irrXML Forum: Processing EXN_TEXT


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	Processing EXN_TEXT

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Willem Guest
Quote
2010-03-07 04:24:42

I am trying to get GPS data out of a GPX file:

The problem is the elevation <ele>value</ele>, which is EXN_TEXT. Here is a part of the .xml file:


<trkpt lat="-41.337876" lon="174.790258">
    <ele>102.04</ele>
    <time>2009-12-13T23:57:13Z</time>
    <extensions>
        <gpxtpx:TrackPointExtension>
            <gpxtpx:atemp>10.4</gpxtpx:atemp>
        </gpxtpx:TrackPointExtension>
    </extensions>
</trkpt>

Any ideas, this works, but is ugly:



    unsigned char processNext = 0;
    std::string lat, lon, ele;
    IrrXMLReader* xml = createIrrXMLReader("data/adelaide.gpx");

    while (xml && xml->read()) {
        std::string e = xml->getNodeName();

        if (!strcmp("ele", e.c_str())) {
            processNext++;
        }

        switch (xml->getNodeType()) {
            case EXN_NONE:
                break;
            case EXN_COMMENT:
                break;
            case EXN_ELEMENT_END:
                break;
            case EXN_UNKNOWN:
                break;
            case EXN_CDATA:
                break;
            case EXN_ELEMENT:
                if (!strcmp("trkpt", xml->getNodeName())) {
                    lat = xml->getAttributeValue("lat");
                    lon = xml->getAttributeValue("lon");
                    printf("%s,%s,", lat.c_str(), lon.c_str());
                }
                break;
            case EXN_TEXT:
                // The next element should be <ele>
                if (processNext == 1) {
                    ele = xml->getNodeData();
                    printf("%s\n", ele.c_str());
                } else if (processNext == 2) {
                    processNext = 0;
                }
                break;
        }
    }

    delete xml;

I would like to do something on the <ele>value</ele> node but don't know what else to do.

Any suggestions would be appreciated.

Thanks,
Willem

source code

Willem Guest
Quote
2010-03-07 04:34:26

Just to add to the above, the actual problem is that there are other EXN_TEXT nodes, such as <time>value</time> and I don't know how to tell the EXN_TEXT nodes apart, so I need something like the EXN_ELEMENT getNodeName() for the EXN_TEXT nodes. Is this possible?

Thanks
Willem

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