Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!asuvax!ncar!news.miami.edu!umiami!bxpfac
From: bxpfac@umiami.ir.miami.edu
Newsgroups: comp.lang.c
Subject: Is this bsearch call portable?
Message-ID: <1991Apr10.094540.8841@umiami.ir.miami.edu>
Date: 10 Apr 91 13:45:40 GMT
Reply-To: devebw9f@miavax.ir.miami.edu
Organization: Univ of Miami IR
Lines: 37

Is the following call to bsearch portable?  Note that 's' is the
key to be searched and is a pointer to 'char' whereas 'fun' is an 
array of 'FUN'. Also note that the function 'funcmp' uses only the 
string 'fun_name' for comparison. 

(I have not used casts in call to bsearch since I am using prototypes).

----------------------
char s[] = "fun2";

     pfun = (FUN *) bsearch (&s, fun, nfun, sizeof (FUN), funcmp);
----------------------

DECLARATIONS of variables used above.

typedef struct {
  char *fun_name;
  double (*fun_ptr) (double);
} FUN;

FUN  fun[] = {{"fun1",     fun1},
              {"fun2",     fun2},
};

int  nfun = sizeof (fun) / sizeof (FUN);
FUN  *pfun;

/*===========================================================================*/

int   funcmp (void *p1, void *p2)
{
	return (strcmp (((FUN *) p1)->fun_name, ((FUN *) p2)->fun_name));
}

Thanks.

Bimal / devebw9f@miavax.ir.miami.edu