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# Copyright (c) 2009, 2010, 2011, 2016 Nicira, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import re
import uuid
import ovs.db.parser
from ovs.db import error
uuidRE = re.compile("^xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx$"
.replace('x', '[0-9a-fA-F]'))
def zero():
return uuid.UUID(int=0)
def is_valid_string(s):
return uuidRE.match(s) is not None
def from_string(s):
if not is_valid_string(s):
raise error.Error("%s is not a valid UUID" % s)
return uuid.UUID(s)
def from_json(json, symtab=None):
try:
s = ovs.db.parser.unwrap_json(json, "uuid", (str,), "string")
if not uuidRE.match(s):
raise error.Error("\"%s\" is not a valid UUID" % s, json)
return uuid.UUID(s)
except error.Error as e:
if not symtab:
raise e
try:
name = ovs.db.parser.unwrap_json(json, "named-uuid",
(str,), "string")
except error.Error:
raise e
if name not in symtab:
symtab[name] = uuid.uuid4()
return symtab[name]
def to_json(uuid_):
return ["uuid", str(uuid_)]
def to_c_initializer(uuid_, var):
hex_string = uuid_.hex
parts = ["0x%s" % (hex_string[x * 8:(x + 1) * 8])
for x in range(4)]
return "{ %s }," % ", ".join(parts)