Can someone give me an idea as to what could be causing this error?
Fatal Error
DataMgr.c Line:6294,
DmWrite:DmWriteCheck
failed
I'm currently working on submitting information to the database. I have it
working, but now I need to modify the memory allocation for my strings, etc.
when submitting data of varying lengths to the database. I rewrote my
current function, with one based off the Expense Database sample code.
This is basically it. I'm trying to tackle strings right now... I'll expand
upon this later.
Any suggestions would be greatly appreciated.
void SetGeneral(FormPtr frm)
{
tblInfo theInfo;
UInt curSize, newSize;
VoidHand record = DmQueryRecord(gInfoDB, 0);
tblPackedInfoPtr p = MemHandleLock(record);
curSize = MemPtrSize(p);
UnpackInfo( &theInfo, p);
newSize = curSize;
newSize += StrLen(FldGetTextPtr(FrmGetObjectPtr(frm,
FrmGetObjectIndex(frm, NfoGeneralTripNumberField)))) -
StrLen(theInfo.TripNumber);
if(newSize > curSize)
{
MemPtrUnlock(p);
MemHandleResize(record, newSize);
p = MemHandleLock(record);
UnpackInfo(&theInfo, p);
}
ChangeRecordField(p, curSize, FldGetTextPtr(FrmGetObjectPtr(frm,
FrmGetObjectIndex(frm, NfoGeneralTripNumberField))), theInfo.TripNumber);
if(newSize < curSize)
MemPtrResize(p, newSize);
MemPtrUnlock(p);
}
static void ChangeRecordField(tblPackedInfoPtr src, ULong size, VoidPtr
data, CharPtr field)
{
ULong offset;
ULong bytes;
CharPtr ptr;
// Move the rest of the record
offset = (field - (CharPtr)src) + StrLen(data) + 1;
ptr = field + StrLen(field) + 1;
bytes = size - (ULong)(ptr - (CharPtr)src);
if(bytes)
DmWrite(src, offset, ptr, bytes);
// Write the new field
offset = (field - (CharPtr)src);
DmStrCopy(src, offset, data);
}
--
Tim Astle
--
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