workbench/classes/zune/nlist/include/SDI_stdarg.h

   1 #ifndef SDI_STDARG_H
   2 #define SDI_STDARG_H
   3
   4 /* Includeheader
   5
   6         Name:           SDI_stdarg.h
   7         Versionstring:  $VER: SDI_stdarg.h 1.0 (05.07.2004)
   8         Author:         Jens Maus
   9         Distribution:   PD
  10         Project page:   http://sf.net/p/adtools/code/HEAD/tree/trunk/sdi/
  11         Description:    defines to hide OS specific variable arguments
  12                         function definitions
  13         Id:             $Id$
  14         URL:            $URL: https://svn.code.sf.net/p/adtools/code/trunk/sdi/SDI_stdarg.h $
  15
  16  1.0   05.07.04 : initial version
  17
  18 */
  19
  20 /*
  21 ** This is PD (Public Domain). This means you can do with it whatever you want
  22 ** without any restrictions. I only ask you to tell me improvements, so I may
  23 ** fix the main line of this files as well.
  24 **
  25 ** To keep confusion level low: When changing this file, please note it in
  26 ** above history list and indicate that the change was not made by myself
  27 ** (e.g. add your name or nick name).
  28 **
  29 ** Find the latest version of this file at:
  30 ** http://sf.net/p/adtools/code/HEAD/tree/trunk/sdi/
  31 **
  32 ** Jens Maus <mail@jens-maus.de>
  33 ** Dirk Stöcker <soft@dstoecker.de>
  34 */
  35
  36 #include "SDI_compiler.h"
  37
  38 /*
  39 ** Variable arguments function macros to allow specification of the
  40 ** variable arguments typical functions like va_list/va_start/va_end in
  41 ** an operating system independent fashion.
  42 **
  43 ** With help of the following macro definition a developer might define
  44 ** variable arguments functions for different types of operating
  45 ** system implementations without having to clutter the sources with
  46 ** multiple "#ifdef" defines just because all of these operating systems
  47 ** come with different varable arguments support functions.
  48 **
  49 ** Example:
  50 **
  51 ** Instead of using the standard va_list, va_start and va_end functions
  52 ** of <stdarg.h>, a developer might specify the following sprintf()
  53 ** function to make it automatically compatible with AmigaOS3, AmigaOS4
  54 ** and also MorphOS.
  55 **
  56 ** int VARARGS68K sprintf(char *buf, char *fmt, ...)
  57 ** {
  58 **   VA_LIST args;
  59 **
  60 **   VA_START(args, fmt);
  61 **   RawDoFmt(fmt, VA_ARG(args, void *), NULL, buf);
  62 **   VA_END(args);
  63 **
  64 **   return(strlen(buf));
  65 ** }
  66 **
  67 ** Please note the uppercase letters of the macros in contrast to the
  68 ** official varargs functions specified in <stdarg.h>.
  69 **
  70 ** By using this schema a developer might ensure full source code backward
  71 ** compatibility to AmigaOS3 without having to introduce dozens of #ifdef
  72 ** statements in his code.
  73 */
  74
  75 #include <stdarg.h>
  76
  77 #ifdef VA_LIST
  78 #undef VA_LIST
  79 #endif
  80 #ifdef VA_START
  81 #undef VA_START
  82 #endif
  83 #ifdef VA_ARG
  84 #undef VA_ARG
  85 #endif
  86 #ifdef VA_END
  87 #undef VA_END
  88 #endif
  89
  90 #if defined(__amigaos4__)
  91   #define VA_LIST             va_list
  92   #define VA_START(va, start) va_startlinear((va), (start))
  93   #define VA_ARG(va, type)    va_getlinearva((va), type)
  94   #define VA_END(va)          va_end((va))
  95 #elif defined(__MORPHOS__)
  96   #define VA_LIST             va_list
  97   #define VA_START(va, start) va_start((va), (start))
  98   #define VA_ARG(va, type)    (va)->overflow_arg_area
  99   #define VA_END(va)          va_end((va))
 100 #else
 101   #define VA_LIST             va_list
 102   #define VA_START(va, start) va_start((va), (start))
 103   #define VA_ARG(va, type)    (va)
 104   #define VA_END(va)          va_end((va))
 105 #endif
 106
 107 #endif /* SDI_STDARG_H */