1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
|
/******************************************************************************/
// 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(); // Does exactly what it says on the tin.
};
/******************************************************************************/
// Executor Interfaces
/******************************************************************************/
class dStateMethodExecutorBase_c {
public:
virtual ~dStateMethodExecutorBase_c() = 0;
virtual void callBegin() = 0;
virtual void callExecute() = 0;
virtual void callEnd() = 0;
};
class dStateExecutorBase_c {
public:
virtual ~dStateExecutorBase_c() = 0;
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*/);
};
|
