Helper to get all the strings from fuzzdb

def _fuzzdb_get_strings(max_len=0):
    'Helper to get all the strings from fuzzdb'

    ignored = ['integer-overflow']

    for subdir in pkg_resources.resource_listdir('protofuzz', BASE_PATH):
        if subdir in ignored:
            continue

        path = '{}/{}'.format(BASE_PATH, subdir)
        listing = pkg_resources.resource_listdir('protofuzz', path)
        for filename in listing:
            if not filename.endswith('.txt'):
                continue

            path = '{}/{}/{}'.format(BASE_PATH, subdir, filename)
            source = _open_fuzzdb_file(path)
            for line in source:
                string = line.decode('utf-8').strip()
                if not string or string.startswith('#'):
                    continue
                if max_len != 0 and len(line) > max_len:
                    continue

                yield string