sys/cpu/i386/include/varargs.h

   1 /*-
   2  * Copyright (c) 1990, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  * (c) UNIX System Laboratories, Inc.
   5  * All or some portions of this file are derived from material licensed
   6  * to the University of California by American Telephone and Telegraph
   7  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
   8  * the permission of UNIX System Laboratories, Inc.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. All advertising materials mentioning features or use of this software
  19  *    must display the following acknowledgement:
  20  *      This product includes software developed by the University of
  21  *      California, Berkeley and its contributors.
  22  * 4. Neither the name of the University nor the names of its contributors
  23  *    may be used to endorse or promote products derived from this software
  24  *    without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  36  * SUCH DAMAGE.
  37  *
  38  *      @(#)varargs.h   8.2 (Berkeley) 3/22/94
  39  * $FreeBSD: src/sys/i386/include/varargs.h,v 1.8 1999/08/28 00:44:27 peter Exp $
  40  * $DragonFly: src/sys/cpu/i386/include/varargs.h,v 1.4 2006/11/07 17:51:21 dillon Exp $
  41  */
  42
  43 #ifndef _CPU_VARARGS_H_
  44 #define _CPU_VARARGS_H_
  45
  46 typedef char *va_list;
  47
  48 #define __va_size(type) \
  49         (((sizeof(type) + sizeof(int) - 1) / sizeof(int)) * sizeof(int))
  50
  51 #ifdef __GNUC__
  52 #define va_alist        __builtin_va_alist
  53 #define va_dcl  int va_alist; ...
  54 #else
  55 #define va_dcl  int va_alist;
  56 #endif
  57
  58 #define va_start(ap) \
  59         ((ap) = (va_list)&va_alist)
  60
  61 #define va_arg(ap, type) \
  62         (*(type *)((ap) += __va_size(type), (ap) - __va_size(type)))
  63
  64 #define va_end(ap)
  65
  66 #endif /* !_CPU_VARARGS_H_ */