Method Load

catboost/libs/model/model.cpp:1179–1228

}

void TFullModel::Load(IInputStream* s) {
    ReferenceMainFactoryRegistrators();
    using namespace flatbuffers;
    using namespace NCatBoostFbs;
    ui32 fileDescriptor;
    ::Load(s, fileDescriptor);
    CB_ENSURE(fileDescriptor == GetModelFormatDescriptor(), "Incorrect model file descriptor");
    auto coreSize = ::LoadSize(s);
    TArrayHolder<ui8> arrayHolder(new ui8[coreSize]);
    s->LoadOrFail(arrayHolder.Get(), coreSize);

    {
        flatbuffers::Verifier verifier(arrayHolder.Get(), coreSize, 64 /* max depth */, 256000000 /* max tables */);
        CB_ENSURE(VerifyTModelCoreBuffer(verifier), "Flatbuffers model verification failed");
    }
    auto fbModelCore = GetTModelCore(arrayHolder.Get());
    DefaultFullModelInit(fbModelCore);

    if (fbModelCore->ModelTrees()) {
        ModelTrees.GetMutable()->FBDeserializeOwning(fbModelCore->ModelTrees());
    }

    TVector<TString> modelParts;
    if (fbModelCore->ModelPartIds()) {
        for (auto part : *fbModelCore->ModelPartIds()) {
            modelParts.emplace_back(part->str());
        }
    }
    if (!modelParts.empty()) {
        for (const auto& modelPartId : modelParts) {
            if (modelPartId == TStaticCtrProvider::ModelPartId()) {
                CtrProvider = new TStaticCtrProvider;
                CtrProvider->Load(s);
            } else if (modelPartId == NCB::TTextProcessingCollection::GetStringIdentifier()) {
                TextProcessingCollection = new NCB::TTextProcessingCollection();
                TextProcessingCollection->Load(s);
            } else if (modelPartId == NCB::TEmbeddingProcessingCollection::GetStringIdentifier()) {
                EmbeddingProcessingCollection = new NCB::TEmbeddingProcessingCollection();
                EmbeddingProcessingCollection->Load(s);
            } else {
                CB_ENSURE(
                    false,
                    "Got unknown partId = " << modelPartId << " via deserialization. "
                        << "Only static ctr, text or embedding processing collection model parts are supported"
                );
            }
        }
    }
    UpdateDynamicData();
}

void TFullModel::InitNonOwning(const void* binaryBuffer, size_t binarySize) {
    using namespace flatbuffers;