From: Steve Lhomme <slhomme@matroska.org>
Date: Fri, 16 Apr 2010 13:33:13 +0000 (+0000)
Subject: v1: add a safety check assert
X-Git-Tag: release-0.9.0~9
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=b7dbfcd78adc1ac8c38a2f8e3d64f6a67d74619b;p=libmatroska

v1: add a safety check assert

git-svn-id: https://matroska.svn.sourceforge.net/svnroot/matroska/trunk/libmatroska@128 a6f86f6d-0131-4f8e-9e7b-e335508773d5
---

diff --git a/src/KaxBlock.cpp b/src/KaxBlock.cpp
index 4f79494..be00985 100644
--- a/src/KaxBlock.cpp
+++ b/src/KaxBlock.cpp
@@ -283,8 +283,10 @@ filepos_t KaxBlockVirtual::UpdateSize(bool bSaveDefault, bool bForceRender)
 	binary *cursor = EbmlBinary::GetBuffer();
 	// fill data
 	if (TrackNumber < 0x80) {
+        assert(GetSize() >= 4);
 		*cursor++ = TrackNumber | 0x80; // set the first bit to 1 
 	} else {
+        assert(GetSize() >= 5);
 		*cursor++ = (TrackNumber >> 8) | 0x40; // set the second bit to 1
 		*cursor++ = TrackNumber & 0xFF;
 	}