Decode the position of Waystone (of Waystone mod)

decode_waystone_position.py

import argparse


def sign_extend(value: int, bits: int) -> int:
    """ Perform sign extension operation.
    """
    sign_bit = 1 << (bits - 1)
    mask = sign_bit - 1
    return (value & mask) - (value & sign_bit)
    
    
def decode_waystone(x):
    """ x, y, z """
    return sign_extend(x >> 38, 25), sign_extend(x >> 26, 12), sign_extend(x, 25)
    
    
def __main__():
    # 1. (for server) look for uuid given username in usernamecache.json
    # 2. open the player's playerdata with nbt viewer
    # 3. find tag with given name by digging down through ForgeData tag
    # 4. copy the value of position and decode with this script
    parser = argparse.ArgumentParser(description='Unpack Waystone position.')
    parser.add_argument('x', metavar='position', type=int, help='position')
    args = parser.parse_args()
    print(decode_waystone(args.x))
    
    
if __name__ == '__main__':
    __main__()