// C++ informative line for the emacs editor: -*- C++ -*-
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#ifndef __H5DataSpace_H
#define __H5DataSpace_H

#ifndef H5_NO_NAMESPACE
namespace H5 {
#endif

//! Class DataSpace operates on HDF5 dataspaces.
class H5_DLLCPP DataSpace : public IdComponent {
   public:
	// Default DataSpace objects
	static const DataSpace ALL;

	// Creates a dataspace object given the space type
	DataSpace(H5S_class_t type = H5S_SCALAR);

	// Creates a simple dataspace
	DataSpace(int rank, const hsize_t * dims, const hsize_t * maxdims = NULL);

	// Creates a DataSpace object using an existing dataspace id.
	DataSpace(const hid_t space_id);

	// Copy constructor: makes a copy of the original DataSpace object.
	DataSpace(const DataSpace& original);

	// Assignment operator
	DataSpace& operator=( const DataSpace& rhs );

	// Closes this dataspace.
	virtual void close();

	// Makes copy of an existing dataspace.
	void copy(const DataSpace& like_space);

	// Copies the extent of this dataspace.
	void extentCopy(const DataSpace& dest_space) const;
	// Kept for backward compatibility only.
	void extentCopy(DataSpace& dest_space) const;

	// Gets the bounding box containing the current selection.
	void getSelectBounds( hsize_t* start, hsize_t* end ) const;

	// Gets the number of element points in the current selection.
	hssize_t getSelectElemNpoints() const;

	// Retrieves the list of element points currently selected.
	void getSelectElemPointlist( hsize_t startpoint, hsize_t numpoints, hsize_t *buf ) const;

	// Gets the list of hyperslab blocks currently selected.
	void getSelectHyperBlocklist( hsize_t startblock, hsize_t numblocks, hsize_t *buf ) const;

	// Get number of hyperslab blocks.
	hssize_t getSelectHyperNblocks() const;

	// Gets the number of elements in this dataspace selection.
	hssize_t getSelectNpoints() const;

	// Retrieves dataspace dimension size and maximum size.
	int getSimpleExtentDims( hsize_t *dims, hsize_t *maxdims = NULL ) const;

	// Gets the dimensionality of this dataspace.
	int getSimpleExtentNdims() const;

	// Gets the number of elements in this dataspace.
	// 12/05/00 - changed return type to hssize_t from hsize_t - C API
	hssize_t getSimpleExtentNpoints() const;

	// Gets the current class of this dataspace.
	H5S_class_t getSimpleExtentType() const;

	// Determines if this dataspace is a simple one.
	bool isSimple() const;

	// Sets the offset of this simple dataspace.
	void offsetSimple( const hssize_t* offset ) const;

	// Selects the entire dataspace.
	void selectAll() const;

	// Selects array elements to be included in the selection for
	// this dataspace.
	void selectElements( H5S_seloper_t op, const size_t num_elements, const hsize_t *coord) const;

	// Selects a hyperslab region to add to the current selected region.
	void selectHyperslab( H5S_seloper_t op, const hsize_t *count, const hsize_t *start, const hsize_t *stride = NULL, const hsize_t *block = NULL ) const;

	// Resets the selection region to include no elements.
	void selectNone() const;

	// Verifies that the selection is within the extent of the dataspace.
	bool selectValid() const;

	// Removes the extent from this dataspace.
	void setExtentNone() const;

	// Sets or resets the size of this dataspace.
	void setExtentSimple( int rank, const hsize_t *current_size, const hsize_t *maximum_size = NULL ) const;

	///\brief Returns this class name.
	virtual H5std_string fromClass () const { return("DataSpace"); }

	// Gets the dataspace id.
	virtual hid_t getId() const;

	// Destructor: properly terminates access to this dataspace.
	virtual ~DataSpace();

   private:
	hid_t id;       // HDF5 dataspace id

   protected:
#ifndef DOXYGEN_SHOULD_SKIP_THIS
	// Sets the dataspace id.
	virtual void p_setId(const hid_t new_id);
#endif // DOXYGEN_SHOULD_SKIP_THIS

};
#ifndef H5_NO_NAMESPACE
}
#endif
#endif // __H5DataSpace_H
