From 2ed54bdc32aa766cb8c84b65053bea9cd73a98ab Mon Sep 17 00:00:00 2001
From: Daniel Kirchner <daniel@ekpyron.org>
Date: Tue, 7 Aug 2018 17:21:52 +0200
Subject: [PATCH] Add explicit conversions from bytes32 to uint256 to allow
 binary operations.

---
 src/strings.sol | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/strings.sol b/src/strings.sol
index b449645a..83e7cb60 100644
--- a/src/strings.sol
+++ b/src/strings.sol
@@ -83,23 +83,23 @@ library strings {
         uint ret;
         if (self == 0)
             return 0;
-        if (self & 0xffffffffffffffffffffffffffffffff == 0) {
+        if (uint256(self) & 0xffffffffffffffffffffffffffffffff == 0) {
             ret += 16;
             self = bytes32(uint(self) / 0x100000000000000000000000000000000);
         }
-        if (self & 0xffffffffffffffff == 0) {
+        if (uint256(self) & 0xffffffffffffffff == 0) {
             ret += 8;
             self = bytes32(uint(self) / 0x10000000000000000);
         }
-        if (self & 0xffffffff == 0) {
+        if (uint256(self) & 0xffffffff == 0) {
             ret += 4;
             self = bytes32(uint(self) / 0x100000000);
         }
-        if (self & 0xffff == 0) {
+        if (uint256(self) & 0xffff == 0) {
             ret += 2;
             self = bytes32(uint(self) / 0x10000);
         }
-        if (self & 0xff == 0) {
+        if (uint256(self) & 0xff == 0) {
             ret += 1;
         }
         return 32 - ret;