usage: find_unicode_control.py [-h] [-p {all,bidi}] [-v] [-c CONFIG] path [path ...]

Look for Unicode control characters

positional arguments:
  path                  Sources to analyze

optional arguments:
  -h, --help            show this help message and exit
  -p {all,bidi}, --nonprint {all,bidi}
                        Look for either all non-printable unicode characters or bidirectional control characters.
  -v, --verbose         Verbose mode.
  -d, --detailed        Print line numbers where characters occur.
  -t, --notests         Exclude tests (basically test.* as a component of path).
  -c CONFIG, --config CONFIG
                        Configuration file to read settings from.

$ python3 find_unicode_control.py -p bidi *.c
commenting-out.c: bidirectional control characters: {'\u202e', '\u2066', '\u2069'}
early-return.c: bidirectional control characters: {'\u2067'}
stretched-string.c: bidirectional control characters: {'\u202e', '\u2066', '\u2069'}

find_unicode_control.py -p bidi -d .
./commenting-out.c:4 bidirectional control characters: ['\u202e', '\u2066', '\u2069', '\u2066']
./commenting-out.c:6 bidirectional control characters: ['\u202e', '\u2066']
./early-return.c:4 bidirectional control characters: ['\u2067']
./stretched-string.c:6 bidirectional control characters: ['\u202e', '\u2066', '\u2069', '\u2066']

scan_exclude = [
        # Iconv test data
        r'/iconvdata/testdata/',
        # Test case data
        r'libio/tst-widetext.input$',
        # Test script.  This is to silence the warning:
        # 'utf-8' codec can't decode byte 0xe9 in position 2118: invalid continuation byte
        # since the script tests mixed encoding characters.
        r'localedata/tst-langinfo.sh$']