Function may_dig

src/hack.c:922–929

intended to be called only on ROCKs or TREEs */

/* intended to be called only on ROCKs or TREEs */
boolean
may_dig(coordxy x, coordxy y)
{
    struct rm *lev = &levl[x][y];

    return (boolean) !((IS_STWALL(lev->typ) || IS_TREE(lev->typ))
                       && (lev->wall_info & W_NONDIGGABLE));
}

boolean
may_passwall(coordxy x, coordxy y)