/modules/mod_base/filters/filter_max.erl

 1%% @author Marc Worrell <marc@worrell.nl>
 2%% @copyright 2010 Marc Worrell
 3%% @doc Take maximum value.
 4
 5%% Copyright 2010 Marc Worrell
 6%%
 7%% Licensed under the Apache License, Version 2.0 (the "License");
 8%% you may not use this file except in compliance with the License.
 9%% You may obtain a copy of the License at
10%% 
11%%     http://www.apache.org/licenses/LICENSE-2.0
12%% 
13%% Unless required by applicable law or agreed to in writing, software
14%% distributed under the License is distributed on an "AS IS" BASIS,
15%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16%% See the License for the specific language governing permissions and
17%% limitations under the License.
18
19-module(filter_max).
20-export([max/3]).
21
22max(undefined, _Arg, _Context) ->
23    undefined;
24max(Value, undefined, _Context) ->
25    Value;
26max(Value, Arg, _Context) ->
27    case Value > Arg of
28        true -> Value;
29        false -> Arg
30    end.
31
32