Multiline /* ... */ comments in FASM.

Index > Compiler Internals > Multiline /* ... */ comments in FASM.

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MHajduk

Joined: 30 Mar 2006
Posts: 6113
Location: Poland

MHajduk 27 May 2007, 17:54

I've just added two little blocks of instructions to the 'PREPROCE.INC' file to allow multiline C-style comments (i.e. /* .... */):

Added fragments:

Code:

      symbol_character:
        cmp     al,3Bh
        je      ignore_comment

        ;
        ; Looking for '/*' symbols (begin of multiline comment block).  ; \
        ;                                                               ;  \
                                                                        ;  |
        ; Looking for '/'.                                              ;  |
        ;                                                               ;  |
        cmp     al, 2Fh                                                 ;  |
        jne     @f                                                      ;  |
        lods    byte [esi]                                              ;  |
                                                                        ;  |
        ; Looking for '*'.                                              ;  |
        ;                                                               ;  |
        cmp     al, 2Ah                                                 ;   \ Lines added by
        je      multiline_comment                                       ;   / Mikolaj Hajduk
                                                                        ;  |  27.05.2007.
        ; Reloading previous value of esi register if read pair differs ;  |
        ; from '/*'.                                                    ;  |
        ;                                                               ;  |
        dec     esi                                                     ;  |
        dec     esi                                                     ;  |
        lods    byte [esi]                                              ;  |
                                                                        ;  /
      @@:                                                               ; /

        cmp     al,5Ch

and

Code:

      ;                                                                 ; \
      ; Cutting off multiline comment block.                            ;  \
      ;                                                                 ;  |
      multiline_comment:                                                ;  |
        lods    byte [esi]                                              ;  |
        or      al, al                                                  ;  |
        jz      line_end                                                ;  |
                                                                        ;  |
        cmp     al, 1Ah                                                 ;  |
        je      line_end                                                ;  |
                                                                        ;   \ Lines added by
        ; Looking for '*/' symbols (end of multiline comment block).    ;   / Mikolaj Hajduk
        ;                                                               ;  |  27.05.2007.
                                                                        ;  |
        ; Looking for '*'.                                              ;  |
        ;                                                               ;  |
        cmp     al, 2Ah                                                 ;  |
        jne     multiline_comment                                       ;  |
                                                                        ;  |
        ; Looking for '/'.                                              ;  |
        ;                                                               ;  |
        lods    byte [esi]                                              ;  |
        cmp     al, 2Fh                                                 ;  |
        jne     multiline_comment                                       ;  /
        jmp     convert_line_data                                       ; /

      ignore_comment:

Attached source of changed 'PREPROCE.INC'. Copy it to the '/SOURCE' directory and recompile ALL sources of fasm (remember about DOS, Linux etc. versions).

[EDIT]Added version of 'PREPROCE.INC' with my & Mr_Silent's improvements.[/EDIT]

Description:	Version with my & Mr_Silent's improvements.	Download
Filename:	PREPROCE.INC
Filesize:	51.69 KB
Downloaded:	1167 Time(s)

Description:	First version (only my improvements).	Download
Filename:	PREPROCE.INC
Filesize:	49.48 KB
Downloaded:	1060 Time(s)

Last edited by MHajduk on 28 May 2007, 13:13; edited 3 times in total

27 May 2007, 17:54

Ehtyar

Joined: 26 Sep 2006
Posts: 51

Ehtyar 27 May 2007, 21:22

Oh that is just sexy, what else can i say. Thank you Mikolaj. For those not bothered to recompile fasm, the topic of multiline comments in fasm has been solved using macros here.

Ehtyar.

27 May 2007, 21:22

Mr_Silent

Joined: 25 Apr 2006
Posts: 30

Mr_Silent 27 May 2007, 23:10

2 MHajduk: Good start, but needs polishing. First, it breaks line numbering:

Code:

/*

*/
dd some_udefined_value

it shows error on line 2 but actually it is line 4. The more comments - the greater disarray.
Second, there are (AFAIK) two places in convert_line routine where comments are checked, and you hooked only one. As result:

Code:

dd \    ; fine
0

dd \ /* error */
0

Anyways, good work.

27 May 2007, 23:10

vid
Verbosity in development

Joined: 05 Sep 2003
Posts: 7103
Location: Slovakia

vid 27 May 2007, 23:27

nice job, it going to be highlighted.

Someone could also provide diff file for future compatibility

27 May 2007, 23:27

Mr_Silent

Joined: 25 Apr 2006
Posts: 30

Mr_Silent 28 May 2007, 10:43

Tried to fix those issues I mentioned above.
I wonder how many bugs are still left Smile

Description:		Download
Filename:	PREPROCE.INC
Filesize:	51.69 KB
Downloaded:	1102 Time(s)

28 May 2007, 10:43

MHajduk

Joined: 30 Mar 2006
Posts: 6113
Location: Poland

MHajduk 28 May 2007, 10:47

Thanks to all of you for good words. Smile

28 May 2007, 10:47

MHajduk

Joined: 30 Mar 2006
Posts: 6113
Location: Poland

MHajduk 28 May 2007, 11:27

Mr_Silent
I've just tested 'PREPROCE.INC' with your changes - also good work. Smile

[EDIT]I've added to the first post in this thread 'PREPROCE.INC' with your improvements.[/EDIT]

28 May 2007, 11:27

DOS386

Joined: 08 Dec 2006
Posts: 1904

DOS386 06 Aug 2007, 06:31

Making this official would be my wish for 1.67.23 Wink

06 Aug 2007, 06:31

MHajduk

Joined: 30 Mar 2006
Posts: 6113
Location: Poland

MHajduk 06 Aug 2007, 06:40

NTOSKRNL_VXE wrote:

Making this official would be my wish for 1.67.23

My too.

06 Aug 2007, 06:40

Tomasz Grysztar

Joined: 16 Jun 2003
Posts: 8466
Location: Kraków, Poland

Tomasz Grysztar 06 Aug 2007, 08:44

There are some other reasons why it has not been done.

06 Aug 2007, 08:44

DOS386

Joined: 08 Dec 2006
Posts: 1904

DOS386 06 Aug 2007, 10:46

Some more hints about them available ?

06 Aug 2007, 10:46

rugxulo

Joined: 09 Aug 2005
Posts: 2341
Location: Usono (aka, USA)

rugxulo 31 Aug 2007, 05:22

Tomasz Grysztar wrote:

There are some other reasons why it has not been done.

/*
Like what? Just ignore /* or */ inside any string literals and behind normal ; comment lines. (Sorry, I know it's not quite that simple, just saying ...)
*/

Smile

31 Aug 2007, 05:22

comrade

Joined: 16 Jun 2003
Posts: 1150
Location: Russian Federation

comrade 06 Apr 2009, 16:36

What's the status on official support of this? Just wondering

06 Apr 2009, 16:36

rxantos

Joined: 19 Jul 2008
Posts: 41

rxantos 22 Jun 2009, 15:31

This is useful as it would allow to use doxygen to comment assembly sourcecode. Of course, you will still need to use @fn, @struct, @typedef in the comment, but at least you can have the comment at the same place as the code. Instead of a different tile.

I hope it makes it to be official.

22 Jun 2009, 15:31

MHajduk

Joined: 30 Mar 2006
Posts: 6113
Location: Poland

MHajduk 23 Jun 2009, 09:53

rxantos wrote:

I hope it makes it to be official.

Now everything depends on Tomasz Grysztar's decision. Wink

23 Jun 2009, 09:53

Azu

Joined: 16 Dec 2008
Posts: 1159

Azu 19 Aug 2009, 09:35

Tomasz Grysztar wrote:

There are some other reasons why it has not been done.

Just out of curiosity (not to be rude or disrespect your authority), what are they?

19 Aug 2009, 09:35

MHajduk

Joined: 30 Mar 2006
Posts: 6113
Location: Poland

MHajduk 19 Aug 2009, 10:30

Azu wrote:

Tomasz Grysztar wrote:
There are some other reasons why it has not been done.
Just out of curiosity (not to be rude or disrespect your authority), what are they?

Azu, it seems to be the one of best protected secrets of our world. Laughing

19 Aug 2009, 10:30

Plue

Joined: 15 Dec 2005
Posts: 151

Plue 19 Aug 2009, 19:33

What is wrong with if 0 .. end if?

19 Aug 2009, 19:33

Azu

Joined: 16 Dec 2008
Posts: 1159

Azu 19 Aug 2009, 21:03

Try to compile this and find out.

Code:

blah equ db 0

if 0
    blah equ db error
   macro foo bar{
         if bar eq 1
                 db 3
                else
                        dd 12345678
         end if
      }
      foo 1
end if

blah

19 Aug 2009, 21:03

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