From 2f9afa14695063d5e15366c5d213b7abd9df1b72 Mon Sep 17 00:00:00 2001
From: Martin Sumner <martin.sumner@adaptip.co.uk>
Date: Tue, 26 Sep 2017 16:32:59 +0100
Subject: [PATCH] Add support for performing a magic hash on a binary

Ignore unnecessray term_to_binary if already binary.  This will be useful when we use magic_hash in tictac_trees we wish to be exportable.
---
 src/leveled_codec.erl | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/leveled_codec.erl b/src/leveled_codec.erl
index 9ed2a2c..1f6d6cc 100644
--- a/src/leveled_codec.erl
+++ b/src/leveled_codec.erl
@@ -87,10 +87,12 @@ magic_hash({?RIAK_TAG, Bucket, Key, _SubKey}) ->
     magic_hash({Bucket, Key});
 magic_hash({?STD_TAG, Bucket, Key, _SubKey}) ->
     magic_hash({Bucket, Key});
+magic_hash({binary, BinaryKey}) ->
+    H = 5381,
+    hash1(H, BinaryKey) band 16#FFFFFFFF;
 magic_hash(AnyKey) ->
     BK = term_to_binary(AnyKey),
-    H = 5381,
-    hash1(H, BK) band 16#FFFFFFFF.
+    magic_hash({binary, BK}).
 
 hash1(H, <<>>) -> 
     H;