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https://github.com/jart/cosmopolitan.git
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bb815eafaf
We now have implement all of Musl's localization code, the same way that Musl implements localization. You may need setlocale(LC_ALL, "C.UTF-8"), just in case anything stops working as expected.
47 lines
935 B
C
47 lines
935 B
C
long long __year_to_secs(long long year, int *is_leap)
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{
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if (year-2ULL <= 136) {
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int y = year;
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int leaps = (y-68)>>2;
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if (!((y-68)&3)) {
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leaps--;
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if (is_leap) *is_leap = 1;
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} else if (is_leap) *is_leap = 0;
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return 31536000*(y-70) + 86400*leaps;
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}
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int cycles, centuries, leaps, rem, dummy;
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if (!is_leap) is_leap = &dummy;
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cycles = (year-100) / 400;
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rem = (year-100) % 400;
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if (rem < 0) {
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cycles--;
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rem += 400;
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}
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if (!rem) {
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*is_leap = 1;
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centuries = 0;
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leaps = 0;
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} else {
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if (rem >= 200) {
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if (rem >= 300) centuries = 3, rem -= 300;
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else centuries = 2, rem -= 200;
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} else {
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if (rem >= 100) centuries = 1, rem -= 100;
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else centuries = 0;
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}
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if (!rem) {
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*is_leap = 0;
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leaps = 0;
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} else {
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leaps = rem / 4U;
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rem %= 4U;
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*is_leap = !rem;
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}
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}
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leaps += 97*cycles + 24*centuries - *is_leap;
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return (year-100) * 31536000LL + leaps * 86400LL + 946684800 + 86400;
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}
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