bytes in an array

Index > Main > bytes in an array

Author

Thread

RedGhost

Joined: 18 May 2005
Posts: 443
Location: BC, Canada

RedGhost

if szMessage was 'abc'
and i wanted to push a certain character from that string
how would i go about that?

in c it would be szMessage[0], if i wanted the 'a'

24 May 2005, 15:17

coconut

Joined: 02 Apr 2004
Posts: 326
Location: usa

coconut

not sure but try something like

cmp byte [szMessage+1] ,'a'

24 May 2005, 16:02

madmatt

Joined: 07 Oct 2003
Posts: 1045
Location: Michigan, USA

madmatt

Or you can do something like this:

Code:

    mov   ecx, 0; or any character wanted.
    mov   al, [szMessage + ecx] ;get first character, position 0.
    ;this method allows you to loop though the characters.

You did say push, so:

Code:

    mov   ecx, 2; or any character wanted
    mov   al, [szMessage + ecx] ;get third character, position 2.
    push  eax  ;ALWAYS, push a DWORD sized value on the stack.
    pop   eax ;restores char in AL. and also preserves AH
    ;this method also allows you to loop though the characters

24 May 2005, 16:30

RedGhost

Joined: 18 May 2005
Posts: 443
Location: BC, Canada

RedGhost

coconut wrote:

not sure but try something like

cmp byte [szMessage+1] ,'a'

yeah you can compare or replace them that way

madmatt wrote:

Or you can do something like this:

Code:

    mov   ecx, 0; or any character wanted.
    mov   al, [szMessage + ecx] ;get first character, position 0.
    ;this method allows you to loop though the characters.

You did say push, so:

Code:

    mov   ecx, 2; or any character wanted
    mov   al, [szMessage + ecx] ;get third character, position 2.
    push  eax  ;ALWAYS, push a DWORD sized value on the stack.
    pop   eax ;restores char in AL. and also preserves AH
    ;this method also allows you to loop though the characters

thanks alot, and yeah thats exactly what i was trying to do (loop thru em)

24 May 2005, 18:22

< Last Thread | Next Thread >

Forum Rules:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum