Help initializing array of struct

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alorent

Joined: 05 Dec 2005
Posts: 221

alorent 21 May 2010, 11:51

Hellp guys,

I have the following struct (taken from another post):

Code:

struc StructureName x,y,life,color,direc 
{ 
.x dw x 
.y dw y 
.life dw life 
.color dw color 
.direc dw direc 
}

And I would like to initialize several (about 50) sequences of that structure. Example:

Code:

ArrayStructure  StructureName 0,0,0,1,-4
                     StructureName 0,0,0,2,-4   ; <-- ERROR!!!
                     StructureName 0,0,0,3,-4
                     StructureName 0,0,0,4,-4
                     StructureName 0,0,0,5,-4
                     StructureName 0,0,0,6,-4
                     StructureName 0,0,0,7,-4
                     StructureName 0,0,0,8,-4
                     StructureName 0,0,0,9,-4
                     StructureName 0,0,0,1,-4
                     StructureName 0,0,0,2,-4
                     StructureName 0,0,0,3,-4
                     StructureName 0,0,0,4,-4
                     StructureName 0,0,0,5,-4

I get FASM error as it seems that I have to name each line with a variable name. Is it possible to define the above withouth giving multiple variable names for each "StructureName" initialization?

Thanks!

21 May 2010, 11:51

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20299
Location: In your JS exploiting you and your system

revolution 21 May 2010, 12:01

Add this somewhere before "ArrayStructure":

Code:

macro StructureName x,y,life,color,direc
{
 dw x
 dw y
 dw life
 dw color
 dw direc
}

21 May 2010, 12:01

alorent

Joined: 05 Dec 2005
Posts: 221

alorent 21 May 2010, 12:19

Thanks revolution! It works as you mention.

But, is there any "cleaner" way to do it? I mean, with your solution, if I modify the structure I have to make sure that I also update the macro to avoid inconsistences, which produces a much difficult code to maintain.

Thanks!

21 May 2010, 12:19

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20299
Location: In your JS exploiting you and your system

revolution 21 May 2010, 12:22

Try this:

Code:

macro StructureName [args]
{
common
local ..x
..x StructureName args
}

21 May 2010, 12:22

bitshifter

Joined: 04 Dec 2007
Posts: 796
Location: Massachusetts, USA

bitshifter 21 May 2010, 13:04

I think by including win32 struct macro we can get all the
functionality we need, correct me if i am wrong...

Code:

include 'macro\struct.inc'

struct StructureName
  x     dw ?
  y     dw ?
  life  dw ?
  color dw ?
  direc dw ?
ends

ArrayStructure:
  StructureName 0,0,0,1,-4
  StructureName 0,0,0,2,-4
  StructureName 0,0,0,3,-4
  StructureName 0,0,0,4,-4
  StructureName 0,0,0,5,-4
  StructureName 0,0,0,6,-4
  StructureName 0,0,0,7,-4
  StructureName 0,0,0,8,-4
  StructureName 0,0,0,9,-4
  StructureName 0,0,0,1,-4
  ...

; TESTING IT...

mov ebx,ArrayStructure
mov ax,[StructureName.x+ebx] ; first instance.x

add ebx,sizeof.StructureName
mov dx,[StructureName.y+ebx] ; second instance.y

21 May 2010, 13:04

baldr

Joined: 19 Mar 2008
Posts: 1651

baldr 21 May 2010, 15:50

bitshifter,

You're right. Even more, struct macro defines its argument as both macro and struc so you can use ArrayStructure StructureName too.

21 May 2010, 15:50

bitshifter

Joined: 04 Dec 2007
Posts: 796
Location: Massachusetts, USA

bitshifter 21 May 2010, 19:41

And you dont even need to initialize the values Razz

Code:

ArrayStructure:
  repeat 256
    StructureName
  end repeat

21 May 2010, 19:41

alorent

Joined: 05 Dec 2005
Posts: 221

alorent 24 May 2010, 10:19

Thanks a lot bitshifter! Exactly what I was looking for Very Happy

24 May 2010, 10:19

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