Function LongFilePath

BaseTools/Source/C/Common/CommonLib.c:594–735

CHAR8 mCommonLibFullPath[MAX_LONG_FILE_PATH];

CHAR8 *
LongFilePath (
 IN CHAR8 *FileName
 )
/*++

Routine Description:
  Convert FileName to the long file path, which can support larger than 260 length.

Arguments:
  FileName         - FileName.

Returns:
  LongFilePath      A pointer to the converted long file path.

--*/
{
#ifdef __GNUC__
  //
  // __GNUC__ may not be good way to differentiate unix and windows. Need more investigation here.
  // unix has no limitation on file path. Just return FileName.
  //
  return FileName;
#else
  CHAR8 *RootPath;
  CHAR8 *PathPointer;
  CHAR8 *NextPointer;

  PathPointer = (CHAR8 *) FileName;

  if (FileName != NULL) {
    //
    // Add the extension string first to support long file path.
    //
    mCommonLibFullPath[0] = 0;
    strcpy (mCommonLibFullPath, WINDOWS_EXTENSION_PATH);

    if (strlen (FileName) > 1 && FileName[0] == '\\' && FileName[1] == '\\') {
      //
      // network path like \\server\share to \\?\UNC\server\share
      //
      strcpy (mCommonLibFullPath, WINDOWS_UNC_EXTENSION_PATH);
      FileName ++;
    } else if (strlen (FileName) < 3 || FileName[1] != ':' || (FileName[2] != '\\' && FileName[2] != '/')) {
      //
      // Relative file path. Convert it to absolute path.
      //
      RootPath = getcwd (NULL, 0);
      if (RootPath != NULL) {
        if (strlen (mCommonLibFullPath) + strlen (RootPath) > MAX_LONG_FILE_PATH - 1) {
          Error (NULL, 0, 2000, "Invalid parameter", "RootPath is too long!");
          free (RootPath);
          return NULL;
        }
        strncat (mCommonLibFullPath, RootPath, MAX_LONG_FILE_PATH - strlen (mCommonLibFullPath) - 1);
        if (FileName[0] != '\\' && FileName[0] != '/') {
          if (strlen (mCommonLibFullPath) + 1 > MAX_LONG_FILE_PATH - 1) {
            Error (NULL, 0, 2000, "Invalid parameter", "RootPath is too long!");