[pclasses-cvs] pclasses2/src Date.cpp,1.2,1.3

[Loof, D. <dl...@us...>]

Update of /cvsroot/pclasses/pclasses2/src
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv11915/src

Modified Files:
	Date.cpp 
Log Message:
add operators +, -, +=, -=

Index: Date.cpp
===================================================================
RCS file: /cvsroot/pclasses/pclasses2/src/Date.cpp,v
retrieving revision 1.2
retrieving revision 1.3
diff -u -d -r1.2 -r1.3
--- Date.cpp	27 Dec 2004 05:33:15 -0000	1.2
+++ Date.cpp	19 Jan 2005 16:25:17 -0000	1.3
@@ -171,6 +171,57 @@
 	return (!operator==(d));
 }
 
+Date& Date::operator+=(const TimeSpan& sp) throw()
+{
+	int tmp = (int)_day + sp.days();
+	while ( tmp > daysInMonth(_month, _year) )
+	{
+		tmp -= daysInMonth(_month, _year);
+		if ( _month == 12 )
+		{
+			_month = 1;
+			++_year;
+		}
+		else
+			++_month;
+	}
+	_day = tmp;
+	return *this;
+}
+
+Date& Date::operator-=(const TimeSpan& sp) throw()
+{
+	int tmp = (int)_day - sp.days();
+	while ( tmp < 1 )
+	{
+		if ( _month == 1 )
+		{
+			_month = 12;
+			--_year;
+		}
+		else
+			--_month;
+			
+		tmp += daysInMonth(_month, _year);
+	}
+	_day = tmp;
+	return *this;
+}
+
+Date operator+(const Date& d, const TimeSpan& sp) throw()
+{
+	Date ret = d;
+	ret += sp;
+	return ret;
+}
+
+Date operator-(const Date& d, const TimeSpan& sp) throw()
+{
+	Date ret = d;
+	ret -= sp;
+	return ret;
+}
+
 std::ostream& operator << (std::ostream& os, const Date& d)
 {
 	int oldw = os.width();