From: Haocheng Zhang <wqst@fb.com>
Date: Fri, 24 Jun 2016 19:34:59 +0000 (-0700)
Subject: fix bug for negative shift value
X-Git-Tag: 2016.07.26~116
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=7815372b49e1f22900aec37532825028890644a7;p=folly.git

fix bug for negative shift value

Reviewed By: luciang

Differential Revision: D3407128

fbshipit-source-id: 2c00387d6e068f9e052f539198ae2f985d265c74
---

diff --git a/folly/Hash.h b/folly/Hash.h
index dd61fb76..b0ae03bb 100644
--- a/folly/Hash.h
+++ b/folly/Hash.h
@@ -281,7 +281,7 @@ inline uint64_t fnv64(const std::string& str,
 
 inline uint32_t hsieh_hash32_buf(const void* buf, size_t len) {
   // forcing signed char, since other platforms can use unsigned
-  const signed char* s = reinterpret_cast<const signed char*>(buf);
+  const unsigned char* s = reinterpret_cast<const unsigned char*>(buf);
   uint32_t hash = static_cast<uint32_t>(len);
   uint32_t tmp;
   size_t rem;