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From: lsr@apple.UUCP (Larry Rosenstein)
Newsgroups: comp.sys.mac
Subject: Re: obtaining the full pathname of a file
Message-ID: <1022@apple.UUCP>
Date: Fri, 12-Jun-87 19:12:54 EDT
Article-I.D.: apple.1022
Posted: Fri Jun 12 19:12:54 1987
Date-Received: Sun, 21-Jun-87 01:44:07 EDT
References: <1345@batcomputer.tn.cornell.edu> <1007@apple.UUCP> <204@drilex.UUCP>
Reply-To: lsr@apple.UUCP (Larry Rosenstein)
Organization: Advanced Technology Group, Apple Computer
Lines: 140

In article <204@drilex.UUCP> dricej@drilex.UUCP (Craig Jackson) writes:
>this.  Does anyone have any working code that they code post? (C, Pascal?)
>Does MacApp provide this facility?

MacApp doesn't provide this.  I wrote some code, which I have included
below.  (This was taken from an early version of the StdFile MPW tool, which
comes with MPW 2.0.)

IEString is a string type that is defined in the MPW integrated environment
unit.  This code doesn't check to see if your final pathname exceeds 255
characters.  This code did work, but I don't guarantee that I didn't make
any mistakes while pulling it out of the program.


Larry Rosenstein

UUCP:  {sun, voder, nsc, mtxinu, dual}!apple!lsr
CSNET: lsr@Apple.com

*******************************

VAR
	gotHFS:			BOOLEAN;
{ Setting the above variable is left as an exercise for the reader. }


{ Given a working directory refnum, return the volume refnum and dirID.
	This assumes that HFS is installed on the machine.  }

FUNCTION  GetDirID(VAR vRefnum: INTEGER; VAR dirID: LONGINT): OSErr;
VAR	pb:	WDPBRec;
	
BEGIN
WITH pb DO
	BEGIN
	ioCompletion := NIL;
	ioNamePtr := NIL;
	ioVRefnum := vRefnum;
	ioWDIndex := 0;
	ioWDProcID := 0;
	ioWDVRefnum := vRefnum;
	END;
GetDirID := PBGetWDInfo(@pb, FALSE);
vRefnum := pb.ioWDVRefnum;
dirID := pb.ioWDDirID;
END;


{ Given a volume refnum and dirID, return name of the volume / folder.  This
	routine assumes that HFS is installed on the machine. }
	
FUNCTION  DirID2Name(vRefnum: INTEGER; dirID: LONGINT; 
						VAR name: IEString): OSErr;
VAR	pb:	CInfoPBRec;
	temp:	Str255;
	err:	OSErr;
BEGIN
name := '';
err := noErr;

WITH pb DO
	BEGIN
	ioCompletion := NIL;
	ioNamePtr := @temp;
	ioVRefnum := vRefnum;
	ioDrDirID := dirID;
	END;
	
REPEAT
	pb.ioFDirIndex := -1;		{ get info about directory ioDirID }
	err := PBGetCatInfo(@pb, FALSE);
	IF err = noErr THEN
		BEGIN
		name := Concat(temp, ':', name);
		
		IF pb.ioDrDirID = 2 THEN { root directory }
			pb.ioDrDirID := 0
		ELSE
			pb.ioDrDirID := pb.ioDrParID;
		END;
UNTIL (err <> noErr) | (pb.ioDrDirID = 0);
DirID2Name := err;
END;


{ Given a volume or WD refnum, return name of the volume / folder. 
	This can be called whether or not HFS exists. 
This is the primary procedure that you would call from your program. }
	
FUNCTION  GetFolderName(vRefnum: INTEGER; VAR name: IEString): OSErr;
VAR	pb:		CInfoPBRec;
	temp:	Str255;
	err:	OSErr;
	dirID:	LONGINT;
	i:		INTEGER;
	len:	INTEGER;
		
BEGIN
name := '';
err := noErr;

IF gotHFS THEN { find the dirID, and get the full pathname }
	BEGIN
	err := GetDirID(vRefnum, dirID);
	
	IF err = noErr THEN
		GetFolderName := DirID2Name(vRefnum, dirID, name);
	END
ELSE { no HFS, just get the volume name }
	BEGIN
	temp := '';
	WITH pb DO
		BEGIN
		ioCompletion := NIL;
		ioNamePtr := @temp;
		ioVRefnum := vRefnum;
		ioFDirIndex := 0;
		ioDrDirID := 0;
		END;
		
	err := PBGetVInfo(@pb, FALSE);
	IF err = noErr THEN
		name := Concat(temp, ':');
	END;

GetFolderName := err;
END;


***** END OF CODE *****

-- 
Larry Rosenstein

Object Specialist
Apple Computer

AppleLink: Rosenstein1
UUCP:  {sun, voder, nsc, mtxinu, dual}!apple!lsr
CSNET: lsr@Apple.com