Changeset - r12990:c3b80f9ad9d5
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master
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rubidium - 15 years ago 2009-09-10 14:36:38
rubidium@openttd.org
(svn r17494) -Codechange: improve algorithmic complexitiy of Depot::GetByTile from O(n) to O(1)
2 files changed with 5 insertions and 25 deletions:
0 comments (0 inline, 0 general)
src/depot.cpp
Show inline comments
 
@@ -24,29 +24,6 @@ DepotPool _depot_pool("Depot");
 
INSTANTIATE_POOL_METHODS(Depot)
 

	
 
/**
 
 * Gets a depot from a tile
 
 * @param tile tile with depot
 
 * @return Returns the depot if the tile had a depot, else it returns NULL
 
 */
 
/* static */ Depot *Depot::GetByTile(TileIndex tile)
 
{
 
	/* A ship depot is multiple tiles. The north most tile is
 
	 * always the ->xy tile, so make sure we always look for
 
	 * the nothern tile and not the southern one. */
 
	if (IsShipDepotTile(tile)) {
 
		tile = min(tile, GetOtherShipDepotTile(tile));
 
	}
 

	
 
	Depot *depot;
 

	
 
	FOR_ALL_DEPOTS(depot) {
 
		if (depot->xy == tile) return depot;
 
	}
 

	
 
	return NULL;
 
}
 

	
 
/**
 
 * Clean up a depot
 
 */
 
Depot::~Depot()
src/depot_base.h
Show inline comments
 
@@ -13,7 +13,7 @@
 
#define DEPOT_BASE_H
 

	
 
#include "tile_type.h"
 
#include "depot_type.h"
 
#include "depot_map.h"
 
#include "core/pool_type.hpp"
 
#include "town_type.h"
 

	
 
@@ -27,7 +27,10 @@ struct Depot : DepotPool::PoolItem<&_dep
 
	Depot(TileIndex xy = INVALID_TILE) : xy(xy) {}
 
	~Depot();
 

	
 
	static Depot *GetByTile(TileIndex tile);
 
	static FORCEINLINE Depot *GetByTile(TileIndex tile)
 
	{
 
		return Depot::Get(GetDepotIndex(tile));
 
	}
 
};
 

	
 
#define FOR_ALL_DEPOTS_FROM(var, start) FOR_ALL_ITEMS_FROM(Depot, depot_index, var, start)
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