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#pragma once
#include <yql/essentials/minikql/defs.h>
#include <yql/essentials/minikql/mkql_node.h>
#include <yql/essentials/minikql/pack_num.h>
#include <yql/essentials/public/decimal/yql_decimal_serialize.h>
#include <yql/essentials/public/udf/udf_value.h>
#include <library/cpp/packedtypes/zigzag.h>
#include <contrib/ydb/library/actors/util/rope.h>
#include <util/generic/buffer.h>
#include <util/generic/strbuf.h>
namespace NKikimr {
namespace NMiniKQL {
namespace NDetails {
template<typename TBuf>
inline void PackUInt64(ui64 val, TBuf& buf) {
buf.Advance(MAX_PACKED64_SIZE);
char* dst = buf.Pos() - MAX_PACKED64_SIZE;
buf.EraseBack(MAX_PACKED64_SIZE - Pack64(val, dst));
}
template<typename TBuf>
inline void PackInt64(i64 val, TBuf& buf) {
PackUInt64(ZigZagEncode(val), buf);
}
template<typename TBuf>
inline void PackUInt32(ui32 val, TBuf& buf) {
buf.Advance(MAX_PACKED32_SIZE);
char* dst = buf.Pos() - MAX_PACKED32_SIZE;
buf.EraseBack(MAX_PACKED32_SIZE - Pack32(val, dst));
}
template<typename TBuf>
inline void PackInt32(i32 val, TBuf& buf) {
PackUInt32(ZigZagEncode(val), buf);
}
template<typename TBuf>
inline void PackUInt16(ui16 val, TBuf& buf) {
buf.Advance(MAX_PACKED32_SIZE);
char* dst = buf.Pos() - MAX_PACKED32_SIZE;
buf.EraseBack(MAX_PACKED32_SIZE - Pack32(val, dst));
}
template<typename TBuf>
inline void PackInt16(i16 val, TBuf& buf) {
PackUInt16(ZigZagEncode(val), buf);
}
template <typename T, typename TBuf>
void PutRawData(T val, TBuf& buf) {
buf.Advance(sizeof(T));
std::memcpy(buf.Pos() - sizeof(T), &val, sizeof(T));
}
constexpr size_t MAX_PACKED_DECIMAL_SIZE = sizeof(NYql::NDecimal::TInt128);
template<typename TBuf>
void PackDecimal(NYql::NDecimal::TInt128 val, TBuf& buf) {
buf.Advance(MAX_PACKED_DECIMAL_SIZE);
char* dst = buf.Pos() - MAX_PACKED_DECIMAL_SIZE;
buf.EraseBack(MAX_PACKED_DECIMAL_SIZE - NYql::NDecimal::Serialize(val, dst));
}
class TChunkedInputBuffer : private TNonCopyable {
public:
explicit TChunkedInputBuffer(TRope&& rope)
: Rope_(std::move(rope))
{
Next();
}
explicit TChunkedInputBuffer(TStringBuf input)
: Rope_(TRope{})
, Data_(input.data())
, Len_(input.size())
{
}
inline const char* data() const {
return Data_;
}
inline size_t length() const {
return Len_;
}
inline size_t size() const {
return Len_;
}
inline void Skip(size_t size) {
Y_DEBUG_ABORT_UNLESS(size <= Len_);
Data_ += size;
Len_ -= size;
}
bool IsEmpty() {
if (size()) {
return false;
}
Next();
return size() == 0;
}
inline void CopyTo(char* dst, size_t toCopy) {
if (Y_LIKELY(toCopy <= size())) {
std::memcpy(dst, data(), toCopy);
Skip(toCopy);
} else {
CopyToChunked(dst, toCopy);
}
}
inline TRope ReleaseRope() {
Y_DEBUG_ABORT_UNLESS(OriginalLen_ >= Len_);
Rope_.EraseFront(OriginalLen_ - Len_);
TRope result = std::move(Rope_);
Data_ = nullptr;
Len_ = OriginalLen_ = 0;
Rope_.clear();
return result;
}
void Next() {
Y_DEBUG_ABORT_UNLESS(Len_ == 0);
Rope_.EraseFront(OriginalLen_);
if (!Rope_.IsEmpty()) {
Len_ = OriginalLen_ = Rope_.begin().ContiguousSize();
Data_ = Rope_.begin().ContiguousData();
Y_DEBUG_ABORT_UNLESS(Len_ > 0);
} else {
Len_ = OriginalLen_ = 0;
Data_ = nullptr;
}
}
private:
void CopyToChunked(char* dst, size_t toCopy) {
while (toCopy) {
size_t chunkSize = std::min(size(), toCopy);
std::memcpy(dst, data(), chunkSize);
Skip(chunkSize);
dst += chunkSize;
toCopy -= chunkSize;
if (toCopy) {
Next();
MKQL_ENSURE(size(), "Unexpected end of buffer");
}
}
}
TRope Rope_;
const char* Data_ = nullptr;
size_t Len_ = 0;
size_t OriginalLen_ = 0;
};
template <typename T>
T GetRawData(TChunkedInputBuffer& buf) {
T val;
buf.CopyTo(reinterpret_cast<char*>(&val), sizeof(val));
return val;
}
template<typename T>
T UnpackInteger(TChunkedInputBuffer& buf) {
T res;
size_t read;
if constexpr (std::is_same_v<T, NYql::NDecimal::TInt128>) {
std::tie(res, read) = NYql::NDecimal::Deserialize(buf.data(), buf.size());
Y_DEBUG_ABORT_UNLESS((read != 0) xor (NYql::NDecimal::IsError(res)));
} else if constexpr (std::is_same_v<T, ui64>) {
read = Unpack64(buf.data(), buf.size(), res);
} else {
static_assert(std::is_same_v<T, ui32>, "Only ui32/ui64/TInt128 are supported");
read = Unpack32(buf.data(), buf.size(), res);
}
if (Y_LIKELY(read > 0)) {
buf.Skip(read);
return res;
}
static_assert(MAX_PACKED_DECIMAL_SIZE > MAX_PACKED64_SIZE);
char tmpBuf[MAX_PACKED_DECIMAL_SIZE];
Y_DEBUG_ABORT_UNLESS(buf.size() < MAX_PACKED_DECIMAL_SIZE);
std::memcpy(tmpBuf, buf.data(), buf.size());
size_t pos = buf.size();
buf.Skip(buf.size());
for (;;) {
if (buf.size() == 0) {
buf.Next();
MKQL_ENSURE(buf.size() > 0, (std::is_same_v<T, NYql::NDecimal::TInt128> ? "Bad decimal packed data" : "Bad uint packed data"));
}
Y_DEBUG_ABORT_UNLESS(pos < MAX_PACKED_DECIMAL_SIZE);
tmpBuf[pos++] = *buf.data();
buf.Skip(1);
if constexpr (std::is_same_v<T, NYql::NDecimal::TInt128>) {
std::tie(res, read) = NYql::NDecimal::Deserialize(tmpBuf, pos);
Y_DEBUG_ABORT_UNLESS((read != 0) xor (NYql::NDecimal::IsError(res)));
} else if constexpr (std::is_same_v<T, ui64>) {
read = Unpack64(tmpBuf, pos, res);
} else {
read = Unpack32(tmpBuf, pos, res);
}
if (read) {
break;
}
}
return res;
}
inline NYql::NDecimal::TInt128 UnpackDecimal(TChunkedInputBuffer& buf) {
return UnpackInteger<NYql::NDecimal::TInt128>(buf);
}
inline ui64 UnpackUInt64(TChunkedInputBuffer& buf) {
return UnpackInteger<ui64>(buf);
}
inline i64 UnpackInt64(TChunkedInputBuffer& buf) {
return ZigZagDecode(UnpackUInt64(buf));
}
inline ui32 UnpackUInt32(TChunkedInputBuffer& buf) {
return UnpackInteger<ui32>(buf);
}
inline i32 UnpackInt32(TChunkedInputBuffer& buf) {
return ZigZagDecode(UnpackUInt32(buf));
}
inline ui16 UnpackUInt16(TChunkedInputBuffer& buf) {
ui32 res = UnpackUInt32(buf);
MKQL_ENSURE(res <= Max<ui16>(), "Corrupted data");
return res;
}
inline i16 UnpackInt16(TChunkedInputBuffer& buf) {
return ZigZagDecode(UnpackUInt16(buf));
}
} // NDetails
}
}
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