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// Copyright (c) 2003-present, Jodd Team (http://jodd.org)
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
package jodd.util;
/**
* Part a copy of java.io.Bits, which is for unknown reason package local.
* Utility methods for packing/unpacking primitive values in/out of byte arrays
* using big-endian byte ordering.
*/
public class Bits {
public static boolean getBoolean(final byte[] b, final int off) {
return b[off] != 0;
}
public static char getChar(final byte[] b, final int off) {
return (char) (((b[off + 1] & 0xFF)) +
((b[off]) << 8));
}
public static short getShort(final byte[] b, final int off) {
return (short) (((b[off + 1] & 0xFF)) +
((b[off]) << 8));
}
public static int getInt(final byte[] b, final int off) {
return ((b[off + 3] & 0xFF)) +
((b[off + 2] & 0xFF) << 8) +
((b[off + 1] & 0xFF) << 16) +
((b[off]) << 24);
}
public static float getFloat(final byte[] b, final int off) {
int i = getInt(b, off);
return Float.intBitsToFloat(i);
}
public static long getLong(final byte[] b, final int off) {
return ((b[off + 7] & 0xFFL)) +
((b[off + 6] & 0xFFL) << 8) +
((b[off + 5] & 0xFFL) << 16) +
((b[off + 4] & 0xFFL) << 24) +
((b[off + 3] & 0xFFL) << 32) +
((b[off + 2] & 0xFFL) << 40) +
((b[off + 1] & 0xFFL) << 48) +
(((long) b[off]) << 56);
}
public static double getDouble(final byte[] b, final int off) {
long j = getLong(b, off);
return Double.longBitsToDouble(j);
}
public static void putBoolean(final byte[] b, final int off, final boolean val) {
b[off] = (byte) (val ? 1 : 0);
}
public static void putChar(final byte[] b, final int off, final char val) {
b[off + 1] = (byte) (val);
b[off] = (byte) (val >>> 8);
}
public static void putShort(final byte[] b, final int off, final short val) {
b[off + 1] = (byte) (val);
b[off] = (byte) (val >>> 8);
}
public static void putInt(final byte[] b, final int off, final int val) {
b[off + 3] = (byte) (val);
b[off + 2] = (byte) (val >>> 8);
b[off + 1] = (byte) (val >>> 16);
b[off] = (byte) (val >>> 24);
}
public static void putFloat(final byte[] b, final int off, final float val) {
int i = Float.floatToIntBits(val);
putInt(b, off, i);
}
public static void putLong(final byte[] b, final int off, final long val) {
b[off + 7] = (byte) (val);
b[off + 6] = (byte) (val >>> 8);
b[off + 5] = (byte) (val >>> 16);
b[off + 4] = (byte) (val >>> 24);
b[off + 3] = (byte) (val >>> 32);
b[off + 2] = (byte) (val >>> 40);
b[off + 1] = (byte) (val >>> 48);
b[off] = (byte) (val >>> 56);
}
public static void putDouble(final byte[] b, final int off, final double val) {
long j = Double.doubleToLongBits(val);
putLong(b, off, j);
}
// ---------------------------------------------------------------- mask
public static boolean isSet(final byte value, final byte mask) {
return (value & mask) == mask;
}
public static boolean isSet(final int value, final int mask) {
return (value & mask) == mask;
}
public static boolean notSet(final int value, final int mask) {
return (value & mask) != mask;
}
/**
* Returns value with the bit corresponding to the mask set
* (if setBit is true) or cleared (if setBit is false).
*/
public static int set(final int value, final int mask, final boolean setBit) {
return setBit ? value | mask : value & ~mask;
}
/**
* Returns value with the bit corresponding to the mask set
* (if setBit is true) or cleared (if setBit is false).
*/
public static byte set(final byte value, final byte mask, final boolean setBit) {
return (byte) (setBit ? value | mask : value & ~mask);
}
}
