christy-
You need to actually get the record and check for equality. i.e.
/* use DmFindSortPosition here, passing it (amongst other things), &index *.
Boolean foundIt = false;
// guard against no match whilst sorting first
if (index > 0)
{
MemHandle h = DmQueryRecord(pDb, --index);
if (h)
{
MemPtr p = MemHandleLock(h);
foundIt = CompareIDFunc(p, &findRecord) == 0;
MemHanleUnlock(h);
}
}
if (foundIt)
{
/* do whatever you want here */
}
-----Original Message-----
From: christy [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, December 17, 2002 3:17 PM
To: Palm Developer Forum
Subject: RE: DmFindSortPosition question
Very good point. I modified the code to have the two
variables compare against each other.
I need to find a matching record from the databse (by
fid and sid pair). If there is a match, I can subtract
1 from the return-value of DmFindSortPosition.
However, how do I know that there is in fact no match
for fid + sid pair? DmFindSortPosition tells me the
next available position. It didn't indicate whether or
not a match is found. Am I using the wrong function
all together?
--- Robert McKenzie <[EMAIL PROTECTED]>
wrote:
> Just a guess, but because of possible wrapping /
> overflow problems, it is always safer to compare two
> values with each other rather than to subtract them
> and compare with 0.
>
> I.e.
> if (p1->fid < p2->fid) is better than if ((p1->fid
> - p2->fid) < 0)
>
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