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#include "create_proto.h"
#include <library/cpp/xdelta3/state/data_ptr.h>
#include <library/cpp/xdelta3/state/hash.h>
#include <library/cpp/xdelta3/xdelta_codec/codec.h>
namespace NXdeltaAggregateColumn {
bool EncodeHeaderTo(const TStateHeader& header, ui8* data, size_t size, size_t& resultSize);
}
namespace {
using namespace NXdeltaAggregateColumn;
template<typename TResult>
TResult EncodeProto(const TStateHeader& header, const ui8* data, size_t size)
{
using namespace NProtoBuf::io;
TResult result;
ui8 totalHeaderSize = SizeOfHeader(header);
ui8* ptr = nullptr;
if constexpr (std::is_same_v<TResult, TString>) {
result.ReserveAndResize(totalHeaderSize + size);
ptr = reinterpret_cast<ui8*>(&result[0]);
} else {
result.Resize(totalHeaderSize + size);
ptr = reinterpret_cast<ui8*>(result.Data());
}
size_t resultSize = 0;
if (EncodeHeaderTo(header, ptr, result.Size(), resultSize)) {
if (data && size) {
memcpy(ptr + totalHeaderSize, data, size);
}
return result;
}
return {};
}
template<typename TResult>
TResult EncodeErrorProto(TStateHeader::EErrorCode error, const TChangeHeader& changeHeader = {})
{
TStateHeader header;
header.set_error_code(error);
if (changeHeader) {
changeHeader(header);
}
return EncodeProto<TResult>(header, nullptr, 0);
}
template<typename TResult>
TResult EncodeBaseProto(const ui8* base, size_t baseSize, const TChangeHeader& changeHeader = {})
{
TStateHeader header;
header.set_type(TStateHeader::BASE);
header.set_data_size(baseSize);
if (changeHeader) {
changeHeader(header);
}
return EncodeProto<TResult>(header, base, baseSize);
}
template<typename TResult>
TResult EncodePatchProto(const ui8* base, size_t baseSize, const ui8* state, size_t stateSize, const ui8* patch, size_t patchSize, const TChangeHeader& changeHeader = {})
{
TStateHeader header;
header.set_type(TStateHeader::PATCH);
header.set_data_size(patchSize);
header.set_state_hash(CalcHash(state, stateSize));
header.set_state_size(stateSize);
header.set_base_hash(CalcHash(base, baseSize));
if (changeHeader) {
changeHeader(header);
}
return EncodeProto<TResult>(header, patch, patchSize);
}
template<typename TResult>
TResult EncodePatchProto(const ui8* base, size_t baseSize, const ui8* state, size_t stateSize, const TChangeHeader& changeHeader = {})
{
size_t patchSize = 0;
auto patch = TDataPtr(ComputePatch(nullptr, base, baseSize, state, stateSize, &patchSize));
return EncodePatchProto<TResult>(base, baseSize, state, stateSize, patch.get(), patchSize, changeHeader);
}
}
namespace NXdeltaAggregateColumn {
TBuffer EncodeErrorProtoAsBuffer(TStateHeader::EErrorCode error, const TChangeHeader& changeHeader) {
return EncodeErrorProto<TBuffer>(error, changeHeader);
}
TBuffer EncodeBaseProtoAsBuffer(const ui8* base, size_t baseSize, const TChangeHeader& changeHeader) {
return EncodeBaseProto<TBuffer>(base, baseSize, changeHeader);
}
TBuffer EncodePatchProtoAsBuffer(const ui8* base, size_t baseSize, const ui8* state, size_t stateSize, const TChangeHeader& changeHeader) {
return EncodePatchProto<TBuffer>(base, baseSize, state, stateSize, changeHeader);
}
TBuffer EncodePatchProtoAsBuffer(const ui8* base, size_t baseSize, const ui8* state, size_t stateSize, const ui8* patch, size_t patchSize, const TChangeHeader& changeHeader) {
return EncodePatchProto<TBuffer>(base, baseSize, state, stateSize, patch, patchSize, changeHeader);
}
TBuffer EncodeProtoAsBuffer(const TStateHeader& header, const ui8* data, size_t size) {
return EncodeProto<TBuffer>(header, data, size);
}
TString EncodeErrorProtoAsString(TStateHeader::EErrorCode error, const TChangeHeader& changeHeader) {
return EncodeErrorProto<TString>(error, changeHeader);
}
TString EncodeBaseProtoAsString(const ui8* base, size_t baseSize, const TChangeHeader& changeHeader) {
return EncodeBaseProto<TString>(base, baseSize, changeHeader);
}
TString EncodePatchProtoAsString(const ui8* base, size_t baseSize, const ui8* state, size_t stateSize, const TChangeHeader& changeHeader) {
return EncodePatchProto<TString>(base, baseSize, state, stateSize, changeHeader);
}
TString EncodePatchProtoAsString(const ui8* base, size_t baseSize, const ui8* state, size_t stateSize, const ui8* patch, size_t patchSize, const TChangeHeader& changeHeader) {
return EncodePatchProto<TString>(base, baseSize, state, stateSize, patch, patchSize, changeHeader);
}
TString EncodeProtoAsString(const TStateHeader& header, const ui8* data, size_t size) {
return EncodeProto<TString>(header, data, size);
}
}
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