Function LoadModelNaive

lite/model_parser/model_parser.cc:646–698

////////////////////////////////////////////////////////////////////////// Old Method of loading and saving model, before V2.3.0 */ Warning: this is an old inference and will be abandened in release/v3.0.0 */ //////////////////////////////////////////////////////////////////////////

/* Warning: this is an old inference and will be abandened in release/v3.0.0 */
///////////////////////////////////////////////////////////////////////////////
void LoadModelNaive(const std::string &model_dir,
                    Scope *scope,
                    cpp::ProgramDesc *cpp_prog,
                    bool combined) {
  CHECK(cpp_prog);
  CHECK(scope);
  cpp_prog->ClearBlocks();

  LOG(WARNING)
      << "WARNING: MobileConfig::set_model_dir and "
         "MobileConfig::set_model_buffer are deprecated APIs "
         "and will be removed in latter release. \n"
         "    MobileConfig::set_model_from_file(const std::string& model_file)"
         " and MobileConfig::set_model_from_buffer(const std::string& "
         "model_buffer) are recommended.";
  // Load model
  const std::string prog_path = model_dir + "/__model__.nb";
  naive_buffer::BinaryTable table;
  table.LoadFromFile(prog_path);
  naive_buffer::proto::ProgramDesc nb_proto_prog(&table);
  nb_proto_prog.Load();
  naive_buffer::ProgramDesc nb_prog(&nb_proto_prog);

  // Transform to cpp::ProgramDesc
  TransformProgramDescAnyToCpp(nb_prog, cpp_prog);

  // Load Params
  // NOTE: Only main block be used now.
  if (combined) {
    const std::string combined_params_path = model_dir + "/param.nb";
    LoadCombinedParamsNaive(combined_params_path, 0, scope, *cpp_prog, false);
  } else {
    auto &prog = *cpp_prog;
    auto &main_block_desc = *prog.GetBlock<cpp::BlockDesc>(0);
    for (size_t i = 0; i < main_block_desc.VarsSize(); ++i) {
      auto &var = *main_block_desc.GetVar<cpp::VarDesc>(i);
      if (!IsParamVarDesc(var)) continue;

      std::string file_path = model_dir + "/" + var.Name() + ".nb";
      VLOG(4) << "reading weight " << var.Name();

      switch (var.GetType()) {
        case VarDescAPI::Type::LOD_TENSOR:
          LoadParamNaive(file_path, scope, var.Name());
          break;
        default:
          CHECK(false) << "unknown weight type";
      }
    }
  }

  VLOG(4) << "Load naive buffer model in '" << model_dir << "' successfully";
}

void LoadModelNaiveFromMemory(const std::string &model_buffer,
                              const std::string &param_buffer,