【完善】格式化 minilibc/time.c
This commit is contained in:
SummerGift
parent
9f300de9cc
commit
e809ced607
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@ -11,20 +11,20 @@
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/* days per month -- nonleap! */
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/* days per month -- nonleap! */
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const short __spm[13] =
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const short __spm[13] =
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{ 0,
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{ 0,
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(31),
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(31),
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(31+28),
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(31 + 28),
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(31+28+31),
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(31 + 28 + 31),
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(31+28+31+30),
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(31 + 28 + 31 + 30),
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(31+28+31+30+31),
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(31 + 28 + 31 + 30 + 31),
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(31+28+31+30+31+30),
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(31 + 28 + 31 + 30 + 31 + 30),
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(31+28+31+30+31+30+31),
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(31 + 28 + 31 + 30 + 31 + 30 + 31),
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(31+28+31+30+31+30+31+31),
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(31 + 28 + 31 + 30 + 31 + 30 + 31 + 31),
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(31+28+31+30+31+30+31+31+30),
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(31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30),
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(31+28+31+30+31+30+31+31+30+31),
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(31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31),
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(31+28+31+30+31+30+31+31+30+31+30),
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(31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30),
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(31+28+31+30+31+30+31+31+30+31+30+31),
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(31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31),
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};
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};
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static long int timezone;
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static long int timezone;
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static const char days[] = "Sun Mon Tue Wed Thu Fri Sat ";
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static const char days[] = "Sun Mon Tue Wed Thu Fri Sat ";
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static const char months[] = "Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec ";
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static const char months[] = "Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec ";
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@ -34,183 +34,183 @@ static const char months[] = "Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec ";
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int __isleap(int year)
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int __isleap(int year)
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{
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{
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/* every fourth year is a leap year except for century years that are
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/* every fourth year is a leap year except for century years that are
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* not divisible by 400. */
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* not divisible by 400. */
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/* return (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0)); */
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/* return (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0)); */
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return (!(year % 4) && ((year % 100) || !(year % 400)));
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return (!(year % 4) && ((year % 100) || !(year % 400)));
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}
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}
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struct tm *gmtime_r(const time_t *timep, struct tm *r)
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struct tm *gmtime_r(const time_t *timep, struct tm *r)
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{
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{
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time_t i;
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time_t i;
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register time_t work = *timep % (SPD);
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register time_t work = *timep % (SPD);
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r->tm_sec = work % 60;
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r->tm_sec = work % 60;
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work /= 60;
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work /= 60;
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r->tm_min = work % 60;
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r->tm_min = work % 60;
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r->tm_hour = work / 60;
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r->tm_hour = work / 60;
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work = *timep / (SPD);
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work = *timep / (SPD);
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r->tm_wday = (4 + work) % 7;
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r->tm_wday = (4 + work) % 7;
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for (i = 1970;; ++i)
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for (i = 1970;; ++i)
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{
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{
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register time_t k = __isleap(i) ? 366 : 365;
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register time_t k = __isleap(i) ? 366 : 365;
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if (work >= k)
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if (work >= k)
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work -= k;
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work -= k;
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else
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else
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break;
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break;
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}
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}
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r->tm_year = i - 1900;
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r->tm_year = i - 1900;
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r->tm_yday = work;
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r->tm_yday = work;
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r->tm_mday = 1;
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r->tm_mday = 1;
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if (__isleap(i) && (work > 58))
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if (__isleap(i) && (work > 58))
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{
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{
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if (work == 59)
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if (work == 59)
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r->tm_mday = 2; /* 29.2. */
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r->tm_mday = 2; /* 29.2. */
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work -= 1;
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work -= 1;
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}
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}
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for (i = 11; i && (__spm[i] > work); --i)
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for (i = 11; i && (__spm[i] > work); --i)
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;
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;
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r->tm_mon = i;
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r->tm_mon = i;
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r->tm_mday += work - __spm[i];
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r->tm_mday += work - __spm[i];
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return r;
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return r;
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}
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}
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struct tm* localtime_r(const time_t* t, struct tm* r)
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struct tm* localtime_r(const time_t* t, struct tm* r)
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{
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{
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time_t tmp;
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time_t tmp;
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struct timezone tz = {0};
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struct timezone tz = {0};
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gettimeofday(0, &tz);
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gettimeofday(0, &tz);
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timezone = tz.tz_minuteswest * 60L;
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timezone = tz.tz_minuteswest * 60L;
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tmp = *t + timezone;
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tmp = *t + timezone;
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return gmtime_r(&tmp, r);
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return gmtime_r(&tmp, r);
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}
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}
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struct tm* localtime(const time_t* t)
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struct tm* localtime(const time_t* t)
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{
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{
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static struct tm tmp;
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static struct tm tmp;
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return localtime_r(t, &tmp);
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return localtime_r(t, &tmp);
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}
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}
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time_t mktime(struct tm * const t)
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time_t mktime(struct tm * const t)
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{
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{
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register time_t day;
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register time_t day;
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register time_t i;
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register time_t i;
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register time_t years = t->tm_year - 70;
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register time_t years = t->tm_year - 70;
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if (t->tm_sec > 60)
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if (t->tm_sec > 60)
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{
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{
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t->tm_min += t->tm_sec / 60;
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t->tm_min += t->tm_sec / 60;
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t->tm_sec %= 60;
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t->tm_sec %= 60;
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}
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}
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if (t->tm_min > 60)
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if (t->tm_min > 60)
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{
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{
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t->tm_hour += t->tm_min / 60;
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t->tm_hour += t->tm_min / 60;
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t->tm_min %= 60;
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t->tm_min %= 60;
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}
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}
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if (t->tm_hour > 24)
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if (t->tm_hour > 24)
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{
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{
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t->tm_mday += t->tm_hour / 24;
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t->tm_mday += t->tm_hour / 24;
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t->tm_hour %= 24;
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t->tm_hour %= 24;
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}
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}
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if (t->tm_mon > 12)
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if (t->tm_mon > 12)
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{
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{
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t->tm_year += t->tm_mon / 12;
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t->tm_year += t->tm_mon / 12;
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t->tm_mon %= 12;
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t->tm_mon %= 12;
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}
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}
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while (t->tm_mday > __spm[1 + t->tm_mon])
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while (t->tm_mday > __spm[1 + t->tm_mon])
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{
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{
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if (t->tm_mon == 1 && __isleap(t->tm_year + 1900))
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if (t->tm_mon == 1 && __isleap(t->tm_year + 1900))
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{
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{
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--t->tm_mday;
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--t->tm_mday;
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}
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}
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t->tm_mday -= __spm[t->tm_mon];
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t->tm_mday -= __spm[t->tm_mon];
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++t->tm_mon;
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++t->tm_mon;
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if (t->tm_mon > 11)
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if (t->tm_mon > 11)
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{
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{
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t->tm_mon = 0;
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t->tm_mon = 0;
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++t->tm_year;
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++t->tm_year;
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}
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}
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}
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}
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if (t->tm_year < 70)
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if (t->tm_year < 70)
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return (time_t) -1;
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return (time_t) - 1;
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/* Days since 1970 is 365 * number of years + number of leap years since 1970 */
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/* Days since 1970 is 365 * number of years + number of leap years since 1970 */
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day = years * 365 + (years + 1) / 4;
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day = years * 365 + (years + 1) / 4;
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/* After 2100 we have to substract 3 leap years for every 400 years
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/* After 2100 we have to substract 3 leap years for every 400 years
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This is not intuitive. Most mktime implementations do not support
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This is not intuitive. Most mktime implementations do not support
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dates after 2059, anyway, so we might leave this out for it's
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dates after 2059, anyway, so we might leave this out for it's
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bloat. */
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bloat. */
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if (years >= 131)
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if (years >= 131)
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{
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{
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years -= 131;
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years -= 131;
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years /= 100;
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years /= 100;
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day -= (years >> 2) * 3 + 1;
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day -= (years >> 2) * 3 + 1;
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if ((years &= 3) == 3)
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if ((years &= 3) == 3)
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years--;
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years--;
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day -= years;
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day -= years;
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}
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}
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day += t->tm_yday = __spm[t->tm_mon] + t->tm_mday - 1 +
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day += t->tm_yday = __spm[t->tm_mon] + t->tm_mday - 1 +
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(__isleap(t->tm_year + 1900) & (t->tm_mon > 1));
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(__isleap(t->tm_year + 1900) & (t->tm_mon > 1));
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/* day is now the number of days since 'Jan 1 1970' */
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/* day is now the number of days since 'Jan 1 1970' */
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i = 7;
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i = 7;
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t->tm_wday = (day + 4) % i; /* Sunday=0, Monday=1, ..., Saturday=6 */
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t->tm_wday = (day + 4) % i; /* Sunday=0, Monday=1, ..., Saturday=6 */
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i = 24;
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i = 24;
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day *= i;
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day *= i;
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i = 60;
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i = 60;
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return ((day + t->tm_hour) * i + t->tm_min) * i + t->tm_sec;
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return ((day + t->tm_hour) * i + t->tm_min) * i + t->tm_sec;
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}
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}
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static void num2str(char *c, int i)
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static void num2str(char *c, int i)
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{
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{
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c[0] = i / 10 + '0';
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c[0] = i / 10 + '0';
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c[1] = i % 10 + '0';
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c[1] = i % 10 + '0';
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}
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}
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char *asctime_r(const struct tm *t, char *buf)
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char *asctime_r(const struct tm *t, char *buf)
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{
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{
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/* "Wed Jun 30 21:49:08 1993\n" */
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/* "Wed Jun 30 21:49:08 1993\n" */
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*(int*) buf = *(int*) (days + (t->tm_wday << 2));
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*(int*) buf = *(int*) (days + (t->tm_wday << 2));
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*(int*) (buf + 4) = *(int*) (months + (t->tm_mon << 2));
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*(int*) (buf + 4) = *(int*) (months + (t->tm_mon << 2));
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num2str(buf + 8, t->tm_mday);
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num2str(buf + 8, t->tm_mday);
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if (buf[8] == '0')
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if (buf[8] == '0')
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buf[8] = ' ';
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buf[8] = ' ';
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buf[10] = ' ';
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buf[10] = ' ';
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num2str(buf + 11, t->tm_hour);
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num2str(buf + 11, t->tm_hour);
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buf[13] = ':';
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buf[13] = ':';
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num2str(buf + 14, t->tm_min);
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num2str(buf + 14, t->tm_min);
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buf[16] = ':';
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buf[16] = ':';
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num2str(buf + 17, t->tm_sec);
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num2str(buf + 17, t->tm_sec);
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buf[19] = ' ';
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buf[19] = ' ';
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num2str(buf + 20, (t->tm_year + 1900) / 100);
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num2str(buf + 20, (t->tm_year + 1900) / 100);
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num2str(buf + 22, (t->tm_year + 1900) % 100);
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num2str(buf + 22, (t->tm_year + 1900) % 100);
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buf[24] = '\n';
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buf[24] = '\n';
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return buf;
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return buf;
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}
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}
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char *asctime(const struct tm *timeptr)
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char *asctime(const struct tm *timeptr)
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{
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{
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static char buf[25];
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static char buf[25];
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return asctime_r(timeptr, buf);
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return asctime_r(timeptr, buf);
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}
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}
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char *ctime(const time_t *timep)
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char *ctime(const time_t *timep)
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{
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{
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return asctime(localtime(timep));
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return asctime(localtime(timep));
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}
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}
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#ifdef RT_USING_DEVICE
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#ifdef RT_USING_DEVICE
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int gettimeofday(struct timeval *tp, void *ignore)
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int gettimeofday(struct timeval *tp, void *ignore)
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{
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{
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time_t time;
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time_t time;
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rt_device_t device;
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rt_device_t device;
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device = rt_device_find("rtc");
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device = rt_device_find("rtc");
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RT_ASSERT(device != RT_NULL);
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RT_ASSERT(device != RT_NULL);
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rt_device_control(device, RT_DEVICE_CTRL_RTC_GET_TIME, &time);
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rt_device_control(device, RT_DEVICE_CTRL_RTC_GET_TIME, &time);
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