Function CreateTempFileNearUtf8

src/tools/PlatformIO.cpp:78–134

}

FILE* CreateTempFileNearUtf8(const std::string& targetFileName,
                             std::string* fileName) {
#ifdef _WIN32
  if (fileName == nullptr) {
    return nullptr;
  }

  const std::wstring target = internal::WideFromUtf8(targetFileName);
  const std::wstring parent = ParentDirectory(target);
  const DWORD processId = GetCurrentProcessId();
  const ULONGLONG tick = GetTickCount64();

  for (int i = 0; i < 100; i++) {
    const std::wstring tempFileName =
        parent + L".opencc-" + std::to_wstring(processId) + L"-" +
        std::to_wstring(tick) + L"-" + std::to_wstring(i) + L".tmp";
    const int fd = _wopen(tempFileName.c_str(),
                          _O_CREAT | _O_EXCL | _O_BINARY | _O_WRONLY,
                          _S_IREAD | _S_IWRITE);
    if (fd == -1) {
      continue;
    }
    FILE* file = _wfdopen(fd, L"wb");
    if (file == nullptr) {
      _close(fd);
      DeleteFileW(tempFileName.c_str());
      return nullptr;
    }
    *fileName = internal::Utf8FromWide(tempFileName);
    return file;
  }
  return nullptr;
#else
  if (fileName == nullptr) {
    return nullptr;
  }

  std::string tempFileName = ParentDirectory(targetFileName);
  tempFileName += "/";
  tempFileName += "openccXXXXXX";

  std::vector<char> pathBuffer(tempFileName.begin(), tempFileName.end());
  pathBuffer.push_back('\0');
  const int fd = mkstemp(pathBuffer.data());
  if (fd == -1) {
    return nullptr;
  }
  FILE* file = fdopen(fd, "wb");
  if (file == nullptr) {
    close(fd);
    std::remove(pathBuffer.data());
    return nullptr;
  }
  *fileName = pathBuffer.data();
  return file;
#endif
}