1 # Copyright (c) 2009, 2010, 2011 Nicira Networks
3 # Licensed under the Apache License, Version 2.0 (the "License");
4 # you may not use this file except in compliance with the License.
5 # You may obtain a copy of the License at:
7 # http://www.apache.org/licenses/LICENSE-2.0
9 # Unless required by applicable law or agreed to in writing, software
10 # distributed under the License is distributed on an "AS IS" BASIS,
11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 # See the License for the specific language governing permissions and
13 # limitations under the License.
18 from ovs.db import error
21 uuidRE = re.compile("^xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx$"
22 .replace('x', '[0-9a-fA-F]'))
25 return uuid.UUID(int=0)
28 def is_valid_string(s):
29 return uuidRE.match(s) is not None
33 if not is_valid_string(s):
34 raise error.Error("%s is not a valid UUID" % s)
38 def from_json(json, symtab=None):
40 s = ovs.db.parser.unwrap_json(json, "uuid", unicode)
41 if not uuidRE.match(s):
42 raise error.Error("\"%s\" is not a valid UUID" % s, json)
44 except error.Error, e:
48 name = ovs.db.parser.unwrap_json(json, "named-uuid", unicode)
52 if name not in symtab:
53 symtab[name] = uuid4()
58 return ["uuid", str(uuid_)]
61 def to_c_assignment(uuid_, var):
62 """Returns an array of strings, each of which contain a C statement. The
63 statements assign 'uuid_' to a "struct uuid" as defined in Open vSwitch
66 hex_string = uuid_.hex
67 return ["%s.parts[%d] = 0x%s;" % (var, x, hex_string[x * 8:(x + 1) * 8])