interpolate
power = interpolate(chan,
gain = interpolate(chan,
temp = interpolate(chan,
idx = interpolate(pwr, sample[0].power, sample[0].index,
ra->ra_avg_rssi = interpolate(master_expavgctl.rc_avgrssi,
interpolate(master_expavgctl.rc_thresh, last_thr,
interpolate(master_expavgctl.rc_decay, oldthr, newthr);
#ifdef interpolate
if (interpolate(linebuf + 2, collf, mailtempname, c) < 0)