<?php
/**
 * General purpose stopwatch
 *
 *
 * $Id$
 *
 * @author gERD Schaufelberger <gerd@php-tools.net>
 * @license PHP License
 * @package WB
 * @subpackage base
 */

/**
 * General purpose stopwatch
 *
 * Tiny stopwatch
 *
 * @version 0.1.1
 * @package WB
 * @subpackage base
 */
abstract class WBClock extends WBStdClass
{
   /**
    * get current time
    *
    * @return float
    */
    static public function now()
    {
        return microtime( true );
    }

   /**
    * stop watch
    *
    * Calculate time between $start and now
    *
    * @param float $start
    * @param int $factor
    * @param int $digits
    * @return string
    */
    static public function stop( $start = null, $factor = 1000, $digits = 3 )
    {
        $now    =   self::now();
        if( $start == null ) {
            $start  =   WBParam::get( 'wb/time/genesis' );
        }

        $elapsed    =   $now - $start;
        if( $factor ) {
            $elapsed *= $factor;
        }

        return number_format( $elapsed, $digits, '.', '' );
    }
}
?>