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From: ttobler@unislc.uucp (Trent Tobler)
Newsgroups: comp.lang.c
Subject: Re: strings & function addresses
Message-ID: <1990Oct26.211532.27626@unislc.uucp>
Date: 26 Oct 90 21:15:32 GMT
References: <3785@wb3ffv.ampr.org>
Organization: Unisys, SLC Utah
Lines: 58

From article <3785@wb3ffv.ampr.org>, by wmark@wb3ffv.ampr.org (Mark Winsor):
> 
>   I need to write a C front end for a cobol application. The cobol programs
> will return a string that is the name of the next program to call which is
> representing a C function. I need a way to associate that string with the 
> function address, anybody have any ideas? Please don't suggest I rewrite the
> application in C, time doesn't allow that option.
> 

I'm not sure I understand the question, but as I understand it, you require
a 'C' function to be associated with a string?  If you can get that to a 
'C' string, you can use either an array or linked list of structures with
a string and a function pointer.  Here is an examples, using arrays...

/*------------------------*/
f1()
{
  ...
}

f2()
{
  ...
}

f3()
{
  ...
}

struct func_s {
	char *name;
	int (*code)();
}
myfuncs[] = {
	{ "function1", f1},
	{ "function2", f2},
	{ "function3", f3}
};

/* then to find a call a function by string ... */
find( string)
	char *string;
{
	int i;

	for( i = 0; i < sizeof( myfuncs) / (sizeof( *myfuncd); i++)
		if( !strcmp( myfuncs[i].name, string)
			return (myfuncs[i].code)();
	/* string was not in list, print an error */
	return 0;
}



-------------------------------------------------------
       ___   ___
	Trent Tobler	ttobler@csulx.weber.edu		Internet