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Optimization: move RFC defined network constant construction out of 

the is_*() methods and into module private instances.
This commit is contained in:
Gregory P. Smith 2009-05-03 19:37:05 +00:00
parent 6493d788f0
commit 9ac3ee63f6
1 changed files with 33 additions and 14 deletions
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47
Lib/ipaddr.py
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@ -26,6 +26,7 @@ __version__ = '1.0.2'
import struct
class Error(Exception):
"""Base class for exceptions."""
@ -540,6 +541,7 @@ class IPv4(BaseIP):
# 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 @@ class IPv4(BaseIP):
"""
BaseIP.__init__(self)
self._version = 4
# Efficient constructor from integer.
if isinstance(ipaddr, int) or isinstance(ipaddr, long):
@ -711,9 +712,10 @@ class IPv4(BaseIP):
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 @@ class IPv4(BaseIP):
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 @@ class IPv4(BaseIP):
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 @@ class IPv4(BaseIP):
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 @@ class IPv6(BaseIP):
"""
_ALL_ONES = (2**128) - 1
_version = 6
def __init__(self, ipaddr):
"""Instantiate a new IPv6 object.
@ -900,7 +903,6 @@ class IPv6(BaseIP):
"""
BaseIP.__init__(self)
self._version = 6
# Efficient constructor from integer.
if isinstance(ipaddr, long) or isinstance(ipaddr, int):
@ -1032,7 +1034,7 @@ class IPv6(BaseIP):
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 @@ class IPv6(BaseIP):
RFC 2373 2.5.2.
"""
return self == IPv6('::')
return self == _IPV6_RFC2373_UNSPECIFIED
@property
def is_loopback(self):
@ -1054,7 +1056,7 @@ class IPv6(BaseIP):
RFC 2373 2.5.3.
"""
return self == IPv6('::1')
return self == _IPV6_RFC2373_LOOPBACK
@property
def is_link_local(self):
@ -1064,7 +1066,7 @@ class IPv6(BaseIP):
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 @@ class IPv6(BaseIP):
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 @@ class IPv6(BaseIP):
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 @@ class IPv6(BaseIP):
"""
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')