Python Script for Strdef.bin editor

[aakarsh98 51]

import struct
import tkinter as tk
from tkinter import filedialog, messagebox, simpledialog, ttk

# Constants
NUM_STRINGS = 2000
CHARS_PER_STRING = 128

# Read the binary file and return list of strings
def read_strdef_bin(filepath):
    with open(filepath, 'rb') as f:
        data = f.read(NUM_STRINGS * CHARS_PER_STRING)
    strings = [data[i*CHARS_PER_STRING:(i+1)*CHARS_PER_STRING].decode('latin1').rstrip('\x00') for i in range(NUM_STRINGS)]
    return strings

# Write the list of strings back to binary format
def write_strdef_bin(filepath, strings):
    with open(filepath, 'wb') as f:
        for s in strings:
            encoded = s.encode('latin1')[:CHARS_PER_STRING]
            padded = encoded + b'\x00' * (CHARS_PER_STRING - len(encoded))
            f.write(padded)

# GUI application class
class StrDefEditorApp:
    def __init__(self, root):
        self.root = root
        self.root.title("STRDEF.BIN Editor")
        self.file_path = ""
        self.strings = []

        self.create_widgets()

    def create_widgets(self):
        frame = ttk.Frame(self.root)
        frame.pack(fill='both', expand=True)

        self.listbox = tk.Listbox(frame, font=('Courier', 10))
        self.listbox.pack(side='left', fill='both', expand=True)
        self.listbox.bind('<<ListboxSelect>>', self.edit_string)

        scrollbar = tk.Scrollbar(frame)
        scrollbar.pack(side='right', fill='y')
        self.listbox.config(yscrollcommand=scrollbar.set)
        scrollbar.config(command=self.listbox.yview)

        menubar = tk.Menu(self.root)
        filemenu = tk.Menu(menubar, tearoff=0)
        filemenu.add_command(label="Open", command=self.open_file)
        filemenu.add_command(label="Save", command=self.save_file)
        menubar.add_cascade(label="File", menu=filemenu)
        self.root.config(menu=menubar)

    def open_file(self):
        path = filedialog.askopenfilename(filetypes=[("BIN files", "*.bin")])
        if not path:
            return
        self.file_path = path
        self.strings = read_strdef_bin(path)
        self.listbox.delete(0, tk.END)
        for i, s in enumerate(self.strings):
            self.listbox.insert(tk.END, f"{i:04}: {s}")

    def save_file(self):
        if not self.file_path or not self.strings:
            return
        write_strdef_bin(self.file_path, self.strings)
        messagebox.showinfo("Saved", "Changes saved to file.")

    def edit_string(self, event):
        selection = self.listbox.curselection()
        if not selection:
            return
        index = selection[0]
        old_value = self.strings[index]
        new_value = simpledialog.askstring("Edit String", f"Edit string at index {index}:", initialvalue=old_value)
        if new_value is not None:
            self.strings[index] = new_value
            self.listbox.delete(index)
            self.listbox.insert(index, f"{index:04}: {new_value}")

# Run the app
def run_app():
    root = tk.Tk()
    app = StrDefEditorApp(root)
    root.mainloop()

run_app()

[bill3002 393]

If a file is larger than 256KB, do I need to change the number of strings and bytes?

[aakarsh98 51]

Not needed , you can try .