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
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
|
/*
* Copyright 2006 The Android Open Source Project
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkScript_DEFINED
#define SkScript_DEFINED
#include "SkOperand.h"
#include "SkIntArray.h"
#include "SkTDict.h"
#include "SkTDStack.h"
class SkAnimateMaker;
class SkScriptEngine {
public:
enum Error {
kNoError,
kArrayIndexOutOfBounds,
kCouldNotFindReferencedID,
kDotOperatorExpectsObject,
kErrorInArrrayIndex,
kErrorInFunctionParameters,
kExpectedArray,
kExpectedBooleanExpression,
kExpectedFieldName,
kExpectedHex,
kExpectedIntForConditionOperator,
kExpectedNumber,
kExpectedNumberForArrayIndex,
kExpectedOperator,
kExpectedToken,
kExpectedTokenBeforeDotOperator,
kExpectedValue,
kHandleMemberFailed,
kHandleMemberFunctionFailed,
kHandleUnboxFailed,
kIndexOutOfRange,
kMismatchedArrayBrace,
kMismatchedBrackets,
kNoFunctionHandlerFound,
kPrematureEnd,
kTooManyParameters,
kTypeConversionFailed,
kUnterminatedString
};
enum SkOpType {
kNoType,
kInt = 1,
kScalar = 2,
kString = 4,
kArray = 8,
kObject = 16
// kStruct = 32
};
typedef bool (*_boxCallBack)(void* userStorage, SkScriptValue* result);
typedef bool (*_functionCallBack)(const char* func, size_t len, SkTDArray<SkScriptValue>& params,
void* userStorage, SkScriptValue* result);
typedef bool (*_memberCallBack)(const char* member, size_t len, void* object,
void* userStorage, SkScriptValue* result);
typedef bool (*_memberFunctionCallBack)(const char* member, size_t len, void* object,
SkTDArray<SkScriptValue>& params, void* userStorage, SkScriptValue* result);
// typedef bool (*_objectToStringCallBack)(void* object, void* userStorage, SkScriptValue* result);
typedef bool (*_propertyCallBack)(const char* prop, size_t len, void* userStorage, SkScriptValue* result);
typedef bool (*_unboxCallBack)(void* userStorage, SkScriptValue* result);
SkScriptEngine(SkOpType returnType);
~SkScriptEngine();
void boxCallBack(_boxCallBack func, void* userStorage);
bool convertTo(SkDisplayTypes , SkScriptValue* );
bool evaluateScript(const char** script, SkScriptValue* value);
void forget(SkTypedArray* array);
void functionCallBack(_functionCallBack func, void* userStorage);
Error getError() const { return fError; }
#ifdef SK_DEBUG
bool getErrorString(SkString* err) const;
#endif
void memberCallBack(_memberCallBack , void* userStorage);
void memberFunctionCallBack(_memberFunctionCallBack , void* userStorage);
// void objectToStringCallBack(_objectToStringCallBack , void* userStorage);
void propertyCallBack(_propertyCallBack prop, void* userStorage);
void track(SkTypedArray* array);
void track(SkString* string);
void unboxCallBack(_unboxCallBack func, void* userStorage);
static bool ConvertTo(SkScriptEngine* , SkDisplayTypes toType, SkScriptValue* value);
static SkScalar IntToScalar(int32_t );
static SkDisplayTypes ToDisplayType(SkOpType type);
static SkOpType ToOpType(SkDisplayTypes type);
static bool ValueToString(SkScriptValue value, SkString* string);
enum CallBackType {
kBox,
kFunction,
kMember,
kMemberFunction,
// kObjectToString,
kProperty,
kUnbox
};
struct UserCallBack {
CallBackType fCallBackType;
void* fUserStorage;
union {
_boxCallBack fBoxCallBack;
_functionCallBack fFunctionCallBack;
_memberCallBack fMemberCallBack;
_memberFunctionCallBack fMemberFunctionCallBack;
// _objectToStringCallBack fObjectToStringCallBack;
_propertyCallBack fPropertyCallBack;
_unboxCallBack fUnboxCallBack;
};
};
enum SkOp {
kUnassigned,
kAdd,
kAddInt = kAdd,
kAddScalar,
kAddString, // string concat
kArrayOp,
kBitAnd,
kBitNot,
kBitOr,
kDivide,
kDivideInt = kDivide,
kDivideScalar,
kElse,
kEqual,
kEqualInt = kEqual,
kEqualScalar,
kEqualString,
kFlipOps,
kGreaterEqual,
kGreaterEqualInt = kGreaterEqual,
kGreaterEqualScalar,
kGreaterEqualString,
kIf,
kLogicalAnd,
kLogicalNot,
kLogicalOr,
kMinus,
kMinusInt = kMinus,
kMinusScalar,
kModulo,
kModuloInt = kModulo,
kModuloScalar,
kMultiply,
kMultiplyInt = kMultiply,
kMultiplyScalar,
kParen,
kShiftLeft,
kShiftRight, // signed
kSubtract,
kSubtractInt = kSubtract,
kSubtractScalar,
kXor,
kArtificialOp = 0x40
};
enum SkOpBias {
kNoBias,
kTowardsNumber = 0,
kTowardsString
};
protected:
struct SkOperatorAttributes {
unsigned int fLeftType : 3; // SkOpType, but only lower values
unsigned int fRightType : 3; // SkOpType, but only lower values
SkOpBias fBias : 1;
};
struct SkSuppress { // !!! could be compressed to a long
SkOp fOperator; // operand which enabled suppression
int fOpStackDepth; // depth when suppression operator was found
SkBool8 fSuppress; // set if suppression happens now, as opposed to later
SkBool8 fElse; // set on the : half of ? :
};
static const SkOperatorAttributes gOpAttributes[];
static const signed char gPrecedence[];
int arithmeticOp(char ch, char nextChar, bool lastPush);
void commonCallBack(CallBackType type, UserCallBack& callBack, void* userStorage);
bool convertParams(SkTDArray<SkScriptValue>&, const SkFunctionParamType* ,
int paramTypeCount);
void convertToString(SkOperand& operand, SkDisplayTypes type) {
SkScriptValue scriptValue;
scriptValue.fOperand = operand;
scriptValue.fType = type;
convertTo(SkType_String, &scriptValue);
operand = scriptValue.fOperand;
}
bool evaluateDot(const char*& script, bool suppressed);
bool evaluateDotParam(const char*& script, bool suppressed, const char* field, size_t fieldLength);
bool functionParams(const char** scriptPtr, SkTDArray<SkScriptValue>& params);
bool handleArrayIndexer(const char** scriptPtr, bool suppressed);
bool handleBox(SkScriptValue* value);
bool handleFunction(const char** scriptPtr, bool suppressed);
bool handleMember(const char* field, size_t len, void* object);
bool handleMemberFunction(const char* field, size_t len, void* object, SkTDArray<SkScriptValue>& params);
// bool handleObjectToString(void* object);
bool handleProperty(bool suppressed);
bool handleUnbox(SkScriptValue* scriptValue);
bool innerScript(const char** scriptPtr, SkScriptValue* value);
int logicalOp(char ch, char nextChar);
Error opError();
bool processOp();
void setAnimateMaker(SkAnimateMaker* maker) { fMaker = maker; }
bool setError(Error , const char* pos);
enum SkBraceStyle {
// kStructBrace,
kArrayBrace,
kFunctionBrace
};
#if 0
SkIntArray(SkBraceStyle) fBraceStack; // curly, square, function paren
SkIntArray(SkOp) fOpStack;
SkIntArray(SkOpType) fTypeStack;
SkTDOperandArray fOperandStack;
SkTDArray<SkSuppress> fSuppressStack;
#else
SkTDStack<SkBraceStyle> fBraceStack; // curly, square, function paren
SkTDStack<SkOp> fOpStack;
SkTDStack<SkOpType> fTypeStack;
SkTDStack<SkOperand> fOperandStack;
SkTDStack<SkSuppress> fSuppressStack;
#endif
SkAnimateMaker* fMaker;
SkTDTypedArrayArray fTrackArray;
SkTDStringArray fTrackString;
const char* fToken; // one-deep stack
size_t fTokenLength;
SkTDArray<UserCallBack> fUserCallBacks;
SkOpType fReturnType;
Error fError;
int fErrorPosition;
private:
friend class SkTypedArray;
#ifdef SK_SUPPORT_UNITTEST
public:
static void UnitTest();
#endif
};
#ifdef SK_SUPPORT_UNITTEST
struct SkScriptNAnswer {
const char* fScript;
SkDisplayTypes fType;
int32_t fIntAnswer;
SkScalar fScalarAnswer;
const char* fStringAnswer;
};
#endif
#endif // SkScript_DEFINED
|
