taskoperators.java

nesC写的heed算法

// $Id: TASKOperators.java,v 1.1.2.1 2003/09/10 20:59:39 whong Exp $

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package net.tinyos.task.taskapi;

import net.tinyos.tinydb.SelOp;

/**
 * Class defining constants for TASK operator types
 */
public class TASKOperators
{
	public static final String OperName[] = {"=", ">", ">=", "<", "<=", "<>", "+", "-", "*", "/", "<<", ">>"};
	public static final int INVALID_OPER	= -1; // invalid operator
	public static final int EQ			= 0;	// equal operator.
	public static final int GT			= 1;	// greater than operator.
	public static final int GE			= 2;	// greater than or equal to.
	public static final int LT			= 3;	// less than operator.
	public static final int LE			= 4;	// less than or equal to.
	public static final int NE			= 5;	// not equal
	public static final int PLUS		= 6;	// addition
	public static final int MINUS		= 7;	// subtraction
	public static final int TIMES		= 8;	// multiplication
	public static final int DIV			= 9;	// division
	public static final int LSHIFT		= 10;	// left bit shift
	public static final int RSHIFT		= 11;	// right bit shift

	public static int opTypeFromSelOp(byte selOp)
	{
		switch (selOp)
		{
			case SelOp.OP_EQ:
				return EQ;
			case SelOp.OP_NEQ:
				return NE;
			case SelOp.OP_GT:
				return GT;
			case SelOp.OP_GE:
				return GE;
			case SelOp.OP_LT:
				return LT;
			case SelOp.OP_LE:
				return LE;
		}
		return INVALID_OPER;
	}
};