1 | /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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2 | * JFlex 1.4.3 *
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3 | * Copyright (C) 1998-2009 Gerwin Klein <[email protected]> *
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4 | * All rights reserved. *
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5 | * *
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6 | * This program is free software; you can redistribute it and/or modify *
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7 | * it under the terms of the GNU General Public License. See the file *
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8 | * COPYRIGHT for more information. *
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9 | * *
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10 | * This program is distributed in the hope that it will be useful, *
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11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of *
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12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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13 | * GNU General Public License for more details. *
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14 | * *
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15 | * You should have received a copy of the GNU General Public License along *
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16 | * with this program; if not, write to the Free Software Foundation, Inc., *
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17 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
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18 | * *
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19 | * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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20 | package JFlex;
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21 |
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22 | /**
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23 | * Very simple timer for code generation time statistics.
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24 | *
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25 | * Not very exact, measures user time, not processor time.
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26 | *
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27 | * @author Gerwin Klein
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28 | * @version JFlex 1.4.3, $Revision: 433 $, $Date: 2009-01-31 19:52:34 +1100 (Sat, 31 Jan 2009) $
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29 | */
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30 | public class Timer {
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31 |
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32 | /* the timer stores start and stop time from currentTimeMillis() */
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33 | private long startTime, stopTime;
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34 |
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35 | /* flag if the timer is running (if stop time is valid) */
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36 | private boolean running;
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37 |
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38 |
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39 | /**
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40 | * Construct a new timer that starts immediatly.
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41 | */
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42 | public Timer() {
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43 | startTime = System.currentTimeMillis();
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44 | running = true;
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45 | }
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46 |
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47 |
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48 | /**
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49 | * Start the timer. If it is already running, the old start
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50 | * time is lost.
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51 | */
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52 | public void start() {
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53 | startTime = System.currentTimeMillis();
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54 | running = true;
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55 | }
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56 |
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57 |
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58 | /**
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59 | * Stop the timer.
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60 | */
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61 | public void stop() {
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62 | stopTime = System.currentTimeMillis();
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63 | running = false;
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64 | }
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65 |
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66 |
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67 | /**
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68 | * Return the number of milliseconds the timer has been running.
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69 | *
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70 | * (up till now, if it still runs, up to the stop time if it has been stopped)
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71 | */
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72 | public long diff() {
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73 | if (running)
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74 | return System.currentTimeMillis()-startTime;
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75 | else
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76 | return stopTime-startTime;
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77 | }
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78 |
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79 |
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80 | /**
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81 | * Return a string representation of the timer.
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82 | *
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83 | * @return a string displaying the diff-time in readable format (h m s ms)
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84 | *
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85 | * @see Timer#diff
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86 | */
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87 | public String toString() {
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88 | long diff = diff();
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89 |
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90 | long millis = diff%1000;
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91 | long secs = (diff/1000)%60;
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92 | long mins = (diff/(1000*60))%60;
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93 | long hs = (diff/(1000*3600))%24;
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94 | long days = diff/(1000*3600*24);
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95 |
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96 | if (days > 0)
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97 | return days+"d "+hs+"h "+mins+"m "+secs+"s "+millis+"ms";
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98 |
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99 | if (hs > 0)
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100 | return hs+"h "+mins+"m "+secs+"s "+millis+"ms";
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101 |
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102 | if (mins > 0)
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103 | return mins+"m "+secs+"s "+millis+"ms";
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104 |
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105 | if (secs > 0)
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106 | return secs+"s "+millis+"ms";
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107 |
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108 | return millis+"ms";
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109 | }
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110 | }
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