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(*
Title: Standard Basis Library: NetServDB 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_SERV_DB =
sig
type entry
val name : entry -> string
val aliases : entry -> string list
val port : entry -> int
val protocol : entry -> string
val getByName : string * string option -> entry option
val getByPort : int * string option -> entry option
end;
structure NetServDB :> NET_SERV_DB =
struct
type entry = string * string list * int * string
(* 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 port : entry -> int = #3
val protocol : entry -> string = #4
local
val doCall1: string -> result
= RunCall.rtsCallFull1 "PolyNetworkGetServByName"
and doCall2: string*string -> result
= RunCall.rtsCallFull2 "PolyNetworkGetServByNameAndProtocol"
in
fun getByName(s, NONE) =
(case doCall1 s of AResult r => SOME r | NoResult => NONE)
| getByName(s, SOME p) =
(case doCall2(s, p) of AResult r => SOME r | NoResult => NONE)
end
local
val doCall1: int -> result
= RunCall.rtsCallFull1 "PolyNetworkGetServByPort"
and doCall2: int*string -> result
= RunCall.rtsCallFull2 "PolyNetworkGetServByPortAndProtocol"
in
fun getByPort(n, NONE) =
(case doCall1 n of AResult r => SOME r | NoResult => NONE)
| getByPort(n, SOME p) =
(case doCall2(n, p) of AResult r => SOME r | NoResult => NONE)
end
end;
|
