Mercurial > hg4j

changeset 23:6f9aca1a97be

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Severe defect in buffer wrap on seek
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 06 Jan 2011 03:30:43 +0100
parents 603806cd2dc6
children d4fdd1845b3f
files src/com/tmate/hgkit/fs/DataAccessProvider.java
diffstat 1 files changed, 5 insertions(+), 2 deletions(-) [+]
line wrap: on
line diff
--- a/src/com/tmate/hgkit/fs/DataAccessProvider.java	Thu Jan 06 03:30:20 2011 +0100
+++ b/src/com/tmate/hgkit/fs/DataAccessProvider.java	Thu Jan 06 03:30:43 2011 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010 Artem Tikhomirov 
+ * Copyright (c) 2010, 2011 Artem Tikhomirov 
  */
 package com.tmate.hgkit.fs;
 
@@ -110,6 +110,9 @@
 		
 		@Override
 		public void seek(long offset) throws IOException {
+			if (offset > size) {
+				throw new IllegalArgumentException();
+			}
 			if (offset < bufferStartInFile + buffer.limit() && offset >= bufferStartInFile) {
 				buffer.position((int) (offset - bufferStartInFile));
 			} else {
@@ -130,7 +133,7 @@
 				buffer.position(newPos);
 			} else {
 				//
-				seek(fileChannel.position()+ bytes);
+				seek(bufferStartInFile + newPos);
 			}
 		}