|  | /* 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|  | CONST is also defined, but is obsolete.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	*/ |