The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/i386/include/stdarg.h

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    1 /*-
    2  * Copyright (c) 2002 David E. O'Brien.  All rights reserved.
    3  * Copyright (c) 1991, 1993
    4  *      The Regents of the University of California.  All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  * 3. All advertising materials mentioning features or use of this software
   15  *    must display the following acknowledgement:
   16  *      This product includes software developed by the University of
   17  *      California, Berkeley and its contributors.
   18  * 4. Neither the name of the University nor the names of its contributors
   19  *    may be used to endorse or promote products derived from this software
   20  *    without specific prior written permission.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   32  * SUCH DAMAGE.
   33  *
   34  *      @(#)stdarg.h    8.1 (Berkeley) 6/10/93
   35  * $FreeBSD: releng/7.3/sys/i386/include/stdarg.h 162487 2006-09-21 01:37:02Z kan $
   36  */
   37 
   38 #ifndef _MACHINE_STDARG_H_
   39 #define _MACHINE_STDARG_H_
   40 
   41 #include <sys/cdefs.h>
   42 #include <sys/_types.h>
   43 
   44 #ifndef _VA_LIST_DECLARED
   45 #define _VA_LIST_DECLARED
   46 typedef __va_list       va_list;
   47 #endif
   48 
   49 #ifdef __GNUCLIKE_BUILTIN_STDARG
   50 
   51 #define va_start(ap, last) \
   52         __builtin_va_start((ap), (last))
   53 
   54 #define va_arg(ap, type) \
   55         __builtin_va_arg((ap), type)
   56 
   57 #if __ISO_C_VISIBLE >= 1999
   58 #define va_copy(dest, src) \
   59         __builtin_va_copy((dest), (src))
   60 #endif
   61 
   62 #define va_end(ap) \
   63         __builtin_va_end(ap)
   64 
   65 #else   /* !__GNUCLIKE_BUILTIN_STDARG */
   66 
   67 #define __va_size(type) \
   68         (((sizeof(type) + sizeof(int) - 1) / sizeof(int)) * sizeof(int))
   69 
   70 #ifdef __GNUCLIKE_BUILTIN_NEXT_ARG
   71 #define va_start(ap, last) \
   72         ((ap) = (va_list)__builtin_next_arg(last))
   73 #else   /* !__GNUCLIKE_BUILTIN_NEXT_ARG */
   74 #define va_start(ap, last) \
   75         ((ap) = (va_list)&(last) + __va_size(last))
   76 #endif  /* __GNUCLIKE_BUILTIN_NEXT_ARG */
   77 
   78 #define va_arg(ap, type) \
   79         (*(type *)((ap) += __va_size(type), (ap) - __va_size(type)))
   80 
   81 #if __ISO_C_VISIBLE >= 1999
   82 #define va_copy(dest, src) \
   83         ((dest) = (src))
   84 #endif
   85 
   86 #define va_end(ap)
   87 
   88 #endif /* __GNUCLIKE_BUILTIN_STDARG */
   89 
   90 #endif /* !_MACHINE_STDARG_H_ */

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