glibc/sysdeps/generic/varargs.h

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1995-02-18 01:27:10 +00:00
/* Copyright (C) 1991 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#ifndef _VARARGS_H
#define _VARARGS_H 1
#include <features.h>
#ifdef __GNUC__
#define va_alist __builtin_va_alist
#define va_dcl int __builtin_va_alist;
#define va_list char *
#ifdef __sparc__
#define va_start(AP) \
(__builtin_saveregs (), \
AP = ((void *) &__builtin_va_alist))
#else
#define va_start(AP) AP=(char *) &__builtin_va_alist
#endif
#define va_end(AP)
#define __va_rounded_size(TYPE) \
(((sizeof (TYPE) + sizeof (int) - 1) / sizeof (int)) * sizeof (int))
#define va_arg(AP, TYPE) \
(*((TYPE *) (AP += __va_rounded_size (TYPE), \
AP - __va_rounded_size (TYPE))))
#else /* Not GCC. */
/* Implement varargs on top of our stdarg implementation. */
#include <stdarg.h>
#define va_alist __va_fakearg
#define va_dcl int __va_fakearg;
#undef va_start
#define va_start(ap) (__va_start((ap), __va_fakearg), \
(ap) -= sizeof(__va_fakearg))
#endif /* GCC. */
#endif /* varargs.h */