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89 lines
3.7 KiB
C++
89 lines
3.7 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2021 Jon Beniston, M7RCE <jon@beniston.com> //
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// //
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// Maidenhead locator utilities //
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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 as version 3 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 V3 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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///////////////////////////////////////////////////////////////////////////////////
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#include <cmath>
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#include <QRegularExpression>
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#include "maidenhead.h"
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// See: https://en.wikipedia.org/wiki/Maidenhead_Locator_System
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QString Maidenhead::toMaidenhead(float latitude, float longitude)
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{
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longitude += 180.0;
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latitude += 90.0;
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int lon1 = floor(longitude/20);
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longitude -= lon1*20;
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int lat1 = floor(latitude/10);
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latitude -= lat1*10;
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int lon2 = floor(longitude/2);
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longitude -= lon2*2;
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int lat2 = floor(latitude/1);
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latitude -= lat2;
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int lon3 = round(longitude*12);
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int lat3 = round(latitude*24);
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return QString("%1%2%3%4%5%6").arg(QChar(lon1+'A')).arg(QChar(lat1+'A'))
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.arg(QChar(lon2+'0')).arg(QChar(lat2+'0'))
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.arg(QChar(lon3+'A')).arg(QChar(lat3+'A'));
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}
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bool Maidenhead::fromMaidenhead(const QString& maidenhead, float& latitude, float& longitude)
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{
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if (Maidenhead::isMaidenhead(maidenhead))
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{
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int lon1 = maidenhead[0].toUpper().toLatin1() - 'A';
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int lat1 = maidenhead[1].toUpper().toLatin1() - 'A';
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int lon2 = maidenhead[2].toLatin1() - '0';
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int lat2 = maidenhead[3].toLatin1() - '0';
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int lon3 = 0;
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int lat3 = 0;
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int lon4 = 0;
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int lat4 = 0;
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if (maidenhead.length() >= 6)
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{
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lon3 = maidenhead[4].toUpper().toLatin1() - 'A';
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lat3 = maidenhead[5].toUpper().toLatin1() - 'A';
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}
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if (maidenhead.length() == 8)
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{
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lon4 = maidenhead[6].toLatin1() - '0';
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lat4 = maidenhead[7].toLatin1() - '0';
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}
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longitude = lon1 * 20 + lon2 * 2 + lon3 * 2.0/24.0 + lon4 * 2.0/24.0/10; // 20=360/18
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latitude = lat1 * 10 + lat2 * 1 + lat3 * 1.0/24.0 + lat4 * 1.0/24.0/10; // 10=180/18
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longitude -= 180.0;
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latitude -= 90.0;
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return true;
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}
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else
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return false;
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}
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bool Maidenhead::isMaidenhead(const QString& maidenhead)
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{
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int length = maidenhead.length();
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if ((length != 4) && (length != 6) && (length != 8))
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return false;
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QRegularExpression re(QRegularExpression::anchoredPattern("[A-Ra-r][A-Ra-r][0-9][0-9]([A-Xa-x][A-Xa-x]([0-9][0-9])?)?"));
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return re.match(maidenhead).hasMatch();
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}
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