pic bug

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Article #4616

#4616

From: Richard Stevens
Date: Thu, 14 Apr 1988 21:14

25 lines
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I've encountered the following bug in pic, and was wondering if
anyone has a fix.  I'm using the pic that came with DWB 2.0.

Arrows in pic that go straight down or straight up have the head
of the arrow shifted slightly to the left.  For example,

         |                               |
         |                               |
       \ | /                            \|  /
        \|/                              \ /

      correct           this is what the bug produces (exaggerated)

The bug appears to be in the latest AT&T Release (i.e., DWB 2.0),
as I've found, [see also p. 345 of Bach "The Design of the UNIX
Operating System"] but was fixed sometime in Version 8 [see p. 313
of Kernighan and Pike for the bug, but see also p. 111 of Bentley's
"Programming Pearls" for a fixed version] and is fixed in Version 9
[see p. 173 of "The AWK Programming Language" by A. K. and W.].

Does anyone have a fix ??  Thanks.

	Richard Stevens
	Health Systems International, New Haven, CT
           { uunet | ihnp4 } ! hsi ! stevens

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Path: arc1-ca.pugleaf.net!utzoo!mnetor!uunet!mfci!hsi!stevens
From: stevens@hsi.UUCP (Richard Stevens)
Newsgroups: comp.text
Subject: pic bug
Message-ID: <921@hsi.UUCP>
Date: 14 Apr 88 21:14:18 GMT
Organization: Health Systems Intl., New Haven, CT
Lines: 25
Keywords: pic