Function CountMapSquareAround

src/station_cmd.cpp:157–169

* Counts the numbers of tiles matching a specific type in the area around * @param tile the center tile of the 'count area' * @param cmp the comparator/matcher (@see CMSAMatcher) * @return the number of matching tiles around */

 * @return the number of matching tiles around
 */
static int CountMapSquareAround(TileIndex tile, CMSAMatcher cmp)
{
	int num = 0;

	for (int dx = -3; dx <= 3; dx++) {
		for (int dy = -3; dy <= 3; dy++) {
			TileIndex t = TileAddWrap(tile, dx, dy);
			if (t != INVALID_TILE && cmp(t)) num++;
		}
	}

	return num;
}

/**
 * Check whether the tile is a mine.