package compilers;

/**
 *
 * @author ENGINEER
 */import java.io.*;
import java.util.Scanner;
public class lexical {
    public look_up_table lut=new look_up_table();
    public void insert_lut(String tok){
        if(is_rw(tok))
            lut.insert(tok, "rw");
    else    if(is_dig(tok))
            lut.insert(tok, "dig");
     else   if(is_id(tok))
            lut.insert(tok, "id");
     else
         System.out.println(tok+"error");



    }
    public void insert_ch(char ch){
        if(is_op(ch))
            lut.insert(String.valueOf(ch),"op");
      else   if(is_sp(ch))
            lut.insert(String.valueOf(ch),"sp");
      else
             System.out.println(ch+"error");
    }
    public void run(look_up_table lut1)throws Exception{
            String s,tok="";
            lut=lut1;
        int i;

        char ch;
        Scanner in=new Scanner(new File("D:\\aya.txt"));
        while(in.hasNext()){
            s=in.nextLine();

            for(i=0;i<s.length();i++){
                ch=s.charAt(i);
                if(ch!=' '){
                    if(is_sp(ch)||is_op(ch)){


                        insert_lut(tok);
                    tok="";


                    insert_ch(ch);
                        ch=' ';


                }
                   else tok+=ch;
                }
      else   if(!tok.equals("")) {


           insert_lut(tok);
          tok="";
            }
            }
            if(!tok.equals("")){

                insert_lut(tok);
                tok="";
            }
        }
        in.close();

        //}


    }
      public static boolean is_sp(char ch){
        if(ch==';'||ch==','||ch=='{'||ch=='}'||ch=='('||ch==')')
            return true;
        else
            return false;
    }
     public static boolean is_op(char ch){
         if(ch=='+'||ch=='*'||ch=='/'||ch=='='||ch=='-')
             return true;
         else
             return false;
     }

        public static boolean is_rw(String s1){
            if(s1.equals("byte")||s1.equals("int")||s1.equals("body")||s1.equals("print")||s1.equals("Def"))
                return true;
            else
                return false;
        }

          public static boolean is_dig(String s1){
              for(int i=0;i<s1.length();i++){
                  if(s1.charAt(i)>='0'&&s1.charAt(i)<='9')
                     continue;
                  else
                      return false;
              }
              return true;


}
         public static boolean is_id(String s1){
             if(s1.charAt(0)>='a'&&s1.charAt(0)<='z'||s1.charAt(0)>='A'&&s1.charAt(0)<='Z'){
                 for(int i=1;i<s1.length();i++){
                     if(s1.charAt(i)>='0'&&s1.charAt(i)<='9'||s1.charAt(0)>='a'&&s1.charAt(0)<='z'||s1.charAt(0)>='A'&&s1.charAt(0)<='Z')
                     continue;
                     else
                         return false;
                 }

             }
             else
             return false;

         return true;



         }
}