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/EXTERNAL_HEADERS/stdarg.h

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    1 /*
    2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
    3  *
    4  * @APPLE_LICENSE_HEADER_START@
    5  * 
    6  * The contents of this file constitute Original Code as defined in and
    7  * are subject to the Apple Public Source License Version 1.1 (the
    8  * "License").  You may not use this file except in compliance with the
    9  * License.  Please obtain a copy of the License at
   10  * http://www.apple.com/publicsource and read it before using this file.
   11  * 
   12  * This Original Code and all software distributed under the License are
   13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
   14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
   15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
   16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
   17  * License for the specific language governing rights and limitations
   18  * under the License.
   19  * 
   20  * @APPLE_LICENSE_HEADER_END@
   21  */
   22 /* stdarg.h for GNU.
   23    Note that the type used in va_arg is supposed to match the
   24    actual type **after default promotions**.
   25    Thus, va_arg (..., short) is not valid.  */
   26 
   27 #ifndef _STDARG_H
   28 #ifndef _ANSI_STDARG_H_
   29 #ifndef __need___va_list
   30 #define _STDARG_H
   31 #define _ANSI_STDARG_H_
   32 #endif /* not __need___va_list */
   33 #undef __need___va_list
   34 
   35 #ifdef __clipper__
   36 #include <va-clipper.h>
   37 #else
   38 #ifdef __m88k__
   39 #include <va-m88k.h>
   40 #else
   41 #ifdef __i860__
   42 #include <va-i860.h>
   43 #else
   44 #ifdef __hppa__
   45 #include <va-pa.h>
   46 #else
   47 #ifdef __mips__
   48 #include <va-mips.h>
   49 #else
   50 #ifdef __sparc__
   51 #include <va-sparc.h>
   52 #else
   53 #ifdef __i960__
   54 #include <va-i960.h>
   55 #else
   56 #ifdef __alpha__
   57 #include <va-alpha.h>
   58 #else
   59 #if defined (__H8300__) || defined (__H8300H__)
   60 #include <va-h8300.h>
   61 #else
   62 #if defined (__PPC__) && defined (_CALL_SYSV)
   63 #include <va-ppc.h>
   64 #else
   65 
   66 /* Define __gnuc_va_list.  */
   67 
   68 #ifndef __GNUC_VA_LIST
   69 #define __GNUC_VA_LIST
   70 #if defined(__svr4__) || defined(_AIX) || defined(_M_UNIX) || defined(__NetBSD__) || (defined(__APPLE__) && defined(__ppc__))
   71 typedef char *__gnuc_va_list;
   72 #else
   73 typedef void *__gnuc_va_list;
   74 #endif
   75 #endif
   76 
   77 /* Define the standard macros for the user,
   78    if this invocation was from the user program.  */
   79 #ifdef _STDARG_H
   80 
   81 /* Amount of space required in an argument list for an arg of type TYPE.
   82    TYPE may alternatively be an expression whose type is used.  */
   83 
   84 #if defined(sysV68)
   85 #define __va_rounded_size(TYPE)  \
   86   (((sizeof (TYPE) + sizeof (short) - 1) / sizeof (short)) * sizeof (short))
   87 #else
   88 #define __va_rounded_size(TYPE)  \
   89   (((sizeof (TYPE) + sizeof (int) - 1) / sizeof (int)) * sizeof (int))
   90 #endif
   91 
   92 #define va_start(AP, LASTARG)                                           \
   93  (AP = ((__gnuc_va_list) __builtin_next_arg (LASTARG)))
   94 
   95 #undef va_end
   96 void va_end (__gnuc_va_list);           /* Defined in libgcc.a */
   97 #define va_end(AP)      ((void)0)
   98 
   99 /* We cast to void * and then to TYPE * because this avoids
  100    a warning about increasing the alignment requirement.  */
  101 
  102 #if defined (__arm__) || defined (__i386__) || defined (__i860__) || defined (__ns32000__) || defined (__vax__)
  103 /* This is for little-endian machines; small args are padded upward.  */
  104 #define va_arg(AP, TYPE)                                                \
  105  (AP = (__gnuc_va_list) ((char *) (AP) + __va_rounded_size (TYPE)),     \
  106   *((TYPE *) (void *) ((char *) (AP) - __va_rounded_size (TYPE))))
  107 #else /* big-endian */
  108 /* This is for big-endian machines; small args are padded downward.  */
  109 #define va_arg(AP, TYPE)                                                \
  110  (AP = (__gnuc_va_list) ((char *) (AP) + __va_rounded_size (TYPE)),     \
  111   *((TYPE *) (void *) ((char *) (AP)                                    \
  112                        - ((sizeof (TYPE) < __va_rounded_size (char)     \
  113                            ? sizeof (TYPE) : __va_rounded_size (TYPE))))))
  114 #endif /* big-endian */
  115 #endif /* _STDARG_H */
  116 
  117 #endif /* not powerpc with V.4 calling sequence */
  118 #endif /* not h8300 */
  119 #endif /* not alpha */
  120 #endif /* not i960 */
  121 #endif /* not sparc */
  122 #endif /* not mips */
  123 #endif /* not hppa */
  124 #endif /* not i860 */
  125 #endif /* not m88k */
  126 #endif /* not clipper */
  127 
  128 #ifdef _STDARG_H
  129 /* Define va_list, if desired, from __gnuc_va_list. */
  130 /* We deliberately do not define va_list when called from
  131    stdio.h, because ANSI C says that stdio.h is not supposed to define
  132    va_list.  stdio.h needs to have access to that data type, 
  133    but must not use that name.  It should use the name __gnuc_va_list,
  134    which is safe because it is reserved for the implementation.  */
  135 
  136 #ifdef _HIDDEN_VA_LIST  /* On OSF1, this means varargs.h is "half-loaded".  */
  137 #undef _VA_LIST
  138 #endif
  139 
  140 #ifdef _BSD_VA_LIST
  141 #undef _BSD_VA_LIST
  142 #endif
  143 
  144 #ifdef __svr4__
  145 /* SVR4.2 uses _VA_LIST for an internal alias for va_list,
  146    so we must avoid testing it and setting it here.
  147    SVR4 uses _VA_LIST as a flag in stdarg.h, but we should
  148    have no conflict with that.  */
  149 #ifndef _VA_LIST_
  150 #define _VA_LIST_
  151 #ifdef __i860__
  152 #ifndef _VA_LIST
  153 #define _VA_LIST va_list
  154 #endif
  155 #endif /* __i860__ */
  156 typedef __gnuc_va_list va_list;
  157 #endif /* _VA_LIST_ */
  158 #else /* not __svr4__ */
  159 
  160 /* The macro _VA_LIST_ is the same thing used by this file in Ultrix.
  161    But on BSD NET2 we must not test or define or undef it.
  162    (Note that the comments in NET 2's ansi.h
  163    are incorrect for _VA_LIST_--see stdio.h!)  */
  164 #if !defined (_VA_LIST_) || defined (__BSD_NET2__) || defined (____386BSD____) || defined (__bsdi__) || defined (__sequent__) || defined (__FreeBSD__) || defined(WINNT)
  165 /* The macro _VA_LIST_DEFINED is used in Windows NT 3.5  */
  166 #ifndef _VA_LIST_DEFINED
  167 /* The macro _VA_LIST is used in SCO Unix 3.2.  */
  168 #ifndef _VA_LIST
  169 /* The macro _VA_LIST_T_H is used in the Bull dpx2  */
  170 #ifndef _VA_LIST_T_H
  171 typedef __gnuc_va_list va_list;
  172 #endif /* not _VA_LIST_T_H */
  173 #endif /* not _VA_LIST */
  174 #endif /* not _VA_LIST_DEFINED */
  175 #if !(defined (__BSD_NET2__) || defined (____386BSD____) || defined (__bsdi__) || defined (__sequent__) || defined (__FreeBSD__))
  176 #define _VA_LIST_
  177 #endif
  178 #ifndef _VA_LIST
  179 #define _VA_LIST
  180 #endif
  181 #ifndef _VA_LIST_DEFINED
  182 #define _VA_LIST_DEFINED
  183 #endif
  184 #ifndef _VA_LIST_T_H
  185 #define _VA_LIST_T_H
  186 #endif
  187 
  188 #endif /* not _VA_LIST_, except on certain systems */
  189 
  190 #endif /* not __svr4__ */
  191 
  192 #endif /* _STDARG_H */
  193 
  194 #endif /* not _ANSI_STDARG_H_ */
  195 #endif /* not _STDARG_H */

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