#! /usr/bin/env python3

"Replace LF with CRLF in argument files. Print names of changed files."

import sys, re, os

def main():
 for filename in sys.argv[1:]:
 if os.path.isdir(filename):
 print(filename, "Directory!")
 continue
 with open(filename, "rb") as f:
 data = f.read()
 if b'0円' in data:
 print(filename, "Binary!")
 continue
 newdata = re.sub(b"\r?\n", b"\r\n", data)
 if newdata != data:
 print(filename)
 with open(filename, "wb") as f:
 f.write(newdata)

if __name__ == '__main__':
 main()