Using macros like variables?

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Azu

Joined: 16 Dec 2008
Posts: 1159

Azu 24 Dec 2009, 06:47

How can I do something like this?

if (macroA blah,blahblah,pizza = 1) & (macroB foo,bar = 2)

Do I have a make a macro to replace "if" that somehow parses stuff like this, or is there already a facility in FASM that can do this? And if so, what do I put the return value in?

_________________

24 Dec 2009, 06:47

LocoDelAssembly
Your code has a bug

Joined: 06 May 2005
Posts: 4624
Location: Argentina

LocoDelAssembly 24 Dec 2009, 06:57

You have to do it yourself and also you'll need to make your macros cooperate with this (like using a "RESULT" variable since macros don't have return value.

Make sure it really worths the effort, specially considering you could just write this instead:

Code:

macroA blah,blahblah,pizza
if RESULT = 1
  macroB foo, bar
  if RESULT = 2
   ...

; Or this if you need long-circuit

macroA blah,blahblah,pizza
A = RESULT
macroB foo, bar

if (A = 1) & (RESULT = 2)
...

PS: Just a note, the preprocessing elements of the macros will be always long-circuited in the example above, if the "if" should affect the preprocessing stage then match has to be used instead.

24 Dec 2009, 06:57

Azu

Joined: 16 Dec 2008
Posts: 1159

Azu 24 Dec 2009, 07:06

It would be so much easier to read and write it if I could do it in one line though.

Here's what I have so far (requires multiple lines!) and it doesn't even work Sad

Code:

macro varif [varMacro,<varArgs>,varCompareType,varCompareValue]{
       varIsTrue=1
forward
      varMacro        varArgs
     if result varCompareType varCompareValue
    else
                varIsTrue=0
 end if
common
}

varIf macroA,<blah,blahblah,pizza>,=,1,macroB,<foo,bar>,=,2
if varIsTrue

See it is two lines, it is really ugly, and it won't even compile.

Sad

This also doesn't work

Code:

macro   varif [varMacro,<varArgs>,varCompare]{
   varIsTrue=1
forward
      varMacro        varArgs
     if result varCompare
        else
                varIsTrue=0
 end if
common
}

varIf macroA,<blah,blahblah,pizza>,= 1,macroB,<foo,bar>,= 2
if varIsTrue

Please tell me what I'm doing wrong.. Confused

p.s. and yes I do set result in the macros

_________________

24 Dec 2009, 07:06

Borsuc

Joined: 29 Dec 2005
Posts: 2465
Location: Bucharest, Romania

Borsuc 25 Dec 2009, 01:24

I've no idea how you could do that but you might be interested in using 'match' in the varIF macro to get rid of all the commas...

have one parameter and use match to get the individual parameters, but you can define the separation with any symbol. you can use irp or irps to loop through them (though I don't think you'll need to).

25 Dec 2009, 01:24

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