CallFormatIOProc

Call a format IO procedure

#include <Editions.h> Edition Manager

OSErr CallFormatIOProc ( selector, PB, routine);

FormatIOVerb selector; is set to one of the edition opener verbs

FormatIOParamBlock *PB ; contains a format I/O parameter block record

FormatIOProcPtr routine ; is a pointer to a format I/O procedure.

returns Error Code; 0=no error

Use the CallFormatIOProc function to call a format IO procedure.

selector is set to one of the format I/O verbs (ioHasFormat, ioReadFormat,

ioNewFormat, ioWriteFormat)

PB contains a format I/O parameter block record

routine is a pointer to a format I/O procedure.

Returns: an operating system Error Code.

noErr (0) No error

Notes: The I/O procedure is a routine that actually reads and writes the data. It

has an interface of a selector and a parameter block.

OSErr MyIO (FormatIOVerb selector, FormatIOParamBlock *pb);

To override the standard reading and writing functions, create an I/O

function. Note that you also need to provide your own opener function to call

your I/O function. See Calling an Edition Opener Procedure under

Subscribing to Non-Edition Files for more information on writing

an opener function. See Calling a Format I/O Procedure under

Subscribing to Non-Edition Files for more information on writing a

format I/O procedure.

Referenced by (3):