I'm creating an application using the fastcgi library, and their method of printing is a little verbose. I'm trying to wrap their fprintf function in my own method:
I would like to turn
FCGX_FPrintF(out, char* fmt, ...);
into
write(char* strFormat, ...);
I've found the magic of va_list but can't find an easy way to pass va_list values into their fprintf function. Is there a way to do this? I know vsprintf and vprintf exist so it must be harder than I imagine it is.
If all else fails, I'll just overload a write function
You would have to find the analogue of vfprintf()
in the Fast CGI library. It is at least moderately plausible that there is one; the easy way to implement FCGX_FPrintF()
is:
void FCGX_FPrintF(FILE *out, char *fmt, ...)
{
va_list args;
va_start(args, fmt);
FCGX_VFPrintF(out, fmt, args);
va_end(args);
}
So it is highly probable that the function exists; you will need to check whether it is exposed officially or not.
A quick visit to the Fast CGI web site reveals that the FCGX prefix is used by functions declared in the fgciapp.h header, and that in turn contains:
/*
*----------------------------------------------------------------------
*
* FCGX_FPrintF, FCGX_VFPrintF --
*
* Performs printf-style output formatting and writes the results
* to the output stream.
*
* Results:
* number of bytes written for normal return,
* EOF (-1) if an error occurred.
*
*----------------------------------------------------------------------
*/
DLLAPI int FCGX_FPrintF(FCGX_Stream *stream, const char *format, ...);
DLLAPI int FCGX_VFPrintF(FCGX_Stream *stream, const char *format, va_list arg);
So, there's the function with the interface completed.
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