Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!uwm.edu!zaphod.mps.ohio-state.edu!sol.ctr.columbia.edu!cica!iuvax!bsu-cs!mithomas
From: mithomas@bsu-cs.bsu.edu (Michael Thomas Niehaus)
Newsgroups: comp.sys.mac.programmer
Subject: Re: List Manager Strangeness
Message-ID: <10841@bsu-cs.bsu.edu>
Date: 27 Feb 90 22:40:19 GMT
References: <20392@bellcore.bellcore.com>
Reply-To: mithomas@bsu-cs.UUCP (Michael Thomas Niehaus)
Organization: CS Dept, Ball St U, Muncie, Indiana
Lines: 42

The following code is extracted from one of my programs.  Basically, it
goes through a list, comparing every entry against some given text.
(Actually, it does some wildcard expansion/comparison, but I hacked it
apart to do this instead.)

In this case, it hilites any entry in the list that equals "Helvitica".

	strcpy(&theText,"Helvitica");
        theCell.h=0;
	numRows=(**localList).dataBounds.bottom;
	for (i=0;i<numRows;i++)
	{
		dataLen=64;
		theCell.v=i;
		LGetCell(&listText,&dataLen,theCell,localList);
		listText[dataLen] = 0;
		if ( strcmp(&theText,&listText) == 0)
			LSetSelect(true,theCell,localList);
	}

There is one thing to point out in this routine (written in Think's C,
if anyone cares).  Both theText and listText are C strings.

For theText, this is done by the strcpy on the first line.  (I know, literals
are bad, but this is only an example.)

For listText, this is done by setting the character element after the end of
listText to 0, to signifiy the end of the string.  (The list manager does not
do this for you.  It just returns the text and the length and you have to
combine them.  I found that if you don't put that 0 on the end, your
comparison will almost always turn up false, unless by some stroke of luck
there was a 0 there anyway.)

Be careful that either both strings are C strings, or both are Pascal strings.
If they are C strings, make sure they are null-terminated.

-Michael

-- 
Michael Niehaus        UUCP: <backbones>!{iuvax,pur-ee}!bsu-cs!mithomas
Apple Student Rep      ARPA:  mithomas@bsu-cs.bsu.edu
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