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29 lines
556 B
C
29 lines
556 B
C
#include <time.h>
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time_t
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mytimegm(struct tm *tm)
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{
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int mon = tm->tm_mon + 1 - 2; /* put March first, Feb last */
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long long year = tm->tm_year + 1900;
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if (mon <= 0 || mon >= 12) {
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int adj = mon / 12;
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mon %= 12;
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if (mon <= 0) {
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adj--;
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mon += 12;
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}
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year += adj;
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}
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time_t t = 0;
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t += tm->tm_sec;
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t += 60 * tm->tm_min;
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t += 60*60 * tm->tm_hour;
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t += 24*60*60 * (tm->tm_mday - 1);
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t += 24*60*60 * (367*mon/12);
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t += 24*60*60 * (year/4 - year/100 + year/400);
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t += 24*60*60 * (365*year - 719498L);
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return t;
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}
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