FSM.cpp

Go to the documentation of this file.

#include "FSM.h"
#include "State.h"
#include "RakAssert.h"



FSM::FSM()
{

}
FSM::~FSM()
{
        Clear();
}
void FSM::Clear(void)
{
        unsigned i;
        if (stateHistory.Size())
                stateHistory[stateHistory.Size()-1]->OnLeave(this, true);
        for (i=0; i < stateHistory.Size(); i++)
                stateHistory[i]->FSMRemoveRef(this);
        stateHistory.Clear(false, __FILE__, __LINE__);
}
State *FSM::CurrentState(void) const
{
        if (stateHistory.Size()==0)
                return 0;
        return stateHistory[stateHistory.Size()-1];
}
State *FSM::GetState(int index) const
{
        RakAssert(index>=0 && index < (int) stateHistory.Size());
        return stateHistory[(unsigned) index];
}
int FSM::GetStateIndex(State *state) const
{
        return (int) stateHistory.GetIndexOf(state);
}
int FSM::GetStateHistorySize(void) const
{
        return stateHistory.Size();
}
void FSM::RemoveState(const int index)
{
        RakAssert(index>=0 && index < (int) stateHistory.Size());
        if (index==stateHistory.Size()-1)
                stateHistory[index]->OnLeave(this, true);
        stateHistory[index]->FSMRemoveRef(this);
        stateHistory.RemoveAtIndex((const unsigned int)index);
        if (index==stateHistory.Size())
                stateHistory[stateHistory.Size()-1]->OnEnter(this, false);
}
void FSM::AddState(State *state)
{
        if (stateHistory.Size())
                stateHistory[stateHistory.Size()-1]->OnLeave(this, false);
        state->FSMAddRef(this);
        state->OnEnter(this, true);
        stateHistory.Insert(state, __FILE__, __LINE__ );
}
void FSM::ReplaceState(const int index, State *state)
{
        RakAssert(index>=0 && index < (int) stateHistory.Size());
        if (state!=stateHistory[index])
        {
                if (index==stateHistory.Size()-1)
                        stateHistory[index]->OnLeave(this, true);
                stateHistory[index]->FSMRemoveRef(this);
                state->FSMAddRef(this);
                if (index==stateHistory.Size()-1)
                        state->OnEnter(this, true);
                stateHistory[index]=state;
        }
}
void FSM::SetPriorState(const int index)
{
        RakAssert(index>=0 && index < (int) stateHistory.Size());
        stateHistory[stateHistory.Size()-1]->OnLeave(this, true);
        for (unsigned i=stateHistory.Size()-1; i > (unsigned) index; --i)
        {
                stateHistory[i]->FSMRemoveRef(this);
                stateHistory.RemoveFromEnd();
        }
        stateHistory[index]->OnEnter(this, false);
}