Mercurial > cpython-lru_cache-weakref
diff Lib/ipaddr.py @ 53703:ae24de48adc4 legacy-trunk
Optimization: move RFC defined network constant construction out of
the is_*() methods and into module private instances.
| author | Gregory P. Smith <greg@mad-scientist.com> |
|---|---|
| date | Sun, 03 May 2009 19:37:05 +0000 |
| parents | d7b51ebf6de4 |
| children | 510ffc5db232 |
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line diff
--- a/Lib/ipaddr.py Sun May 03 18:42:15 2009 +0000 +++ b/Lib/ipaddr.py Sun May 03 19:37:05 2009 +0000 @@ -26,6 +26,7 @@ import struct + class Error(Exception): """Base class for exceptions.""" @@ -540,6 +541,7 @@ # Equivalent to 255.255.255.255 or 32 bits of 1's. _ALL_ONES = 0xffffffff + _version = 4 def __init__(self, ipaddr): """Instantiate a new IPv4 object. @@ -569,7 +571,6 @@ """ BaseIP.__init__(self) - self._version = 4 # Efficient constructor from integer. if isinstance(ipaddr, int) or isinstance(ipaddr, long): @@ -711,9 +712,10 @@ A boolean, True if the address is reserved per RFC 1918. """ - return (self in IPv4('10.0.0.0/8') or - self in IPv4('172.16.0.0/12') or - self in IPv4('192.168.0.0/16')) + for network in _IPV4_RFC1918_NETWORKS: + if self in network: + return True + return False @property def is_multicast(self): @@ -724,7 +726,7 @@ See RFC 3171 for details. """ - return self in IPv4('224.0.0.0/4') + return self in _IPV4_RFC3171_MULTICAST @property def is_loopback(self): @@ -734,7 +736,7 @@ A boolean, True if the address is a loopback per RFC 3330. """ - return self in IPv4('127.0.0.0/8') + return self in _IPV4_RFC3330_LOOPBACK @property def is_link_local(self): @@ -744,7 +746,7 @@ A boolean, True if the address is link-local per RFC 3927. """ - return self in IPv4('169.254.0.0/16') + return self in _IPV4_RFC3927_LINK_LOCAL @property def version(self): @@ -873,6 +875,7 @@ """ _ALL_ONES = (2**128) - 1 + _version = 6 def __init__(self, ipaddr): """Instantiate a new IPv6 object. @@ -900,7 +903,6 @@ """ BaseIP.__init__(self) - self._version = 6 # Efficient constructor from integer. if isinstance(ipaddr, long) or isinstance(ipaddr, int): @@ -1032,7 +1034,7 @@ See RFC 2373 2.7 for details. """ - return self in IPv6('ff00::/8') + return self in _IPV6_RFC2373_MULTICAST @property def is_unspecified(self): @@ -1043,7 +1045,7 @@ RFC 2373 2.5.2. """ - return self == IPv6('::') + return self == _IPV6_RFC2373_UNSPECIFIED @property def is_loopback(self): @@ -1054,7 +1056,7 @@ RFC 2373 2.5.3. """ - return self == IPv6('::1') + return self == _IPV6_RFC2373_LOOPBACK @property def is_link_local(self): @@ -1064,7 +1066,7 @@ A boolean, True if the address is reserved per RFC 4291. """ - return self in IPv6('fe80::/10') + return self in _IPV6_RFC4291_LINK_LOCAL @property def is_site_local(self): @@ -1078,7 +1080,7 @@ A boolean, True if the address is reserved per RFC 3513 2.5.6. """ - return self in IPv6('fec0::/10') + return self in _IPV6_RFC3513_SITE_LOCAL @property def is_private(self): @@ -1088,7 +1090,7 @@ A boolean, True if the address is reserved per RFC 4193. """ - return self in IPv6('fc00::/7') + return self in _IPV6_RFC4193_PRIVATE @property def version(self): @@ -1335,3 +1337,20 @@ """ return self.prefixlen + + +# IPv4 constants. +_IPV4_RFC1918_NETWORKS = (IPv4('10.0.0.0/8'), + IPv4('172.16.0.0/12'), + IPv4('192.168.0.0/16')) +_IPV4_RFC3171_MULTICAST = IPv4('224.0.0.0/4') +_IPV4_RFC3330_LOOPBACK = IPv4('127.0.0.0/8') +_IPV4_RFC3927_LINK_LOCAL = IPv4('169.254.0.0/16') + +# IPv6 constants. +_IPV6_RFC2373_MULTICAST = IPv6('ff00::/8') +_IPV6_RFC2373_UNSPECIFIED = IPv6('::') +_IPV6_RFC2373_LOOPBACK = IPv6('::1') +_IPV6_RFC4291_LINK_LOCAL = IPv6('fe80::/10') +_IPV6_RFC3513_SITE_LOCAL = IPv6('fec0::/10') # Deprecated by RFC3879. +_IPV6_RFC4193_PRIVATE = IPv6('fc00::/7')