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flightgear/src/Airports/runwayprefs.cxx
James Turner 386d87e098 Cleanup exit handling. 
Replace many lingering calls to exit() from the code,
replacing most with exception throws, which can be
caught by the existing mechanisms.

Update the option-parsing code to return an explicit
value indicating what to do (e.g., exit status to return
to the shell).
2013-10-15 22:16:50 +01:00

420 lines
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// runwayprefs.cxx - class implementations corresponding to runwayprefs.hxx
// assignments by the AI code
//
// Written by Durk Talsma, started January 2005.
//
// Copyright (C) 2004 Durk Talsma.
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation; either version 2 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// $Id$
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <math.h>
#include <cstdlib>
#include <cstring>
#include <boost/foreach.hpp>
#include <simgear/compiler.h>
#include <simgear/debug/logstream.hxx>
#include <simgear/misc/strutils.hxx>
#include <simgear/structure/exception.hxx>
#include <Main/globals.hxx>
#include <Airports/runways.hxx>
#include "runwayprefs.hxx"
#include "airport.hxx"
using namespace simgear;
/******************************************************************************
* ScheduleTime
***************e*************************************************************/
void ScheduleTime::clear()
{
start.clear();
end.clear();
scheduleNames.clear();
}
ScheduleTime::ScheduleTime(const ScheduleTime & other)
{
//timeVec start;
timeVecConstIterator i;
for (i = other.start.begin(); i != other.start.end(); i++)
start.push_back(*i);
for (i = other.end.begin(); i != other.end.end(); i++)
end.push_back(*i);
stringVecConstIterator k;
for (k = other.scheduleNames.begin(); k != other.scheduleNames.end();
k++)
scheduleNames.push_back(*k);
//timeVec end;
//stringVec scheduleNames;
tailWind = other.tailWind;
crssWind = other.tailWind;
}
ScheduleTime & ScheduleTime::operator=(const ScheduleTime & other)
{
//timeVec start;
clear();
timeVecConstIterator i;
for (i = other.start.begin(); i != other.start.end(); i++)
start.push_back(*i);
for (i = other.end.begin(); i != other.end.end(); i++)
end.push_back(*i);
stringVecConstIterator k;
for (k = other.scheduleNames.begin(); k != other.scheduleNames.end();
k++)
scheduleNames.push_back(*k);
//timeVec end;
//stringVec scheduleNames;
tailWind = other.tailWind;
crssWind = other.tailWind;
return *this;
}
std::string ScheduleTime::getName(time_t dayStart)
{
if ((start.size() != end.size())
|| (start.size() != scheduleNames.size())) {
SG_LOG(SG_GENERAL, SG_INFO, "Unable to parse schedule times");
throw sg_exception("Unable to parse schedule times");
} else {
int nrItems = start.size();
//cerr << "Nr of items to process: " << nrItems << endl;
if (nrItems > 0) {
for (unsigned int i = 0; i < start.size(); i++) {
//cerr << i << endl;
if ((dayStart >= start[i]) && (dayStart <= end[i]))
return scheduleNames[i];
}
}
//couldn't find one so return 0;
//cerr << "Returning 0 " << endl;
}
return std::string("");
}
/******************************************************************************
* RunwayList
*****************************************************************************/
RunwayList::RunwayList(const RunwayList & other)
{
type = other.type;
stringVecConstIterator i;
for (i = other.preferredRunways.begin();
i != other.preferredRunways.end(); i++)
preferredRunways.push_back(*i);
}
RunwayList & RunwayList::operator=(const RunwayList & other)
{
type = other.type;
preferredRunways.clear();
stringVecConstIterator i;
for (i = other.preferredRunways.begin();
i != other.preferredRunways.end(); i++)
preferredRunways.push_back(*i);
return *this;
}
void RunwayList::set(const std::string & tp, const std::string & lst)
{
//weekday = atoi(timeCopy.substr(0,1).c_str());
// timeOffsetInDays = weekday - currTimeDate->getGmt()->tm_wday;
// timeCopy = timeCopy.substr(2,timeCopy.length());
type = tp;
BOOST_FOREACH(std::string s, strutils::split(lst, ",")) {
std::string ident = strutils::strip(s);
// http://code.google.com/p/flightgear-bugs/issues/detail?id=1137
if ((ident.size() < 2) || !isdigit(ident[1])) {
SG_LOG(SG_GENERAL, SG_INFO, "RunwayList::set: padding runway ident '" << ident << "'");
ident = "0" + ident;
}
preferredRunways.push_back(ident);
}
}
void RunwayList::clear()
{
type = "";
preferredRunways.clear();
}
/****************************************************************************
*
***************************************************************************/
RunwayGroup::RunwayGroup(const RunwayGroup & other)
{
name = other.name;
RunwayListVecConstIterator i;
for (i = other.rwyList.begin(); i != other.rwyList.end(); i++)
rwyList.push_back(*i);
choice[0] = other.choice[0];
choice[1] = other.choice[1];
nrActive = other.nrActive;
}
RunwayGroup & RunwayGroup::operator=(const RunwayGroup & other)
{
rwyList.clear();
name = other.name;
RunwayListVecConstIterator i;
for (i = other.rwyList.begin(); i != other.rwyList.end(); i++)
rwyList.push_back(*i);
choice[0] = other.choice[0];
choice[1] = other.choice[1];
nrActive = other.nrActive;
return *this;
}
void RunwayGroup::setActive(const FGAirport * airport,
double windSpeed,
double windHeading,
double maxTail,
double maxCross, stringVec * currentlyActive)
{
FGRunway *rwy;
int activeRwys = rwyList.size(); // get the number of runways active
int nrOfPreferences;
// bool found = true;
// double heading;
double hdgDiff;
double crossWind;
double tailWind;
std::string name;
//stringVec names;
int bestMatch = 0, bestChoice = 0;
if (activeRwys > 0) {
// Now downward iterate across all the possible preferences
// starting by the least preferred choice working toward the most preferred choice
nrOfPreferences = rwyList[0].getRwyList()->size();
bool validSelection = true;
bool foundValidSelection = false;
for (int i = nrOfPreferences - 1; i >= 0; i--) {
int match = 0;
// Test each runway listed in the preference to see if it's possible to use
// If one runway of the selection isn't allowed, we need to exclude this
// preference, however, we don't want to stop right there, because we also
// don't want to randomly swap runway preferences, unless there is a need to.
//
validSelection = true;
for (int j = 0; j < activeRwys; j++) {
std::string ident(rwyList[j].getRwyList(i));
if (!airport->hasRunwayWithIdent(ident)) {
SG_LOG(SG_GENERAL, SG_WARN,
"no such runway:" << ident << " at " <<
airport->ident());
continue;
}
rwy = airport->getRunwayByIdent(ident);
//cerr << "Succes" << endl;
hdgDiff = fabs(windHeading - rwy->headingDeg());
name = rwy->name();
if (hdgDiff > 180)
hdgDiff = 360 - hdgDiff;
//cerr << "Heading diff: " << hdgDiff << endl;
hdgDiff *= ((2 * M_PI) / 360.0); // convert to radians
crossWind = windSpeed * sin(hdgDiff);
tailWind = -windSpeed * cos(hdgDiff);
//cerr << "Runway : " << rwy->name() << ": " << rwy->headingDeg() << endl;
//cerr << ". Tailwind : " << tailWind;
//cerr << ". Crosswnd : " << crossWind;
if ((tailWind > maxTail) || (crossWind > maxCross)) {
//cerr << ". [Invalid] " << endl;
validSelection = false;
} else {
//cerr << ". [Valid] ";
}
//cerr << endl;
for (stringVecIterator it = currentlyActive->begin();
it != currentlyActive->end(); it++) {
//cerr << "Checking : \"" << (*it) << "\". vs \"" << name << "\"" << endl;
if ((*it) == name) {
match++;
}
}
} // of active runways iteration
if (validSelection) {
//cerr << "Valid selection : " << i << endl;;
foundValidSelection = true;
if (match >= bestMatch) {
bestMatch = match;
bestChoice = i;
}
}
//cerr << "Preference " << i << "Match " << match << " bestMatch " << bestMatch << " choice " << bestChoice << " valid selection " << validSelection << endl;
}
if (foundValidSelection) {
//cerr << "Valid runay selection : " << bestChoice << endl;
nrActive = activeRwys;
active = bestChoice;
return;
}
// If this didn't work, due to heavy winds, try again
// but select only one landing and one takeoff runway.
choice[0] = 0;
choice[1] = 0;
for (int i = activeRwys - 1; i; i--) {
if (rwyList[i].getType() == std::string("landing"))
choice[0] = i;
if (rwyList[i].getType() == std::string("takeoff"))
choice[1] = i;
}
//cerr << "Choosing " << choice[0] << " for landing and " << choice[1] << "for takeoff" << endl;
nrOfPreferences = rwyList[0].getRwyList()->size();
for (int i = 0; i < nrOfPreferences; i++) {
bool validSelection = true;
for (int j = 0; j < 2; j++) {
name = rwyList[choice[j]].getRwyList(i);
rwy = airport->getRunwayByIdent(name);
//cerr << "Succes" << endl;
hdgDiff = fabs(windHeading - rwy->headingDeg());
if (hdgDiff > 180)
hdgDiff = 360 - hdgDiff;
hdgDiff *= ((2 * M_PI) / 360.0); // convert to radians
crossWind = windSpeed * sin(hdgDiff);
tailWind = -windSpeed * cos(hdgDiff);
if ((tailWind > maxTail) || (crossWind > maxCross))
validSelection = false;
}
if (validSelection) {
//cerr << "Valid runay selection : " << i << endl;
active = i;
nrActive = 2;
return;
}
}
}
active = -1;
nrActive = 0;
}
void RunwayGroup::getActive(int i, std::string & name, std::string & type)
{
if (i == -1) {
return;
}
if (nrActive == (int) rwyList.size()) {
name = rwyList[i].getRwyList(active);
type = rwyList[i].getType();
} else {
name = rwyList[choice[i]].getRwyList(active);
type = rwyList[choice[i]].getType();
}
}
/*****************************************************************************
* FGRunway preference
****************************************************************************/
FGRunwayPreference::FGRunwayPreference(FGAirport * ap):
_ap(ap)
{
//cerr << "Running default Constructor" << endl;
initialized = false;
}
FGRunwayPreference::FGRunwayPreference(const FGRunwayPreference & other)
{
initialized = other.initialized;
comTimes = other.comTimes; // Commercial Traffic;
genTimes = other.genTimes; // General Aviation;
milTimes = other.milTimes; // Military Traffic;
PreferenceListConstIterator i;
for (i = other.preferences.begin(); i != other.preferences.end(); i++)
preferences.push_back(*i);
}
FGRunwayPreference & FGRunwayPreference::operator=(const FGRunwayPreference
& other)
{
initialized = other.initialized;
comTimes = other.comTimes; // Commercial Traffic;
genTimes = other.genTimes; // General Aviation;
milTimes = other.milTimes; // Military Traffic;
PreferenceListConstIterator i;
preferences.clear();
for (i = other.preferences.begin(); i != other.preferences.end(); i++)
preferences.push_back(*i);
return *this;
}
ScheduleTime *FGRunwayPreference::getSchedule(const char *trafficType)
{
if (!(strcmp(trafficType, "com"))) {
return &comTimes;
}
if (!(strcmp(trafficType, "gen"))) {
return &genTimes;
}
if (!(strcmp(trafficType, "mil"))) {
return &milTimes;
}
return 0;
}
RunwayGroup *FGRunwayPreference::getGroup(const std::string & groupName)
{
PreferenceListIterator i = preferences.begin();
if (preferences.begin() == preferences.end())
return 0;
while (!(i == preferences.end() || i->getName() == groupName))
i++;
if (i != preferences.end())
return &(*i);
else
return 0;
}
std::string FGRunwayPreference::getId()
{
return _ap->getId();
};
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