Path: utzoo!mnetor!tmsoft!torsqnt!news-server.csri.toronto.edu!rpi!usc!samsung!think.com!barmar
From: barmar@think.com (Barry Margolin)
Newsgroups: comp.unix.questions
Subject: Re: ASCII question
Message-ID: <1991Mar27.224615.21902@Think.COM>
Date: 27 Mar 91 22:46:15 GMT
References: <1270@caslon.cs.arizona.edu>
Sender: news@Think.COM
Organization: Thinking Machines Corporation, Cambridge MA, USA
Lines: 24

In article <1270@caslon.cs.arizona.edu> andrew@cs.arizona.edu (Andrei V. Zaitsev) writes:
>I have a question about ASCII code. Can I be sure that character
>with code 13 will return cursor to the beginning of the line
>independently of the terminal type ?

If you're willing to assume that you're talking to an ASCII terminal you
should be pretty safe.  Then again, any ASCII system that supports
non-ASCII terminals probably also has a tty driver that automatically
converts from ASCII; however, if your program writes in raw mode this
conversion would be bypassed.

You're also probably safer using '\r' rather than '\015', since the former
will work properly on a system that uses something other than ASCII
internally.

Some terminals can be configured to perform a line feed automatically after
receiving carriage return.  However, since most Unix software doesn't
expect this, it's safe to assume that the terminal is not in this mode.

--
Barry Margolin, Thinking Machines Corp.

barmar@think.com
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