387 lines
11 KiB
Java
387 lines
11 KiB
Java
/*
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* Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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// -- This file was mechanically generated: Do not edit! -- //
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// Android-note: This file is generated by ojluni/src/tools/gensrc_android.sh.
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package java.nio;
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import java.util.Objects;
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import libcore.io.Memory;
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class ByteBufferAsIntBuffer // package-private
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extends IntBuffer
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{
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protected final ByteBuffer bb;
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// Android-added: Added offset as address can be zero on Android.
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/**
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* The offset from the Bytebuffer at the position 0 (in addition to bb.offset) in the
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* number of bytes.
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*/
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protected final int byteOffset;
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// Android-added: Merge with little- and big-endian classes.
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private final ByteOrder order;
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// Android-changed: Added ByteOrder and removed MemorySegmentProxy to be supported yet.
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ByteBufferAsIntBuffer(ByteBuffer bb,
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int mark, int pos, int lim, int cap,
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int off, ByteOrder order)
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{
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// Android-removed: Android duplicates the buffer, and merges with the read-only buffer.
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// super(mark, pos, lim, cap, segment);
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// this.bb = bb;
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// address = addr;
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// assert address >= bb.address;
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super(mark, pos, lim, cap);
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this.bb = bb.duplicate();
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this.isReadOnly = bb.isReadOnly;
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// There are only two possibilities for the type of ByteBuffer "bb", viz, DirectByteBuffer and
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// HeapByteBuffer. We only have to initialize the field when bb is an instance of
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// DirectByteBuffer.
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// The address field is used by NIOAccess#getBasePointer and GetDirectBufferAddress method
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// in art which return the address of the first usable byte of the underlying memory, i.e,
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// the position of parent buffer. Therefore, value of "off" will be equal to parent buffer's
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// position when the method is called from either HeapByteBuffer or DirectByteBuffer.
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if (bb instanceof DirectByteBuffer) {
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this.address = bb.address + off;
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}
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this.bb.order(order);
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this.order = order;
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byteOffset = off;
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}
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@Override
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Object base() {
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// Android-changed: DirectByteBuffer allocated directly assigns both hb and address field.
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// return bb.hb;
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return bb.base();
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}
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@Override
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public IntBuffer slice() {
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int pos = this.position();
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int lim = this.limit();
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int rem = (pos <= lim ? lim - pos : 0);
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// Android-changed: Added ByteOrder and removed MemorySegmentProxy to be supported yet.
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// long addr = byteOffset(pos);
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// return new ByteBufferAsIntBuffer(bb, -1, 0, rem, rem, addr, order);
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return new ByteBufferAsIntBuffer(bb, -1, 0, rem, rem, ix(pos), order);
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}
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@Override
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public IntBuffer slice(int index, int length) {
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Objects.checkFromIndexSize(index, length, limit());
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return new ByteBufferAsIntBuffer(bb,
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-1,
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0,
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length,
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length,
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// Android-changed: Added ByteOrder and removed MemorySegmentProxy to be supported yet.
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ix(index), order);
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}
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@Override
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public IntBuffer duplicate() {
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return new ByteBufferAsIntBuffer(bb,
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this.markValue(),
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this.position(),
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this.limit(),
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this.capacity(),
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// Android-changed: Added ByteOrder and removed MemorySegmentProxy to be supported yet.
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byteOffset, order);
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}
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@Override
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public IntBuffer asReadOnlyBuffer() {
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return new ByteBufferAsIntBuffer(bb.asReadOnlyBuffer(),
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this.markValue(),
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this.position(),
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this.limit(),
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this.capacity(),
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// Android-changed: Added ByteOrder and removed MemorySegmentProxy to be supported yet.
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byteOffset, order);
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}
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private int ix(int i) {
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// Android-changed: address can be zero on Android.
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// int off = (int) (address - bb.address);
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// return (i << 2) + off;
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return (i << 2) + byteOffset;
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}
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// Android-removed: Removed unused byteOffset(long).
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/*
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protected long byteOffset(long i) {
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return (i << 2) + address;
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}
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*/
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@Override
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public int get() {
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// Android-changed: Removed MemorySegmentProxy to be supported yet.
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// int x = SCOPED_MEMORY_ACCESS.getIntUnaligned(scope(), bb.hb, byteOffset(nextGetIndex()),
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// false);
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// return (x);
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return get(nextGetIndex());
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}
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@Override
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public int get(int i) {
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// Android-changed: Removed MemorySegmentProxy to be supported yet.
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// int x = SCOPED_MEMORY_ACCESS.getIntUnaligned(scope(), bb.hb, byteOffset(checkIndex(i)),
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// false);
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// return (x);
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return bb.getIntUnchecked(ix(checkIndex(i)));
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}
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// BEGIN Android-added: Improve the efficiency of get().
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@Override
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public IntBuffer get(int[] dst, int off, int length) {
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Objects.checkFromIndexSize(off, length, dst.length);
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if (length > remaining())
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throw new BufferUnderflowException();
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bb.getUnchecked(ix(position), dst, off, length);
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position += length;
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return this;
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}
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@Override
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public IntBuffer get(int index, int[] dst, int off, int length) {
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Objects.checkFromIndexSize(index, length, limit());
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Objects.checkFromIndexSize(off, length, dst.length);
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bb.getUnchecked(ix(index), dst, off, length);
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return this;
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}
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// END Android-added: Improve the efficiency of get().
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@Override
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public IntBuffer put(int x) {
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// Android-added: Merge the Read-only buffer class with this Read-Write buffer class.
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throwIfReadOnly();
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// Android-changed: Removed MemorySegmentProxy to be supported yet.
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// int y = (x);
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// SCOPED_MEMORY_ACCESS.putIntUnaligned(scope(), bb.hb, byteOffset(nextPutIndex()), y,
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// false);
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put(nextPutIndex(), x);
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return this;
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}
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@Override
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public IntBuffer put(int i, int x) {
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// Android-added: Merge the Read-only buffer class with this Read-Write buffer class.
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throwIfReadOnly();
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// Android-changed: Removed MemorySegmentProxy to be supported yet.
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// int y = (x);
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// SCOPED_MEMORY_ACCESS.putIntUnaligned(scope(), bb.hb, byteOffset(checkIndex(i)), y,
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// false);
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bb.putIntUnchecked(ix(checkIndex(i)), x);
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return this;
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}
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// BEGIN Android-added: Improve the efficiency of put(type$[]).
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@Override
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public IntBuffer put(int[] src, int off, int length) {
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throwIfReadOnly();
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Objects.checkFromIndexSize(off, length, src.length);
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if (length > remaining())
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throw new BufferOverflowException();
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bb.putUnchecked(ix(position), src, off, length);
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position += length;
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return this;
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}
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@Override
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public IntBuffer put(int index, int[] src, int off, int length) {
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throwIfReadOnly();
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Objects.checkFromIndexSize(index, length, limit());
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Objects.checkFromIndexSize(off, length, src.length);
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putUnchecked(index, src, off, length);
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return this;
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}
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private void putUnchecked(int index, int[] src, int off, int length) {
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bb.putUnchecked(ix(index), src, off, length);
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}
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@Override
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void putBuffer(int pos, IntBuffer src, int srcPos, int n) {
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if (src.hb != null) {
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// this and src don't share the same backed char[].
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putUnchecked(pos, src.hb, srcPos + src.offset, n);
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return;
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}
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if (order() == src.order() &&
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src instanceof ByteBufferAsIntBuffer asSrc) { // always true if src.hb == null
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this.bb.putBuffer(ix(pos), asSrc.bb, asSrc.ix(srcPos), n << 2);
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return;
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}
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// Fallback to the slow path until memmove with bswap is implemented
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super.putBuffer(pos, src, srcPos, n);
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}
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// END Android-added: Improve the efficiency of put(type$[]).
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@Override
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public IntBuffer compact() {
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// Android-added: Merge the Read-only buffer class with this Read-Write buffer class.
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throwIfReadOnly();
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int pos = position();
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int lim = limit();
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int rem = (pos <= lim ? lim - pos : 0);
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// Android-changed: Improve the efficiency.
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/*
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ByteBuffer db = bb.duplicate();
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db.limit(ix(lim));
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db.position(ix(0));
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ByteBuffer sb = db.slice();
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sb.position(pos << 2);
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sb.compact();
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*/
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if (!(bb instanceof DirectByteBuffer)) {
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System.arraycopy(bb.array(), ix(pos), bb.array(), ix(0), rem << 2);
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} else {
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// Use pos << 2 instead of ix(pos) to avoid double counting of the offset
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// because this.address == bb.address + offset;
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Memory.memmove(this, 0, this, pos << 2, rem << 2);
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}
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position(rem);
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limit(capacity());
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discardMark();
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return this;
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}
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@Override
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public boolean isDirect() {
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return bb.isDirect();
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}
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@Override
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public boolean isReadOnly() {
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return isReadOnly;
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}
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@Override
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public ByteOrder order() {
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return order;
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}
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// Android-added: Merge the Read-only buffer class with this Read-Write buffer class.
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private void throwIfReadOnly() {
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if (isReadOnly) {
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throw new ReadOnlyBufferException();
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}
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}
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}
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