[solved] sprintf did exist variant pointer to array ?

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Index > Windows > [solved] sprintf did exist variant pointer to array ?

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Roman

Joined: 21 Apr 2012
Posts: 1791

Roman 10 Jan 2021, 13:34

I know this.
cinvoke sprintf,str, "%s %d %s", "one", 2, "3"

But i need dynamic changed parameters !
And i search somthing like this:

Code:

pParams dd pTxt1,pInt1,pInt2
pTxt1 db 'one',0
pInt1 dd 2
pInt2 dd 3

cinvoke sprintf,str, "%s %d %d", pParams

I don`t want do loop:
for (i = 0; i<3; i++)
sprintf("%d ", pParams[i]);

10 Jan 2021, 13:34

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20333
Location: In your JS exploiting you and your system

revolution 10 Jan 2021, 13:51

Read about vsprintf

BTW: This isn't Windows related, it is about the C runtime library.

10 Jan 2021, 13:51

Roman

Joined: 21 Apr 2012
Posts: 1791

Roman 10 Jan 2021, 14:24

Thanks.
This is what i wanted.

10 Jan 2021, 14:24

ProMiNick

Joined: 24 Mar 2012
Posts: 799
Location: Russian Federation, Sochi

ProMiNick 10 Jan 2021, 14:48

by the way why so exotic as sprintf?
why not user32.dll.wsprintfA? user32.dll.wsprintfW?
or with varargs user32.dll.wvsprintfA? user32.dll.wvsprintfW?
in user32.dll more faster variant

10 Jan 2021, 14:48

Roman

Joined: 21 Apr 2012
Posts: 1791

Roman 10 Jan 2021, 18:50

wvsprintfA
https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-wvsprintfa
The buffer that is to receive the formatted output. The maximum size of the buffer is 1,024 bytes.

Hm. Strange why only 1 024 bytes ?

10 Jan 2021, 18:50

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20333
Location: In your JS exploiting you and your system

revolution 10 Jan 2021, 23:49

Roman wrote:

Hm. Strange why only 1 024 bytes ?

Ask MS, they decided it.

10 Jan 2021, 23:49

AsmGuru62

Joined: 28 Jan 2004
Posts: 1620
Location: Toronto, Canada

AsmGuru62 11 Jan 2021, 04:32

Also, wsprintf() does not format floating point values, but sprintf() does.

11 Jan 2021, 04:32

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