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/** ANSI and traditional C compatability macros
Copyright 1991 Free Software Foundation, Inc.
This file is part of the GNU C Library.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
/** ANSI and traditional C compatibility macros
Some ANSI environments are "broken" in the sense that __STDC__ cannot be
relied upon to have it's intended meaning. Therefore we must use our own
concoction: _HAVE_STDC. Always use _HAVE_STDC instead of __STDC__ in newlib
ANSI C is assumed if _HAVE_STDC is #defined.
Macro ANSI C definition Traditional C definition
----- ---- - ---------- ----------- - ----------
PTR `void *' `char *'
LONG_DOUBLE `long double' `double'
CONST `const' `'
VOLATILE `volatile' `'
SIGNED `signed' `'
PTRCONST `void *const' `char *'
DEFUN(name, arglist, args)
Defines function NAME.
ARGLIST lists the arguments, separated by commas and enclosed in
parentheses. ARGLIST becomes the argument list in traditional C.
ARGS list the arguments with their types. It becomes a prototype in
ANSI C, and the type declarations in traditional C. Arguments should
be separated with `AND'. For functions with a variable number of
arguments, the last thing listed should be `DOTS'.
Defines a function NAME, which takes no arguments.
EXFUN(name, prototype)
Is used in an external function declaration.
In ANSI C it is `NAMEPROTOTYPE' (so PROTOTYPE should be enclosed in
parentheses). In traditional C it is `NAME()'.
For a function that takes no arguments, PROTOTYPE should be `(NOARGS)'.
For example:
extern int EXFUN(printf, (CONST char *format DOTS));
int DEFUN(fprintf, (stream, format),
FILE *stream AND CONST char *format DOTS) { ... }
void DEFUN_VOID(abort) { ... }
#ifndef _ANSIDECL_H
#define _ANSIDECL_H 1
/** Every source file includes this file,
so they will all get the switch for lint. */
#ifdef _HAVE_STDC
#define PTR void *
#define PTRCONST void *CONST
#define LONG_DOUBLE long double
#define AND ,
#define NOARGS void
#define CONST const
#define VOLATILE volatile
#define SIGNED signed
#define DOTS , ...
#define EXFUN(name, proto) name proto
#define DEFUN(name, arglist, args) name(args)
#define DEFUN_VOID(name) name(NOARGS)
#else /** Not ANSI C. */
#define PTR char *
#define LONG_DOUBLE double
#define AND ;
#define NOARGS
#define CONST
#define VOLATILE
#define SIGNED
#define DOTS
#define const
#define EXFUN(name, proto) name()
#define DEFUN(name, arglist, args) name arglist args;
#define DEFUN_VOID(name) name()
#endif /** ANSI C. */
#endif /** ansidecl.h */
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