FreeBSD/Linux Kernel Cross Reference
sys/i386/stdarg.h
1 /*
2 * Mach Operating System
3 * Copyright (c) 1993 Carnegie Mellon University
4 * All Rights Reserved.
5 *
6 * Permission to use, copy, modify and distribute this software and its
7 * documentation is hereby granted, provided that both the copyright
8 * notice and this permission notice appear in all copies of the
9 * software, derivative works or modified versions, and any portions
10 * thereof, and that both notices appear in supporting documentation.
11 *
12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
13 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
15 *
16 * Carnegie Mellon requests users of this software to return to
17 *
18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
19 * School of Computer Science
20 * Carnegie Mellon University
21 * Pittsburgh PA 15213-3890
22 *
23 * any improvements or extensions that they make and grant Carnegie Mellon
24 * the rights to redistribute these changes.
25 */
26 /*
27 * HISTORY
28 * $Log: stdarg.h,v $
29 * Revision 2.2 93/11/17 19:11:46 dbg
30 * Created.
31 * [93/10/27 dbg]
32 *
33 */
34
35 #ifndef _I386_STDARG_H_
36 #define _I386_STDARG_H_
37
38 /*
39 * STDARG for i386
40 *
41 * All arguments are on the stack.
42 * Sizes are rounded to the nearest integer (4 bytes).
43 */
44
45 typedef char * va_list;
46
47 #define va_start(ap, last) ((ap) = (char *)(&(last)+1))
48 #define va_end(ap)
49
50 #define va_arg(ap, type) \
51 ( (ap) += ((sizeof(type)+3) & ~0x3), /* advance */ \
52 *((type *)((ap) - ((sizeof(type)+3) & ~0x3))) )
53
54 #endif /* _I386_STDARG_H_ */
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