void Date::validate(int day, int month, int year) {
int chek;
int LeapYear;
if ( month > 12 || month < 1) {
throw InvalidDate ("invalid month");
}
LeapYear = this->year % 4;
chek = (this->month % 2) ^ (this->month / 8);
if ( chek == 1 ) {
if (this->day > 31) {
throw InvalidDate ("invalid day");
};
} else if ( this->month == 2 ) {
if ( LeapYear == 0) {
if (this->day > 28) {
throw InvalidDate("invalid day");
}
} else {
if (this->day > 29) {
throw InvalidDate("invalid day");
}
}
} else {
if (this->day > 30) {
throw InvalidDate("invalid day");
}
}
}
void greg2jul(unsigned& jd, int y, int m, int d)
{
if( ! Date::isValid(y, m, d) )
{
throw InvalidDate();
}
jd=(1461*(y+4800+(m-14)/12))/4+(367*(m-2-12*((m-14)/12)))/12-(3*((y+4900+(m-14)/12)/100))/4+d-32075;
}
Date::Date(const std::string& str, const std::string& fmt)
{
unsigned year = 0;
unsigned month = 1;
unsigned day = 1;
enum {
state_0,
state_fmt,
state_two
} state = state_0;
try
{
std::string::const_iterator dit = str.begin();
std::string::const_iterator it;
for (it = fmt.begin(); it != fmt.end() && dit != str.end(); ++it)
{
char ch = *it;
switch (state)
{
case state_0:
if (ch == '%')
state = state_fmt;
else
{
if (ch == '*')
skipNonDigit(dit, str.end());
else if (*dit != ch && ch != '?')
throw InvalidDate("string <" + str + "> does not match date format <" + fmt + '>');
else
++dit;
}
break;
case state_fmt:
if (*it != '%')
state = state_0;
switch (ch)
{
case 'Y':
year = getInt(dit, str.end(), 4);
break;
case 'y':
year = getInt(dit, str.end(), 2);
year += (year < 50 ? 2000 : 1900);
break;
case 'm':
month = getUnsigned(dit, str.end(), 2);
break;
case 'd':
day = getUnsigned(dit, str.end(), 2);
break;
case '2':
state = state_two;
break;
default:
throw InvalidDate("invalid date format <" + fmt + '>');
}
break;
case state_two:
state = state_0;
switch (ch)
{
case 'm': month = getUnsignedF(dit, str.end(), 2); break;
case 'd': day = getUnsignedF(dit, str.end(), 2); break;
default:
throw InvalidDate("invalid date format <" + fmt + '>');
}
}
}
if (it != fmt.end() || dit != str.end())
throw InvalidDate("string <" + str + "> does not match date format <" + fmt + '>');
set(year, month, day);
}
catch (const std::invalid_argument&)
{
throw InvalidDate("string <" + str + "> does not match date format <" + fmt + '>');
}
}
void Book::setDate(Date d) {
if (!d.isValid()) throw InvalidDate();
else dateAdded = d;
}
