• V <v pathlink.com> Apr 01 2005
• Derek Parnell <derek psych.ward> Apr 01 2005
• V <v pathlink.com> Apr 02 2005

V <v pathlink.com> writes:

How can I convert this to D?

#define va_start(ap,v)  ( ap = (va_list)_ADDRESSOF(v) + _INTSIZEOF(v) )

Derek Parnell <derek psych.ward> writes:

On Fri, 01 Apr 2005 20:39:24 -0800, V wrote:

 How can I convert this to D?
 
 #define va_start(ap,v)  ( ap = (va_list)_ADDRESSOF(v) + _INTSIZEOF(v) )


Generally speaking, you don't. You use the template va_arg which is found
in the std.stdarg.d module.

<code>
/*
 * Placed in public domain.
 * Written by Hauke Duden and Walter Bright
 */

/* This is for use with variable argument lists with extern(D) linkage. */

module std.stdarg;

alias void* va_list;

template va_arg(T)
{
    T va_arg(inout va_list _argptr)
    {
	T arg = *cast(T*)_argptr;
	_argptr = _argptr + ((T.sizeof + int.sizeof - 1) & ~(int.sizeof - 1));
	return arg;
    }
}

</code>

-- 
Derek Parnell
Melbourne, Australia
2/04/2005 4:58:48 PM

V <v pathlink.com> writes:

Thanks Derek,  I found va_start defined in std.c.stdarg

I hadn't seen it on the website but from now on, I'll just look in the 
actual src folders. :D

V

Derek Parnell wrote:
 On Fri, 01 Apr 2005 20:39:24 -0800, V wrote:
 
 
How can I convert this to D?

#define va_start(ap,v)  ( ap = (va_list)_ADDRESSOF(v) + _INTSIZEOF(v) )


 
 Generally speaking, you don't. You use the template va_arg which is found
 in the std.stdarg.d module.
 
 <code>
 /*
  * Placed in public domain.
  * Written by Hauke Duden and Walter Bright
  */
 
 /* This is for use with variable argument lists with extern(D) linkage. */
 
 module std.stdarg;
 
 alias void* va_list;
 
 template va_arg(T)
 {
     T va_arg(inout va_list _argptr)
     {
 	T arg = *cast(T*)_argptr;
 	_argptr = _argptr + ((T.sizeof + int.sizeof - 1) & ~(int.sizeof - 1));
 	return arg;
     }
 }
 
 </code>