Serverside DIF Patcher with Source

Hey,

because my english isn't the best, I'm not going to write much :/

Code:

---

#include <iostream>
#include <fstream>
#include <cstdlib>
using namespace std;

char convertHexPair(char* hex) {
    int sixteensDig = (hex[0] - 48) * 16;
    int onesDig = hex[1];
    if ( (onesDig >= 97) && (onesDig <= 102) )
        onesDig -= 32;
    if (onesDig < 65) {
        return char(sixteensDig + onesDig - 48);
    } else {
        return char(sixteensDig + onesDig - 55);
    }
}

int Hex2Dec(const char *sz)
{
    int iResult;
    sscanf(sz, "%x", &iResult);
    return iResult;
}

int main(int argc, char *argv[])
{
    if(argc != 5)
    {
    cout << "Not enough arguments";
    return 1;
}
  char replace = convertHexPair(argv[4]);
  fstream out(argv[1], ios::in | ios::out | ios::binary);
  out.seekp(atoi(argv[2]), ios::beg);
  char original = out.peek();
  if(!out) {
    cout << "Cannot open file.";
    return 1;
  }
  out.close();
  fstream write(argv[1], ios::in | ios::out | ios::binary);
  write.seekp(atoi(argv[2]), ios::beg);
  write.put(convertHexPair(argv[4]));
  return 0;
}

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Put this code in a file with .cpp at the ending(for example main.cpp).
After this execute the following command

Code:

---

g++ main.cpp

---

replace main.cpp with your file!

After that you can patch a DIF file in your game, but I would recommend to use this script:

Code:

---

echo "Please enter the name of the Dif"
diffile = read
cat "difs/$diffile"|while read line; do
  cp game game.bak
  ./a.out $line | sed -e 's/://g'
done;

---

Put this script in a file named patch.sh

After that you can simply execute it via

Code:

---

./patch.sh

---

and than you have to enter the name of the Dif file!


If you get errors, put the main.cpp & patch.sh in the path where you game file is and run

Code:

---

g++ main.cpp

---

again!

MfG
TheMarv

Well, I would rather do this in your cpp file:

Code:

---

#include <iostream>
#include <fstream>
#include <cstdlib>
using namespace std;

char convertHexPair(char* hex)
{
        int sixteensDig = (hex[0] - 48) * 16;
        int onesDig = hex[1];
        if ( (onesDig >= 97) && (onesDig <= 102) )
        {
                onesDig -= 32;
        }
        if (onesDig < 65)
        {
                return char(sixteensDig + onesDig - 48);
        }
        else
        {
                return char(sixteensDig + onesDig - 55);
        }
}

int main(int argc, char *argv[])
{
        if(argc != 4)
        {
                cout << "Not enough arguments";
                return 1;
        }
       
        /*char replace = convertHexPair(argv[4]);
        fstream out(argv[1], ios::in | ios::out | ios::binary);
        out.seekp(atoi(argv[2]), ios::beg);
        char original = out.peek();
        if(!out) {
                cout << "Cannot open file.";
                return 1;
        }
        out.close();*/
        fstream write(argv[1], ios::in | ios::out | ios::binary);
        write.seekp(atoi(argv[2]), ios::beg);
        write.put(convertHexPair(argv[3]));
        return 0;
}

---

It's not really logic to check if the file is opened after you just used seekp.
Furthermore, you were waiting for 5 parameters, but you only have 4 parameters in your argc:
argc[0] = ./a.out
argc[1] = the file name
argc[2] = the position where we'll write the convertHexPair result
argc[3] = the argument of the convertHexPair function

So you just need 4 argc, and you should replace if(argc != 5) by "!= 4" and, indeed, "write.put(convertHexPair(argv[3]))" instead of "argv[4]".

I also checked your shell, and you should do this:

Code:

---

echo -n "Enter file name: "
read dif
cat "difs/$dif"|while read line; do
  cd "your/game/folder/"
  cp game game.bak
  cd "/your/a.out folder/"
  ./a.out $line | sed -e 's/://g'
done;

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Then, it should work correctly.