bsdiff4

import bsdiff4 import os # Example with bytes old_data = b"This is the old data string." new_data = b"This is the new and updated data string." # Generate a binary diff diff_data = bsdiff4.diff(old_data, new_data) print(f"Diff data length: {len(diff_data)} bytes") # Apply the patch to get back the new data patched_data = bsdiff4.patch(old_data, diff_data) assert patched_data == new_data print(f"Patched data (bytes): {patched_data.decode('utf-8')}\n") # Example with files file_old = 'old_file.txt' file_new = 'new_file.txt' file_diff = 'diff.bin' file_patched = 'patched_file.txt' with open(file_old, 'wb') as f: f.write(old_data) with open(file_new, 'wb') as f: f.write(new_data) # Generate diff between files bsdiff4.file_diff(file_old, file_new, file_diff) print(f"File diff created: {file_diff}") # Apply patch to recreate new file bsdiff4.file_patch(file_old, file_patched, file_diff) with open(file_patched, 'rb') as f: recreated_data = f.read() assert recreated_data == new_data print(f"Patched file created: {file_patched} (content matches new_file.txt)") # Clean up generated files os.remove(file_old) os.remove(file_new) os.remove(file_diff) os.remove(file_patched)