42 lines
1.4 KiB
C
42 lines
1.4 KiB
C
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// Part of dump1090, a Mode S message decoder for RTLSDR devices.
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//
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// icao_filter.c: prototypes for ICAO address hashtable
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//
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// Copyright (c) 2014,2015 Oliver Jowett <oliver@mutability.co.uk>
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//
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// This file is free software: you may copy, redistribute and/or modify it
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// under the terms of the GNU General Public License as published by the
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// Free Software Foundation, either version 2 of the License, or (at your
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// option) any later version.
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//
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// This file is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// 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
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#ifndef DUMP1090_ICAO_FILTER_H
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#define DUMP1090_ICAO_FILTER_H
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// Call once:
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void icaoFilterInit();
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// Add an address to the filter
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void icaoFilterAdd(uint32_t addr);
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// Test if the given address matches the filter
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int icaoFilterTest(uint32_t addr);
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// Test if the top 16 bits match any previously added address.
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// If they do, returns an arbitrary one of the matched
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// addresses. Returns 0 on failure.
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uint32_t icaoFilterTestFuzzy(uint32_t partial);
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// Call this periodically to allow the filter to expire
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// old entries.
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void icaoFilterExpire();
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#endif
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