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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 COPYING file, which can be found at the root of the source code *
* distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases. *
* If you do not have access to either file, you may request a copy from *
* help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*
* Programmer: Pedro Vicente <pvn@hdfgroup.edu>
* April 7, 2008
*
* Purpose: Tests the H5Dget_chunk_info API function
* This program writes a 4x4 dataset by iterating on 2x2 chunks
* at a time
*/
#include "h5test.h"
#define PRINT_DATA
#define H5FILE_NAME "chunk_info.h5"
#define DATASETNAME "2d"
#define RANK 2
int main( void )
{
hid_t fid; /* file ID */
hid_t did; /* dataset ID */
hid_t f_sid; /* file space ID */
hid_t m_sid; /* memory space ID */
hid_t pid; /* property list ID */
hsize_t start[2]; /* chunk location to start writing */
hsize_t dims[2] = { 4, 4};
hsize_t chunk_dims[2] = { 2, 2 };
int chunk_data[2][2] = { {1, 1}, {1, 1} };
int buf[4][4];
int fillvalue = 0;
int i, j, ii, jj;
/* create a new file using default properties. */
if ((fid = H5Fcreate(H5FILE_NAME, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR;
/* create the file space */
if ((f_sid = H5Screate_simple(RANK, dims, dims)) < 0) TEST_ERROR;
/* create the memory space with chunk dimensions */
if ((m_sid = H5Screate_simple(RANK, chunk_dims, chunk_dims)) < 0) TEST_ERROR;
start[0] = 0;
start[1] = 0;
if (H5Sselect_hyperslab(m_sid, H5S_SELECT_SET, start, NULL, chunk_dims, NULL) < 0) TEST_ERROR;
TESTING("chunk info");
/*-------------------------------------------------------------------------
* create a dataset
*-------------------------------------------------------------------------
*/
/* modify dataset creation properties, i.e. enable chunking. */
if ((pid = H5Pcreate (H5P_DATASET_CREATE)) < 0) TEST_ERROR;
if (H5Pset_chunk(pid, RANK, chunk_dims) < 0) TEST_ERROR;
if (H5Pset_fill_value(pid, H5T_NATIVE_INT, &fillvalue) < 0) TEST_ERROR;
/* create a new dataset */
if((did = H5Dcreate2(fid , DATASETNAME, H5T_NATIVE_INT, f_sid, H5P_DEFAULT, pid, H5P_DEFAULT)) < 0) TEST_ERROR;
/*-------------------------------------------------------------------------
* write the dataset in 2x2 chunks
*-------------------------------------------------------------------------
*/
/* iterate in dim 0 */
for (j = 0; j < chunk_dims[0]; j++)
{
/* reset start in dim 1 */
start[1] = 0;
/* iterate in dim 1 */
for (i = 0; i < chunk_dims[1]; i++)
{
/* select file hyperslab to save a 2x2 chunk */
if (H5Sselect_hyperslab(f_sid, H5S_SELECT_SET, start, NULL, chunk_dims, NULL) < 0) TEST_ERROR;
/* write the data to the hyperslab. */
if (H5Dwrite(did, H5T_NATIVE_INT, m_sid, f_sid, H5P_DEFAULT, chunk_data) < 0) TEST_ERROR;
/* read back and display complete dataset 4x4 */
if (H5Dread(did, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, buf) < 0) TEST_ERROR;
#if defined (PRINT_DATA)
printf("\n");
printf("dataset: \n");
for (jj = 0; jj < dims[0]; jj++) {
for (ii = 0; ii < dims[1]; ii++) printf("%d ", buf[jj][ii]);
printf("\n");
}
#endif
/* increment start in dim 1 */
start[1] += 2;
}
/* increment start in dim 0 */
start[0] += 2;
}
/*-------------------------------------------------------------------------
* close
*-------------------------------------------------------------------------
*/
if (H5Dclose(did) < 0) TEST_ERROR
if (H5Sclose(f_sid) < 0) TEST_ERROR
if (H5Sclose(m_sid) < 0) TEST_ERROR
if (H5Pclose(pid) < 0) TEST_ERROR
if (H5Fclose(fid) < 0) TEST_ERROR
PASSED();
puts("All chunk info tests passed.");
return 0;
error:
H5Dclose( did );
H5Sclose( f_sid );
H5Sclose( m_sid );
H5Pclose( pid );
H5Fclose( fid );
H5_FAILED();
return 1;
}
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