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% Osmocom Erlang utility functions
% (C) 2011 by Harald Welte <laforge@gnumonks.org>
%
% All Rights Reserved
%
% This program is free software; you can redistribute it and/or modify
% it under the terms of the GNU Affero General Public License as
% published by the Free Software Foundation; either version 3 of the
% License, or (at your option) any later version.
%
% This program 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 General Public License for more details.
%
% You should have received a copy of the GNU Affero General Public License
% along with this program. If not, see <http://www.gnu.org/licenses/>.
%
% Additional Permission under GNU AGPL version 3 section 7:
%
% If you modify this Program, or any covered work, by linking or
% combining it with runtime libraries of Erlang/OTP as released by
% Ericsson on http://www.erlang.org (or a modified version of these
% libraries), containing parts covered by the terms of the Erlang Public
% License (http://www.erlang.org/EPLICENSE), the licensors of this
% Program grant you additional permission to convey the resulting work
% without the need to license the runtime libraries of Erlang/OTP under
% the GNU Affero General Public License. Corresponding Source for a
% non-source form of such a combination shall include the source code
% for the parts of the runtime libraries of Erlang/OTP used as well as
% that of the covered work.
-module(osmo_util).
-author('Harald Welte <laforge@gnumonks.org>').
-export([digit_list2int/1, int2digit_list/1]).
-export([reload_config/0]).
-export([tuple_walk/3, tuple_walk_print_cb/3]).
-export([make_prim/4, make_prim/3]).
-export([pointcode2int/1, pointcode2int/2, pointcode_fmt/2]).
-export([asn_val/1]).
-include("osmo_util.hrl").
-compile({parse_transform, exprecs}).
-export_records([primitive]).
% Convert a list of digits to an integer value
digit_list2int(Int, []) ->
Int;
digit_list2int(Int, [Digit|Tail]) ->
digit_list2int(Int*10 + Digit, Tail).
digit_list2int(Digits) when is_list(Digits) ->
digit_list2int(0, Digits).
% Convert an integer value into a list of decimal digits
int2digit_list(0, Digits) when is_list(Digits) ->
Digits;
int2digit_list(Int, Digits) when is_integer(Int), is_list(Digits) ->
Digit = Int rem 10,
int2digit_list(Int div 10, [Digit|Digits]).
int2digit_list(Int) when is_integer(Int) ->
int2digit_list(Int, []).
% reload configuration of an application
reload_config() ->
case init:get_argument(config) of
{ok, [ Files ]} ->
ConfFiles = [begin
S = filename:basename(F,".config"),
filename:join(filename:dirname(F),
S ++ ".config")
end || F <- Files],
% Move sys.config to the head of the list
Config = lists:sort(fun("sys.config", _) -> true;
(_, _) -> false end, ConfFiles),
OldEnv = application_controller:prep_config_change(),
Apps = [{application, A, make_appl(A)}
|| {A,_,_} <- application:which_applications()],
application_controller:change_application_data(Apps, Config),
application_controller:config_change(OldEnv);
_ ->
{ok, []}
end.
make_appl(App) when is_atom(App) ->
AppList = element(2,application:get_all_key(App)),
FullName = code:where_is_file(atom_to_list(App) ++ ".app"),
case file:consult(FullName) of
{ok, [{application, _, Opts}]} ->
Env = proplists:get_value(env, Opts, []),
lists:keyreplace(env, 1, AppList, {env, Env});
{error, _Reason} ->
lists:keyreplace(env, 1, AppList, {env, []})
end.
% Walk a named tuple and (recursively) all its fields, call user-supplied
% callback for each of them
tuple_walk(Tpl, TupleCb, Args) when is_tuple(Tpl), is_function(TupleCb),
is_list(Args) ->
tuple_walk([], Tpl, TupleCb, Args).
tuple_walk(Path, Tpl, TupleCb, Args) when is_list(Path), is_tuple(Tpl),
is_list(Args) ->
% call Callback
NewTpl = TupleCb(Path, Tpl, Args),
[TplName|TplList] = tuple_to_list(NewTpl),
NewTplList = tuple_fieldlist_walk(Path, TplName, TplList, TupleCb, Args),
list_to_tuple([TplName|NewTplList]);
tuple_walk(Path, TplL, TupleCb, Args) when is_list(Path), is_list(TplL),
is_list(Args) ->
tuple_walk_list(Path, TplL, TupleCb, Args, []).
tuple_walk_list(_Path, [], _TupleCb, _Args, OutList) ->
OutList;
tuple_walk_list(Path, [Head|Tail], TupleCb, Args, OutList) ->
if
is_tuple(Head) ->
NewHead = tuple_walk(Path, Head, TupleCb, Args);
is_list(Head) ->
NewHead = tuple_walk(Path, Head, TupleCb, Args);
true ->
NewHead = Head
end,
tuple_walk_list(Path, Tail, TupleCb, Args, OutList++[NewHead]).
tuple_fieldlist_walk(Path, TplName, FieldList, TupleCb, Args) ->
tuple_fieldlist_walk(Path, TplName, FieldList, TupleCb, Args, []).
tuple_fieldlist_walk(_Path, _TplName, [], _TplCb, _Args, OutList) ->
OutList;
tuple_fieldlist_walk(Path, TplName, [Head|List], TupleCb, Args, OutList) ->
if
is_tuple(Head) ->
NewHead = tuple_walk(Path++[TplName], Head, TupleCb, Args);
is_list(Head) ->
NewHead = tuple_walk(Path++[TplName], Head, TupleCb, Args);
true ->
NewHead = Head
end,
tuple_fieldlist_walk(Path, TplName, List, TupleCb, Args, OutList++[NewHead]).
tuple_walk_print_cb(Path, Tpl, _Args) when is_list(Path), is_tuple(Tpl) ->
io:format("~p:~p~n", [Path, Tpl]),
Tpl.
% helper function to create a #primitive record
make_prim(Subsys, GenName, SpecName) ->
make_prim(Subsys, GenName, SpecName, []).
make_prim(Subsys, GenName, SpecName, Param) ->
#primitive{subsystem = Subsys, gen_name = GenName,
spec_name = SpecName, parameters = Param}.
% parse a 3-tuple pointcode into a raw integer
pointcode2int(Int) when is_integer(Int) ->
Int;
pointcode2int(undefined) ->
undefined;
pointcode2int(#pointcode{repr=Type, value=Value}) ->
pointcode2int(Type, Value);
pointcode2int({Std, Param}) ->
pointcode2int(Std, Param).
pointcode2int(itu, {A, B, C}) ->
<<PcInt:14/big>> = <<A:3, B:8, C:3>>,
PcInt;
pointcode2int(ansi, {A, B, C}) ->
<<PcInt:24/big>> = <<A:8, B:8, C:8>>,
PcInt;
pointcode2int(ttc, {A, B, C}) ->
<<PcInt:16/big>> = <<A:5, B:4, C:7>>,
PcInt.
% format a point-code into a 3-tuple according to the standard used
pointcode_fmt(Std, P) when is_binary(P) ->
<<PcInt/integer>> = P,
pointcode_fmt(Std, PcInt);
pointcode_fmt(itu, PcInt) when is_integer(PcInt) ->
<<A:3, B:8, C:3>> = <<PcInt:14/big>>,
{pointcode, itu, {A, B, C}};
pointcode_fmt(ansi, PcInt) ->
<<A:8, B:8, C:8>> = <<PcInt:24/big>>,
{pointcode, ansi, {A, B, C}};
pointcode_fmt(ttc, PcInt) ->
<<A:5, B:4, C:7>> = <<PcInt:16/big>>,
{pointcode, ttc, {A, B, C}}.
asn_val(undefined) ->
asn1_NOVALUE;
asn_val([]) ->
asn1_NOVALUE;
asn_val(Foo) ->
Foo.
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