cast a C char array - offset ?

[Mike Parker via Digitalmars-d-learn]

On 2/2/2015 9:16 PM, irtcupc wrote:
> The manual section about interfacing from c states that "type[]" is
> inter-compatible from C to D,
>
> however, I face this strange case:
>
> - C declaration:
> char identifier[64];
>
> - D declaration:
> char[64] identifier;
>
> - the result is only correct if i slice by (- pointer size):
> char[64] fromC(char[64] * thing)
> {
>      const offs = size_t.sizeof;
>      return thing[-offs.sizeof .. $-offs];
> }
>
> Is this correct ?

That's looking pretty wonky. You're slicing a pointer to a fixed-size 
array. Why have you declared the parameter as a pointer? What problem 
are you trying to solve? It would help a bit to see the declaration of 
the C function that's giving you the array.