Array of Structs, with initialized members

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thrawn235

Joined: 26 Oct 2017
Posts: 2

thrawn235 26 Oct 2017, 17:38

Hello,
I've read the online docs and searched the forum for a bit but i wasn't able to find an answer.

I wan to create a array of structs that are initialized like that:

Code:

STRUC cell
{
    .value db 16      ;values are important!
    .value2 db 25
}
SEGMENT memory
cells dup 20 (cell)

I've tried quite a few things, but nothing seems to work. In another thread i found the idea to reserve 20 * cell.size bytes. but that would either have random data in it, or it would be relatively bothersome for more complex classes with 20+ members (like cells 20 dup (16,25,...).

maybe i'm just not seeing the obvious...

26 Oct 2017, 17:38

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20451
Location: In your JS exploiting you and your system

revolution 26 Oct 2017, 17:57

You will need a bit more programming to do what you need. One thing to realise is that struc is really a macro that requires a leading label. So it is not possible to use it in the operands of anything.

A couple of methods would be to use a repeat loop, or a rept loop depending upon your requirements.

Code:

struc cell {
 ;... definition goes here
}

cells cell
  rept 19 {
    forward
    local dummy_label
    dummy_label cell
  }

26 Oct 2017, 17:57

thrawn235

Joined: 26 Oct 2017
Posts: 2

thrawn235 26 Oct 2017, 22:03

That seems to work. thanks so far.

But, i have tried to include the array in another struct, and that failed. I think its because of the nested {} of rept and the struc

I've tried "repeat" and "end repeat", but that doesn't seem to process the local label correctly.

Is there something else i can try ?

26 Oct 2017, 22:03

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20451
Location: In your JS exploiting you and your system

revolution 26 Oct 2017, 22:27

To nest macros you use the backslash.

Code:

struc {
 ;...
  rept \{
    ;...
  \}
}

26 Oct 2017, 22:27

_shura

Joined: 22 May 2015
Posts: 61

_shura 27 Oct 2017, 08:09

Code:

struc cell n: 1
  repeat n, count: 0
    .item#count.value db 16
    .item#count.value2 db 25
  end repeat
end struc

in fasmg, something similar should work in fasm1

27 Oct 2017, 08:09

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