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9c70261c0e
No point in slurping in all of dive.h for translation units that only want to do some time manipulation without ever touching a dive. Don't call the header "time.h", because we don't want to end up in a confusion with the system header of the same name. Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
88 lines
3.3 KiB
C++
88 lines
3.3 KiB
C++
// SPDX-License-Identifier: GPL-2.0
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#include "core/parse-gpx.h"
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#include "core/subsurface-time.h"
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#include <QFile>
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#include <QXmlStreamReader>
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// Find the coordinates at the time specified in coords.start_dive
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// by searching the gpx file "fileName". Here is a typical trkpt element in GPX:
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// <trkpt lat="-26.84" lon="32.88"><ele>-53.7</ele><time>2017-08-06T04:56:42Z</time></trkpt>
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int getCoordsFromGPXFile(struct dive_coords *coords, QString fileName)
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{
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struct tm tm1;
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time_t trkpt_time = 0;
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time_t divetime;
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int64_t time_offset = coords->settingsDiff_offset + coords->timeZone_offset;
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double lon = 0, lat = 0;
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int line = 0;
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bool first_line = true;
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bool found = false;
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bool trkpt_found = false;
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divetime = coords->start_dive;
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QFile gpxFile;
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gpxFile.setFileName(fileName);
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if (!gpxFile.open(QIODevice::ReadOnly | QIODevice::Text)) {
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QByteArray local8bitBAString1 = fileName.toLocal8Bit();
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char *fname = local8bitBAString1.data(); // convert QString to a C string fileName
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fprintf(stderr, "GPS file open error: file name = %s\n", fname);
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return 1;
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}
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#ifdef GPSDEBUG
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struct tm time; // decode the time of start of dive:
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utc_mkdate(divetime, &time);
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int dyr,dmon,dday,dhr,dmin;
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dyr = time.tm_year;
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dmon = time.tm_mon;
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dday = time.tm_mday;
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dhr = time.tm_hour;
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dmin = time.tm_min;
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#endif
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QXmlStreamReader gpxReader(&gpxFile);
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while (!gpxReader.atEnd()) {
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gpxReader.readNext();
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if (gpxReader.isStartElement()) {
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if (gpxReader.name() == "trkpt") {
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trkpt_found = true;
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line++;
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foreach (const QXmlStreamAttribute &attr, gpxReader.attributes()) {
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if (attr.name().toString() == QLatin1String("lat"))
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lat = attr.value().toString().toDouble();
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else if (attr.name().toString() == QLatin1String("lon"))
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lon = attr.value().toString().toDouble();
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}
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}
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if (gpxReader.name() == "time" && trkpt_found) { // Ignore the <time> element in the GPX file header
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QString dateTimeString = gpxReader.readElementText();
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bool ok;
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tm1.tm_year = dateTimeString.left(4).toInt(&ok, 10); // Extract the date/time components:
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tm1.tm_mon = dateTimeString.mid(5,2).toInt(&ok,10) - 1;
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tm1.tm_mday = dateTimeString.mid(8,2).toInt(&ok,10);
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tm1.tm_hour = dateTimeString.mid(11,2).toInt(&ok,10);
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tm1.tm_min = dateTimeString.mid(14,2).toInt(&ok,10);
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tm1.tm_sec = dateTimeString.mid(17,2).toInt(&ok,10);
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trkpt_time = utc_mktime(&tm1) + time_offset;
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if (first_line) {
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first_line = false;
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coords->start_track = trkpt_time; // Local time of start of GPS track
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}
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if (trkpt_time >= divetime && found == false) { // This GPS local time corresponds to the start time of the dive
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coords->lon = lon; // save the coordinates
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coords->lat = lat;
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found = true;
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}
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#ifdef GPSDEBUG
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utc_mkdate(trkpt_time, &time); // print coordinates and time of each trkpt element of the GPX file as well as dive start time
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fprintf(stderr, " %02d: lat=%f lon=%f timestamp=%ld (%ld) %02d/%02d/%02d %02d:%02d dt=%ld %02d/%02d/%02d %02d:%02d\n", line, lat,
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lon, trkpt_time, time_offset, time.tm_year, time.tm_mon+1, time.tm_mday, time.tm_hour, time.tm_min, divetime, dyr, dmon+1, dday,dhr, dmin);
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#endif
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}
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}
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} // while !at.End() // This loop executes until EOF causes a break out of the loop
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coords->end_track = trkpt_time; // This is the local time of the end of the GPS track
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gpxFile.close();
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return 0;
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}
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