142 lines
4.3 KiB
C
Executable file
142 lines
4.3 KiB
C
Executable file
/* ANSI and traditional C compatibility macros
|
|
Copyright 1991, 1992 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
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
|
|
|
/* ANSI and traditional C compatibility macros
|
|
|
|
ANSI C is assumed if __STDC__ is #defined.
|
|
|
|
Macro ANSI C definition Traditional C definition
|
|
----- ---- - ---------- ----------- - ----------
|
|
PTR `void *' `char *'
|
|
LONG_DOUBLE `long double' `double'
|
|
VOLATILE `volatile' `'
|
|
SIGNED `signed' `'
|
|
PTRCONST `void *const' `char *'
|
|
ANSI_PROTOTYPES 1 not defined
|
|
|
|
CONST is also defined, but is obsolete. Just use const.
|
|
|
|
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'.
|
|
|
|
DEFUN_VOID (name)
|
|
|
|
Defines a function NAME, which takes no arguments.
|
|
|
|
obsolete -- EXFUN (name, (prototype)) -- obsolete.
|
|
|
|
Replaced by PARAMS. Do not use; will disappear someday soon.
|
|
Was used in external function declarations.
|
|
In ANSI C it is `NAME PROTOTYPE' (so PROTOTYPE should be enclosed in
|
|
parentheses). In traditional C it is `NAME()'.
|
|
For a function that takes no arguments, PROTOTYPE should be `(void)'.
|
|
|
|
PARAMS ((args))
|
|
|
|
We could use the EXFUN macro to handle prototype declarations, but
|
|
the name is misleading and the result is ugly. So we just define a
|
|
simple macro to handle the parameter lists, as in:
|
|
|
|
static int foo PARAMS ((int, char));
|
|
|
|
This produces: `static int foo();' or `static int foo (int, char);'
|
|
|
|
EXFUN would have done it like this:
|
|
|
|
static int EXFUN (foo, (int, char));
|
|
|
|
but the function is not external...and it's hard to visually parse
|
|
the function name out of the mess. EXFUN should be considered
|
|
obsolete; new code should be written to use PARAMS.
|
|
|
|
For example:
|
|
extern int printf PARAMS ((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. */
|
|
/* LINTLIBRARY */
|
|
|
|
|
|
#if defined (__STDC__) || defined (_AIX) || (defined (__mips) && defined (_SYSTYPE_SVR4)) || defined(WIN32)
|
|
/* All known AIX compilers implement these things (but don't always
|
|
define __STDC__). The RISC/OS MIPS compiler defines these things
|
|
in SVR4 mode, but does not define __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(void)
|
|
|
|
#define PROTO(type, name, arglist) type name arglist
|
|
#define PARAMS(paramlist) paramlist
|
|
#define ANSI_PROTOTYPES 1
|
|
|
|
#else /* Not ANSI C. */
|
|
|
|
#define PTR char *
|
|
#define PTRCONST PTR
|
|
#define LONG_DOUBLE double
|
|
|
|
#define AND ;
|
|
#define NOARGS
|
|
#define CONST
|
|
#ifndef const /* some systems define it in header files for non-ansi mode */
|
|
#define const
|
|
#endif
|
|
#define VOLATILE
|
|
#define SIGNED
|
|
#define DOTS
|
|
|
|
#define EXFUN(name, proto) name()
|
|
#define DEFUN(name, arglist, args) name arglist args;
|
|
#define DEFUN_VOID(name) name()
|
|
#define PROTO(type, name, arglist) type name ()
|
|
#define PARAMS(paramlist) ()
|
|
|
|
#endif /* ANSI C. */
|
|
|
|
#endif /* ansidecl.h */
|