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authorBinh-Minh Ribler <bmribler@hdfgroup.org>2013-09-20 12:16:23 (GMT)
committerBinh-Minh Ribler <bmribler@hdfgroup.org>2013-09-20 12:16:23 (GMT)
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parentc965b5503b845c92fd8807dec81a21504dfc0b06 (diff)
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[svn-r24174] Purpose: Add examples
Description: Added tutorial examples that Barbara made following the C tutorial examples. They will be configured for daily test. Platforms tested: Linux/32 2.6 (jam) - tested by running a script that compiled them with h5c++ and executing the examples; output are checked manually
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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. *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*
+ * This example illustrates how to create a dataset that is a 4 x 6
+ * array. It is used in the HDF5 Tutorial.
+ */
+
+#include <iostream>
+#include <string>
+
+#include "H5Cpp.h"
+
+#ifndef H5_NO_NAMESPACE
+ using namespace H5;
+#ifndef H5_NO_STD
+ using std::cout;
+ using std::endl;
+#endif // H5_NO_STD
+#endif
+
+const H5std_string FILE_NAME("extend.h5");
+const H5std_string DATASETNAME("ExtendibleArray");
+
+int main (void)
+{
+
+ hsize_t dims[2] = {3,3}; // dataset dimensions at creation
+ hsize_t maxdims[2] = {H5S_UNLIMITED, H5S_UNLIMITED};
+ hsize_t chunk_dims[2] ={2, 5};
+
+ int data[3][3] = { {1, 1, 1}, // data to write
+ {1, 1, 1},
+ {1, 1, 1} };
+
+ // Variables used in extending and writing to the extended portion of dataset
+
+ hsize_t size[2];
+ hsize_t offset[2];
+ hsize_t dimsext[2] = {7, 3}; // extend dimensions
+ int dataext[7][3] = { {2, 3, 4},
+ {2, 3, 4},
+ {2, 3, 4},
+ {2, 3, 4},
+ {2, 3, 4},
+ {2, 3, 4},
+ {2, 3, 4} };
+
+ // 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 a new file using the default property lists.
+ H5File file(FILE_NAME, H5F_ACC_TRUNC);
+
+ // Create the data space for the dataset. Note the use of pointer
+ // for the instance 'dataspace'. It can be deleted and used again
+ // later for another dataspace. An HDF5 identifier can be closed
+ // by the destructor or the method 'close()'.
+ DataSpace *dataspace = new DataSpace (2, dims, maxdims);
+
+ // Modify dataset creation property to enable chunking
+ DSetCreatPropList prop;
+ prop.setChunk(2, chunk_dims);
+
+ // Create the chunked dataset. Note the use of pointer.
+ DataSet *dataset = new DataSet(file.createDataSet( DATASETNAME,
+ PredType::STD_I32BE, *dataspace, prop) );
+
+ // Write data to dataset.
+ dataset->write(data, PredType::NATIVE_INT);
+
+ // Extend the dataset. Dataset becomes 10 x 3.
+ size[0] = dims[0] + dimsext[0];
+ size[1] = dims[1];
+ dataset->extend(size);
+
+ // Select a hyperslab in extended portion of the dataset.
+ DataSpace *filespace = new DataSpace(dataset->getSpace ());
+ offset[0] = 3;
+ offset[1] = 0;
+ filespace->selectHyperslab(H5S_SELECT_SET, dimsext, offset);
+
+ // Define memory space.
+ DataSpace *memspace = new DataSpace(2, dimsext, NULL);
+
+ // Write data to the extended portion of the dataset.
+ dataset->write(dataext, PredType::NATIVE_INT, *memspace, *filespace);
+
+ // Close all objects and file.
+ prop.close();
+ delete filespace;
+ delete memspace;
+ delete dataspace;
+ delete dataset;
+ file.close();
+
+ // ---------------------------------------
+ // Re-open the file and read the data back
+ // ---------------------------------------
+
+ int rdata[10][3];
+ int i,j, rank, rank_chunk;
+ hsize_t chunk_dimsr[2], dimsr[2];
+
+ file.openFile(FILE_NAME, H5F_ACC_RDONLY);
+
+ dataset = new DataSet(file.openDataSet( DATASETNAME));
+
+ filespace = new DataSpace(dataset->getSpace());
+
+ prop = dataset->getCreatePlist();
+ rank = filespace->getSimpleExtentNdims();
+ herr_t status_n = filespace->getSimpleExtentDims(dimsr);
+
+ if (H5D_CHUNKED == prop.getLayout())
+ rank_chunk = prop.getChunk(rank, chunk_dimsr);
+
+ memspace = new DataSpace(rank, dimsr, NULL);
+ dataset->read(rdata, PredType::NATIVE_INT, *memspace, *filespace);
+
+ cout << endl;
+ for (j = 0; j < dimsr[0]; j++) {
+ for (i = 0; i < dimsr[1]; i++)
+ cout << " " << rdata[j][i];
+ cout << endl;
+ }
+
+ // Close all objects and file.
+ prop.close();
+ delete filespace;
+ delete memspace;
+ delete dataset;
+ file.close();
+
+ } // end of try block
+
+ // catch failure caused by the H5File operations
+ catch(FileIException error)
+ {
+ error.printError();
+ return -1;
+ }
+
+ // catch failure caused by the DataSet operations
+ catch(DataSetIException error)
+ {
+ error.printError();
+ return -1;
+ }
+
+ // catch failure caused by the DataSpace operations
+ catch(DataSpaceIException error)
+ {
+ error.printError();
+ return -1;
+ }
+
+ return 0; // successfully terminated
+}
+