BCD utils

gistfile1.py

def bcd_to_int(bcd_int):
    '''Convert a BCD integer to a base-10 integer.'''

    bcd_str = bin(bcd_int)[2:][::-1]
    num_groups = ((len(bcd_str) - 1) / 4) + 1
    total = 0

    for i in range(num_groups):
        digit = bcd_str[(4 * i):(4 * (i + 1))][::-1]
        total += int(digit, 2) * (10 ** i)
    return total


def int_to_bcd(dec_val):
    '''Convert a base-10 integer to a BCD integer.'''

    dec_val = str(dec_val)
    bin_str = ''

    for digit in dec_val:
        bin_digit = bin(int(digit))[2:]
        bin_str = bin_str + '0' * (4 - len(bin_digit)) + bin_digit 

    return int(bin_str, 2)