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Index > Windows > Few questions of syntax questions

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StakFallT



Joined: 19 Jan 2006
Posts: 48
StakFallT
1a) How does one fill in values during declartion (more specifically the sizeof parameter) with this
LCDBITMAPINFO BITMAPINFOHEADER

I tried LCDBITMAPINFO BITMAPINFOHEADER <$ - BITMAPINFOHEADER, ...>
but it didn't like that...
1b) Is there a sizeof function besides $ - <object type> and can it be used during the declaration of objects in the different data sections of one's code where generally most of the variables are declared and/or initialized?

2a) What's the fasm equivalent to the MASM statement
imul edx,RandSeed,08088405H ?
2b) Where does imul store the value in the above line, edx or eax?

-- StakFallT
Post 26 Jan 2006, 13:42
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Madis731



Joined: 25 Sep 2003
Posts: 2141
Location: Estonia
Madis731
1a)
Code:
some_structure:
...
end_of_structure
some_structure.size=$-some_structure
;OR
sizeof.some_structure=$-some_structure
    

1b)
NO - only macros that do the same as 1a

2a)
Code:
imul edx,[RandSeed],08088405H
    


2b)
EDX
Post 26 Jan 2006, 14:18
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Tomasz Grysztar
Assembly Artist


Joined: 16 Jun 2003
Posts: 7721
Location: Kraków, Poland
Tomasz Grysztar
As for the 1a, it think it was rather this that he wanted:
Code:
LCDBITMAPINFO BITMAPINFOHEADER sizeof.BITMAPINFOHEADER    

which sets up [LCDBITMAPINFO.biSize] with value sizeof.BITMAPINFOHEADER.
Post 26 Jan 2006, 17:14
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RedGhost



Joined: 18 May 2005
Posts: 443
Location: BC, Canada
RedGhost
Tomasz Grysztar wrote:
As for the 1a, it think it was rather this that he wanted:
Code:
LCDBITMAPINFO BITMAPINFOHEADER sizeof.BITMAPINFOHEADER    

which sets up [LCDBITMAPINFO.biSize] with value sizeof.BITMAPINFOHEADER.


didn't know fasm could dynamically initiate struct members like that on declaration (is there anything this damn assembler cant do yet Surprised)

...
i tend to just write out the structures manually and do what Madis suggested, like i needed a PROCESSENTRY32 structure last night but only two of the parameters

Code:
_PROCESSENTRY32:
    dd _PROCESSENTRY32.size ;initialize .dwSize (required)
    dd ?
    .th32ProcessID dd ?
    rd 6
    .szExeFile rb 260 ;MAX_PATH
    _PROCESSENTRY32.size = $-_PROCESSENTRY32
    


and i would just reference _PROCESSENTRY32.whatever, but that style isnt very dynamic

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Post 27 Jan 2006, 03:03
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