X-Git-Url: http://git.tdb.fi/?p=libs%2Fcore.git;a=blobdiff_plain;f=source%2Ftime%2Ftimezone.cpp;fp=source%2Ftime%2Ftimezone.cpp;h=fd2487b6475600412ca42700aa59cf36d58b7299;hp=0000000000000000000000000000000000000000;hb=3fd9d04e84cdd72aabe8f9878f9e8ff006275bb6;hpb=cd89068b8ebafdc0f888c1aa21498bb93b55d814

diff --git a/source/time/timezone.cpp b/source/time/timezone.cpp
new file mode 100644
index 0000000..fd2487b
--- /dev/null
+++ b/source/time/timezone.cpp
@@ -0,0 +1,80 @@
+/* $Id$
+
+This file is part of libmspcore
+Copyright © 2008  Mikko Rasa, Mikkosoft Productions
+Distributed under the LGPL
+*/
+
+#include <cstdlib>
+#include <sstream>
+#include <iomanip>
+#include <time.h>
+#include "timezone.h"
+#include "units.h"
+
+using namespace std;
+
+namespace {
+
+using Msp::Time::TimeZone;
+
+TimeZone get_local_timezone()
+{
+#ifdef WIN32
+	TIME_ZONE_INFORMATION tzinfo;
+	DWORD dst=GetTimeZoneInformation(&tzinfo);
+	if(dst==TIME_ZONE_ID_INVALID)
+		throw SystemError("Failed to get time zone information", GetLastError());
+
+	int offset=tzinfo.Bias;
+	if(dst==TIME_ZONE_ID_STANDARD)
+		offset+=tzinfo.StandardBias;
+	else if(dst==TIME_ZONE_ID_DAYLIGHT)
+		offset+=tzinfo.DaylightBias;
+
+	return TimeZone(offset);
+#else
+	tzset();
+	return TimeZone(timezone/60);
+#endif
+}
+
+}
+
+namespace Msp {
+namespace Time {
+
+TimeZone::TimeZone():
+	name("UTC")
+{ }
+
+TimeZone::TimeZone(int minutes_west):
+	offset(minutes_west*min)
+{
+	if(minutes_west)
+	{
+		ostringstream ss;
+		ss.fill('0');
+		int m=abs(minutes_west);
+		ss<<"UTC"<<(minutes_west<0 ? '-' : '+')<<m/60;
+		if(m%60)
+			ss<<':'<<setw(2)<<m%60;
+	}
+	else
+		name="UTC";
+}
+
+const TimeZone &TimeZone::utc()
+{
+	static TimeZone tz(0);
+	return tz;
+}
+
+const TimeZone &TimeZone::local()
+{
+	static TimeZone tz=get_local_timezone();
+	return tz;
+}
+
+} // namespace Time
+} // namespace Msp