/usr/include/kml/convenience/gpx_trk_pt_handler.h is in libkml-dev 1.3.0-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
// 3. Neither the name of Google Inc. nor the names of its contributors may be
// used to endorse or promote products derived from this software without
// specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
// EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// This file contains the declaration of the GpxTrkPtHandler class.
#ifndef KML_CONVENIENCE_GPX_TRK_PT_HANDLER_H__
#define KML_CONVENIENCE_GPX_TRK_PT_HANDLER_H__
#include <cstring> // strcmp
#include "boost/scoped_ptr.hpp"
#include "kml/base/attributes.h"
#include "kml/base/expat_handler.h"
#include "kml/base/vec3.h"
namespace kmlconvenience {
// Find all <trkpt>'s in the GPX file.
// For example:
// <trkpt lat="-33.911973070" lon="18.422974152">
// <ele>4.943848</ele>
// <time>2008-10-11T14:55:41Z</time>
// </trkpt>
// Each <trkpt> results in a call to HandlePoint().
// Overall usage: Derive a class from GpxTrkPtHandler with an implementation of
// HandlePoint().
class GpxTrkPtHandler : public kmlbase::ExpatHandler {
public:
GpxTrkPtHandler()
: time_("")
, gather_char_data_(false)
, char_data_("")
{
}
// ExpatHandler::StartElement()
virtual void StartElement(const string& name,
const std::vector <string>& atts) {
if (name.compare("trkpt") == 0) {
// <trkpt lat="-33.911973070" lon="18.422974152">
// If both lat and lon exist and are sane doubles create a Vec3 for
// the point.
boost::scoped_ptr<kmlbase::Attributes> attributes(
kmlbase::Attributes::Create(atts));
if (attributes.get()) {
double latitude;
double longitude;
if (attributes->GetDouble("lat", &latitude) &&
attributes->GetDouble("lon", &longitude)) {
vec3_.reset(new kmlbase::Vec3(longitude, latitude));
}
}
time_.clear();
} else if (name.compare("time") == 0 ||
name.compare("ele") == 0) {
// <time>2008-10-11T14:55:41Z</time>
// <ele>4.943848</ele>
gather_char_data_ = true;
char_data_.clear();
}
}
// ExpatHandler::EndElement()
virtual void EndElement(const string& name) {
if (name.compare("trkpt") == 0) {
// </trkpt>
// If a Vec3 was created for this element call the handler.
if (vec3_.get()) {
HandlePoint(*vec3_, time_);
}
} else if (name.compare("time") == 0) {
// <time>2008-10-11T14:55:41Z</time>
time_ = char_data_;
} else if (name.compare("ele") == 0) {
// <ele>4.943848</ele>
if (vec3_.get()) {
vec3_->set_altitude(strtod(char_data_.c_str(), NULL));
}
}
}
// ExpatHandler::CharData()
virtual void CharData(const string& str) {
if (gather_char_data_) {
char_data_.append(str);
}
}
// This is called for each <trkpt>. This default implemenation does nothing.
virtual void HandlePoint(const kmlbase::Vec3& where,
const string& when) {
};
private:
// A fresh Vec3 is created for each <trkpt>.
boost::scoped_ptr<kmlbase::Vec3> vec3_;
string time_;
bool gather_char_data_;
string char_data_;
};
} // end namespace kmlconvenience
#endif // KML_CONVENIENCE_GPX_TRK_PT_HANDLER_H__
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