From ea633a79bdaf4e1a00df26f5d4cdcf60e39247c1 Mon Sep 17 00:00:00 2001
From: Adam Tkac <atkac@redhat.com>
Date: Wed, 21 Jul 2010 14:12:18 +0000
Subject: [PATCH] [Bugfix] Extend encoding range checks to handle negative
 encodings well.

git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@4113 3789f03b-4d11-0410-bbf8-ca57d06f2519
---
 common/rfb/ConnParams.cxx | 2 +-
 common/rfb/Encoder.cxx    | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/common/rfb/ConnParams.cxx b/common/rfb/ConnParams.cxx
index 9bfc3027..3ee37087 100644
--- a/common/rfb/ConnParams.cxx
+++ b/common/rfb/ConnParams.cxx
@@ -129,7 +129,7 @@ void ConnParams::setEncodings(int nEncodings, const rdr::S32* encodings)
 	       encodings[i] <= pseudoEncodingQualityLevel9) {
       noJpeg = false;
       qualityLevel = encodings[i] - pseudoEncodingQualityLevel0;
-    } else if (encodings[i] <= encodingMax && Encoder::supported(encodings[i]))
+    } else if (Encoder::supported(encodings[i]))
       currentEncoding_ = encodings[i];
   }
 }
diff --git a/common/rfb/Encoder.cxx b/common/rfb/Encoder.cxx
index b0bd147e..5de75430 100644
--- a/common/rfb/Encoder.cxx
+++ b/common/rfb/Encoder.cxx
@@ -34,12 +34,12 @@ EncoderCreateFnType Encoder::createFns[encodingMax+1] = { 0 };
 
 bool Encoder::supported(int encoding)
 {
-  return encoding <= encodingMax && createFns[encoding];
+  return encoding >= 0 && encoding <= encodingMax && createFns[encoding];
 }
 
 Encoder* Encoder::createEncoder(int encoding, SMsgWriter* writer)
 {
-  if (encoding <= encodingMax && createFns[encoding])
+  if (supported(encoding))
     return (*createFns[encoding])(writer);
   return 0;
 }
-- 
2.39.5