file.h

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/*
 *
 *    Copyright (c) 2014,2017-2018,2020,2022
 *      SMASH Team
 *
 *    GNU General Public License (GPLv3 or later)
 *
 */
 
#ifndef SRC_INCLUDE_SMASH_FILE_H_
#define SRC_INCLUDE_SMASH_FILE_H_
 
#include <cerrno>
#include <cstdio>
#include <cstring>
#include <filesystem>
#include <memory>
#include <stdexcept>
#include <string>
 
#include "forwarddeclarations.h"
 
namespace smash {
 
struct FileDeleter {
  constexpr FileDeleter() = default;
 
  void operator()(std::FILE* f) const {
    if (f == nullptr) {
      return;
    }
    if (0 != std::fclose(f)) {
      throw std::runtime_error(std::strerror(errno));
    }
  }
};
 
using FilePtr = std::unique_ptr<std::FILE, FileDeleter>;
 
class RenamingFilePtr {
 public:
  RenamingFilePtr(const std::filesystem::path& filename,
                  const std::string& mode);
  FILE* get();
  ~RenamingFilePtr();
 
 private:
  FILE* file_;
  std::filesystem::path filename_;
  std::filesystem::path filename_unfinished_;
  int uncaught_exceptions_{std::uncaught_exceptions()};
};
 
FilePtr fopen(const std::filesystem::path& filename, const std::string& mode);
 
}  // namespace smash
 
#endif  // SRC_INCLUDE_SMASH_FILE_H_