Program Listing for File io.h

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

#ifndef TVM_SUPPORT_IO_H_
#define TVM_SUPPORT_IO_H_

#include <cstddef>
#include <cstdint>

namespace tvm {
namespace support {

template <typename T, typename = void>
struct Serializer {
  static constexpr bool enabled = false;
};

class Stream {
 public:
  virtual size_t Read(void* ptr, size_t size) = 0;

  virtual size_t Write(const void* ptr, size_t size) = 0;

  virtual ~Stream() = default;

  template <typename T>
  void Write(const T& data) {
    static_assert(Serializer<T>::enabled, "No Serializer<T> specialization for this type");
    Serializer<T>::Write(this, data);
  }

  template <typename T>
  bool Read(T* out_data) {
    static_assert(Serializer<T>::enabled, "No Serializer<T> specialization for this type");
    return Serializer<T>::Read(this, out_data);
  }

  template <typename T>
  void WriteArray(const T* data, size_t num_elems) {
    for (size_t i = 0; i < num_elems; ++i) Write<T>(data[i]);
  }

  template <typename T>
  bool ReadArray(T* data, size_t num_elems) {
    for (size_t i = 0; i < num_elems; ++i) {
      if (!Read<T>(data + i)) return false;
    }
    return true;
  }
};

}  // namespace support
}  // namespace tvm

#endif  // TVM_SUPPORT_IO_H_