From 2462429eb70e7d88d13a6346dd7dfd66997854a4 Mon Sep 17 00:00:00 2001
From: jfrijters <jfrijters>
Date: Fri, 19 Aug 2011 09:09:50 +0000
Subject: [PATCH] Implemented positional read/write.

---
 openjdk/sun/nio/ch/IOUtil.java | 33 +++++++++++++++++++++++++++++++--
 1 file changed, 31 insertions(+), 2 deletions(-)

diff --git a/openjdk/sun/nio/ch/IOUtil.java b/openjdk/sun/nio/ch/IOUtil.java
index fe5caaef..45b9b704 100644
--- a/openjdk/sun/nio/ch/IOUtil.java
+++ b/openjdk/sun/nio/ch/IOUtil.java
@@ -73,8 +73,23 @@ class IOUtil {
     {
         if (dst.isReadOnly())
             throw new IllegalArgumentException("Read-only buffer");
+
         if (position != -1)
-            throw new ikvm.internal.NotYetImplementedError();
+        {
+            synchronized (lock)
+            {
+                long prevpos = fd.getFilePointer();
+                try
+                {
+                    fd.seek(position);
+                    return read(fd, dst, -1, nd, null);
+                }
+                finally
+                {
+                    fd.seek(prevpos);
+                }
+            }
+        }
 
         if (dst.hasArray())
         {
@@ -109,7 +124,21 @@ class IOUtil {
         throws IOException
     {
         if (position != -1)
-            throw new ikvm.internal.NotYetImplementedError();
+        {
+            synchronized (lock)
+            {
+                long prevpos = fd.getFilePointer();
+                try
+                {
+                    fd.seek(position);
+                    return write(fd, src, -1, nd, null);
+                }
+                finally
+                {
+                    fd.seek(prevpos);
+                }
+            }
+        }
 
         if (src.hasArray())
         {