FreeBSD/Linux Kernel Cross Reference
sys/sys/stdarg.h

     /*      $NetBSD: stdarg.h,v 1.6 2022/10/08 15:48:01 christos Exp $      */
     
     /*-
      * Copyright (c) 1991, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)stdarg.h    8.1 (Berkeley) 6/10/93
     */
    
    #ifndef _SYS_STDARG_H_
    #define _SYS_STDARG_H_
    
    #include <sys/cdefs.h>
    #include <sys/ansi.h>
    #include <sys/featuretest.h>
    
    #ifdef __lint__
    #define __builtin_next_arg(t)           ((t) ? 0 : 0)
    #define __builtin_va_start(a, l)        ((a) = (va_list)(void *)&(l))
    #define __builtin_va_arg(a, t)          ((a) ? (t) 0 : (t) 0)
    #define __builtin_va_end(a)             __nothing
    #define __builtin_va_copy(d, s)         ((d) = (s))
    #elif !(__GNUC_PREREQ__(4, 5) || \
        (__GNUC_PREREQ__(4, 4) && __GNUC_PATCHLEVEL__ > 2) || defined(__clang__))
    #define __builtin_va_start(ap, last)    __builtin_stdarg_start((ap), (last))
    #endif
    
    #ifndef __VA_LIST_DECLARED
    typedef __va_list va_list;
    #define __VA_LIST_DECLARED
    #endif
    
    #define va_start(ap, last)      __builtin_va_start((ap), (last))
    #define va_arg                  __builtin_va_arg
    #define va_end(ap)              __builtin_va_end(ap)
    #define __va_copy(dest, src)    __builtin_va_copy((dest), (src))
    
    #if !defined(_ANSI_SOURCE) && \
        (defined(_ISOC99_SOURCE) || (__STDC_VERSION__ - 0) >= 199901L || \
         defined(_NETBSD_SOURCE))
    #define va_copy(dest, src)      __va_copy((dest), (src))
    #endif
    
    #endif /* !_SYS_STDARG_H_ */

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