37 lines
1.3 KiB
C++
37 lines
1.3 KiB
C++
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/*
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* fgcom - VoIP-Client for the FlightGear-Radio-Infrastructure
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (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, 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, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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*/
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#ifndef __POSITION_H__
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#define __POSITION_H__
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/* Compute distance between two points. */
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double distance (double lat1, double lon1, double lat2, double lon2);
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/* Build the phone number based on the ICAO code and airport frequency. */
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void icao2number (char *icao, float frequency, char *buf);
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void icao2atisnumber (char *icao, float frequency, char *buf);
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/* Search for the closest airport on selected frequency. */
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const char *
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icaobypos (struct airport *airports, double frequency, double plane_lat,
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double plane_lon, double range);
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#endif
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