os-ken/ryu/lib/dpid.py
Isaku Yamahata d347dce3c4 wsgi/routes: add regex pattern for each REST component
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
2012-11-03 15:57:05 +09:00

33 lines
1.0 KiB
Python

# Copyright (C) 2012 Nippon Telegraph and Telephone Corporation.
# Copyright (C) 2012 Isaku Yamahata <yamahata at private email ne jp>
#
# 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.
# Internal representation of datapath id is quad int
# string representation is in hex without '0x'
_DPID_LEN = 16
_DPID_LEN_STR = str(_DPID_LEN)
_DPID_FMT = '%0' + _DPID_LEN_STR + 'x'
DPID_PATTERN = r'[0-9a-f]{%d}' % _DPID_LEN
def dpid_to_str(dpid):
return _DPID_FMT % dpid
def str_to_dpid(dpid_str):
assert len(dpid_str) == _DPID_LEN
return int(dpid_str, 16)