portstatus.java

来自「纯java操作系统jnode,安装简单和操作简单的个人使用的Java操作系统」· Java 代码 · 共 57 行

/*
 * $Id: PortStatus.java,v 1.1 2003/11/25 11:42:24 epr Exp $
 */
package org.jnode.driver.usb.hub;

import org.jnode.driver.usb.USBPacket;
import org.jnode.util.NumberUtils;

/**
 * @author Ewout Prangsma ([e-mail])
 */
public class PortStatus extends USBPacket {

	/**
	 * Initialize this instance
	 */
	public PortStatus() {
		super(4);
	}
	
	/**
	 * Gets the wPortStatus field.
	 */
	public int getPortStatus() {
		return getShort(0);
	}
	
	/**
	 * Are specific bits of the port status set.
	 * @param mask
	 * @return True if all of the mask bits have been set, false otherwise.
	 */
	public boolean getPortStatusBits(int mask) {
		return ((getShort(0) & mask) == mask);
	}
	
	/**
	 * Gets the wPortChange field.
	 */
	public int getPortChange() {
		return getShort(2);
	}
	
	/**
	 * Are specific bits of the port change set.
	 * @param mask
	 * @return True if all of the mask bits have been set, false otherwise.
	 */
	public boolean getPortChangeBits(int mask) {
		return ((getShort(2) & mask) == mask);
	}
	
	public String toString() {
		return "ST:" + NumberUtils.hex(getPortStatus(), 4) + ", CH:" + NumberUtils.hex(getPortChange(), 4);
	}
}