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0b058e3cbd
o Standardize on _MACHINE_STDARG_H_ to allow multiple header includes. o Restrict the definition of va_copy() to C99 environments.
98 lines
3.4 KiB
C
98 lines
3.4 KiB
C
/*
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* Copyright (c) 2002 David E. O'Brien. All rights reserved.
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Lawrence Berkeley Laboratory.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)stdarg.h 8.2 (Berkeley) 9/27/93
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* $NetBSD: stdarg.h,v 1.11 2000/07/23 21:36:56 mycroft Exp $
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* $FreeBSD$
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*/
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#ifndef _MACHINE_STDARG_H_
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#define _MACHINE_STDARG_H_
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#include <sys/cdefs.h>
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#include <sys/_types.h>
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#ifndef _VA_LIST_DECLARED
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#define _VA_LIST_DECLARED
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typedef __va_list va_list;
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#endif
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#if defined(__GNUC__) && (__GNUC__ == 2 && __GNUC_MINOR__ > 95 || __GNUC__ >= 3)
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#define va_start(ap, last) \
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__builtin_stdarg_start((ap), (last))
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#define va_arg(ap, type) \
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__builtin_va_arg((ap), type)
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#if __ISO_C_VISIBLE >= 1999
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#define va_copy(dest, src) \
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__builtin_va_copy((dest), (src))
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#endif
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#define va_end(ap) \
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__builtin_va_end(ap)
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#else /* ! __GNUC__ post GCC 2.95 */
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#define va_start(ap, last) \
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(__builtin_next_arg(last), (ap) = (va_list)__builtin_saveregs())
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#define va_end(ap)
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#define __va_arg8(ap, type) \
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(*(type *)(void *)((ap) += 8, (ap) - 8))
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#define __va_arg16(ap, type) \
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(*(type *)(void *)((ap) = (va_list)(((unsigned long)(ap) + 31) & -16),\
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(ap) - 16))
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#define __va_int(ap, type) \
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(*(type *)(void *)((ap) += 8, (ap) - sizeof(type)))
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#define __REAL_TYPE_CLASS 8
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#define __RECORD_TYPE_CLASS 12
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#define va_arg(ap, type) \
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(__builtin_classify_type(*(type *)0) == __REAL_TYPE_CLASS ? \
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(__alignof__(type) == 16 ? __va_arg16(ap, type) : \
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__va_arg8(ap, type)) : \
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(__builtin_classify_type(*(type *)0) < __RECORD_TYPE_CLASS ? \
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__va_int(ap, type) : \
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(sizeof(type) <= 8 ? __va_arg8(ap, type) : \
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(sizeof(type) <= 16 ? __va_arg16(ap, type) : \
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*__va_arg8(ap, type *)))))
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#endif /* __GNUC__ post GCC 2.95 */
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#endif /* !_MACHINE_STDARG_H_ */
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