Function FileCreate

Libraries/unrar/filcreat.cpp:6–54

If NewFile==NULL, we delete created file after user confirmation. It is useful we we need to overwrite an existing folder or file, but need user confirmation for that.

// It is useful we we need to overwrite an existing folder or file,
// but need user confirmation for that.
bool FileCreate(RAROptions *Cmd,File *NewFile,wchar *Name,size_t MaxNameSize,
                bool *UserReject,int64 FileSize,RarTime *FileTime,bool WriteOnly)
{
  if (UserReject!=NULL)
    *UserReject=false;
#ifdef _WIN_ALL
  bool ShortNameChanged=false;
#endif
  while (FileExist(Name))
  {
#if defined(_WIN_ALL)
    if (!ShortNameChanged)
    {
      // Avoid the infinite loop if UpdateExistingShortName returns
      // the same name.
      ShortNameChanged=true;

      // Maybe our long name matches the short name of existing file.
      // Let's check if we can change the short name.
      if (UpdateExistingShortName(Name))
        continue;
    }
    // Allow short name check again. It is necessary, because rename and
    // autorename below can change the name, so we need to check it again.
    ShortNameChanged=false;
#endif
    UIASKREP_RESULT Choice=uiAskReplaceEx(Cmd,Name,MaxNameSize,FileSize,FileTime,(NewFile==NULL ? UIASKREP_F_NORENAME:0));

    if (Choice==UIASKREP_R_REPLACE)
      break;
    if (Choice==UIASKREP_R_SKIP)
    {
      if (UserReject!=NULL)
        *UserReject=true;
      return false;
    }
    if (Choice==UIASKREP_R_CANCEL)
      ErrHandler.Exit(RARX_USERBREAK);
  }

  // Try to truncate the existing file first instead of delete,
  // so we preserve existing file permissions such as NTFS permissions.
  uint FileMode=WriteOnly ? FMF_WRITE|FMF_SHAREREAD:FMF_UPDATE|FMF_SHAREREAD;
  if (NewFile!=NULL && NewFile->Create(Name,FileMode))
    return true;

  CreatePath(Name,true);
  return NewFile!=NULL ? NewFile->Create(Name,FileMode):DelFile(Name);
}


bool GetAutoRenamedName(wchar *Name,size_t MaxNameSize)