forked from KolibriOS/kolibrios
cde4fa851d
- Formatted by clang-format (WebKit-style). - Removed unnecessary errno linux. - Added KOS error codes. - String functions have been replaced with more optimal ones for x86. - Changed wrappers for 70 sysfunction. git-svn-id: svn://kolibrios.org@9765 a494cfbc-eb01-0410-851d-a64ba20cac60
23 lines
799 B
C
23 lines
799 B
C
#include <time.h>
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time_t mktime(struct tm* timeptr)
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{
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// int utcdiff = -3;
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const int mon_days[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
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unsigned long int tyears, tdays, leaps, utc_hrs;
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int i;
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tyears = timeptr->tm_year - 70; // tm->tm_year is from 1900.
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leaps = (tyears + 2) / 4; // no of next two lines until year 2100.
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i = (timeptr->tm_year - 100) / 100;
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leaps -= ((i / 4) * 3 + i % 4);
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tdays = 0;
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for (i = 0; i < timeptr->tm_mon; i++)
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tdays += mon_days[i];
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tdays += timeptr->tm_mday - 1; // days of month passed.
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tdays = tdays + (tyears * 365) + leaps;
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// utc_hrs = timeptr->tm_hour + utcdiff; // for your time zone.
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return (tdays * 86400) + (timeptr->tm_hour * 3600) + (timeptr->tm_min * 60) + timeptr->tm_sec;
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} |