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-rw-r--r--example/ntp.cpp130
1 files changed, 130 insertions, 0 deletions
diff --git a/example/ntp.cpp b/example/ntp.cpp
new file mode 100644
index 0000000..5357cae
--- a/dev/null
+++ b/example/ntp.cpp
@@ -0,0 +1,130 @@
+#include "ntp.h"
+#include <qpushbutton.h>
+#include <qregexp.h>
+#include <qlabel.h>
+#include <qlineedit.h>
+#include <qmultilineedit.h>
+#include <opie/oprocess.h>
+#include <qpe/config.h>
+#include <qpe/global.h>
+#include <qpe/timeconversion.h>
+#include <qpe/tzselect.h>
+#include <qpe/timestring.h>
+#include <qpe/qpedialog.h>
+#include <sys/time.h>
+#include <time.h>
+#include <stdlib.h>
+
+
+Ntp::Ntp( QWidget* parent, const char* name, WFlags fl )
+ : NtpBase( parent, name, fl )
+{
+ Config cfg("ntp",Config::User);
+ cfg.setGroup("settings");
+ _maxOffset = cfg.readNumEntry("maxOffset",5);
+ _minLookupDiff = cfg.readNumEntry("minLookupDiff",10);
+ LineEditNtpServer->setText( cfg.readEntry("ntpServer") );
+ ntpProcess = new OProcess( );
+ connect ( ntpProcess, SIGNAL(receivedStdout(OProcess*,char*,int)),
+ this, SLOT(getNtpOutput(OProcess*,char*,int)));
+ connect ( ntpProcess, SIGNAL(processExited(OProcess*)),
+ this, SLOT(ntpFinished(OProcess*)));
+ connect(runNtp, SIGNAL(clicked()), this, SLOT(slotRunNtp()));
+ _nextCorrection = new QTimer( this );
+ connect( _nextCorrection, SIGNAL(timeout()), SLOT(correctClock()) );
+ slotRunNtp();
+}
+
+Ntp::~Ntp()
+{
+ Config cfg("ntp",Config::User);
+ cfg.setGroup("settings");
+ cfg.writeEntry("ntpServer", LineEditNtpServer->text());
+}
+
+
+void Ntp::slotRunNtp()
+{
+ TextLabelStartTime->setText(QDateTime::currentDateTime().toString());
+ ntpProcess->clearArguments();
+ *ntpProcess << "ntpdate" << LineEditNtpServer->text();
+ bool ret = ntpProcess->start(OProcess::NotifyOnExit,OProcess::AllOutput);
+ if ( !ret ) {
+ qDebug("Error while executing ntp");
+ outPut->append("\nError while executing\n\n");
+ }
+}
+
+void Ntp::getNtpOutput(OProcess *proc, char *buffer, int buflen)
+{
+ QString lineStr, lineStrOld;
+ lineStr = buffer;
+ lineStr=lineStr.left(buflen);
+ if (lineStr!=lineStrOld)
+ {
+ outPut->append(lineStr);
+ _ntpOutput += lineStr;
+ }
+ lineStrOld = lineStr;
+}
+
+void Ntp::ntpFinished(OProcess*)
+{
+ Config cfg("ntp",Config::User);
+ cfg.setGroup("lookups");
+ int lastLookup = cfg.readNumEntry("time",0);
+ int lookupCount = cfg.readNumEntry("count",-1);
+ int time = TimeConversion::toUTC( QDateTime::currentDateTime() );
+ cfg.writeEntry("time", time);
+
+ float timeShift = getTimeShift();
+ int secsSinceLast = time - lastLookup;
+ TextLabelNewTime->setText(QDateTime::currentDateTime().toString());
+ if ( lastLookup > 0 && secsSinceLast > 60*_minLookupDiff)
+ {
+ lookupCount++;
+ cfg.writeEntry("count",lookupCount);
+ cfg.setGroup("lookup_"+QString::number(lookupCount));
+ _shiftPerSec = timeShift / secsSinceLast;
+ float nextCorr = _maxOffset / _shiftPerSec;
+ qDebug("secs since last lookup %i", secsSinceLast);qDebug("timeshift since last lookup %f", timeShift);qDebug("timeshift since per sec %f", _shiftPerSec);qDebug("in %f secs the time will be shifted by %i", nextCorr,_maxOffset);
+ cfg.writeEntry("secsSinceLast",secsSinceLast);
+ cfg.writeEntry("timeShift",QString::number(timeShift));
+ }
+}
+
+void Ntp::correctClock()
+{
+ qDebug("current time: %s",QDateTime::currentDateTime().toString().latin1());
+ Config cfg("ntp",Config::User);
+ cfg.setGroup("correction");
+ int lastTime = cfg.readNumEntry("time",0);
+ int now = TimeConversion::toUTC( QDateTime::currentDateTime() );
+ int corr = int((now - lastTime) * _shiftPerSec);
+ outPut->append( "time will be shifted by "+QString::number(corr)+ "secs");
+ struct timeval myTv;
+ myTv.tv_sec = TimeConversion::toUTC( QDateTime::currentDateTime().addSecs(corr) );
+ myTv.tv_usec = 0;
+
+ if ( myTv.tv_sec != -1 )
+ ::settimeofday( &myTv, 0 );
+ Global::writeHWClock();
+ cfg.writeEntry("time",now);
+ qDebug("current time: %s",QDateTime::currentDateTime().toString().latin1());
+}
+
+float Ntp::getTimeShift()
+{
+ QString _offset = "offset";
+ QString _sec = "sec";
+ QRegExp _reOffset = QRegExp(_offset);
+ QRegExp _reEndOffset = QRegExp(_sec);
+ int posOffset = _reOffset.match( _ntpOutput );
+ int posEndOffset = _reEndOffset.match( _ntpOutput, posOffset );
+ posOffset += _offset.length() + 1;
+ QString diff = _ntpOutput.mid(posOffset, posEndOffset-posOffset-1);
+ qDebug("%s", _ntpOutput.latin1());
+ qDebug("diff = >%s<",diff.latin1());
+ TextLabelTimeShift->setText(diff);
+ return diff.toFloat();
+} \ No newline at end of file