Assembly code snippets

Details

Title	hex ASCIIZ string to dword
Author	The Svin
Submitted by:	The Svin
Date added:	2002-03-23 11:28:55
Date modified:	2002-03-23 11:30:04

Comments

Only capital (ABCDEF) letters allowed.
Module in format of m32lib.
in masm32.inc add:
htodwc proto :DWORD

Snippet

; #########################################################################

    ; --------------------------------------
    ; This procedure was written by Svin
    ; --------------------------------------

      .386
      .model flat, stdcall  ; 32 bit memory model
      option casemap :none  ; case sensitive

    .code

; #########################################################################
OPTION PROLOGUE:NONE
OPTION EPILOGUE:NONE

htodwc         proc FORCENOFRAME

    push ebx
    xor eax,eax
    mov ebx,[esp+8]
    xor edx,edx
@@: mov dl,[ebx] ;1
    shl eax,4        ;0
    cmp dl,41h   ;1
    inc ebx         ;0
    sbb cl,cl       ;1
    sub dl,'A'-0Ah ;0
    and cl,7        ;1
    add dl,cl      ;1
    cmp byte ptr [ebx],0 ;0
    lea eax,[eax][edx] ;1
    jne @B  ;1
    pop ebx
    ret 4
htodwc         endp

OPTION PROLOGUE:DEFAULTOPTION
OPTION EPILOGUE:DEFAULTOPTION

; #########################################################################

end