stdarg.h

一个PIC的demo程序包

/*	Macros for accessing variable arguments */

#ifndef	_STDARG

#if	(defined(i8051) && !defined(EXTERNAL_STACK))
typedef near void * va_list[1];
#define	va_start(ap, parmn)	*ap = __va_start((void *)&parmn)
#pragma inline(__va_start)
extern near void *		__va_start(void *);
#define	va_arg(ap, type)	(*--*(type near **)(ap))
#define	_STDARG
#elif	defined(m6805)
typedef near void * va_list[1];
#define	va_start(ap, parmn)	*ap = __va_start()
#pragma inline(__va_start)
extern near void *		__va_start(void);
#define	va_arg(ap, type)	(*(*(type near **)ap)++)
#define	_STDARG
#elif	defined(_MPC_)
typedef void * va_list[1];
#define	va_start(ap, parmn)	*ap = __va_start()
#pragma inline(__va_start)
extern void *		__va_start(void);
#define	va_arg(ap, type)	(*(*(type **)ap)++)
#define	_STDARG
#else
typedef void *	va_list[1];
#endif

#ifdef	i8086
#ifdef	FLAT_MODEL
#define	_STACK_ALIGN	4
#else
#define	_STACK_ALIGN	2
#endif
#endif

#if	defined(z80) || defined(_XA_)
#define	_STACK_ALIGN	2
#endif

#ifdef	_STACK_ALIGN	
#define	va_start(ap, parmn)	*ap = (char *)&parmn + ((sizeof(parmn)+_STACK_ALIGN-1)&~(_STACK_ALIGN-1))
#define	va_arg(ap, type)	(*(*(type **)ap)++)
#define	_STDARG
#endif

#ifndef	_STDARG
#define	va_start(ap, parmn)	*ap = (char *)&parmn + sizeof parmn
#define	va_arg(ap, type)	(*(*(type **)ap)++)
#define	_STDARG
#endif

#define	va_end(ap)


#endif	/* STDARG */