2 // simple.cxx -- a really simplistic class to manage airport ID,
3 // lat, lon of the center of one of it's runways, and
6 // Written by Curtis Olson, started April 1998.
8 // Copyright (C) 1998 Curtis L. Olson - curt@me.umn.edu
10 // This program is free software; you can redistribute it and/or
11 // modify it under the terms of the GNU General Public License as
12 // published by the Free Software Foundation; either version 2 of the
13 // License, or (at your option) any later version.
15 // This program is distributed in the hope that it will be useful, but
16 // WITHOUT ANY WARRANTY; without even the implied warranty of
17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 // General Public License for more details.
20 // You should have received a copy of the GNU General Public License
21 // along with this program; if not, write to the Free Software
22 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
32 #include <simgear/compiler.h>
34 #include <simgear/debug/logstream.hxx>
35 #include <simgear/misc/sgstream.hxx>
42 SG_USING_NAMESPACE(std);
43 SG_USING_STD(istream);
47 operator >> ( istream& in, FGAirport& a )
50 in >> junk >> a.id >> a.latitude >> a.longitude >> a.elevation
53 char name[256]; // should never be longer than this, right? :-)
54 in.getline( name, 256 );
60 // As a quick seed for the has_metar value, only airports with
61 // four-letter codes can have metar stations
62 a.has_metar = (isalpha(a.id[0]) && isalpha(a.id[1]) && isalpha(a.id[2])
63 && isalpha(a.id[3]) && !a.id[4]);
70 FGAirportList::FGAirportList( const string &airport_file,
71 const string &metar_file ) {
72 SG_LOG( SG_GENERAL, SG_INFO, "Reading simple airport list: "
75 // open the specified file for reading
76 sg_gzifstream apt_in( airport_file );
77 if ( !apt_in.is_open() ) {
78 SG_LOG( SG_GENERAL, SG_ALERT, "Cannot open file: " << airport_file );
88 airports_by_id[a.id] = a;
89 airports_array.push_back( &airports_by_id[a.id] );
93 SG_LOG( SG_GENERAL, SG_INFO, "Reading simple metar station list: "
96 // open the specified file for reading
97 sg_gzifstream metar_in( metar_file );
98 if ( !metar_in.is_open() ) {
99 SG_LOG( SG_GENERAL, SG_ALERT, "Cannot open file: " << metar_file );
105 if ( ident == "#" || ident == "//" ) {
108 airport_map_iterator apt = airports_by_id.find( ident );
109 if ( apt == airports_by_id.end() ) {
110 SG_LOG( SG_GENERAL, SG_DEBUG, "no apt = " << ident );
112 SG_LOG( SG_GENERAL, SG_DEBUG, "metar = " << ident );
113 airports_by_id[ident].has_metar = true;
120 // search for the specified id
121 FGAirport FGAirportList::search( const string& id) {
123 return airports_by_id[id];
127 // search for the airport nearest the specified position
128 FGAirport FGAirportList::search( double lon_deg, double lat_deg,
131 double min_dist = 360.0;
133 for ( i = 0; i < airports_array.size(); ++i ) {
134 // crude manhatten distance based on lat/lon difference
135 double d = fabs(lon_deg - airports_array[i]->longitude)
136 + fabs(lat_deg - airports_array[i]->latitude);
137 if ( d < min_dist ) {
138 if ( !with_metar || (with_metar && airports_array[i]->has_metar) ) {
145 return *airports_array[closest];
150 FGAirportList::~FGAirportList( void ) {
154 FGAirportList::size () const
156 return airports_array.size();
159 const FGAirport *FGAirportList::getAirport( int index ) const
161 return airports_array[index];
166 * Mark the specified airport record as not having metar
168 void FGAirportList::no_metar( const string &id ) {
169 airports_by_id[id].has_metar = false;