Method Create

src/diskfile.cpp:111–175

Create new file on disk and make sure that there is enough space on disk for it.

// Create new file on disk and make sure that there is enough
// space on disk for it.
bool DiskFile::Create(std::string _filename, u64 _filesize)
{
  assert(hFile == INVALID_HANDLE_VALUE);

  filename = _filename;
  filesize = _filesize;

  if (!DiskFile::CreateParentDirectory(filename))
    return false;

  // Create the file
  std::wstring wfilename = utf8::Utf8ToWide(_filename);
  hFile = ::CreateFileW(wfilename.c_str(), GENERIC_READ | GENERIC_WRITE, 0, NULL, CREATE_NEW, 0, NULL);
  if (hFile == INVALID_HANDLE_VALUE)
  {
    DWORD error = ::GetLastError();

    #pragma omp critical
    *serr << "Could not create \"" << _filename << "\": " << ErrorMessage(error) << std::endl;

    return false;
  }

  if (filesize > 0)
  {
    // Seek to the end of the file
    LONG* ptrfilesize = (LONG*)&filesize;
    LONG lowoffset = ptrfilesize[0];
    LONG highoffset = ptrfilesize[1];

    if (INVALID_SET_FILE_POINTER == SetFilePointer(hFile, lowoffset, &highoffset, FILE_BEGIN))
    {
      DWORD error = ::GetLastError();

      #pragma omp critical
      *serr << "Could not set size of \"" << _filename << "\": " << ErrorMessage(error) << std::endl;

      ::CloseHandle(hFile);
      hFile = INVALID_HANDLE_VALUE;
      ::DeleteFileW(wfilename.c_str());

      return false;
    }

    // Set the end of the file
    if (!::SetEndOfFile(hFile))
    {
      DWORD error = ::GetLastError();

      #pragma omp critical
      *serr << "Could not set size of \"" << _filename << "\": " << ErrorMessage(error) << std::endl;

      ::CloseHandle(hFile);
      hFile = INVALID_HANDLE_VALUE;
      ::DeleteFileW(wfilename.c_str());

      return false;
    }