Can't tell. send soil samples.
you need to send the snippets of code.
Most likely, buffer is declared either as a local variable or as static
in the first or second file/function or bot. Therefore you really have
two variables named buffer, not one.
bug
On Thu, 18 Mar 1999, compiler wrote:
> Why does this happen? : I send a char * to a function and if certain
> conditions are true, it is assigned NULL and then returns from that
> function, but when I check to see if it's NULL, I find out that it's back
> to what it was before! Why? Here's the gdb snapshot to show what I am
> talking about.
>
> 52 ptr = strstr(haystack,needle); <-- This is suppose to return NULL
> 1: buffer = 0x804aa80 "" <-- What it starts out as
> (gdb) next
> 53 if (ptr == NULL) {
> 1: buffer = 0x804aa80 ""
> (gdb) print ptr
> $1 = 0x0
> (gdb) next
> 54 buffer = NULL;
> 1: buffer = 0x804aa80 ""
> (gdb) next
> 55 return;
> 1: buffer = 0x0 <-- Right.
> (gdb) next
> 83 } // END FUNCTION
> 1: buffer = 0x0 <-- Still OK.
> (gdb) next
> main () at sendmessage.c:177
> 177 if (buffer == NULL) {
> (gdb) print buffer
> $2 = 0x804aa80 "" <-- It changes back!
> (gdb)
>
>
>
