83 lines
2.6 KiB
Erlang
83 lines
2.6 KiB
Erlang
%%%----------------------------------------------------------------------
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%%% File : iconv.erl
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%%% Author : Alexey Shchepin <alexey@process-one.net>
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%%% Purpose : Interface to libiconv
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%%% Created : 16 Feb 2003 by Alexey Shchepin <alexey@process-one.net>
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%%%
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%%%
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%%% ejabberd, Copyright (C) 2002-2013 ProcessOne
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%%%
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%%% This program is free software; you can redistribute it and/or
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%%% modify it under the terms of the GNU General Public License as
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%%% published by the Free Software Foundation; either version 2 of the
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%%% License, or (at your option) any later version.
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%%%
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%%% This program is distributed in the hope that it will be useful,
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%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
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%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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%%% General Public License for more details.
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%%%
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%%% You should have received a copy of the GNU General Public License
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%%% along with this program; if not, write to the Free Software
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%%% Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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%%% 02111-1307 USA
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%%%
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%%%----------------------------------------------------------------------
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-module(iconv).
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-author('alexey@process-one.net').
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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, handle_call/3, handle_cast/2,
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handle_info/2, code_change/3, 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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[]).
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init([]) ->
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case erl_ddll:load_driver(ejabberd:get_so_path(),
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iconv_erl)
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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) -> {noreply, State}.
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handle_cast(_, State) -> {noreply, State}.
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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({'EXIT', _Pid, _Reason}, Port) ->
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{noreply, Port};
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handle_info(_, State) -> {noreply, State}.
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code_change(_OldVsn, State, _Extra) -> {ok, State}.
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terminate(_Reason, Port) -> Port ! {self, close}, ok.
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-spec convert(binary(), binary(), binary()) -> binary().
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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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(BRes).
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