1 # Copyright (c) 2009, 2010, 2011 Nicira, Inc.
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 six.moves import range
20 from ovs.db import error
23 uuidRE = re.compile("^xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx$"
24 .replace('x', '[0-9a-fA-F]'))
28 return uuid.UUID(int=0)
31 def is_valid_string(s):
32 return uuidRE.match(s) is not None
36 if not is_valid_string(s):
37 raise error.Error("%s is not a valid UUID" % s)
41 def from_json(json, symtab=None):
43 s = ovs.db.parser.unwrap_json(json, "uuid", [str, unicode], "string")
44 if not uuidRE.match(s):
45 raise error.Error("\"%s\" is not a valid UUID" % s, json)
47 except error.Error as e:
51 name = ovs.db.parser.unwrap_json(json, "named-uuid",
52 [str, unicode], "string")
56 if name not in symtab:
57 symtab[name] = uuid.uuid4()
62 return ["uuid", str(uuid_)]
65 def to_c_assignment(uuid_, var):
66 """Returns an array of strings, each of which contain a C statement. The
67 statements assign 'uuid_' to a "struct uuid" as defined in Open vSwitch
70 hex_string = uuid_.hex
71 return ["%s.parts[%d] = 0x%s;" % (var, x, hex_string[x * 8:(x + 1) * 8])