32 lines
1.2 KiB
Python
32 lines
1.2 KiB
Python
# Copyright 2018 Espressif Systems (Shanghai) PTE LTD
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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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# Convenience functions for commonly used data type conversions
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def str_to_hexstr(string):
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# Form hexstr by appending ASCII codes (in hex) corresponding to
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# each character in the input string
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return ''.join('{:02x}'.format(ord(c)) for c in string)
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def hexstr_to_str(hexstr):
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# Prepend 0 (if needed) to make the hexstr length an even number
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if len(hexstr) % 2 == 1:
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hexstr = '0' + hexstr
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# Interpret consecutive pairs of hex characters as 8 bit ASCII codes
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# and append characters corresponding to each code to form the string
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return ''.join(chr(int(hexstr[2 * i: 2 * i + 2], 16)) for i in range(len(hexstr) // 2))
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