freebsd-dev/sys/alpha/include/stdarg.h
Mike Barcroft 0b058e3cbd o Add conditionals to allow va_list to be defined in other headers.
o Standardize on _MACHINE_STDARG_H_ to allow multiple header includes.
o Restrict the definition of va_copy() to C99 environments.
2002-10-06 22:01:07 +00:00

93 lines
3.3 KiB
C

/*-
* Copyright (c) 2002 David E. O'Brien. All rights reserved.
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* 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. 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, Berkeley and its contributors.
* 4. 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.
*
* @(#)stdarg.h 8.1 (Berkeley) 6/10/93
* $NetBSD: stdarg.h,v 1.7 1997/04/06 08:47:44 cgd Exp $
* $FreeBSD$
*/
#ifndef _MACHINE_STDARG_H_
#define _MACHINE_STDARG_H_
#include <sys/cdefs.h>
#include <sys/_types.h>
#ifndef _VA_LIST_DECLARED
#define _VA_LIST_DECLARED
typedef __va_list va_list;
#endif
#if defined(__GNUC__) && (__GNUC__ == 2 && __GNUC_MINOR__ > 95 || __GNUC__ >= 3)
#define va_start(ap, last) \
__builtin_stdarg_start((ap), (last))
#define va_arg(ap, type) \
__builtin_va_arg((ap), type)
#if __ISO_C_VISIBLE >= 1999
#define va_copy(dest, src) \
__builtin_va_copy((dest), (src))
#endif
#define va_end(ap) \
__builtin_va_end(ap)
#else /* ! __GNUC__ post GCC 2.95 */
#ifdef __lint__
#define __builtin_saveregs() (0)
#define __builtin_classify_type(t) (0)
#endif
#define __va_size(type) \
(((sizeof(type) + sizeof(long) - 1) / sizeof(long)) * sizeof(long))
#define va_start(ap, last) \
(__builtin_next_arg(last), (ap) = *(va_list *)__builtin_saveregs(), (ap).__pad = 0)
#define __REAL_TYPE_CLASS 8
#define __va_arg_offset(ap, type) \
((__builtin_classify_type(*(type *)0) == __REAL_TYPE_CLASS && \
(ap).__offset <= (6 * 8) ? -(6 * 8) : 0) - __va_size(type))
#define va_arg(ap, type) \
(*(type *)((ap).__offset += __va_size(type), \
(ap).__base + (ap).__offset + __va_arg_offset(ap, type)))
#define va_end(ap) ((void)0)
#endif /* __GNUC__ post GCC 2.95 */
#endif /* !_MACHINE_STDARG_H_ */