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view graal/com.oracle.max.base/src/com/sun/max/lang/Endianness.java @ 4231:d713eaf4d288
Renaming
author | Christian Wimmer <Christian.Wimmer@Oracle.com> |
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date | Thu, 05 Jan 2012 16:09:47 -0800 |
parents | bc8527f3071c |
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/* * Copyright (c) 2007, 2011, 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 * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code 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 * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.sun.max.lang; import java.io.*; import java.nio.*; /** * Enumerated type with values for the most common more ways to arrange bits, bytes, etc. */ public enum Endianness { LITTLE { @Override public short readShort(InputStream stream) throws IOException { final int low = readByte(stream) & 0xff; final int high = readByte(stream); return (short) ((high << 8) | low); } @Override public int readInt(InputStream stream) throws IOException { final int low = readShort(stream) & 0xffff; final int high = readShort(stream); return (high << 16) | low; } @Override public long readLong(InputStream stream) throws IOException { final long low = readInt(stream) & 0xffffffffL; final long high = readInt(stream); return (high << 32) | low; } @Override public void writeShort(OutputStream stream, short value) throws IOException { short v = value; stream.write(v & 0xff); v >>= 8; stream.write(v & 0xff); } @Override public void writeInt(OutputStream stream, int value) throws IOException { int v = value; stream.write(v & 0xff); v >>= 8; stream.write(v & 0xff); v >>= 8; stream.write(v & 0xff); v >>= 8; stream.write(v & 0xff); } @Override public void writeLong(OutputStream stream, long value) throws IOException { long v = value; stream.write((int) v & 0xff); v >>= 8; stream.write((int) v & 0xff); v >>= 8; stream.write((int) v & 0xff); v >>= 8; stream.write((int) v & 0xff); v >>= 8; stream.write((int) v & 0xff); v >>= 8; stream.write((int) v & 0xff); v >>= 8; stream.write((int) v & 0xff); v >>= 8; stream.write((int) v & 0xff); } @Override public byte[] toBytes(short value) { short v = value; final byte[] bytes = new byte[2]; bytes[0] = (byte) (v & 0xff); v >>= 8; bytes[1] = (byte) (v & 0xff); return bytes; } @Override public byte[] toBytes(int value) { int v = value; final byte[] bytes = new byte[4]; bytes[0] = (byte) (v & 0xff); v >>= 8; bytes[1] = (byte) (v & 0xff); v >>= 8; bytes[2] = (byte) (v & 0xff); v >>= 8; bytes[3] = (byte) (v & 0xff); return bytes; } @Override public byte[] toBytes(long value) { long v = value; final byte[] bytes = new byte[8]; bytes[0] = (byte) (v & 0xff); v >>= 8; bytes[1] = (byte) (v & 0xff); v >>= 8; bytes[2] = (byte) (v & 0xff); v >>= 8; bytes[3] = (byte) (v & 0xff); v >>= 8; bytes[4] = (byte) (v & 0xff); v >>= 8; bytes[5] = (byte) (v & 0xff); v >>= 8; bytes[6] = (byte) (v & 0xff); v >>= 8; bytes[7] = (byte) (v & 0xff); return bytes; } @Override public void toBytes(short value, byte[] result, int offset) { short v = value; for (int i = 0; i < Shorts.SIZE && i < result.length; i++) { result[i + offset] = (byte) (v & 0xff); v >>= 8; } } @Override public void toBytes(int value, byte[] result, int offset) { int v = value; for (int i = 0; i < Ints.SIZE && i < result.length; i++) { result[i + offset] = (byte) (v & 0xff); v >>= 8; } } @Override public void toBytes(long value, byte[] result, int offset) { long v = value; for (int i = 0; i < Longs.SIZE && i < result.length; i++) { result[i + offset] = (byte) (v & 0xff); v >>= 8; } } @Override public int offsetWithinWord(WordWidth wordWidth, WordWidth dataWidth) { return 0; } @Override public ByteOrder asByteOrder() { return ByteOrder.LITTLE_ENDIAN; } }, BIG { @Override public short readShort(InputStream stream) throws IOException { final int high = readByte(stream); final int low = readByte(stream) & 0xff; return (short) ((high << 8) | low); } @Override public int readInt(InputStream stream) throws IOException { final int high = readShort(stream); final int low = readShort(stream) & 0xffff; return (high << 16) | low; } @Override public long readLong(InputStream stream) throws IOException { final long high = readInt(stream); final long low = readInt(stream) & 0xffffffffL; return (high << 32) | low; } @Override public void writeShort(OutputStream stream, short value) throws IOException { stream.write((value >> 8) & 0xff); stream.write(value & 0xff); } @Override public void writeInt(OutputStream stream, int value) throws IOException { stream.write((value >> 24) & 0xff); stream.write((value >> 16) & 0xff); stream.write((value >> 8) & 0xff); stream.write(value & 0xff); } @Override public void writeLong(OutputStream stream, long value) throws IOException { stream.write((int) (value >> 56) & 0xff); stream.write((int) (value >> 48) & 0xff); stream.write((int) (value >> 40) & 0xff); stream.write((int) (value >> 32) & 0xff); stream.write((int) (value >> 24) & 0xff); stream.write((int) (value >> 16) & 0xff); stream.write((int) (value >> 8) & 0xff); stream.write((int) value & 0xff); } @Override public byte[] toBytes(short value) { short v = value; final byte[] bytes = new byte[2]; bytes[1] = (byte) (v & 0xff); v >>= 8; bytes[0] = (byte) (v & 0xff); return bytes; } @Override public byte[] toBytes(int value) { int v = value; final byte[] bytes = new byte[4]; bytes[3] = (byte) (v & 0xff); v >>= 8; bytes[2] = (byte) (v & 0xff); v >>= 8; bytes[1] = (byte) (v & 0xff); v >>= 8; bytes[0] = (byte) (v & 0xff); return bytes; } @Override public byte[] toBytes(long value) { long v = value; final byte[] bytes = new byte[8]; bytes[7] = (byte) (v & 0xff); v >>= 8; bytes[6] = (byte) (v & 0xff); v >>= 8; bytes[5] = (byte) (v & 0xff); v >>= 8; bytes[4] = (byte) (v & 0xff); v >>= 8; bytes[3] = (byte) (v & 0xff); v >>= 8; bytes[2] = (byte) (v & 0xff); v >>= 8; bytes[1] = (byte) (v & 0xff); v >>= 8; bytes[0] = (byte) (v & 0xff); return bytes; } @Override public void toBytes(short value, byte[] result, int offset) { short v = value; int toIndex = offset + Shorts.SIZE - 1; for (int i = 1; i <= Shorts.SIZE && i <= result.length; i++) { result[toIndex--] = (byte) (v & 0xff); v >>= 8; } } @Override public void toBytes(int value, byte[] result, int offset) { int v = value; int toIndex = offset + Ints.SIZE - 1; for (int i = 1; i <= Ints.SIZE && i <= result.length; i++) { result[toIndex--] = (byte) (v & 0xff); v >>= 8; } } @Override public void toBytes(long value, byte[] result, int offset) { long v = value; int toIndex = offset + Longs.SIZE - 1; for (int i = 1; i <= Longs.SIZE && i <= result.length; i++) { result[toIndex--] = (byte) (v & 0xff); v >>= 8; } } @Override public int offsetWithinWord(WordWidth wordWidth, WordWidth dataWidth) { assert wordWidth.numberOfBytes >= dataWidth.numberOfBytes; return wordWidth.numberOfBytes - dataWidth.numberOfBytes; } @Override public ByteOrder asByteOrder() { return ByteOrder.BIG_ENDIAN; } }; @Override public String toString() { return name().toLowerCase(); } public byte readByte(InputStream stream) throws IOException { final int result = stream.read(); if (result < 0) { throw new IOException(); } return (byte) result; } public abstract short readShort(InputStream stream) throws IOException; public abstract int readInt(InputStream stream) throws IOException; public abstract long readLong(InputStream stream) throws IOException; public abstract void writeShort(OutputStream stream, short value) throws IOException; public abstract void writeInt(OutputStream stream, int value) throws IOException; public abstract void writeLong(OutputStream stream, long value) throws IOException; public byte[] toBytes(byte value) { final byte[] bytes = new byte[1]; bytes[0] = value; return bytes; } public abstract byte[] toBytes(short value); public abstract byte[] toBytes(int value); public abstract byte[] toBytes(long value); public abstract void toBytes(short value, byte[] result, int offset); public abstract void toBytes(int value, byte[] result, int offset); public abstract void toBytes(long value, byte[] result, int offset); public abstract int offsetWithinWord(WordWidth wordWith, WordWidth dataWidth); public abstract ByteOrder asByteOrder(); }