| /* |
| * Copyright (C) 1999-2001 Harri Porten (porten@kde.org) |
| * Copyright (C) 2001 Peter Kelly (pmk@post.com) |
| * Copyright (C) 2003, 2004, 2005, 2007, 2008 Apple Inc. All rights reserved. |
| * |
| * 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 JSCell_h |
| #define JSCell_h |
| |
| #include <wtf/Noncopyable.h> |
| #include "Structure.h" |
| #include "JSValue.h" |
| #include "JSImmediate.h" |
| #include "Collector.h" |
| |
| namespace JSC { |
| |
| class JSCell : Noncopyable { |
| friend class GetterSetter; |
| friend class Heap; |
| friend class JIT; |
| friend class JSNumberCell; |
| friend class JSObject; |
| friend class JSPropertyNameIterator; |
| friend class JSString; |
| friend class JSValue; |
| friend class JSAPIValueWrapper; |
| friend struct VPtrSet; |
| |
| private: |
| explicit JSCell(Structure*); |
| virtual ~JSCell(); |
| |
| public: |
| // Querying the type. |
| #if USE(JSVALUE32) |
| bool isNumber() const; |
| #endif |
| bool isString() const; |
| bool isObject() const; |
| virtual bool isGetterSetter() const; |
| virtual bool isObject(const ClassInfo*) const; |
| virtual bool isAPIValueWrapper() const { return false; } |
| |
| Structure* structure() const; |
| |
| // Extracting the value. |
| bool getString(UString&) const; |
| UString getString() const; // null string if not a string |
| JSObject* getObject(); // NULL if not an object |
| const JSObject* getObject() const; // NULL if not an object |
| |
| virtual CallType getCallData(CallData&); |
| virtual ConstructType getConstructData(ConstructData&); |
| |
| // Extracting integer values. |
| // FIXME: remove these methods, can check isNumberCell in JSValue && then call asNumberCell::*. |
| virtual bool getUInt32(uint32_t&) const; |
| |
| // Basic conversions. |
| virtual JSValue toPrimitive(ExecState*, PreferredPrimitiveType) const = 0; |
| virtual bool getPrimitiveNumber(ExecState*, double& number, JSValue&) = 0; |
| virtual bool toBoolean(ExecState*) const = 0; |
| virtual double toNumber(ExecState*) const = 0; |
| virtual UString toString(ExecState*) const = 0; |
| virtual JSObject* toObject(ExecState*) const = 0; |
| |
| // Garbage collection. |
| void* operator new(size_t, ExecState*); |
| void* operator new(size_t, JSGlobalData*); |
| void* operator new(size_t, void* placementNewDestination) { return placementNewDestination; } |
| virtual void mark(); |
| bool marked() const; |
| |
| // Object operations, with the toObject operation included. |
| virtual const ClassInfo* classInfo() const; |
| virtual void put(ExecState*, const Identifier& propertyName, JSValue, PutPropertySlot&); |
| virtual void put(ExecState*, unsigned propertyName, JSValue); |
| virtual bool deleteProperty(ExecState*, const Identifier& propertyName); |
| virtual bool deleteProperty(ExecState*, unsigned propertyName); |
| |
| virtual JSObject* toThisObject(ExecState*) const; |
| virtual UString toThisString(ExecState*) const; |
| virtual JSString* toThisJSString(ExecState*); |
| virtual JSValue getJSNumber(); |
| void* vptr() { return *reinterpret_cast<void**>(this); } |
| |
| private: |
| // Base implementation; for non-object classes implements getPropertySlot. |
| bool fastGetOwnPropertySlot(ExecState*, const Identifier& propertyName, PropertySlot&); |
| virtual bool getOwnPropertySlot(ExecState*, const Identifier& propertyName, PropertySlot&); |
| virtual bool getOwnPropertySlot(ExecState*, unsigned propertyName, PropertySlot&); |
| |
| Structure* m_structure; |
| }; |
| |
| JSCell* asCell(JSValue); |
| |
| inline JSCell* asCell(JSValue value) |
| { |
| return value.asCell(); |
| } |
| |
| inline JSCell::JSCell(Structure* structure) |
| : m_structure(structure) |
| { |
| } |
| |
| inline JSCell::~JSCell() |
| { |
| } |
| |
| #if USE(JSVALUE32) |
| inline bool JSCell::isNumber() const |
| { |
| return Heap::isNumber(const_cast<JSCell*>(this)); |
| } |
| #endif |
| |
| inline bool JSCell::isObject() const |
| { |
| return m_structure->typeInfo().type() == ObjectType; |
| } |
| |
| inline bool JSCell::isString() const |
| { |
| return m_structure->typeInfo().type() == StringType; |
| } |
| |
| inline Structure* JSCell::structure() const |
| { |
| return m_structure; |
| } |
| |
| inline bool JSCell::marked() const |
| { |
| return Heap::isCellMarked(this); |
| } |
| |
| inline void JSCell::mark() |
| { |
| return Heap::markCell(this); |
| } |
| |
| inline void* JSCell::operator new(size_t size, JSGlobalData* globalData) |
| { |
| #ifdef JAVASCRIPTCORE_BUILDING_ALL_IN_ONE_FILE |
| return globalData->heap.inlineAllocate(size); |
| #else |
| return globalData->heap.allocate(size); |
| #endif |
| } |
| |
| // --- JSValue inlines ---------------------------- |
| |
| inline bool JSValue::isString() const |
| { |
| return isCell() && asCell()->isString(); |
| } |
| |
| inline bool JSValue::isGetterSetter() const |
| { |
| return isCell() && asCell()->isGetterSetter(); |
| } |
| |
| inline bool JSValue::isObject() const |
| { |
| return isCell() && asCell()->isObject(); |
| } |
| |
| inline bool JSValue::getString(UString& s) const |
| { |
| return isCell() && asCell()->getString(s); |
| } |
| |
| inline UString JSValue::getString() const |
| { |
| return isCell() ? asCell()->getString() : UString(); |
| } |
| |
| inline JSObject* JSValue::getObject() const |
| { |
| return isCell() ? asCell()->getObject() : 0; |
| } |
| |
| inline CallType JSValue::getCallData(CallData& callData) |
| { |
| return isCell() ? asCell()->getCallData(callData) : CallTypeNone; |
| } |
| |
| inline ConstructType JSValue::getConstructData(ConstructData& constructData) |
| { |
| return isCell() ? asCell()->getConstructData(constructData) : ConstructTypeNone; |
| } |
| |
| ALWAYS_INLINE bool JSValue::getUInt32(uint32_t& v) const |
| { |
| if (isInt32()) { |
| int32_t i = asInt32(); |
| v = static_cast<uint32_t>(i); |
| return i >= 0; |
| } |
| if (isDouble()) { |
| double d = asDouble(); |
| v = static_cast<uint32_t>(d); |
| return v == d; |
| } |
| return false; |
| } |
| |
| inline void JSValue::mark() |
| { |
| asCell()->mark(); // callers should check !marked() before calling mark(), so this should only be called with cells |
| } |
| |
| inline bool JSValue::marked() const |
| { |
| return !isCell() || asCell()->marked(); |
| } |
| |
| #if !USE(JSVALUE32_64) |
| ALWAYS_INLINE JSCell* JSValue::asCell() const |
| { |
| ASSERT(isCell()); |
| return m_ptr; |
| } |
| #endif // !USE(JSVALUE32_64) |
| |
| inline JSValue JSValue::toPrimitive(ExecState* exec, PreferredPrimitiveType preferredType) const |
| { |
| return isCell() ? asCell()->toPrimitive(exec, preferredType) : asValue(); |
| } |
| |
| inline bool JSValue::getPrimitiveNumber(ExecState* exec, double& number, JSValue& value) |
| { |
| if (isInt32()) { |
| number = asInt32(); |
| value = *this; |
| return true; |
| } |
| if (isDouble()) { |
| number = asDouble(); |
| value = *this; |
| return true; |
| } |
| if (isCell()) |
| return asCell()->getPrimitiveNumber(exec, number, value); |
| if (isTrue()) { |
| number = 1.0; |
| value = *this; |
| return true; |
| } |
| if (isFalse() || isNull()) { |
| number = 0.0; |
| value = *this; |
| return true; |
| } |
| ASSERT(isUndefined()); |
| number = nonInlineNaN(); |
| value = *this; |
| return true; |
| } |
| |
| inline bool JSValue::toBoolean(ExecState* exec) const |
| { |
| if (isInt32()) |
| return asInt32() != 0; |
| if (isDouble()) |
| return asDouble() > 0.0 || asDouble() < 0.0; // false for NaN |
| if (isCell()) |
| return asCell()->toBoolean(exec); |
| return isTrue(); // false, null, and undefined all convert to false. |
| } |
| |
| ALWAYS_INLINE double JSValue::toNumber(ExecState* exec) const |
| { |
| if (isInt32()) |
| return asInt32(); |
| if (isDouble()) |
| return asDouble(); |
| if (isCell()) |
| return asCell()->toNumber(exec); |
| if (isTrue()) |
| return 1.0; |
| return isUndefined() ? nonInlineNaN() : 0; // null and false both convert to 0. |
| } |
| |
| inline UString JSValue::toString(ExecState* exec) const |
| { |
| if (isCell()) |
| return asCell()->toString(exec); |
| if (isInt32()) |
| return UString::from(asInt32()); |
| if (isDouble()) |
| return asDouble() == 0.0 ? "0" : UString::from(asDouble()); |
| if (isTrue()) |
| return "true"; |
| if (isFalse()) |
| return "false"; |
| if (isNull()) |
| return "null"; |
| ASSERT(isUndefined()); |
| return "undefined"; |
| } |
| |
| inline bool JSValue::needsThisConversion() const |
| { |
| if (UNLIKELY(!isCell())) |
| return true; |
| return asCell()->structure()->typeInfo().needsThisConversion(); |
| } |
| |
| inline UString JSValue::toThisString(ExecState* exec) const |
| { |
| return isCell() ? asCell()->toThisString(exec) : toString(exec); |
| } |
| |
| inline JSValue JSValue::getJSNumber() |
| { |
| if (isInt32() || isDouble()) |
| return *this; |
| if (isCell()) |
| return asCell()->getJSNumber(); |
| return JSValue(); |
| } |
| |
| inline JSObject* JSValue::toObject(ExecState* exec) const |
| { |
| return isCell() ? asCell()->toObject(exec) : toObjectSlowCase(exec); |
| } |
| |
| inline JSObject* JSValue::toThisObject(ExecState* exec) const |
| { |
| return isCell() ? asCell()->toThisObject(exec) : toThisObjectSlowCase(exec); |
| } |
| |
| } // namespace JSC |
| |
| #endif // JSCell_h |
