> -----Original Message-----
> From: Jim Schram [mailto:[EMAIL PROTECTED]]
>
> At 10:40 AM -0800 1999/03/22, Michael S. Davis wrote:
> >So that would mean that the Compare functions would have to have
> >a specified parameter format? Where is that format (of the compare
> >function) parameters list defined?
>
> Looking up DmQuickSort in the manual says...
>
> "The comparison function, compar, accepts two arguments, elem1
> and elem2, each a pointer to an entry in the table. The comparison
> function compares each of the pointed-to items (*elem1 and
> *elem2), and returns an integer based on the result of the
> comparison."
>
> Seems simple enough, but it doesn't fully describe the
> comparison routine. Huh. Guess the docs could use a bit more detail...
>
> Looking for DmComparF in DataMgr.h we find:
>
> typedef Int DmComparF (void *, void *, Int other,
> SortRecordInfoPtr, SortRecordInfoPtr,
> VoidHand appInfoH);
>
> The first two 'void *' params are pointers to the records to
> be compared.
>
> The 'other' param is an integer value passed from
> DmQuickSort or DmInsertionSort down into the comparison
> function (usually this is used to indicate a sort direction).
>
> The next two 'SortRecordInfoPtr' params are pointers to the
> sort info of the two records (structs containing the record's
> attributes and uniqueID).
Some more information about these params would be of use.
> The last param 'appInfoH' is the app info handle of the
> database being sorted.
>
> The comparison function must return -1 if the first 'void *'
> is less than the second 'void *', 0 if they're both
> equivalent, or 1 if the second 'void *' is greater than the
> first 'void *'.
>
>
> Hope that helps!
>
So far, so good ... but I would like a little more.
--
-Richard M. Hartman
[EMAIL PROTECTED]
186,000 mi./sec ... not just a good idea, it's the LAW!
