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From: fcaggian@kepler.com (Frank Caggiano)
Newsgroups: comp.lang.eiffel
Subject: Re: formated string objects
Summary: use of MakeStr
Keywords: sprintf like routine
Message-ID: <461@kepler1.kepler.com>
Date: 7 Jan 91 18:36:41 GMT
References: <457@kepler1.kepler.com> <475@eiffel.UUCP>
Organization: Kepler Financial Mgmt., Setuket, NY
Lines: 40

In article <475@eiffel.UUCP>, marc@eiffel.UUCP (Jean-Marc Nerson) writes:
> 	Your contribution will be very helpful.
> 
> 	I slightly updated your C code to include:

> 		2) Use of specific Eiffel run-time routine MakeStr()
> 			instead of eif_create() and eif_rout()
> 
> 	The diff -c	follows.
	[ Number of lines deleted ]
[from]
> !     strobj = (OBJPTR) eif_create("string", 0)
> !     from_c = (ROUT_PTR) eif_rout(strobj, "from_c");
> !     (*from_c) (strobj, buf);
> !     return (strobj);
[to]
> ! 	 return (MakeStr (buf));
>   }

Does this mean that the return from MakeStr() is an Eiffel string 
object ?  It would be legal to do something like:

	OBJPTR s;
	ROUT_PTR r;

	s = MakeStr (buf);
	r = (ROUT_PTR) (s, "append");
	(*r)(s,s);

[ Doesn't really do anything, just illustrates my question ]

This is good to know as I do a lot of passing of string objects
back from C.  Thanks for the input.


-- 
Frank Caggiano                      INTERNET: fcaggian@kepler.com  
Kepler Financial Management, Ltd.       UUCP: ..!uunet!kepler1!fcaggian
100 North Country Rd.                    fax: (516) 751-8678
Sekauket, NY 11733                     voice: (516) 689-6300