bits.java

华为模拟网关源码 华为模拟网关源码 华为模拟网关源码

package open_cmpp.util;

public class Bits {
	public static int getInt(byte[] b, int off) {
		return ((b[off + 3] & 0xFF) << 0) + ((b[off + 2] & 0xFF) << 8)
				+ ((b[off + 1] & 0xFF) << 16) + ((b[off + 0] & 0xFF) << 24);
	}

	public static short getShort(byte[] b, int off) {
		return (short) (((b[off + 1] & 0xFF) << 0) + ((b[off + 0] & 0xFF) << 8));
	}

	public static void putShort(byte[] b, int off, short val) {
		b[off + 1] = (byte) (val >>> 0);
		b[off + 0] = (byte) (val >>> 8);
	}

	public static void putInt(byte[] b, int off, int val) {
		b[off + 3] = (byte) (val >>> 0);
		b[off + 2] = (byte) (val >>> 8);
		b[off + 1] = (byte) (val >>> 16);
		b[off + 0] = (byte) (val >>> 24);
	}

	public static void putLong(byte[] b, int off, long val) {
		b[off + 7] = (byte) (val >>> 0);
		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 + 0] = (byte) (val >>> 56);
	}

	public static long getLong(byte[] b, int off) {
		return ((b[off + 7] & 0xFFL) << 0) + ((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) + ((b[off + 0] & 0xFFL) << 56);
	}
}