readrange
if (readrange(rl, &rl->rl_runetype_ext, runetype_nranges, lastp, fp) ||
readrange(rl, &rl->rl_maplower_ext, maplower_nranges, lastp, fp) ||
readrange(rl, &rl->rl_mapupper_ext, mapupper_nranges, lastp, fp))
static int readrange(_RuneLocale *, _RuneRange *, uint32_t, void *, FILE *);