Add BOM to .h file

addbom.py

import os 
import os.path
import sys
import codecs

def main():
    print(sys.argv[1])
    for root, dirs, files in os.walk(sys.argv[1]):
        for file in files:
            if file.endswith('.h'):
                filename = os.path.join(root, file)
                with open(filename, 'rb+') as f:
                    content = f.read(3)
                    # print(content, ord(content))
                    if content != codecs.BOM_UTF8:
                        content += f.read()
                        f.seek(0)
                        f.write(codecs.BOM_UTF8)
                        f.write(content)
                        print(filename)

if __name__ == '__main__':
    main()