invokeif macro...

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cod3b453

Joined: 25 Aug 2004
Posts: 618

cod3b453 29 Jun 2005, 16:35

Hi

I'm trying to get my invokeif macro to work:

Code:

jnne equ je
jnna equ ja
jnnb equ jb
jnnz equ jz
jnbe equ ja
jnae equ jb 

macro invokeif v1,cond,v2,proc,[args]
 {
 common
        cmp v1,v2
        jn#cond @f

        if ~ args eq
                stdcall proc,args
        else
                call [proc]
        end if

    @@:
 }  

;Example Usage:
invokeif [hWnd],ne,0,ShowWindow,[hWnd],SW_SHOW

Can anyone see what I'm doing wrong?

Thanks in advance,

cod3b453

29 Jun 2005, 16:35

vid
Verbosity in development

Joined: 05 Sep 2003
Posts: 7103
Location: Slovakia

vid 29 Jun 2005, 20:58

I can't see any error there, are you sure it doesn't work?

But:
1. use macro-local labels instead of @@. Also sart all their names with "..".
2. I believe you don't need to define jnbe and jnae.
3. Seems you forgot about signed local jumps - jl, jng...

PS: why not "c0d3b453", if you want to look hacky?

29 Jun 2005, 20:58

cod3b453

Joined: 25 Aug 2004
Posts: 618

cod3b453 30 Jun 2005, 17:18

1. When you say "local label instead of @@", do you mean:

Code:

macro invokeif v1,cond,v2,proc,[args] 
 { 
 local _jmp ; <<<
 common 
        cmp v1,v2 
        jn#cond _jmp ; <<<

        if ~ args eq 
                stdcall proc,args 
        else 
                call [proc] 
        end if 

    _jmp: ; <<<
 }

2. Your probably right but it's there just in case

3. I never use jl jng etc (what do they do that the others don't anyway? lol)

PS: Because the "0" on most fonts looks rubbish so i stick with "o" - if I really thought the number of non alpha numeric characters on my tag were related to my computer ability I would have had : ©ØÐ3ß@$€

30 Jun 2005, 17:18

cod3b453

Joined: 25 Aug 2004
Posts: 618

cod3b453 30 Jun 2005, 17:44

OK i just realised something - it's not the jump, but the call: when I use invoke it disassembles to:

call dword ptr [????????]

whereas invokeif disassembles to:

call ????????

so I have now got:

Code:

macro invokeif v1,cond,v2,proc,[args]
 {
 common
        cmp v1,v2
        jn#cond @f

        if ~ args eq

 reverse
     pushd args

 common
        call dword ptr proc

        else
                call dword ptr proc
        end if

    @@:
 }

which seems to work

30 Jun 2005, 17:44

vid
Verbosity in development

Joined: 05 Sep 2003
Posts: 7103
Location: Slovakia

vid 30 Jun 2005, 20:13

of course, but it should be

Code:

macro invokeif v1,cond,v2,proc,[args]  
 {  
 local ..jmp ; <<<  note two dots
 common  
        cmp v1,v2  
        jn#cond ..jmp ; <<< 

        if ~ args eq  
                stdcall [proc],args  ;<- this was the problem
        else  
                call [proc]  
        end if  

    ..jmp: ; <<< 
 }

otherwise code like

Code:

MyProcedure:
  ...
  invokeif ...
  .a:

will define "_jmp.a" instead of "MyProcedure.a". But label with two dots doesn't change namespace.

PS: "call ptr a" is same as "call [a]", and "call dword ptr a" is same as "call dword [a]"

30 Jun 2005, 20:13

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