class cache_sim {

    private int cache_capacity;
    private int cache_blocksize;
    private int cache_associativity;
    
    public static void main(String[] args) {
	cache_sim c = new cache_sim();
	if(!c.parseParams(args)) {
	    return;
	}
	System.out.println("c is " + c.cache_capacity +
			   ", b is " + c.cache_blocksize + 
			   ", a is " + c.cache_associativity + "\n");
    }


    public boolean parseParams(String[] args)
    {
	//needed for the parsing of command line options
	int c;
	boolean c_flag, b_flag, a_flag;
	boolean errflg = false;
	
	c_flag = b_flag = a_flag = errflg = false;
	
	
	for(int i = 0; i < args.length; i++) {
	    c = args[i].charAt(1);
	    
	    switch (c) {
	    case 'c':
                cache_capacity = Integer.parseInt(args[i].substring(2, args[i].length()));
                c_flag = true;
                break;
	    case 'b':
                cache_blocksize = Integer.parseInt(args[i].substring(2, args[i].length()));
                b_flag = true;
                break;
	    case 'a':
                cache_associativity = Integer.parseInt(args[i].substring(2, args[i].length()));
                a_flag = true;
                break;
	    case ':':       /* -c without operand */
		System.err.println("Option -" + c + " requires an operand\n");
                errflg = true;
                break;
	    case '?':
		System.err.println("Unrecognized option: -" + c + "\n");
                errflg=true;
	    }
	}
	
	//check if we have all the options and have no illegal options
	if(errflg || !c_flag || !b_flag || !a_flag) {
	    System.err.println("usage: java Cache -c<capacity> -b<blocksize> -a<associativity>\n");
	    return false;
	}
	
	return true;
	
    }

}