Diff: TimeZone/Time.cpp

Revision:

0:8cdad1c73e8e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TimeZone/Time.cpp	Sun Mar 25 17:26:30 2012 +0000
@@ -0,0 +1,129 @@
+#include "Time.h"
+
+#include "stdio.h"
+// #include "time.h"
+
+using namespace std;
+
+class TimeZoneEntry {
+    public:
+    TimeStamp *_from;
+    TimeStamp *_to;
+    int _offset;
+};
+
+list<TimeZoneEntry*> *Time::_timeZoneEntries=NULL;
+
+bool TimeStamp::isSame(TimeStamp* ts)
+{
+    if (ts->getYear()!=getYear())
+        return false;
+    if (ts->getMonth()!=getMonth())
+        return false;
+    if (ts->getDay()!=getDay())
+        return false;
+    if (ts->getHour()!=getHour())
+        return false;
+    if (ts->getSecond()!=getSecond())
+        return false;
+    return true;
+}
+bool TimeStamp::isBefore(TimeStamp* ts)
+{
+    if (getYear()<ts->getYear())
+        return true;
+    if (getYear()>ts->getYear())
+        return false;
+
+    if (getMonth()<ts->getMonth())
+        return true;
+    if (getMonth()>ts->getMonth())
+        return false;
+
+    if (getDay()<ts->getDay())
+        return true;
+    if (getDay()>ts->getDay())
+        return false;
+
+    if (getHour()<ts->getHour())
+        return true;
+    if (getHour()>ts->getHour())
+        return false;
+
+    if (getSecond()<ts->getSecond())
+        return true;
+    return false;        
+}
+bool TimeStamp::isAfter(TimeStamp* ts)
+{
+    return ts->isBefore(this);        
+}
+
+Time::Time() {
+    if (NULL==Time::_timeZoneEntries) {
+        _timeZoneEntries=new list<TimeZoneEntry*>();
+        readTimeZones();
+    }
+}
+
+void Time::readTimeZones() {
+    time_t rawtime;
+    time ( &rawtime );
+    TimeStamp ts(rawtime);
+
+    int currentYear=ts.getYear();
+
+    FILE *fp = fopen("/local/Edmonton.csv", "r");
+
+    if (fp==NULL) {
+        printf("error while reading timezone file\n");
+        return;
+    }
+
+
+    char tmp[128]; // enough for a single line
+    while (fgets(tmp,sizeof(tmp),fp)!=0) {
+        int fyear, fmon, fday, fhour, fmin, fsec;
+        int tyear, tmon, tday, thour, tmin, tsec;
+        int offset;
+        int r=sscanf(tmp,"%4d-%2d-%2dT%2d:%2d:%2dZ,%4d-%2d-%2dT%2d:%2d:%2dZ,%d",
+                     &fyear, &fmon, &fday, &fhour, &fmin, &fsec,
+                     &tyear, &tmon, &tday, &thour, &tmin, &tsec,
+                     &offset
+                    );
+        if (13!=r)
+            continue;
+        if (fyear<currentYear || tyear>currentYear+5)
+            continue;
+        
+        TimeStamp *from=new TimeStamp(fyear, fmon, fday, fhour, fmin, fsec);
+        TimeStamp *to=new TimeStamp(tyear, tmon, tday, thour, tmin, tsec);
+        TimeZoneEntry *tze=new TimeZoneEntry();
+        tze->_from=from;
+        tze->_to=to;
+        tze->_offset=offset;
+        _timeZoneEntries->push_back(tze);
+    }
+
+    fclose(fp);
+}
+
+Time::~Time() {
+}
+
+TimeStamp* Time::getTime() {
+    time_t rawtime;
+    time ( &rawtime );
+    TimeStamp *ts=new TimeStamp(rawtime);
+
+    for (list<TimeZoneEntry*>::iterator it = _timeZoneEntries->begin(); it != _timeZoneEntries->end(); it++) {
+        TimeZoneEntry* tze=*it;
+        if (tze->_from->isBefore(ts) && tze->_to->isAfter(ts))
+        {
+            rawtime+=tze->_offset;
+            ts->updateTime(rawtime);
+        }
+    }
+    
+    return ts;
+}