1 /*- 2 * Copyright (c) 1992 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)stdarg.h 7.1 (Berkeley) 11/04/92 8 */ 9 10 typedef char *va_list; 11 12 #define __va_promote(type) \ 13 (((sizeof(type) + sizeof(int) - 1) / sizeof(int)) * sizeof(int)) 14 15 #define va_start(ap, last) \ 16 (ap = ((char *)&(last) + __va_promote(last))) 17 18 #ifdef KERNEL 19 #define va_arg(ap, type) \ 20 ((type *)(ap += sizeof(type)))[-1] 21 #else 22 #define va_arg(ap, type) \ 23 ((type *)(ap += sizeof(type) == sizeof(int) ? sizeof(type) : \ 24 sizeof(type) > sizeof(int) ? \ 25 (-(int)(ap) & ~(sizeof(type) - 1)) + sizeof(type) : \ 26 (abort(), 0)))[-1] 27 #endif 28 29 #define va_end(ap) 30