test/sdi/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 1.1 (06.06.2014)
   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: svn://svn.code.sf.net/p/adtools/code/trunk/sdi/SDI_stdarg.h $
  15
  16  1.0   05.07.2004 : initial version
  17  1.1   06.06.2014 : added a type cast to VA_ARG() result
  18
  19 */
  20
  21 /*
  22 ** This is PD (Public Domain). This means you can do with it whatever you want
  23 ** without any restrictions. I only ask you to tell me improvements, so I may
  24 ** fix the main line of this files as well.
  25 **
  26 ** To keep confusion level low: When changing this file, please note it in
  27 ** above history list and indicate that the change was not made by myself
  28 ** (e.g. add your name or nick name).
  29 **
  30 ** Find the latest version of this file at:
  31 ** http://sf.net/p/adtools/code/HEAD/tree/trunk/sdi/
  32 **
  33 ** Jens Maus <mail@jens-maus.de>
  34 ** Dirk Stöcker <soft@dstoecker.de>
  35 */
  36
  37 #include "SDI_compiler.h"
  38
  39 /*
  40 ** Variable arguments function macros to allow specification of the
  41 ** variable arguments typical functions like va_list/va_start/va_end in
  42 ** an operating system independent fashion.
  43 **
  44 ** With help of the following macro definition a developer might define
  45 ** variable arguments functions for different types of operating
  46 ** system implementations without having to clutter the sources with
  47 ** multiple "#ifdef" defines just because all of these operating systems
  48 ** come with different varable arguments support functions.
  49 **
  50 ** Example:
  51 **
  52 ** Instead of using the standard va_list, va_start and va_end functions
  53 ** of <stdarg.h>, a developer might specify the following sprintf()
  54 ** function to make it automatically compatible with AmigaOS3, AmigaOS4
  55 ** and also MorphOS.
  56 **
  57 ** int VARARGS68K sprintf(char *buf, char *fmt, ...)
  58 ** {
  59 **   VA_LIST args;
  60 **
  61 **   VA_START(args, fmt);
  62 **   RawDoFmt(fmt, VA_ARG(args, void *), NULL, buf);
  63 **   VA_END(args);
  64 **
  65 **   return(strlen(buf));
  66 ** }
  67 **
  68 ** Please note the uppercase letters of the macros in contrast to the
  69 ** official varargs functions specified in <stdarg.h>.
  70 **
  71 ** By using this schema a developer might ensure full source code backward
  72 ** compatibility to AmigaOS3 without having to introduce dozens of #ifdef
  73 ** statements in his code.
  74 */
  75
  76 #include <stdarg.h>
  77
  78 #ifdef VA_LIST
  79 #undef VA_LIST
  80 #endif
  81 #ifdef VA_START
  82 #undef VA_START
  83 #endif
  84 #ifdef VA_ARG
  85 #undef VA_ARG
  86 #endif
  87 #ifdef VA_END
  88 #undef VA_END
  89 #endif
  90
  91 #if defined(__amigaos4__)
  92   #define VA_LIST             va_list
  93   #define VA_START(va, start) va_startlinear((va), (start))
  94   #define VA_ARG(va, type)    va_getlinearva((va), type)
  95   #define VA_END(va)          va_end((va))
  96 #elif defined(__MORPHOS__)
  97   #define VA_LIST             va_list
  98   #define VA_START(va, start) va_start((va), (start))
  99   #define VA_ARG(va, type)    (type)((va)->overflow_arg_area)
 100   #define VA_END(va)          va_end((va))
 101 #else
 102   #define VA_LIST             va_list
 103   #define VA_START(va, start) va_start((va), (start))
 104   #define VA_ARG(va, type)    (type)(va)
 105   #define VA_END(va)          va_end((va))
 106 #endif
 107
 108 #endif /* SDI_STDARG_H */