flat assembler
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Index > Macroinstructions > Need an if before equ

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l4m2



Joined: 15 Jan 2015
Posts: 648
l4m2
Code:
macro matche s{
  local t
  irps x, s \{
    if x in <(, [, \{>
      t equ x
    else if ~defined t
      goto _false
    else if x eq ) & t eq (
      restore t
    else if x eq ] & t eq [
      restore t
    else if x eq \} & t eq \{
      restore t
    else
      goto _false
    end if
  \}
  if defined t
_false:
    var equ 0
  else
    var equ 1
  end if
}    

The meaning was shown but the code is with a lot of mistake Very Happy
Post 15 Apr 2016, 15:02
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17287
Location: In your JS exploiting you and your system
revolution
IF and EQU are not compatible when used like that. IF is processed by the assembler, EQU by the preprocessor. In your code 'var' is always EQUated to '1'.

Instead, try using '='.
Code:
var = 0    
Post 15 Apr 2016, 15:07
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l4m2



Joined: 15 Jan 2015
Posts: 648
l4m2
revolution wrote:
IF and EQU are not compatible when used like that. IF is processed by the assembler, EQU by the preprocessor. In your code 'var' is always EQUated to '1'.

Instead, try using '='.
Code:
var = 0    
I knew that. I just want to know how to do the right thing
Post 15 Apr 2016, 15:09
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l4m2



Joined: 15 Jan 2015
Posts: 648
l4m2
Mainly I wonder how to do with this
Code:
    if x in <(, [, \{> 
      t equ x 
    else if ~defined t 
      goto _false 
    
Post 15 Apr 2016, 15:12
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17287
Location: In your JS exploiting you and your system
revolution
Use MATCH instead of IF.
Post 15 Apr 2016, 15:16
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l4m2



Joined: 15 Jan 2015
Posts: 648
l4m2
Code:
macro matche s{ 
  local t 
  irps x, s \{ 
    if x in <(, [, \{> 
      t equ x 
    else if x eqtype 0
      t equ num 
    else if ~defined t 
      goto _false 
    else if x eq ) & t eq ( 
      restore t 
    else if x eq ] & t eq [ 
      restore t 
    else if x eq \} & t eq \{ 
      restore t 
    else if x eqtype eax & t eq num 
      restore t 
    else 
      goto _false 
    end if 
  \} 
  if defined t 
_false: 
    var equ 0 
  else 
    var equ 1 
  end if 
}    

with eqtype still use MATCH how?
Post 15 Apr 2016, 15:21
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17287
Location: In your JS exploiting you and your system
revolution
You can't use IF any other assembler operator like EQ or EQTYPE with RESTORE/MATCH/EQU like that. You'll need to use only preprocessor operators, or only assembler operators. You have to understand that the two stages are completely separate.
Post 15 Apr 2016, 15:26
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17287
Location: In your JS exploiting you and your system
revolution
If you want an example to show one way to use MATCH look at the macro 'allow_nesting' in WIN32AX.inc.
Post 15 Apr 2016, 15:29
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l4m2



Joined: 15 Jan 2015
Posts: 648
l4m2
I didn't ask why not correct but how to make it correct, right?
Post 15 Apr 2016, 15:53
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17287
Location: In your JS exploiting you and your system
revolution
l4m2 wrote:
I didn't ask why not correct but how to make it correct, right?
I think the example I mentioned above will give you a good starting point.

But I also think that writing a full parser in fasm preprocessor syntax will be very challenging. Perhaps Tomasz's suggestion about using fasmg (in your other thread) is worth considering.
Post 15 Apr 2016, 16:14
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l4m2



Joined: 15 Jan 2015
Posts: 648
l4m2
Code:
macro matche s{
  local t 
  irps x, s \{ 
    if x in <(, [, \{> 
      t = x
    else if ~defined t 
      goto _false 
    else if x eq ) & t eq ( 
      =restore t
    else if x eq ] & t eq [ 
      =restore t
    else if x eq \} & t eq \{ 
      =restore t
    else 
      goto _false 
    end if 
  \} 
  if defined t 
_false: 
    var = 0 
  else 
    var = 1 
  end if 
}    

If using Control directives how to make the stack ?
Post 15 Apr 2016, 23:48
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17287
Location: In your JS exploiting you and your system
revolution
EQU pushes on the stack, RESTORE pops off the stack. IRPV enumerates the stack.
Post 16 Apr 2016, 11:42
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