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implement Object.getOwnPropertyDescriptor

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implement Array.prototype.reduce

Signed-off-by: seonghyun kim <sh8281.kim@samsung.com>
This commit is contained in:
seonghyun kim 2016-12-22 15:41:39 +09:00
commit 78eea30c84
5 changed files with 117 additions and 1 deletions
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51
src/runtime/GlobalObjectBuiltinArray.cpp
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@ -363,6 +363,55 @@ static Value builtinArrayEvery(ExecutionState& state, Value thisValue, size_t ar
return Value(true);
}
static Value builtinArrayReduce(ExecutionState& state, Value thisValue, size_t argc, Value* argv, bool isNewExpression)
{
// Let O be the result of calling ToObject passing the this value as the argument.
RESOLVE_THIS_BINDING_TO_OBJECT(O, Array, reduce);
uint32_t len = O->length(state); // 2-3
Value callbackfn = argv[0];
Value initialValue = Value(Value::EmptyValue);
if (argc > 1) {
initialValue = argv[1];
}
if (!callbackfn.isFunction()) // 4
ErrorObject::throwBuiltinError(state, ErrorObject::TypeError, state.context()->staticStrings().Array.string(), true, state.context()->staticStrings().reduce.string(), errorMessage_GlobalObject_CallbackNotCallable);
if (len == 0 && (initialValue.isUndefined() || initialValue.isEmpty())) // 5
ErrorObject::throwBuiltinError(state, ErrorObject::TypeError, state.context()->staticStrings().Array.string(), true, state.context()->staticStrings().reduce.string(), errorMessage_GlobalObject_ReduceError);
size_t k = 0; // 6
Value accumulator;
if (!initialValue.isEmpty()) { // 7
accumulator = initialValue;
} else { // 8
bool kPresent = false; // 8.a
while (kPresent == false && k < len) { // 8.b
Value Pk = Value(k); // 8.b.i
kPresent = O->hasProperty(state, ObjectPropertyName(state, Pk)); // 8.b.ii
if (kPresent)
accumulator = O->get(state, ObjectPropertyName(state, Pk)).value(state, O); // 8.b.iii.1
k++; // 8.b.iv
}
if (kPresent == false)
ErrorObject::throwBuiltinError(state, ErrorObject::TypeError, state.context()->staticStrings().Array.string(), true, state.context()->staticStrings().reduce.string(), errorMessage_GlobalObject_ReduceError);
}
while (k < len) { // 9
Value Pk = Value(k); // 9.a
bool kPresent = O->hasProperty(state, ObjectPropertyName(state, Pk)); // 9.b
if (kPresent) { // 9.c
Value kValue = O->get(state, ObjectPropertyName(state, Pk)).value(state, O); // 9.c.i
const int fnargc = 4;
Value fnargs[] = { accumulator, kValue, Value(k), O };
accumulator = FunctionObject::call(callbackfn, state, Value(), fnargc, fnargs);
k++;
} else {
k = Object::nextIndexForward(state, O, k, len, false);
}
}
return accumulator;
}
void GlobalObject::installArray(ExecutionState& state)
{
m_array = new FunctionObject(state, NativeFunctionInfo(state.context()->staticStrings().Array, builtinArrayConstructor, 1, [](ExecutionState& state, size_t argc, Value* argv) -> Object* {
@ -389,6 +438,8 @@ void GlobalObject::installArray(ExecutionState& state)
ObjectPropertyDescriptor(new FunctionObject(state, NativeFunctionInfo(state.context()->staticStrings().slice, builtinArraySlice, 2, nullptr, NativeFunctionInfo::Strict)), (ObjectPropertyDescriptor::PresentAttribute)(ObjectPropertyDescriptor::WritablePresent | ObjectPropertyDescriptor::ConfigurablePresent)));
m_arrayPrototype->defineOwnPropertyThrowsException(state, ObjectPropertyName(state.context()->staticStrings().every),
ObjectPropertyDescriptor(new FunctionObject(state, NativeFunctionInfo(state.context()->staticStrings().every, builtinArrayEvery, 1, nullptr, NativeFunctionInfo::Strict)), (ObjectPropertyDescriptor::PresentAttribute)(ObjectPropertyDescriptor::WritablePresent | ObjectPropertyDescriptor::ConfigurablePresent)));
m_arrayPrototype->defineOwnPropertyThrowsException(state, ObjectPropertyName(state.context()->staticStrings().reduce),
ObjectPropertyDescriptor(new FunctionObject(state, NativeFunctionInfo(state.context()->staticStrings().reduce, builtinArrayReduce, 1, nullptr, NativeFunctionInfo::Strict)), (ObjectPropertyDescriptor::PresentAttribute)(ObjectPropertyDescriptor::WritablePresent | ObjectPropertyDescriptor::ConfigurablePresent)));
m_arrayPrototype->defineOwnPropertyThrowsException(state, ObjectPropertyName(state.context()->staticStrings().toString),
ObjectPropertyDescriptor(new FunctionObject(state, NativeFunctionInfo(state.context()->staticStrings().toString, builtinArrayToString, 0, nullptr, NativeFunctionInfo::Strict)), (ObjectPropertyDescriptor::PresentAttribute)(ObjectPropertyDescriptor::WritablePresent | ObjectPropertyDescriptor::ConfigurablePresent)));