DEFINE_GUID macro

[MichaelW]

I suspect that this has already done by someone somewhere, but in my quick search I didn’t find anything similar, so…

This macro allows you to paste a C statement, that uses the DEFINE_GUID macro (see Guiddef.h) to define a GUID, directly in your code or data section without modification. There is no need to translate the hex notation, replace the parentheses with angle brackets/curly braces or place angle brackets/curly braces around the last 8 fields, or even remove the statement separator at the end.

This macro ensures that the statement uses C hex notation for every field, but does not test for any other problems. And note that it has NOT been thoroughly tested.

Code: [Select]

;========================================================================================================
    include \masm32\include\masm32rt.inc
;========================================================================================================

DEFINE_GUID MACRO _name,l,w1,w2,b1,b2,b3,b4,b5,b6,b7,b8
    guiddef equ <_name GUID {>
    val equ <>
    n = 0
    FOR arg,<l,w1,w2,b1,b2,b3,b4,b5,b6,b7,b8>
      pre SUBSTR <arg>,1,2
      IFDIFI pre,<0x>
        ECHO -----------------------------------------
        ECHO ERROR 0x PREFIX ON INITIALIZERS REQUIRED
        ECHO -----------------------------------------
        .ERR
      ENDIF
      val SUBSTR <arg>,3
      IF n LT 10
        val CATSTR <0>,val,<h>,<,>
      ELSE
        val CATSTR <0>,val,<h>
      ENDIF
      guiddef CATSTR guiddef,val
      IF n EQ 2
        guiddef CATSTR guiddef,<{>
      ENDIF
      n = n + 1
    ENDM
    guiddef CATSTR guiddef,<}}>
    curseg TEXTEQU @CurSeg
    ;% echo curseg
    .data
      align 16
      guiddef
    @CurSeg ENDS
    curseg SEGMENT
    EXITM <>
ENDM

;========================================================================================================
    .data?
      buffer db 100 dup(?)
    .data

      IID_IDebugControl0 GUID <5182E668h,105Eh,416Eh,<0ADh,92h,24h,0EFh,80h,4,24h,0BAh>>

      DEFINE_GUID(IID_IDebugControl1,0x5182e668,0x105e,0x416e,0xad,0x92,0x24,0xef,0x80,0x04,0x24,0xba);

      IID_IDebugControl3 GUID <5182E668h,105Eh,416Eh,<0ADh,92h,24h,0EFh,80h,4,24h,0BAh>>

    .code
;========================================================================================================
start:
;========================================================================================================

    ;-----------------------------------------------------------------------
    ; With the original coding the macro switched back to the code section,
    ; instead of preserving and then restoring the current section, and the
    ; following statements displayed:
    ; 403000h
    ; 401000h
    ; So obviously IID_IDebugControl3 was not where I intended it to be :)
    ;-----------------------------------------------------------------------

    printf("%Xh\n", ADDR IID_IDebugControl0)
    printf("%Xh\n\n", ADDR IID_IDebugControl3)

    DEFINE_GUID(IID_IDebugControl2,0x5182e668,0x105e,0x416e,0xad,0x92,0x24,0xef,0x80,0x04,0x24,0xba);

    invoke StringFromGUID2, ADDR IID_IDebugControl0, ADDR buffer, 50
    printf("%d\t%S\n", eax, ADDR buffer)
    invoke StringFromGUID2, ADDR IID_IDebugControl1, ADDR buffer, 50
    printf("%d\t%S\n", eax, ADDR buffer)
    invoke StringFromGUID2, ADDR IID_IDebugControl2, ADDR buffer, 50
    printf("%d\t%S\n", eax, ADDR buffer)
    invoke StringFromGUID2, ADDR IID_IDebugControl3, ADDR buffer, 50
    printf("%d\t%S\n\n", eax, ADDR buffer)

    inkey
    exit
;========================================================================================================
end start

The curly braces on the returned string are added by StringFromGUID2.

Code: [Select]

403000h
403020h

39      {5182E668-105E-416E-AD92-24EF800424BA}
39      {5182E668-105E-416E-AD92-24EF800424BA}
39      {5182E668-105E-416E-AD92-24EF800424BA}
39      {5182E668-105E-416E-AD92-24EF800424BA}


[dedndave]

hi Michael
the best one i found in the old forum....
http://www.masmforum.com/board/index.php?topic=2077.msg16530#msg16530

Jeff tries to emulate the C definition of DEFINE_GUID, including INITGUID
that seems like a clumsy step in "asm world"

to my way of thinking, why not...

Code: [Select]

DEFINE_GUID MACRO name,l,w1,w2,b1,b2,b3,b4,b5,b6,b7,b8
    name GUID <l,w1,w2,<b1,b2,b3,b4,b5,b6,b7,b8>>
ENDM :P

of course, you could add FourF's little section preservation trick...
http://masm32.com/board/index.php?topic=1546.msg15842#msg15842
it should be simple to test for no current open segment and upgrade the section preservation technique

[MichaelW]

Dave,

Thanks. Jeff went further with the declarations, but I don’t know enough about it to judge the value of that. He did not do any translations. The DbgEng.h from my Server 2003 SP1 PSDK defines 22 GUIDs, all in a format that my macro can handle, for example:

Code: [Select]

/* f2df5f53-071f-47bd-9de6-5734c3fed689 */
DEFINE_GUID(IID_IDebugAdvanced, 0xf2df5f53, 0x071f, 0x47bd,
            0x9d, 0xe6, 0x57, 0x34, 0xc3, 0xfe, 0xd6, 0x89);
/* 5bd9d474-5975-423a-b88b-65a8e7110e65 */
DEFINE_GUID(IID_IDebugBreakpoint, 0x5bd9d474, 0x5975, 0x423a,
            0xb8, 0x8b, 0x65, 0xa8, 0xe7, 0x11, 0x0e, 0x65);
/* 27fe5639-8407-4f47-8364-ee118fb08ac8 */
DEFINE_GUID(IID_IDebugClient, 0x27fe5639, 0x8407, 0x4f47,
            0x83, 0x64, 0xee, 0x11, 0x8f, 0xb0, 0x8a, 0xc8);

And my quick survey of the 95 header files that my search for DEFINE_GUID found showed anywhere from 1 to more than 100 per file, all apparently in the same format, and I suspect that with the later versions of Windows the number has increased, and possibly “exploded”.

Regarding the segment preservation, I can’t see the value of it for anything resembling normal code.

Edit:

Scratch that, the value of it should have been obvious. I changed the code above to preserve and restore the current section.

Strange, even with /W3 MASM sill assumed that I knew what I was doing 

[dedndave]

Regarding the section preservation, I can’t see the value of it for anything resembling normal code.

well - not for "us"   
for "them"

by "them", i mean those who came from the world of C to ASM - lol
my preference is to just use the GUID struct in the .DATA section

Code: [Select]

GUID_DEVCLASS_1394 GUID <6BDD1FC1h,810Fh,11D0h,<0BEh,0C7h,8,0,2Bh,0E2h,9,2Fh>>what's so hard about that ?

[jj2007]

> what's so hard about that?
Not so hard, actually, although copy & paste can be convenient:

include \masm32\MasmBasic\MasmBasic.inc        ; download
.data
CLSID_WebBrowser        GuidFromString(8856F961-340A-11D0-A96B-00C04FD705A2)      ; ExDisp.h syntax
IID_IWebBrowser           GuidFromString("EAB22AC1-30C1-11CF-A7EB-0000C05BAE0B")   ; quoted
IID_IWebBrowser2         GuidFromString({D30C1661-CDAF-11D0-8A3E-00C04FC9E26E})   ; registry syntax

        Init
        .if GuidsEqual(offset IID_IWebBrowser, offset IID_IWebBrowser2)
                Inkey "The GUIDs are equal"
        .else
                Inkey "The GUIDs are NOT equal"
        .endif
        Exit
end start

(from OLE support in MasmBasic, Sept 2012)

[MichaelW]

If you need a sizable number of GUIDs, and for some purposes you do, and your source for the GUIDs is C code or a C header file, doing it via copy paste and an automated translation could save a significant amount of time and prevent errors.