--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/webengine/osswebengine/JavaScriptCore/kjs/function.h Mon Mar 30 12:54:55 2009 +0300
@@ -0,0 +1,246 @@
+// -*- c-basic-offset: 2 -*-
+/*
+ * This file is part of the KDE libraries
+ * Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
+ * Copyright (C) 2003, 2006 Apple Computer, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef KJS_FUNCTION_H
+#define KJS_FUNCTION_H
+
+#include "object.h"
+#include <wtf/OwnPtr.h>
+#include <wtf/Vector.h>
+
+namespace KJS {
+
+ class ActivationImp;
+ class FunctionBodyNode;
+ class FunctionPrototype;
+
+ enum CodeType { GlobalCode,
+ EvalCode,
+ FunctionCode,
+ AnonymousCode };
+
+ class InternalFunctionImp : public JSObject {
+ public:
+ InternalFunctionImp();
+ IMPORT InternalFunctionImp(FunctionPrototype*, const Identifier&);
+
+ IMPORT virtual bool implementsCall() const;
+ virtual JSValue* callAsFunction(ExecState*, JSObject* thisObjec, const List& args) = 0;
+ IMPORT virtual bool implementsHasInstance() const;
+
+#if PLATFORM(SYMBIAN)
+// compiler issue
+ IMPORT virtual const ClassInfo* classInfo() const;
+#else
+ virtual const ClassInfo* classInfo() const { return &info; }
+#endif
+ static const ClassInfo info;
+ const Identifier& functionName() const { return m_name; }
+
+ private:
+ Identifier m_name;
+ };
+
+ /**
+ * @internal
+ *
+ * The initial value of Function.prototype (and thus all objects created
+ * with the Function constructor)
+ */
+ class FunctionPrototype : public InternalFunctionImp {
+ public:
+ FunctionPrototype(ExecState *exec);
+ virtual ~FunctionPrototype();
+
+ virtual JSValue *callAsFunction(ExecState *exec, JSObject *thisObj, const List &args);
+ };
+
+ /**
+ * @short Implementation class for internal Functions.
+ */
+ class FunctionImp : public InternalFunctionImp {
+ friend class ActivationImp;
+ public:
+ FunctionImp(ExecState*, const Identifier& n, FunctionBodyNode* b);
+ virtual ~FunctionImp();
+
+ virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&);
+ virtual void put(ExecState*, const Identifier& propertyName, JSValue* value, int attr = None);
+ virtual bool deleteProperty(ExecState*, const Identifier& propertyName);
+
+ virtual JSValue* callAsFunction(ExecState*, JSObject* thisObj, const List& args);
+
+ // Note: unlike body->paramName, this returns Identifier::null for parameters
+ // that will never get set, due to later param having the same name
+ Identifier getParameterName(int index);
+ virtual CodeType codeType() const = 0;
+
+ virtual Completion execute(ExecState*) = 0;
+
+ virtual const ClassInfo* classInfo() const { return &info; }
+ static const ClassInfo info;
+
+ RefPtr<FunctionBodyNode> body;
+
+ /**
+ * Returns the scope of this object. This is used when execution declared
+ * functions - the execution context for the function is initialized with
+ * extra object in it's scope. An example of this is functions declared
+ * inside other functions:
+ *
+ * \code
+ * function f() {
+ *
+ * function b() {
+ * return prototype;
+ * }
+ *
+ * var x = 4;
+ * // do some stuff
+ * }
+ * f.prototype = new String();
+ * \endcode
+ *
+ * When the function f.b is executed, its scope will include properties of
+ * f. So in the example above the return value of f.b() would be the new
+ * String object that was assigned to f.prototype.
+ *
+ * @param exec The current execution state
+ * @return The function's scope
+ */
+ const ScopeChain& scope() const { return _scope; }
+ void setScope(const ScopeChain& s) { _scope = s; }
+
+ virtual void mark();
+
+ private:
+ ScopeChain _scope;
+
+ static JSValue* argumentsGetter(ExecState*, JSObject*, const Identifier&, const PropertySlot&);
+ static JSValue* callerGetter(ExecState*, JSObject*, const Identifier&, const PropertySlot&);
+ static JSValue* lengthGetter(ExecState*, JSObject*, const Identifier&, const PropertySlot&);
+
+ void passInParameters(ExecState*, const List&);
+ virtual void processVarDecls(ExecState*);
+ };
+
+ class DeclaredFunctionImp : public FunctionImp {
+ public:
+ DeclaredFunctionImp(ExecState*, const Identifier& n,
+ FunctionBodyNode* b, const ScopeChain& sc);
+
+ bool implementsConstruct() const;
+ JSObject* construct(ExecState*, const List& args);
+
+ virtual Completion execute(ExecState*);
+ CodeType codeType() const { return FunctionCode; }
+
+ virtual const ClassInfo* classInfo() const { return &info; }
+ static const ClassInfo info;
+
+ private:
+ virtual void processVarDecls(ExecState*);
+ };
+
+ class IndexToNameMap {
+ public:
+ IndexToNameMap(FunctionImp* func, const List& args);
+ ~IndexToNameMap();
+
+ Identifier& operator[](int index);
+ Identifier& operator[](const Identifier &indexIdentifier);
+ bool isMapped(const Identifier& index) const;
+ void unMap(const Identifier& index);
+
+ private:
+ IndexToNameMap(); // prevent construction w/o parameters
+ int size;
+ Identifier* _map;
+ };
+
+ class Arguments : public JSObject {
+ public:
+ Arguments(ExecState*, FunctionImp* func, const List& args, ActivationImp* act);
+ virtual void mark();
+ virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&);
+ virtual void put(ExecState*, const Identifier& propertyName, JSValue* value, int attr = None);
+ virtual bool deleteProperty(ExecState*, const Identifier& propertyName);
+ virtual const ClassInfo* classInfo() const { return &info; }
+ static const ClassInfo info;
+ private:
+ static JSValue* mappedIndexGetter(ExecState*, JSObject*, const Identifier&, const PropertySlot& slot);
+
+ ActivationImp* _activationObject;
+ mutable IndexToNameMap indexToNameMap;
+ };
+
+ class ActivationImp : public JSObject {
+ public:
+ ActivationImp(FunctionImp* function, const List& arguments);
+
+ virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&);
+ virtual void put(ExecState*, const Identifier& propertyName, JSValue* value, int attr = None);
+ virtual bool deleteProperty(ExecState*, const Identifier& propertyName);
+
+ virtual const ClassInfo* classInfo() const { return &info; }
+ static const ClassInfo info;
+
+ virtual void mark();
+
+ bool isActivation() { return true; }
+
+ void releaseArguments() { _arguments.reset(); }
+
+ private:
+ static PropertySlot::GetValueFunc getArgumentsGetter();
+ static JSValue* argumentsGetter(ExecState*, JSObject*, const Identifier&, const PropertySlot& slot);
+ void createArgumentsObject(ExecState*);
+
+ FunctionImp* _function;
+ List _arguments;
+ mutable Arguments* _argumentsObject;
+ };
+
+ class GlobalFuncImp : public InternalFunctionImp {
+ public:
+ GlobalFuncImp(ExecState*, FunctionPrototype*, int i, int len, const Identifier&);
+ virtual JSValue* callAsFunction(ExecState*, JSObject* thisObj, const List& args);
+ virtual CodeType codeType() const;
+ enum { Eval, ParseInt, ParseFloat, IsNaN, IsFinite, Escape, UnEscape,
+ DecodeURI, DecodeURIComponent, EncodeURI, EncodeURIComponent
+#ifndef NDEBUG
+ , KJSPrint
+#endif
+};
+ private:
+ int id;
+ };
+
+ static const double mantissaOverflowLowerBound = 9007199254740992.0;
+ double parseIntOverflow(const char* s, int length, int radix);
+
+UString escapeStringForPrettyPrinting(const UString& s);
+
+} // namespace
+
+#endif