jpayne@68: package shared;
jpayne@68: 
jpayne@68: import java.io.PrintStream;
jpayne@68: import java.util.Locale;
jpayne@68: 
jpayne@68: public class Timer {
jpayne@68: 	
jpayne@68: 	public Timer(){this(System.err, true);}
jpayne@68: 	
jpayne@68: 	public Timer(String s){
jpayne@68: 		this(System.err, true);
jpayne@68: 		if(outstream!=null){outstream.println(s);}
jpayne@68: 	}
jpayne@68: 	
jpayne@68: 	public Timer(PrintStream outstream_, boolean addTab_){
jpayne@68: 		outstream=outstream_;
jpayne@68: 		addTab=addTab_;
jpayne@68: 		start();
jpayne@68: 	}
jpayne@68: 	
jpayne@68: 	public long start(String s){
jpayne@68: 		if(outstream!=null){outstream.println(s);}
jpayne@68: 		return start();
jpayne@68: 	}
jpayne@68: 	
jpayne@68: 	public long stopAndPrint(){
jpayne@68: 		long x=stop();
jpayne@68: 		if(outstream!=null){outstream.println(this);}
jpayne@68: 		return x;
jpayne@68: 	}
jpayne@68: 	
jpayne@68: 	public long stop(String s){
jpayne@68: 		long x=stop();
jpayne@68: 		if(addTab && s!=null && !s.endsWith("\t")){s=s+"\t";}
jpayne@68: 		if(outstream!=null){outstream.println(s+this);}
jpayne@68: 		return x;
jpayne@68: 	}
jpayne@68: 	
jpayne@68: 	public long start(){
jpayne@68: 		time1=time2=System.nanoTime();
jpayne@68: 		elapsed=0;
jpayne@68: 		return time1;
jpayne@68: 	}
jpayne@68: 	
jpayne@68: 	public long stop(){
jpayne@68: 		time2=System.nanoTime();
jpayne@68: 		elapsed=time2-time1;
jpayne@68: 		return time2;
jpayne@68: 	}
jpayne@68: 	
jpayne@68: 	@Override
jpayne@68: 	public String toString(){
jpayne@68: 		return timeInSeconds(3)+" seconds.";
jpayne@68: 	}
jpayne@68: 	
jpayne@68: 	public String timeInSeconds(int decimals) {
jpayne@68: 		return String.format(Locale.ROOT, "%."+decimals+"f", timeInSeconds());
jpayne@68: 	}
jpayne@68: 	
jpayne@68: 	public double timeInSeconds() {
jpayne@68: 		return elapsed/1000000000d;
jpayne@68: 	}
jpayne@68: 
jpayne@68: 	public long time1;
jpayne@68: 	public long time2;
jpayne@68: 	/** in nanos */
jpayne@68: 	public long elapsed;
jpayne@68: 	
jpayne@68: 	public PrintStream outstream=System.err;
jpayne@68: 	public boolean addTab=true;
jpayne@68: }