Func Protos with K&R Func Defs

[Richard A. O'Keefe]

In article <g8w5X2w163w at pondsquid.mv.com>, jdarnold at pondsquid.mv.com (Jonathan Arnold) writes:
> usenet at nlm.nih.gov (usenet news poster) writes:
[about a way of coding for both ANSI and Classic C, with examples]
> int tkline ARGLIST( ( bufP, tbufP, tokv, tokmax, vsepP, isepP ) )
> 	NFARG ( char *bufP )		/* Buffer ptr */
> 	NFARG ( AREG1 char *tbufP)	/* Token buffer pointer */
> 	NFARG ( AREG2 char **tokv)	/* Arg vectors */
> 	NFARG ( int tokmax)		/* Max # tokens */
> 	NFARG ( char *vsepP)		/* Visible separators */
> 	FARG ( char *isepP)		/* Invisible separators */
> It is kind of ugly, but it works and you get full function prototyping. 
> What does everyone out there think of this method?

That it is redundant when there is no need at all for redundancy.
All you have to do is take your ANSI C headers, stick a few more commas
in, and add an identifier:

#ifdef	__STDC__

#define	PROTO(x)	x

#define	A1(t1,v1) \
	(t1 v1)
#define A2(t1,v1,t2,v2) \
	(t1 v1, t2 v2)
#define A3(t1,v1,t2,v2,t3,v3) \
	(t1 v1, t2 v2, t3 v3)
#define A4(t1,v1,t2,v2,t3,v3,t4,v4) \
	(t1 v1, t2 v2, t3 v3, t4 v4)
#define A5(t1,v1,t2,v2,t3,v3,t4,v4,t5,v5) \
	(t1 v1, t2 v2, t3 v3, t4 v4, t5 v5)
#define A6(t1,v1,t2,v2,t3,v3,t4,v4,t5,v5,t6,v6) \
	(t1 v1, t2 v2, t3 v3, t4 v4, t5 v5, t6 v6)

#else

#define	PROTO(x)	()

#define	A1(t1,v1) \
	(v1) t1 v1;
#define A2(t1,v1,t2,v2) \
	(v1,v2) t1 v1; t2 v2;
#define A3(t1,v1,t2,v2,t3,v3) \
	(v1,v2,v3) t1 v1; t2 v2; t3 v3;
#define A4(t1,v1,t2,v2,t3,v3,t4,v4) \
	(v1,v2,v3,v4) t1 v1; t2 v2; t3 v3; t4 v4;
#define A5(t1,v1,t2,v2,t3,v3,t4,v4,t5,v5) \
	(v1,v2,v3,v4,v5) t1 v1; t2 v2; t3 v3; t4 v4; t5 v5;
#define A6(t1,v1,t2,v2,t3,v3,t4,v4,t5,v5,t6,v6) \
	(v1,v2,v3,v4,v5) t1 v1; t2 v2; t3 v3; t4 v4; t5 v5; t6 v6;

#endif

The example then becomes
    int tkline A6(
	char*,       bufP,		/* Buffer pointer */
	AREG1 char*, tbufP,		/* Token buffer pointer */
	AREG2 char**,tokv,		/* Arg vectors */
	int,         tokmax,		/* Max # of tokens */
	char*,       vsepP,		/* Visible separators */
	char*,       isepP)		/* Invisible separators */
	{ ... }

All done by kindness.
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