Pass va_list or pointer to va_list?

Question

Suppose I have a function which takes variadic arguments (...) or a va_list passed from another such function. The main logic is in this function i

Answer 1

Functions in standard C library pass va_list element itself (man 3 vprintf):

   #include 

   int vprintf(const char *format, va_list ap);
   int vfprintf(FILE *stream, const char *format, va_list ap);
   int vsprintf(char *str, const char *format, va_list ap);
   int vsnprintf(char *str, size_t size, const char *format, va_list ap);