bcrypt.ctf/bcrypter/lib/format.py

from typing import Any
from bcrypt.lib.math import clamp_min

'''
Apply left padding to str(x) for parameter x: Any 
'''
def lpad(x: Any, n: int, pad: chr = ' ') -> str:
    x = str(x)
    width = clamp_min(n - len(x), 0)
    return width * pad + x

'''
Left pad an integer's binary representation with zeros 
'''
def lpadbin(x: int, n: int) -> str:
    return lpad(bin(x)[2:], n, pad='0')

'''
Extends the standard lstrip string method, 
allowing the max: int kwarg to be supplied.  
'''
def lstrip(s: str, prefix: str, max: int = -1) -> str:
    l = len(prefix)
    c = 0
    while s.startswith(prefix) and c < max: 
        s = s[l:]
        c += 1
    return s