2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2002 David E. O'Brien. All rights reserved.
5 * Copyright (c) 1992, 1993
6 * The Regents of the University of California. All rights reserved.
8 * This software was developed by the Computer Systems Engineering group
9 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
10 * contributed to Berkeley.
12 * All advertising materials mentioning features or use of this software
13 * must display the following acknowledgement:
14 * This product includes software developed by the University of
15 * California, Lawrence Berkeley Laboratory.
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions
20 * 1. Redistributions of source code must retain the above copyright
21 * notice, this list of conditions and the following disclaimer.
22 * 2. Redistributions in binary form must reproduce the above copyright
23 * notice, this list of conditions and the following disclaimer in the
24 * documentation and/or other materials provided with the distribution.
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * @(#)stdarg.h 8.2 (Berkeley) 9/27/93
39 * $NetBSD: stdarg.h,v 1.11 2000/07/23 21:36:56 mycroft Exp $
43 #ifndef _MACHINE_STDARG_H_
44 #define _MACHINE_STDARG_H_
46 #include <sys/cdefs.h>
47 #include <sys/_types.h>
49 #ifndef _VA_LIST_DECLARED
50 #define _VA_LIST_DECLARED
51 typedef __va_list va_list;
54 #ifdef __GNUCLIKE_BUILTIN_STDARG
56 #define va_start(ap, last) \
57 __builtin_va_start((ap), (last))
59 #define va_arg(ap, type) \
60 __builtin_va_arg((ap), type)
62 #if __ISO_C_VISIBLE >= 1999
63 #define va_copy(dest, src) \
64 __builtin_va_copy((dest), (src))
70 #else /* ! __GNUCLIKE_BUILTIN_STDARG */
72 #if !defined(__GNUCLIKE_BUILTIN_NEXT_ARG) && !defined(lint)
73 #error no support for your compiler
76 #define va_start(ap, last) \
77 (__builtin_next_arg(last), (ap) = (va_list)__builtin_saveregs())
81 #define __va_arg8(ap, type) \
82 (*(type *)(void *)((ap) += 8, (ap) - 8))
83 #define __va_arg16(ap, type) \
84 (*(type *)(void *)((ap) = (va_list)(((unsigned long)(ap) + 31) & -16),\
86 #define __va_int(ap, type) \
87 (*(type *)(void *)((ap) += 8, (ap) - sizeof(type)))
89 #define __REAL_TYPE_CLASS 8
90 #define __RECORD_TYPE_CLASS 12
91 #define va_arg(ap, type) \
92 (__builtin_classify_type(*(type *)0) == __REAL_TYPE_CLASS ? \
93 (__alignof__(type) == 16 ? __va_arg16(ap, type) : \
94 __va_arg8(ap, type)) : \
95 (__builtin_classify_type(*(type *)0) < __RECORD_TYPE_CLASS ? \
96 __va_int(ap, type) : \
97 (sizeof(type) <= 8 ? __va_arg8(ap, type) : \
98 (sizeof(type) <= 16 ? __va_arg16(ap, type) : \
99 *__va_arg8(ap, type *)))))
101 #endif /* __GNUCLIKE_BUILTIN_STDARG */
103 #endif /* !_MACHINE_STDARG_H_ */