StringConstructor.cpp [plain text]
#include "config.h"
#include "StringConstructor.h"
#include "Executable.h"
#include "JITCode.h"
#include "JSFunction.h"
#include "JSGlobalObject.h"
#include "Operations.h"
#include "StringPrototype.h"
namespace JSC {
static EncodedJSValue JSC_HOST_CALL stringFromCharCode(ExecState*);
}
#include "StringConstructor.lut.h"
namespace JSC {
const ClassInfo StringConstructor::s_info = { "Function", &InternalFunction::s_info, 0, ExecState::stringConstructorTable, CREATE_METHOD_TABLE(StringConstructor) };
ASSERT_HAS_TRIVIAL_DESTRUCTOR(StringConstructor);
StringConstructor::StringConstructor(JSGlobalObject* globalObject, Structure* structure)
: InternalFunction(globalObject, structure)
{
}
void StringConstructor::finishCreation(ExecState* exec, StringPrototype* stringPrototype)
{
Base::finishCreation(exec->vm(), stringPrototype->classInfo()->className);
putDirectWithoutTransition(exec->vm(), exec->propertyNames().prototype, stringPrototype, ReadOnly | DontEnum | DontDelete);
putDirectWithoutTransition(exec->vm(), exec->propertyNames().length, jsNumber(1), ReadOnly | DontEnum | DontDelete);
}
bool StringConstructor::getOwnPropertySlot(JSCell* cell, ExecState* exec, PropertyName propertyName, PropertySlot &slot)
{
return getStaticFunctionSlot<InternalFunction>(exec, ExecState::stringConstructorTable(exec), jsCast<StringConstructor*>(cell), propertyName, slot);
}
bool StringConstructor::getOwnPropertyDescriptor(JSObject* object, ExecState* exec, PropertyName propertyName, PropertyDescriptor& descriptor)
{
return getStaticFunctionDescriptor<InternalFunction>(exec, ExecState::stringConstructorTable(exec), jsCast<StringConstructor*>(object), propertyName, descriptor);
}
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->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));
}
JSCell* JSC_HOST_CALL stringFromCharCode(ExecState* exec, int32_t arg)
{
return jsSingleCharacterString(exec, arg);
}
static EncodedJSValue JSC_HOST_CALL constructWithStringConstructor(ExecState* exec)
{
JSGlobalObject* globalObject = asInternalFunction(exec->callee())->globalObject();
if (!exec->argumentCount())
return JSValue::encode(StringObject::create(exec, globalObject->stringObjectStructure()));
return JSValue::encode(StringObject::create(exec, globalObject->stringObjectStructure(), exec->argument(0).toString(exec)));
}
ConstructType StringConstructor::getConstructData(JSCell*, ConstructData& constructData)
{
constructData.native.function = constructWithStringConstructor;
return ConstructTypeHost;
}
static EncodedJSValue JSC_HOST_CALL callStringConstructor(ExecState* exec)
{
if (!exec->argumentCount())
return JSValue::encode(jsEmptyString(exec));
return JSValue::encode(exec->argument(0).toString(exec));
}
CallType StringConstructor::getCallData(JSCell*, CallData& callData)
{
callData.native.function = callStringConstructor;
return CallTypeHost;
}
}