va_list times 2!

[Sebastiani]

Are multiple variable argument lists possible?

That is if I have a function that already takes a variable argument list, can I extend this to take an additional list? I keep thinking I can set-up the second one so that it begins when I set the last parameter of the first list to "NULL", so that being called it would look like:

double_list_func( VA1a, VA1b, VA1c, NULL, VA2a, VA2b, VA2c, NULL);

//Whereas first "NULL" stops the first list and initiates the second and the last "NULL" stops the second list...

[Salem]

Haven't we done this before????

#include <stdio.h>
#include <stdarg.h>

void foo ( int x, ... ) {
    va_list ap;
    char *p;
    va_start( ap, x );
    while ( (p=va_arg(ap,char*)) != NULL ) {
        printf( "%s ", p );
    }
    printf( "\n" );
    while ( (p=va_arg(ap,char*)) != NULL ) {
        printf( "%s ", p );
    }
    printf( "\n" );
    va_end(ap);
}

int main ( ) {
    foo( 1, "hello", "world", NULL, "how", "are", "you", NULL );
    return 0;
}

[Sebastiani]

You are kidding me! All this time I have been trying to do this by creating a new va_list variable!!! Arghh!!! Thanks again, Salem. And by the way, sometimes your memory is just too good!