covers.cc

发布/订阅系统中间件

// -*- C++ -*-
//
//  This file is part of Siena, a wide-area event notification system.
//  See http://www.cs.colorado.edu/serl/dot/siena.html
//
//  Author: Antonio Carzaniga <[e-mail]>
//  See the file AUTHORS for full details. 
//
//  Copyright (C) 1998-1999 University of Colorado
//
//  This program is free software; you can redistribute it and/or
//  modify it under the terms of the GNU General Public License
//  as published by the Free Software Foundation; either version 2
//  of the License, or (at your option) any later version.
//
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program; if not, write to the Free Software
//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307,
//  USA, or send email to [e-mail].
//
//
// $Id: covers.cc,v 1.2 2002/11/22 20:57:46 carzanig Exp $
//
#include <siena.h>

#include <string>
#include <iostream>
#include <sstream>
#include <exception>

using namespace std;

#include "CoveringRelations.h"

void print_usage(const char *programname) 
{
    cerr << "Usage: " << programname << " [options...]\n\
options:\n\t-f filters\n\t-o\n" << endl;
    exit(-1);
}

int main (int argc, char *argv[])
{
    bool quiet = true;
    Filter f1, f2;
    istream * is = &cin;

    for (int i=1; i< argc; i++) {		// parses command-line parameters
	if (strcmp(argv[i], "-f")==0) {
	    if (++i < argc) {
		is = new istringstream(argv[i]);
	    } else {
		print_usage(argv[0]);
	    }
	} else if (strcmp(argv[i], "-o")==0) {
	    quiet = false;
	} else {
	    print_usage(argv[0]);
	}
    }

    try {
	*is >> f1 >> f2;
	if (is != &cin) delete(is);
	if (covers(f1, f2)) {
	    if (!quiet)
		cout << "yes" << endl;
	    return 0;
	} else {
	    if (!quiet)
		cout << "no" << endl;
	    return 1;
	}
	return 0;
    } catch (exception &ex) {
	cerr << "error: " << ex.what() << endl;
	return 2;
    }
}