Function check_pos

src/display.c:3129–3141

* Return 'which' if position is implies an unfinished exterior. Return * zero otherwise. Unfinished implies outer area is rock or a corridor. * * Things that are ambiguous: lava */

 * Things that are ambiguous: lava
 */
staticfn int
check_pos(coordxy x, coordxy y, int which)
{
    int type;

    if (!isok(x, y))
        return which;
    type = levl[x][y].typ;
    /* Everything below POOL, excluding TREE */
    if (IS_STWALL(type) || type == CORR || type == SCORR || IS_SDOOR(type))
        return which;
    return 0;
}

/* Return TRUE if more than one is non-zero. */
/*ARGSUSED*/