Re: [Patch] print-zeromq.c

[Guy Harris <guy () alum mit edu>]

On Mar 4, 2014, at 5:43 AM, François-Xavier Le Bail <fx.lebail () yahoo com> wrote:

> Is it not better to add const in the propotype ?

In what cases, if any, are parameters that are const (rather than non-const parameters that point to a const object) 
useful?

C is pass-by-value, so it's not as if the caller will see any changes the callee makes - i.e., the caller has no reason 
to care.

So declaring an argument as const amounts to a guarantee that the particular variable in question will, throughout the 
function, have the value that was passed in, so that somebody reading the code will know that it's not being 
manipulated throughout the function and doesn't have to, in the case of packet dissectors, think "wait, is this the 
length we were handed, or is it the length of the part of the packet that we haven't yet dissected"?
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