diff options
author | Allen Byrne <byrn@hdfgroup.org> | 2020-10-01 14:04:36 (GMT) |
---|---|---|
committer | Allen Byrne <byrn@hdfgroup.org> | 2020-10-01 14:04:36 (GMT) |
commit | f1ba03cea5b82699a984c80bd2deac14fdc8df18 (patch) | |
tree | ebe777c3e0b83f4c4cec9212731da9ebe0a0cfd3 /c++/examples/readdata.cpp | |
parent | 10343c197906415388f2a4c8d292e21d25cf7381 (diff) | |
download | hdf5-f1ba03cea5b82699a984c80bd2deac14fdc8df18.zip hdf5-f1ba03cea5b82699a984c80bd2deac14fdc8df18.tar.gz hdf5-f1ba03cea5b82699a984c80bd2deac14fdc8df18.tar.bz2 |
Source formatted
Diffstat (limited to 'c++/examples/readdata.cpp')
-rw-r--r-- | c++/examples/readdata.cpp | 348 |
1 files changed, 169 insertions, 179 deletions
diff --git a/c++/examples/readdata.cpp b/c++/examples/readdata.cpp index 3df8191..e088cce 100644 --- a/c++/examples/readdata.cpp +++ b/c++/examples/readdata.cpp @@ -29,184 +29,174 @@ using std::endl; #include "H5Cpp.h" using namespace H5; -const H5std_string FILE_NAME( "SDS.h5" ); -const H5std_string DATASET_NAME( "IntArray" ); -const int NX_SUB = 3; // hyperslab dimensions -const int NY_SUB = 4; -const int NX = 7; // output buffer dimensions -const int NY = 7; -const int NZ = 3; -const int RANK_OUT = 3; - -int main (void) +const H5std_string FILE_NAME("SDS.h5"); +const H5std_string DATASET_NAME("IntArray"); +const int NX_SUB = 3; // hyperslab dimensions +const int NY_SUB = 4; +const int NX = 7; // output buffer dimensions +const int NY = 7; +const int NZ = 3; +const int RANK_OUT = 3; + +int +main(void) { - /* - * Output buffer initialization. - */ - int i, j, k; - int data_out[NX][NY][NZ ]; /* output buffer */ - for (j = 0; j < NX; j++) - { - for (i = 0; i < NY; i++) - { - for (k = 0; k < NZ ; k++) - data_out[j][i][k] = 0; - } - } - - /* - * 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(); - - /* - * Open the specified file and the specified dataset in the file. - */ - H5File file( FILE_NAME, H5F_ACC_RDONLY ); - DataSet dataset = file.openDataSet( DATASET_NAME ); - - /* - * Get the class of the datatype that is used by the dataset. - */ - H5T_class_t type_class = dataset.getTypeClass(); - - /* - * Get class of datatype and print message if it's an integer. - */ - if( type_class == H5T_INTEGER ) - { - cout << "Data set has INTEGER type" << endl; - - /* - * Get the integer datatype - */ - IntType intype = dataset.getIntType(); - - /* - * Get order of datatype and print message if it's a little endian. - */ - H5std_string order_string; - H5T_order_t order = intype.getOrder( order_string ); - cout << order_string << endl; - - /* - * Get size of the data element stored in file and print it. - */ - size_t size = intype.getSize(); - cout << "Data size is " << size << endl; - } - - /* - * Get dataspace of the dataset. - */ - DataSpace dataspace = dataset.getSpace(); - - /* - * Get the number of dimensions in the dataspace. - */ - int rank = dataspace.getSimpleExtentNdims(); - - /* - * Get the dimension size of each dimension in the dataspace and - * display them. - */ - hsize_t dims_out[2]; - int ndims = dataspace.getSimpleExtentDims( dims_out, NULL); - cout << "rank " << rank << ", dimensions " << - (unsigned long)(dims_out[0]) << " x " << - (unsigned long)(dims_out[1]) << endl; - - /* - * Define hyperslab in the dataset; implicitly giving strike and - * block NULL. - */ - hsize_t offset[2]; // hyperslab offset in the file - hsize_t count[2]; // size of the hyperslab in the file - offset[0] = 1; - offset[1] = 2; - count[0] = NX_SUB; - count[1] = NY_SUB; - dataspace.selectHyperslab( H5S_SELECT_SET, count, offset ); - - /* - * Define the memory dataspace. - */ - hsize_t dimsm[3]; /* memory space dimensions */ - dimsm[0] = NX; - dimsm[1] = NY; - dimsm[2] = NZ ; - DataSpace memspace( RANK_OUT, dimsm ); - - /* - * Define memory hyperslab. - */ - hsize_t offset_out[3]; // hyperslab offset in memory - hsize_t count_out[3]; // size of the hyperslab in memory - offset_out[0] = 3; - offset_out[1] = 0; - offset_out[2] = 0; - count_out[0] = NX_SUB; - count_out[1] = NY_SUB; - count_out[2] = 1; - memspace.selectHyperslab( H5S_SELECT_SET, count_out, offset_out ); - - /* - * Read data from hyperslab in the file into the hyperslab in - * memory and display the data. - */ - dataset.read( data_out, PredType::NATIVE_INT, memspace, dataspace ); - - for (j = 0; j < NX; j++) - { - for (i = 0; i < NY; i++) - cout << data_out[j][i][0] << " "; - cout << endl; - } - /* - * 0 0 0 0 0 0 0 - * 0 0 0 0 0 0 0 - * 0 0 0 0 0 0 0 - * 3 4 5 6 0 0 0 - * 4 5 6 7 0 0 0 - * 5 6 7 8 0 0 0 - * 0 0 0 0 0 0 0 - */ - } // 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; // successfully terminated + /* + * Output buffer initialization. + */ + int i, j, k; + int data_out[NX][NY][NZ]; /* output buffer */ + for (j = 0; j < NX; j++) { + for (i = 0; i < NY; i++) { + for (k = 0; k < NZ; k++) + data_out[j][i][k] = 0; + } + } + + /* + * 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(); + + /* + * Open the specified file and the specified dataset in the file. + */ + H5File file(FILE_NAME, H5F_ACC_RDONLY); + DataSet dataset = file.openDataSet(DATASET_NAME); + + /* + * Get the class of the datatype that is used by the dataset. + */ + H5T_class_t type_class = dataset.getTypeClass(); + + /* + * Get class of datatype and print message if it's an integer. + */ + if (type_class == H5T_INTEGER) { + cout << "Data set has INTEGER type" << endl; + + /* + * Get the integer datatype + */ + IntType intype = dataset.getIntType(); + + /* + * Get order of datatype and print message if it's a little endian. + */ + H5std_string order_string; + H5T_order_t order = intype.getOrder(order_string); + cout << order_string << endl; + + /* + * Get size of the data element stored in file and print it. + */ + size_t size = intype.getSize(); + cout << "Data size is " << size << endl; + } + + /* + * Get dataspace of the dataset. + */ + DataSpace dataspace = dataset.getSpace(); + + /* + * Get the number of dimensions in the dataspace. + */ + int rank = dataspace.getSimpleExtentNdims(); + + /* + * Get the dimension size of each dimension in the dataspace and + * display them. + */ + hsize_t dims_out[2]; + int ndims = dataspace.getSimpleExtentDims(dims_out, NULL); + cout << "rank " << rank << ", dimensions " << (unsigned long)(dims_out[0]) << " x " + << (unsigned long)(dims_out[1]) << endl; + + /* + * Define hyperslab in the dataset; implicitly giving strike and + * block NULL. + */ + hsize_t offset[2]; // hyperslab offset in the file + hsize_t count[2]; // size of the hyperslab in the file + offset[0] = 1; + offset[1] = 2; + count[0] = NX_SUB; + count[1] = NY_SUB; + dataspace.selectHyperslab(H5S_SELECT_SET, count, offset); + + /* + * Define the memory dataspace. + */ + hsize_t dimsm[3]; /* memory space dimensions */ + dimsm[0] = NX; + dimsm[1] = NY; + dimsm[2] = NZ; + DataSpace memspace(RANK_OUT, dimsm); + + /* + * Define memory hyperslab. + */ + hsize_t offset_out[3]; // hyperslab offset in memory + hsize_t count_out[3]; // size of the hyperslab in memory + offset_out[0] = 3; + offset_out[1] = 0; + offset_out[2] = 0; + count_out[0] = NX_SUB; + count_out[1] = NY_SUB; + count_out[2] = 1; + memspace.selectHyperslab(H5S_SELECT_SET, count_out, offset_out); + + /* + * Read data from hyperslab in the file into the hyperslab in + * memory and display the data. + */ + dataset.read(data_out, PredType::NATIVE_INT, memspace, dataspace); + + for (j = 0; j < NX; j++) { + for (i = 0; i < NY; i++) + cout << data_out[j][i][0] << " "; + cout << endl; + } + /* + * 0 0 0 0 0 0 0 + * 0 0 0 0 0 0 0 + * 0 0 0 0 0 0 0 + * 3 4 5 6 0 0 0 + * 4 5 6 7 0 0 0 + * 5 6 7 8 0 0 0 + * 0 0 0 0 0 0 0 + */ + } // 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; // successfully terminated } - |