mappedfloatfilebuffer.java

来自「纯java操作系统jnode,安装简单和操作简单的个人使用的Java操作系统」· Java 代码 · 共 263 行

/* MappedFloatFileBuffer.java -- 
   Copyright (C) 2002 Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU Classpath is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING.  If not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA.

Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.

As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under
terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
module.  An independent module is a module which is not derived from
or based on this library.  If you modify this library, you may extend
this exception to your version of the library, but you are not
obligated to do so.  If you do not wish to do so, delete this
exception statement from your version. */

package gnu.java.nio;
import java.nio.*;
import java.io.IOException;
final public class MappedFloatFileBuffer extends FloatBuffer {
	public long address;
	boolean ro;
	boolean direct;
	public FileChannelImpl ch;
	public MappedFloatFileBuffer(FileChannelImpl ch) {
		this.ch = ch;
		address = ch.address;
		try {
			long si = ch.size() / 4;
			limit((int) si);
		} catch (IOException e) {
			System.err.println("failed to get size of file-channel's file");
		}
	}
	public MappedFloatFileBuffer(MappedFloatFileBuffer b) {
		this.ro = b.ro;
		this.ch = b.ch;
		address = b.address;
		limit(b.limit());
	}
	public boolean isReadOnly() {
		return ro;
	}
	final public float get() {
		float a = MappedByteFileBuffer.nio_read_Float_file_channel(ch, position(), limit(), address);
		position(position() + 4);
		return a;
	}
	final public FloatBuffer put(float b) {
		MappedByteFileBuffer.nio_write_Float_file_channel(ch, position(), limit(), b, address);
		position(position() + 4);
		return this;
	}
	final public float get(int index) {
		float a = MappedByteFileBuffer.nio_read_Float_file_channel(ch, index, limit(), address);
		return a;
	}
	final public FloatBuffer put(int index, float b) {
		MappedByteFileBuffer.nio_write_Float_file_channel(ch, index, limit(), b, address);
		return this;
	}
	final public FloatBuffer compact() {
		return this;
	}
	final public boolean isDirect() {
		return direct;
	}
	final public FloatBuffer slice() {
		MappedFloatFileBuffer A = new MappedFloatFileBuffer(this);
		return A;
	}
	public FloatBuffer duplicate() {
		return new MappedFloatFileBuffer(this);
	}
	public FloatBuffer asReadOnlyBuffer() {
		MappedFloatFileBuffer b = new MappedFloatFileBuffer(this);
		b.ro = true;
		return b;
	}
	final public ByteBuffer asByteBuffer() {
		ByteBuffer res = new MappedByteFileBuffer(ch);
		res.limit((limit() * 4) / 1);
		return res;
	}
	final public byte getByte() {
		byte a = MappedByteFileBuffer.nio_read_Byte_file_channel(ch, position(), limit(), address);
		position(position() + 4);
		return a;
	}
	final public FloatBuffer putByte(byte value) {
		MappedByteFileBuffer.nio_write_Byte_file_channel(ch, position(), limit(), value, address);
		position(position() + 4);
		return this;
	}
	final public byte getByte(int index) {
		byte a = MappedByteFileBuffer.nio_read_Byte_file_channel(ch, index, limit(), address);
		return a;
	}
	final public FloatBuffer putByte(int index, byte value) {
		MappedByteFileBuffer.nio_write_Byte_file_channel(ch, index, limit(), value, address);
		return this;
	}
	final public CharBuffer asCharBuffer() {
		CharBuffer res = new MappedCharFileBuffer(ch);
		res.limit((limit() * 4) / 2);
		return res;
	}
	final public char getChar() {
		char a = MappedByteFileBuffer.nio_read_Char_file_channel(ch, position(), limit(), address);
		position(position() + 4);
		return a;
	}
	final public FloatBuffer putChar(char value) {
		MappedByteFileBuffer.nio_write_Char_file_channel(ch, position(), limit(), value, address);
		position(position() + 4);
		return this;
	}
	final public char getChar(int index) {
		char a = MappedByteFileBuffer.nio_read_Char_file_channel(ch, index, limit(), address);
		return a;
	}
	final public FloatBuffer putChar(int index, char value) {
		MappedByteFileBuffer.nio_write_Char_file_channel(ch, index, limit(), value, address);
		return this;
	}
	final public ShortBuffer asShortBuffer() {
		ShortBuffer res = new MappedShortFileBuffer(ch);
		res.limit((limit() * 4) / 2);
		return res;
	}
	final public short getShort() {
		short a = MappedByteFileBuffer.nio_read_Short_file_channel(ch, position(), limit(), address);
		position(position() + 4);
		return a;
	}
	final public FloatBuffer putShort(short value) {
		MappedByteFileBuffer.nio_write_Short_file_channel(ch, position(), limit(), value, address);
		position(position() + 4);
		return this;
	}
	final public short getShort(int index) {
		short a = MappedByteFileBuffer.nio_read_Short_file_channel(ch, index, limit(), address);
		return a;
	}
	final public FloatBuffer putShort(int index, short value) {
		MappedByteFileBuffer.nio_write_Short_file_channel(ch, index, limit(), value, address);
		return this;
	}
	final public IntBuffer asIntBuffer() {
		IntBuffer res = new MappedIntFileBuffer(ch);
		res.limit((limit() * 4) / 4);
		return res;
	}
	final public int getInt() {
		int a = MappedByteFileBuffer.nio_read_Int_file_channel(ch, position(), limit(), address);
		position(position() + 4);
		return a;
	}
	final public FloatBuffer putInt(int value) {
		MappedByteFileBuffer.nio_write_Int_file_channel(ch, position(), limit(), value, address);
		position(position() + 4);
		return this;
	}
	final public int getInt(int index) {
		int a = MappedByteFileBuffer.nio_read_Int_file_channel(ch, index, limit(), address);
		return a;
	}
	final public FloatBuffer putInt(int index, int value) {
		MappedByteFileBuffer.nio_write_Int_file_channel(ch, index, limit(), value, address);
		return this;
	}
	final public LongBuffer asLongBuffer() {
		LongBuffer res = new MappedLongFileBuffer(ch);
		res.limit((limit() * 4) / 8);
		return res;
	}
	final public long getLong() {
		long a = MappedByteFileBuffer.nio_read_Long_file_channel(ch, position(), limit(), address);
		position(position() + 4);
		return a;
	}
	final public FloatBuffer putLong(long value) {
		MappedByteFileBuffer.nio_write_Long_file_channel(ch, position(), limit(), value, address);
		position(position() + 4);
		return this;
	}
	final public long getLong(int index) {
		long a = MappedByteFileBuffer.nio_read_Long_file_channel(ch, index, limit(), address);
		return a;
	}
	final public FloatBuffer putLong(int index, long value) {
		MappedByteFileBuffer.nio_write_Long_file_channel(ch, index, limit(), value, address);
		return this;
	}
	final public FloatBuffer asFloatBuffer() {
		FloatBuffer res = new MappedFloatFileBuffer(ch);
		res.limit((limit() * 4) / 4);
		return res;
	}
	final public float getFloat() {
		float a = MappedByteFileBuffer.nio_read_Float_file_channel(ch, position(), limit(), address);
		position(position() + 4);
		return a;
	}
	final public FloatBuffer putFloat(float value) {
		MappedByteFileBuffer.nio_write_Float_file_channel(ch, position(), limit(), value, address);
		position(position() + 4);
		return this;
	}
	final public float getFloat(int index) {
		float a = MappedByteFileBuffer.nio_read_Float_file_channel(ch, index, limit(), address);
		return a;
	}
	final public FloatBuffer putFloat(int index, float value) {
		MappedByteFileBuffer.nio_write_Float_file_channel(ch, index, limit(), value, address);
		return this;
	}
	final public DoubleBuffer asDoubleBuffer() {
		DoubleBuffer res = new MappedDoubleFileBuffer(ch);
		res.limit((limit() * 4) / 8);
		return res;
	}
	final public double getDouble() {
		double a = MappedByteFileBuffer.nio_read_Double_file_channel(ch, position(), limit(), address);
		position(position() + 4);
		return a;
	}
	final public FloatBuffer putDouble(double value) {
		MappedByteFileBuffer.nio_write_Double_file_channel(ch, position(), limit(), value, address);
		position(position() + 4);
		return this;
	}
	final public double getDouble(int index) {
		double a = MappedByteFileBuffer.nio_read_Double_file_channel(ch, index, limit(), address);
		return a;
	}
	final public FloatBuffer putDouble(int index, double value) {
		MappedByteFileBuffer.nio_write_Double_file_channel(ch, index, limit(), value, address);
		return this;
	}
}