I would check that the DmOpenDatabase calls are succeeding.
In particular, note that a database already opened for write access
can not be opened again (even by the same app) for write access.
-bob mckenzie
-----Original Message-----
From: Ed Lineberry [mailto:[EMAIL PROTECTED]]
Sent: Thursday, May 17, 2001 9:56 AM
To: Palm Developer Forum
Subject: Sort does not work consistently
I know I am missing something simple, but the more I look at this, the more
I can't understand why it doesn't work.
I have a DmCompareF function (see code at the bottom), and I call
DmQuickSort at three points in my application: when a record is saved,
when the app is reset, and when the app receives SynchNotify.
It only sorts the database of reset. The other occasions it does nothing.
What am I missing?
Below is all the relevant code I can think to include. I don't know where
I stole the AppHandleReset and AppHandleSync from, but one at least seems
to work.
Any help would be appreciated.
- Ed
static void AppHandleReset(void)
{
DmOpenRef dbTime;
DmOpenRef dbProj;
UInt16 mode;
UInt16 err;
// Find the application's data file.
mode = dmModeReadWrite;
dbTime = DmOpenDatabaseByTypeCreator(appDBType, appFileCreator, mode);
if (!dbTime)
return;
err = DmQuickSort( dbTime, (DmComparF *) CompareTimesheet, 0);
DmCloseDatabase(dbTime);
dbProj = DmOpenDatabaseByTypeCreator(projectsDBType, appFileCreator,
mode);
if (!dbProj)
return;
err = DmQuickSort( dbProj, (DmComparF *) CompareProject, 0);
DmCloseDatabase(dbProj);
}
static void AppHandleSync(void)
{
DmOpenRef dbTime;
DmOpenRef dbProj;
UInt16 mode;
UInt16 err;
// Find the application's data file.
mode = dmModeReadWrite;
dbTime = DmOpenDatabaseByTypeCreator(appDBType, appFileCreator, mode);
if (!dbTime)
return;
err = DmQuickSort( dbTime, (DmComparF *) CompareTimesheet, 0);
DmCloseDatabase(dbTime);
dbProj = DmOpenDatabaseByTypeCreator(projectsDBType, appFileCreator,
mode);
if (!dbProj)
return;
err = DmQuickSort( dbProj, (DmComparF *) CompareProject, 0);
DmCloseDatabase(dbProj);
}
static int CompareTimesheet( PackedTimesheet *ts1, PackedTimesheet *ts2,
Int unusedInt, SortRecordInfoPtr unused1, SortRecordInfoPtr unused2,
VoidHand appInfoH )
{
int result;
result = (ts1->date < ts2->date);
return result;
}
/
UInt32 PilotMain( UInt16 cmd, MemPtr cmdPBP, UInt16 launchFlags)
{
Err error;
error = RomVersionCompatible(version20, launchFlags);
if (error)
return error;
switch (cmd) {
case sysAppLaunchCmdNormalLaunch:
[snip]
case sysAppLaunchCmdSyncNotify:
AppHandleSync();
break;
case sysAppLaunchCmdSaveData:
FrmSaveAllForms();
break;
case sysAppLaunchCmdInitDatabase:
break;
case sysAppLaunchCmdSystemReset:
AppHandleReset();
break;
default:
break;
}
return 0;
}
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