Structures and Pointers

[pskyboy]

Hey Guys

I have a really weird problem.

basically i have a structure which is made up of pointers which point to an array of structures. The pointers whithin each of these structures then points to a BYTE array on the freestore.

My problem is when i try and copy some data out of another buffer which is also on the freestore to these buffers i end up getting loads of crap in the buffers. I end up with all sorts of **** from the memory i mean i am getting stuff thats built into the program printed liek some of my error messages that are printed by messagebox's. Any ideas would be great

peter

[jim mcnamara]

1. your BYTE arraysmay not have been initialized to '\0' as string,
and 0 for nums. Use

memset(&array,'\0',sizeof(array) ) -
this initializes any integer variable to 0 and sets strings to zero-length.

2. your pointers are aimed to outerspace. Use assert.

3. You're taking chars --> DWORD as I recall,, so after playing around the buffers will have wierd stuff in them. Re-initalize if necessary.

Plus, you're completely sure that your BYTE arrays have valid data in them, right? See #4

4. if you mess with strings, string operations leave crud in memory after the trailing '\0' character, especially after several strcpy operations on the same piece of memory. File i/o's (like fgets) can leave \n at the tail of the string, too.

And it's not a weird problem at all, especially in C.