Need an if before equ

Index > Macroinstructions > Need an if before equ

Author

Thread

l4m2

Joined: 15 Jan 2015
Posts: 666

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

15 Apr 2016, 15:02

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 18472
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

15 Apr 2016, 15:07

l4m2

Joined: 15 Jan 2015
Posts: 666

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

15 Apr 2016, 15:09

l4m2

Joined: 15 Jan 2015
Posts: 666

l4m2

Mainly I wonder how to do with this

Code:

    if x in <(, [, \{> 
      t equ x 
    else if ~defined t 
      goto _false

15 Apr 2016, 15:12

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 18472
Location: In your JS exploiting you and your system

revolution

Use MATCH instead of IF.

15 Apr 2016, 15:16

l4m2

Joined: 15 Jan 2015
Posts: 666

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?

15 Apr 2016, 15:21

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 18472
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.

15 Apr 2016, 15:26

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 18472
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.

15 Apr 2016, 15:29

l4m2

Joined: 15 Jan 2015
Posts: 666

l4m2

I didn't ask why not correct but how to make it correct, right?

15 Apr 2016, 15:53

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 18472
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.

15 Apr 2016, 16:14

l4m2

Joined: 15 Jan 2015
Posts: 666

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 ?

15 Apr 2016, 23:48

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 18472
Location: In your JS exploiting you and your system

revolution

EQU pushes on the stack, RESTORE pops off the stack. IRPV enumerates the stack.

16 Apr 2016, 11:42

< Last Thread | Next Thread >

Forum Rules:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum