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(*
Title: Standard Basis Library: NetServDB Structures and Signatures
Author: David Matthews
Copyright David Matthews 2000
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
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
*)
(* G&R 2004 status: checked, no change. *)
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
val name: entry -> string = #1
val aliases : entry -> string list = #2
val port : entry -> int = #3
val protocol : entry -> string = #4
local
val doCall1: int*string -> entry
= RunCall.run_call2 RuntimeCalls.POLY_SYS_network
and doCall2: int*(string*string) -> entry
= RunCall.run_call2 RuntimeCalls.POLY_SYS_network
in
fun getByName(s, NONE) =
( SOME(doCall1(5, s)) handle OS.SysErr _ => NONE )
| getByName(s, SOME p) =
( SOME(doCall2(6, (s, p))) handle OS.SysErr _ => NONE )
end
local
val doCall1: int*int -> entry
= RunCall.run_call2 RuntimeCalls.POLY_SYS_network
and doCall2: int*(int*string) -> entry
= RunCall.run_call2 RuntimeCalls.POLY_SYS_network
in
fun getByPort(n, NONE) =
( SOME(doCall1(7, n)) handle OS.SysErr _ => NONE )
| getByPort(n, SOME p) =
( SOME(doCall2(8, (n, p))) handle OS.SysErr _ => NONE )
end
end;
|
