varargs.h revision 143063 
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 * 4. Neither the name of the University nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 *	@(#)varargs.h	8.2 (Berkeley) 3/22/94
36 * $FreeBSD: head/sys/i386/include/varargs.h 143063 2005-03-02 21:33:29Z joerg $
37 */
38
39#ifndef _MACHINE_VARARGS_H_
40#define	_MACHINE_VARARGS_H_
41
42#ifndef _SYS_CDEFS_H_
43#error this file needs sys/cdefs.h as a prerequisite
44#endif
45
46#ifdef __GNUCLIKE_BUILTIN_VARARGS
47
48#include <sys/_types.h>
49
50#ifndef _VA_LIST_DECLARED
51#define	_VA_LIST_DECLARED
52typedef	__va_list	va_list;
53#endif
54
55typedef int __builtin_va_alist_t __attribute__((__mode__(__word__)));
56
57#define	va_alist		__builtin_va_alist
58#define	va_dcl			__builtin_va_alist_t __builtin_va_alist; ...
59#define	va_start(ap)		__builtin_varargs_start(ap)
60#define	va_arg(ap, type)	__builtin_va_arg((ap), type)
61#define	va_end(ap)		__builtin_va_end(ap)
62
63#else	/* !__GNUCLIKE_BUILTIN_VARARGS */
64
65typedef char *va_list;
66
67#define	__va_size(type) \
68	(((sizeof(type) + sizeof(int) - 1) / sizeof(int)) * sizeof(int))
69
70#if defined(__GNUCLIKE_BUILTIN_VAALIST)
71#define	va_alist	__builtin_va_alist
72#endif
73#ifdef __CC_SUPPORTS_VARADIC_XXX
74#define	va_dcl	int va_alist; ...
75#else
76#define	va_dcl	int va_alist;
77#endif
78
79#define	va_start(ap) \
80	((ap) = (va_list)&va_alist)
81
82#define	va_arg(ap, type) \
83	(*(type *)((ap) += __va_size(type), (ap) - __va_size(type)))
84
85#define	va_end(ap)
86
87#endif /* __GNUCLIKE_BUILTIN_VARARGS */
88
89#endif /* !_MACHINE_VARARGS_H_ */
90