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Path: utzoo!watmath!clyde!burl!ulysses!allegra!mit-eddie!godot!harvard!seismo!brl-tgr!gwyn
From: gwyn@brl-tgr.ARPA (Doug Gwyn <gwyn>)
Newsgroups: net.bugs.usg
Subject: Re: PIC bug
Message-ID: <5490@brl-tgr.ARPA>
Date: Sun, 28-Oct-84 23:14:55 EST
Article-I.D.: brl-tgr.5490
Posted: Sun Oct 28 23:14:55 1984
Date-Received: Tue, 30-Oct-84 01:17:18 EST
References: <5334@brl-tgr.ARPA>
Distribution: net
Organization: Ballistic Research Lab
Lines: 21

> For anyone who is using the OLDTROFF flavor of PIC (the one that
> drives pre-Device Independent TROFF), one of the fellows here
> uncovered a bug.  In some cases, the DDAed dots output to simulate
> one of the graphic primitives (e.g., a line) will produce output
> text lines that are too long for other software such as "tbl".
> There is a test for this in the code but it is wrong.
> 
> Around line 518 in source file "pltroff.c", change
> 
> 	if (nput++ > 100) {	/* crude approx: troff input buffer ~ 400 */
> 
> to
> 
> 	/* DAG -- bug fix (100 is too much since h,v motions are interspersed) */
> 	if (nput++ > 40) {	/* crude approx: troff input buffer ~ 400 */

Oops, I miscounted characters (forgot that there could be minus signs).
I believe the following is correct but you could make it "25" to play safe:

	/* DAG -- bug fix (100 is too much since h,v motions are interspersed) */
	if (nput++ > 28) {	/* crude approx: troff input buffer ~ 400 */