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Diffstat (limited to 'c++/src/H5DataSet.cpp')
| -rw-r--r-- | c++/src/H5DataSet.cpp | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/c++/src/H5DataSet.cpp b/c++/src/H5DataSet.cpp new file mode 100644 index 0000000..1cc66a2 --- /dev/null +++ b/c++/src/H5DataSet.cpp @@ -0,0 +1,207 @@ +#include <string> + +#include "H5Include.h" +#include "H5RefCounter.h" +#include "H5Exception.h" +#include "H5IdComponent.h" +#include "H5Idtemplates.h" +#include "H5PropList.h" +#include "H5Object.h" +#include "H5PropList.h" +#include "H5DxferProp.h" +#include "H5DataType.h" +#include "H5DcreatProp.h" +#include "H5DataSpace.h" +#include "H5AbstractDs.h" +#include "H5DataSet.h" + +#ifndef H5_NO_NAMESPACE +namespace H5 { +#endif + +// Default constructor +DataSet::DataSet() : AbstractDs() {} + +// Creates a copy of DataSet using an existing id +DataSet::DataSet( const hid_t dataset_id ) : AbstractDs( dataset_id ) {} + +// Copy constructor makes a copy of the original object by using base +// class' copy constructors +DataSet::DataSet( const DataSet& original ) : AbstractDs( original ) {} + +// Gets a copy of the dataspace of this dataset +DataSpace DataSet::getSpace() const +{ + // Calls C function H5Dget_space to get the id of the dataspace + hid_t dataspace_id = H5Dget_space( id ); + + // If the dataspace id is invalid, throw an exception + if( dataspace_id <= 0 ) + { + throw DataSetIException(); + } + //create dataspace object using the existing id then return the object + DataSpace data_space( dataspace_id ); + return( data_space ); +} + +// This private member function calls the C API to get the identifier +// of the datatype that is used by this dataset. It is used +// by the various AbstractDs functions to get the specific datatype. +hid_t DataSet::p_getType() const +{ + hid_t type_id = H5Dget_type( id ); + if( type_id > 0 ) + return( type_id ); + else + { + throw DataSetIException(); + } +} + +// Gets the dataset creation property list +DSetCreatPropList DataSet::getCreatePlist() const +{ + hid_t create_plist_id = H5Dget_create_plist( id ); + if( create_plist_id <= 0 ) + { + throw DataSetIException(); + } + // create and return the DSetCreatPropList object + DSetCreatPropList create_plist( create_plist_id ); + return( create_plist ); +} + +// Returns the amount of storage required for a dataset. +hsize_t DataSet::getStorageSize() const +{ + hsize_t storage_size = H5Dget_storage_size( id ); + + if( storage_size > 0 ) + return( storage_size ); + else + { + throw DataSetIException(); + } +} + +// Returns the number of bytes required to store VL data. +hsize_t DataSet::getVlenBufSize( DataType& type, DataSpace& space ) const +{ + //herr_t ret_value; + // Obtain identifiers for C API + //hid_t type_id = type.getId(); + //hid_t space_id = space.getId(); + //hsize_t size; + + throw DataSetIException( "getVlenBufSize: Currently not implemented yet."); + //ret_value = H5Dget_vlen_buf_size( id, type_id, space_id, &size ); + //if( ret_value >= 0 ) + // return( size ); + //else + //{ + //throw DataSetIException(); + //} +} + +// Reclaims VL datatype memory buffers. +void DataSet::vlenReclaim( DataType& type, DataSpace& space, DSetMemXferPropList& xfer_plist, void* buf ) const +{ + herr_t ret_value; + // Obtain identifiers for C API + hid_t type_id = type.getId(); + hid_t space_id = space.getId(); + hid_t xfer_plist_id = xfer_plist.getId(); + + ret_value = H5Dvlen_reclaim( type_id, space_id, xfer_plist_id, buf ); + if( ret_value < 0 ) + { + throw DataSetIException(); + } +} + +// Reads raw data from the specified dataset into buf, converting from +// file datatype and dataspace to memory datatype and dataspace. +void DataSet::read( void* buf, const DataType& mem_type, const DataSpace& mem_space, const DataSpace& file_space, const DSetMemXferPropList& xfer_plist ) const +{ + // Obtain identifiers for C API + hid_t mem_type_id = mem_type.getId(); + hid_t mem_space_id = mem_space.getId(); + hid_t file_space_id = file_space.getId(); + hid_t xfer_plist_id = xfer_plist.getId(); + + herr_t ret_value = H5Dread( id, mem_type_id, mem_space_id, file_space_id, xfer_plist_id, buf ); + if( ret_value < 0 ) + { + throw DataSetIException(); + } +} + +// Writes raw data from an application buffer buffer to a dataset, +// converting from memory datatype and dataspace to file datatype +// and dataspace. +void DataSet::write( const void* buf, const DataType& mem_type, const DataSpace& mem_space, const DataSpace& file_space, const DSetMemXferPropList& xfer_plist ) const +{ + // Obtain identifiers for C API + hid_t mem_type_id = mem_type.getId(); + hid_t mem_space_id = mem_space.getId(); + hid_t file_space_id = file_space.getId(); + hid_t xfer_plist_id = xfer_plist.getId(); + + herr_t ret_value = H5Dwrite( id, mem_type_id, mem_space_id, file_space_id, xfer_plist_id, buf ); + if( ret_value < 0 ) + { + throw DataSetIException(); + } +} + +// Iterates over all selected elements in a dataspace. +int DataSet::iterateElems( void* buf, const DataType& type, const DataSpace& space, H5D_operator_t op, void* op_data ) +{ + // Obtain identifiers for C API + hid_t type_id = type.getId(); + hid_t space_id = space.getId(); + herr_t ret_value = H5Diterate( buf, type_id, space_id, op, op_data ); + if( ret_value >= 0 ) + return( ret_value ); + else // raise exception when H5Diterate returns a negative value + { + throw DataSetIException(); + } +} + +// Extends a dataset with unlimited dimension. +void DataSet::extend( const hsize_t* size ) const +{ + herr_t ret_value = H5Dextend( id, size ); + if( ret_value < 0 ) // raise exception when H5Dextend returns a neg value + { + throw DataSetIException(); + } +} + +// This private function calls the C API H5Dclose to close this dataset. +// Used by IdComponent::reset +void DataSet::p_close() const +{ + herr_t ret_value = H5Dclose( id ); + if( ret_value < 0 ) + { + throw DataSetIException(); + } +} + +// The destructor of this instance calls IdComponent::reset to +// reset its identifier - no longer true +// Older compilers (baldric) don't support template member functions +// and IdComponent::reset is one; so at this time, the resetId is not +// a member function so it can be template to work around that problem. +DataSet::~DataSet() +{ + // The dataset id will be closed properly + resetIdComponent( this ); +} + +#ifndef H5_NO_NAMESPACE +} // end namespace +#endif |