HFileInfo is an API structure from the "classic" Mac OS

Mac OS

Mac OS is a series of graphical user interface-based operating systems developed by Apple Inc. for their Macintosh line of computer systems. The Macintosh user experience is credited with popularizing the graphical user interface...

 that exposes information about a file stored in Apple

Apple Computer

Apple Inc. is an American multinational corporation that designs and markets consumer electronics, computer software, and personal computers. The company's best-known hardware products include the Macintosh line of computers, the iPod, the iPhone and the iPad...

's Hierarchical File System

Hierarchical File System

Hierarchical File System is a file system developed by Apple Inc. for use in computer systems running Mac OS. Originally designed for use on floppy and hard disks, it can also be found on read-only media such as CD-ROMs...

 (HFS) on a Macintosh computer. It was replaced by FSCatalogInfo.

The structure maintains information such as a file's length (both resource and data forks), the dates of creation and modification, as well as 16 bytes of information used by the Finder for file type and creator codes, label information, icon pointers, and other ancilary information. In the C Programming Language the structure looks like this:

struct HFileInfo {

  QElemPtr            qLink;                  /*queue link in header*/

  short               qType;                  /*type byte for safety check*/

  short               ioTrap;                 /*FS: the Trap*/

  Ptr                 ioCmdAddr;              /*FS: address to dispatch to*/

  IOCompletionUPP     ioCompletion;           /*completion routine addr (0 for synch calls)*/

  volatile OSErr      ioResult;               /*result code*/

  StringPtr           ioNamePtr;              /*ptr to Vol:FileName string*/

  short               ioVRefNum;              /*volume refnum (DrvNum for Eject and MountVol)*/

  short               ioFRefNum;

  SInt8               ioFVersNum;

  SInt8               filler1;

  short               ioFDirIndex;

  SInt8               ioFlAttrib;

  SInt8               ioACUser;

  FInfo               ioFlFndrInfo;

  long                ioDirID;

  unsigned short      ioFlStBlk;

  long                ioFlLgLen;

  long                ioFlPyLen;

  unsigned short      ioFlRStBlk;

  long                ioFlRLgLen;

  long                ioFlRPyLen;

  unsigned long       ioFlCrDat;

  unsigned long       ioFlMdDat;

  unsigned long       ioFlBkDat;

  FXInfo              ioFlXFndrInfo;          /* type, creator, labels, icons, window arrangements */

  long                ioFlParID;

  long                ioFlClpSiz;

};

External links

• File Manager Reference - at developer.apple.com