Nothing appears to use these parity functions

This commit is contained in:
nzkarit 2017-09-08 21:33:46 +12:00
parent 8aec09148e
commit 0fbe579dfe

View File

@ -1,49 +0,0 @@
'''
Copyright 2015 Wolfgang Nagele
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.
'''
def bin2dec(buf):
if 0 == len(buf): # Crap input
return -1
return int(buf, 2)
# Ported from: http://www.radarspotters.eu/forum/index.php?topic=5617.msg41293#msg41293
def get_parity(msg, extended):
msg_length = len(msg)
payload = msg[:msg_length - 24]
parity = msg[msg_length - 24:]
data = bin2dec(payload[0:32])
if extended:
data1 = bin2dec(payload[32:64])
data2 = bin2dec(payload[64:]) << 8
hex_id = bin2dec(parity) << 8
for i in range(0, len(payload)):
if ((data & 0x80000000) != 0):
data ^= 0xFFFA0480
data <<= 1
if extended:
if ((data1 & 0x80000000) != 0):
data |= 1
data1 <<= 1
if ((data2 & 0x80000000) != 0):
data1 = data1 | 1
data2 <<= 1
return data
#return (data ^ hex_id) >> 8