include/ansidecl.h

   1 /* ANSI and traditional C compatability macros
   2    Copyright 1991 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation; either version 2 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  18
  19 /* ANSI and traditional C compatibility macros
  20
  21    ANSI C is assumed if __STDC__ is #defined.
  22
  23    Macro        ANSI C definition       Traditional C definition
  24    -----        ---- - ----------       ----------- - ----------
  25    PTR          `void *'                `char *'
  26    LONG_DOUBLE  `long double'           `double'
  27    CONST        `const'                 `'
  28    VOLATILE     `volatile'              `'
  29    SIGNED       `signed'                `'
  30    PTRCONST     `void *const'           `char *'
  31
  32    DEFUN(name, arglist, args)
  33
  34         Defines function NAME.
  35
  36         ARGLIST lists the arguments, separated by commas and enclosed in
  37         parentheses.  ARGLIST becomes the argument list in traditional C.
  38
  39         ARGS list the arguments with their types.  It becomes a prototype in
  40         ANSI C, and the type declarations in traditional C.  Arguments should
  41         be separated with `AND'.  For functions with a variable number of
  42         arguments, the last thing listed should be `DOTS'.
  43
  44    DEFUN_VOID(name)
  45
  46         Defines a function NAME, which takes no arguments.
  47
  48    EXFUN(name, prototype)
  49
  50         Is used in an external function declaration.
  51         In ANSI C it is `NAMEPROTOTYPE' (so PROTOTYPE should be enclosed in
  52         parentheses).  In traditional C it is `NAME()'.
  53         For a function that takes no arguments, PROTOTYPE should be `(NOARGS)'.
  54
  55     For example:
  56         extern int EXFUN(printf, (CONST char *format DOTS));
  57         int DEFUN(fprintf, (stream, format),
  58                   FILE *stream AND CONST char *format DOTS) { ... }
  59         void DEFUN_VOID(abort) { ... }
  60 */
  61
  62 #ifndef _ANSIDECL_H
  63
  64 #define _ANSIDECL_H     1
  65
  66
  67 /* Every source file includes this file,
  68    so they will all get the switch for lint.  */
  69 /* LINTLIBRARY */
  70
  71
  72 #ifdef  __STDC__
  73
  74 #define PTR             void *
  75 #define PTRCONST        void *CONST
  76 #define LONG_DOUBLE     long double
  77
  78 #define AND             ,
  79 #define NOARGS          void
  80 #define CONST           const
  81 #define VOLATILE        volatile
  82 #define SIGNED          signed
  83 #define DOTS            , ...
  84
  85 #define EXFUN(name, proto)              name proto
  86 #define DEFUN(name, arglist, args)      name(args)
  87 #define DEFUN_VOID(name)                name(NOARGS)
  88
  89 #define PROTO(type, name, arglist) type name arglist
  90 #endif
  91
  92 #else   /* Not ANSI C.  */
  93
  94 #define PTR             char *
  95 #define PTRCONST        PTR
  96 #define LONG_DOUBLE     double
  97
  98 #define AND             ;
  99 #define NOARGS
 100 #define CONST
 101 #define VOLATILE
 102 #define SIGNED
 103 #define DOTS
 104
 105 #define EXFUN(name, proto)              name()
 106 #define DEFUN(name, arglist, args)      name arglist args;
 107 #define DEFUN_VOID(name)                name()
 108 #define PROTO(type, name, arglist) type name ()
 109 #endif  /* ANSI C.  */
 110
 111
 112 #endif  /* ansidecl.h   */