%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2008-2017. 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(dict_test_lib).
-export([new/2]).
new(Mod, Eq) ->
fun (enter, {K,V,D}) -> enter(Mod, K, V, D);
(empty, []) -> empty(Mod);
(equal, {D1,D2}) -> Eq(D1, D2);
(from_list, L) -> from_list(Mod, L);
(module, []) -> Mod;
(size, D) -> Mod:size(D);
(is_empty, D) -> Mod:is_empty(D);
(iterator, S) -> Mod:iterator(S);
(iterator_from, {Start, S}) -> Mod:iterator_from(Start, S);
(next, I) -> Mod:next(I);
(to_list, D) -> to_list(Mod, D);
(erase, {K,D}) -> erase(Mod, K, D);
(take, {K,D}) -> take(Mod, K, D)
end.
empty(Mod) ->
case erlang:function_exported(Mod, new, 0) of
false -> Mod:empty();
true -> Mod:new()
end.
to_list(Mod, D) ->
Mod:to_list(D).
from_list(Mod, L) ->
case erlang:function_exported(Mod, from_orddict, 1) of
false ->
Mod:from_list(L);
true ->
%% The gb_trees module has no from_list/1 function.
%%
%% The keys in S are not unique. To make sure
%% that we pick the same key/value pairs as
%% dict/orddict, first convert the list to an orddict.
Orddict = orddict:from_list(L),
Mod:from_orddict(Orddict)
end.
%% Store new value into dictionary or update previous value in dictionary.
enter(Mod, Key, Val, Dict) ->
case erlang:function_exported(Mod, store, 3) of
false ->
Mod:enter(Key, Val, Dict);
true ->
Mod:store(Key, Val, Dict)
end.
erase(Mod, Key, Val) when Mod =:= dict; Mod =:= orddict ->
Mod:erase(Key, Val);
erase(gb_trees, Key, Val) ->
gb_trees:delete_any(Key, Val).
take(gb_trees, Key, Val) ->
Res = try
gb_trees:take(Key, Val)
catch
error:_ ->
error
end,
Res = gb_trees:take_any(Key, Val);
take(Mod, Key, Val) ->
Mod:take(Key, Val).
