HDF5 C++ API Reference Manual

 

 

 

H5DataSet.h

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// Class DataSet inherits from AbstractDs and provides accesses to a dataset.

#ifndef _H5DataSet_H
#define _H5DataSet_H

#ifndef H5_NO_NAMESPACE
namespace H5 {
#endif

class H5_DLLCPP DataSet : public AbstractDs {
   public:
        // Extends the dataset with unlimited dimension.
        void extend( const hsize_t* size ) const;

        // Fills a selection in memory with a value
        void fillMemBuf(const void *fill, DataType& fill_type, void *buf, DataType& buf_type, DataSpace& space);
        // Fills a selection in memory with zero 
        void fillMemBuf(void *buf, DataType& buf_type, DataSpace& space);

        // Gets the creation property list of this dataset.
        DSetCreatPropList getCreatePlist() const;

        // Returns the address of this dataset in the file.
        haddr_t getOffset() const;
        
        // Gets the dataspace of this dataset.
        virtual DataSpace getSpace() const;

        // Determines whether space has been allocated for a dataset.
        void getSpaceStatus(H5D_space_status_t& status) const;

        // Returns the amount of storage size required for this dataset.
        virtual hsize_t getStorageSize() const;

        // not yet implemented??
        hsize_t getVlenBufSize( DataType& type, DataSpace& space ) const;
        void vlenReclaim( DataType& type, DataSpace& space, DSetMemXferPropList& xfer_plist, void* buf ) const;

        // Reads the data of this dataset and stores it in the provided buffer.
        // The memory and file dataspaces and the transferring property list
        // can be defaults.
        void read( void* buf, const DataType& mem_type, const DataSpace& mem_space = DataSpace::ALL, const DataSpace& file_space = DataSpace::ALL, const DSetMemXferPropList& xfer_plist = DSetMemXferPropList::DEFAULT ) const;
        void read( string& buf, const DataType& mem_type, const DataSpace& mem_space = DataSpace::ALL, const DataSpace& file_space = DataSpace::ALL, const DSetMemXferPropList& xfer_plist = DSetMemXferPropList::DEFAULT ) const;

        // Writes the buffered data to this dataset.
        // The memory and file dataspaces and the transferring property list
        // can be defaults.
        void write( const void* buf, const DataType& mem_type, const DataSpace& mem_space = DataSpace::ALL, const DataSpace& file_space = DataSpace::ALL, const DSetMemXferPropList& xfer_plist = DSetMemXferPropList::DEFAULT ) const;
        void write( const string& buf, const DataType& mem_type, const DataSpace& mem_space = DataSpace::ALL, const DataSpace& file_space = DataSpace::ALL, const DSetMemXferPropList& xfer_plist = DSetMemXferPropList::DEFAULT ) const;

        // Iterates the selected elements in the specified dataspace - not implemented in C++ style yet
        int iterateElems( void* buf, const DataType& type, const DataSpace& space, H5D_operator_t op, void* op_data = NULL );

        // Retrieves the type of object that an object reference points to.
        H5G_obj_t getObjType(void *ref, H5R_type_t ref_type) const;

        // Retrieves a dataspace with the region pointed to selected.
        DataSpace getRegion(void *ref, H5R_type_t ref_type = H5R_DATASET_REGION) const;

        // Creates a reference to a named Hdf5 object or to a dataset region
        // in this object.
        void* Reference(const char* name, DataSpace& dataspace, H5R_type_t ref_type = H5R_DATASET_REGION) const;

        // Creates a reference to a named Hdf5 object in this object.
        void* Reference(const char* name) const;

        // Creates a copy of an existing DataSet using its id.
        DataSet(const hid_t existing_id);

        // Close this dataset.
        virtual void close();

        // Default constructor.
        DataSet();

        // Copy constructor.
        DataSet( const DataSet& original );

        // Destructor: properly terminates access to this dataset.
        virtual ~DataSet();

   private:
        // This function contains the common code that is used by
        // getTypeClass and various API functions getXxxType 
        // defined in AbstractDs for generic datatype and specific
        // sub-types
        virtual hid_t p_get_type() const;
};
#ifndef H5_NO_NAMESPACE
}
#endif
#endif

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