XFER)) < 0)
goto done;
created_dxpl = TRUE;
} /* end if */
/* Set direct write parameters */
if(H5Pset(dxpl_id, H5D_XFER_DIRECT_CHUNK_WRITE_FLAG_NAME, &do_direct_write) < 0)
goto done;
if(H5Pset(dxpl_id, H5D_XFER_DIRECT_CHUNK_WRITE_FILTERS_NAME, &filters) < 0)
goto done;
if(H5Pset(dxpl_id, H5D_XFER_DIRECT_CHUNK_WRITE_OFFSET_NAME, &offset) < 0)
goto done;
if(H5Pset(dxpl_id, H5D_XFER_DIRECT_CHUNK_WRITE_DATASIZE_NAME, &data_size_32) < 0)
goto done;
/* Write chunk */
if(H5Dwrite(dset_id, 0, H5S_ALL, H5S_ALL, dxpl_id, buf) < 0)
goto done;
/* Indicate success */
ret_value = SUCCEED;
done:
if(created_dxpl) {
if(H5Pclose(dxpl_id) < 0)
ret_value = FAIL;
} /* end if */
else {
/* Reset the direct write flag on user DXPL */
do_direct_write = FALSE;
if(H5Pset(dxpl_id, H5D_XFER_DIRECT_CHUNK_WRITE_FLAG_NAME, &do_direct_write) < 0)
ret_value = FAIL;
}
return(ret_value);
} /* end H5DOwrite_chunk() */
/*-------------------------------------------------------------------------
* Function: H5DOread_chunk
*
* Purpose: Reads an entire chunk from the file directly.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Matthew Strong (GE Healthcare)
* 14 February 2016
*
*------------ -------------------------------------------------------------
*/
herr_t
H5DOread_chunk(hid_t dset_id, hid_t dxpl_id, const hsize_t *offset, uint32_t *filters,
void *buf)
{
hbool_t created_dxpl = FALSE; /* Whether we created a DXPL */
hbool_t do_direct_read = TRUE; /* Flag for direct writes */
herr_t ret_value = FAIL; /* Return value */
/* Check arguments */
if(dset_id < 0)
goto done;
if(!buf)
goto done;
if(!offset)
goto done;
if(!filters)
goto done;
/* If the user passed in a default DXPL, create one to pass to H5Dwrite() */
if(H5P_DEFAULT == dxpl_id) {
if((dxpl_id = H5Pcreate(H5P_DATASET_XFER)) < 0)
goto done;
created_dxpl = TRUE;
} /* end if */
/* Set direct write parameters */
if(H5Pset(dxpl_id, H5D_XFER_DIRECT_CHUNK_READ_FLAG_NAME, &do_direct_read) < 0)
goto done;
if(H5Pset(dxpl_id, H5D_XFER_DIRECT_CHUNK_READ_OFFSET_NAME, &offset) < 0)
goto done;
/* Read chunk */
if(H5Dread(dset_id, 0, H5S_ALL, H5S_ALL, dxpl_id, buf) < 0)
goto done;
/* Get the filter mask */
if(H5Pget(dxpl_id, H5D_XFER_DIRECT_CHUNK_READ_FILTERS_NAME, filters) < 0)
goto done;
/* Indicate success */
ret_value = SUCCEED;
done:
if(created_dxpl) {
if(H5Pclose(dxpl_id) < 0)
ret_value = FAIL;
} /* end if */
else {
/* Reset the direct read flag on user DXPL */
do_direct_read = FALSE;
if(H5Pset(dxpl_id, H5D_XFER_DIRECT_CHUNK_READ_FLAG_NAME, &do_direct_read) < 0)
ret_value = FAIL;
}
return(ret_value);
} /* end H5DOread_chunk() */
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