module Hex_desc:Exports asig..end
hash and cmp function for Mapred_sorters.generic_sorter.
      The functions are defined so that the records are sorted in an
      descending way by key. The key is interpreted as hex integer (digits
      0 to 9, a to f, A to F, possibly prefixed by + or -). 
      Characters violating the
      hex syntax are silently ignored. (Note that the integer range
      is not restricted!)val hash : string -> int -> int -> intval cmp : string -> int -> int -> string -> int -> int -> int