text: /*
   * $QNXLicenseC:
   * Copyright 2008, QNX Software Systems. 
   * 
   * Licensed under the Apache License, Version 2.0 (the "License"). You 
   * may not reproduce, modify or distribute this software except in 
   * compliance with the License. You may obtain a copy of the License 
   * at: http://www.apache.org/licenses/LICENSE-2.0 
   * 
   * Unless required by applicable law or agreed to in writing, software 
   * distributed under the License is distributed on an "AS IS" basis, 
   * WITHOUT WARRANTIES OF ANY KIND, either express or implied.
   *
   * This file may contain contributions from others, either as 
   * contributors under the License or as licensors under other terms.  
   * Please review this entire file for other proprietary rights or license 
   * notices, as well as the QNX Development Suite License Guide at 
   * http://licensing.qnx.com/license-guide/ for other information.
   * $
   */
  
  
  
  
  
  #include "startup.h"
  
  unsigned long
  timer_tick2ns(unsigned long ticks) {
  	int power = (-9) - lsp.qtime.p->timer_scale;
  	unsigned long rate = lsp.qtime.p->timer_rate;
  	unsigned long ns = 0;
  
  	//
  	//Tricky bit. Try to maintain maximum accuracy without overflowing
  	//
  	for( ;; ) {
  		if(ns == 0) {
  			ns = rate * ticks;
  			if((ns / rate) != ticks) {
  				//Overflow
  				ns = 0;
  			}
  		}
  		if(power <= 0) break;
  		ns /= 10;
  		rate /= 10;
  		--power;
  	}
  	while(power < 0) {
  		ns *= 10;
  		++power;
  	}
  	return(ns);
  }
  
  #if defined(__QNXNTO__) && defined(__USESRCVERSION)
  #include <sys/srcversion.h>
  __SRCVERSION("$URL: http://svn.ott.qnx.com/product/branches/7.0.0/trunk/hardware/startup/lib/timer_tick2ns.c $ $Rev: 680332 $")
  #endif
  