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Made easter algorithm static in Date

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This commit is contained in:
Federico Hernandez 2010-03-23 02:51:31 +01:00
parent 10450963cb
commit d3628c04db
3 changed files with 35 additions and 35 deletions
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52
src/Date.cpp
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@ -643,6 +643,32 @@ int Date::monthOfYear (const std::string& input)
return -1;
}
////////////////////////////////////////////////////////////////////////////////
time_t Date::easter (int year)
{
int Y = year;
int a = Y % 19;
int b = Y / 100;
int c = Y % 100;
int d = b / 4;
int e = b % 4;
int f = (b + 8) / 25;
int g = (b - f + 1) / 3;
int h = (19 * a + b - d - g + 15) % 30;
int i = c / 4;
int k = c % 4;
int L = (32 + 2 * e + 2 * i - h - k) % 7;
int m = (a + 11 * h + 22 * L) / 451;
int month = (h + L - 7 * m + 114) / 31;
int day = ((h + L - 7 * m + 114) % 31) + 1;
struct tm t = {0};
t.tm_isdst = -1; // Requests that mktime determine summer time effect.
t.tm_mday = day;
t.tm_mon = month - 1;
t.tm_year = year - 1900;
return mktime (&t);
}
////////////////////////////////////////////////////////////////////////////////
int Date::month () const
{
@ -964,29 +990,3 @@ bool Date::isRelativeDate (const std::string& input)
}
////////////////////////////////////////////////////////////////////////////////
time_t easter (int year)
{
int Y = year;
int a = Y % 19;
int b = Y / 100;
int c = Y % 100;
int d = b / 4;
int e = b % 4;
int f = (b + 8) / 25;
int g = (b - f + 1) / 3;
int h = (19 * a + b - d - g + 15) % 30;
int i = c / 4;
int k = c % 4;
int L = (32 + 2 * e + 2 * i - h - k) % 7;
int m = (a + 11 * h + 22 * L) / 451;
int month = (h + L - 7 * m + 114) / 31;
int day = ((h + L - 7 * m + 114) % 31) + 1;
struct tm t = {0};
t.tm_isdst = -1; // Requests that mktime determine summer time effect.
t.tm_mday = day;
t.tm_mon = month - 1;
t.tm_year = year - 1900;
return mktime (&t);
}
////////////////////////////////////////////////////////////////////////////////