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From: jtn@potomac.ads.com (John T. Nelson)
Newsgroups: comp.sys.mac.programmer
Subject: Can't seem to get SFGetFile to work....!
Message-ID: <9183@potomac.ads.com>
Date: 22 Sep 90 17:52:34 GMT
Organization: Advanced Decision Systems, Arlington VA
Lines: 81


This is going to sound ike a truly naive' question but I've been over
and over the problem and I can't seem to find where I'm going wrong.
Maybe it's someplace I'm not looking.  Here's the problem. The very
first thing I do in a program is call a function I call "selectFile"
which is basically a shell wrapped around SFGetFile....

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
 
#define		FILE_NAME_SIZE				30
#define		DEFAULT_DIALOG_X_POS		100
#define		DEFAULT_DIALOG_Y_POS		100
 
FILE	*fi, *fo;
char	buffer[128];
char	fileName[FILE_NAME_SIZE + 1];
 
main()
{
char	sourceFile[FILE_NAME_SIZE + 1];
 
selectFile(sourceFile);

.
.
.
}

Well the call to selectFile causes a Bus Error right on the SFGetFile
and I can't figure out why.  I've checked with other Macintosh books
("Using the Macintosh ToolBox with C", "Macintosh Revealed" and even
"Inside Macintosh") and the call looks kosher.  Problem is that even
the above three references vary on what they say should go into
SFGetFile.

By the way I'm using Lightspeed C with MacHeaders turned on and the
ANSI/unix/MacTraps libraries and it all compiles and links perfectly.

selectFile looks like this....


selectFile(char *name)
{
	char		fName[FILE_NAME_SIZE + 1];
	Point		position;
	int			numTypes;
	OSType		tList;			/* Was SFTypeList */
	SFReply		reply;
	int			workingVrefNum;
	Str255		prompt;
 
	numTypes = -1;
	SetPt(&position,DEFAULT_DIALOG_X_POS,DEFAULT_DIALOG_Y_POS);
	tList = '????';
 
	SFGetFile(position, "\p", 0L, numTypes, &tList, 0L, &reply);
 
	workingVrefNum = reply.vRefNum;
	SetVol(0L,reply.vRefNum);
 
	if ( reply.good ) {
		strcpy(fName, (char *) reply.fName);
		PtoCstr(fName);
		strcpy(name, fName);
		}
}

Help!



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