Variable arguments in C, how to get values with a generic type?

Question

I\'m trying to use C stdarg.h lib, with a generic type. The type int, is my generic type > to understand it, please, hold reading. So, my problem is:

I have a functi

Answer 1

Use a void * (or a typed structure) for each parameter & use a structure with a "type" argument (an integer). A pointer / union to contain the actual value.

In other words, each parameter is passed with a pointer to a typed structure. Each instance of this typed structure contains a value. The type of this "value" is contained in this typed structure.

Better Example:

typedef struct  {
  int type;
  union {
    int int_value;
    double double_value;
    ...
  };
} Param;

void function(Param *p1, Param *p2, ...)

The latest example of such trick I ran into was DBus.