g_rv
gp->g_rv[gp->g_rc].r_from = DEF_LOWUID;
gp->g_rv[gp->g_rc].r_to = DEF_HIGHUID;
gp->g_rv[i].r_from, gp->g_rv[i].r_to);
gp->g_rv[i].r_from, gp->g_rv[i].r_to);
NEWARRAY(range_t, gp->g_rv, gp->g_rsize, exit(1));