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35 lines
1.1 KiB
Python
35 lines
1.1 KiB
Python
#!/usr/bin/env python
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# -*- python -*-
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#BEGIN_LEGAL
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#
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#Copyright (c) 2016 Intel Corporation
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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#END_LEGAL
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def tuple2int(t, cnames, op_widths_dict):
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"""Convert list of values in the input parameter t to a hash key by
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shifting and adding (OR'ing really) the values together. Must
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factor in the max width of each field. The max width of each
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component comes from the cnames and op_widths_dict parameters).
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"""
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res = 0
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bit_shift = 0
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for i,byte in enumerate(t):
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opwidth = op_widths_dict[cnames[i]]
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res += byte << bit_shift
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bit_shift += opwidth
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return res
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