On 03-Aug-99 [EMAIL PROTECTED] wrote:
> I'd like to use DmGetNextDatabaseByTypeCreator to collect information about
> all "appl" databases on the Palm. I have defined a structure to hold the
> card number, local id and name of the databases that are found during the
> search. Being new to Palm programming, I'm not sure the best way to allocate
> memory for the search using the fewest resizes, locks and unlocks. Having
> no idea how big the result will be means I can't allocate a specific size
> array. How do people do this? Can someone suggest a design for this type
> of thing on the Palm?
Much quicker to use SysCreateDataBaseList(). A short example of how to build
the list, iterate through the array, and then free it.
SysDBListItemType *listP;
Word AppsPopupCount;
Handle AppsPopupH;
short i1;
ULong curcreator;
Int curSelection=-1;
if (!SysCreateDataBaseList(sysFileTApplication, 0, &AppsPopupCount,
&AppsPopupH, true)) {
AppsPopupCount = 0;
AppsPopupH = 0;
} else {
/* Figure out the current selection by comparing the creator ID's */
listP = MemHandleLock((VoidHand) AppsPopupH);
for (i1=0; i1 < AppsPopupCount; i1++) {
if (listP[i1].creator == curcreator) {
curSelection = i1;
break;
}
}
MemPtrUnlock(listP);
}
if (AppsPopupH) MemHandleFree((VoidHand) AppsPopupH);
Take a look at the SysDBListItemType, it has the same information you want:
typedef struct
{
Char name[dmDBNameLength];
ULong creator;
ULong type;
UInt version;
LocalID dbID;
UInt cardNo;
BitmapPtr iconP;
} SysDBListItemType;
/* Chris Faherty <[EMAIL PROTECTED]>, finger for PGP */
