sys/arch/alpha/include/stdarg.h

   1 /* $NetBSD: stdarg.h,v 1.12.2.4 2005/01/17 19:29:11 skrll Exp $ */
   2
   3 /*-
   4  * Copyright (c) 1991, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  *      @(#)stdarg.h    8.1 (Berkeley) 6/10/93
  32  */
  33
  34 #ifndef _ALPHA_STDARG_H_
  35 #define _ALPHA_STDARG_H_
  36
  37 #include <machine/ansi.h>
  38 #include <sys/featuretest.h>
  39
  40 typedef _BSD_VA_LIST_   va_list;
  41
  42 #ifdef __lint__
  43 #define va_start(a, l)          ((a).__base = (void *)&(l), (a).__offset = 0)
  44 #define va_arg(a, t)            ((t)((a).__base ? 0 : 0))
  45 #define va_end(a)               /* nothing */
  46 #else /* !__lint__ */
  47 #if __GNUC_PREREQ__(2, 96)
  48 #define va_start(ap, last)      __builtin_stdarg_start((ap), (last))
  49 #define va_arg                  __builtin_va_arg
  50 #define va_end                  __builtin_va_end
  51 #define __va_copy(dest, src)    __builtin_va_copy((dest), (src))
  52 #else
  53 #define __va_size(type) \
  54         (((sizeof(type) + sizeof(long) - 1) / sizeof(long)) * sizeof(long))
  55
  56 #define va_start(ap, last) \
  57         (__builtin_next_arg(last), (ap) = *(va_list *)__builtin_saveregs(), (ap).__pad = 0)
  58
  59 #define __REAL_TYPE_CLASS       8
  60 #define __va_arg_offset(ap, type)                                       \
  61         ((__builtin_classify_type(*(type *)0) == __REAL_TYPE_CLASS &&   \
  62             (ap).__offset <= (6 * 8) ? -(6 * 8) : 0) - __va_size(type))
  63
  64 #define va_arg(ap, type)                                                \
  65         (*(type *)((ap).__offset += __va_size(type),                    \
  66                    (ap).__base + (ap).__offset + __va_arg_offset(ap, type)))
  67
  68 #define va_end(ap)
  69
  70 #define __va_copy(dest, src)                                            \
  71         ((dest) = (src))
  72 #endif
  73 #endif /* __lint__ */
  74
  75 #if !defined(_ANSI_SOURCE) &&                                           \
  76     (defined(_ISOC99_SOURCE) || (__STDC_VERSION__ - 0) >= 199901L ||    \
  77      defined(_NETBSD_SOURCE))
  78 #define va_copy(dest, src)      __va_copy((dest), (src))
  79 #endif
  80
  81 #endif /* !_ALPHA_STDARG_H_ */