2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 2002 David E. O'Brien. All rights reserved.
5 * Copyright (c) 2017 Poul-Henning Kamp. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #ifndef _SYS__STDARG_H_
35 #define _SYS__STDARG_H_
37 #include <sys/cdefs.h>
38 #include <sys/_types.h>
40 #ifndef _VA_LIST_DECLARED
41 #define _VA_LIST_DECLARED
42 typedef __va_list va_list;
45 #ifdef __GNUCLIKE_BUILTIN_STDARG
46 #define va_start(ap, last) __builtin_va_start((ap), (last))
47 #define va_arg(ap, type) __builtin_va_arg((ap), type)
48 #define __va_copy(dest, src) __builtin_va_copy((dest), (src))
49 #if __ISO_C_VISIBLE >= 1999
50 #define va_copy(dest, src) __va_copy(dest, src)
52 #define va_end(ap) __builtin_va_end(ap)
55 #if defined(lint) && !defined(va_start)
57 * Provide a fake implementation for lint's benefit
58 * This very much assumes that __va_list ends up being a pointer
60 #define va_start(ap, last) ((void)((ap) = (char *) (&(last)+1)))
61 #if __ISO_C_VISIBLE >= 1999
62 #define va_copy(dst, src) ((dst) = (src))
64 #define va_arg(ap, type) (*((type*)(((ap) += sizeof(type)) - sizeof(type))))
65 #define va_end(ap) ((void)0)
68 #endif /* ! _SYS__STDARG_H_ */