compile-fc-batt: allow possible third field in source lines Battery tables maintained in the fc-battery-conf repository will now have a third field added, defining thresholds for the battery bars icon, and there will be a new utility to compile them into the new /etc/batterytab2 file read by the FC Tourmaline version of our FCHG driver. For backward compatibility with the original Magnetite version of FCHG, compile-fc-batt remains the tool for compiling the original /etc/batterytab file format, and it needs to ignore the newly added third field in battery table sources.

/*
 * This library module implements unpacking of GSM 7-bit data
 * from packed octets.
 */

#include <sys/types.h>

static u_char shift[8] = {0, 7, 6, 5, 4, 3, 2, 1};

gsm7_unpack(inbuf, outbuf, nseptets)
	u_char *inbuf, *outbuf;
	unsigned nseptets;
{
	u_char *inp = inbuf, *outp = outbuf;
	unsigned n;

	for (n = 0; n < nseptets; n++) {
		*outp++ = (((inp[1] << 8) | inp[0]) >> shift[n&7]) & 0x7F;
		if (n & 7)
			inp++;
	}
}