Re: Regarding assignment to struct

On Tue, 6 May 2025 11:46:21 +0200
David Brown <david.brown@hesbynett.no> wibbled:

On 05/05/2025 22:53, Keith Thompson wrote:

Muttley@dastardlyhq.com writes:
[...]

If you twant o pass an actual array to a function instead of a pointer to

it,

embedding it in a structure is the only way to do it.

 
Yes, but that's not necessarily useful.  An array that's a member
of a struct can only be of a constant length (unless it's a flexible
array member, but that doesn't help).  Functions that work with
arrays typically need to deal with arrays of arbitrary length.
 

>
I regularly use arrays with known fixed sizes.  In fact, in my code
those are absolutely dominant - it is very rare for me to see or use an
array whose size is /not/ fixed at compile time.  Sometimes I will have

I do a lot of networking code and with packet structures the arrays are
almost always of fixed size. Also with arrays the data is inline so a simple
memcpy() can copy the data from the struct to the output buffer. You can't
do that if you have pointers in the struct. Ditto a simple cast to char * to
use it directly as the ouput.