// Copyright (c) 2003-2012, Jodd Team (jodd.org). All Rights Reserved.
package jodd.util;
/**
* A copy of <code>java.io.Bits</code>, 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(byte[] b, int off) {
return b[off] != 0;
}
public static char getChar(byte[] b, int off) {
return (char) (((b[off + 1] & 0xFF)) +
((b[off]) << 8));
}
public static short getShort(byte[] b, int off) {
return (short) (((b[off + 1] & 0xFF)) +
((b[off]) << 8));
}
public static int getInt(byte[] b, int off) {
return ((b[off + 3] & 0xFF)) +
((b[off + 2] & 0xFF) << 8) +
((b[off + 1] & 0xFF) << 16) +
((b[off]) << 24);
}
public static float getFloat(byte[] b, int off) {
int i = ((b[off + 3] & 0xFF)) +
((b[off + 2] & 0xFF) << 8) +
((b[off + 1] & 0xFF) << 16) +
((b[off]) << 24);
return Float.intBitsToFloat(i);
}
public static long getLong(byte[] b, 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(byte[] b, int off) {
long j = ((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);
return Double.longBitsToDouble(j);
}
public static void putBoolean(byte[] b, int off, boolean val) {
b[off] = (byte) (val ? 1 : 0);
}
public static void putChar(byte[] b, int off, char val) {
b[off + 1] = (byte) (val);
b[off] = (byte) (val >>> 8);
}
public static void putShort(byte[] b, int off, short val) {
b[off + 1] = (byte) (val);
b[off] = (byte) (val >>> 8);
}
public static void putInt(byte[] b, int off, 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(byte[] b, int off, float val) {
int i = Float.floatToIntBits(val);
b[off + 3] = (byte) (i);
b[off + 2] = (byte) (i >>> 8);
b[off + 1] = (byte) (i >>> 16);
b[off] = (byte) (i >>> 24);
}
public static void putLong(byte[] b, int off, 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(byte[] b, int off, double val) {
long j = Double.doubleToLongBits(val);
b[off + 7] = (byte) (j);
b[off + 6] = (byte) (j >>> 8);
b[off + 5] = (byte) (j >>> 16);
b[off + 4] = (byte) (j >>> 24);
b[off + 3] = (byte) (j >>> 32);
b[off + 2] = (byte) (j >>> 40);
b[off + 1] = (byte) (j >>> 48);
b[off] = (byte) (j >>> 56);
}
}
|