The problem is DmGetNextDatabaseByTypeCreator returns errNone (aka 0)
when successful, and a non-zero value when there are no (more) matching
databases. So the if statement and while loop are using the logical
opposite of what you want.
Somehow I missed that one when I went through the "bible." My copy has
the exact same mistake in it.
- PK
Richard Coutts wrote:
> I'm writing my first database code. I copied this simple function out of
> the Palm OS Programming Bible, but its not returning. Or, it wasn't until I
> made it quit when the count rose to 10000. It seems so straight forward,
> I'm at a loss what's going on. Any insight would be greatly appreciated.
>
> Thanks!
> Rich
>
> // The function call looks like this:
> Int16 count = CountDBs('DATA', 'PCAD');
>
> // Count the number of Databases
> Int16
> CountDBs(UInt32 type, UInt32 creator) {
> // (code from "Bible" pg. 385
> DmSearchStateType searchState;
> Int16 count = 0;
> UInt16 cardNo;
> LocalID dbID;
>
> if (DmGetNextDatabaseByTypeCreator(true, &searchState,
> type, creator, false, &cardNo, &dbID)
> {
> do {
> count++;
> } while (count < 10000 && DmGetNextDatabaseByTypeCreator(false,
> &searchState,
> type, creator, false, &cardNo, &dbID));
> }
> return count;
> }
>
>
>
>
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