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gsm_coder

1.0.3
1.0.3 1.0.2 1.0.1 1.0.0

A GSM 7/8 character strings encoder/decoder for Erlang based on the implementation from Android Open Source Project.

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gsm_coder src gsm_coder.erl
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src/gsm_coder.erl 

%%% Created : 11 Apr 2019 by Danil Onishchenko <onishchenko@svyazcom.ru>

%%% Improvements - Silviu Caragea <silviu.cpp@gmail.com>



-module(gsm_coder).



-define(NOT_LOADED, not_loaded(?LINE)).



-type reason() :: any().



-on_load(load_nif/0).



-export([

    utf8_check_gsm7/1,

    sms_text_parts_number/1,

    utf8_to_gsm7/1,

    utf8_from_gsm7/1,

    utf8_to_gsm8/1,

    utf8_from_gsm8/1

]).



-spec utf8_check_gsm7(binary()) ->

    boolean() | {error, reason()}.



utf8_check_gsm7(_Bin) ->

    ?NOT_LOADED.



-spec sms_text_parts_number(binary()) ->

    integer() | {error, reason()}.



sms_text_parts_number(_Bin) ->

    ?NOT_LOADED.



-spec utf8_to_gsm7(binary()) ->

    binary() | {error, reason()}.



utf8_to_gsm7(_Bin) ->

    ?NOT_LOADED.



-spec utf8_from_gsm7(binary()) ->

    binary() | {error, reason()}.



utf8_from_gsm7(_Bin) ->

    ?NOT_LOADED.



-spec utf8_to_gsm8(binary()) ->

    binary() | {error, reason()}.



utf8_to_gsm8(_Bin) ->

    ?NOT_LOADED.



-spec utf8_from_gsm8(binary()) ->

    binary() | {error, reason()}.



utf8_from_gsm8(_Bin) ->

    ?NOT_LOADED.



% internals



load_nif() ->

    ok = erlang:load_nif(get_priv_path(?MODULE), 0).



get_priv_path(File) ->

    case code:priv_dir(gsm_coder) of

        {error, bad_name} ->

            Ebin = filename:dirname(code:which(?MODULE)),

            filename:join([filename:dirname(Ebin), "priv", File]);

        Dir ->

            filename:join(Dir, File)

    end.



not_loaded(Line) ->

    erlang:nif_error({not_loaded, [{module, ?MODULE}, {line, Line}]}).