/*
* @(#)TimingTrace.java 1.3 95/08/22
*
* Copyright (c) 1995 Sun Microsystems, Inc. All Rights reserved Permission to
* use, copy, modify, and distribute this software and its documentation for
* NON-COMMERCIAL purposes and without fee is hereby granted provided that
* this copyright notice appears in all copies. Please refer to the file
* copyright.html for further important copyright and licensing information.
*
* SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
* SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
* IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
* OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY
* LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR
* ITS DERIVATIVES.
*/
package sun.net.www.httpd;
import java.io.*;
/**
* A class to maintain a trace of timing information through
* an execution path.
* @author James Gosling
*/
public class TimingTrace {
private long times[];
private String terms[];
private long t0;
private int ntimes;
String title;
public TimingTrace (String t, int size) {
times = new int[size];
terms = new String[size];
title = t;
reset();
}
public void reset() {
t0 = System.currentTimeMillis();
ntimes = 0;
}
public void stamp(String s) {
int n = ntimes;
if (n < terms.length) {
times[n] = System.currentTimeMillis();
terms[n] = s;
ntimes = n + 1;
}
}
static private void po(PrintStream s, int n, int width) {
if (n <= 0) {
while (--width >= 0)
s.write(' ');
} else {
po(s, n / 10, width - 1);
s.write('0' + n % 10);
}
}
static synchronized void print(PrintStream s, TimingTrace t) {
int lt = t.t0;
s.print("\nTiming title: " + t.title + "\n");
for (int i = 0; i < t.ntimes; i++) {
int T = t.times[i];
po(s, T - lt, 6);
po(s, T - t.t0, 6);
s.print(" ");
lt = T;
s.print(t.terms[i]);
s.print("\n");
}
}
public void print() {
print(System.out);
}
public void print(PrintStream s) {
print(s, this);
}
}