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removed uuid library: without a random seed v4 UUIDs were coming up i…

…dentical; switching to avtobiff's erlang-uuid lib
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commit 04ac3ed80ea9022b1e745cfac9bca761304a9908 1 parent 627f80a
@kevinmontuori kevinmontuori authored
Showing with 0 additions and 59 deletions.
  1. +0 −59 src/lib/uuid.erl
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59 src/lib/uuid.erl
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-% Copyright (c) 2008, Travis Vachon
-% All rights reserved.
-%
-% Redistribution and use in source and binary forms, with or without
-% modification, are permitted provided that the following conditions are
-% met:
-%
-% * Redistributions of source code must retain the above copyright
-% notice, this list of conditions and the following disclaimer.
-%
-% * Redistributions in binary form must reproduce the above copyright
-% notice, this list of conditions and the following disclaimer in the
-% documentation and/or other materials provided with the distribution.
-%
-% * Neither the name of the author nor the names of its contributors
-% may be used to endorse or promote products derived from this
-% software without specific prior written permission.
-%
-% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-% "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-% LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-% A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-% OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-% SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
-% TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-% PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-% LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-% NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-% SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-%
--module(uuid).
--export([v4/0, to_string/1, get_parts/1, to_binary/1]).
--import(random).
-
-% Generates a random binary UUID.
-v4() ->
- v4(random:uniform(round(math:pow(2, 48))) - 1, random:uniform(round(math:pow(2, 12))) - 1, random:uniform(round(math:pow(2, 32))) - 1, random:uniform(round(math:pow(2, 30))) - 1).
-v4(R1, R2, R3, R4) ->
- <<R1:48, 4:4, R2:12, 2:2, R3:32, R4: 30>>.
-
-% Returns a string representation of a binary UUID.
-to_string(U) ->
- lists:flatten(io_lib:format("~8.16.0b-~4.16.0b-~4.16.0b-~2.16.0b~2.16.0b-~12.16.0b", get_parts(U))).
-
-% Returns the 32, 16, 16, 8, 8, 48 parts of a binary UUID.
-get_parts(<<TL:32, TM:16, THV:16, CSR:8, CSL:8, N:48>>) ->
- [TL, TM, THV, CSR, CSL, N].
-
-% Converts a UUID string in the format of 550e8400-e29b-41d4-a716-446655440000
-% (with or without the dashes) to binary.
-to_binary(U)->
- convert(lists:filter(fun(Elem) -> Elem /= $- end, U), []).
-
-% Converts a list of pairs of hex characters (00-ff) to bytes.
-convert([], Acc)->
- list_to_binary(lists:reverse(Acc));
-convert([X, Y | Tail], Acc)->
- {ok, [Byte], _} = io_lib:fread("~16u", [X, Y]),
- convert(Tail, [Byte | Acc]).
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