Method createFile

lib/src/filesystem/fat/FatFileSystem.cpp:318–362

     */

    bool FatFileSystem::createFile(const char *filename) {

      FatDirectoryIterator *it;
      bool retval;

      // tokenise the path, must have a component

      TokenisedPathname tp(filename);
      if(tp.getNumTokens() == 0)
        return errorProvider.set(ErrorProvider::ERROR_PROVIDER_FILESYSTEM,E_INVALID_PATHNAME);

      // cannot create a file that exists

      if(getDirectoryIteratorPointingToFile(tp,it)) {
        delete it;
        return errorProvider.set(ErrorProvider::ERROR_PROVIDER_FILESYSTEM,E_FILE_EXISTS);
      }

      // limit the range so that we get an iterator on to the parent

      tp.resetRange();
      tp.setRange(0,tp.getNumTokens() - 2);

      if(!FatDirectoryIterator::getInstance(*this,tp,it))
        return false;

      // reset the range so that we can see the filename on the end

      tp.resetRange();

      // create the dirents for this new file

      LongNameDirentGenerator lndg(tp.last(),it->getDirectoryEntryIterator(),0,0);

      if(errorProvider.getLast() != 0) {
        delete it;
        return false;
      }

      // write the dirents to the owning directory

      retval=it->getDirectoryEntryIterator().writeDirents(lndg.getDirents(),lndg.getDirentCount());
      delete it;
      return retval;
    }

    /**
     * Open an existing file.