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 5.4 (Berkeley) 06/26/90 8 */ 9 10 typedef char *va_list; 11 12 #define va_arg(ap, type) \ 13 ((type *)(ap += sizeof(type) < sizeof(int) ? \ 14 (abort(), 0) : sizeof(type)))[-1] 15 16 #define va_end(ap) 17 18 #define __va_promote(type) \ 19 (((sizeof(type) + sizeof(int) - 1) / sizeof(int)) * sizeof(int)) 20 21 #define va_start(ap, last) \ 22 (ap = ((char *)&(last) + __va_promote(last))) 23