TimeUnit.java

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// author: Jason Wolfe



package ros.communication;

public abstract class TimeUnit implements Cloneable {
        public int secs;
        public int nsecs;
        
        public long totalNsecs() { 
                return ((long) secs) * 1000000000 + nsecs;
        }
        
        public boolean isZero()     { return totalNsecs() == 0; }
        public boolean isPositive() { return totalNsecs() >  0; }
        public boolean isNegative() { return totalNsecs() <  0; }

        public void normalize() {
                while(nsecs < 0) {
                        nsecs += 1000000000;
                        secs -= 1;
                }
                while(nsecs >= 1000000000) {
                        nsecs -= 1000000000;
                        secs += 1;                      
                }
        }
        
        public TimeUnit clone() {
                try {
                        return (TimeUnit) super.clone();
                } catch (CloneNotSupportedException e) {
                        throw new RuntimeException("TimeUnit not cloneable?!");
                }
        }
}