Thread: initiating a va_list without va_start

To keep the context short & sweet:

Code:

typedef struct _NEW_PAWS
{
	NEW_PAWBUF buff;
	pawhhs args;
	va_list va;
} NEW_PAWS;

#define INIT_NEW_PAWS { INIT_NEW_PAWBUF, NULL, }

I need to know what to put in the 3rd parameter that's cross-compiler/platform safe as the equivalent of 0,false,NULL etc, the args member will be used to check if the va member should be used, I'm using this with a global "class" initialiser something like:

Code:

...
ud = PawAlloc( NULL, cls->size );
if ( ud )
{
	memset( ud, 0, cls->size );
	if ( cls->init && cls->init( id, ud, cfg ) != 0 )
	{
		PawAlloc( ud, 0 );
		return -1;
	}
	return id;
}
...
return -1;

So forcing an extra member isn't really a good solution and I don't want the compiler refusing to compile in specific setups just because the va member wasn't initialised.

I think I found my solution:

Code:

typedef struct _NEW_PAWS
{
    NEW_PAWBUF buff;
    pawhhs args;
    va_list *va;
} NEW_PAWS;
 
#define INIT_NEW_PAWS { INIT_NEW_PAWBUF, NULL, NULL }
...
PAW_API pawd PawMakeStringv( pawhhs args, va_list va )
{
	NEW_PAWS new = INIT_NEW_PAWS;
	new.args = args;
	new.va = (va_list*)&va;
	return PawTakeID( &clsPAWS, &new );
}

Seems to work without issue, still testing though

Edit: Just realised I forgot to put in the * character before va in my example struct