79 lines
1.8 KiB
Erlang
79 lines
1.8 KiB
Erlang
%%%----------------------------------------------------------------------
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%%% File : iconv.erl
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%%% Author : Alexey Shchepin <alexey@sevcom.net>
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%%% Purpose : Interface to libiconv
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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(iconv).
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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, convert/3]).
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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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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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case erl_ddll:load_driver(ejabberd:get_so_path(), iconv_erl) of
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ok -> ok;
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{error, already_loaded} -> ok
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end,
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Port = open_port({spawn, iconv_erl}, []),
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ets:new(iconv_table, [set, public, named_table]),
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ets:insert(iconv_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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convert(From, To, String) ->
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[{port, Port} | _] = ets:lookup(iconv_table, port),
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Bin = term_to_binary({From, To, String}),
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BRes = port_control(Port, 1, Bin),
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binary_to_list(BRes).
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