diff options
Diffstat (limited to 'Lib/ipaddress.py')
| -rw-r--r-- | Lib/ipaddress.py | 28 |
1 files changed, 7 insertions, 21 deletions
diff --git a/Lib/ipaddress.py b/Lib/ipaddress.py index 426ca53..b54e136 100644 --- a/Lib/ipaddress.py +++ b/Lib/ipaddress.py @@ -195,11 +195,7 @@ def _count_righthand_zero_bits(number, bits): """ if number == 0: return bits - for i in range(bits): - if (number >> i) & 1: - return i - # All bits of interest were zero, even if there are more in the number - return bits + return min(bits, (~number & (number-1)).bit_length()) def summarize_address_range(first, last): @@ -250,12 +246,11 @@ def summarize_address_range(first, last): while first_int <= last_int: nbits = min(_count_righthand_zero_bits(first_int, ip_bits), (last_int - first_int + 1).bit_length() - 1) - net = ip('%s/%d' % (first, ip_bits - nbits)) + net = ip((first_int, ip_bits - nbits)) yield net first_int += 1 << nbits if first_int - 1 == ip._ALL_ONES: break - first = first.__class__(first_int) def _collapse_addresses_recursive(addresses): @@ -949,20 +944,11 @@ class _BaseNetwork(_IPAddressBase): 'prefix length diff %d is invalid for netblock %s' % ( new_prefixlen, self)) - first = self.__class__('%s/%s' % - (self.network_address, - self._prefixlen + prefixlen_diff)) - - yield first - current = first - while True: - broadcast = current.broadcast_address - if broadcast == self.broadcast_address: - return - new_addr = self._address_class(int(broadcast) + 1) - current = self.__class__('%s/%s' % (new_addr, - new_prefixlen)) - + start = int(self.network_address) + end = int(self.broadcast_address) + step = (int(self.hostmask) + 1) >> prefixlen_diff + for new_addr in range(start, end, step): + current = self.__class__((new_addr, new_prefixlen)) yield current def supernet(self, prefixlen_diff=1, new_prefix=None): |