Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!decwrl!sun!pitstop!sundc!seismo!uunet!lts!amanda
From: amanda@lts.UUCP (Amanda Walker)
Newsgroups: comp.sys.mac.programmer
Subject: Re: List Manager Problem
Message-ID: <936@lts.UUCP>
Date: 13 Mar 89 16:37:39 GMT
References: <11032@ut-emx.UUCP> <6704@hoptoad.uucp> <11103@ut-emx.UUCP> <6730@hoptoad.uucp> <27153@apple.Apple.COM> <6756@hoptoad.uucp>
Reply-To: amanda@lts.UUCP (Amanda Walker)
Organization: InterCon Systems Corporation, Reston, VA
Lines: 33

tim@hoptoad.UUCP (Tim Maroney) writes:
    In article <27153@apple.Apple.COM> han@Apple.COM
	(Byron Han, wyl E. coyote ) writes:
    >Stating that you must create a list via LNew with a nonzero number of
    >cells is incorrect.  I do it all the time with both standard and custom
    >LDEF's.
    
    Well, Byron, I've tried to do it time and again, as well as to remove
    cells in such a way that none are left in the list.  I get crashes when
    I create it with (0, 0, 1, 0), and display anomalies when I remove the
    last cell of a list that was created originally with (0, 0, 1, 1).  The
    crashes and anomalies go away when I make sure there is always one
    cell.  I've done this with both standard LDEF 0 and my own LDEFs, which
    I've been writing for years now.

Well, Tim, it must be you :-).  Like Byron, I've never had a problem, either
with the standard LDEF or with my own.  Here is a real live code fragment
(MPW C 3.0) from the program I am running on my Mac at this very moment:

    SetRect(&dataBounds,0,0,1,0);
    cSize.h = tempRect.right - tempRect.left;
    cSize.v = 16;
    localfiles = lnew(&tempRect,&dataBounds,&cSize,128,userftpdlog,1,0,0,1);
    LDoDraw(1, localfiles);

Perhaps if you could post a small piece of code that would duplicate the
crash, it might shed some light on the difficulty you're having...

-- 
Amanda Walker, InterCon Systems Corporation
amanda@lts.UUCP / ...!uunet!lts!amanda / 703.435.8170
--
C combines the flexibility of assembler with the power of assembler.