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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://www.hdfgroup.org/licenses. *
* If you do not have access to either file, you may request a copy from *
* help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*
* This example shows how to work with extendible dataset.
* In the current version of the library dataset MUST be
* chunked.
*
*/
#include <iostream>
#include <string>
using std::cout;
using std::endl;
#include <string>
#include "H5Cpp.h"
using namespace H5;
const H5std_string FILE_NAME("SDSextendible.h5");
const H5std_string DATASET_NAME("ExtendibleArray");
const int NX = 10;
const int NY = 5;
const int RANK = 2;
int
main(void)
{
/*
* Try block to detect exceptions raised by any of the calls inside it
*/
try {
/*
* Turn off the auto-printing when failure occurs so that we can
* handle the errors appropriately
*/
Exception::dontPrint();
/*
* Create the data space with unlimited dimensions.
*/
hsize_t dims[2] = {3, 3}; // dataset dimensions at creation
hsize_t maxdims[2] = {H5S_UNLIMITED, H5S_UNLIMITED};
DataSpace mspace1(RANK, dims, maxdims);
/*
* Create a new file. If file exists its contents will be overwritten.
*/
H5File file(FILE_NAME, H5F_ACC_TRUNC);
/*
* Modify dataset creation properties, i.e. enable chunking.
*/
DSetCreatPropList cparms;
hsize_t chunk_dims[2] = {2, 5};
cparms.setChunk(RANK, chunk_dims);
/*
* Set fill value for the dataset
*/
int fill_val = 0;
cparms.setFillValue(PredType::NATIVE_INT, &fill_val);
/*
* Create a new dataset within the file using cparms
* creation properties.
*/
DataSet dataset = file.createDataSet(DATASET_NAME, PredType::NATIVE_INT, mspace1, cparms);
/*
* Extend the dataset. This call assures that dataset is at least 3 x 3.
*/
hsize_t size[2];
size[0] = 3;
size[1] = 3;
dataset.extend(size);
/*
* Select a hyperslab.
*/
DataSpace fspace1 = dataset.getSpace();
hsize_t offset[2];
offset[0] = 0;
offset[1] = 0;
hsize_t dims1[2] = {3, 3}; /* data1 dimensions */
fspace1.selectHyperslab(H5S_SELECT_SET, dims1, offset);
/*
* Write the data to the hyperslab.
*/
int data1[3][3] = {{1, 1, 1}, /* data to write */
{1, 1, 1},
{1, 1, 1}};
dataset.write(data1, PredType::NATIVE_INT, mspace1, fspace1);
/*
* Extend the dataset. Dataset becomes 10 x 3.
*/
hsize_t dims2[2] = {7, 1}; /* data2 dimensions */
dims[0] = dims1[0] + dims2[0];
size[0] = dims[0];
size[1] = dims[1];
dataset.extend(size);
/*
* Select a hyperslab.
*/
DataSpace fspace2 = dataset.getSpace();
offset[0] = 3;
offset[1] = 0;
fspace2.selectHyperslab(H5S_SELECT_SET, dims2, offset);
/*
* Define memory space
*/
DataSpace mspace2(RANK, dims2);
/*
* Write the data to the hyperslab.
*/
int data2[7] = {2, 2, 2, 2, 2, 2, 2};
dataset.write(data2, PredType::NATIVE_INT, mspace2, fspace2);
/*
* Extend the dataset. Dataset becomes 10 x 5.
*/
hsize_t dims3[2] = {2, 2}; /* data3 dimensions */
dims[1] = dims1[1] + dims3[1];
size[0] = dims[0];
size[1] = dims[1];
dataset.extend(size);
/*
* Select a hyperslab
*/
DataSpace fspace3 = dataset.getSpace();
offset[0] = 0;
offset[1] = 3;
fspace3.selectHyperslab(H5S_SELECT_SET, dims3, offset);
/*
* Define memory space.
*/
DataSpace mspace3(RANK, dims3);
/*
* Write the data to the hyperslab.
*/
int data3[2][2] = {{3, 3}, {3, 3}};
dataset.write(data3, PredType::NATIVE_INT, mspace3, fspace3);
/*
* Read the data from this dataset and display it.
*/
int i, j;
int data_out[NX][NY];
for (i = 0; i < NX; i++) {
for (j = 0; j < NY; j++)
data_out[i][j] = 0;
}
dataset.read(data_out, PredType::NATIVE_INT);
/*
* Resulting dataset
*
* 1 1 1 3 3
* 1 1 1 3 3
* 1 1 1 0 0
* 2 0 0 0 0
* 2 0 0 0 0
* 2 0 0 0 0
* 2 0 0 0 0
* 2 0 0 0 0
* 2 0 0 0 0
* 2 0 0 0 0
*/
/*
* Display the result.
*/
for (i = 0; i < NX; i++) {
for (j = 0; j < NY; j++)
cout << data_out[i][j] << " ";
cout << endl;
}
} // end of try block
// catch failure caused by the H5File operations
catch (FileIException error) {
error.printErrorStack();
return -1;
}
// catch failure caused by the DataSet operations
catch (DataSetIException error) {
error.printErrorStack();
return -1;
}
// catch failure caused by the DataSpace operations
catch (DataSpaceIException error) {
error.printErrorStack();
return -1;
}
// catch failure caused by the DataSpace operations
catch (DataTypeIException error) {
error.printErrorStack();
return -1;
}
return 0;
}
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