%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2008-2016. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
%% You may obtain a copy of the License at
%%
%% http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%%
%% %CopyrightEnd%
%%
%%
-module(asn1_test_lib).
-export([compile/3,compile_all/3,compile_erlang/3,
hex_to_bin/1,
match_value/2,
parallel/0,
roundtrip/3,roundtrip/4,roundtrip_enc/3,roundtrip_enc/4]).
-include_lib("common_test/include/ct.hrl").
run_dialyzer() ->
false.
compile(File, Config, Options) -> compile_all([File], Config, Options).
compile_all(Files, Config, Options) ->
DataDir = ?config(data_dir, Config),
CaseDir = ?config(case_dir, Config),
[compile_file(filename:join(DataDir, F), [{outdir, CaseDir},
debug_info|Options])
|| F <- Files],
dialyze(Files, Options),
ok.
parallel() ->
case erlang:system_info(schedulers) > 1 andalso not run_dialyzer() of
true -> [parallel];
false -> []
end.
dialyze(Files, Options) ->
case not run_dialyzer() orelse lists:member(abs, Options) of
true -> ok;
false -> dialyze(Files)
end.
dialyze(Files) ->
Beams0 = [code:which(module(F)) || F <- Files],
Beams = [code:which(asn1rt_nif)|Beams0],
case dialyzer:run([{files,Beams},
{warnings,[]},
{get_warnings,true}]) of
[] ->
ok;
[_|_]=Ws ->
io:put_chars([[B,$\n] || B <- Beams]),
io:put_chars([dialyzer:format_warning(W) || W <- Ws]),
error(dialyzer_warnings)
end.
module(F0) ->
F1 = filename:basename(F0),
F2 = case filename:extension(F1) of
".asn" ->
filename:rootname(F1);
".asn1" ->
filename:rootname(F1);
".py" ->
filename:rootname(F1);
"" ->
F1
end,
F = case filename:extension(F2) of
".set" ->
filename:rootname(F2);
"" ->
F2
end,
list_to_atom(F).
%% filename:join(CaseDir, F ++ ".beam").
compile_file(File, Options) ->
try
ok = asn1ct:compile(File, [warnings_as_errors|Options])
catch
Class:Reason ->
ct:print("Failed to compile ~s\n", [File]),
erlang:error({compile_failed, {File, Options}, {Class, Reason}})
end.
compile_erlang(Mod, Config, Options) ->
DataDir = ?config(data_dir, Config),
CaseDir = ?config(case_dir, Config),
M = list_to_atom(Mod),
{ok, M} = compile:file(filename:join(DataDir, Mod),
[report,{i,CaseDir},{outdir,CaseDir}|Options]).
hex_to_bin(S) ->
<< <<(hex2num(C)):4>> || C <- S, C =/= $\s >>.
%% match_value(Pattern, Value) -> ok.
%% Match Pattern against Value. If the Pattern contains in any
%% position, the corresponding position in the Value can be
%% anything. Generate an exception if the Pattern and Value don't
%% match.
match_value('_', _) ->
ok;
match_value([H1|T1], [H2|T2]) ->
match_value(H1, H2),
match_value(T1, T2);
match_value(T1, T2) when tuple_size(T1) =:= tuple_size(T2) ->
match_value_tuple(1, T1, T2);
match_value(Same, Same) ->
ok;
match_value(V1, V2) ->
error({nomatch,V1,V2}).
roundtrip(Mod, Type, Value) ->
roundtrip(Mod, Type, Value, Value).
roundtrip(Mod, Type, Value, ExpectedValue) ->
{ok,Encoded} = Mod:encode(Type, Value),
{ok,ExpectedValue} = Mod:decode(Type, Encoded),
test_ber_indefinite(Mod, Type, Encoded, ExpectedValue),
ok.
roundtrip_enc(Mod, Type, Value) ->
roundtrip_enc(Mod, Type, Value, Value).
roundtrip_enc(Mod, Type, Value, ExpectedValue) ->
{ok,Encoded} = Mod:encode(Type, Value),
{ok,ExpectedValue} = Mod:decode(Type, Encoded),
test_ber_indefinite(Mod, Type, Encoded, ExpectedValue),
Encoded.
%%%
%%% Internal functions.
%%%
hex2num(C) when $0 =< C, C =< $9 -> C - $0;
hex2num(C) when $A =< C, C =< $F -> C - $A + 10;
hex2num(C) when $a =< C, C =< $f -> C - $a + 10.
match_value_tuple(I, T1, T2) when I =< tuple_size(T1) ->
match_value(element(I, T1), element(I, T2)),
match_value_tuple(I+1, T1, T2);
match_value_tuple(_, _, _) ->
ok.
test_ber_indefinite(Mod, Type, Encoded, ExpectedValue) ->
case Mod:encoding_rule() of
ber ->
Indefinite = iolist_to_binary(ber_indefinite(Encoded)),
{ok,ExpectedValue} = Mod:decode(Type, Indefinite);
_ ->
ok
end.
%% Rewrite all definite lengths for constructed values to an
%% indefinite length.
ber_indefinite(Bin0) ->
case ber_get_tag(Bin0) of
done ->
[];
primitive ->
Bin0;
{constructed,Tag,Bin1} ->
{Len,Bin2} = ber_get_len(Bin1),
<<Val0:Len/binary,Bin/binary>> = Bin2,
Val = iolist_to_binary(ber_indefinite(Val0)),
[<<Tag/binary,16#80,Val/binary,0,0>>|ber_indefinite(Bin)]
end.
ber_get_tag(<<>>) ->
done;
ber_get_tag(<<_:2,0:1,_:5,_/binary>>) ->
primitive;
ber_get_tag(<<_:2,1:1,_:5,_/binary>>=Bin0) ->
TagLen = ber_tag_length(Bin0),
<<Tag:TagLen/binary,Bin/binary>> = Bin0,
{constructed,Tag,Bin}.
ber_tag_length(<<_:3,2#11111:5,T/binary>>) ->
ber_tag_length_1(T, 1);
ber_tag_length(_) ->
1.
ber_tag_length_1(<<1:1,_:7,T/binary>>, N) ->
ber_tag_length_1(T, N+1);
ber_tag_length_1(<<0:1,_:7,_/binary>>, N) ->
N+1.
ber_get_len(<<0:1,L:7,T/binary>>) ->
{L,T};
ber_get_len(<<1:1,Octets:7,T0/binary>>) ->
<<L:Octets/unit:8,T/binary>> = T0,
{L,T}.
