text: /*
   * Copyright (c) 2019, NVIDIA CORPORATION. All rights reserved.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  #pragma once
  
  #include <cstring>
  #include <vector>
  #include <cassert>
  #include <type_traits>
  
  #include <iostream>
  using std::cout;
  using std::cerr;
  using std::endl;
  
  template<typename T>
  inline void serialize_value(void** buffer, T const& value);
  
  template<typename T>
  inline void deserialize_value(void const** buffer, size_t* buffer_size, T* value);
  
  namespace {
  
  template<typename T, class Enable=void>
  struct Serializer {};
  
  template<typename T>
  struct Serializer<T, typename std::enable_if<
                         std::is_arithmetic<T>::value ||
                         std::is_enum<T>::value ||
                         std::is_pod<T>::value>::type> {
    static size_t serialized_size(T const& value) {
      return sizeof(T);
    }
    static void serialize(void** buffer, T const& value) {
      ::memcpy(*buffer, &value, sizeof(T));
      reinterpret_cast<char*&>(*buffer) += sizeof(T);
    }
    static void deserialize(void const** buffer, size_t* buffer_size, T* value) {
      assert(*buffer_size >= sizeof(T));
      ::memcpy(value, *buffer, sizeof(T));
      reinterpret_cast<char const*&>(*buffer) += sizeof(T);
      *buffer_size -= sizeof(T);
    }
  };
  
  template<>
  struct Serializer<const char*> {
    static size_t serialized_size(const char* value) {
      return strlen(value) + 1;
    }
    static void serialize(void** buffer, const char* value) {
      ::strcpy(static_cast<char*>(*buffer), value);
      reinterpret_cast<char*&>(*buffer) += strlen(value) + 1;
    }
    static void deserialize(void const** buffer, size_t* buffer_size, const char** value) {
      *value = static_cast<char const*>(*buffer);
      size_t data_size = strnlen(*value, *buffer_size) + 1;
      assert(*buffer_size >= data_size);
      reinterpret_cast<char const*&>(*buffer) += data_size;
      *buffer_size -= data_size;
    }
  };
  
  template<typename T>
  struct Serializer<std::vector<T>, typename std::enable_if<
                                      std::is_arithmetic<T>::value ||
                                      std::is_enum<T>::value ||
                                      std::is_pod<T>::value>::type> {
    static size_t serialized_size(std::vector<T> const& value) {
      return sizeof(value.size()) + value.size() * sizeof(T);
    }
    static void serialize(void** buffer, std::vector<T> const& value) {
      serialize_value(buffer, value.size());
      size_t nbyte = value.size() * sizeof(T);
      ::memcpy(*buffer, value.data(), nbyte);
      reinterpret_cast<char*&>(*buffer) += nbyte;
    }
    static void deserialize(void const** buffer, size_t* buffer_size, std::vector<T>* value) {
      size_t size;
      deserialize_value(buffer, buffer_size, &size);
      value->resize(size);
      size_t nbyte = value->size() * sizeof(T);
      assert(*buffer_size >= nbyte);
      ::memcpy(value->data(), *buffer, nbyte);
      reinterpret_cast<char const*&>(*buffer) += nbyte;
      *buffer_size -= nbyte;
    }
  };
  
  } // namespace
  
  template<typename T>
  inline size_t serialized_size(T const& value) {
    return Serializer<T>::serialized_size(value);
  }
  
  template<typename T>
  inline void serialize_value(void** buffer, T const& value) {
    return Serializer<T>::serialize(buffer, value);
  }
  
  template<typename T>
  inline void deserialize_value(void const** buffer, size_t* buffer_size, T* value) {
    return Serializer<T>::deserialize(buffer, buffer_size, value);
  }