1 | /* |
2 | * Copyright (C) 1999-2000 Harri Porten (porten@kde.org) |
3 | * Copyright (C) 2003, 2007, 2008 Apple Inc. All Rights Reserved. |
4 | * |
5 | * This library is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU Lesser General Public |
7 | * License as published by the Free Software Foundation; either |
8 | * version 2 of the License, or (at your option) any later version. |
9 | * |
10 | * This library is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | * Lesser General Public License for more details. |
14 | * |
15 | * You should have received a copy of the GNU Lesser General Public |
16 | * License along with this library; if not, write to the Free Software |
17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
18 | * |
19 | */ |
20 | |
21 | #ifndef RegExpConstructor_h |
22 | #define RegExpConstructor_h |
23 | |
24 | #include "InternalFunction.h" |
25 | #include "RegExp.h" |
26 | #include <wtf/OwnPtr.h> |
27 | |
28 | namespace JSC { |
29 | |
30 | class RegExp; |
31 | class RegExpPrototype; |
32 | struct RegExpConstructorPrivate; |
33 | |
34 | struct RegExpConstructorPrivate : FastAllocBase { |
35 | // Global search cache / settings |
36 | RegExpConstructorPrivate() |
37 | : lastNumSubPatterns(0) |
38 | , multiline(false) |
39 | , lastOvectorIndex(0) |
40 | { |
41 | } |
42 | |
43 | const Vector<int, 32>& lastOvector() const { return ovector[lastOvectorIndex]; } |
44 | Vector<int, 32>& lastOvector() { return ovector[lastOvectorIndex]; } |
45 | Vector<int, 32>& tempOvector() { return ovector[lastOvectorIndex ? 0 : 1]; } |
46 | void changeLastOvector() { lastOvectorIndex = lastOvectorIndex ? 0 : 1; } |
47 | |
48 | UString input; |
49 | UString lastInput; |
50 | Vector<int, 32> ovector[2]; |
51 | unsigned lastNumSubPatterns : 30; |
52 | bool multiline : 1; |
53 | unsigned lastOvectorIndex : 1; |
54 | }; |
55 | |
56 | class RegExpConstructor : public InternalFunction { |
57 | public: |
58 | RegExpConstructor(ExecState*, NonNullPassRefPtr<Structure>, RegExpPrototype*); |
59 | |
60 | static PassRefPtr<Structure> createStructure(JSValue prototype) |
61 | { |
62 | return Structure::create(prototype, typeInfo: TypeInfo(ObjectType, StructureFlags)); |
63 | } |
64 | |
65 | virtual void put(ExecState*, const Identifier& propertyName, JSValue, PutPropertySlot&); |
66 | virtual bool getOwnPropertySlot(ExecState*, const Identifier& propertyName, PropertySlot&); |
67 | virtual bool getOwnPropertyDescriptor(ExecState*, const Identifier&, PropertyDescriptor&); |
68 | |
69 | static const ClassInfo info; |
70 | |
71 | void performMatch(RegExp*, const UString&, int startOffset, int& position, int& length, int** ovector = 0); |
72 | JSObject* arrayOfMatches(ExecState*) const; |
73 | |
74 | void setInput(const UString&); |
75 | const UString& input() const; |
76 | |
77 | void setMultiline(bool); |
78 | bool multiline() const; |
79 | |
80 | JSValue getBackref(ExecState*, unsigned) const; |
81 | JSValue getLastParen(ExecState*) const; |
82 | JSValue getLeftContext(ExecState*) const; |
83 | JSValue getRightContext(ExecState*) const; |
84 | |
85 | protected: |
86 | static const unsigned StructureFlags = OverridesGetOwnPropertySlot | ImplementsHasInstance | InternalFunction::StructureFlags; |
87 | |
88 | private: |
89 | virtual ConstructType getConstructData(ConstructData&); |
90 | virtual CallType getCallData(CallData&); |
91 | |
92 | virtual const ClassInfo* classInfo() const { return &info; } |
93 | |
94 | OwnPtr<RegExpConstructorPrivate> d; |
95 | }; |
96 | |
97 | RegExpConstructor* asRegExpConstructor(JSValue); |
98 | |
99 | JSObject* constructRegExp(ExecState*, const ArgList&); |
100 | |
101 | inline RegExpConstructor* asRegExpConstructor(JSValue value) |
102 | { |
103 | ASSERT(asObject(value)->inherits(&RegExpConstructor::info)); |
104 | return static_cast<RegExpConstructor*>(asObject(value)); |
105 | } |
106 | |
107 | /* |
108 | To facilitate result caching, exec(), test(), match(), search(), and replace() dipatch regular |
109 | expression matching through the performMatch function. We use cached results to calculate, |
110 | e.g., RegExp.lastMatch and RegExp.leftParen. |
111 | */ |
112 | inline void RegExpConstructor::performMatch(RegExp* r, const UString& s, int startOffset, int& position, int& length, int** ovector) |
113 | { |
114 | position = r->match(s, startOffset, ovector: &d->tempOvector()); |
115 | |
116 | if (ovector) |
117 | *ovector = d->tempOvector().data(); |
118 | |
119 | if (position != -1) { |
120 | ASSERT(!d->tempOvector().isEmpty()); |
121 | |
122 | length = d->tempOvector()[1] - d->tempOvector()[0]; |
123 | |
124 | d->input = s; |
125 | d->lastInput = s; |
126 | d->changeLastOvector(); |
127 | d->lastNumSubPatterns = r->numSubpatterns(); |
128 | } |
129 | } |
130 | |
131 | } // namespace JSC |
132 | |
133 | #endif // RegExpConstructor_h |
134 | |