unpack
extern char **unpack(struct name *np);
namelist = unpack(to);
static void unpack(void);
unpack();
unpack();
unpack();
low = unpack(constant, LOW_SHIFT);
high = unpack(constant, HIGH_SHIFT);
nsteps = unpack(constant, NSTEP_SHIFT);
factor = unpack(constant, FACTOR_SHIFT);
{"unpack", unpack},