2 * SPDX-License-Identifier: BSD-4-Clause
4 * Copyright (c) 2002 David E. O'Brien. All rights reserved.
5 * Copyright (c) 1990, 1993
6 * The Regents of the University of California. All rights reserved.
7 * (c) UNIX System Laboratories, Inc.
8 * All or some portions of this file are derived from material licensed
9 * to the University of California by American Telephone and Telegraph
10 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
11 * the permission of UNIX System Laboratories, Inc.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. All advertising materials mentioning features or use of this software
22 * must display the following acknowledgement:
23 * This product includes software developed by the University of
24 * California, Berkeley and its contributors.
25 * 4. Neither the name of the University nor the names of its contributors
26 * may be used to endorse or promote products derived from this software
27 * without specific prior written permission.
29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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32 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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41 * @(#)varargs.h 8.2 (Berkeley) 3/22/94
45 #ifndef _MACHINE_VARARGS_H_
46 #define _MACHINE_VARARGS_H_
49 #error this file needs sys/cdefs.h as a prerequisite
52 #ifdef __GNUCLIKE_BUILTIN_VARARGS
54 #include <sys/_types.h>
56 #ifndef _VA_LIST_DECLARED
57 #define _VA_LIST_DECLARED
58 typedef __va_list va_list;
61 typedef int __builtin_va_alist_t __attribute__((__mode__(__word__)));
63 #define va_alist __builtin_va_alist
64 #define va_dcl __builtin_va_alist_t __builtin_va_alist; ...
65 #define va_start(ap) __builtin_varargs_start(ap)
66 #define va_arg(ap, type) __builtin_va_arg((ap), type)
67 #define va_end(ap) __builtin_va_end(ap)
69 #else /* !__GNUCLIKE_BUILTIN_VARARGS */
71 typedef char *va_list;
73 #define __va_size(type) \
74 (((sizeof(type) + sizeof(int) - 1) / sizeof(int)) * sizeof(int))
76 #if defined(__GNUCLIKE_BUILTIN_VAALIST)
77 #define va_alist __builtin_va_alist
79 #define va_dcl int va_alist; ...
81 #define va_start(ap) \
82 ((ap) = (va_list)&va_alist)
84 #define va_arg(ap, type) \
85 (*(type *)((ap) += __va_size(type), (ap) - __va_size(type)))
89 #endif /* __GNUCLIKE_BUILTIN_VARARGS */
91 #endif /* !_MACHINE_VARARGS_H_ */