Code drop from //branches/cupcake/...@124589

1 files changed, 267 insertions, 0 deletions

diff --git a/JavaScriptCore/runtime/JSNumberCell.h b/JavaScriptCore/runtime/JSNumberCell.h
new file mode 100644
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--- /dev/null
+++ b/JavaScriptCore/runtime/JSNumberCell.h
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+/*
+ *  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 JSNumberCell_h
+#define JSNumberCell_h
+
+#include "ExecState.h"
+#include "JSCell.h"
+#include "JSImmediate.h"
+#include "collector.h"
+#include "ustring.h"
+#include <stddef.h> // for size_t
+
+namespace JSC {
+
+    class Identifier;
+    class JSCell;
+    class JSObject;
+    class JSString;
+    class PropertySlot;
+
+    struct ClassInfo;
+    struct Instruction;
+
+    class JSNumberCell : public JSCell {
+        friend class CTI;
+        friend JSValue* jsNumberCell(JSGlobalData*, double);
+        friend JSValue* jsNaN(JSGlobalData*);
+        friend JSValue* jsNumberCell(ExecState*, double);
+        friend JSValue* jsNaN(ExecState*);
+    public:
+        double value() const { return m_value; }
+
+        virtual JSValue* toPrimitive(ExecState*, PreferredPrimitiveType) const;
+        virtual bool getPrimitiveNumber(ExecState*, double& number, JSValue*& value);
+        virtual bool toBoolean(ExecState*) const;
+        virtual double toNumber(ExecState*) const;
+        virtual UString toString(ExecState*) const;
+        virtual JSObject* toObject(ExecState*) const;
+
+        virtual UString toThisString(ExecState*) const;
+        virtual JSObject* toThisObject(ExecState*) const;
+        virtual JSValue* getJSNumber();
+
+        int32_t toInt32() const;
+        uint32_t toUInt32() const;
+
+        void* operator new(size_t size, ExecState* exec)
+        {
+    #ifdef JAVASCRIPTCORE_BUILDING_ALL_IN_ONE_FILE
+            return exec->heap()->inlineAllocateNumber(size);
+    #else
+            return exec->heap()->allocateNumber(size);
+    #endif
+        }
+
+        void* operator new(size_t size, JSGlobalData* globalData)
+        {
+    #ifdef JAVASCRIPTCORE_BUILDING_ALL_IN_ONE_FILE
+            return globalData->heap.inlineAllocateNumber(size);
+    #else
+            return globalData->heap.allocateNumber(size);
+    #endif
+        }
+
+        static PassRefPtr<StructureID> createStructureID(JSValue* proto) { return StructureID::create(proto, TypeInfo(NumberType, NeedsThisConversion)); }
+
+        JSNumberCell(JSGlobalData* globalData)
+        : JSCell(globalData->numberStructureID.get())
+        {
+        }
+
+    private:
+        JSNumberCell(JSGlobalData* globalData, double value)
+            : JSCell(globalData->numberStructureID.get())
+            , m_value(value)
+        {
+        }
+
+        JSNumberCell(ExecState* exec, double value)
+            : JSCell(exec->globalData().numberStructureID.get())
+            , m_value(value)
+        {
+        }
+
+        virtual bool getUInt32(uint32_t&) const;
+        virtual bool getTruncatedInt32(int32_t&) const;
+        virtual bool getTruncatedUInt32(uint32_t&) const;
+
+        double m_value;
+    };
+
+    extern const double NaN;
+    extern const double Inf;
+
+    JSNumberCell* asNumberCell(JSValue*);
+
+    JSValue* jsNumberCell(JSGlobalData*, double);
+    JSValue* jsNaN(JSGlobalData*);
+    JSValue* jsNumberCell(ExecState*, double);
+    JSValue* jsNaN(ExecState*);
+
+    inline JSNumberCell* asNumberCell(JSValue* value)
+    {
+        ASSERT(asCell(value)->isNumber());
+        return static_cast<JSNumberCell*>(asCell(value));
+    }
+
+    ALWAYS_INLINE JSValue* jsNumber(ExecState* exec, double d)
+    {
+        JSValue* v = JSImmediate::from(d);
+        return v ? v : jsNumberCell(exec, d);
+    }
+
+    ALWAYS_INLINE JSValue* jsNumber(ExecState* exec, short i)
+    {
+        JSValue* v = JSImmediate::from(i);
+        return v ? v : jsNumberCell(exec, i);
+    }
+
+    ALWAYS_INLINE JSValue* jsNumber(ExecState* exec, unsigned short i)
+    {
+        JSValue* v = JSImmediate::from(i);
+        return v ? v : jsNumberCell(exec, i);
+    }
+
+    ALWAYS_INLINE JSValue* jsNumber(ExecState* exec, int i)
+    {
+        JSValue* v = JSImmediate::from(i);
+        return v ? v : jsNumberCell(exec, i);
+    }
+
+    ALWAYS_INLINE JSValue* jsNumber(ExecState* exec, unsigned i)
+    {
+        JSValue* v = JSImmediate::from(i);
+        return v ? v : jsNumberCell(exec, i);
+    }
+
+    ALWAYS_INLINE JSValue* jsNumber(ExecState* exec, long i)
+    {
+        JSValue* v = JSImmediate::from(i);
+        return v ? v : jsNumberCell(exec, i);
+    }
+
+    ALWAYS_INLINE JSValue* jsNumber(ExecState* exec, unsigned long i)
+    {
+        JSValue* v = JSImmediate::from(i);
+        return v ? v : jsNumberCell(exec, i);
+    }
+
+    ALWAYS_INLINE JSValue* jsNumber(ExecState* exec, long long i)
+    {
+        JSValue* v = JSImmediate::from(i);
+        return v ? v : jsNumberCell(exec, static_cast<double>(i));
+    }
+
+    ALWAYS_INLINE JSValue* jsNumber(ExecState* exec, unsigned long long i)
+    {
+        JSValue* v = JSImmediate::from(i);
+        return v ? v : jsNumberCell(exec, static_cast<double>(i));
+    }
+
+    ALWAYS_INLINE JSValue* jsNumber(JSGlobalData* globalData, double d)
+    {
+        JSValue* v = JSImmediate::from(d);
+        return v ? v : jsNumberCell(globalData, d);
+    }
+
+    ALWAYS_INLINE JSValue* jsNumber(JSGlobalData* globalData, short i)
+    {
+        JSValue* v = JSImmediate::from(i);
+        return v ? v : jsNumberCell(globalData, i);
+    }
+
+    ALWAYS_INLINE JSValue* jsNumber(JSGlobalData* globalData, unsigned short i)
+    {
+        JSValue* v = JSImmediate::from(i);
+        return v ? v : jsNumberCell(globalData, i);
+    }
+
+    ALWAYS_INLINE JSValue* jsNumber(JSGlobalData* globalData, int i)
+    {
+        JSValue* v = JSImmediate::from(i);
+        return v ? v : jsNumberCell(globalData, i);
+    }
+
+    ALWAYS_INLINE JSValue* jsNumber(JSGlobalData* globalData, unsigned i)
+    {
+        JSValue* v = JSImmediate::from(i);
+        return v ? v : jsNumberCell(globalData, i);
+    }
+
+    ALWAYS_INLINE JSValue* jsNumber(JSGlobalData* globalData, long i)
+    {
+        JSValue* v = JSImmediate::from(i);
+        return v ? v : jsNumberCell(globalData, i);
+    }
+
+    ALWAYS_INLINE JSValue* jsNumber(JSGlobalData* globalData, unsigned long i)
+    {
+        JSValue* v = JSImmediate::from(i);
+        return v ? v : jsNumberCell(globalData, i);
+    }
+
+    ALWAYS_INLINE JSValue* jsNumber(JSGlobalData* globalData, long long i)
+    {
+        JSValue* v = JSImmediate::from(i);
+        return v ? v : jsNumberCell(globalData, static_cast<double>(i));
+    }
+
+    ALWAYS_INLINE JSValue* jsNumber(JSGlobalData* globalData, unsigned long long i)
+    {
+        JSValue* v = JSImmediate::from(i);
+        return v ? v : jsNumberCell(globalData, static_cast<double>(i));
+    }
+
+    // --- JSValue inlines ----------------------------
+
+    inline double JSValue::uncheckedGetNumber() const
+    {
+        ASSERT(JSImmediate::isImmediate(asValue()) || asCell()->isNumber());
+        return JSImmediate::isImmediate(asValue()) ? JSImmediate::toDouble(asValue()) : asNumberCell(asValue())->value();
+    }
+
+    inline int32_t JSNumberCell::toInt32() const
+    {
+        if (m_value >= -2147483648.0 && m_value < 2147483648.0)
+            return static_cast<int32_t>(m_value);
+        bool scratch;
+        return JSC::toInt32SlowCase(m_value, scratch);
+    }
+
+    inline uint32_t JSNumberCell::toUInt32() const
+    {
+        if (m_value >= 0.0 && m_value < 4294967296.0)
+            return static_cast<uint32_t>(m_value);
+        bool scratch;
+        return JSC::toUInt32SlowCase(m_value, scratch);
+    }
+
+    ALWAYS_INLINE JSValue* JSValue::toJSNumber(ExecState* exec) const
+    {
+        return JSImmediate::isNumber(asValue()) ? asValue() : jsNumber(exec, this->toNumber(exec));
+    }
+
+} // namespace JSC
+
+#endif // JSNumberCell_h