Function mazexy

src/mkmaze.c:1315–1350

find random point in generated corridors, so we don't create items in moats, bunkers, or walls */

/* find random point in generated corridors,
   so we don't create items in moats, bunkers, or walls */
void
mazexy(coord *cc)
{
    coordxy x, y;
    int allowedtyp = (svl.level.flags.corrmaze ? CORR : ROOM);
    int cpt = 0;

    do {
        /* once upon a time this only considered odd values greater than 2
           and less than N (for N=={x,y}_maze_max) because even values were
           where maze walls always got placed; when wider maze corridors
           were introduced it was changed to 1+rn2(N) which is just an
           obscure way to get rnd(N); probably ought to be using 2+rn2(N-1)
           to exclude the maze's outer boundary walls; trying and rejecting
           those walls will waste some of the 100 random attempts... */
        x = rnd(gx.x_maze_max);
        y = rnd(gy.y_maze_max);
        if (levl[x][y].typ == allowedtyp) {
            cc->x = x;
            cc->y = y;
            return;
        }
    } while (++cpt < 100);
    /* 100 random attempts failed; systematically try every possibility */
    for (x = 1; x <= gx.x_maze_max; x++)
        for (y = 1; y <= gy.y_maze_max; y++)
            if (levl[x][y].typ == allowedtyp) {
                cc->x = x;
                cc->y = y;
                return;
            }
    /* every spot on the area of map allowed for mazes has been rejected */
    panic("mazexy: can't find a place!");
    /*NOTREACHED*/
    return;
}

void
get_level_extends(