Last change
on this file since 373 was 352, checked in by coas-nagasima, 6 years ago |
arm向けASP3版ECNLを追加
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Property svn:eol-style
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Property svn:mime-type
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File size:
931 bytes
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1 | long long __year_to_secs(long long year, int *is_leap)
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2 | {
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3 | if (year-2ULL <= 136) {
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4 | int y = year;
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5 | int leaps = (y-68)>>2;
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6 | if (!((y-68)&3)) {
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7 | leaps--;
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8 | if (is_leap) *is_leap = 1;
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9 | } else if (is_leap) *is_leap = 0;
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10 | return 31536000*(y-70) + 86400*leaps;
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11 | }
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12 |
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13 | int cycles, centuries, leaps, rem;
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14 |
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15 | if (!is_leap) is_leap = &(int){0};
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16 | cycles = (year-100) / 400;
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17 | rem = (year-100) % 400;
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18 | if (rem < 0) {
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19 | cycles--;
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20 | rem += 400;
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21 | }
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22 | if (!rem) {
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23 | *is_leap = 1;
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24 | centuries = 0;
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25 | leaps = 0;
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26 | } else {
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27 | if (rem >= 200) {
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28 | if (rem >= 300) centuries = 3, rem -= 300;
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29 | else centuries = 2, rem -= 200;
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30 | } else {
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31 | if (rem >= 100) centuries = 1, rem -= 100;
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32 | else centuries = 0;
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33 | }
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34 | if (!rem) {
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35 | *is_leap = 0;
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36 | leaps = 0;
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37 | } else {
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38 | leaps = rem / 4U;
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39 | rem %= 4U;
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40 | *is_leap = !rem;
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41 | }
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42 | }
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43 |
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44 | leaps += 97*cycles + 24*centuries - *is_leap;
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45 |
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46 | return (year-100) * 31536000LL + leaps * 86400LL + 946684800 + 86400;
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47 | }
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