Newsgroups: comp.sys.mac.programmer
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!batcomputer!cornell!uw-beaver!steelhead.cs.washington.edu!chou
From: chou@steelhead.cs.washington.edu (Pai Hsiang Chou)
Subject: Re: Numbers from TEXT files under Think C ?
Message-ID: <1991Apr22.142357.18338@beaver.cs.washington.edu>
Sender: news@beaver.cs.washington.edu (USENET News System)
Reply-To: chou@cs.washington.edu (Pai Hsiang Chou)
Organization: Computer Science & Engineering, U. of Washington, Seattle
References: <17150002@hpihoah.cup.hp.com> <4978@cernvax.cern.ch>
Date: Mon, 22 Apr 91 14:23:57 GMT

In article <4978@cernvax.cern.ch> marty@cernvax.cern.ch (hugues marty) writes:
>In article <17150002@hpihoah.cup.hp.com> cring@hpihoah.cup.hp.com (Craig Ring) writes:
>>I am writing a program in Think C 4.0 that needs to read numeric input from
>>an ASCII text file.  Under UNIX this is very easy to do with fscanf() and so
>>on.  Is there a simple way to do this with a Macintosh?  
>>
>>I would like to be able to use SFGetFile() to allow the user to pick the
>>file they would like to open, but the SFReply doesn't seem to be very useful
>>to the ANSI C libraries for Think C.  The Think C documentation says that
>>scanf() requires a pointer to type FILE, which I am not sure how to get.

How about fopen() with the filename?

>One way is to call SFGetFile(), then geting the whole path name
>for the selected file (for example "HD:folder 1:document") and passing
>this string to the fopen() function which will return a FILE *.
>The problem is how to get the file path... and I don't have
>a sample code off-hand. If you have access to technical notes,
>this is documented in TN 238 (Getting a full pathname).

No, it's not a good idea (and not necessary) to use the full path name.
There is a much simpler way.

	FILE *f;
	/* your SFGetFile() or SFPutFile() stuff */
	if (sfreply.good) {
		char name[64];
		SetVol(NULL,sfreply.vRefNum); /* set correct directory */

		/* some procedure which copies a Pascal str to a C str */
		PasToCStr(sfreply.fName, name);

		f = fopen(name, "r");
		...

Pai Chou
chou@june.cs.washington.edu