%% -*- erlang -*-
%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1998-2011. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
%%
%% %CopyrightEnd%
%%

%% Run like:
%%   $ERL_TOP/bin/escript erts/emulator/utils/loaded

-mode(compile).

main(_) ->
    LibDir = code:lib_dir(),
    io:format("Library root is ~s\n", [LibDir]),
    Wc = filename:join(LibDir, "*/ebin/*.beam"),
    Beams = filelib:wildcard(Wc),
    BeamFileSize = lists:sum([filelib:file_size(Beam) || Beam <- Beams]),
    io:format("~w BEAM files containing ~w bytes\n",
	      [length(Beams),BeamFileSize]),
    Ms = [list_to_atom(filename:rootname(filename:basename(Beam))) ||
	     Beam <- Beams],
    [{module,_} = code:ensure_loaded(M) || M <- Ms],
    <<"Current code: ",T/binary>> = erlang:system_info(loaded),
    Digits = grab_digits(T),
    io:format("~w modules comprising ~s words when loaded\n",
	      [length(Ms),Digits]).

grab_digits(<<H,T/binary>>) when $0 =< H, H =< $9 ->
    [H|grab_digits(T)];
grab_digits(<<$\n,_/binary>>) -> [].