Re: C Strings in Ada?

[adoyle@bbn.com (Allan Doyle)]

In article <EMERY.90Jun11135320@scorpio.linus.mitre.org>
 emery@linus.mitre.org (David Emery) writes:
>Allan Doyle writes
>>If I take the worst case assumption that c_string
>>is being allocated from the heap and add it to the worst case assumption
>>that my Ada run-time will not be doing garbage collection (perfectly legal,
>>I understand), then how many of these little beasties can I convert from
>>Ada to C before I run out of memory?
>
>It's not clear to me that you can guarantee with a C compiler that
>there is not some compiler-generated heap, either.  Does the C
>LANGUAGE guarantee non-heap allocation for a local variable???    Or
>does "everyone knows that's how it's done?"
>
> 				dave emery
>				emery@aries.mitre.org


Touche' - I just looked in K&R and found no statement concerning
automatic variables and the memory they occupy. It only states that
the variables "disappear" from scope.

By the way, the example I gave in the previous post:

	declare
		c_string : constant string := "foo" & ascii.nul;

would take up heap in C as well. I really meant 

	proc(foo: string) is
		c_string : constant string := foo & ascii.nul;
	...

which everybody "knows" will go on the stack in C...(sigh)





Allan Doyle                                        adoyle@bbn.com
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