/**
 * Change.java
 **/

import java.io.*;

public class Change{
    public static String Change_theURL(String URL) throws Exception{
	StringBuffer URL1 = new StringBuffer(URL);
	int sla_index = URL.indexOf("/",7);
	int last_sla = URL.lastIndexOf("/");

	if(sla_index == -1){// "/"が全くない場合
	    URL1.append("/");
	}else{//<http://○/〜 の場合
	    int dot_index =  URL.indexOf(".",last_sla+1);
	    if(dot_index != -1)//�@<http://○/〜.html> の場合
		URL1.delete(last_sla+1,URL.length());//<http://○/>
	    else{              //�A<http://○/○> の場合
		int len = URL.length();
		String end = URL.substring(len-1);
		    if(!end.equals("/"))
			URL1.append("/")
	    }
	}
	String URL2 = new String(URL1);
	URL = URL2;
	return URL;
    }

    // <a href="./〜">,<a href="../〜">,<a href="/〜">の場合
    public static String cd_theURL(String URL, int cd, int home) throws Exception{
	String URL0 =  URL;
	StringBuffer URL1 = new StringBuffer(URL);

	while(cd > 0){
	    int len = URL0.length();
	    URL1.delete(len-1,len);
	    URL0 = new String(URL1);

	    int last_sla = URL0.lastIndexOf("/");
	    int len1 = URL0.length();
	    URL1.delete(last_sla+1,len1);
	    URL0 = new String(URL1);
	    cd --;
	    URL = URL0;
	}

	if(home==1){
	    int last_sla = URL0.indexOf("/",7);
	    int len = URL0.length();
	    URL1.delete(last_sla+1,len);
	    URL0 = new String(URL1);
	    URL = URL0;
	}
	return URL;
    }

}