%%
    Copyright 2012   , 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
%%
%%       -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.
%%
%% @doc
%%   Naive XOR folding
-module(hash_fold).

-export([fold32/1]).

fold32(Data) ->
   fold32(Data, 0).

fold32(<<H:32, T/binary>>, Hash) ->
   fold32(T, Hash bxor H);
fold32(<<H:24>>, Hash) ->
   Hash bxor H;
fold32(<<H:16>>, Hash) ->
   Hash bxor H;
fold32(<<H:8>>, Hash) ->
   Hash bxor H;
fold32(<<>>, Hash) ->
   Hash.



   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       -2.0

   Unless required by applicable law or agreed to in writing, software
   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.

 @doc
   Naive XOR folding
    Copyright 2012   , All Rights Reserved
    Licensed under the Apache License , Version 2.0 ( the " License " ) ;
    distributed under the License is distributed on an " AS IS " BASIS ,
-module(hash_fold).

-export([fold32/1]).

fold32(Data) ->
   fold32(Data, 0).

fold32(<<H:32, T/binary>>, Hash) ->
   fold32(T, Hash bxor H);
fold32(<<H:24>>, Hash) ->
   Hash bxor H;
fold32(<<H:16>>, Hash) ->
   Hash bxor H;
fold32(<<H:8>>, Hash) ->
   Hash bxor H;
fold32(<<>>, Hash) ->
   Hash.
