/*

 *  Copyright (C) 1999-2001 Harri Porten (porten@kde.org)

 *  Copyright (C) 2004, 2005, 2006, 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 Lesser 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

 *  Lesser General Public License for more details.

 *

 *  You should have received a copy of the GNU Lesser General Public

 *  License along with this library; if not, write to the Free Software

 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

 *

 */

#include "config.h"

#include "StringConstructor.h"

#include "Executable.h"

#include "JITCode.h"

#include "JSFunction.h"

#include "JSGlobalObject.h"

#include "PrototypeFunction.h"

#include "StringPrototype.h"

namespace JSC {

static NEVER_INLINE JSValue stringFromCharCodeSlowCase(ExecState* exec)

{

    unsigned length = exec->argumentCount();

    UChar* buf;

    PassRefPtr<UStringImpl> impl = UStringImpl::createUninitialized(length, buf);

    for (unsigned i = 0; i < length; ++i)

        buf[i] = static_cast<UChar>(exec->argument(i).toUInt32(exec));

    return jsString(exec, impl);

}

static EncodedJSValue JSC_HOST_CALL stringFromCharCode(ExecState* exec)

{

    if (LIKELY(exec->argumentCount() == 1))

        return JSValue::encode(jsSingleCharacterString(exec, exec->argument(0).toUInt32(exec)));

    return JSValue::encode(stringFromCharCodeSlowCase(exec));

}

ASSERT_CLASS_FITS_IN_CELL(StringConstructor);

StringConstructor::StringConstructor(ExecState* exec, JSGlobalObject* globalObject, NonNullPassRefPtr<Structure> structure, Structure* prototypeFunctionStructure, StringPrototype* stringPrototype)

    : InternalFunction(&exec->globalData(), globalObject, structure, Identifier(exec, stringPrototype->classInfo()->className))

{

    // ECMA 15.5.3.1 String.prototype

    putDirectWithoutTransition(exec->propertyNames().prototype, stringPrototype, ReadOnly | DontEnum | DontDelete);

    // ECMA 15.5.3.2 fromCharCode()

#if ENABLE(JIT) && ENABLE(JIT_OPTIMIZE_NATIVE_CALL)

    putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, globalObject, prototypeFunctionStructure, 1, exec->propertyNames().fromCharCode, exec->globalData().getHostFunction(stringFromCharCode, fromCharCodeThunkGenerator)), DontEnum);

#else

    putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, globalObject, prototypeFunctionStructure, 1, exec->propertyNames().fromCharCode, stringFromCharCode), DontEnum);

#endif

    // no. of arguments for constructor

    putDirectWithoutTransition(exec->propertyNames().length, jsNumber(exec, 1), ReadOnly | DontEnum | DontDelete);

}

// ECMA 15.5.2

static EncodedJSValue JSC_HOST_CALL constructWithStringConstructor(ExecState* exec)

{

    if (!exec->argumentCount())

        return JSValue::encode(new (exec) StringObject(exec, exec->lexicalGlobalObject()->stringObjectStructure()));

    return JSValue::encode(new (exec) StringObject(exec, exec->lexicalGlobalObject()->stringObjectStructure(), exec->argument(0).toString(exec)));

}

ConstructType StringConstructor::getConstructData(ConstructData& constructData)

{

    constructData.native.function = constructWithStringConstructor;

    return ConstructTypeHost;

}

// ECMA 15.5.1

static EncodedJSValue JSC_HOST_CALL callStringConstructor(ExecState* exec)

{

    if (!exec->argumentCount())

        return JSValue::encode(jsEmptyString(exec));

    return JSValue::encode(jsString(exec, exec->argument(0).toString(exec)));

}

CallType StringConstructor::getCallData(CallData& callData)

{

    callData.native.function = callStringConstructor;

    return CallTypeHost;

}

} // namespace JSC