SHORTNAME_LENGTH
u_char toShortName[SHORTNAME_CSTRING], oldShortNameArray[SHORTNAME_LENGTH];
memcpy(oldShortNameArray, fromFatNode->de_Name, SHORTNAME_LENGTH);
memcpy(fromFatNode->de_Name, toShortName, SHORTNAME_LENGTH); // update denode
memcpy(fromFatNode->de_Name, oldShortNameArray, SHORTNAME_LENGTH);
memcpy(fromFatNode->de_Name, oldShortNameArray, SHORTNAME_LENGTH);