How to concatenate two lines with preprocessor?

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Z3N

Joined: 01 Oct 2009
Posts: 17

Z3N 25 Mar 2010, 11:43

Whether it is possible?

Example:

Code:

first equ 'head'
second equ 'body'

concatenate first,second

OUT:

first equ 'headbody'

"@concatenate"is invented macro.

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25 Mar 2010, 11:43

vid
Verbosity in development

Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia

vid 25 Mar 2010, 12:24

AFAIK, FASM can't concatenate two string into single one (string handling is generally one of weak spots of FASM).

25 Mar 2010, 12:24

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20630
Location: In your JS exploiting you and your system

revolution 25 Mar 2010, 13:10

Code:

first equ 'head'
second equ 'body'

match xx yy,first second {first equ xx#yy}

display first

use64
mov rax,first

25 Mar 2010, 13:10

vid
Verbosity in development

Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia

vid 25 Mar 2010, 13:16

oh... nevermind me reply then Smile

25 Mar 2010, 13:16

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20630
Location: In your JS exploiting you and your system

revolution 25 Mar 2010, 13:21

If you need it as a macro:

Code:

macro concatenate x,y{match xx yy,x y\{x equ xx\#yy\}}

first equ 'head'
second equ 'body'

concatenate first,second

display first

use64
mov rax,first

25 Mar 2010, 13:21

Madis731

Joined: 25 Sep 2003
Posts: 2139
Location: Estonia

Madis731 25 Mar 2010, 13:35

But crossing a line isn't possible. For example:
<head>
<body>
...

here concat wouldn't work. The same problem is with multi-line comments.

25 Mar 2010, 13:35

Z3N

Joined: 01 Oct 2009
Posts: 17

Z3N 28 Mar 2010, 11:46

revolution wrote:

Code:

first equ 'head'
second equ 'body'

match xx yy,first second {first equ xx#yy}

display first

use64
mov rax,first

Great! It's work!!!
Big thx!!!

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"There will be no more delay!" (Revelation 10)

28 Mar 2010, 11:46

Tyler

Joined: 19 Nov 2009
Posts: 1216
Location: NC, USA

Tyler 28 Mar 2010, 12:14

@vid: see http://flatassembler.net/docs.php?article=manual#2.3.3

Scroll until you get to

Code:

macro jif op1,cond,op2,label
     {
        cmp op1,op2
        j#cond label
     }

The paragraph below that explains the method revolution used(and a few others). I didn't know about it either Smile

28 Mar 2010, 12:14

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