File indexing completed on 2024-05-12 05:25:58

 #include "entitybuffer.h"
 
 #include "entity_generated.h"
 #include "metadata_generated.h"
 #include <QDebug>
 
 using namespace Sink;
 
 EntityBuffer::EntityBuffer(const void *dataValue, int dataSize) : mEntity(nullptr)
 {
     flatbuffers::Verifier verifyer(reinterpret_cast<const uint8_t *>(dataValue), dataSize);
     // Q_ASSERT(Sink::VerifyEntity(verifyer));
     if (!Sink::VerifyEntityBuffer(verifyer)) {
         qWarning() << "invalid buffer";
     } else {
         mEntity = Sink::GetEntity(dataValue);
     }
 }
 
 EntityBuffer::EntityBuffer(const QByteArray &data) : EntityBuffer(data.constData(), data.size())
 {
 }
 
 bool EntityBuffer::isValid() const
 {
     return mEntity;
 }
 
 const Sink::Entity &EntityBuffer::entity() const
 {
     Q_ASSERT(mEntity);
     return *mEntity;
 }
 
 const uint8_t *EntityBuffer::resourceBuffer() const
 {
     if (!mEntity) {
         qDebug() << "no buffer";
         return nullptr;
     }
     return mEntity->resource()->Data();
 }
 
 const uint8_t *EntityBuffer::metadataBuffer() const
 {
     if (!mEntity) {
         return nullptr;
     }
     return mEntity->metadata()->Data();
 }
 
 const uint8_t *EntityBuffer::localBuffer() const
 {
     if (!mEntity) {
         return nullptr;
     }
     return mEntity->local()->Data();
 }
 
 void EntityBuffer::extractResourceBuffer(void *dataValue, int dataSize, const std::function<void(const uint8_t *, size_t size)> &handler)
 {
     Sink::EntityBuffer buffer(dataValue, dataSize);
     if (auto resourceData = buffer.entity().resource()) {
         handler(resourceData->Data(), resourceData->size());
     }
 }
 
 flatbuffers::Offset<flatbuffers::Vector<uint8_t>> EntityBuffer::appendAsVector(flatbuffers::FlatBufferBuilder &fbb, void const *data, size_t size)
 {
     // Since we do memcpy trickery, this will only work on little endian
     assert(FLATBUFFERS_LITTLEENDIAN);
     uint8_t *rawDataPtr = Q_NULLPTR;
     const auto pos = fbb.CreateUninitializedVector<uint8_t>(size, &rawDataPtr);
     std::memcpy((void *)rawDataPtr, data, size);
     return pos;
 }
 
 void EntityBuffer::assembleEntityBuffer(
     flatbuffers::FlatBufferBuilder &fbb, void const *metadataData, size_t metadataSize, void const *resourceData, size_t resourceSize, void const *localData, size_t localSize)
 {
     auto metadata = appendAsVector(fbb, metadataData, metadataSize);
     auto resource = appendAsVector(fbb, resourceData, resourceSize);
     auto local = appendAsVector(fbb, localData, localSize);
     auto entity = Sink::CreateEntity(fbb, metadata, resource, local);
     Sink::FinishEntityBuffer(fbb, entity);
 }
 
 Sink::Operation EntityBuffer::operation() const
 {
     const auto metadataBuffer = readBuffer<Sink::Metadata>(mEntity->metadata());
     return metadataBuffer ? metadataBuffer->operation() : Sink::Operation_Creation;
 }
 
 qint64 EntityBuffer::revision() const
 {
     const auto metadataBuffer = readBuffer<Sink::Metadata>(mEntity->metadata());
     return metadataBuffer ? metadataBuffer->revision() : -1;
 }