Files
archived-xed/pysrc/tup2int.py
Mark Charney ffd94e705c initial commit
Change-Id: I32a6db1a17988d9df8ff69aa1672dbf08b108e8a
2016-12-16 16:09:38 -05:00

35 lines
1.1 KiB
Python

#!/usr/bin/env python
# -*- python -*-
#BEGIN_LEGAL
#
#Copyright (c) 2016 Intel Corporation
#
# 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.
#
#END_LEGAL
def tuple2int(t, cnames, op_widths_dict):
"""Convert list of values in the input parameter t to a hash key by
shifting and adding (OR'ing really) the values together. Must
factor in the max width of each field. The max width of each
component comes from the cnames and op_widths_dict parameters).
"""
res = 0
bit_shift = 0
for i,byte in enumerate(t):
opwidth = op_widths_dict[cnames[i]]
res += byte << bit_shift
bit_shift += opwidth
return res