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/
