From 4ac4412534ca9cb1ec77bfdcd37055fc6c88ca83 Mon Sep 17 00:00:00 2001
From: Peter Lemenkov <lemenkov@gmail.com>
Date: Sun, 17 Jun 2012 00:01:34 +0400
Subject: [PATCH 2/2] Rewrote Erlang NIF API routines under MIT license

Signed-off-by: Peter Lemenkov <lemenkov@gmail.com>
---
 src/skerl.erl |   58 +++++++++++++++++++++++++++++++++++----------------------
 1 file changed, 36 insertions(+), 22 deletions(-)

diff --git a/src/skerl.erl b/src/skerl.erl
index 1b0d639..ea1572a 100644
--- a/src/skerl.erl
+++ b/src/skerl.erl
@@ -1,18 +1,38 @@
+%% -------------------------------------------------------------------
+%%
+%% Copyright (c) 2012 Peter Lemenkov.
+%%
+%% The MIT License
+%%
+%% Permission is hereby granted, free of charge, to any person obtaining a copy
+%% of this software and associated documentation files (the "Software"), to deal
+%% in the Software without restriction, including without limitation the rights
+%% to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+%% copies of the Software, and to permit persons to whom the Software is
+%% furnished to do so, subject to the following conditions:
+%%
+%% The above copyright notice and this permission notice shall be included in
+%% all copies or substantial portions of the Software.
+%%
+%% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+%% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+%% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+%% AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+%% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+%% OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+%% THE SOFTWARE.
+%%
+%% -------------------------------------------------------------------
+
 -module(skerl).
--author('b@fastip.com').
 
--export([init/0,
-         init/1,
-         update/2,
-         final/1,
-         hash/2,
-         hexhash/2]).
+% Erlang NIF API
+-export([init/0]).
 
--on_load(init/0).
+% Skein hash API
+-export([final/1, hash/2, hexhash/2, init/1, update/2]).
 
--ifdef(TEST).
--include_lib("eunit/include/eunit.hrl").
--endif.
+-on_load(init/0).
 
 init() ->
     case code:priv_dir(skerl) of
@@ -24,23 +44,17 @@ init() ->
     erlang:load_nif(SoName, 0).
 
 init(_Bits) ->
-    "NIF library not loaded".
+    exit("NIF library not loaded").
 
 update(_State, _Data) ->
-    "NIF library not loaded".
+    exit("NIF library not loaded").
 
 final(_State) ->
-    "NIF library not loaded".
-    
+    exit("NIF library not loaded").
+
 hexhash(Bits, Data) ->
   {ok, Hash} = hash(Bits, Data),
   list_to_binary(hex:bin_to_hexstr(Hash)).
 
--spec hash(non_neg_integer(), binary()) -> {ok, binary()} | {error, atom()}.
 hash(_Bits, _Data) ->
-    case random:uniform(999999999999) of
-        666 -> {error, fail};
-        667 -> {error, bad_hashlen};
-        668 -> {ok, <<4242/integer>>};
-        _ -> exit("NIF library not loaded")
-    end.
+    exit("NIF library not loaded").
-- 
1.7.10.2