95 lines
2.1 KiB
Erlang
95 lines
2.1 KiB
Erlang
%%%----------------------------------------------------------------------
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%%% File : stringprep.erl
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%%% Author : Alexey Shchepin <alexey@sevcom.net>
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%%% Purpose : Interface to stringprep_drv
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%%% Created : 16 Feb 2003 by Alexey Shchepin <alexey@sevcom.net>
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%%% Id : $Id$
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%%%----------------------------------------------------------------------
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-module(stringprep).
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-author('alexey@sevcom.net').
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-vsn('$Revision$ ').
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-behaviour(gen_server).
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-export([start/0, start_link/0,
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tolower/1,
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nameprep/1,
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nodeprep/1,
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resourceprep/1]).
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%% Internal exports, call-back functions.
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-export([init/1,
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handle_call/3,
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handle_cast/2,
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handle_info/2,
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code_change/3,
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terminate/2]).
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-define(NAMEPREP_COMMAND, 1).
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-define(NODEPREP_COMMAND, 2).
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-define(RESOURCEPREP_COMMAND, 3).
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start() ->
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gen_server:start({local, ?MODULE}, ?MODULE, [], []).
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start_link() ->
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gen_server:start_link({local, ?MODULE}, ?MODULE, [], []).
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init([]) ->
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ok = erl_ddll:load_driver(ejabberd:get_so_path(), stringprep_drv),
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Port = open_port({spawn, stringprep_drv}, []),
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ets:new(stringprep_table, [set, public, named_table]),
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ets:insert(stringprep_table, {port, Port}),
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{ok, Port}.
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%%% --------------------------------------------------------
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%%% The call-back functions.
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%%% --------------------------------------------------------
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handle_call(_, _, State) ->
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{noreply, State}.
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handle_cast(_, State) ->
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{noreply, State}.
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handle_info({'EXIT', Pid, Reason}, Port) ->
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{noreply, Port};
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handle_info({'EXIT', Port, Reason}, Port) ->
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{stop, {port_died, Reason}, Port};
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handle_info(_, State) ->
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{noreply, State}.
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code_change(OldVsn, State, Extra) ->
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{ok, State}.
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terminate(_Reason, Port) ->
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Port ! {self, close},
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ok.
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tolower(String) ->
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control(0, String).
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nameprep(String) ->
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control(?NAMEPREP_COMMAND, String).
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nodeprep(String) ->
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control(?NODEPREP_COMMAND, String).
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resourceprep(String) ->
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control(?RESOURCEPREP_COMMAND, String).
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control(Command, String) ->
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[{port, Port} | _] = ets:lookup(stringprep_table, port),
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case port_control(Port, Command, String) of
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[0 | _] -> error;
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[1 | Res] -> Res
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end.
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