U.h

#ifndef U_H
#define U_H
#include <bits/stdc++.h>
#include <string>
#include "R.h"
#include "I.h"
using namespace std;
string U(string s, int j, string Mnemonic)
{
    string ans = "";
    string rd = "";
    string imm = "";
    int flag = 0;
    // Extracting rd,imm fields
    if (Mnemonic == "auipc" || Mnemonic == "lui")
    {
        for (int i = j; i < s.size(); i++)
        {

            if (s[i] == 'x')
            {
                i++;
                if (flag == 0)
                {
                    while (s[i] != ',' && s[i] != ' ')
                    {
                        rd = rd + s[i];
                        i++;
                    }
                    flag++;
                }
            }
            if (flag == 1)
            {
                i++;
                while (s[i] == ' ')
                {
                    i++;
                }
                while (i != s.size() && s[i] != ' ')
                {
                    imm = imm + s[i];
                    i++;
                }
                flag = 0;
                break;
                // here the compiler terminates the line as soon as it gets the required values for instruction
            }
        }
    }

    // Adding opcode
    if (Mnemonic == "auipc")
        ans = ans + "0010111";
    else
        ans += "0110111";
    // Adding rd
    int rd_num = stoi(rd);
    if (rd_num > 31 || rd_num < 0)
    {
        printf("register not found");
        exit(0);
    }
    ans = dectobin(rd_num, 5, 1) + ans;
    // Adding immediate
    int imm_num = stoi(imm);
    ans = dectobin(imm_num, 20, 1) + ans;
    // converting binary to hexa
    string hex = bintodec(ans);
    // returning in hexadecimal
    return hex;
}
#endif