Re: [Mingw-users] asprintf missing, vsnprintf behaving differently and _vsncprintf undefined

[Jonathan S. <js-...@we...>]

Am 14.12.2008 um 20:34 schrieb Keith Marshall:

> On Sunday 14 December 2008 16:31:48 Jonathan Schleifer wrote:
>> The problem is this line:
>>
>> if ((size = vsnprintf(NULL, 0, fmt, args)) < 0)
>>
>> Which always sets size to -1 and thus fails.
>
> If you don't show us a minimal self-contained, (and complete), test
> case, how can you expect us to see what you might be doing wrong?

The test case is the asprintf.c which I linked. Try it with any format  
string, it will always return -1.

>  $ cat <<EOF > demo.c
>  #include <stdio.h>
>
>  int main()
>  {
>    char *argv[] = { "A string", NULL };
>    int l = vsnprintf( NULL, 0, "%s", (void *)(argv) );
>    printf( "Required size = %d\n", l );
>    return 0;
>  }
>  EOF
>
>  $ mingw32-gcc -o demo.exe demo.c
>
>  $ wine demo.exe
>  Required size = 8
>
> works for me, with GCC-3.4.5 and mingwrt-3.15.1.

That indeed works. I'll try to find out why yours does while mine  
doesn't.

--
Jonathan