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/* @(#)vadefs.h 1.5 01/07/15 Copyright 1998 J. Schilling */
/*
* Generic header for users of var args ...
*
* Includes a default definition for va_copy()
* and some magic know how about the SVr4 Power PC var args ABI
* to create a __va_arg_list() macro.
*
* Copyright (c) 1998 J. Schilling
*/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef _VADEFS_H
#define _VADEFS_H
#ifndef _MCONFIG_H
#include <mconfig.h>
#endif
#ifdef PROTOTYPES
/*
* For ANSI C-compilers prefer stdarg.h
*/
# ifdef HAVE_STDARG_H
# ifndef _INCL_STDARG_H
# include <stdarg.h>
# define _INCL_STDARG_H
# endif
# else
# ifndef _INCL_VARARGS_H
# include <varargs.h>
# define _INCL_VARARGS_H
# endif
# endif
#else
/*
* For K&R C-compilers prefer varargs.h
*/
# ifdef HAVE_VARARGS_H
# ifndef _INCL_VARARGS_H
# include <varargs.h>
# define _INCL_VARARGS_H
# endif
# else
# ifndef _INCL_STDARG_H
# include <stdarg.h>
# define _INCL_STDARG_H
# endif
# endif
#endif
#if (defined(__linux__) || defined(__linux) || defined(sun)) && \
(defined(__ppc) || defined(__PPC) || defined(powerpc) || defined(__powerpc__))
# ifndef VA_LIST_IS_ARRAY
# define VA_LIST_IS_ARRAY
# endif
#endif
/*
* __va_copy() is used by GCC 2.8 or newer until va_copy() becomes
* a final ISO standard.
*/
#if !defined(va_copy) && !defined(HAVE_VA_COPY)
# if defined(__va_copy)
# define va_copy(to, from) __va_copy(to, from)
# endif
#endif
/*
* va_copy() is a Solaris extension to provide a portable way to perform a
* variable argument list "bookmarking" function.
* If it is not available via stdarg.h, use a simple assignement for backward
* compatibility.
*/
#if !defined(va_copy) && !defined(HAVE_VA_COPY)
#ifdef VA_LIST_IS_ARRAY
# define va_copy(to, from) ((to)[0] = (from)[0])
#else
# define va_copy(to, from) ((to) = (from))
#endif
#endif
/*
* I don't know any portable way to get an arbitrary
* C object from a var arg list so I use a
* system-specific routine __va_arg_list() that knows
* if 'va_list' is an array. You will not be able to
* assign the value of __va_arg_list() but it works
* to be used as an argument of a function.
* It is a requirement for recursive printf to be able
* to use this function argument. If your system
* defines va_list to be an array you need to know this
* via autoconf or another mechanism.
* It would be nice to have something like
* __va_arg_list() in stdarg.h
*/
#ifdef VA_LIST_IS_ARRAY
# define __va_arg_list(list) va_arg(list, void *)
#else
# define __va_arg_list(list) va_arg(list, va_list)
#endif
#endif /* _VADEFS_H */
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