diff options
Diffstat (limited to 'backends/platform/ps2/ps2time.cpp')
| -rw-r--r-- | backends/platform/ps2/ps2time.cpp | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/backends/platform/ps2/ps2time.cpp b/backends/platform/ps2/ps2time.cpp index 2c3275b2b2..1cddd230a0 100644 --- a/backends/platform/ps2/ps2time.cpp +++ b/backends/platform/ps2/ps2time.cpp @@ -105,8 +105,14 @@ void OSystem_PS2::readRtcTime(void) { g_day, g_month, g_year + 2000); } -void OSystem_PS2::getTimeAndDate(TimeDate &t) const { +// Tomohiko Sakamoto's 1993 algorithm for any Gregorian date +static int dayOfWeek(int y, int m, int d) { + static const int t[] = { 0, 3, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4 }; + y -= m < 3; + return (y + y / 4 - y / 100 + y / 400 + t[m - 1] + d) % 7; +} +void OSystem_PS2::getTimeAndDate(TimeDate &t) const { uint32 currentSecs = g_timeSecs + (msecCount - g_lastTimeCheck) / 1000; if (currentSecs >= SECONDS_PER_DAY) { buildNewDate(+1); @@ -120,4 +126,5 @@ void OSystem_PS2::getTimeAndDate(TimeDate &t) const { t.tm_year = g_year + 100; t.tm_mday = g_day; t.tm_mon = g_month - 1; + t.tm_wday = dayOfWeek(t.tm_year, t.tm_mon, t.tm_mday); } |