GC ifdef magic for old gcc version.
[dragonfly.git] / sys / cpu / amd64 / include / stdarg.h
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1/*-
2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)stdarg.h 8.1 (Berkeley) 6/10/93
34 * $FreeBSD: src/sys/i386/include/stdarg.h,v 1.10 1999/08/28 00:44:26 peter Exp $
241a69f5 35 * $DragonFly: src/sys/cpu/amd64/include/stdarg.h,v 1.2 2008/01/13 18:02:20 corecode Exp $
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36 */
37
38#ifndef _CPU_STDARG_H_
39#define _CPU_STDARG_H_
40
41/*
42 * GNUC mess
43 */
241a69f5 44#if defined(__GNUC__)
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45typedef __builtin_va_list __va_list; /* internally known to gcc */
46#else
47typedef char * __va_list;
48#endif /* post GCC 2.95 */
49#if defined __GNUC__ && !defined(__GNUC_VA_LIST) && !defined(__NO_GNUC_VA_LIST)
50#define __GNUC_VA_LIST
51typedef __va_list __gnuc_va_list; /* compatibility w/GNU headers*/
52#endif
53
54/*
55 * Standard va types and macros
56 */
57#define __va_size(type) \
58 (((sizeof(type) + sizeof(int) - 1) / sizeof(int)) * sizeof(int))
59
60#ifdef __GNUC__
61
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62#define __va_start(ap, last) \
63 __builtin_va_start(ap, last)
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64#define __va_arg(ap, type) \
65 __builtin_va_arg((ap), type)
66#define __va_copy(dest, src) \
67 __builtin_va_copy((dest), (src))
68#define __va_end(ap) \
69 __builtin_va_end(ap)
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70
71#else /* !__GNUC__ */
72
73/* Provide a free-standing implementation */
74#define __va_start(ap, last) \
75 ((ap) = (__va_list)&(last) + __va_size(last))
76#define __va_arg(ap, type) \
77 (*(type *)((ap) += __va_size(type), (ap) - __va_size(type)))
78/* This assumes a typical stack machine */
79#define __va_copy(dest, src) \
80 ((void)((dest) = (src)))
81#define __va_end(ap)
82
83#endif /* __GNUC__ */
84
85#endif /* !_CPU_STDARG_H_ */