summaryrefslogtreecommitdiffstats
path: root/src/script/qscriptcompiler_p.h
blob: 84186a38c6526e40c9b56d453865ee2049d83b6c (plain)
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
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtScript module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights.  These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QSCRIPTCOMPILER_P_H
#define QSCRIPTCOMPILER_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <QtCore/QMap>

#ifndef QT_NO_SCRIPT

#include <QtCore/QVector>

#include "qscriptastvisitor_p.h"
#include "qscriptasm_p.h"

QT_BEGIN_NAMESPACE

class QScriptEnginePrivate;

namespace QScript {

class Compiler: protected AST::Visitor
{
public:
    Compiler(QScriptEnginePrivate *eng);
    virtual ~Compiler();

    inline QScriptEnginePrivate *engine() const { return m_eng; }

    bool topLevelCompiler() const;
    void setTopLevelCompiler(bool b);

    CompilationUnit compile(AST::Node *node, const QList<QScriptNameIdImpl *> &formals
                            = QList<QScriptNameIdImpl *>());

    struct Label {
        Label(int o = 0):
            offset (o) {}

        int offset;
        QVector<int> uses;
    };

// instruction set
    void iAdd();
    void iAssign();
    void iBitAnd();
    void iBitOr();
    void iBitXor();
    void iBitNot();
    void iBranch(int index);
    void iBranchTrue(int index);
    void iBranchFalse(int index);
    void iCall(int argc);
    void iDeclareLocal(QScriptNameIdImpl *id, bool readOnly);
    void iDecr();
    void iDelete();
    void iDiv();
    void iDuplicate();
    void iEqual();
    void iFetch(QScriptNameIdImpl *id);
    void iFetchField();
    void iLazyArguments();
    void iGreatOrEqual();
    void iGreatThan();
    void iIncr();
    void iInplaceAdd();
    void iInplaceAnd();
    void iInplaceDecr();
    void iInplaceDiv();
    void iInplaceLeftShift();
    void iInplaceMod();
    void iInplaceMul();
    void iInplaceOr();
    void iInplaceRightShift();
    void iInplaceSub();
    void iInplaceURightShift();
    void iInstanceOf();
    void iLeftShift();
    void iLessOrEqual();
    void iLessThan();
    void iLoadFalse();
    void iLoadNumber(double number);
    void iLoadString(QScriptNameIdImpl *id);
    void iNewString(QScriptNameIdImpl *id);
    void iLoadThis();
    void iLoadActivation();
    void iLoadNull();
    void iLoadTrue();
    void iLoadUndefined();
    void iMod();
    void iMul();
    void iUnaryPlus();
    void iUnaryMinus();
    void iNew(int argc);
    void iNewArray();
    void iNewClosure(AST::FunctionExpression *expr);
    void iNewObject();
    void iNewRegExp(QScriptNameIdImpl *pattern);
    void iNewRegExp(QScriptNameIdImpl *pattern, int flags);
    void iNot();
    void iNotEqual();
    void iPop();
    void iPostDecr();
    void iPostIncr();
    void iPutField();
    void iResolve(QScriptNameIdImpl *id);
    void iRet();
    void iRightShift();
    void iSub();
    void iStrictEqual();
    void iStrictNotEqual();
    void iSwap();
    void iThrow();
    void iTypeOf();
    void iURightShift();
    void iInplaceXor();
    void iLine(AST::Node *node);
    void iNewEnumeration();
    void iToFirstElement();
    void iHasNextElement();
    void iNextElement();
    void iEnterWith();
    void iLeaveWith();
    void iBeginCatch(QScriptNameIdImpl *id);
    void iEndCatch();
    void iSync();
    void iHalt();
    void iMakeReference();
    void iIn();
    void iNop();
    void iDebugger();

protected:
    virtual bool preVisit(AST::Node *node);

    virtual bool visit(AST::ArrayLiteral *node);
    virtual bool visit(AST::ArrayMemberExpression *node);
    virtual bool visit(AST::Expression *node);
    virtual bool visit(AST::BinaryExpression *node);
    virtual bool visit(AST::BreakStatement *node);
    virtual bool visit(AST::CallExpression *node);
    virtual bool visit(AST::ConditionalExpression *node);
    virtual bool visit(AST::ContinueStatement *node);
    virtual bool visit(AST::DeleteExpression *node);
    virtual bool visit(AST::DoWhileStatement *node);
    virtual bool visit(AST::ExpressionStatement *node);
    virtual bool visit(AST::FalseLiteral *node);
    virtual bool visit(AST::FieldMemberExpression *node);
    virtual bool visit(AST::ForEachStatement *node);
    virtual bool visit(AST::LocalForEachStatement *node);
    virtual bool visit(AST::ForStatement *node);
    virtual bool visit(AST::FunctionDeclaration *node);
    virtual bool visit(AST::FunctionExpression *node);
    virtual bool visit(AST::FunctionSourceElement *node);
    virtual bool visit(AST::IdentifierExpression *node);
    virtual bool visit(AST::IfStatement *node);
    virtual bool visit(AST::LabelledStatement *node);
    virtual bool visit(AST::LocalForStatement *node);
    virtual bool visit(AST::NewExpression *node);
    virtual bool visit(AST::NewMemberExpression *node);
    virtual bool visit(AST::NumericLiteral *node);
    virtual bool visit(AST::ObjectLiteral *node);
    virtual bool visit(AST::PostDecrementExpression *node);
    virtual bool visit(AST::PostIncrementExpression *node);
    virtual bool visit(AST::PreDecrementExpression *node);
    virtual bool visit(AST::PreIncrementExpression *node);
    virtual bool visit(AST::RegExpLiteral *node);
    virtual bool visit(AST::ReturnStatement *node);
    virtual bool visit(AST::SourceElements *node);
    virtual bool visit(AST::StatementList *node);
    virtual bool visit(AST::StatementSourceElement *node);
    virtual bool visit(AST::StringLiteral *node);
    virtual bool visit(AST::SwitchStatement *node);
    virtual bool visit(AST::ThisExpression *node);
    virtual bool visit(AST::NullExpression *node);
    virtual bool visit(AST::ThrowStatement *node);
    virtual bool visit(AST::TryStatement *node);
    virtual bool visit(AST::TrueLiteral *node);
    virtual bool visit(AST::VariableStatement *node);
    virtual bool visit(AST::VariableDeclaration *node);
    virtual bool visit(AST::WhileStatement *node);
    virtual bool visit(AST::WithStatement *node);
    virtual bool visit(AST::Block *node);
    virtual bool visit(AST::TypeOfExpression *node);
    virtual bool visit(AST::DebuggerStatement *node);

    virtual void endVisit(AST::BreakStatement *node);
    virtual void endVisit(AST::ContinueStatement *node);
    virtual void endVisit(AST::ExpressionStatement *node);
    virtual void endVisit(AST::NotExpression *node);
    virtual void endVisit(AST::ReturnStatement *node);
    virtual void endVisit(AST::ThrowStatement *node);
    virtual void endVisit(AST::TildeExpression *node);
    virtual void endVisit(AST::UnaryPlusExpression *node);
    virtual void endVisit(AST::UnaryMinusExpression *node);
    virtual void endVisit(AST::VoidExpression *node);
    virtual void endVisit(AST::EmptyStatement *node);

    void visitForInternal(AST::Statement *node, AST::ExpressionNode *condition,
                          AST::Statement *statement, AST::ExpressionNode *expression);

    bool isAssignmentOperator(int op) const;
    int inplaceAssignmentOperator(int op) const;

    inline int nextInstructionOffset() const
    { return m_instructions.count(); }

    inline void pushInstruction(QScriptInstruction::Operator op)
    {
        pushInstruction(op, QScriptValueImpl(), QScriptValueImpl());
    }

    inline void pushInstruction(QScriptInstruction::Operator op,
                                const QScriptValueImpl &arg1)
    {
        pushInstruction(op, arg1, QScriptValueImpl());
    }

    inline void pushInstruction(QScriptInstruction::Operator op,
                                const QScriptValueImpl &arg1,
                                const QScriptValueImpl &arg2)
    {
        QScriptInstruction i;
        i.op = op;
        i.operand[0] = arg1;
        i.operand[1] = arg2;
        m_instructions.append(i);
    }

    inline bool generateReferences(bool b)
    {
        bool was = m_generateReferences;
        m_generateReferences = b;
        return was;
    }

    inline bool generateFastArgumentLookup(bool b)
    {
        bool was = m_generateFastArgumentLookup;
        m_generateFastArgumentLookup= b;
        return was;
    }

    inline bool iterationStatement(bool b)
    {
        bool was = m_iterationStatement;
        m_iterationStatement = b;
        return was;
    }

    inline bool switchStatement(bool b)
    {
        bool was = m_switchStatement;
        m_switchStatement = b;
        return was;
    }

    inline bool changeParseStatements(bool b)
    {
        bool was = m_parseStatements;
        m_parseStatements = b;
        return was;
    }

    inline bool withStatement(bool b)
    {
        bool was = m_withStatement;
        m_withStatement = b;
        return was;
    }

    inline bool generateLeaveOnBreak(bool b)
    {
        bool was = m_generateLeaveWithOnBreak;
        m_generateLeaveWithOnBreak = b;
        return was;
    }

    void patchInstruction(int index, int offset);

private:
    QScriptEnginePrivate *m_eng;

    uint m_generateReferences: 1;
    uint m_iterationStatement: 1;
    uint m_switchStatement: 1;
    uint m_withStatement: 1;
    uint m_generateLeaveWithOnBreak: 1;
    uint m_generateFastArgumentLookup: 1;
    uint m_parseStatements: 1;
    uint m_pad: 25;

    bool m_topLevelCompiler; // bit
    QVector<QScriptInstruction> m_instructions;
    QVector<ExceptionHandlerDescriptor> m_exceptionHandlers;
    QList<QScriptNameIdImpl *> m_formals;

    struct Loop {
        Loop(QScriptNameIdImpl *n = 0):
            name(n) {}

        QScriptNameIdImpl *name;
        Label breakLabel;
        Label continueLabel;
    };

    inline Loop *changeActiveLoop(Loop *activeLoop)
    {
        Loop *was = m_activeLoop;
        m_activeLoop = activeLoop;
        return was;
    }

    Loop *findLoop(QScriptNameIdImpl *name = 0);

    Loop *m_activeLoop;
    QMap<AST::Statement*, Loop> m_loops;
    CompilationUnit m_compilationUnit;
};

} // namespace QScript

#endif // QT_NO_SCRIPT

QT_END_NAMESPACE

#endif