35 lines
1.1 KiB
Python
35 lines
1.1 KiB
Python
# aprslib - Python library for working with APRS
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# Copyright (C) 2013-2014 Rossen Georgiev
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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"""
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Contains a function for generating passcode from callsign
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"""
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def passcode(callsign):
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"""
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Takes a CALLSIGN and returns passcode
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"""
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assert isinstance(callsign, str)
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callsign = callsign.split('-')[0].upper()
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code = 0x73e2
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for i, char in enumerate(callsign):
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code ^= ord(char) << (8 if not i % 2 else 0)
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return code & 0x7fff
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