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iam_clint
How do I cheat?
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Joined: 14 Dec 2007
Posts: 0
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 Posted: Fri Dec 14, 2007 6:42 pm Post subject: Assembly Int to String? |
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need help to convert an int to a string in assembly
example provided
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| Code: |
push eax
mov eax,[10232F2] //This value for example could be 22
mov [10332D],eax //[10332D] is a text for example A Goat
pop eax
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when I run this code I get a hex value in the text field so say it was 22 being pushed into that text it would show 0x16 if i swap the text to a byte field in CE but when its in text view it shows a random symbol/letter
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sponge
I'm a spammer
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Joined: 07 Nov 2006
Posts: 6009
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| Posted: Fri Dec 14, 2007 7:24 pm Post subject: |
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Check m32lib's version of ITOA.
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Uzeil
Moderator
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Joined: 21 Oct 2006
Posts: 2411
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| Posted: Fri Dec 14, 2007 7:55 pm Post subject: |
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| Code: | | invoke crt__itoa, <number>, <pointer to string buffer>, <radix> |
Example:
| Code: | .DATA
somestring db 50 dUP(00)
magicalnumber dd 13371337h
.CODE
start:
mov eax,magicalnumber
invoke crt__itoa, eax, offset somestring, 10h |
or
| Code: | .DATA
somestring db 50 dUP(00)
magicalnumber dd 13371337h
.CODE
start:
push 16
push offset somestring
push magicalnumber
call crt__itoa
add esp,0ch |
They do the same thing. Make sure you import msvcrt though...
For string to int I just use StrToInt... if the string is, say "10" it'll return 10 in eax(0x0a), and if the string is, say "$10", it'll return 16 in eax(0x10). The $ sign simply means 'hexidecimal', You can use crt__atoi as well, but if the result is the same, I'm fine with being a slut for simplicity- in which StrToInt takes the cake.
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iam_clint
How do I cheat?
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Joined: 14 Dec 2007
Posts: 0
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| Posted: Fri Dec 14, 2007 8:36 pm Post subject: |
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| Uzeil wrote: | | Code: | | invoke crt__itoa, <number>, <pointer to string buffer>, <radix> |
Example:
| Code: | .DATA
somestring db 50 dUP(00)
magicalnumber dd 13371337h
.CODE
start:
mov eax,magicalnumber
invoke crt__itoa, eax, offset somestring, 10h |
or
| Code: | .DATA
somestring db 50 dUP(00)
magicalnumber dd 13371337h
.CODE
start:
push 16
push offset somestring
push magicalnumber
call crt__itoa
add esp,0ch |
They do the same thing. Make sure you import msvcrt though...
For string to int I just use StrToInt... if the string is, say "10" it'll return 10 in eax(0x0a), and if the string is, say "$10", it'll return 16 in eax(0x10). The $ sign simply means 'hexidecimal', You can use crt__atoi as well, but if the result is the same, I'm fine with being a slut for simplicity- in which StrToInt takes the cake. |
Thanks
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appalsap
Moderator
 Reputation: 0
Joined: 27 Apr 2006
Posts: 6753
Location: Pakistan
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| Posted: Sat Dec 15, 2007 12:51 am Post subject: |
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The source code for the Microsoft Visual C++ runtime library comes with visual studio, for compilation purposes, not sure on their copying stance though.
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