source: webkit/trunk/JavaScriptCore/kjs/StringObject.h@ 36462

Last change on this file since 36462 was 36462, checked in by [email protected], 17 years ago

2008-09-15 Gavin Barraclough <​[email protected]>

Reviewed by Geoff Garen.

Inline code generation of eq_null/neq_null for CTI. Uses vptr checking for
StringObjectsThatAreMasqueradingAsBeingUndefined. In the long run, the
masquerading may be handled differently (through the StructureIDs - see bug
#20823).

1% on v8-tests.

  • VM/CTI.cpp: (JSC::CTI::emitJumpSlowCaseIfIsJSCell): (JSC::CTI::privateCompileMainPass): (JSC::CTI::privateCompileSlowCases):
  • VM/CTI.h:
  • VM/Machine.cpp: (JSC::Machine::Machine): (JSC::Machine::cti_op_eq_null): (JSC::Machine::cti_op_neq_null):
  • VM/Machine.h: (JSC::Machine::doesMasqueradesAsUndefined):
  • kjs/JSWrapperObject.h: (JSC::JSWrapperObject::): (JSC::JSWrapperObject::JSWrapperObject):
  • kjs/StringObject.h: (JSC::StringObject::StringObject):
  • kjs/StringObjectThatMasqueradesAsUndefined.h: (JSC::StringObjectThatMasqueradesAsUndefined::StringObjectThatMasqueradesAsUndefined):
  • Property svn:eol-style set to native
File size: 2.3 KB
Line 
1/*
2 * Copyright (C) 1999-2000 Harri Porten ([email protected])
3 * Copyright (C) 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 StringObject_h
22#define StringObject_h
23
24#include "JSWrapperObject.h"
25#include "JSString.h"
26
27namespace JSC {
28
29 class StringObject : public JSWrapperObject {
30 public:
31 StringObject(VPtrStealingHackType type)
32 : JSWrapperObject(type)
33 {
34 }
35 StringObject(ExecState*, JSObject* prototype);
36 StringObject(ExecState*, JSObject* prototype, const UString&);
37
38 static StringObject* create(ExecState*, JSString*);
39
40 virtual bool getOwnPropertySlot(ExecState*, const Identifier& propertyName, PropertySlot&);
41 virtual bool getOwnPropertySlot(ExecState*, unsigned propertyName, PropertySlot&);
42
43 virtual void put(ExecState* exec, const Identifier& propertyName, JSValue*, PutPropertySlot&);
44 virtual bool deleteProperty(ExecState*, const Identifier& propertyName);
45 virtual void getPropertyNames(ExecState*, PropertyNameArray&);
46
47 virtual const ClassInfo* classInfo() const { return &info; }
48 static const ClassInfo info;
49
50 JSString* internalValue() const { return static_cast<JSString*>(JSWrapperObject::internalValue());}
51
52 protected:
53 StringObject(JSObject* prototype, JSString*);
54
55 private:
56 virtual UString toString(ExecState*) const;
57 virtual UString toThisString(ExecState*) const;
58 virtual JSString* toThisJSString(ExecState*);
59 };
60
61} // namespace JSC
62
63#endif // StringObject_h
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