From c67f700fa91c75b88c358670e762147b15eab2cc Mon Sep 17 00:00:00 2001
From: payonel <payonel@hotmail.com>
Date: Sun, 3 Feb 2019 19:51:38 -0800
Subject: [PATCH] use ByteBuffer to deal with transferFrom transferFrom giving
 us grief on some platforms (openjdk for arch and debian) ByteBuffer appears
 to be more reliable

closes #3038
closes #3031
---
 src/main/scala/li/cil/oc/server/fs/Buffered.scala | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/src/main/scala/li/cil/oc/server/fs/Buffered.scala b/src/main/scala/li/cil/oc/server/fs/Buffered.scala
index b7040227a..bafbc7201 100644
--- a/src/main/scala/li/cil/oc/server/fs/Buffered.scala
+++ b/src/main/scala/li/cil/oc/server/fs/Buffered.scala
@@ -2,6 +2,7 @@ package li.cil.oc.server.fs
 
 import java.io
 import java.io.FileNotFoundException
+import java.nio.ByteBuffer
 import java.util.concurrent.CancellationException
 import java.util.concurrent.Future
 import java.util.concurrent.TimeUnit
@@ -131,7 +132,19 @@ trait Buffered extends OutputStreamFileSystem {
             childFile.createNewFile()
             val out = new io.FileOutputStream(childFile).getChannel
             val in = openInputChannel(childPath).get
-            out.transferFrom(in, 0, Long.MaxValue)
+
+            val buffer = ByteBuffer.allocateDirect(16 * 1024)
+            while (in.read(buffer) != -1) {
+              buffer.flip()
+              out.write(buffer)
+              buffer.compact()
+            }
+
+            buffer.flip()
+            while (buffer.hasRemaining) {
+              out.write(buffer)
+            }
+
             out.close()
             in.close()
             childFile.setLastModified(time)