'Struct' definition.

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khanh

Joined: 25 Jul 2003
Posts: 27

khanh 03 Jun 2004, 14:31

I've seen this in the Fasm package:

Code:

macro struct name
 { virtual at 0
   name name
   sizeof.#name = $ - name
   name equ sizeof.#name
   end virtual }

If I understand correctly, after this 'name' is equal to sizeof structure?Why?
For example if this structure is decleared:

Code:

struc SYSTEMINFO
 {
   .wProcessorArchitecture      dw ?
   .wReserved                   dw ?
   .dwPageSize                  dd ?
   .lpMinimumApplicationAddress dd ?
   .lpMaximumApplicationAddress dd ?
   .dwActiveProcessorMask       dd ?
   .dwNumberOfProcessors        dd ?
   .dwProcessorType             dd ?
   .dwAllocationGranularity     dd ?
   .wProcessorLevel             dw ?
   .wProcessorRevision          dw ?
 }
struct SYSTEMINFO

so Systeminfo = sizeof Systeminfo ?

I'm newbie!

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03 Jun 2004, 14:31

pelaillo
Missing in inaction

Joined: 19 Jun 2003
Posts: 878
Location: Colombia

pelaillo 03 Jun 2004, 19:19

Yes, this is the intention.

However, it is better to always use sizeof.NAME form. It is safer because in some situations you cannot use only the name.
And because source is more readable.

BTW, I prefer to use NAME.size because is nicer and I find it more homogeneous nomenclature.

03 Jun 2004, 19:19

khanh

Joined: 25 Jul 2003
Posts: 27

khanh 03 Jun 2004, 20:26

Thank for your quicl reply Wink

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03 Jun 2004, 20:26

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