Thanks for the advice. So in future, would I be safe assuming that if C does something a certain way, the same will hold true on the Palm platform?
Cheers, Joe --- Keith Rollin <[EMAIL PROTECTED]> wrote: > Joe, > > This is a generic C programming question. It is not > specific to Palm OS or its development tools, so you > should probably post questions like this in a "how > to program in C" forum. > > In short, static structs (that is, those created as > global variables or as statics local to a function) > have their fields initialized to zero when the > application starts. Automatic structs (that is, > those created as local variables) or structs > allocated with malloc or MemPtrNew will have garbage > in their fields. It is up to you to initialize them > to appropriate values after you've allocated the > memory for them. > > There is no supported method for determining if a > pointer type contains a valid or invalid value. > > -- Keith > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] > Behalf Of joe > bloggs > Sent: Saturday, March 27, 2004 6:37 PM > To: Palm Developer Forum > Subject: Structure initialisation > > > Hello Forum, > > When a structure is created, does anyone know if > it's > elements are initialised? e.g. initegers set to 0 > and > pointers/references set to NULL. > > The reason I am asking is that my error handling > code > deallocates memory by checking if mem pointers are > not > NULL. If structure elements are initialised, I can > check to see if memory has been allocated as > follows: > > if (someStruct.memPointer) > ... > > If structure elements are not initialised, can > anyone > recommend a way to determine if a pointer is > pointing > to allocated memory (instead of just garbage). > > -- > For information on using the Palm Developer Forums, > or to unsubscribe, please see http://www.palmos.com/dev/support/forums/ Find local movie times and trailers on Yahoo! Movies. http://au.movies.yahoo.com -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
