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AK+LibC+Kernel: Have fewer implementations of year_to_days_in_epoch

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I believe the implementation in RTC.cpp had an off-by-one
in the year passed to is_leap_year(). If that's true, then this
fixes that too.
This commit is contained in:
Nico Weber 2020-08-25 16:53:36 -04:00 • committed by Andreas Kling
parent 84ed257959
commit 9b17082899
3 changed files with 13 additions and 18 deletions
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14
Kernel/RTC.cpp
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@ -93,18 +93,6 @@ static unsigned days_in_months_since_start_of_year(unsigned month, unsigned year
return days;
}
static unsigned days_in_years_since_epoch(unsigned year)
{
unsigned days = 0;
while (year > 1969) {
days += 365;
if (is_leap_year(year))
++days;
--year;
}
return days;
}
static u8 bcd_to_binary(u8 bcd)
{
return (bcd & 0x0F) + ((bcd >> 4) * 10);
@ -160,7 +148,7 @@ time_t now()
ASSERT(year >= 2018);
return days_in_years_since_epoch(year - 1) * 86400
return years_to_days_since_epoch(year) * 86400
+ days_in_months_since_start_of_year(month - 1, year) * 86400
+ (day - 1) * 86400
+ hour * 3600