Get the name of the global parameter at a given index within the
Table astParameterName
This function is intended primarily as a means of iterating round all the parameters in a Table. For this purpose, the number of parameters in the Table is given by the Nparameter attribute of the Table. This function could then be called in a loop, with the index value going from zero to one less than Nparameter.
Note, the index associated with a parameter decreases monotonically with the age of the parameter: the oldest Parameter in the Table will have index one, and the Parameter added most recently to the Table will have the largest index.
" Nparameter" . The returned pointer is guaranteed to remain valid and the string to which it points will not be over-written for a total of 50 successive invocations of this function. After this, the memory containing the string may be re-used, so a copy of the string should be made if it is needed for longer than this.
A NULL pointer will be returned if this function is invoked with the AST error status set, or if it should fail for any reason.