xref: /freebsd/sys/amd64/include/stdarg.h (revision dba6dd177bdee890cf445fbe21a5dccefd5de18e)
1 /*-
2  * Copyright (c) 2002 David E. O'Brien.  All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions
6  * are met:
7  * 1. Redistributions of source code must retain the above copyright
8  *    notice, this list of conditions and the following disclaimer.
9  * 2. Redistributions in binary form must reproduce the above copyright
10  *    notice, this list of conditions and the following disclaimer in the
11  *    documentation and/or other materials provided with the distribution.
12  * 3. Neither the name of the University nor the names of its contributors
13  *    may be used to endorse or promote products derived from this software
14  *    without specific prior written permission.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  *
28  * $FreeBSD$
29  */
30 
31 #ifndef _MACHINE_STDARG_H_
32 #define	_MACHINE_STDARG_H_
33 
34 #include <sys/cdefs.h>
35 #include <sys/_types.h>
36 
37 #ifndef _VA_LIST_DECLARED
38 #define	_VA_LIST_DECLARED
39 typedef	__va_list	va_list;
40 #endif
41 
42 #if defined(__GNUC__)
43 #define	va_start(ap, last) \
44 	__builtin_stdarg_start((ap), (last))
45 
46 #define	va_arg(ap, type) \
47 	__builtin_va_arg((ap), type)
48 
49 #define	__va_copy(dest, src) \
50 	__builtin_va_copy((dest), (src))
51 
52 #if __ISO_C_VISIBLE >= 1999
53 #define	va_copy(dest, src) \
54 	__va_copy(dest, src)
55 #endif
56 
57 #define	va_end(ap) \
58 	__builtin_va_end(ap)
59 
60 #elif defined(lint)
61 /* Provide a fake implementation for lint's benefit */
62 #define	__va_size(type) \
63 	(((sizeof(type) + sizeof(long) - 1) / sizeof(long)) * sizeof(long))
64 #define	va_start(ap, last) \
65 	((ap) = (va_list)&(last) + __va_size(last))
66 #define	va_arg(ap, type) \
67 	(*(type *)((ap) += __va_size(type), (ap) - __va_size(type)))
68 #define	va_end(ap)
69 
70 #endif
71 
72 #endif /* !_MACHINE_STDARG_H_ */
73