> I desperately need a little debugging help.
well, this one is easy (even if i have had a few beers) :P
> Can anyone tell me why this would bomb (Fatal Exception)? Here's the
> struct and then the code fragment...
sure.. easy :)
> struct tDocRecord0 {
> byte crap; // because of some flaw in some docs.
> byte wVersion; // 1=plain text, 2=compressed
> WORD wSpare;
> DWORD dwStoryLen; // in bytes, when decompressed
> WORD wNumRecs; // text records only; =tDocHeader.wNumRecs-1
> WORD wRecSize; // usually 0x1000
> DWORD dwSpare2;
> };
>
> Boolean SaveEBook(UInt16 cardNo, char *Filename, UInt32 length)
> {
> VoidHand RecHandle;
> Ptr RecPointer;
> struct tDocRecord0 *theRec;
> Err theErr;
> LocalID db;
>
> theErr = DmCreateDatabase(cardNo, Filename, 'REAd', 'Deep',
> false);
> if (theErr == errNone) {
>
> if (db) zDB = DmOpenDatabase(cardNo, db, dmModeReadWrite);
> else {
> FrmCustomAlert(DebugAlert, "Couldn't find db!",0, 0);
> return(false);
> }
>
> if (zDB == NULL) return(false);
>
> theRec->wVersion = (byte) 1
> theRec->dwStoryLen = length; // <= Bombs here.
> theRec->wNumRecs = (WORD) 2;
> theRec->wRecSize = (WORD) 4096;
> theRec->crap = (byte) 0;
> theRec->wSpare = (WORD)0;
> theRec->dwSpare2 = (DWORD)0;
>
> ...
>
> It is bombing right at the "theRec->dwStoryLen = length;" moment.
> I've tried casting it as "theRec->dwStoryLen = (DWORD) length;" as
> well. Both Fatal Exception on me if the length is greater than 1000
> (1024?) or so. (Well, I've seen it succeed at 600, 800 or so, and
> then explode every time at 1400 or so.) I keep thinking there must be
> something else going on, but my debugging attempts so far only narrow
> down to this point! Am I doing something stupid??? (I must be, but
> dang if I can figure it out.)
where do you allocate the space for theRec? :) maybe time for a:
theRec = MemPtrNew(...);
i dont see anywhere above that code where you set the reference
to a chunk, or even allocate the memory for it :) that might
be your problem *g* - you'll find it'll complain about writing
to an unallocated chunk of memory somewhere :p
see you at palmsource zane :)
// az "my task is done here"
[EMAIL PROTECTED]
http://www.ardiri.com/
--
For information on using the Palm Developer Forums, or to unsubscribe, please see
http://www.palmos.com/dev/tech/support/forums/
