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#include "mkql_custom_list.h"
namespace NKikimr {
namespace NMiniKQL {
TForwardListValue::TForwardListValue(TMemoryUsageInfo* memInfo, NUdf::TUnboxedValue&& stream)
: TCustomListValue(memInfo)
, Stream(std::move(stream))
{
MKQL_ENSURE(Stream, "Empty stream.");
}
TForwardListValue::TIterator::TIterator(TMemoryUsageInfo* memInfo, NUdf::TUnboxedValue&& stream)
: TComputationValue(memInfo), Stream(std::move(stream))
{}
bool TForwardListValue::TIterator::Next(NUdf::TUnboxedValue& value) {
const auto status = Stream.Fetch(value);
MKQL_ENSURE(status != NUdf::EFetchStatus::Yield, "Unexpected stream status.");
return status == NUdf::EFetchStatus::Ok;
}
NUdf::TUnboxedValue TForwardListValue::GetListIterator() const {
MKQL_ENSURE(Stream, "Second pass for ForwardList");
return NUdf::TUnboxedValuePod(new TIterator(GetMemInfo(), std::move(Stream)));
}
TExtendListValue::TExtendListValue(TMemoryUsageInfo* memInfo, TUnboxedValueVector&& lists)
: TCustomListValue(memInfo)
, Lists(std::move(lists))
{
MKQL_MEM_TAKE(memInfo, Lists.data(), Lists.capacity() * sizeof(NUdf::TUnboxedValue));
Y_ASSERT(!Lists.empty());
}
TExtendListValue::TIterator::TIterator(TMemoryUsageInfo* memInfo, TUnboxedValueVector&& iters)
: TComputationValue(memInfo)
, Iters(std::move(iters))
, Index(0)
{
MKQL_MEM_TAKE(memInfo, Iters.data(), Iters.capacity() * sizeof(NUdf::TUnboxedValue));
}
TExtendListValue::TIterator::~TIterator()
{
MKQL_MEM_RETURN(GetMemInfo(), Iters.data(), Iters.capacity() * sizeof(NUdf::TUnboxedValue));
}
bool TExtendListValue::TIterator::Next(NUdf::TUnboxedValue& value) {
for (; Index < Iters.size(); ++Index) {
if (Iters[Index].Next(value)) {
return true;
}
}
return false;
}
bool TExtendListValue::TIterator::Skip() {
for (; Index < Iters.size(); ++Index) {
if (Iters[Index].Skip()) {
return true;
}
}
return false;
}
NUdf::TUnboxedValue TExtendListValue::GetListIterator() const {
TUnboxedValueVector iters;
iters.reserve(Lists.size());
for (const auto& list : Lists) {
iters.emplace_back(list.GetListIterator());
}
return NUdf::TUnboxedValuePod(new TIterator(GetMemInfo(), std::move(iters)));
}
TExtendListValue::~TExtendListValue() {
MKQL_MEM_RETURN(GetMemInfo(), Lists.data(), Lists.capacity() * sizeof(NUdf::TUnboxedValue));
}
ui64 TExtendListValue::GetListLength() const {
if (!Length) {
ui64 length = 0ULL;
for (const auto& list : Lists) {
ui64 partialLength = list.GetListLength();
length += partialLength;
}
Length = length;
}
return *Length;
}
bool TExtendListValue::HasListItems() const {
if (!HasItems) {
for (const auto& list : Lists) {
if (list.HasListItems()) {
HasItems = true;
break;
}
}
if (!HasItems) {
HasItems = false;
}
}
return *HasItems;
}
TExtendStreamValue::TExtendStreamValue(TMemoryUsageInfo* memInfo, TUnboxedValueVector&& lists)
: TBase(memInfo)
, Lists(std::move(lists))
{
MKQL_MEM_TAKE(memInfo, Lists.data(), Lists.capacity() * sizeof(NUdf::TUnboxedValue));
Y_ASSERT(!Lists.empty());
}
TExtendStreamValue::~TExtendStreamValue() {
MKQL_MEM_RETURN(GetMemInfo(), Lists.data(), Lists.capacity() * sizeof(NUdf::TUnboxedValue));
}
NUdf::EFetchStatus TExtendStreamValue::Fetch(NUdf::TUnboxedValue& value) {
for (; Index < Lists.size(); ++Index) {
const auto status = Lists[Index].Fetch(value);
if (status != NUdf::EFetchStatus::Finish) {
return status;
}
}
return NUdf::EFetchStatus::Finish;
}
}
}
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