From bd488934787b3587ec5048db59a7dd14c164ca70 Mon Sep 17 00:00:00 2001
From: rubidium <rubidium@openttd.org>
Date: Sat, 28 Aug 2010 18:23:14 +0000
Subject: (svn r20656) -Codechange: implement counting of objects

---
 src/object_base.h          | 42 ++++++++++++++++++++++++++++++++++++++++++
 src/object_cmd.cpp         |  5 +++++
 src/saveload/afterload.cpp |  1 +
 src/saveload/object_sl.cpp |  2 ++
 4 files changed, 50 insertions(+)

diff --git a/src/object_base.h b/src/object_base.h
index a4e7eb0d7..d5f796191 100644
--- a/src/object_base.h
+++ b/src/object_base.h
@@ -38,6 +38,48 @@ struct Object : ObjectPool::PoolItem<&_object_pool> {
 	 * @return The object.
 	 */
 	static Object *GetByTile(TileIndex tile);
+
+	/**
+	 * Increment the count of objects for this type.
+	 * @param type ObjectType to increment
+	 * @pre type < NUM_OBJECTS
+	 */
+	static inline void IncTypeCount(ObjectType type)
+	{
+		assert(type < NUM_OBJECTS);
+		counts[type]++;
+	}
+
+	/**
+	 * Decrement the count of objects for this type.
+	 * @param type ObjectType to decrement
+	 * @pre type < NUM_OBJECTS
+	 */
+	static inline void DecTypeCount(ObjectType type)
+	{
+		assert(type < NUM_OBJECTS);
+		counts[type]--;
+	}
+
+	/**
+	 * Get the count of objects for this type.
+	 * @param type ObjectType to query
+	 * @pre type < NUM_OBJECTS
+	 */
+	static inline uint16 GetTypeCount(ObjectType type)
+	{
+		assert(type < NUM_OBJECTS);
+		return counts[type];
+	}
+
+	/** Resets object counts. */
+	static inline void ResetTypeCounts()
+	{
+		memset(&counts, 0, sizeof(counts));
+	}
+
+protected:
+	static uint16 counts[NUM_OBJECTS]; ///< Number of objects per type ingame
 };
 
 #define FOR_ALL_OBJECTS_FROM(var, start) FOR_ALL_ITEMS_FROM(Object, object_index, var, start)
diff --git a/src/object_cmd.cpp b/src/object_cmd.cpp
index 660d32991..87d5f7369 100644
--- a/src/object_cmd.cpp
+++ b/src/object_cmd.cpp
@@ -39,6 +39,7 @@
 
 ObjectPool _object_pool("Object");
 INSTANTIATE_POOL_METHODS(Object)
+uint16 Object::counts[NUM_OBJECTS];
 
 /* static */ Object *Object::GetByTile(TileIndex tile)
 {
@@ -49,6 +50,7 @@ INSTANTIATE_POOL_METHODS(Object)
 void InitializeObjects()
 {
 	_object_pool.CleanPool();
+	Object::ResetTypeCounts();
 }
 
 void BuildObject(ObjectType type, TileIndex tile, CompanyID owner, Town *town)
@@ -68,6 +70,8 @@ void BuildObject(ObjectType type, TileIndex tile, CompanyID owner, Town *town)
 		MakeObject(t, type, owner, o->index, wc, Random());
 		MarkTileDirtyByTile(t);
 	}
+
+	Object::IncTypeCount(type);
 }
 
 /**
@@ -317,6 +321,7 @@ static CommandCost ClearTile_Object(TileIndex tile, DoCommandFlag flags)
 	}
 
 	if (flags & DC_EXEC) {
+		Object::DecTypeCount(type);
 		TILE_AREA_LOOP(tile_cur, ta) MakeWaterKeepingClass(tile_cur, GetTileOwner(tile_cur));
 		delete o;
 	}
diff --git a/src/saveload/afterload.cpp b/src/saveload/afterload.cpp
index 388faceee..95a379c9d 100644
--- a/src/saveload/afterload.cpp
+++ b/src/saveload/afterload.cpp
@@ -1875,6 +1875,7 @@ bool AfterLoadGame()
 					o->build_date    = _date;
 					o->town          = type == OBJECT_STATUE ? Town::Get(_m[t].m2) : CalcClosestTownFromTile(t, UINT_MAX);
 					_m[t].m2 = o->index;
+					Object::IncTypeCount(type);
 				} else {
 					/* We're at an offset, so get the ID from our "root". */
 					TileIndex northern_tile = t - TileXY(GB(offset, 0, 4), GB(offset, 4, 4));
diff --git a/src/saveload/object_sl.cpp b/src/saveload/object_sl.cpp
index 0e36100c3..6218eea1e 100644
--- a/src/saveload/object_sl.cpp
+++ b/src/saveload/object_sl.cpp
@@ -11,6 +11,7 @@
 
 #include "../stdafx.h"
 #include "../object_base.h"
+#include "../object_map.h"
 
 #include "saveload.h"
 #include "newgrf_sl.h"
@@ -50,6 +51,7 @@ static void Ptrs_OBJS()
 	Object *o;
 	FOR_ALL_OBJECTS(o) {
 		SlObject(o, _object_desc);
+		Object::IncTypeCount(GetObjectType(o->location.tile));
 	}
 }
 
-- 
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