mirror of
https://github.com/google/pebble.git
synced 2025-07-04 22:00:38 -04:00
37 lines
1.1 KiB
Python
Executable file
37 lines
1.1 KiB
Python
Executable file
#!/usr/bin/env python
|
|
# Copyright 2024 Google LLC
|
|
#
|
|
# 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.
|
|
|
|
|
|
from __future__ import print_function
|
|
|
|
CRC_POLY = 0xEDB88320
|
|
|
|
|
|
def crc_table(bits):
|
|
lookup_table = []
|
|
for i in xrange(2**bits):
|
|
rr = i * 16
|
|
for x in xrange(8):
|
|
rr = (rr >> 1) ^ (-(rr & 1) & CRC_POLY)
|
|
lookup_table.append(rr & 0xffffffff)
|
|
return lookup_table
|
|
|
|
table = ['0x{:08x},'.format(entry) for entry in crc_table(4)]
|
|
chunks = zip(*[iter(table)]*4)
|
|
|
|
print('static const uint32_t s_lookup_table[] = {')
|
|
for chunk in chunks:
|
|
print(' ' + ' '.join(chunk))
|
|
print('};')
|