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/******************************************************************************/
// dStateBase_c class
/******************************************************************************/
class dStateBase_c {
public:
dStateBase_c(const char *name);
virtual ~dStateBase_c();
virtual bool isInvalid();
virtual bool isEqualNotUsedForSomeReason(dStateBase_c *another);
virtual bool isEqual(dStateBase_c *another);
virtual bool isNotEqual(dStateBase_c *another);
virtual bool isSameStateName(const char *name);
virtual const char *getName();
virtual int getID();
static dStateBase_c mNoState;
private:
const char *mName;
int mID;
static int mLastID;
};
/******************************************************************************/
// dState_c<TOwner> : dStateBase_c class
/******************************************************************************/
template <class TOwner>
class dState_c : public dStateBase_c {
public:
typedef void (TOwner::*funcPtr)();
dState_c(const char *name, funcPtr begin, funcPtr execute, funcPtr end) : dStateBase_c(name) {
mBegin = begin;
mExecute = execute;
mEnd = end;
}
~dState_c();
bool isSameStateName(const char *name);
virtual void doBegin(TOwner *owner);
virtual void doExecute(TOwner *owner);
virtual void doEnd(TOwner *owner);
funcPtr mBegin;
funcPtr mExecute;
funcPtr mEnd;
void *mBaseState;
};
template <class TOwner>
dState_c<TOwner>::~dState_c() { }
template <class TOwner>
bool dState_c<TOwner>::isSameStateName(const char *name) {
const char *p = strrchr(name, ':');
if (p)
name = p + 1;
int cmp = strcmp(strrchr(getName(), ':')+1, name);
if (cmp == 0)
return true;
else
return false;
}
template <class TOwner>
void dState_c<TOwner>::doBegin(TOwner *owner) {
(owner->*mBegin)();
}
template <class TOwner>
void dState_c<TOwner>::doExecute(TOwner *owner) {
(owner->*mExecute)();
}
template <class TOwner>
void dState_c<TOwner>::doEnd(TOwner *owner) {
(owner->*mEnd)();
}
/******************************************************************************/
// A Very Useless Class
/******************************************************************************/
class dStatePointless_c {
public:
virtual ~dStatePointless_c() { };
virtual int returnsOne() { return 1; }
};
/******************************************************************************/
// Executor Interfaces
/******************************************************************************/
class dStateMethodExecutorBase_c {
public:
virtual ~dStateMethodExecutorBase_c() { }
virtual void callBegin() = 0;
virtual void callExecute() = 0;
virtual void callEnd() = 0;
};
class dStateExecutorBase_c {
public:
virtual ~dStateExecutorBase_c() { }
virtual dStateMethodExecutorBase_c *getMethodExecutorForState(dStateBase_c *state) = 0;
virtual void clearMethodExecutor(dStateMethodExecutorBase_c **ptrToPtrToExecutor) = 0;
};
/******************************************************************************/
// Executor Implementations
/******************************************************************************/
template <class TOwner>
class dStateMethodExecutor_c : public dStateMethodExecutorBase_c {
public:
~dStateMethodExecutor_c() { }
void callBegin();
void callExecute();
void callEnd();
TOwner *mOwningObject;
dState_c<TOwner> *mState;
};
template <class TOwner>
class dStateExecutor_c : public dStateExecutorBase_c {
public:
~dStateExecutor_c() { }
dStateMethodExecutorBase_c *getMethodExecutorForState(dStateBase_c *state);
void clearMethodExecutor(dStateMethodExecutorBase_c **ptrToPtrToExecutor);
private:
dStateMethodExecutor_c<TOwner> mStockExecutor;
};
template <class TOwner>
dStateMethodExecutorBase_c *dStateExecutor_c<TOwner>::getMethodExecutorForState(dStateBase_c *state) {
if (!state->isInvalid()) {
mStockExecutor.mState = static_cast<dState_c<TOwner>*>(state);
return &mStockExecutor;
} else {
return 0;
}
}
template <class TOwner>
void dStateExecutor_c<TOwner>::clearMethodExecutor(dStateMethodExecutorBase_c **ptrToPtrToExecutor) {
*ptrToPtrToExecutor = 0;
}
template <class TOwner>
void dStateMethodExecutor_c<TOwner>::callBegin() { mState->doBegin(mOwningObject); }
template <class TOwner>
void dStateMethodExecutor_c<TOwner>::callExecute() { mState->doExecute(mOwningObject); }
template <class TOwner>
void dStateMethodExecutor_c<TOwner>::callEnd() { mState->doEnd(mOwningObject); }
/******************************************************************************/
// dStateMgrBase_c class
/******************************************************************************/
class dStateMgrBase_c {
public:
dStateMgrBase_c(dStatePointless_c *pPointlessClass, dStateExecutorBase_c *pStateExecutor, dStateBase_c *pInitState);
virtual ~dStateMgrBase_c();
virtual void ensureStateHasBegun();
virtual void execute();
virtual void endCurrentState();
virtual void setState(dStateBase_c *pNewState);
virtual void executeNextStateThisTick() {
mExecuteNextStateThisTick = true;
}
virtual dStateMethodExecutorBase_c *getCurrentStateMethodExecutor() {
return mCurrentStateMethodExecutor;
}
virtual dStateBase_c *getNextState() {
return mNextState;
}
virtual dStateBase_c *getCurrentState() {
return mCurrentState;
}
virtual dStateBase_c *getPreviousState() {
return mPreviousState;
}
virtual bool callBeginOnState() = 0;
virtual void callExecuteOnState() = 0;
virtual void callEndOnState() = 0;
virtual void doSwitchToNextState(dStateBase_c *pState/*unused*/) = 0;
protected:
dStatePointless_c *mPointlessClass;
dStateExecutorBase_c *mStateExecutor;
bool mIsStateBeginningOrEnding, mIsStateExecuting;
bool mStateIsCurrentlyActive, mStateChangeHasOccurred;
bool mExecuteNextStateThisTick;
dStateBase_c *mNextState, *mPreviousState, *mCurrentState;
dStateMethodExecutorBase_c *mCurrentStateMethodExecutor;
};
/******************************************************************************/
// dStateMgr_c : dStateMgrBase_c class
/******************************************************************************/
class dStateMgr_c : public dStateMgrBase_c {
public:
dStateMgr_c(dStatePointless_c *pPointlessClass, dStateExecutorBase_c *pStateExecutor, dStateBase_c *pInitState);
~dStateMgr_c() { }
bool callBeginOnState();
void callExecuteOnState();
void callEndOnState();
void doSwitchToNextState(dStateBase_c *pState/*unused*/);
};
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