diff options
Diffstat (limited to 'c++/examples/h5tutr_extend.cpp')
| -rw-r--r-- | c++/examples/h5tutr_extend.cpp | 218 |
1 files changed, 109 insertions, 109 deletions
diff --git a/c++/examples/h5tutr_extend.cpp b/c++/examples/h5tutr_extend.cpp index 8c1bc03..b6927ea 100644 --- a/c++/examples/h5tutr_extend.cpp +++ b/c++/examples/h5tutr_extend.cpp @@ -1,8 +1,8 @@ /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * - * Copyright by The HDF Group. * - * Copyright by the Board of Trustees of the University of Illinois. * - * All rights reserved. * - * * + * 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 * @@ -24,17 +24,17 @@ using std::endl; #include "H5Cpp.h" using namespace H5; -const H5std_string FILE_NAME("h5tutr_extend.h5"); -const H5std_string DATASETNAME("ExtendibleArray"); +const H5std_string FILE_NAME("h5tutr_extend.h5"); +const H5std_string DATASETNAME("ExtendibleArray"); int main (void) { - hsize_t dims[2] = {3,3}; // dataset dimensions at creation + 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} }; + 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 @@ -42,127 +42,127 @@ int main (void) 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} }; + {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) ); + // 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]; - - // Open the file and dataset. - file.openFile(FILE_NAME, H5F_ACC_RDONLY); - dataset = new DataSet(file.openDataSet( DATASETNAME)); - - // Get the dataset's dataspace and creation property list. - filespace = new DataSpace(dataset->getSpace()); - prop = dataset->getCreatePlist(); - - // Get information to obtain memory dataspace. - rank = filespace->getSimpleExtentNdims(); - herr_t status_n = filespace->getSimpleExtentDims(dimsr); - - if (H5D_CHUNKED == prop.getLayout()) - rank_chunk = prop.getChunk(rank, chunk_dimsr); - cout << "rank chunk = " << rank_chunk << endl;; - - memspace = new DataSpace(rank, dimsr, NULL); - dataset->read(rdata, PredType::NATIVE_INT, *memspace, *filespace); + // 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]; + + // Open the file and dataset. + file.openFile(FILE_NAME, H5F_ACC_RDONLY); + dataset = new DataSet(file.openDataSet( DATASETNAME)); + + // Get the dataset's dataspace and creation property list. + filespace = new DataSpace(dataset->getSpace()); + prop = dataset->getCreatePlist(); + + // Get information to obtain memory dataspace. + rank = filespace->getSimpleExtentNdims(); + herr_t status_n = filespace->getSimpleExtentDims(dimsr); + + if (H5D_CHUNKED == prop.getLayout()) + rank_chunk = prop.getChunk(rank, chunk_dimsr); + cout << "rank chunk = " << rank_chunk << endl;; + + 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(); + 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.printErrorStack(); - return -1; + error.printErrorStack(); + return -1; } // catch failure caused by the DataSet operations catch(DataSetIException error) { - error.printErrorStack(); - return -1; + error.printErrorStack(); + return -1; } // catch failure caused by the DataSpace operations catch(DataSpaceIException error) { - error.printErrorStack(); - return -1; + error.printErrorStack(); + return -1; } return 0; // successfully terminated |