Beispiel #1
0
        public double distance(Location loc)
        {
            double delta_lat, delta_lon;
            double temp;

            double lat1 = latitude;
            double lon1 = longitude;
            double lat2 = loc.latitude;
            double lon2 = loc.longitude;

            // convert degrees to radians
            lat1 *= RAD_CONVERT;
            lat2 *= RAD_CONVERT;

            // find the deltas
            delta_lat = lat2 - lat1;
            delta_lon = (lon2 - lon1) * RAD_CONVERT;

            // Find the great circle distance
            temp = Math.Pow(Math.Sin(delta_lat/2),2) + Math.Cos(lat1) * Math.Cos(lat2) * Math.Pow(Math.Sin(delta_lon/2),2);
            return EARTH_DIAMETER * Math.Atan2(Math.Sqrt(temp),Math.Sqrt(1-temp));
        }
        public Location getLocationV6(IPAddress addr)
        {
            int record_pointer;
            byte[] record_buf = new byte[FULL_RECORD_LENGTH];
            char[] record_buf2 = new char[FULL_RECORD_LENGTH];
            int record_buf_offset = 0;
            Location record = new Location();
            int str_length = 0;
            int j, Seek_country;
            double latitude = 0, longitude = 0;

            try {
            Seek_country = SeekCountryV6(addr);
            if (Seek_country == databaseSegments[0]) {
                return null;
            }
            record_pointer = Seek_country + ((2 * recordLength - 1) * databaseSegments[0]);
            if ((dboptions & GEOIP_MEMORY_CACHE) == 1){
              Array.Copy(dbbuffer, record_pointer, record_buf, 0, Math.Min(dbbuffer.Length - record_pointer, FULL_RECORD_LENGTH));
            } else {
              lock (ioLock ){
            file.Seek(record_pointer,SeekOrigin.Begin);
                file.Read(record_buf,0,FULL_RECORD_LENGTH);
              }
            }
            for (int a0 = 0;a0 < FULL_RECORD_LENGTH;a0++){
                record_buf2[a0] = Convert.ToChar(record_buf[a0]);
            }
            // get country
            record.countryCode = countryCode[unsignedByteToInt(record_buf[0])];
            record.countryName = countryName[unsignedByteToInt(record_buf[0])];
            record_buf_offset++;

            // get region
            while (record_buf[record_buf_offset + str_length] != '\0')
                str_length++;
            if (str_length > 0) {
                record.region = new String(record_buf2, record_buf_offset, str_length);
            }
            record_buf_offset += str_length + 1;
            str_length = 0;

            // get region_name
            record.regionName = RegionName.getRegionName( record.countryCode, record.region );

            // get city
            while (record_buf[record_buf_offset + str_length] != '\0')
                str_length++;
            if (str_length > 0) {
                record.city = new String(record_buf2, record_buf_offset, str_length);
            }
            record_buf_offset += (str_length + 1);
            str_length = 0;

            // get postal code
            while (record_buf[record_buf_offset + str_length] != '\0')
                str_length++;
               if (str_length > 0) {
                record.postalCode = new String(record_buf2, record_buf_offset, str_length);
            }
            record_buf_offset += (str_length + 1);

            // get latitude
            for (j = 0; j < 3; j++)
                latitude += (unsignedByteToInt(record_buf[record_buf_offset + j]) << (j * 8));
            record.latitude = (float) latitude/10000 - 180;
            record_buf_offset += 3;

            // get longitude
            for (j = 0; j < 3; j++)
                longitude += (unsignedByteToInt(record_buf[record_buf_offset + j]) << (j * 8));
                record.longitude = (float) longitude/10000 - 180;

            record.metro_code = record.dma_code = 0;
            record.area_code = 0;
            if (databaseType == DatabaseInfo.CITY_EDITION_REV1
              ||databaseType == DatabaseInfo.CITY_EDITION_REV1_V6) {
                // get metro_code
                int metroarea_combo = 0;
                if (record.countryCode == "US"){
                   record_buf_offset += 3;
                    for (j = 0; j < 3; j++)
                        metroarea_combo += (unsignedByteToInt(record_buf[record_buf_offset + j]) << (j * 8));
                    record.metro_code = record.dma_code = metroarea_combo/1000;
                    record.area_code = metroarea_combo % 1000;
                }
            }
            }
            catch (IOException) {
            Console.Write("IO Exception while seting up segments");
            }
            return record;
        }