1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/rt/emul/compact/src/main/java/java/io/Bits.java Tue Feb 26 16:54:16 2013 +0100
1.3 @@ -0,0 +1,123 @@
1.4 +/*
1.5 + * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation. Oracle designates this
1.11 + * particular file as subject to the "Classpath" exception as provided
1.12 + * by Oracle in the LICENSE file that accompanied this code.
1.13 + *
1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 + * version 2 for more details (a copy is included in the LICENSE file that
1.18 + * accompanied this code).
1.19 + *
1.20 + * You should have received a copy of the GNU General Public License version
1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 + *
1.24 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.25 + * or visit www.oracle.com if you need additional information or have any
1.26 + * questions.
1.27 + */
1.28 +
1.29 +package java.io;
1.30 +
1.31 +/**
1.32 + * Utility methods for packing/unpacking primitive values in/out of byte arrays
1.33 + * using big-endian byte ordering.
1.34 + */
1.35 +class Bits {
1.36 +
1.37 + /*
1.38 + * Methods for unpacking primitive values from byte arrays starting at
1.39 + * given offsets.
1.40 + */
1.41 +
1.42 + static boolean getBoolean(byte[] b, int off) {
1.43 + return b[off] != 0;
1.44 + }
1.45 +
1.46 + static char getChar(byte[] b, int off) {
1.47 + return (char) ((b[off + 1] & 0xFF) +
1.48 + (b[off] << 8));
1.49 + }
1.50 +
1.51 + static short getShort(byte[] b, int off) {
1.52 + return (short) ((b[off + 1] & 0xFF) +
1.53 + (b[off] << 8));
1.54 + }
1.55 +
1.56 + static int getInt(byte[] b, int off) {
1.57 + return ((b[off + 3] & 0xFF) ) +
1.58 + ((b[off + 2] & 0xFF) << 8) +
1.59 + ((b[off + 1] & 0xFF) << 16) +
1.60 + ((b[off ] ) << 24);
1.61 + }
1.62 +
1.63 + static float getFloat(byte[] b, int off) {
1.64 + return Float.intBitsToFloat(getInt(b, off));
1.65 + }
1.66 +
1.67 + static long getLong(byte[] b, int off) {
1.68 + return ((b[off + 7] & 0xFFL) ) +
1.69 + ((b[off + 6] & 0xFFL) << 8) +
1.70 + ((b[off + 5] & 0xFFL) << 16) +
1.71 + ((b[off + 4] & 0xFFL) << 24) +
1.72 + ((b[off + 3] & 0xFFL) << 32) +
1.73 + ((b[off + 2] & 0xFFL) << 40) +
1.74 + ((b[off + 1] & 0xFFL) << 48) +
1.75 + (((long) b[off]) << 56);
1.76 + }
1.77 +
1.78 + static double getDouble(byte[] b, int off) {
1.79 + return Double.longBitsToDouble(getLong(b, off));
1.80 + }
1.81 +
1.82 + /*
1.83 + * Methods for packing primitive values into byte arrays starting at given
1.84 + * offsets.
1.85 + */
1.86 +
1.87 + static void putBoolean(byte[] b, int off, boolean val) {
1.88 + b[off] = (byte) (val ? 1 : 0);
1.89 + }
1.90 +
1.91 + static void putChar(byte[] b, int off, char val) {
1.92 + b[off + 1] = (byte) (val );
1.93 + b[off ] = (byte) (val >>> 8);
1.94 + }
1.95 +
1.96 + static void putShort(byte[] b, int off, short val) {
1.97 + b[off + 1] = (byte) (val );
1.98 + b[off ] = (byte) (val >>> 8);
1.99 + }
1.100 +
1.101 + static void putInt(byte[] b, int off, int val) {
1.102 + b[off + 3] = (byte) (val );
1.103 + b[off + 2] = (byte) (val >>> 8);
1.104 + b[off + 1] = (byte) (val >>> 16);
1.105 + b[off ] = (byte) (val >>> 24);
1.106 + }
1.107 +
1.108 + static void putFloat(byte[] b, int off, float val) {
1.109 + putInt(b, off, Float.floatToIntBits(val));
1.110 + }
1.111 +
1.112 + static void putLong(byte[] b, int off, long val) {
1.113 + b[off + 7] = (byte) (val );
1.114 + b[off + 6] = (byte) (val >>> 8);
1.115 + b[off + 5] = (byte) (val >>> 16);
1.116 + b[off + 4] = (byte) (val >>> 24);
1.117 + b[off + 3] = (byte) (val >>> 32);
1.118 + b[off + 2] = (byte) (val >>> 40);
1.119 + b[off + 1] = (byte) (val >>> 48);
1.120 + b[off ] = (byte) (val >>> 56);
1.121 + }
1.122 +
1.123 + static void putDouble(byte[] b, int off, double val) {
1.124 + putLong(b, off, Double.doubleToLongBits(val));
1.125 + }
1.126 +}