(svn r12307) [NoAI] -Codechange: as followup on r12303 (trunk), use ::IsValidTile to check if a tile is inside the map, instead of all our custom ways
/* $Id$ */
/** @file ai_town.hpp Everything to query towns */
#ifndef AI_TOWN_HPP
#define AI_TOWN_HPP
#include "ai_object.hpp"
#include "../../town_type.h"
/**
* Class that handles all town related functions.
*/
class AITown : public AIObject {
public:
/**
* The name of the class, needed by several sub-processes.
*/
static const char *GetClassName() { return "AITown"; }
/**
* Gets the maximum town index; there are no valid towns with a higher index.
* @return the maximum town index.
* @post return value is always non-negative.
*/
static TownID GetMaxTownID();
/**
* Gets the number of towns. This is different than GetMaxTownID()
* because of the way OpenTTD works internally.
* @return the number of towns.
* @post return value is always non-negative.
*/
static int32 GetTownCount();
/**
* Checks whether the given town index is valid.
* @param town_id the index to check.
* @return true if and only if the town is valid.
*/
static bool IsValidTown(TownID town_id);
/**
* Get the name of the town.
* @param town_id the town to get the name of.
* @pre town_id has to be valid (use IsValidTown()).
* @return the name of the town.
* @note the returned name must be free'd (C++ only).
*/
static char *GetName(TownID town_id);
/**
* Gets the number of inhabitants in the town.
* @param town_id the town to get the name of.
* @pre town_id has to be valid (use IsValidTown()).
* @return the number of inhabitants.
* @post return value is always non-negative.
*/
static int32 GetPopulation(TownID town_id);
/**
* Gets the location of the town.
* @param town_id the location of the town.
* @pre town_id has to be valid (use IsValidTown()).
* @return the location of the town.
* @post return value is always valid with AIMap::IsValidTile().
*/
static TileIndex GetLocation(TownID town_id);
};
#endif /* AI_TOWN_HPP */