verified_flatbuffer.h

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/*
 * Copyright Paul Reimer, 2018
 *
 * This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 Unported License.
 * To view a copy of this license, visit
 * https://creativecommons.org/licenses/by-nc-sa/4.0/
 * or send a letter to
 * Creative Commons, 444 Castro Street, Suite 900, Mountain View, California, 94041, USA.
 */

#pragma once

#include <memory>

#include "flatbuffers/flatbuffers.h"

template <typename T>
class VerifiedFlatbuffer
{
  explicit VerifiedFlatbuffer(const flatbuffers::DetachedBuffer&& _buf)
  : buf(std::move(_buf))
  {
    auto buf_ref = flatbuffers::BufferRef<T>{buf.data(), buf.size()};
    verified = buf_ref.Verify();
  }

  ~VerifiedFlatbuffer() = default;

  const T* GetRoot() const
  {
    return flatbuffers::GetRoot<T>(verified? buf.data() : nullptr);
  }

  bool verified = false;
  const flatbuffers::DetachedBuffer buf;
};