undo_data.h

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#pragma once
 
// standard library headers
#include <cstdint>
#include <optional>
#include <string>
#include <vector>
 
namespace nvprefs {
 
  class undo_data_t {
  public:
    struct data_t {
      struct opengl_swapchain_t {
        uint32_t our_value;
        std::optional<uint32_t> undo_value;
      };
 
      std::optional<opengl_swapchain_t> opengl_swapchain;
    };
 
    void
    set_opengl_swapchain(uint32_t our_value, std::optional<uint32_t> undo_value);
 
    std::optional<data_t::opengl_swapchain_t>
    get_opengl_swapchain() const;
 
    std::string
    write() const;
 
    void
    read(const std::vector<char> &buffer);
 
    void
    merge(const undo_data_t &newer_data);
 
  private:
    data_t data;
  };
 
}  // namespace nvprefs