varargs.h revision 96317 
1/*-
2 * Copyright (c) 2002 David E. O'Brien.  All rights reserved.
3 * Copyright (c) 1990, 1993
4 *	The Regents of the University of California.  All rights reserved.
5 * (c) UNIX System Laboratories, Inc.
6 * All or some portions of this file are derived from material licensed
7 * to the University of California by American Telephone and Telegraph
8 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
9 * the permission of UNIX System Laboratories, Inc.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 *    must display the following acknowledgement:
21 *	This product includes software developed by the University of
22 *	California, Berkeley and its contributors.
23 * 4. Neither the name of the University nor the names of its contributors
24 *    may be used to endorse or promote products derived from this software
25 *    without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 *
39 *	@(#)varargs.h	8.2 (Berkeley) 3/22/94
40 * $FreeBSD: head/sys/i386/include/varargs.h 96317 2002-05-10 02:02:54Z obrien $
41 */
42
43#ifndef _VARARGS_H_
44#define	_VARARGS_H_
45
46#if defined(__GNUC__) && (__GNUC__ == 2 && __GNUC_MINOR__ > 95 || __GNUC__ >= 3)
47
48#include <machine/ansi.h>
49
50typedef _BSD_VA_LIST_ va_list;
51typedef int __builtin_va_alist_t __attribute__((__mode__(__word__)));
52
53#define	va_alist		__builtin_va_alist
54#define	va_dcl			__builtin_va_alist_t __builtin_va_alist; ...
55#define	va_start(ap)		__builtin_varargs_start(ap)
56#define	va_arg(ap, type)	__builtin_va_arg((ap), type)
57#define	va_end(ap)		__builtin_va_end(ap)
58
59#else	/* ! __GNUC__ post GCC 2.95 */
60
61typedef char *va_list;
62
63#define	__va_size(type) \
64	(((sizeof(type) + sizeof(int) - 1) / sizeof(int)) * sizeof(int))
65
66#ifdef __GNUC__
67#define	va_alist	__builtin_va_alist
68#endif
69#if __GNUC__ > 1
70#define	va_dcl	int va_alist; ...
71#else
72#define	va_dcl	int va_alist;
73#endif
74
75#define	va_start(ap) \
76	((ap) = (va_list)&va_alist)
77
78#define	va_arg(ap, type) \
79	(*(type *)((ap) += __va_size(type), (ap) - __va_size(type)))
80
81#define	va_end(ap)
82
83#endif /* __GNUC__ post GCC 2.95 */
84
85#endif /* !_VARARGS_H_ */
86