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/* $OpenBSD: stdarg.h,v 1.15 2011/03/23 16:54:37 pirofti Exp $ */
/* $NetBSD: stdarg.h,v 1.10 1996/12/27 20:55:28 pk Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Lawrence Berkeley Laboratory.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: @(#)stdarg.h 8.2 (Berkeley) 9/27/93
*/
#ifndef _MACHINE_STDARG_H_
#define _MACHINE_STDARG_H_
#include <sys/cdefs.h>
#include <machine/_types.h>
#ifdef __lint__
#define __builtin_classify_type(t) (0)
#endif
typedef __va_list va_list;
#define __va_size(type) \
(((sizeof(type) + sizeof(long) - 1) / sizeof(long)) * sizeof(long))
#ifdef lint
#define va_start(ap,lastarg) ((ap) = (ap))
#else
#define va_start(ap, last) \
(__builtin_next_arg(last), (ap) = (va_list)__builtin_saveregs())
#endif /* lint */
/*
* va_arg picks up the next argument of type `type'. Appending an
* asterisk to `type' must produce a pointer to `type' (i.e., `type'
* may not be, e.g., `int (*)()').
*
* Gcc-2.x tries to use ldd/std for double and quad_t values, but Sun's
* brain-damaged calling convention does not quad-align these. Thus, for
* 8-byte arguments, we have to pick up the actual value four bytes at a
* time, and use type punning (i.e., a union) to produce the result.
* (We could also do this with a libc function, actually, by returning
* 8 byte integers in %o0+%o1 and the same 8 bytes as a double in %f0+%f1.)
*
* Note: We don't declare __d with type `type', since in C++ the type might
* have a constructor.
*/
#define __va_8byte(ap, type) \
__statement({ \
union { char __d[sizeof(type)]; int __i[2]; } __va_u; \
__va_u.__i[0] = ((int *)(void *)(ap))[0]; \
__va_u.__i[1] = ((int *)(void *)(ap))[1]; \
(ap) += 8; *(type *)(va_list)__va_u.__d; \
})
#define __va_arg(ap, type) \
(*(type *)((ap) += __va_size(type), \
(ap) - (sizeof(type) < sizeof(long) && \
sizeof(type) != __va_size(type) ? \
sizeof(type) : __va_size(type))))
#define __RECORD_TYPE_CLASS 12
#define va_arg(ap, type) \
(__builtin_classify_type(*(type *)0) >= __RECORD_TYPE_CLASS ? \
*__va_arg(ap, type *) : __va_size(type) == 8 ? \
__va_8byte(ap, type) : __va_arg(ap, type))
#if __ISO_C_VISIBLE >= 1999
#define __va_copy(dest, src) \
((dest) = (src))
#endif
#define va_end(ap)
#endif /* !_MACHINE_STDARG_H_ */
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