StringConstructor.cpp [plain text]
#include "config.h"
#include "StringConstructor.h"
#include "JSFunction.h"
#include "JSGlobalObject.h"
#include "PrototypeFunction.h"
#include "StringPrototype.h"
namespace JSC {
static NEVER_INLINE JSValue stringFromCharCodeSlowCase(ExecState* exec, const ArgList& args)
{
unsigned length = args.size();
UChar* buf;
PassRefPtr<UStringImpl> impl = UStringImpl::createUninitialized(length, buf);
for (unsigned i = 0; i < length; ++i)
buf[i] = static_cast<UChar>(args.at(i).toUInt32(exec));
return jsString(exec, impl);
}
static JSValue JSC_HOST_CALL stringFromCharCode(ExecState* exec, JSObject*, JSValue, const ArgList& args)
{
if (LIKELY(args.size() == 1))
return jsSingleCharacterString(exec, args.at(0).toUInt32(exec));
return stringFromCharCodeSlowCase(exec, args);
}
ASSERT_CLASS_FITS_IN_CELL(StringConstructor);
StringConstructor::StringConstructor(ExecState* exec, NonNullPassRefPtr<Structure> structure, Structure* prototypeFunctionStructure, StringPrototype* stringPrototype)
: InternalFunction(&exec->globalData(), structure, Identifier(exec, stringPrototype->classInfo()->className))
{
putDirectWithoutTransition(exec->propertyNames().prototype, stringPrototype, ReadOnly | DontEnum | DontDelete);
putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, prototypeFunctionStructure, 1, exec->propertyNames().fromCharCode, stringFromCharCode), DontEnum);
putDirectWithoutTransition(exec->propertyNames().length, jsNumber(exec, 1), ReadOnly | DontEnum | DontDelete);
}
static JSObject* constructWithStringConstructor(ExecState* exec, JSObject*, const ArgList& args)
{
if (args.isEmpty())
return new (exec) StringObject(exec, exec->lexicalGlobalObject()->stringObjectStructure());
return new (exec) StringObject(exec, exec->lexicalGlobalObject()->stringObjectStructure(), args.at(0).toString(exec));
}
ConstructType StringConstructor::getConstructData(ConstructData& constructData)
{
constructData.native.function = constructWithStringConstructor;
return ConstructTypeHost;
}
static JSValue JSC_HOST_CALL callStringConstructor(ExecState* exec, JSObject*, JSValue, const ArgList& args)
{
if (args.isEmpty())
return jsEmptyString(exec);
return jsString(exec, args.at(0).toString(exec));
}
CallType StringConstructor::getCallData(CallData& callData)
{
callData.native.function = callStringConstructor;
return CallTypeHost;
}
}