particle getSystemStatus() parsing

gistfile1.txt

/*
* Particle leaves it to the datasheet to explain.
* 
* http://www.ti.com/lit/ds/symlink/bq24195.pdf
* page 32.
*/

int vbus_status(systemStatus)
{
  vbus = (systemStatus >> 6) & 3;
  if(vbus == 0)
  {
	  return UNKNOWN;
  }
  else if(vbus == 1)
  {
	  return USB_HOST;
  }
  else if(vbus == 2)
  {
	  return ADAPTER_PORT;
  }
  else if(vbus == 3)
  {
	  return OTG;
  }
}

int charging_status(systemStatus)
{
  charging = (systemStatus >> 4) & 3;
  if(charging == 0)
  {
	  return NOT_CHARGING;
  }
  else if(charging == 1)
  {
	  return PRE_CHARGE;
  }
  else if(charging == 2)
  {
	  return FAST_CHARGING;
  }
  else if(charging == 3)
  {
	  return CHARGE_TERMINATION_DONE;
  }
}

int dpm_status(systemStatus)
{
  dpm = (systemStatus >> 3) & 1;
  if(dpm == 1)
  {
	  return VINDPM_OR_IINDPM;
  }
  else if(dpm == 0)
  {
	  return Not_DPM;
  }
}

int power_good_status(systemStatus)
{
  power_good = (systemStatus >> 2) & 1;
  if(power_good == 1)
  {
	  return POWER_GOOD;
  }
  else if(power_good == 0)
  {
	  return NOT_POWER_GOOD;
  }
}

int thermal_status(systemStatus)
{
  therm = (systemStatus >> 1) & 1;
  if(therm == 1)
  {
	  return IN_THERMAL_REGULATION;
  }
  else if(therm == 0)
  {
	  return NORMAL;
  }
}

int vsys_status(systemStatus)
{
  vsys = systemStatus & 1;
  if(vsys == 1)
  {
	  return IN_VSYSMIN_REGULATION;
  }
  else if(vsys == 0)
  {
    return NOT_IN_VSYSMIN_REGULATION;
  }
}