s4-python: Move dnspython to lib/, like the other Python modules

[samba.git] / lib / dnspython / dns / rdtypes / nsbase.py

diff --git a/lib/dnspython/dns/rdtypes/nsbase.py b/lib/dnspython/dns/rdtypes/nsbase.py
new file mode 100644 (file)
index 0000000..7cdb2a0
--- /dev/null
+++ b/lib/dnspython/dns/rdtypes/nsbase.py
@@ -0,0 +1,82 @@
+# Copyright (C) 2003-2007, 2009, 2010 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""NS-like base classes."""
+
+import cStringIO
+
+import dns.exception
+import dns.rdata
+import dns.name
+
+class NSBase(dns.rdata.Rdata):
+    """Base class for rdata that is like an NS record.
+
+    @ivar target: the target name of the rdata
+    @type target: dns.name.Name object"""
+
+    __slots__ = ['target']
+
+    def __init__(self, rdclass, rdtype, target):
+        super(NSBase, self).__init__(rdclass, rdtype)
+        self.target = target
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        target = self.target.choose_relativity(origin, relativize)
+        return str(target)
+
+    def from_text(cls, rdclass, rdtype, tok, origin = None, relativize = True):
+        target = tok.get_name()
+        target = target.choose_relativity(origin, relativize)
+        tok.get_eol()
+        return cls(rdclass, rdtype, target)
+
+    from_text = classmethod(from_text)
+
+    def to_wire(self, file, compress = None, origin = None):
+        self.target.to_wire(file, compress, origin)
+
+    def to_digestable(self, origin = None):
+        return self.target.to_digestable(origin)
+
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin = None):
+        (target, cused) = dns.name.from_wire(wire[: current + rdlen],
+                                             current)
+        if cused != rdlen:
+            raise dns.exception.FormError
+        if not origin is None:
+            target = target.relativize(origin)
+        return cls(rdclass, rdtype, target)
+
+    from_wire = classmethod(from_wire)
+
+    def choose_relativity(self, origin = None, relativize = True):
+        self.target = self.target.choose_relativity(origin, relativize)
+
+    def _cmp(self, other):
+        return cmp(self.target, other.target)
+
+class UncompressedNS(NSBase):
+    """Base class for rdata that is like an NS record, but whose name
+    is not compressed when convert to DNS wire format, and whose
+    digestable form is not downcased."""
+
+    def to_wire(self, file, compress = None, origin = None):
+        super(UncompressedNS, self).to_wire(file, None, origin)
+
+    def to_digestable(self, origin = None):
+        f = cStringIO.StringIO()
+        self.to_wire(f, None, origin)
+        return f.getvalue()