[Boost-commit] svn:boost r82218 - trunk/boost/functional/hash/detail

Subject: [Boost-commit] svn:boost r82218 - trunk/boost/functional/hash/detail
From: thom.heller_at_[hidden]
Date: 2012-12-27 05:49:20

Author: theller
Date: 2012-12-27 05:49:19 EST (Thu, 27 Dec 2012)
New Revision: 82218
URL: http://svn.boost.org/trac/boost/changeset/82218

Log:
Fixing UB by using memcpy instead of old style cast

Text files modified: 
   trunk/boost/functional/hash/detail/hash_float.hpp |     4 +++-                                    
   1 files changed, 3 insertions(+), 1 deletions(-)

Modified: trunk/boost/functional/hash/detail/hash_float.hpp
==============================================================================
--- trunk/boost/functional/hash/detail/hash_float.hpp	(original)
+++ trunk/boost/functional/hash/detail/hash_float.hpp	2012-12-27 05:49:19 EST (Thu, 27 Dec 2012)
@@ -73,7 +73,9 @@
                 ptr += sizeof(std::size_t);
 
                 while(length >= sizeof(std::size_t)) {
-                    hash_float_combine(seed, *(std::size_t*) ptr);
+                    std::size_t buffer = 0;
+                    std::memcpy(&buffer, ptr, sizeof(std::size_t));
+                    hash_float_combine(seed, buffer);
                     length -= sizeof(std::size_t);
                     ptr += sizeof(std::size_t);
                 }