#!/usr/bin/python3
import sys
from getopt import getopt

bom_str = b'\xEF\xBB\xBF'

delete = False
opts, args = getopt(sys.argv[1:],":d",[])
for o,a in opts:
    if o == "-d":
        delete = True

def bom(fn):
    with open(fn,"rb") as fd:
        c = fd.read()
    if delete:
        if c[0:3] == bom_str:
            with open(fn,"wb") as fd:
                fd.write(c[3:])
    else:
        if c[0:3] != bom_str:
            with open(fn,"wb") as fd:
                fd.write(bom_str)
                fd.write(c)

for a in args:
    bom(a)