Refactor code involving calls to get_fieldname_element/3

Refactor and clean up code. While at it, add error handling and
test cases. (Also add test cases for the existing values in
ValueTest.asn while we are it.)

Add support for defining INTEGER constants by extracting
fields from objects. Example:

  int-from-object INTEGER ::= object.&id

When extracting values from objects in constraints, only one
level of extraction would work. That is, the following would
work:

  SomeName ::= INTEGER (object.&int)

but not:

  SomeName ::= INTEGER (object.&obj.&int)

1 files changed, 47 insertions, 0 deletions

diff --git a/lib/asn1/test/testInfObjExtract.erl b/lib/asn1/test/testInfObjExtract.erl
new file mode 100644
index 0000000000..4e148824fe
--- /dev/null
+++ b/lib/asn1/test/testInfObjExtract.erl
@@ -0,0 +1,47 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2014. 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%
+%%
+%%
+
+-module(testInfObjExtract).
+
+-export([main/0]).
+
+main() ->
+    roundtrip('DataSeq-1', {'DataSeq-1',1,true}),
+    roundtrip('DataSeq-1', {'DataSeq-1',2,<<"abc">>}),
+    roundtrip('DataSeq-1', {'DataSeq-1',3,<<42:5>>}),
+    roundtrip_error('DataSeq-1', {'DataSeq-1',4,42}),
+
+    roundtrip('DataSeq-2', {'DataSeq-2',1,true}),
+    roundtrip_error('DataSeq-2', {'DataSeq',2,<<"abc">>}),
+    roundtrip_error('DataSeq-2', {'DataSeq',3,<<42:5>>}),
+    roundtrip_error('DataSeq-2', {'DataSeq',999,42}),
+    ok.
+
+roundtrip(T, V) ->
+    asn1_test_lib:roundtrip('InfObjExtract', T, V).
+
+roundtrip_error(T, V) ->
+    try asn1_test_lib:roundtrip('InfObjExtract', T, V) of
+	ok ->
+	    test_server:fail()
+    catch
+	_:_ ->
+	    ok
+    end.