Struct with fixed-length array member - is it possible?

Hello,


Can you provide some hints on how would you solve a problem like this? I'm
out of ideas...
Here's the problem: Let's imagine a C structure containing a fixed-size
array

struct XYZ
{
int V1;
int V2;
double V3[50];
};

This structure, when allocated, occupies a contiguous block of memory (408
bytes in my compiler).
Now I would like to have the same structure in C#, such that it would have
THE SAME MEMORY LAYOUT as the C structure. The memory size does not need to
be identical as in C, but the structure should occupy a single memory block
and all data, including the array, should be placed in this block.

There is no possibility in C# to declare a fixed-size array and to 'embed'
it completely in a struct. When I make a declaration like this:

public struct XYZ
{
int V1;
int V2;
double[] V3;
}

the V3 member is a reference to array object, not the array itself.
Can you think of any way to get the C/C++ layout?

Best Regards,
Rafal Gwizdala

Daniel
Mon Apr 18 22:01:29 CDT 2005


"Rafal Gwizdala" <gwrafal@poczta.onet.pl> wrote in message
news:uD0e2CGRFHA.1172@TK2MSFTNGP12.phx.gbl...
> Hello,
>
>
> Can you provide some hints on how would you solve a problem like this? I'm
> out of ideas...
> Here's the problem: Let's imagine a C structure containing a fixed-size
> array
>
> struct XYZ
> {
> int V1;
> int V2;
> double V3[50];
> };
>
> This structure, when allocated, occupies a contiguous block of memory (408
> bytes in my compiler).
> Now I would like to have the same structure in C#, such that it would have
> THE SAME MEMORY LAYOUT as the C structure. The memory size does not need
> to be identical as in C, but the structure should occupy a single memory
> block and all data, including the array, should be placed in this block.
>
> There is no possibility in C# to declare a fixed-size array and to 'embed'
> it completely in a struct. When I make a declaration like this:
>
> public struct XYZ
> {
> int V1;
> int V2;
> double[] V3;
> }
>

2.0 offers this, finally, using the fixed keyword


public stuct XYZ
{
fixed double V3[50];
}

This requires unsafe code, however.