GIntBig CPLYMDHMSToUnixTime(const struct tm *brokendowntime)
{
GIntBig days;
int mon;
if (brokendowntime->tm_mon < 0 || brokendowntime->tm_mon >= 12)
return -1;
/* Number of days of the current month */
days = brokendowntime->tm_mday - 1;
/* Add the number of days of the current year */
const int* ip = mon_lengths[isleap(TM_YEAR_BASE + brokendowntime->tm_year)];
for(mon=0;mon<brokendowntime->tm_mon;mon++)
days += ip [mon];
/* Add the number of days of the other years */
days += (TM_YEAR_BASE + (GIntBig)brokendowntime->tm_year - EPOCH_YEAR) * DAYSPERNYEAR +
LEAPS_THRU_END_OF(TM_YEAR_BASE + (GIntBig)brokendowntime->tm_year - 1) -
LEAPS_THRU_END_OF(EPOCH_YEAR - 1);
/* Now add the secondes, minutes and hours to the number of days since EPOCH */
return brokendowntime->tm_sec +
brokendowntime->tm_min * SECSPERMIN +
brokendowntime->tm_hour * SECSPERHOUR +
days * SECSPERDAY;
}
VOID fsw_efi_decode_time(OUT EFI_TIME *EfiTime, IN UINT32 UnixTime)
{
long days, rem;
int y, newy, yleap;
const int *ip;
ZeroMem(EfiTime, sizeof(EFI_TIME));
days = UnixTime / SECSPERDAY;
rem = UnixTime % SECSPERDAY;
EfiTime->Hour = (UINT8) (rem / SECSPERHOUR);
rem = rem % SECSPERHOUR;
EfiTime->Minute = (UINT8) (rem / SECSPERMIN);
EfiTime->Second = (UINT8) (rem % SECSPERMIN);
y = EPOCH_YEAR;
while (days < 0 || days >= (long) year_lengths[yleap = isleap(y)]) {
newy = y + days / DAYSPERNYEAR;
if (days < 0)
--newy;
days -= (newy - y) * DAYSPERNYEAR +
LEAPS_THRU_END_OF(newy - 1) -
LEAPS_THRU_END_OF(y - 1);
y = newy;
}
EfiTime->Year = (UINT16)y;
ip = mon_lengths[yleap];
for (EfiTime->Month = 0; days >= (long) ip[EfiTime->Month]; ++(EfiTime->Month))
days = days - (long) ip[EfiTime->Month];
EfiTime->Month++; // adjust range to EFI conventions
EfiTime->Day = (UINT8) (days + 1);
}
/* Compute the `struct tm' representation of *T,
offset OFFSET seconds east of UTC,
and store year, yday, mon, mday, wday, hour, min, sec into *TP.
Return nonzero if successful. */
int
__offtime (const time_t *t, long int offset, struct tm *tp)
{
time_t days, rem, y;
const unsigned short int *ip;
days = *t / SECS_PER_DAY;
rem = *t % SECS_PER_DAY;
rem += offset;
while (rem < 0)
{
rem += SECS_PER_DAY;
--days;
}
while (rem >= SECS_PER_DAY)
{
rem -= SECS_PER_DAY;
++days;
}
tp->tm_hour = rem / SECS_PER_HOUR;
rem %= SECS_PER_HOUR;
tp->tm_min = rem / 60;
tp->tm_sec = rem % 60;
/* January 1, 1970 was a Thursday. */
tp->tm_wday = (4 + days) % 7;
if (tp->tm_wday < 0)
tp->tm_wday += 7;
y = 1970;
#define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
#define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
while (days < 0 || days >= (__isleap (y) ? 366 : 365))
{
/* Guess a corrected year, assuming 365 days per year. */
time_t yg = y + days / 365 - (days % 365 < 0);
/* Adjust DAYS and Y to match the guessed year. */
days -= ((yg - y) * 365
+ LEAPS_THRU_END_OF (yg - 1)
- LEAPS_THRU_END_OF (y - 1));
y = yg;
}
tp->tm_year = y - 1900;
if (tp->tm_year != y - 1900)
{
/* The year cannot be represented due to overflow. */
__set_errno (EOVERFLOW);
return 0;
}
tp->tm_yday = days;
ip = __mon_yday[__isleap(y)];
for (y = 11; days < (long int) ip[y]; --y)
continue;
days -= ip[y];
tp->tm_mon = y;
tp->tm_mday = days + 1;
return 1;
}
/**
* Convert UNIX timestamp to date/time
* Based on code from GNU C Library
*/
void date_from_timestamp(uint32_t timestamp, DateTimeT *date_time)
{
uint16_t y;
int16_t days;
uint32_t rem;
days = timestamp / SECS_PER_DAY;
rem = timestamp % SECS_PER_DAY;
while (rem < 0)
{
rem += SECS_PER_DAY;
--days;
}
while (rem >= SECS_PER_DAY)
{
rem -= SECS_PER_DAY;
++days;
}
date_time->hour = rem / SECS_PER_HOUR;
rem %= SECS_PER_HOUR;
date_time->min = rem / 60;
date_time->sec = rem % 60;
/* January 1, 1970 was a Thursday. */
date_time->wday = (4 + days) % 7;
if (date_time->wday < 0){
date_time->wday += 7;
}
y = 1970;
#define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
#define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
while (days < 0 || days >= (__isleap (y) ? 366 : 365))
{
/* Guess a corrected year, assuming 365 days per year. */
uint16_t yg = y + days / 365 - (days % 365 < 0);
/* Adjust DAYS and Y to match the guessed year. */
days -= ((yg - y) * 365
+ LEAPS_THRU_END_OF (yg - 1)
- LEAPS_THRU_END_OF (y - 1));
y = yg;
}
date_time->year = y - 1900;
if (date_time->year != y - 1900)
{
/* The year cannot be represented due to overflow. */
return;
}
const uint16_t *ip = __mon_yday[__isleap(y)];
for (y = 11; days < (uint16_t)ip[y]; --y){
continue;
}
days -= ip[y];
date_time->mon = y;
date_time->mday = days + 1;
}
/* Compute the `struct tm' representation of *T,
offset OFFSET seconds east of UTC,
and store year, yday, mon, mday, wday, hour, min, sec into *TP.
Return nonzero if successful. */
int
offtime (unsigned long t, efi_time_t *tp)
{
const unsigned short int __mon_yday[2][13] =
{
/* Normal years. */
{ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
/* Leap years. */
{ 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
};
long int days, rem, y;
const unsigned short int *ip;
days = t / SECS_PER_DAY;
rem = t % SECS_PER_DAY;
while (rem < 0) {
rem += SECS_PER_DAY;
--days;
}
while (rem >= SECS_PER_DAY) {
rem -= SECS_PER_DAY;
++days;
}
tp->hour = rem / SECS_PER_HOUR;
rem %= SECS_PER_HOUR;
tp->minute = rem / 60;
tp->second = rem % 60;
/* January 1, 1970 was a Thursday. */
y = 1970;
# define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
# define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
# define __isleap(year) \
((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
while (days < 0 || days >= (__isleap (y) ? 366 : 365)) {
/* Guess a corrected year, assuming 365 days per year. */
long int yg = y + days / 365 - (days % 365 < 0);
/* Adjust DAYS and Y to match the guessed year. */
days -= ((yg - y) * 365 + LEAPS_THRU_END_OF (yg - 1)
- LEAPS_THRU_END_OF (y - 1));
y = yg;
}
tp->year = y;
ip = __mon_yday[__isleap(y)];
for (y = 11; days < (long int) ip[y]; --y)
continue;
days -= ip[y];
tp->month = y + 1;
tp->day = days + 1;
return 1;
}
struct tm *
gmtime(const time_t *clock)
{
static struct tm result;
struct tm *tmp;
long days;
int rem;
long y;
long newy;
const int *ip;
tmp = &result;
days = *clock / SECS_PER_DAY;
rem = *clock % SECS_PER_DAY;
while (rem < 0) {
rem += SECS_PER_DAY;
--days;
}
while (rem >= SECS_PER_DAY) {
rem -= SECS_PER_DAY;
++days;
}
tmp->tm_hour = (int)(rem / SECS_PER_HOUR);
rem = rem % SECS_PER_HOUR;
tmp->tm_min = (int)(rem / SECS_PER_MIN);
tmp->tm_sec = (int)(rem % SECS_PER_MIN);
tmp->tm_wday = (int)((EPOCH_WDAY + days) % DAYS_PER_WEEK);
if (tmp->tm_wday < 0)
tmp->tm_wday += DAYS_PER_WEEK;
y = EPOCH_YEAR;
#define LEAPS_THRU_END_OF(y) ((y) / 4 - (y) / 100 + (y) / 400)
while (days < 0 || days >= (long)__year_lengths[isleap(y)]) {
newy = y + days / DAYS_PER_NYEAR;
if (days < 0)
--newy;
days -= ((long)newy - (long)y) * DAYS_PER_NYEAR +
LEAPS_THRU_END_OF(newy > 0 ? newy - 1L : newy) -
LEAPS_THRU_END_OF(y > 0 ? y - 1L : y);
y = newy;
}
tmp->tm_year = y - TM_YEAR_BASE;
tmp->tm_yday = days;
ip = __mon_lengths[isleap(y)];
for (tmp->tm_mon = 0; days >= ip[tmp->tm_mon]; ++(tmp->tm_mon))
days = days - ip[tmp->tm_mon];
tmp->tm_mday = (days + 1);
tmp->tm_isdst = 0;
return (tmp);
}
/**
* virTimeFieldsThenRaw:
* @when: the time to convert in milliseconds
* @fields: filled with time @when fields
*
* Converts the timestamp @when into broken-down field format.
* Time time is always in UTC
*
* Returns 0 on success, -1 on error with errno set
*/
int virTimeFieldsThenRaw(unsigned long long when, struct tm *fields)
{
/* This code is taken from GLibC under terms of LGPLv2+ */
long int days, rem, y;
const unsigned short int *ip;
unsigned long long whenSecs = when / 1000ull;
unsigned int offset = 0; /* We hardcoded GMT */
days = whenSecs / SECS_PER_DAY;
rem = whenSecs % SECS_PER_DAY;
rem += offset;
while (rem < 0) {
rem += SECS_PER_DAY;
--days;
}
while (rem >= SECS_PER_DAY) {
rem -= SECS_PER_DAY;
++days;
}
fields->tm_hour = rem / SECS_PER_HOUR;
rem %= SECS_PER_HOUR;
fields->tm_min = rem / 60;
fields->tm_sec = rem % 60;
/* January 1, 1970 was a Thursday. */
fields->tm_wday = (4 + days) % 7;
if (fields->tm_wday < 0)
fields->tm_wday += 7;
y = 1970;
while (days < 0 || days >= (is_leap_year(y) ? 366 : 365)) {
/* Guess a corrected year, assuming 365 days per year. */
long int yg = y + days / 365 - (days % 365 < 0);
/* Adjust DAYS and Y to match the guessed year. */
days -= ((yg - y) * 365
+ LEAPS_THRU_END_OF(yg - 1)
- LEAPS_THRU_END_OF(y - 1));
y = yg;
}
fields->tm_year = y - 1900;
fields->tm_yday = days;
ip = __mon_yday[is_leap_year(y)];
for (y = 11; days < (long int) ip[y]; --y)
continue;
days -= ip[y];
fields->tm_mon = y;
fields->tm_mday = days + 1;
return 0;
}
struct tm * myCPLUnixTimeToYMDHMS(GIntBig unixTime, struct tm* pRet)
{
GIntBig days = unixTime / SECSPERDAY;
GIntBig rem = unixTime % SECSPERDAY;
GIntBig y = EPOCH_YEAR;
int yleap;
const int* ip;
while (rem < 0) {
rem += SECSPERDAY;
--days;
}
pRet->tm_hour = (int) (rem / SECSPERHOUR);
rem = rem % SECSPERHOUR;
pRet->tm_min = (int) (rem / SECSPERMIN);
/*
** A positive leap second requires a special
** representation. This uses "... ??:59:60" et seq.
*/
pRet->tm_sec = (int) (rem % SECSPERMIN);
pRet->tm_wday = (int) ((EPOCH_WDAY + days) % DAYSPERWEEK);
if (pRet->tm_wday < 0)
pRet->tm_wday += DAYSPERWEEK;
while (days < 0 || days >= (GIntBig) year_lengths[yleap = isleap(y)])
{
GIntBig newy;
newy = y + days / DAYSPERNYEAR;
if (days < 0)
--newy;
days -= (newy - y) * DAYSPERNYEAR +
LEAPS_THRU_END_OF(newy - 1) -
LEAPS_THRU_END_OF(y - 1);
y = newy;
}
pRet->tm_year = (int) (y - TM_YEAR_BASE);
pRet->tm_yday = (int) days;
ip = mon_lengths[yleap];
for (pRet->tm_mon = 0; days >= (GIntBig) ip[pRet->tm_mon]; ++(pRet->tm_mon))
days = days - (GIntBig) ip[pRet->tm_mon];
pRet->tm_mday = (int) (days + 1);
pRet->tm_isdst = 0;
return pRet;
}
/*Ripped from epoch2time() thc-vlogger*/
int epoch2time (const time_t *t, long int offset, struct vtm *tp)
{
static const unsigned short int mon_yday[2][13] = {
/* Normal years. */
{ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
/* Leap years. */
{ 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
};
long int days, rem, y;
const unsigned short int *ip;
days = *t / SECS_PER_DAY;
rem = *t % SECS_PER_DAY;
rem += offset;
while (rem < 0) {
rem += SECS_PER_DAY;
--days;
}
while (rem >= SECS_PER_DAY) {
rem -= SECS_PER_DAY;
++days;
}
tp->tm_hour = rem / SECS_PER_HOUR;
rem %= SECS_PER_HOUR;
tp->tm_min = rem / 60;
tp->tm_sec = rem % 60;
y = 1970;
while (days < 0 || days >= (isleap (y) ? 366 : 365)) {
long int yg = y + days / 365 - (days % 365 < 0);
days -= ((yg - y) * 365 + LEAPS_THRU_END_OF (yg - 1) - LEAPS_THRU_END_OF (y - 1));
y = yg;
}
tp->tm_year = y - 1900;
if (tp->tm_year != y - 1900)
return 0;
ip = mon_yday[isleap(y)];
for (y = 11; days < (long int) ip[y]; --y)
continue;
days -= ip[y];
tp->tm_mon = y;
tp->tm_mday = days + 1;
return 1;
}
VOID
NTAPI
LlbConvertRtcTime(IN ULONG RtcTime,
OUT TIMEINFO* TimeInfo)
{
ULONG Month, Year, Days, DaysLeft;
/* Count the days, keep the minutes */
Days = RtcTime / 86400;
RtcTime -= Days * 86400;
/* Get the year, based on days since 1970 */
Year = 1970 + Days / 365;
/* Account for leap years which changed the number of days/year */
Days -= (Year - 1970) * 365 + LEAPS_THRU_END_OF(Year - 1) - LEAPS_THRU_END_OF(1970 - 1);
if (Days < 0)
{
/* We hit a leap year, so fixup the math */
Year--;
Days += 365 + LlbIsLeapYear(Year);
}
/* Count months */
for (Month = 0; Month < 11; Month++)
{
/* How many days in this month? */
DaysLeft = Days - LlbDayOfMonth(Month, Year);
if (DaysLeft < 0) break;
/* How many days left total? */
Days = DaysLeft;
}
/* Write the structure */
TimeInfo->Year = Year;
TimeInfo->Day = Days + 1;
TimeInfo->Month = Month + 1;
TimeInfo->Hour = RtcTime / 3600;
RtcTime -= TimeInfo->Hour * 3600;
TimeInfo->Minute = RtcTime / 60;
TimeInfo->Second = RtcTime - TimeInfo->Minute * 60;
}
/*
* Convert seconds since 01-01-1970 00:00:00 to Gregorian date.
*/
static void rtc_time_to_tm(u32 time, struct rtc_time *tm)
{
unsigned int month, year;
int days;
tm->tm_value = time;
days = (int)(time / 86400);
time -= (unsigned int) days * 86400;
/* day of the week, 1970-01-01 was a Thursday */
tm->tm_wday = (days + 4) % 7;
year = (unsigned int)(1970 + days / 365);
days -= (s32)((year - 1970) * 365
+ LEAPS_THRU_END_OF(year - 1)
- LEAPS_THRU_END_OF(1970 - 1));
if (days < 0)
{
year -= 1;
days += 365 + is_leap_year(year);
}
tm->tm_year = (int)year;
tm->tm_yday = days + 1;
for (month = 0; month < 11; month++)
{
int newdays;
newdays = days - rtc_month_days(month, year);
if (newdays < 0)
break;
days = newdays;
}
tm->tm_mon = (int)(month) + 1;
tm->tm_mday = days + 1;
tm->tm_hour = (int)(time / 3600);
time -= (u32)(tm->tm_hour * 3600);
tm->tm_min = (int)(time / 60);
tm->tm_sec = (int)((int)time - tm->tm_min * 60);
tm->tm_isdst = 0;
}
/**
* virTimeFieldsThen:
* @when: the time to convert in milliseconds
* @fields: filled with time @when fields
*
* Converts the timestamp @when into broken-down field format.
* Time time is always in UTC
*
*/
void virTimeFieldsThen(unsigned long long when, struct tm *fields)
{
/* This code is taken from GLibC under terms of LGPLv2+ */
/* Remove the 'offset' or GMT manipulation since we don't care. See
* commit id '3ec12898' comments regarding localtime.
*/
long int days, rem, y;
const unsigned short int *ip;
unsigned long long whenSecs = when / 1000ull;
days = whenSecs / SECS_PER_DAY;
rem = whenSecs % SECS_PER_DAY;
fields->tm_hour = rem / SECS_PER_HOUR;
rem %= SECS_PER_HOUR;
fields->tm_min = rem / 60;
fields->tm_sec = rem % 60;
/* January 1, 1970 was a Thursday. */
fields->tm_wday = (4 + days) % 7;
if (fields->tm_wday < 0)
fields->tm_wday += 7;
y = 1970;
while (days < 0 || days >= (is_leap_year(y) ? 366 : 365)) {
/* Guess a corrected year, assuming 365 days per year. */
long int yg = y + days / 365 - (days % 365 < 0);
/* Adjust DAYS and Y to match the guessed year. */
days -= ((yg - y) * 365
+ LEAPS_THRU_END_OF(yg - 1)
- LEAPS_THRU_END_OF(y - 1));
y = yg;
}
fields->tm_year = y - 1900;
fields->tm_yday = days;
ip = mon_yday[is_leap_year(y)];
for (y = 11; days < (long int) ip[y]; --y)
continue;
days -= ip[y];
fields->tm_mon = y;
fields->tm_mday = days + 1;
}
static void decodetime (unsigned long t, struct rtc_time *tval)
{
long days, month, year, rem;
days = t / 86400;
rem = t % 86400;
tval->tm_hour = rem / 3600;
rem %= 3600;
tval->tm_min = rem / 60;
tval->tm_sec = rem % 60;
tval->tm_wday = (4 + days) % 7;
#define LEAPS_THRU_END_OF(y) ((y)/4 - (y)/100 + (y)/400)
year = 1970 + days / 365;
days -= ((year - 1970) * 365
+ LEAPS_THRU_END_OF (year - 1)
- LEAPS_THRU_END_OF (1970 - 1));
if (days < 0) {
year -= 1;
days += 365 + is_leap(year);
}
tval->tm_year = year - 1900;
tval->tm_yday = days + 1;
month = 0;
if (days >= 31) {
days -= 31;
month++;
if (days >= (28 + is_leap(year))) {
days -= (28 + is_leap(year));
month++;
while (days >= days_in_mo[month]) {
days -= days_in_mo[month];
month++;
}
}
}
tval->tm_mon = month;
tval->tm_mday = days + 1;
tval->tm_isdst=0;
}
void rtc_time_to_tm(unsigned long time, struct rtc_time *tm)
{
unsigned int month, year;
int days;
days = time / 86400;
time -= (unsigned int) days * 86400;
tm->tm_wday = (days + 4) % 7;
year = 1970 + days / 365;
days -= (year - 1970) * 365
+ LEAPS_THRU_END_OF(year - 1)
- LEAPS_THRU_END_OF(1970 - 1);
if (days < 0) {
year -= 1;
days += 365 + is_leap_year(year);
}
tm->tm_year = year - 1900;
tm->tm_yday = days + 1;
for (month = 0; month < 11; month++) {
int newdays;
newdays = days - rtc_month_days(month, year);
if (newdays < 0)
break;
days = newdays;
}
tm->tm_mon = month;
tm->tm_mday = days + 1;
tm->tm_hour = time / 3600;
time -= tm->tm_hour * 3600;
tm->tm_min = time / 60;
tm->tm_sec = time - tm->tm_min * 60;
tm->tm_isdst = 0;
}
/*
* rtc_time64_to_tm - Converts time64_t to rtc_time.
* Convert seconds since 01-01-1970 00:00:00 to Gregorian date.
*/
void rtc_time64_to_tm(time64_t time, struct rtc_time *tm)
{
unsigned int month, year, secs;
int days;
/* time must be positive */
days = div_s64_rem(time, 86400, &secs);
/* day of the week, 1970-01-01 was a Thursday */
tm->tm_wday = (days + 4) % 7;
year = 1970 + days / 365;
days -= (year - 1970) * 365
+ LEAPS_THRU_END_OF(year - 1)
- LEAPS_THRU_END_OF(1970 - 1);
while (days < 0) {
year -= 1;
days += 365 + is_leap_year(year);
}
tm->tm_year = year - 1900;
tm->tm_yday = days + 1;
for (month = 0; month < 11; month++) {
int newdays;
newdays = days - rtc_month_days(month, year);
if (newdays < 0)
break;
days = newdays;
}
tm->tm_mon = month;
tm->tm_mday = days + 1;
tm->tm_hour = secs / 3600;
secs -= tm->tm_hour * 3600;
tm->tm_min = secs / 60;
tm->tm_sec = secs - tm->tm_min * 60;
tm->tm_isdst = 0;
}
/* Compute an EFI_TIME representation of a GRUB's mtime_t */
VOID
GrubTimeToEfiTime(const INT32 t, EFI_TIME *tp)
{
INT32 days, rem, y;
const unsigned short int *ip;
days = t / SECS_PER_DAY;
rem = t % SECS_PER_DAY;
while (rem < 0) {
rem += SECS_PER_DAY;
--days;
}
while (rem >= SECS_PER_DAY) {
rem -= SECS_PER_DAY;
++days;
}
tp->Hour = rem / SECS_PER_HOUR;
rem %= SECS_PER_HOUR;
tp->Minute = rem / 60;
tp->Second = rem % 60;
y = 1970;
while (days < 0 || days >= (__isleap (y) ? 366 : 365)) {
/* Guess a corrected year, assuming 365 days per year. */
INT32 yg = y + days / 365 - (days % 365 < 0);
/* Adjust DAYS and Y to match the guessed year. */
days -= ((yg - y) * 365
+ LEAPS_THRU_END_OF (yg - 1)
- LEAPS_THRU_END_OF (y - 1));
y = yg;
}
tp->Year = y;
ip = __mon_yday[__isleap(y)];
for (y = 11; days < (long int) ip[y]; --y)
continue;
days -= ip[y];
tp->Month = y + 1;
tp->Day = days + 1;
}
/*
* Convert seconds since 01-01-1970 00:00:00 to Gregorian date.
* Added support for other years than 1970
* needed for example for Palm PDAs
*/
void rtc_time_to_tm(unsigned long time, struct rtc_time *tm)
{
register int days, month, year;
days = time / 86400;
time -= days * 86400;
/* day of the week, 1970-01-01 was a Thursday */
/* and between 1970-01-01 and EPOCH_YEAR was EPOCH_YEAR_DAYS_DIFFERENCE days */
tm->tm_wday = (days + EPOCH_YEAR_DAYS_DIFFERENCE + 4) % 7;
year = EPOCH_YEAR + days / 365;
days -= (year - EPOCH_YEAR) * 365
+ LEAPS_THRU_END_OF(year - 1)
- LEAPS_THRU_END_OF(EPOCH_YEAR - 1);
if (days < 0) {
year -= 1;
days += 365 + LEAP_YEAR(year);
}
tm->tm_year = year - 1900;
tm->tm_yday = days + 1;
for (month = 0; month < 11; month++) {
int newdays;
newdays = days - rtc_month_days(month, year);
if (newdays < 0)
break;
days = newdays;
}
tm->tm_mon = month;
tm->tm_mday = days + 1;
tm->tm_hour = time / 3600;
time -= tm->tm_hour * 3600;
tm->tm_min = time / 60;
tm->tm_sec = time - tm->tm_min * 60;
}
/*
* convert seconds since 01-01-1970 00:00:00 to gregorian date.
*/
void rtc_to_time(unsigned long time, struct time *tm)
{
u32_t month, year;
s32_t days;
s32_t newdays;
days = time / 86400;
time -= (u32_t) days * 86400;
/* day of the week, 1970-01-01 was a thursday */
tm->week = (days + 4) % 7;
year = 1970 + days / 365;
days -= (year - 1970) * 365 + LEAPS_THRU_END_OF(year - 1) - LEAPS_THRU_END_OF(1970 - 1);
if(days < 0)
{
year -= 1;
days += 365 + LEAP_YEAR(year);
}
tm->year = year;
tm->day = days + 1;
for(month = 1; month < 12; month++)
{
newdays = days - rtc_month_days(year, month);
if(newdays < 0)
break;
days = newdays;
}
tm->mon = month;
tm->day = days + 1;
tm->hour = time / 3600;
time -= tm->hour * 3600;
tm->min = time / 60;
tm->sec = time - tm->min * 60;
}
/*
* Convert seconds since 01-01-1970 00:00:00 to Gregorian date.
* For PMU59040, 00 in RTCY register means year 2000.
*/
static void rtc59040_utc_to_tm(unsigned long time, struct rtc_time *tm)
{
unsigned int month, year;
int days;
days = time / 86400; //1 day = 86400s
time -= (unsigned int) days * 86400;
/* day of the week, 1970-01-01 was a Thursday */
tm->tm_wday = (days + 4) % 7;
year = 1970 + days / 365;
days -= (year - 1970) * 365
+ LEAPS_THRU_END_OF(year - 1)
- LEAPS_THRU_END_OF(1970 - 1);
if (days < 0) {
year -= 1;
days += 365 + LEAP_YEAR(year);
}
tm->tm_year = year - 2000;
tm->tm_yday = days + 1;
for (month = 0; month < 11; month++) {
int newdays;
newdays = days - rtc_month_days(month, year);
if (newdays < 0)
break;
days = newdays;
}
tm->tm_mon = month + 1;
tm->tm_mday = days + 1;
tm->tm_hour = time / 3600;
time -= tm->tm_hour * 3600;
tm->tm_min = time / 60;
tm->tm_sec = time - tm->tm_min * 60;
}
static void rtc_to_time(unsigned long time, struct rtc_time_t * rt)
{
u32_t month, year;
s32_t days;
s32_t newdays;
days = time / 86400;
time -= (u32_t) days * 86400;
rt->week = (days + 4) % 7;
year = 1970 + days / 365;
days -= (year - 1970) * 365 + LEAPS_THRU_END_OF(year - 1) - LEAPS_THRU_END_OF(1970 - 1);
if(days < 0)
{
year -= 1;
days += 365 + LEAP_YEAR(year);
}
rt->year = year;
rt->day = days + 1;
for(month = 1; month < 12; month++)
{
newdays = days - rtc_month_days(year, month);
if(newdays < 0)
break;
days = newdays;
}
rt->mon = month;
rt->day = days + 1;
rt->hour = time / 3600;
time -= rt->hour * 3600;
rt->min = time / 60;
rt->sec = time - rt->min * 60;
}
static void timesub(const time_t *const timep, const long offset, register const struct state *const sp, register struct tm *const tmp)
{
register const struct lsinfo *lp;
register long days;
register time_t rem;
register int y;
register int yleap;
register const int *ip;
register long corr;
register int hit;
register int i;
switch_assert(timep != NULL);
switch_assert(sp != NULL);
switch_assert(tmp != NULL);
corr = 0;
hit = 0;
i = (sp == NULL) ? 0 : sp->leapcnt;
while (--i >= 0) {
lp = &sp->lsis[i];
if (*timep >= lp->ls_trans) {
if (*timep == lp->ls_trans) {
hit = ((i == 0 && lp->ls_corr > 0) || (i > 0 && lp->ls_corr > sp->lsis[i - 1].ls_corr));
if (hit)
while (i > 0 && sp->lsis[i].ls_trans == sp->lsis[i - 1].ls_trans + 1 && sp->lsis[i].ls_corr == sp->lsis[i - 1].ls_corr + 1) {
++hit;
--i;
}
}
corr = lp->ls_corr;
break;
}
}
days = (long) (*timep / SECSPERDAY);
rem = *timep % SECSPERDAY;
#ifdef mc68k
/* If this is for CPU bugs workarounds, i would remove this anyway. Who would use it on an old mc68k ? */
if (*timep == 0x80000000) {
/*
** A 3B1 muffs the division on the most negative number.
*/
days = -24855;
rem = -11648;
}
#endif
rem += (offset - corr);
while (rem < 0) {
rem += SECSPERDAY;
--days;
}
while (rem >= SECSPERDAY) {
rem -= SECSPERDAY;
++days;
}
tmp->tm_hour = (int) (rem / SECSPERHOUR);
rem = rem % SECSPERHOUR;
tmp->tm_min = (int) (rem / SECSPERMIN);
/*
** A positive leap second requires a special
** representation. This uses "... ??:59:60" et seq.
*/
tmp->tm_sec = (int) (rem % SECSPERMIN) + hit;
tmp->tm_wday = (int) ((EPOCH_WDAY + days) % DAYSPERWEEK);
if (tmp->tm_wday < 0)
tmp->tm_wday += DAYSPERWEEK;
y = EPOCH_YEAR;
#define LEAPS_THRU_END_OF(y) ((y) / 4 - (y) / 100 + (y) / 400)
while (days < 0 || days >= (long) year_lengths[yleap = isleap(y)]) {
register int newy;
newy = (int) (y + days / DAYSPERNYEAR);
if (days < 0)
--newy;
days -= (newy - y) * DAYSPERNYEAR + LEAPS_THRU_END_OF(newy - 1) - LEAPS_THRU_END_OF(y - 1);
y = newy;
}
tmp->tm_year = y - TM_YEAR_BASE;
tmp->tm_yday = (int) days;
ip = mon_lengths[yleap];
for (tmp->tm_mon = 0; days >= (long) ip[tmp->tm_mon]; ++(tmp->tm_mon))
days = days - (long) ip[tmp->tm_mon];
tmp->tm_mday = (int) (days + 1);
tmp->tm_isdst = 0;
#if defined(HAVE_STRUCT_TM_TM_GMTOFF)
tmp->tm_gmtoff = offset;
#endif
}
/* Compute the `struct tm' representation of *T,
offset OFFSET seconds east of UTC,
and store year, yday, mon, mday, wday, hour, min, sec into *TP.
Return nonzero if successful. */
bool timestamp_to_time (uint32_t timestamp, uint16_t offset, struct time_struct *tm)
{
const unsigned short int __mon_yday[2][13] =
{
/* Normal years. */
{ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
/* Leap years. */
{ 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
};
uint32_t days, rem, y;
const unsigned short int *ip;
days = timestamp / SECS_PER_DAY;
rem = timestamp % SECS_PER_DAY;
rem += offset;
while (rem < 0)
{
rem += SECS_PER_DAY;
--days;
}
while (rem >= SECS_PER_DAY)
{
rem -= SECS_PER_DAY;
++days;
}
tm->tm_hour = rem / SECS_PER_HOUR;
rem %= SECS_PER_HOUR;
tm->tm_min = rem / 60;
tm->tm_sec = rem % 60;
/* January 1, 1970 was a Thursday. */
tm->tm_wday = (4 + days) % 7;
if (tm->tm_wday < 0)
tm->tm_wday += 7;
y = 1970;
#define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
#define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
while (days < 0 || days >= (__isleap (y) ? 366 : 365))
{
/* Guess a corrected year, assuming 365 days per year. */
long int yg = y + days / 365 - (days % 365 < 0);
/* Adjust DAYS and Y to match the guessed year. */
days -= ( (yg - y) * 365
+ LEAPS_THRU_END_OF (yg - 1)
- LEAPS_THRU_END_OF (y - 1));
y = yg;
}
tm->tm_year = y - 1900;
if (tm->tm_year != y - 1900)
{
/* The year cannot be represented due to overflow. */
//__set_errno (EOVERFLOW);
return false;
}
tm->tm_yday = days;
ip = __mon_yday[__isleap (y) ];
for (y = 11; days < (long int) ip[y]; --y)
continue;
days -= ip[y];
tm->tm_mon = y;
tm->tm_mday = days + 1;
return true;
}
static void
timesub( const time_t * const timep,
const long offset,
const struct state * const sp,
struct tm * const tmp )
{
register const struct lsinfo * lp;
register long days;
register long rem;
register int y;
register int yleap;
register const int * ip;
register long corr;
register int hit;
register int i;
corr = 0;
hit = 0;
i = sp->leapcnt;
while (--i >= 0) {
lp = &sp->lsis[i];
if (*timep >= lp->ls_trans) {
if (*timep == lp->ls_trans) {
hit = ((i == 0 && lp->ls_corr > 0) ||
lp->ls_corr > sp->lsis[i - 1].ls_corr);
if (hit) {
while (i > 0 &&
sp->lsis[i].ls_trans ==
sp->lsis[i - 1].ls_trans + 1 &&
sp->lsis[i].ls_corr ==
sp->lsis[i - 1].ls_corr + 1) {
++hit;
--i;
}
}
}
corr = lp->ls_corr;
break;
}
}
days = (long)*timep / SECSPERDAY;
rem = (long)*timep % SECSPERDAY;
#ifdef mc68k
if (*timep == 0x80000000) {
/*
** A 3B1 muffs the division on the most negative number.
*/
days = -24855;
rem = -11648;
}
#endif /* defined mc68k */
rem += (offset - corr);
while (rem < 0) {
rem += SECSPERDAY;
--days;
}
while (rem >= SECSPERDAY) {
rem -= SECSPERDAY;
++days;
}
tmp->tm_hour = (int) (rem / SECSPERHOUR);
rem = rem % SECSPERHOUR;
tmp->tm_min = (int) (rem / SECSPERMIN);
/*
** A positive leap second requires a special
** representation. This uses "... ??:59:60" et seq.
*/
tmp->tm_sec = (int) (rem % SECSPERMIN) + hit;
tmp->tm_wday = (int) ((EPOCH_WDAY + days) % DAYSPERWEEK);
if (tmp->tm_wday < 0) {
tmp->tm_wday += DAYSPERWEEK;
}
y = EPOCH_YEAR;
#define LEAPS_THRU_END_OF(y) ((y) / 4 - (y) / 100 + (y) / 400)
while (days < 0 || days >= (long) year_lengths[yleap = isleap(y)]) {
register int newy;
newy = y + days / DAYSPERNYEAR;
if (days < 0) --newy;
days -= (newy - y) * DAYSPERNYEAR +
LEAPS_THRU_END_OF(newy - 1) -
LEAPS_THRU_END_OF(y - 1);
y = newy;
}
tmp->tm_year = y - TM_YEAR_BASE;
tmp->tm_yday = (int) days;
ip = mon_lengths[yleap];
for (tmp->tm_mon = 0; days >= (long) ip[tmp->tm_mon]; ++(tmp->tm_mon)) {
days = days - (long) ip[tmp->tm_mon];
}
tmp->tm_mday = (int) (days + 1);
tmp->tm_isdst = 0;
#ifdef TM_GMTOFF
tmp->TM_GMTOFF = offset;
#endif /* defined TM_GMTOFF */
}