27 lines
1 KiB
Diff
27 lines
1 KiB
Diff
|
Based on (hunk for changelog removed)
|
||
|
|
From b62c902dd258125cac86cd2df21fc898035a43d3 Mon Sep 17 00:00:00 2001
|
||
|
|
From: Michael Pruett <michael@68k.org>
|
||
|
|
Date: Mon, 29 Aug 2016 23:08:26 -0500
|
||
|
|
Subject: [PATCH] Fix undefined behavior in sign conversion.
|
||
|
|
|
||
|
|
|
||
|
|
---
|
||
|
|
ChangeLog | 5 +++++
|
||
|
|
libaudiofile/modules/SimpleModule.h | 3 ++-
|
||
|
|
2 files changed, 7 insertions(+), 1 deletion(-)
|
||
|
|
|
||
|
|
diff --git a/libaudiofile/modules/SimpleModule.h b/libaudiofile/modules/SimpleModule.h
|
||
|
|
index 03c6c69..bad85ad 100644
|
||
|
|
--- a/libaudiofile/modules/SimpleModule.h
|
||
|
|
+++ b/libaudiofile/modules/SimpleModule.h
|
||
|
|
@@ -123,7 +123,8 @@ struct signConverter
|
||
|
|
typedef typename IntTypes<Format>::UnsignedType UnsignedType;
|
||
|
|
|
||
|
|
static const int kScaleBits = (Format + 1) * CHAR_BIT - 1;
|
||
|
|
- static const int kMinSignedValue = -1 << kScaleBits;
|
||
|
|
+ static const int kMaxSignedValue = (((1 << (kScaleBits - 1)) - 1) << 1) + 1;
|
||
|
|
+ static const int kMinSignedValue = -kMaxSignedValue - 1;
|
||
|
|
|
||
|
|
struct signedToUnsigned : public std::unary_function<SignedType, UnsignedType>
|
||
|
|
{
|