H5DataSet.h

// C++ informative line for the emacs editor: -*- C++ -*-
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 * Copyright by The HDF Group.                                               *
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#ifndef H5DataSet_H
#define H5DataSet_H
 
namespace H5 {
 
//  Inheritance: multiple H5Object/AbstractDs -> H5Location -> IdComponent
class H5_DLLCPP DataSet : public H5Object, public AbstractDs {
  public:
    // Close this dataset.
    virtual void close();
 
    // 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, const DataType &fill_type, void *buf, const DataType &buf_type,
                    const DataSpace &space) const;
    // void fillMemBuf(const void *fill, DataType& fill_type, void *buf, DataType& buf_type, DataSpace&
    // space); // removed from 1.8.18 and 1.10.1
 
    // Fills a selection in memory with zero
    void fillMemBuf(void *buf, const DataType &buf_type, const DataSpace &space) const;
    // void fillMemBuf(void *buf, DataType& buf_type, DataSpace& space); // removed from 1.8.18 and 1.10.1
 
    // Gets the creation property list of this dataset.
    DSetCreatPropList getCreatePlist() const;
 
    // Gets the access property list of this dataset.
    DSetAccPropList getAccessPlist() 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;
 
    // Returns the in memory size of this attribute's data.
    virtual size_t getInMemDataSize() const;
 
    // Returns the number of bytes required to store VL data.
    hsize_t getVlenBufSize(const DataType &type, const DataSpace &space) const;
    // hsize_t getVlenBufSize(DataType& type, DataSpace& space) const; // removed from 1.8.18 and 1.10.1
 
    // Reclaims VL datatype memory buffers.
    static void vlenReclaim(const DataType &type, const DataSpace &space,
                            const DSetMemXferPropList &xfer_plist, void *buf);
    static void vlenReclaim(void *buf, const DataType &type, const DataSpace &space = DataSpace::ALL,
                            const DSetMemXferPropList &xfer_plist = DSetMemXferPropList::DEFAULT);
 
    // 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(H5std_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 H5std_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);
 
    virtual H5std_string
    fromClass() const
    {
        return ("DataSet");
    }
 
    // Creates a dataset by way of dereference.
    DataSet(const H5Location &loc, const void *ref, H5R_type_t ref_type = H5R_OBJECT,
            const PropList &plist = PropList::DEFAULT);
    DataSet(const Attribute &attr, const void *ref, H5R_type_t ref_type = H5R_OBJECT,
            const PropList &plist = PropList::DEFAULT);
 
    // Default constructor.
    DataSet();
 
    // Copy constructor - same as the original DataSet.
    DataSet(const DataSet &original);
 
    // Assignment operator
    DataSet &operator=(const DataSet &original);
 
    // Creates a copy of an existing DataSet using its id.
    DataSet(const hid_t existing_id);
 
    // Gets the dataset id.
    virtual hid_t getId() const;
 
    // Destructor: properly terminates access to this dataset.
    virtual ~DataSet();
 
  protected:
#ifndef DOXYGEN_SHOULD_SKIP_THIS
    // Sets the dataset id.
    virtual void p_setId(const hid_t new_id);
#endif // DOXYGEN_SHOULD_SKIP_THIS
 
  private:
    hid_t id; // HDF5 dataset id
 
    // 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;
 
    // Reads variable or fixed len strings from this dataset.
    void p_read_fixed_len(const hid_t mem_type_id, const hid_t mem_space_id, const hid_t file_space_id,
                          const hid_t xfer_plist_id, H5std_string &strg) const;
    void p_read_variable_len(const hid_t mem_type_id, const hid_t mem_space_id, const hid_t file_space_id,
                             const hid_t xfer_plist_id, H5std_string &strg) const;
 
    // Friend function to set DataSet id.  For library use only.
    friend void f_DataSet_setId(DataSet *dset, hid_t new_id);
 
}; // end of DataSet
} // namespace H5
 
#endif // H5DataSet_H