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(*
Title: Standard Basis Library: NetProtDB Structures and Signatures
Author: David Matthews
Copyright David Matthews 2000, 2016
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License version 2.1 as published by the Free Software Foundation.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*)
signature NET_PROT_DB =
sig
type entry
val name : entry -> string
val aliases : entry -> string list
val protocol : entry -> int
val getByName : string -> entry option
val getByNumber : int -> entry option
end;
structure NetProtDB :> NET_PROT_DB =
struct
type entry = string * string list * int
(* The RTS calls return either zero or the address of the entry. *)
datatype result = AResult of entry | NoResult
val name: entry -> string = #1
val aliases : entry -> string list = #2
val protocol : entry -> int = #3
local
val doCall: string -> result = RunCall.rtsCallFull1 "PolyNetworkGetProtByName"
in
fun getByName s =
case doCall s of AResult r => SOME r | NoResult => NONE
end
local
val doCall: int -> result = RunCall.rtsCallFull1 "PolyNetworkGetProtByNo"
in
fun getByNumber n =
case doCall n of AResult r => SOME r | NoResult => NONE
end
end;
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