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#include "entitybuffer.h"
#include "entity_generated.h"
#include "metadata_generated.h"
#include <QDebug>
using namespace Akonadi2;
EntityBuffer::EntityBuffer(const void *dataValue, int dataSize)
: mEntity(nullptr)
{
flatbuffers::Verifier verifyer(reinterpret_cast<const uint8_t *>(dataValue), dataSize);
// Q_ASSERT(Akonadi2::VerifyEntity(verifyer));
if (!Akonadi2::VerifyEntityBuffer(verifyer)) {
qWarning() << "invalid buffer";
} else {
mEntity = Akonadi2::GetEntity(dataValue);
}
}
bool EntityBuffer::isValid() const
{
return mEntity;
}
const Akonadi2::Entity &EntityBuffer::entity()
{
return *mEntity;
}
const uint8_t* EntityBuffer::resourceBuffer()
{
if (!mEntity) {
qDebug() << "no buffer";
return nullptr;
}
return mEntity->resource()->Data();
}
const uint8_t* EntityBuffer::metadataBuffer()
{
if (!mEntity) {
return nullptr;
}
return mEntity->metadata()->Data();
}
const uint8_t* EntityBuffer::localBuffer()
{
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)
{
Akonadi2::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 = Akonadi2::CreateEntity(fbb, metadata, resource, local);
Akonadi2::FinishEntityBuffer(fbb, entity);
}
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