From: Michihiro NAKAJIMA <ggcueroad@gmail.com>
Date: Mon, 3 Dec 2012 03:51:29 +0000 (+0900)
Subject: Avoid arithmetic overflow warning(C6297) found by Visual studio
X-Git-Tag: v3.1.0~25
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a164ef53f2c38f331d2b4df8d7ff98693c4584a1;p=thirdparty%2Flibarchive.git

Avoid arithmetic overflow warning(C6297) found by Visual studio
static analysis.
---

diff --git a/libarchive/archive_ppmd7.c b/libarchive/archive_ppmd7.c
index 13a258188..fe0b0318c 100644
--- a/libarchive/archive_ppmd7.c
+++ b/libarchive/archive_ppmd7.c
@@ -990,7 +990,7 @@ static void RangeEnc_ShiftLow(CPpmd7z_RangeEnc *p)
     p->Cache = (Byte)((UInt32)p->Low >> 24);
   }
   p->CacheSize++;
-  p->Low = (UInt32)p->Low << 8;
+  p->Low = ((UInt32)p->Low << 8) & 0xFFFFFFFF;
 }
 
 static void RangeEnc_Encode(CPpmd7z_RangeEnc *p, UInt32 start, UInt32 size, UInt32 total)