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/*
* 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 "Error.h"
#include "Executable.h"
#include "JITCode.h"
#include "JSFunction.h"
#include "JSGlobalObject.h"
#include "JSCInlines.h"
#include "StringPrototype.h"
namespace JSC {
static EncodedJSValue JSC_HOST_CALL stringFromCharCode(ExecState*);
static EncodedJSValue JSC_HOST_CALL stringFromCodePoint(ExecState*);
}
#include "StringConstructor.lut.h"
namespace JSC {
const ClassInfo StringConstructor::s_info = { "Function", &InternalFunction::s_info, &stringConstructorTable, CREATE_METHOD_TABLE(StringConstructor) };
/* Source for StringConstructor.lut.h
@begin stringConstructorTable
fromCharCode stringFromCharCode DontEnum|Function 1
fromCodePoint stringFromCodePoint DontEnum|Function 1
raw JSBuiltin DontEnum|Function 1
@end
*/
STATIC_ASSERT_IS_TRIVIALLY_DESTRUCTIBLE(StringConstructor);
StringConstructor::StringConstructor(VM& vm, Structure* structure)
: InternalFunction(vm, structure)
{
}
void StringConstructor::finishCreation(VM& vm, StringPrototype* stringPrototype)
{
Base::finishCreation(vm, stringPrototype->classInfo()->className);
putDirectWithoutTransition(vm, vm.propertyNames->prototype, stringPrototype, ReadOnly | DontEnum | DontDelete);
putDirectWithoutTransition(vm, vm.propertyNames->length, jsNumber(1), ReadOnly | DontEnum | DontDelete);
}
bool StringConstructor::getOwnPropertySlot(JSObject* object, ExecState* exec, PropertyName propertyName, PropertySlot &slot)
{
return getStaticFunctionSlot<InternalFunction>(exec, stringConstructorTable, jsCast<StringConstructor*>(object), propertyName, slot);
}
// ------------------------------ Functions --------------------------------
static NEVER_INLINE JSValue stringFromCharCodeSlowCase(ExecState* exec)
{
unsigned length = exec->argumentCount();
UChar* buf;
PassRefPtr<StringImpl> impl = StringImpl::createUninitialized(length, buf);
for (unsigned i = 0; i < length; ++i)
buf[i] = static_cast<UChar>(exec->uncheckedArgument(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->uncheckedArgument(0).toUInt32(exec)));
return JSValue::encode(stringFromCharCodeSlowCase(exec));
}
JSCell* JSC_HOST_CALL stringFromCharCode(ExecState* exec, int32_t arg)
{
return jsSingleCharacterString(exec, arg);
}
static EncodedJSValue JSC_HOST_CALL stringFromCodePoint(ExecState* exec)
{
unsigned length = exec->argumentCount();
StringBuilder builder;
builder.reserveCapacity(length);
for (unsigned i = 0; i < length; ++i) {
double codePointAsDouble = exec->uncheckedArgument(i).toNumber(exec);
if (exec->hadException())
return JSValue::encode(jsUndefined());
uint32_t codePoint = static_cast<uint32_t>(codePointAsDouble);
if (codePoint != codePointAsDouble || codePoint > UCHAR_MAX_VALUE)
return throwVMError(exec, createRangeError(exec, ASCIILiteral("Arguments contain a value that is out of range of code points")));
if (U_IS_BMP(codePoint))
builder.append(static_cast<UChar>(codePoint));
else {
builder.append(U16_LEAD(codePoint));
builder.append(U16_TRAIL(codePoint));
}
}
return JSValue::encode(jsString(exec, builder.toString()));
}
static EncodedJSValue JSC_HOST_CALL constructWithStringConstructor(ExecState* exec)
{
JSGlobalObject* globalObject = asInternalFunction(exec->callee())->globalObject();
VM& vm = exec->vm();
if (!exec->argumentCount())
return JSValue::encode(StringObject::create(vm, InternalFunction::createSubclassStructure(exec, exec->newTarget(), globalObject->stringObjectStructure())));
return JSValue::encode(StringObject::create(vm, InternalFunction::createSubclassStructure(exec, exec->newTarget(), globalObject->stringObjectStructure()), exec->uncheckedArgument(0).toString(exec)));
}
ConstructType StringConstructor::getConstructData(JSCell*, ConstructData& constructData)
{
constructData.native.function = constructWithStringConstructor;
return ConstructTypeHost;
}
JSCell* stringConstructor(ExecState* exec, JSValue argument)
{
if (argument.isSymbol())
return jsNontrivialString(exec, asSymbol(argument)->descriptiveString());
return argument.toString(exec);
}
static EncodedJSValue JSC_HOST_CALL callStringConstructor(ExecState* exec)
{
if (!exec->argumentCount())
return JSValue::encode(jsEmptyString(exec));
return JSValue::encode(stringConstructor(exec, exec->uncheckedArgument(0)));
}
CallType StringConstructor::getCallData(JSCell*, CallData& callData)
{
callData.native.function = callStringConstructor;
return CallTypeHost;
}
} // namespace JSC
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