filename	IN:	Name of the HDF file
	rank	OUT:	Number of dimensions
	dimsizes	OUT:	Buffer for the returned dimensions
	maxrank	IN:	Size of the storage buffer dimsizes

	Purpose	Retrieves the number of dimensions (rank) of the dataset and the sizes of the dimensions (dimsizes) for the next scientific dataset in the file.
	Return value	Returns SUCCEED (or 0) if successful and FAIL (or -1) otherwise.
	Description	The maxrank parameter tells DFSDgetdims the size of the array that is allocated for storing the dimsizes array. The value of rank must not exceed the value of maxrank.
		The allocation of a buffer for the scientific dataset data should correspond to the values retrieved by DFSDgetdims. The first value in the array dimsizes should equal the first dimension of the array that is allocated to hold the dataset; the second value in dimsizes should equal the second dimension of the dataset, and so forth.

	FORTRAN	integer function dsgdims(filename, rank, dimsizes, maxrank)
		character*(*) filename
		integer rank, maxrank
		integer dimsizes(*)