Pointer bounds checking

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Pointer bounds checking #282073 07/30/09 08:46 07/30/09 08:46
Joined: Dec 2008 Posts: 271 Saturnus OP Member
Saturnus OP Member Joined: Dec 2008 Posts: 271	Hello, I have an array allocated at runtime and I would like to check, if a pointer points to a location in memory that belongs to that array. Does somebody know how/if I can do that in lite-C? Thanks

Re: Pointer bounds checking [Re: Saturnus] #282079 07/30/09 09:30 07/30/09 09:30
Joined: Oct 2007 Posts: 5,211 Ä°stanbul, Turkey Quad Senior Expert
Quad Senior Expert Joined: Oct 2007 Posts: 5,211 Ä°stanbul, Turkey	yes you can skim thru the array in loop and chck all elements one by one, check if they're same with your pointer 3333333333

Re: Pointer bounds checking [solved] [Re: Quad] #282093 07/30/09 11:02 07/30/09 11:02
Joined: Dec 2008 Posts: 271 Saturnus OP Member
Saturnus OP Member Joined: Dec 2008 Posts: 271	Thank you, Quadraxas. Yes, this was possible. However, I was wondering if there was a more efficient way to do this. And indeed there is by just comparing the pointers. It's an obvious thing actually. : ) Code: int arr = malloc(sizeof(int) 100); int *ptr = &arr[50]; if ((ptr >= &arr[0]) && (ptr <= &arr[99])) printf("within bounds"); else printf("out of bounds");