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6341887: java.util.zip: Add ByteBuffer methods to Inflater/Deflater

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Reviewed-by: alanb
This commit is contained in:
David M Lloyd 2018-04-19 10:33:35 -07:00 • committed by Xueming Shen
parent 9303a8a180
commit 883d41fefc
7 changed files with 1378 additions and 341 deletions
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23
src/java.base/share/classes/java/util/zip/ZipUtils.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2013, 2017, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2013, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -25,6 +25,8 @@
package java.util.zip;
import java.nio.Buffer;
import java.nio.ByteBuffer;
import java.nio.file.attribute.FileTime;
import java.security.AccessController;
import java.security.PrivilegedAction;
@ -37,6 +39,9 @@ import java.util.concurrent.TimeUnit;
import static java.util.zip.ZipConstants.ENDHDR;
import jdk.internal.misc.Unsafe;
import sun.nio.ch.DirectBuffer;
class ZipUtils {
// used to adjust values between Windows and java epoch
@ -45,6 +50,9 @@ class ZipUtils {
// used to indicate the corresponding windows time is not available
public static final long WINDOWS_TIME_NOT_AVAILABLE = Long.MIN_VALUE;
// static final ByteBuffer defaultBuf = ByteBuffer.allocateDirect(0);
static final ByteBuffer defaultBuf = ByteBuffer.allocate(0);
/**
* Converts Windows time (in microseconds, UTC/GMT) time to FileTime.
*/
@ -281,4 +289,17 @@ class ZipUtils {
AccessController.doPrivileged(pa);
}
}
private static final Unsafe unsafe = Unsafe.getUnsafe();
private static final long byteBufferArrayOffset = unsafe.objectFieldOffset(ByteBuffer.class, "hb");
private static final long byteBufferOffsetOffset = unsafe.objectFieldOffset(ByteBuffer.class, "offset");
static byte[] getBufferArray(ByteBuffer byteBuffer) {
return (byte[]) unsafe.getObject(byteBuffer, byteBufferArrayOffset);
}
static int getBufferOffset(ByteBuffer byteBuffer) {
return unsafe.getInt(byteBuffer, byteBufferOffsetOffset);
}
}