bool
EMDate :: IsValid () const
{ // only one needs to be valid
return IsYearValid()
|| IsMonthValid()
|| IsDayValid();
}
void
EMDate :: _rollDay()
{
int16 daysInMonth = DaysInMonth();
if (daysInMonth < 1) {
fMonth = 1;
daysInMonth = DaysInMonth();
}
//printf("\t\t_rollDay() : %i / %i\n", fDay, daysInMonth);
if (fDay < 1) { // going backwards!
--fMonth;
_rollMonth();
fDay += DaysInMonth();
} else if (fDay > daysInMonth) {
++fMonth;
fDay = daysInMonth - fDay;
daysInMonth = DaysInMonth();
if (fDay > daysInMonth)
fDay = daysInMonth;
if (fDay < 1) // result of fDay > daysInMonth
fDay = -fDay;
_rollMonth();
}
if (!IsDayValid())
_rollDay();
// should never recurse more than once
}
EMDate&
EMDate :: operator -= (const EMDate& other)
{
if (!IsValid() || !other.IsValid())
return *this; // you can't subtract from an invalid date
if (other.fDay > 0) {
if (IsDayValid()) {
fDay -= other.fDay;
_rollDay();
_rollMonth();
}
}
if (other.IsMonthValid()) {
if (IsMonthValid()) {
int16 daysInPrevMonth = DaysInMonth();
fMonth -= other.fMonth;
_rollMonth();
if (fDay == daysInPrevMonth)
fDay = DaysInMonth();
if (fDay > DaysInMonth())
fDay = DaysInMonth();
}
}
if (other.IsYearValid()) {
if (IsYearValid())
fYear -= other.fYear;
}
_enforceKeepDay();
return *this;
}
EMDate&
EMDate :: operator += (const EMDate& other)
{
if (!other.IsValid()) // we don't care if we are valid!
return *this;
if (other.fDay > 0) {
if (IsDayValid() == false) {
fDay = other.fDay;
_rollDay();
}
else {
fDay += other.fDay;
_rollDay();
_rollMonth();
}
}
if (other.IsMonthValid()) {
if (IsMonthValid() == false) {
fMonth = other.fMonth;
_rollMonth();
}
else {
int16 daysInPrevMonth = DaysInMonth();
fMonth += other.fMonth;
_rollMonth();
if (fDay == daysInPrevMonth)
fDay = DaysInMonth();
if (fDay > DaysInMonth())
fDay = DaysInMonth();
}
}
if (other.IsYearValid()) {
if (IsYearValid() == false)
fYear = other.fYear;
else
fYear += other.fYear;
}
_enforceKeepDay();
return *this;
}
STATIC
BOOLEAN
EFIAPI
IsTimeValid(
IN EFI_TIME *Time
)
{
// Check the input parameters are within the range specified by UEFI
if (Time->Year < 1900 ||
Time->Year > 9999 ||
Time->Month < 1 ||
Time->Month > 12 ||
!IsDayValid (Time) ||
Time->Hour > 23 ||
Time->Minute > 59 ||
Time->Second > 59 ||
!IsValidTimeZone (Time->TimeZone) ||
!IsValidDaylight (Time->Daylight)) {
return FALSE;
}
return TRUE;
}
BOOLEAN
EFIAPI
IsTimeValid(
IN EFI_TIME *Time
)
{
// Check the input parameters are within the range specified by UEFI
if ((Time->Year < 2000) ||
(Time->Year > 2099) ||
(Time->Month < 1 ) ||
(Time->Month > 12 ) ||
(!IsDayValid (Time) ) ||
(Time->Hour > 23 ) ||
(Time->Minute > 59 ) ||
(Time->Second > 59 ) ||
(Time->Nanosecond > 999999999) ||
(!((Time->TimeZone == EFI_UNSPECIFIED_TIMEZONE) || ((Time->TimeZone >= -1440) && (Time->TimeZone <= 1440)))) ||
(Time->Daylight & (~(EFI_TIME_ADJUST_DAYLIGHT | EFI_TIME_IN_DAYLIGHT)))
) {
return FALSE;
}
return TRUE;
}
