Populating a va_list

Question

Is there a way to create a va_list from scratch? I\'m trying to call a function that takes a va_list as a parameter:

func(void **e         


        

Answer 1

Your stupid_func is perfectly valid C code, otherwise how would you supposedly call vprintf and similar functions?

The glib library make use of these wrappers extensively. The C99 specification itself has something similar in the examples. Excerpt from section 7.19.6.8:

The following shows the use of the vfprintf function in a general error-reporting routine.

#include 
#include 
void error(char *function_name, char *format, ...)
{
    va_list args;
    va_start(args, format);
    // print out name of function causing error
    fprintf(stderr, "ERROR in %s: ", function_name);
    // print out remainder of message
    vfprintf(stderr, format, args);
    va_end(args)
}