time.c (84a73014d86fd660822a20c032625e3afe99ca58) time.c (00b912b0c88e690b1662067497182454357b18b0)
1/*
2 * Common time routines among all ppc machines.
3 *
4 * Written by Cort Dougan (cort@cs.nmt.edu) to merge
5 * Paul Mackerras' version and mine for PReP and Pmac.
6 * MPC8xx/MBX changes by Dan Malek (dmalek@jlc.net).
7 * Converted for 64-bit by Mike Corrigan (mikejc@us.ibm.com)
8 *

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997 ((year) % 100 != 0 || (year) % 400 == 0))
998#define days_in_year(a) (leapyear(a) ? 366 : 365)
999#define days_in_month(a) (month_days[(a) - 1])
1000
1001static int month_days[12] = {
1002 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
1003};
1004
1/*
2 * Common time routines among all ppc machines.
3 *
4 * Written by Cort Dougan (cort@cs.nmt.edu) to merge
5 * Paul Mackerras' version and mine for PReP and Pmac.
6 * MPC8xx/MBX changes by Dan Malek (dmalek@jlc.net).
7 * Converted for 64-bit by Mike Corrigan (mikejc@us.ibm.com)
8 *

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997 ((year) % 100 != 0 || (year) % 400 == 0))
998#define days_in_year(a) (leapyear(a) ? 366 : 365)
999#define days_in_month(a) (month_days[(a) - 1])
1000
1001static int month_days[12] = {
1002 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
1003};
1004
1005/*
1006 * This only works for the Gregorian calendar - i.e. after 1752 (in the UK)
1007 */
1008void GregorianDay(struct rtc_time * tm)
1009{
1010 int leapsToDate;
1011 int lastYear;
1012 int day;
1013 int MonthOffset[] = { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 };
1014
1015 lastYear = tm->tm_year - 1;
1016
1017 /*
1018 * Number of leap corrections to apply up to end of last year
1019 */
1020 leapsToDate = lastYear / 4 - lastYear / 100 + lastYear / 400;
1021
1022 /*
1023 * This year is a leap year if it is divisible by 4 except when it is
1024 * divisible by 100 unless it is divisible by 400
1025 *
1026 * e.g. 1904 was a leap year, 1900 was not, 1996 is, and 2000 was
1027 */
1028 day = tm->tm_mon > 2 && leapyear(tm->tm_year);
1029
1030 day += lastYear*365 + leapsToDate + MonthOffset[tm->tm_mon-1] +
1031 tm->tm_mday;
1032
1033 tm->tm_wday = day % 7;
1034}
1035EXPORT_SYMBOL_GPL(GregorianDay);
1036
1037void to_tm(int tim, struct rtc_time * tm)
1038{
1039 register int i;
1040 register long hms, day;
1041
1042 day = tim / SECDAY;
1043 hms = tim % SECDAY;
1044

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1059 day -= days_in_month(i);
1060 days_in_month(FEBRUARY) = 28;
1061 tm->tm_mon = i;
1062
1063 /* Days are what is left over (+1) from all that. */
1064 tm->tm_mday = day + 1;
1065
1066 /*
1005void to_tm(int tim, struct rtc_time * tm)
1006{
1007 register int i;
1008 register long hms, day;
1009
1010 day = tim / SECDAY;
1011 hms = tim % SECDAY;
1012

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1027 day -= days_in_month(i);
1028 days_in_month(FEBRUARY) = 28;
1029 tm->tm_mon = i;
1030
1031 /* Days are what is left over (+1) from all that. */
1032 tm->tm_mday = day + 1;
1033
1034 /*
1067 * Determine the day of week
1035 * No-one uses the day of the week.
1068 */
1036 */
1069 GregorianDay(tm);
1037 tm->tm_wday = -1;
1070}
1071EXPORT_SYMBOL(to_tm);
1072
1073/*
1074 * Divide a 128-bit dividend by a 32-bit divisor, leaving a 128 bit
1075 * result.
1076 */
1077void div128_by_32(u64 dividend_high, u64 dividend_low,

--- 50 unchanged lines hidden --- 		1038}
1039EXPORT_SYMBOL(to_tm);
1040
1041/*
1042 * Divide a 128-bit dividend by a 32-bit divisor, leaving a 128 bit
1043 * result.
1044 */
1045void div128_by_32(u64 dividend_high, u64 dividend_low,

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