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Path: utzoo!mnetor!seismo!mimsy!aplcen!cp1!bpa!cbmvax!andy
From: andy@cbmvax.cbm.UUCP (Andy Finkel)
Newsgroups: comp.sys.amiga
Subject: Re: Bug in console.device?
Message-ID: <1044@cbmvax.cbmvax.cbm.UUCP>
Date: Wed, 3-Dec-86 10:56:08 EST
Article-I.D.: cbmvax.1044
Posted: Wed Dec  3 10:56:08 1986
Date-Received: Thu, 4-Dec-86 06:13:58 EST
References: <791@ulowell.UUCP>
Reply-To: andy@cbmvax.UUCP (Andy Finkel)
Distribution: net
Organization: Commodore Technology, West Chester, PA
Lines: 47

In article <791@ulowell.UUCP> page@ulowell.UUCP (Bob Page) writes:
>When I use some escape sequences to move the cursor (like CSInD to move
>the cursor back n spaces), the cursor moves across line boundaries like
>you would expect.  For example, if I want to move across a word that is
>split between lines because the end of the window cuts it, it will do
>so correctly.
>
>However, the delete character (CSInP) command does not cross line
>boundaries.  In fact, if I'm at column 70 of 77 and say 'CSI10P' to
>delete 10 characters, it deletes the first 8 (70 through 77) as expected
>but then instead of deleting 0, 1 and 2 of the next line, it deletes
>69, 68 and 67 of the same line!
>
>Is this a bug, or a feature?  I would say a bug, since the whole idea
>of 'console' device is that it is a virtual terminal, and the program
>should not have to constantly worry about what size the window is.
>
There are actually 2 bugs here...the first is that the cursor moves across
line boundaries, when moved with the cursor commands.  According to my
VT101, this is wrong.

The second is the way it deletes when it hits the end of line.
As you noticed, it then deletes too much.

>Sigh.  My only regret (besides the fact that now I have to write
>code to emulate what the console.device should be doing) is that I
>just found this, and two months ago it might have been fixed in time
>for V1.2.
>

me too.  (sigh)
>..Bob

			andy finkel

-- 

			andy finkel
			Commodore/Amiga
			{ihnp4|seismo|allegra}!cbmvax!andy
		or	 pyramid!amiga!andy

Any expressed opinions are mine; but feel free to share.

I disclaim all responsibilities, all shapes, all sizes, all colors.

"Never make anything simple and efficient when it can be complex and wonderful."