1 /*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)stdarg.h 5.5 (Berkeley) 02/22/91 8 */ 9 10 #ifndef _STDARG_H 11 #define _STDARG_H 12 13 typedef char *va_list; 14 15 #define va_arg(ap, type) \ 16 ((type *)(ap += sizeof(type) < sizeof(int) ? \ 17 (abort(), 0) : sizeof(type)))[-1] 18 19 #define va_end(ap) 20 21 #define __va_promote(type) \ 22 (((sizeof(type) + sizeof(int) - 1) / sizeof(int)) * sizeof(int)) 23 24 #define va_start(ap, last) \ 25 (ap = ((char *)&(last) + __va_promote(last))) 26 27 #endif /* !_STDARG_H */ 28