sys/cpu/i386/include/stdarg.h

   1 /*-
   2  * Copyright (c) 1991, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  *      @(#)stdarg.h    8.1 (Berkeley) 6/10/93
  34  * $FreeBSD: src/sys/i386/include/stdarg.h,v 1.10 1999/08/28 00:44:26 peter Exp $
  35  * $DragonFly: src/sys/cpu/i386/include/stdarg.h,v 1.8 2008/01/13 18:02:20 corecode Exp $
  36  */
  37
  38 #ifndef _CPU_STDARG_H_
  39 #define _CPU_STDARG_H_
  40
  41 /*
  42  * GNUC mess
  43  */
  44 #if defined(__GNUC__)
  45 typedef __builtin_va_list       __va_list;      /* internally known to gcc */
  46 #else
  47 typedef char *                  __va_list;
  48 #endif /* post GCC 2.95 */
  49 #if defined __GNUC__ && !defined(__GNUC_VA_LIST) && !defined(__NO_GNUC_VA_LIST)
  50 #define __GNUC_VA_LIST
  51 typedef __va_list               __gnuc_va_list; /* compatibility w/GNU headers*/
  52 #endif
  53
  54 /*
  55  * Standard va types and macros
  56  */
  57 #define __va_size(type) \
  58         (((sizeof(type) + sizeof(int) - 1) / sizeof(int)) * sizeof(int))
  59
  60 #ifdef __GNUC__
  61
  62 #define __va_start(ap, last) \
  63         __builtin_va_start(ap, last)
  64 #define __va_arg(ap, type) \
  65         __builtin_va_arg((ap), type)
  66 #define __va_copy(dest, src) \
  67         __builtin_va_copy((dest), (src))
  68 #define __va_end(ap) \
  69         __builtin_va_end(ap)
  70
  71 #else /* !__GNUC__ */
  72
  73 /* Provide a free-standing implementation */
  74 #define __va_start(ap, last) \
  75         ((ap) = (__va_list)&(last) + __va_size(last))
  76 #define __va_arg(ap, type) \
  77         (*(type *)((ap) += __va_size(type), (ap) - __va_size(type)))
  78 /* This assumes a typical stack machine */
  79 #define __va_copy(dest, src) \
  80         ((void)((dest) = (src)))
  81 #define __va_end(ap)
  82
  83 #endif /* __GNUC__ */
  84
  85 #endif /* !_CPU_STDARG_H_ */