From da18671166e096dc375da5c547c3be38de0493fb Mon Sep 17 00:00:00 2001
From: Lioncash <mathew1800@gmail.com>
Date: Sun, 17 Aug 2014 14:23:54 -0400
Subject: [PATCH] Core: Fix undefined behavior in mem_map_funcs' WriteBlock
 function

---
 src/core/mem_map_funcs.cpp | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/core/mem_map_funcs.cpp b/src/core/mem_map_funcs.cpp
index 5772cca523..ecdaa06d79 100644
--- a/src/core/mem_map_funcs.cpp
+++ b/src/core/mem_map_funcs.cpp
@@ -289,11 +289,15 @@ void Write64(const u32 addr, const u64 data) {
 
 void WriteBlock(const u32 addr, const u8* data, const int size) {
     int offset = 0;
-    while (offset < (size & ~3))
-        Write32(addr + offset, *(u32*)&data[offset += 4]);
+    while (offset < (size & ~3)) {
+        Write32(addr + offset, *(u32*)&data[offset]);
+        offset += 4;
+    }
 
-    if (size & 2)
-        Write16(addr + offset, *(u16*)&data[offset += 2]);
+    if (size & 2) {
+        Write16(addr + offset, *(u16*)&data[offset]);
+        offset += 2;
+    }
 
     if (size & 1)
         Write8(addr + offset, data[offset]);