added: some methods for parsing from a string

git-svn-id: svn://ttmath.org/publicrep/pikotools/trunk@412 e52654a7-88a9-db11-a3e9-0013d4bc506e

date/date.cpp

@@ -255,6 +255,35 @@ void Date::AssertCorrectDate()
 }
 
 
+bool Date::IsCorrectDate()
+{
+	// 10000 is only a 'cosmetic' limit
+	// we can make calculations with greater values
+
+	if( year < 1970 || year > 10000 )
+		return false;
+
+	if( month < 1 || month > 12 )
+		return false;
+
+	if( day < 1 || day > MonthLen(year, month) )
+		return false;
+
+	if( hour < 0 || hour > 23 )
+		return false;
+
+	if( min < 0 || min > 59 )
+		return false;
+
+	if( sec < 0 || sec > 59 )
+		return false;
+
+return true;
+}
+
+
+
+
 
 int Date::MonthLen(int y, int m)
 {
@@ -381,5 +410,7 @@ return (int)((d+3) % 7);
 
 
 
+
+
 } // namespace