+ quoted_args = []
+ encoding = sys.getfilesystemencoding()
+ if encoding is None:
+ encoding = 'utf-8'
+ for a in args:
+ if isinstance(a, bytes):
+ # We may get a filename encoded with 'encodeFilename'
+ a = a.decode(encoding)
+ quoted_args.append(pipes.quote(a))
+ return u' '.join(quoted_args)
+
+
+def takewhile_inclusive(pred, seq):
+ """ Like itertools.takewhile, but include the latest evaluated element
+ (the first element so that Not pred(e)) """
+ for e in seq:
+ yield e
+ if not pred(e):
+ return
+
+
+def smuggle_url(url, data):
+ """ Pass additional data in a URL for internal use. """
+
+ sdata = compat_urllib_parse.urlencode(
+ {u'__youtubedl_smuggle': json.dumps(data)})
+ return url + u'#' + sdata
+
+
+def unsmuggle_url(smug_url):
+ if not '#__youtubedl_smuggle' in smug_url:
+ return smug_url, None
+ url, _, sdata = smug_url.rpartition(u'#')
+ jsond = compat_parse_qs(sdata)[u'__youtubedl_smuggle'][0]
+ data = json.loads(jsond)
+ return url, data
+
+
+def format_bytes(bytes):
+ if bytes is None:
+ return u'N/A'
+ if type(bytes) is str:
+ bytes = float(bytes)
+ if bytes == 0.0:
+ exponent = 0
+ else:
+ exponent = int(math.log(bytes, 1024.0))
+ suffix = [u'B', u'KiB', u'MiB', u'GiB', u'TiB', u'PiB', u'EiB', u'ZiB', u'YiB'][exponent]
+ converted = float(bytes) / float(1024 ** exponent)
+ return u'%.2f%s' % (converted, suffix)
+
+
+def str_to_int(int_str):
+ int_str = re.sub(r'[,\.]', u'', int_str)
+ return int(int_str)
+
+
+def get_term_width():
+ columns = os.environ.get('COLUMNS', None)
+ if columns:
+ return int(columns)
+
+ try:
+ sp = subprocess.Popen(
+ ['stty', 'size'],
+ stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+ out, err = sp.communicate()
+ return int(out.split()[1])
+ except:
+ pass
+ return None
+
+
+def month_by_name(name):
+ """ Return the number of a month by (locale-independently) English name """
+
+ ENGLISH_NAMES = [
+ u'January', u'February', u'March', u'April', u'May', u'June',
+ u'July', u'August', u'September', u'October', u'November', u'December']
+ try:
+ return ENGLISH_NAMES.index(name) + 1
+ except ValueError:
+ return None
+
+
+def fix_xml_all_ampersand(xml_str):
+ """Replace all the '&' by '&' in XML"""
+ return xml_str.replace(u'&', u'&')
+
+
+def setproctitle(title):
+ assert isinstance(title, type(u''))
+ try:
+ libc = ctypes.cdll.LoadLibrary("libc.so.6")
+ except OSError:
+ return
+ title = title
+ buf = ctypes.create_string_buffer(len(title) + 1)
+ buf.value = title.encode('utf-8')
+ try:
+ libc.prctl(15, ctypes.byref(buf), 0, 0, 0)
+ except AttributeError:
+ return # Strange libc, just skip this
+
+
+def remove_start(s, start):
+ if s.startswith(start):
+ return s[len(start):]
+ return s
+
+
+def url_basename(url):
+ path = compat_urlparse.urlparse(url).path
+ return path.strip(u'/').split(u'/')[-1]
+
+
+class HEADRequest(compat_urllib_request.Request):
+ def get_method(self):
+ return "HEAD"
+
+
+def int_or_none(v):
+ return v if v is None else int(v)
+
+
+def parse_duration(s):
+ if s is None:
+ return None
+
+ m = re.match(
+ r'(?:(?:(?P<hours>[0-9]+):)?(?P<mins>[0-9]+):)?(?P<secs>[0-9]+)$', s)
+ if not m:
+ return None
+ res = int(m.group('secs'))
+ if m.group('mins'):
+ res += int(m.group('mins')) * 60
+ if m.group('hours'):
+ res += int(m.group('hours')) * 60 * 60
+ return res
+
+
+def prepend_extension(filename, ext):
+ name, real_ext = os.path.splitext(filename)
+ return u'{0}.{1}{2}'.format(name, ext, real_ext)