Usage of lstrcpy

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Hicel

Joined: 09 Sep 2004
Posts: 55

Hicel 17 Aug 2005, 02:21

Can someone give me an example of how to use lstrcpy. I searched the forum but didn't find a solution for my problem.
Because this doesnt work:

Code:

stringI db "    ",0
stringII db "test",0

push dword [stringII]
push dword [stringI]
call lstrcpy

stringI is still nothing? but why?

this was just written from mind now because i'm not at home at the moment
I need to do this with pushes and i don't know if it was only "call lstrcpy" i think not but i hope you know what i want to do.. i don't want to use invoke.

17 Aug 2005, 02:21

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20451
Location: In your JS exploiting you and your system

revolution 17 Aug 2005, 02:31

Code:

stringI db "    ",0 
stringII db "test",0 

push stringII  ;push the address of the string
push stringI   ;push the address of the string
call lstrcpy

17 Aug 2005, 02:31

Matriark TerVel

Joined: 09 Aug 2005
Posts: 8
Location: Cincinnati, OH, USA

Matriark TerVel 18 Aug 2005, 14:55

Hicel wrote:

Can someone give me an example of how to use lstrcpy. I searched the forum but didn't find a solution for my problem.
Because this doesnt work:
Code:
stringI db "    ",0
stringII db "test",0

push dword [stringII]
push dword [stringI]
call lstrcpy
    
stringI is still nothing? but why?

this was just written from mind now because i'm not at home at the moment
I need to do this with pushes and i don't know if it was only "call lstrcpy" i think not but i hope you know what i want to do.. i don't want to use invoke.

You could also do:

Code:

           mov esi,stringII
           mov edi,stringI
.sloop:    movsb
           ; use [esi] if you don't want to copy the trailing 0
           cmp byte [esi-1],0
           jnz .sloop

and avoid lstrcpy all together. Wink

FYI: The reason you wern't getting anything with lstrcpy is because you were dereferencing the pointers.

_________________
Tim

18 Aug 2005, 14:55

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