/*
 * Copyright (c) 1991, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)cdefs.h	8.2 (Berkeley) 10/04/93
 */

#ifndef	_CDEFS_H_
#define	_CDEFS_H_

#if defined(__cplusplus)
#define	__BEGIN_DECLS	extern "C" {
#define	__END_DECLS	};
#else
#define	__BEGIN_DECLS
#define	__END_DECLS
#endif

/*
 * The __CONCAT macro is used to concatenate parts of symbol names, e.g.
 * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
 * The __CONCAT macro is a bit tricky -- make sure you don't put spaces
 * in between its arguments.  __CONCAT can also concatenate double-quoted
 * strings produced by the __STRING macro, but this only works with ANSI C.
 */
#if defined(__STDC__) || defined(__cplusplus)
#define	__P(protos)	protos		/* full-blown ANSI C */
#define	__CONCAT(x,y)	x ## y
#define	__STRING(x)	#x

#if !defined(__GNUC__) && !defined(__cplusplus)
#define	inline
#endif

#else	/* !(__STDC__ || __cplusplus) */
#define	__P(protos)	()		/* traditional C preprocessor */
#define	__CONCAT(x,y)	x/**/y
#define	__STRING(x)	"x"

#ifdef __GNUC__
#define	const		__const		/* GCC: ANSI C with -traditional */
#define	inline		__inline
#define	signed		__signed
#define	volatile	__volatile

#else	/* !__GNUC__ */
#define	const				/* delete ANSI C keywords */
#define	inline
#define	signed
#define	volatile
#endif	/* !__GNUC__ */
#endif	/* !(__STDC__ || __cplusplus) */

/*
 * GCC has extensions for declaring functions as `pure' (always returns
 * the same value given the same inputs, i.e., has no external state and
 * no side effects) and `dead' (nonreturning).  These mainly affect
 * optimization and warnings.  Unfortunately, GCC complains if these are
 * used under strict ANSI mode (`gcc -ansi -pedantic'), hence we need to
 * define them only if compiling without this.
 */
#if defined(__GNUC__) && !defined(__STRICT_ANSI__)
#define __dead __volatile
#define __pure __const
#else
#define __dead
#define __pure
#endif

#endif /* !_CDEFS_H_ */