Function sel_set_wall_property

src/sp_lev.c:985–995

staticfn void
sel_set_wall_property(coordxy x, coordxy y, genericptr_t arg)
{
    int prop = *(int *) arg;

    if (IS_STWALL(levl[x][y].typ) || IS_TREE(levl[x][y].typ)
        /* 3.6.2: made iron bars eligible to be flagged nondiggable
           (checked by chewing(hack.c) and zap_over_floor(zap.c)) */
        || levl[x][y].typ == IRONBARS)
        levl[x][y].wall_info |= prop;
}

/*
 * Make walls of the area (x1, y1, x2, y2) non diggable/non passwall-able