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/* $Id$ */
#ifndef TRAIN_H
#define TRAIN_H
#include "stdafx.h"
#include "vehicle.h"
/*
* enum to handle train subtypes
* Do not access it directly unless you have to. Use the access functions below
* This is an enum to tell what bit to access as it is a bitmask
*/
typedef enum TrainSubtypes {
Train_Front = 0, // Leading engine of a train
Train_Articulated_Part = 1, // Articulated part of an engine
Train_Wagon = 2, // Wagon
Train_Engine = 3, // Engine, that can be front engines, but might be placed behind another engine
Train_Free_Wagon = 4, // First in a wagon chain (in depot)
Train_Multiheaded = 5, // Engine is a multiheaded
} TrainSubtype;
/** Check if a vehicle is front engine
* @param v vehicle to check
* @return Returns true if vehicle is a front engine
*/
static inline bool IsFrontEngine(const Vehicle *v)
{
return HASBIT(v->subtype, Train_Front);
}
/** Set front engine state
* @param v vehicle to change
*/
static inline void SetFrontEngine(Vehicle *v)
{
SETBIT(v->subtype, Train_Front);
}
/** Remove the front engine state
* @param v vehicle to change
*/
static inline void ClearFrontEngine(Vehicle *v)
{
CLRBIT(v->subtype, Train_Front);
}
/** Check if a vehicle is an articulated part of an engine
* @param v vehicle to check
* @return Returns true if vehicle is an articulated part
*/
static inline bool IsArticulatedPart(const Vehicle *v)
{
return HASBIT(v->subtype, Train_Articulated_Part);
}
/** Set a vehicle to be an articulated part
* @param v vehicle to change
*/
static inline void SetArticulatedPart(Vehicle *v)
{
SETBIT(v->subtype, Train_Articulated_Part);
}
/** Clear a vehicle from being an articulated part
* @param v vehicle to change
*/
static inline void ClearArticulatedPart(Vehicle *v)
{
CLRBIT(v->subtype, Train_Articulated_Part);
}
/** Check if a vehicle is a wagon
* @param v vehicle to check
* @return Returns true if vehicle is a wagon
*/
static inline bool IsTrainWagon(const Vehicle *v)
{
return HASBIT(v->subtype, Train_Wagon);
}
/** Set a vehicle to be a wagon
* @param v vehicle to change
*/
static inline void SetTrainWagon(Vehicle *v)
{
SETBIT(v->subtype, Train_Wagon);
}
/** Clear wagon property
* @param v vehicle to change
*/
static inline void ClearTrainWagon(Vehicle *v)
{
CLRBIT(v->subtype, Train_Wagon);
}
/** Check if a vehicle is an engine (can be first in a train)
* @param v vehicle to check
* @return Returns true if vehicle is an engine
*/
static inline bool IsTrainEngine(const Vehicle *v)
{
return HASBIT(v->subtype, Train_Engine);
}
/** Set engine status
* @param v vehicle to change
*/
static inline void SetTrainEngine(Vehicle *v)
{
SETBIT(v->subtype, Train_Engine);
}
/** Clear engine status
* @param v vehicle to change
*/
static inline void ClearTrainEngine(Vehicle *v)
{
CLRBIT(v->subtype, Train_Engine);
}
/** Check if a vehicle is a free wagon (got no engine in front of it)
* @param v vehicle to check
* @return Returns true if vehicle is a free wagon
*/
static inline bool IsFreeWagon(const Vehicle *v)
{
return HASBIT(v->subtype, Train_Free_Wagon);
}
/** Set if a vehicle is a free wagon
* @param v vehicle to change
*/
static inline void SetFreeWagon(Vehicle *v)
{
SETBIT(v->subtype, Train_Free_Wagon);
}
/** Clear a vehicle from being a free wagon
* @param v vehicle to change
*/
static inline void ClearFreeWagon(Vehicle *v)
{
CLRBIT(v->subtype, Train_Free_Wagon);
}
/** Check if a vehicle is a multiheaded engine
* @param v vehicle to check
* @return Returns true if vehicle is a multiheaded engine
*/
static inline bool IsMultiheaded(const Vehicle *v)
{
return HASBIT(v->subtype, Train_Multiheaded);
}
/** Set if a vehicle is a multiheaded engine
* @param v vehicle to change
*/
static inline void SetMultiheaded(Vehicle *v)
{
SETBIT(v->subtype, Train_Multiheaded);
}
/** Clear multiheaded engine property
* @param v vehicle to change
*/
static inline void ClearMultiheaded(Vehicle *v)
{
CLRBIT(v->subtype, Train_Multiheaded);
}
/** Check if an engine has an articulated part.
* @param v Vehicle.
* @return True if the engine has an articulated part.
*/
static inline bool EngineHasArticPart(const Vehicle *v)
{
return (v->next != NULL && IsArticulatedPart(v->next));
}
/**
* Get the next part of a multi-part engine.
* Will only work on a multi-part engine (EngineHasArticPart(v) == true),
* Result is undefined for normal engine.
*/
static inline Vehicle *GetNextArticPart(const Vehicle *v)
{
assert(EngineHasArticPart(v));
return v->next;
}
/** Get the last part of a multi-part engine.
* @param v Vehicle.
* @return Last part of the engine.
*/
static inline Vehicle *GetLastEnginePart(Vehicle *v)
{
while (EngineHasArticPart(v)) v = GetNextArticPart(v);
return v;
}
/** Get the next real (non-articulated part) vehicle in the consist.
* @param v Vehicle.
* @return Next vehicle in the consist.
*/
static inline Vehicle *GetNextVehicle(const Vehicle *v)
{
while (EngineHasArticPart(v)) v = GetNextArticPart(v);
/* v now contains the last artic part in the engine */
return v->next;
}
void ConvertOldMultiheadToNew(void);
void ConnectMultiheadedTrains(void);
static inline bool IsWholeTrainInDepot(const Vehicle *v)
{
for (; v != NULL; v = v->next) {
if (!(v->vehstatus & VS_HIDDEN)) return false;
}
return true;
}
#endif /* TRAIN_H */
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