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|000027b0| 68 6f 64 0a 09 58 20 2a | 20 69 73 20 76 61 6c 69 |hod..X *| is vali|
|000027c0| 64 20 6f 6e 6c 79 20 66 | 6f 72 20 70 6f 73 69 74 |d only f|or posit|
|000027d0| 69 76 65 20 4a 75 6c 69 | 61 6e 20 64 61 79 20 6e |ive Juli|an day n|
|000027e0| 75 6d 62 65 72 73 2e 0a | 09 58 20 2a 2f 0a 09 58 |umbers..|.X */..X|
|000027f0| 67 72 65 67 6f 72 69 61 | 6e 5f 64 61 74 65 28 70 |gregoria|n_date(p|
|00002800| 5f 64 61 79 2c 20 70 5f | 6d 6f 6e 74 68 2c 20 70 |_day, p_|month, p|
|00002810| 5f 79 65 61 72 2c 20 6a | 64 61 79 29 0a 09 58 09 |_year, j|day)..X.|
|00002820| 69 6e 74 09 2a 70 5f 6d | 6f 6e 74 68 2c 20 2a 70 |int.*p_m|onth, *p|
|00002830| 5f 79 65 61 72 3b 0a 09 | 58 09 64 6f 75 62 6c 65 |_year;..|X.double|
|00002840| 09 2a 70 5f 64 61 79 2c | 20 6a 64 61 79 3b 0a 09 |.*p_day,| jday;..|
|00002850| 58 7b 0a 09 58 09 69 6e | 74 09 61 74 6d 70 2c 20 |X{..X.in|t.atmp, |
|00002860| 62 74 6d 70 2c 20 63 74 | 6d 70 2c 20 64 74 6d 70 |btmp, ct|mp, dtmp|
|00002870| 2c 20 65 74 6d 70 2c 20 | 67 74 6d 70 2c 20 7a 74 |, etmp, |gtmp, zt|
|00002880| 6d 70 3b 0a 09 58 09 64 | 6f 75 62 6c 65 09 66 74 |mp;..X.d|ouble.ft|
|00002890| 6d 70 3b 0a 09 58 0a 09 | 58 09 7a 74 6d 70 20 3d |mp;..X..|X.ztmp =|
|000028a0| 20 6a 64 61 79 20 2b 20 | 30 2e 35 3b 0a 09 58 09 | jday + |0.5;..X.|
|000028b0| 66 74 6d 70 20 3d 20 28 | 6a 64 61 79 20 2b 20 30 |ftmp = (|jday + 0|
|000028c0| 2e 35 29 20 2d 20 7a 74 | 6d 70 3b 0a 09 58 09 69 |.5) - zt|mp;..X.i|
|000028d0| 66 20 28 7a 74 6d 70 20 | 3e 3d 20 32 32 39 39 31 |f (ztmp |>= 22991|
|000028e0| 36 31 29 20 7b 0a 09 58 | 09 09 67 74 6d 70 20 3d |61) {..X|..gtmp =|
|000028f0| 20 28 7a 74 6d 70 20 2d | 20 31 38 36 37 32 31 36 | (ztmp -| 1867216|
|00002900| 2e 32 35 29 20 2f 20 33 | 36 35 32 34 2e 32 35 3b |.25) / 3|6524.25;|
|00002910| 0a 09 58 09 09 63 74 6d | 70 20 3d 20 67 74 6d 70 |..X..ctm|p = gtmp|
|00002920| 20 2f 20 34 3b 0a 09 58 | 09 09 61 74 6d 70 20 3d | / 4;..X|..atmp =|
|00002930| 20 7a 74 6d 70 20 2b 20 | 31 20 2b 20 67 74 6d 70 | ztmp + |1 + gtmp|
|00002940| 20 2d 20 63 74 6d 70 3b | 0a 09 58 09 7d 0a 09 58 | - ctmp;|..X.}..X|
|00002950| 09 65 6c 73 65 0a 09 58 | 09 09 61 74 6d 70 20 3d |.else..X|..atmp =|
|00002960| 20 7a 74 6d 70 3b 0a 09 | 58 09 62 74 6d 70 20 3d | ztmp;..|X.btmp =|
|00002970| 20 61 74 6d 70 20 2b 20 | 31 35 32 34 3b 0a 09 58 | atmp + |1524;..X|
|00002980| 09 63 74 6d 70 20 3d 20 | 28 62 74 6d 70 20 2d 20 |.ctmp = |(btmp - |
|00002990| 31 32 32 2e 31 29 20 2f | 20 33 36 35 2e 32 35 3b |122.1) /| 365.25;|
|000029a0| 0a 09 58 09 64 74 6d 70 | 20 3d 20 33 36 35 2e 32 |..X.dtmp| = 365.2|
|000029b0| 35 20 2a 20 63 74 6d 70 | 3b 0a 09 58 09 65 74 6d |5 * ctmp|;..X.etm|
|000029c0| 70 20 3d 20 28 28 62 74 | 6d 70 20 2d 20 64 74 6d |p = ((bt|mp - dtm|
|000029d0| 70 29 20 2f 20 33 30 2e | 36 30 30 31 29 3b 0a 09 |p) / 30.|6001);..|
|000029e0| 58 09 7a 74 6d 70 20 3d | 20 33 30 2e 36 30 30 31 |X.ztmp =| 30.6001|
|000029f0| 20 2a 20 65 74 6d 70 3b | 0a 09 58 09 2a 70 5f 64 | * etmp;|..X.*p_d|
|00002a00| 61 79 20 3d 20 62 74 6d | 70 20 2d 20 64 74 6d 70 |ay = btm|p - dtmp|
|00002a10| 20 2d 20 7a 74 6d 70 20 | 2b 20 66 74 6d 70 3b 0a | - ztmp |+ ftmp;.|
|00002a20| 09 58 09 69 66 20 28 65 | 74 6d 70 20 3e 20 31 33 |.X.if (e|tmp > 13|
|00002a30| 2e 35 29 0a 09 58 09 09 | 2a 70 5f 6d 6f 6e 74 68 |.5)..X..|*p_month|
|00002a40| 20 3d 20 65 74 6d 70 20 | 2d 20 31 33 3b 0a 09 58 | = etmp |- 13;..X|
|00002a50| 09 65 6c 73 65 0a 09 58 | 09 09 2a 70 5f 6d 6f 6e |.else..X|..*p_mon|
|00002a60| 74 68 20 3d 20 65 74 6d | 70 20 2d 20 31 3b 0a 09 |th = etm|p - 1;..|
|00002a70| 58 09 69 66 20 28 2a 70 | 5f 6d 6f 6e 74 68 20 3e |X.if (*p|_month >|
|00002a80| 20 32 2e 35 29 0a 09 58 | 09 09 2a 70 5f 79 65 61 | 2.5)..X|..*p_yea|
|00002a90| 72 20 3d 20 63 74 6d 70 | 20 2d 20 34 37 31 36 3b |r = ctmp| - 4716;|
|00002aa0| 0a 09 58 09 65 6c 73 65 | 0a 09 58 09 09 2a 70 5f |..X.else|..X..*p_|
|00002ab0| 79 65 61 72 20 3d 20 63 | 74 6d 70 20 2d 20 34 37 |year = c|tmp - 47|
|00002ac0| 31 35 3b 0a 09 58 7d 0a | 09 58 0a 09 58 2f 2a 0a |15;..X}.|.X..X/*.|
|00002ad0| 09 58 20 2a 20 6d 64 61 | 79 73 5f 62 65 74 77 65 |.X * mda|ys_betwe|
|00002ae0| 65 6e 5f 64 61 74 65 73 | 3a 0a 09 58 20 2a 20 43 |en_dates|:..X * C|
|00002af0| 6f 6d 70 75 74 65 20 6e | 75 6d 62 65 72 20 6f 66 |ompute n|umber of|
|00002b00| 20 6d 64 61 79 73 20 62 | 65 74 77 65 65 6e 20 74 | mdays b|etween t|
|00002b10| 77 6f 20 64 61 74 65 73 | 20 28 65 78 63 6c 75 73 |wo dates| (exclus|
|00002b20| 69 76 65 3a 20 64 6f 6e | 27 74 20 63 6f 75 6e 74 |ive: don|'t count|
|00002b30| 20 74 68 65 0a 09 58 20 | 2a 20 64 61 79 73 20 74 | the..X |* days t|
|00002b40| 68 65 6d 73 65 6c 76 65 | 73 29 20 67 69 76 65 6e |hemselve|s) given|
|00002b50| 20 64 61 79 20 6f 66 20 | 77 65 65 6b 20 28 30 2d | day of |week (0-|
|00002b60| 36 2c 20 4f 20 66 6f 72 | 20 53 75 6e 64 61 79 29 |6, O for| Sunday)|
|00002b70| 2c 0a 09 58 20 2a 20 74 | 77 6f 20 73 65 74 73 20 |,..X * t|wo sets |
|00002b80| 6f 66 20 64 61 79 20 28 | 31 2d 33 31 29 2c 20 6d |of day (|1-31), m|
|00002b90| 6f 6e 74 68 20 28 31 2d | 31 32 29 2c 20 79 65 61 |onth (1-|12), yea|
|00002ba0| 72 20 28 31 35 38 33 2d | 39 39 39 39 29 0a 09 58 |r (1583-|9999)..X|
|00002bb0| 20 2a 2f 0a 09 58 6d 64 | 61 79 73 5f 62 65 74 77 | */..Xmd|ays_betw|
|00002bc0| 65 65 6e 5f 64 61 74 65 | 73 28 64 61 79 5f 6f 66 |een_date|s(day_of|
|00002bd0| 5f 77 65 65 6b 2c 20 64 | 61 79 31 2c 20 6d 6f 6e |_week, d|ay1, mon|
|00002be0| 74 68 31 2c 20 79 65 61 | 72 31 2c 20 64 61 79 32 |th1, yea|r1, day2|
|00002bf0| 2c 20 6d 6f 6e 74 68 32 | 2c 20 79 65 61 72 32 29 |, month2|, year2)|
|00002c00| 0a 09 58 09 69 6e 74 09 | 64 61 79 5f 6f 66 5f 77 |..X.int.|day_of_w|
|00002c10| 65 65 6b 2c 20 6d 6f 6e | 74 68 31 2c 20 79 65 61 |eek, mon|th1, yea|
|00002c20| 72 31 2c 20 6d 6f 6e 74 | 68 32 2c 20 79 65 61 72 |r1, mont|h2, year|
|00002c30| 32 3b 0a 09 58 09 64 6f | 75 62 6c 65 09 64 61 79 |2;..X.do|uble.day|
|00002c40| 31 2c 20 64 61 79 32 3b | 0a 09 58 7b 0a 09 58 09 |1, day2;|..X{..X.|
|00002c50| 72 65 74 75 72 6e 20 77 | 64 61 79 28 64 61 79 5f |return w|day(day_|
|00002c60| 6f 66 5f 77 65 65 6b 2c | 20 64 61 79 32 2c 20 6d |of_week,| day2, m|
|00002c70| 6f 6e 74 68 32 2c 20 79 | 65 61 72 32 29 0a 09 58 |onth2, y|ear2)..X|
|00002c80| 09 09 2d 20 77 64 61 79 | 28 64 61 79 5f 6f 66 5f |..- wday|(day_of_|
|00002c90| 77 65 65 6b 2c 20 64 61 | 79 31 2c 20 6d 6f 6e 74 |week, da|y1, mont|
|00002ca0| 68 31 2c 20 79 65 61 72 | 31 29 3b 0a 09 58 7d 0a |h1, year|1);..X}.|
|00002cb0| 09 58 0a 09 58 2f 2a 0a | 09 58 20 2a 20 6e 74 68 |.X..X/*.|.X * nth|
|00002cc0| 5f 6d 64 61 79 5f 6f 66 | 5f 6d 6f 6e 74 68 3a 0a |_mday_of|_month:.|
|00002cd0| 09 58 20 2a 20 43 6f 6d | 70 75 74 65 20 6e 74 68 |.X * Com|pute nth|
|00002ce0| 20 6d 2d 64 61 79 20 6f | 66 20 74 68 65 20 6d 6f | m-day o|f the mo|
|00002cf0| 6e 74 68 20 28 31 2d 33 | 31 29 0a 09 58 20 2a 20 |nth (1-3|1)..X * |
|00002d00| 67 69 76 65 6e 20 6e 20 | 28 31 2d 35 29 2c 20 64 |given n |(1-5), d|
|00002d10| 61 79 20 6f 66 20 77 65 | 65 6b 20 28 30 2d 36 2c |ay of we|ek (0-6,|
|00002d20| 20 30 20 66 6f 72 20 53 | 75 6e 64 61 79 29 2c 20 | 0 for S|unday), |
|00002d30| 6d 6f 6e 74 68 20 28 31 | 2d 31 32 29 2c 0a 09 58 |month (1|-12),..X|
|00002d40| 20 2a 20 79 65 61 72 20 | 28 31 35 38 33 2d 39 39 | * year |(1583-99|
|00002d50| 39 39 29 0a 09 58 20 2a | 2f 0a 09 58 64 6f 75 62 |99)..X *|/..Xdoub|
|00002d60| 6c 65 0a 09 58 6e 74 68 | 5f 6d 64 61 79 5f 6f 66 |le..Xnth|_mday_of|
|00002d70| 5f 6d 6f 6e 74 68 28 6e | 2c 20 64 61 79 5f 6f 66 |_month(n|, day_of|
|00002d80| 5f 77 65 65 6b 2c 20 6d | 6f 6e 74 68 2c 20 79 65 |_week, m|onth, ye|
|00002d90| 61 72 29 0a 09 58 09 69 | 6e 74 09 64 61 79 5f 6f |ar)..X.i|nt.day_o|
|00002da0| 66 5f 77 65 65 6b 2c 20 | 6d 6f 6e 74 68 2c 20 6e |f_week, |month, n|
|00002db0| 2c 20 79 65 61 72 3b 0a | 09 58 7b 0a 09 58 09 69 |, year;.|.X{..X.i|
|00002dc0| 6e 74 09 61 74 6d 70 2c | 20 62 74 6d 70 2c 20 63 |nt.atmp,| btmp, c|
|00002dd0| 74 6d 70 2c 20 64 74 6d | 70 2c 20 65 74 6d 70 2c |tmp, dtm|p, etmp,|
|00002de0| 20 66 74 6d 70 2c 20 74 | 6d 6f 6e 74 68 2c 20 74 | ftmp, t|month, t|
|00002df0| 79 65 61 72 3b 0a 09 58 | 0a 09 58 09 69 66 20 28 |year;..X|..X.if (|
|00002e00| 6d 6f 6e 74 68 20 3e 20 | 32 29 20 7b 0a 09 58 09 |month > |2) {..X.|
|00002e10| 09 74 6d 6f 6e 74 68 20 | 3d 20 6d 6f 6e 74 68 20 |.tmonth |= month |
|00002e20| 2b 20 31 3b 0a 09 58 09 | 09 74 79 65 61 72 20 3d |+ 1;..X.|.tyear =|
|00002e30| 20 79 65 61 72 3b 0a 09 | 58 09 7d 0a 09 58 09 65 | year;..|X.}..X.e|
|00002e40| 6c 73 65 20 7b 0a 09 58 | 09 09 74 6d 6f 6e 74 68 |lse {..X|..tmonth|
|00002e50| 20 3d 20 6d 6f 6e 74 68 | 20 2b 20 31 33 3b 0a 09 | = month| + 13;..|
|00002e60| 58 09 09 74 79 65 61 72 | 20 3d 20 79 65 61 72 20 |X..tyear| = year |
|00002e70| 2d 20 31 3b 0a 09 58 09 | 7d 0a 09 58 09 61 74 6d |- 1;..X.|}..X.atm|
|00002e80| 70 20 3d 20 32 2e 36 20 | 2a 20 74 6d 6f 6e 74 68 |p = 2.6 |* tmonth|
|00002e90| 3b 0a 09 58 09 62 74 6d | 70 20 3d 20 31 2e 32 35 |;..X.btm|p = 1.25|
|00002ea0| 20 2a 20 74 79 65 61 72 | 3b 0a 09 58 09 63 74 6d | * tyear|;..X.ctm|
|00002eb0| 70 20 3d 20 28 74 79 65 | 61 72 20 2f 20 31 30 30 |p = (tye|ar / 100|
|00002ec0| 29 20 2d 20 37 3b 0a 09 | 58 09 64 74 6d 70 20 3d |) - 7;..|X.dtmp =|
|00002ed0| 20 30 2e 37 35 20 2a 20 | 63 74 6d 70 3b 0a 09 58 | 0.75 * |ctmp;..X|
|00002ee0| 09 65 74 6d 70 20 3d 20 | 28 64 61 79 5f 6f 66 5f |.etmp = |(day_of_|
|00002ef0| 77 65 65 6b 20 2d 20 61 | 74 6d 70 20 2d 20 62 74 |week - a|tmp - bt|
|00002f00| 6d 70 20 2b 20 64 74 6d | 70 29 20 25 20 37 3b 0a |mp + dtm|p) % 7;.|
|00002f10| 09 58 09 69 66 20 28 65 | 74 6d 70 20 3d 3d 20 30 |.X.if (e|tmp == 0|
|00002f20| 29 0a 09 58 09 09 66 74 | 6d 70 20 3d 20 37 3b 0a |)..X..ft|mp = 7;.|
|00002f30| 09 58 09 65 6c 73 65 0a | 09 58 09 09 66 74 6d 70 |.X.else.|.X..ftmp|
|00002f40| 20 3d 20 65 74 6d 70 3b | 0a 09 58 09 72 65 74 75 | = etmp;|..X.retu|
|00002f50| 72 6e 20 28 64 6f 75 62 | 6c 65 29 20 28 66 74 6d |rn (doub|le) (ftm|
|00002f60| 70 20 2b 20 28 6e 20 2a | 20 37 29 29 3b 0a 09 58 |p + (n *| 7));..X|
|00002f70| 7d 0a 09 58 0a 09 58 2f | 2a 0a 09 58 20 2a 20 79 |}..X..X/|*..X * y|
|00002f80| 65 61 72 73 5f 64 61 74 | 65 5f 69 73 5f 6d 64 61 |ears_dat|e_is_mda|
|00002f90| 79 3a 0a 09 58 20 2a 20 | 43 6f 6d 70 75 74 65 20 |y:..X * |Compute |
|00002fa0| 79 65 61 72 28 73 29 20 | 66 6f 72 20 77 68 69 63 |year(s) |for whic|
|00002fb0| 68 20 61 20 67 69 76 65 | 6e 20 64 61 74 65 20 69 |h a give|n date i|
|00002fc0| 73 20 61 6e 20 6d 2d 64 | 61 79 0a 09 58 20 2a 20 |s an m-d|ay..X * |
|00002fd0| 67 69 76 65 6e 20 73 74 | 61 72 74 69 6e 67 20 79 |given st|arting y|
|00002fe0| 65 61 72 2c 20 65 6e 64 | 69 6e 67 20 79 65 61 72 |ear, end|ing year|
|00002ff0| 2c 0a 09 58 20 2a 20 64 | 61 79 20 6f 66 20 77 65 |,..X * d|ay of we|
|00003000| 65 6b 20 28 30 2d 36 2c | 20 30 20 66 6f 72 20 53 |ek (0-6,| 0 for S|
|00003010| 75 6e 64 61 79 29 2c 20 | 64 61 79 2c 20 61 6e 64 |unday), |day, and|
|00003020| 20 6d 6f 6e 74 68 0a 09 | 58 20 2a 20 61 6c 67 6f | month..|X * algo|
|00003030| 72 69 74 68 6d 20 73 61 | 69 64 20 74 6f 20 62 65 |rithm sa|id to be|
|00003040| 20 76 61 6c 69 64 20 66 | 6f 72 20 31 20 4d 61 72 | valid f|or 1 Mar|
|00003050| 20 31 39 30 30 20 74 6f | 20 32 38 20 46 65 62 20 | 1900 to| 28 Feb |
|00003060| 32 31 30 30 2e 0a 09 58 | 20 2a 2f 0a 09 58 79 65 |2100...X| */..Xye|
|00003070| 61 72 73 5f 64 61 74 65 | 5f 69 73 5f 6d 64 61 79 |ars_date|_is_mday|
|00003080| 28 64 61 79 5f 6f 66 5f | 77 65 65 6b 2c 20 64 61 |(day_of_|week, da|
|00003090| 79 2c 20 6d 6f 6e 74 68 | 2c 20 73 74 61 72 74 5f |y, month|, start_|
|000030a0| 79 65 61 72 2c 20 65 6e | 64 5f 79 65 61 72 2c 20 |year, en|d_year, |
|000030b0| 79 65 61 72 6c 69 73 74 | 2c 0a 09 58 09 6e 75 6d |yearlist|,..X.num|
|000030c0| 62 65 72 5f 6f 66 5f 79 | 65 61 72 73 29 0a 09 58 |ber_of_y|ears)..X|
|000030d0| 09 69 6e 74 09 64 61 79 | 5f 6f 66 5f 77 65 65 6b |.int.day|_of_week|
|000030e0| 2c 20 65 6e 64 5f 79 65 | 61 72 2c 20 6d 6f 6e 74 |, end_ye|ar, mont|
|000030f0| 68 2c 20 2a 6e 75 6d 62 | 65 72 5f 6f 66 5f 79 65 |h, *numb|er_of_ye|
|00003100| 61 72 73 2c 20 79 65 61 | 72 6c 69 73 74 5b 5d 2c |ars, yea|rlist[],|
|00003110| 0a 09 58 09 09 73 74 61 | 72 74 5f 79 65 61 72 3b |..X..sta|rt_year;|
|00003120| 0a 09 58 09 64 6f 75 62 | 6c 65 09 64 61 79 3b 0a |..X.doub|le.day;.|
|00003130| 09 58 7b 0a 09 58 09 69 | 6e 74 09 09 64 69 66 66 |.X{..X.i|nt..diff|
|00003140| 2c 20 69 6e 64 65 78 2c | 20 79 65 61 72 2c 20 74 |, index,| year, t|
|00003150| 64 6f 77 3b 0a 09 58 09 | 73 74 61 74 69 63 20 69 |dow;..X.|static i|
|00003160| 6e 74 09 61 75 67 6d 65 | 6e 74 5b 5d 20 3d 20 7b |nt.augme|nt[] = {|
|00003170| 36 2c 20 31 31 2c 20 36 | 2c 20 35 7d 3b 20 0a 09 |6, 11, 6|, 5}; ..|
|00003180| 58 0a 09 58 09 2a 6e 75 | 6d 62 65 72 5f 6f 66 5f |X..X.*nu|mber_of_|
|00003190| 79 65 61 72 73 20 3d 20 | 30 3b 0a 09 58 09 69 66 |years = |0;..X.if|
|000031a0| 20 28 73 74 61 72 74 5f | 79 65 61 72 20 3e 20 65 | (start_|year > e|
|000031b0| 6e 64 5f 79 65 61 72 29 | 20 72 65 74 75 72 6e 20 |nd_year)| return |
|000031c0| 2d 31 3b 0a 09 58 09 66 | 6f 72 20 28 79 65 61 72 |-1;..X.f|or (year|
|000031d0| 20 3d 20 73 74 61 72 74 | 5f 79 65 61 72 3b 20 79 | = start|_year; y|
|000031e0| 65 61 72 20 3c 3d 20 65 | 6e 64 5f 79 65 61 72 3b |ear <= e|nd_year;|
|000031f0| 20 79 65 61 72 2b 2b 20 | 29 20 7b 0a 09 58 09 09 | year++ |) {..X..|
|00003200| 74 64 6f 77 20 3d 20 67 | 65 74 5f 64 61 79 5f 6f |tdow = g|et_day_o|
|00003210| 66 5f 77 65 65 6b 28 64 | 61 79 2c 20 6d 6f 6e 74 |f_week(d|ay, mont|
|00003220| 68 2c 20 79 65 61 72 29 | 3b 0a 09 58 09 09 69 66 |h, year)|;..X..if|
|00003230| 20 28 74 64 6f 77 20 3d | 3d 20 64 61 79 5f 6f 66 | (tdow =|= day_of|
|00003240| 5f 77 65 65 6b 29 20 7b | 0a 09 58 09 09 09 79 65 |_week) {|..X...ye|
|00003250| 61 72 6c 69 73 74 5b 28 | 2a 6e 75 6d 62 65 72 5f |arlist[(|*number_|
|00003260| 6f 66 5f 79 65 61 72 73 | 29 2b 2b 5d 20 3d 20 79 |of_years|)++] = y|
|00003270| 65 61 72 3b 0a 09 58 09 | 09 7d 0a 09 58 09 09 69 |ear;..X.|.}..X..i|
|00003280| 66 20 28 2a 6e 75 6d 62 | 65 72 5f 6f 66 5f 79 65 |f (*numb|er_of_ye|
|00003290| 61 72 73 20 3d 3d 20 32 | 20 7c 7c 20 2a 6e 75 6d |ars == 2| || *num|
|000032a0| 62 65 72 5f 6f 66 5f 79 | 65 61 72 73 20 3d 3d 20 |ber_of_y|ears == |
|000032b0| 33 29 20 7b 0a 09 58 09 | 09 09 64 69 66 66 20 3d |3) {..X.|..diff =|
|000032c0| 20 79 65 61 72 6c 69 73 | 74 5b 2a 6e 75 6d 62 65 | yearlis|t[*numbe|
|000032d0| 72 5f 6f 66 5f 79 65 61 | 72 73 5d 0a 09 58 09 09 |r_of_yea|rs]..X..|
|000032e0| 09 09 2d 20 79 65 61 72 | 6c 69 73 74 5b 2a 6e 75 |..- year|list[*nu|
|000032f0| 6d 62 65 72 5f 6f 66 5f | 79 65 61 72 73 20 2d 20 |mber_of_|years - |
|00003300| 31 5d 3b 0a 09 58 09 09 | 09 69 66 20 28 64 69 66 |1];..X..|.if (dif|
|00003310| 66 20 3d 3d 20 35 29 20 | 7b 0a 09 58 09 09 09 09 |f == 5) |{..X....|
|00003320| 79 65 61 72 2b 2b 3b 0a | 09 58 09 09 09 09 69 6e |year++;.|.X....in|
|00003330| 64 65 78 20 3d 20 30 3b | 0a 09 58 09 09 09 09 62 |dex = 0;|..X....b|
|00003340| 72 65 61 6b 3b 0a 09 58 | 09 09 09 7d 0a 09 58 09 |reak;..X|...}..X.|
|00003350| 09 09 65 6c 73 65 20 69 | 66 20 28 64 69 66 66 20 |..else i|f (diff |
|00003360| 3d 3d 20 31 31 29 20 7b | 0a 09 58 09 09 09 09 79 |== 11) {|..X....y|
|00003370| 65 61 72 2b 2b 3b 0a 09 | 58 09 09 09 09 69 6e 64 |ear++;..|X....ind|
|00003380| 65 78 20 3d 20 32 3b 0a | 09 58 09 09 09 09 62 72 |ex = 2;.|.X....br|
|00003390| 65 61 6b 3b 0a 09 58 09 | 09 09 7d 0a 09 58 09 09 |eak;..X.|..}..X..|
|000033a0| 7d 0a 09 58 09 7d 0a 09 | 58 09 66 6f 72 20 28 20 |}..X.}..|X.for ( |
|000033b0| 3b 20 79 65 61 72 20 3c | 3d 20 65 6e 64 5f 79 65 |; year <|= end_ye|
|000033c0| 61 72 3b 20 79 65 61 72 | 2b 2b 20 29 20 7b 0a 09 |ar; year|++ ) {..|
|000033d0| 58 09 09 79 65 61 72 6c | 69 73 74 5b 28 2a 6e 75 |X..yearl|ist[(*nu|
|000033e0| 6d 62 65 72 5f 6f 66 5f | 79 65 61 72 73 20 2b 20 |mber_of_|years + |
|000033f0| 31 29 5d 20 3d 0a 09 58 | 09 09 09 79 65 61 72 6c |1)] =..X|...yearl|
|00003400| 69 73 74 5b 2a 6e 75 6d | 62 65 72 5f 6f 66 5f 79 |ist[*num|ber_of_y|
|00003410| 65 61 72 73 5d 20 2b 20 | 61 75 67 6d 65 6e 74 5b |ears] + |augment[|
|00003420| 69 6e 64 65 78 2b 2b 20 | 25 20 34 5d 3b 0a 09 58 |index++ |% 4];..X|
|00003430| 09 09 28 2a 6e 75 6d 62 | 65 72 5f 6f 66 5f 79 65 |..(*numb|er_of_ye|
|00003440| 61 72 73 29 2b 2b 3b 0a | 09 58 09 7d 0a 09 58 09 |ars)++;.|.X.}..X.|
|00003450| 72 65 74 75 72 6e 20 30 | 3b 0a 09 58 7d 0a 09 58 |return 0|;..X}..X|
|00003460| 0a 09 58 2f 2a 0a 09 58 | 20 2a 20 77 65 65 6b 64 |..X/*..X| * weekd|
|00003470| 61 79 73 5f 62 65 74 77 | 65 65 6e 5f 64 61 74 65 |ays_betw|een_date|
|00003480| 73 3a 0a 09 58 20 2a 20 | 43 6f 6d 70 75 74 65 20 |s:..X * |Compute |
|00003490| 77 65 65 6b 64 61 79 73 | 20 62 65 74 77 65 65 6e |weekdays| between|
|000034a0| 20 61 6e 79 20 74 77 6f | 20 64 61 74 65 73 0a 09 | any two| dates..|
|000034b0| 58 20 2a 20 67 69 76 65 | 6e 20 74 77 6f 20 73 65 |X * give|n two se|
|000034c0| 74 73 20 6f 66 20 64 61 | 79 20 28 31 2d 33 31 29 |ts of da|y (1-31)|
|000034d0| 2c 20 6d 6f 6e 74 68 20 | 28 31 2d 31 32 29 2c 20 |, month |(1-12), |
|000034e0| 79 65 61 72 20 28 31 39 | 30 31 2d 32 30 30 39 29 |year (19|01-2009)|
|000034f0| 0a 09 58 20 2a 2f 0a 09 | 58 77 65 65 6b 64 61 79 |..X */..|Xweekday|
|00003500| 73 5f 62 65 74 77 65 65 | 6e 5f 64 61 74 65 73 28 |s_betwee|n_dates(|
|00003510| 64 61 79 31 2c 20 6d 6f | 6e 74 68 31 2c 20 79 65 |day1, mo|nth1, ye|
|00003520| 61 72 31 2c 20 64 61 79 | 32 2c 20 6d 6f 6e 74 68 |ar1, day|2, month|
|00003530| 32 2c 20 79 65 61 72 32 | 29 0a 09 58 09 69 6e 74 |2, year2|)..X.int|
|00003540| 09 6d 6f 6e 74 68 31 2c | 20 6d 6f 6e 74 68 32 2c |.month1,| month2,|
|00003550| 20 79 65 61 72 31 2c 20 | 79 65 61 72 32 3b 0a 09 | year1, |year2;..|
|00003560| 58 09 64 6f 75 62 6c 65 | 09 64 61 79 31 2c 20 64 |X.double|.day1, d|
|00003570| 61 79 32 3b 0a 09 58 7b | 0a 09 58 09 72 65 74 75 |ay2;..X{|..X.retu|
|00003580| 72 6e 20 77 64 61 79 32 | 28 64 61 79 32 2c 20 6d |rn wday2|(day2, m|
|00003590| 6f 6e 74 68 32 2c 20 79 | 65 61 72 32 29 20 2d 20 |onth2, y|ear2) - |
|000035a0| 77 64 61 79 32 28 64 61 | 79 31 2c 20 6d 6f 6e 74 |wday2(da|y1, mont|
|000035b0| 68 31 2c 20 79 65 61 72 | 31 29 3b 0a 09 58 7d 0a |h1, year|1);..X}.|
|000035c0| 09 58 0a 09 58 2f 2a 0a | 09 58 20 2a 20 77 64 61 |.X..X/*.|.X * wda|
|000035d0| 79 3a 0a 09 58 20 2a 20 | 43 6f 6d 70 75 74 65 20 |y:..X * |Compute |
|000035e0| 77 64 61 79 20 66 6f 72 | 20 6d 64 61 79 73 5f 62 |wday for| mdays_b|
|000035f0| 65 74 77 65 65 6e 5f 64 | 61 74 65 73 20 72 6f 75 |etween_d|ates rou|
|00003600| 74 69 6e 65 0a 09 58 20 | 2a 20 67 69 76 65 6e 20 |tine..X |* given |
|00003610| 64 61 79 20 6f 66 20 77 | 65 65 6b 2c 20 64 61 79 |day of w|eek, day|
|00003620| 2c 20 6d 6f 6e 74 68 2c | 20 79 65 61 72 0a 09 58 |, month,| year..X|
|00003630| 20 2a 2f 0a 09 58 77 64 | 61 79 28 64 61 79 5f 6f | */..Xwd|ay(day_o|
|00003640| 66 5f 77 65 65 6b 2c 20 | 64 61 79 2c 20 6d 6f 6e |f_week, |day, mon|
|00003650| 74 68 2c 20 79 65 61 72 | 29 0a 09 58 09 69 6e 74 |th, year|)..X.int|
|00003660| 09 64 61 79 5f 6f 66 5f | 77 65 65 6b 2c 20 6d 6f |.day_of_|week, mo|
|00003670| 6e 74 68 2c 20 79 65 61 | 72 3b 0a 09 58 09 64 6f |nth, yea|r;..X.do|
|00003680| 75 62 6c 65 09 64 61 79 | 3b 0a 09 58 7b 0a 09 58 |uble.day|;..X{..X|
|00003690| 09 69 6e 74 09 61 74 6d | 70 2c 20 62 74 6d 70 2c |.int.atm|p, btmp,|
|000036a0| 20 63 74 6d 70 2c 20 64 | 74 6d 70 3b 0a 09 58 0a | ctmp, d|tmp;..X.|
|000036b0| 09 58 09 61 74 6d 70 20 | 3d 20 64 64 61 79 28 64 |.X.atmp |= dday(d|
|000036c0| 61 79 2c 20 6d 6f 6e 74 | 68 2c 20 79 65 61 72 29 |ay, mont|h, year)|
|000036d0| 20 2d 20 64 61 79 5f 6f | 66 5f 77 65 65 6b 3b 0a | - day_o|f_week;.|
|000036e0| 09 58 09 62 74 6d 70 20 | 3d 20 61 74 6d 70 20 2f |.X.btmp |= atmp /|
|000036f0| 20 37 3b 0a 09 58 09 63 | 74 6d 70 20 3d 20 61 74 | 7;..X.c|tmp = at|
|00003700| 6d 70 20 25 20 37 3b 0a | 09 58 09 64 74 6d 70 20 |mp % 7;.|.X.dtmp |
|00003710| 3d 20 30 2e 31 31 20 2a | 20 63 74 6d 70 20 2b 20 |= 0.11 *| ctmp + |
|00003720| 30 2e 39 3b 0a 09 58 09 | 72 65 74 75 72 6e 20 62 |0.9;..X.|return b|
|00003730| 74 6d 70 20 2b 20 28 30 | 2e 35 20 2a 20 64 74 6d |tmp + (0|.5 * dtm|
|00003740| 70 29 3b 0a 09 58 7d 0a | 09 58 0a 09 58 2f 2a 0a |p);..X}.|.X..X/*.|
|00003750| 09 58 20 2a 20 77 64 61 | 79 32 3a 0a 09 58 20 2a |.X * wda|y2:..X *|
|00003760| 20 43 6f 6d 70 75 74 65 | 20 77 64 61 79 32 20 66 | Compute| wday2 f|
|00003770| 6f 72 20 77 65 65 6b 64 | 61 79 73 5f 62 65 74 77 |or weekd|ays_betw|
|00003780| 65 65 6e 5f 64 61 74 65 | 73 20 72 6f 75 74 69 6e |een_date|s routin|
|00003790| 65 0a 09 58 20 2a 20 67 | 69 76 65 6e 20 64 61 79 |e..X * g|iven day|
|000037a0| 2c 20 6d 6f 6e 74 68 2c | 20 79 65 61 72 0a 09 58 |, month,| year..X|
|000037b0| 20 2a 2f 0a 09 58 77 64 | 61 79 32 28 64 61 79 2c | */..Xwd|ay2(day,|
|000037c0| 20 6d 6f 6e 74 68 2c 20 | 79 65 61 72 29 0a 09 58 | month, |year)..X|
|000037d0| 09 69 6e 74 09 6d 6f 6e | 74 68 2c 20 79 65 61 72 |.int.mon|th, year|
|000037e0| 3b 0a 09 58 09 64 6f 75 | 62 6c 65 09 64 61 79 3b |;..X.dou|ble.day;|
|000037f0| 0a 09 58 7b 0a 09 58 09 | 69 6e 74 09 61 74 6d 70 |..X{..X.|int.atmp|
|00003800| 2c 20 62 74 6d 70 2c 20 | 63 74 6d 70 2c 20 64 74 |, btmp, |ctmp, dt|
|00003810| 6d 70 3b 0a 09 58 0a 09 | 58 09 61 74 6d 70 20 3d |mp;..X..|X.atmp =|
|00003820| 20 64 64 61 79 28 64 61 | 79 2c 20 6d 6f 6e 74 68 | dday(da|y, month|
|00003830| 2c 20 79 65 61 72 29 3b | 0a 09 58 09 62 74 6d 70 |, year);|..X.btmp|
|00003840| 20 3d 20 61 74 6d 70 20 | 2f 20 37 3b 0a 09 58 09 | = atmp |/ 7;..X.|
|00003850| 63 74 6d 70 20 3d 20 61 | 74 6d 70 20 25 20 37 3b |ctmp = a|tmp % 7;|
|00003860| 0a 09 58 09 64 74 6d 70 | 20 3d 20 31 2e 38 30 31 |..X.dtmp| = 1.801|
|00003870| 20 2a 20 63 74 6d 70 3b | 0a 09 58 09 72 65 74 75 | * ctmp;|..X.retu|
|00003880| 72 6e 20 28 35 20 2a 20 | 62 74 6d 70 29 20 2b 20 |rn (5 * |btmp) + |
|00003890| 28 30 2e 35 20 2a 20 64 | 74 6d 70 29 3b 0a 09 58 |(0.5 * d|tmp);..X|
|000038a0| 7d 0a 09 58 0a 09 58 2f | 2a 0a 09 58 20 2a 20 64 |}..X..X/|*..X * d|
|000038b0| 64 61 79 3a 0a 09 58 20 | 2a 20 43 6f 6d 70 75 74 |day:..X |* Comput|
|000038c0| 65 20 64 64 61 79 20 66 | 6f 72 20 6f 74 68 65 72 |e dday f|or other|
|000038d0| 20 72 6f 75 74 69 6e 65 | 73 0a 09 58 20 2a 20 67 | routine|s..X * g|
|000038e0| 69 76 65 6e 20 64 61 79 | 20 28 31 2d 33 31 29 2c |iven day| (1-31),|
|000038f0| 20 6d 6f 6e 74 68 20 28 | 31 2d 31 32 29 2c 20 79 | month (|1-12), y|
|00003900| 65 61 72 20 28 31 39 30 | 31 2d 32 30 30 39 29 0a |ear (190|1-2009).|
|00003910| 09 58 20 2a 2f 0a 09 58 | 64 64 61 79 28 64 61 79 |.X */..X|dday(day|
|00003920| 2c 20 6d 6f 6e 74 68 2c | 20 79 65 61 72 29 0a 09 |, month,| year)..|
|00003930| 58 09 69 6e 74 09 6d 6f | 6e 74 68 2c 20 79 65 61 |X.int.mo|nth, yea|
|00003940| 72 3b 0a 09 58 09 64 6f | 75 62 6c 65 09 64 61 79 |r;..X.do|uble.day|
|00003950| 3b 0a 09 58 7b 0a 09 58 | 09 69 6e 74 09 61 74 6d |;..X{..X|.int.atm|
|00003960| 70 2c 20 62 74 6d 70 2c | 20 63 74 6d 70 2c 20 64 |p, btmp,| ctmp, d|
|00003970| 74 6d 70 2c 20 74 6d 6f | 6e 74 68 2c 20 74 79 65 |tmp, tmo|nth, tye|
|00003980| 61 72 3b 0a 09 58 0a 09 | 58 09 69 66 20 28 6d 6f |ar;..X..|X.if (mo|
|00003990| 6e 74 68 20 3e 20 32 29 | 20 7b 0a 09 58 09 09 74 |nth > 2)| {..X..t|
|000039a0| 6d 6f 6e 74 68 20 3d 20 | 6d 6f 6e 74 68 20 2b 20 |month = |month + |
|000039b0| 31 3b 0a 09 58 09 09 74 | 79 65 61 72 20 3d 20 79 |1;..X..t|year = y|
|000039c0| 65 61 72 3b 0a 09 58 09 | 7d 0a 09 58 09 65 6c 73 |ear;..X.|}..X.els|
|000039d0| 65 20 7b 0a 09 58 09 09 | 74 6d 6f 6e 74 68 20 3d |e {..X..|tmonth =|
|000039e0| 20 6d 6f 6e 74 68 20 2b | 20 31 33 3b 0a 09 58 09 | month +| 13;..X.|
|000039f0| 09 74 79 65 61 72 20 3d | 20 79 65 61 72 20 2d 20 |.tyear =| year - |
|00003a00| 31 3b 0a 09 58 09 7d 0a | 09 58 09 61 74 6d 70 20 |1;..X.}.|.X.atmp |
|00003a10| 3d 20 74 79 65 61 72 20 | 2f 20 31 30 30 3b 0a 09 |= tyear |/ 100;..|
|00003a20| 58 09 62 74 6d 70 20 3d | 20 30 2e 37 35 20 2a 20 |X.btmp =| 0.75 * |
|00003a30| 28 61 74 6d 70 20 2d 20 | 37 29 3b 0a 09 58 09 63 |(atmp - |7);..X.c|
|00003a40| 74 6d 70 20 3d 20 33 36 | 35 2e 32 35 20 2a 20 74 |tmp = 36|5.25 * t|
|00003a50| 79 65 61 72 3b 0a 09 58 | 09 64 74 6d 70 20 3d 20 |year;..X|.dtmp = |
|00003a60| 33 30 2e 36 30 30 31 20 | 2a 20 74 6d 6f 6e 74 68 |30.6001 |* tmonth|
|00003a70| 3b 0a 09 58 09 72 65 74 | 75 72 6e 20 28 69 6e 74 |;..X.ret|urn (int|
|00003a80| 29 20 64 61 79 20 2d 20 | 62 74 6d 70 20 2b 20 63 |) day - |btmp + c|
|00003a90| 74 6d 70 20 2b 20 64 74 | 6d 70 3b 0a 09 58 7d 0a |tmp + dt|mp;..X}.|
|00003aa0| 09 58 0a 09 58 2f 2a 0a | 09 58 20 2a 20 76 65 72 |.X..X/*.|.X * ver|
|00003ab0| 6e 61 6c 5f 65 71 75 69 | 6e 6f 78 3a 0a 09 58 20 |nal_equi|nox:..X |
|00003ac0| 2a 20 43 6f 6d 70 75 74 | 65 20 4a 75 6c 69 61 6e |* Comput|e Julian|
|00003ad0| 20 64 61 79 20 66 6f 72 | 20 56 65 72 6e 61 6c 20 | day for| Vernal |
|00003ae0| 28 4d 61 72 63 68 29 20 | 45 71 75 69 6e 6f 78 20 |(March) |Equinox |
|00003af0| 67 69 76 65 6e 20 79 65 | 61 72 20 28 31 39 30 31 |given ye|ar (1901|
|00003b00| 2d 32 30 30 39 29 0a 09 | 58 20 2a 2f 0a 09 58 64 |-2009)..|X */..Xd|
|00003b10| 6f 75 62 6c 65 0a 09 58 | 76 65 72 6e 61 6c 5f 65 |ouble..X|vernal_e|
|00003b20| 71 75 69 6e 6f 78 28 79 | 65 61 72 29 0a 09 58 09 |quinox(y|ear)..X.|
|00003b30| 69 6e 74 09 79 65 61 72 | 3b 0a 09 58 7b 0a 09 58 |int.year|;..X{..X|
|00003b40| 09 64 6f 75 62 6c 65 09 | 73 6f 6c 73 74 69 63 65 |.double.|solstice|
|00003b50| 5f 65 71 75 69 6e 6f 78 | 5f 65 78 61 63 74 28 29 |_equinox|_exact()|
|00003b60| 3b 0a 09 58 0a 09 58 09 | 72 65 74 75 72 6e 20 73 |;..X..X.|return s|
|00003b70| 6f 6c 73 74 69 63 65 5f | 65 71 75 69 6e 6f 78 5f |olstice_|equinox_|
|00003b80| 65 78 61 63 74 28 30 2c | 20 79 65 61 72 29 3b 0a |exact(0,| year);.|
|00003b90| 09 58 7d 0a 09 58 0a 09 | 58 2f 2a 0a 09 58 20 2a |.X}..X..|X/*..X *|
|00003ba0| 20 73 75 6d 6d 65 72 5f | 73 6f 6c 73 74 69 63 65 | summer_|solstice|
|00003bb0| 3a 0a 09 58 20 2a 20 43 | 6f 6d 70 75 74 65 20 4a |:..X * C|ompute J|
|00003bc0| 75 6c 69 61 6e 20 64 61 | 79 20 66 6f 72 20 53 75 |ulian da|y for Su|
|00003bd0| 6d 6d 65 72 20 53 6f 6c | 73 74 69 63 65 20 28 4a |mmer Sol|stice (J|
|00003be0| 75 6e 65 29 20 67 69 76 | 65 6e 20 79 65 61 72 20 |une) giv|en year |
|00003bf0| 28 31 39 30 31 2d 32 30 | 30 39 29 0a 09 58 20 2a |(1901-20|09)..X *|
|00003c00| 2f 0a 09 58 64 6f 75 62 | 6c 65 0a 09 58 73 75 6d |/..Xdoub|le..Xsum|
|00003c10| 6d 65 72 5f 73 6f 6c 73 | 74 69 63 65 28 79 65 61 |mer_sols|tice(yea|
|00003c20| 72 29 0a 09 58 09 69 6e | 74 09 79 65 61 72 3b 0a |r)..X.in|t.year;.|
|00003c30| 09 58 7b 0a 09 58 09 64 | 6f 75 62 6c 65 09 73 6f |.X{..X.d|ouble.so|
|00003c40| 6c 73 74 69 63 65 5f 65 | 71 75 69 6e 6f 78 5f 65 |lstice_e|quinox_e|
|00003c50| 78 61 63 74 28 29 3b 0a | 09 58 0a 09 58 09 72 65 |xact();.|.X..X.re|
|00003c60| 74 75 72 6e 20 73 6f 6c | 73 74 69 63 65 5f 65 71 |turn sol|stice_eq|
|00003c70| 75 69 6e 6f 78 5f 65 78 | 61 63 74 28 31 2c 20 79 |uinox_ex|act(1, y|
|00003c80| 65 61 72 29 3b 0a 09 58 | 7d 0a 09 58 0a 09 58 2f |ear);..X|}..X..X/|
|00003c90| 2a 0a 09 58 20 2a 20 61 | 75 74 75 6d 6e 5f 65 71 |*..X * a|utumn_eq|
|00003ca0| 75 69 6e 6f 78 3a 0a 09 | 58 20 2a 20 43 6f 6d 70 |uinox:..|X * Comp|
|00003cb0| 75 74 65 20 4a 75 6c 69 | 61 6e 20 64 61 79 20 66 |ute Juli|an day f|
|00003cc0| 6f 72 20 41 75 74 75 6d | 6e 61 6c 20 28 53 65 70 |or Autum|nal (Sep|
|00003cd0| 74 65 6d 62 65 72 29 20 | 45 71 75 69 6e 6f 78 20 |tember) |Equinox |
|00003ce0| 67 69 76 65 6e 20 79 65 | 61 72 20 28 31 39 30 31 |given ye|ar (1901|
|00003cf0| 2d 32 30 30 39 29 0a 09 | 58 20 2a 2f 0a 09 58 64 |-2009)..|X */..Xd|
|00003d00| 6f 75 62 6c 65 0a 09 58 | 61 75 74 75 6d 6e 5f 65 |ouble..X|autumn_e|
|00003d10| 71 75 69 6e 6f 78 28 79 | 65 61 72 29 0a 09 58 09 |quinox(y|ear)..X.|
|00003d20| 69 6e 74 09 79 65 61 72 | 3b 0a 09 58 7b 0a 09 58 |int.year|;..X{..X|
|00003d30| 09 64 6f 75 62 6c 65 09 | 73 6f 6c 73 74 69 63 65 |.double.|solstice|
|00003d40| 5f 65 71 75 69 6e 6f 78 | 5f 65 78 61 63 74 28 29 |_equinox|_exact()|
|00003d50| 3b 0a 09 58 0a 09 58 09 | 72 65 74 75 72 6e 20 73 |;..X..X.|return s|
|00003d60| 6f 6c 73 74 69 63 65 5f | 65 71 75 69 6e 6f 78 5f |olstice_|equinox_|
|00003d70| 65 78 61 63 74 28 32 2c | 20 79 65 61 72 29 3b 0a |exact(2,| year);.|
|00003d80| 09 58 7d 0a 09 58 0a 09 | 58 2f 2a 0a 09 58 20 2a |.X}..X..|X/*..X *|
|00003d90| 20 77 69 6e 74 65 72 5f | 73 6f 6c 73 74 69 63 65 | winter_|solstice|
|00003da0| 3a 0a 09 58 20 2a 20 43 | 6f 6d 70 75 74 65 20 4a |:..X * C|ompute J|
|00003db0| 75 6c 69 61 6e 20 64 61 | 79 20 66 6f 72 20 57 69 |ulian da|y for Wi|
|00003dc0| 6e 74 65 72 20 28 44 65 | 63 65 6d 62 65 72 29 20 |nter (De|cember) |
|00003dd0| 53 6f 6c 73 74 69 63 65 | 20 67 69 76 65 6e 20 79 |Solstice| given y|
|00003de0| 65 61 72 20 28 31 39 30 | 31 2d 32 30 30 39 29 0a |ear (190|1-2009).|
|00003df0| 09 58 20 2a 2f 0a 09 58 | 64 6f 75 62 6c 65 0a 09 |.X */..X|double..|
|00003e00| 58 77 69 6e 74 65 72 5f | 73 6f 6c 73 74 69 63 65 |Xwinter_|solstice|
|00003e10| 28 79 65 61 72 29 0a 09 | 58 09 69 6e 74 09 79 65 |(year)..|X.int.ye|
|00003e20| 61 72 3b 0a 09 58 7b 0a | 09 58 09 64 6f 75 62 6c |ar;..X{.|.X.doubl|
|00003e30| 65 09 64 61 79 2c 20 6a | 64 61 79 3b 0a 09 58 09 |e.day, j|day;..X.|
|00003e40| 69 6e 74 09 6d 6f 6e 74 | 68 2c 20 6e 79 65 61 72 |int.mont|h, nyear|
|00003e50| 3b 0a 09 58 09 64 6f 75 | 62 6c 65 09 73 6f 6c 73 |;..X.dou|ble.sols|
|00003e60| 74 69 63 65 5f 65 71 75 | 69 6e 6f 78 5f 65 78 61 |tice_equ|inox_exa|
|00003e70| 63 74 28 29 3b 0a 09 58 | 0a 09 58 09 6a 64 61 79 |ct();..X|..X.jday|
|00003e80| 20 3d 20 73 6f 6c 73 74 | 69 63 65 5f 65 71 75 69 | = solst|ice_equi|
|00003e90| 6e 6f 78 5f 65 78 61 63 | 74 28 33 2c 20 79 65 61 |nox_exac|t(3, yea|
|00003ea0| 72 29 3b 0a 09 58 09 67 | 72 65 67 6f 72 69 61 6e |r);..X.g|regorian|
|00003eb0| 5f 64 61 74 65 28 26 64 | 61 79 2c 20 26 6d 6f 6e |_date(&d|ay, &mon|
|00003ec0| 74 68 2c 20 26 6e 79 65 | 61 72 2c 20 6a 64 61 79 |th, &nye|ar, jday|
|00003ed0| 29 3b 0a 09 58 09 69 66 | 20 28 6e 79 65 61 72 20 |);..X.if| (nyear |
|00003ee0| 3d 3d 20 79 65 61 72 29 | 0a 09 58 09 09 72 65 74 |== year)|..X..ret|
|00003ef0| 75 72 6e 20 6a 64 61 79 | 3b 0a 09 58 09 65 6c 73 |urn jday|;..X.els|
|00003f00| 65 0a 09 58 09 09 72 65 | 74 75 72 6e 20 73 6f 6c |e..X..re|turn sol|
|00003f10| 73 74 69 63 65 5f 65 71 | 75 69 6e 6f 78 5f 65 78 |stice_eq|uinox_ex|
|00003f20| 61 63 74 28 33 2c 20 28 | 79 65 61 72 20 2b 20 31 |act(3, (|year + 1|
|00003f30| 29 29 3b 0a 09 58 7d 0a | 09 58 0a 09 58 2f 2a 0a |));..X}.|.X..X/*.|
|00003f40| 09 58 20 2a 20 73 6f 6c | 73 74 69 63 65 5f 65 71 |.X * sol|stice_eq|
|00003f50| 75 69 6e 6f 78 5f 5f 65 | 78 61 63 74 3a 0a 09 58 |uinox__e|xact:..X|
|00003f60| 20 2a 20 43 6f 6d 70 75 | 74 65 20 6d 6f 72 65 20 | * Compu|te more |
|00003f70| 70 72 65 63 69 73 65 20 | 64 61 74 65 20 66 6f 72 |precise |date for|
|00003f80| 20 53 6f 6c 73 74 69 63 | 65 2f 45 71 75 69 6e 6f | Solstic|e/Equino|
|00003f90| 78 0a 09 58 20 2a 20 67 | 69 76 65 6e 20 63 6f 64 |x..X * g|iven cod|
|00003fa0| 65 20 28 31 2d 34 2c 20 | 31 20 66 6f 72 20 56 65 |e (1-4, |1 for Ve|
|00003fb0| 72 6e 61 6c 20 45 71 75 | 69 6e 6f 78 29 2c 20 79 |rnal Equ|inox), y|
|00003fc0| 65 61 72 20 28 31 39 30 | 31 2d 32 30 30 39 29 0a |ear (190|1-2009).|
|00003fd0| 09 58 20 2a 2f 0a 09 58 | 64 6f 75 62 6c 65 0a 09 |.X */..X|double..|
|00003fe0| 58 73 6f 6c 73 74 69 63 | 65 5f 65 71 75 69 6e 6f |Xsolstic|e_equino|
|00003ff0| 78 5f 65 78 61 63 74 28 | 63 6f 64 65 2c 20 79 65 |x_exact(|code, ye|
|00004000| 61 72 29 0a 09 58 09 69 | 6e 74 09 63 6f 64 65 2c |ar)..X.i|nt.code,|
|00004010| 20 79 65 61 72 3b 0a 09 | 58 7b 0a 09 58 09 69 6e | year;..|X{..X.in|
|00004020| 74 09 63 6f 75 6e 74 3b | 0a 09 58 0a 09 58 09 64 |t.count;|..X..X.d|
|00004030| 6f 75 62 6c 65 09 63 6f | 72 72 2c 20 6a 64 61 79 |ouble.co|rr, jday|
|00004040| 5f 61 70 70 3b 0a 09 58 | 09 64 6f 75 62 6c 65 09 |_app;..X|.double.|
|00004050| 73 6f 6c 73 74 69 63 65 | 5f 65 71 75 69 6e 6f 78 |solstice|_equinox|
|00004060| 5f 61 70 70 72 6f 78 28 | 29 2c 20 73 6f 6c 73 74 |_approx(|), solst|
|00004070| 69 63 65 5f 65 71 75 69 | 6e 6f 78 5f 63 6f 72 72 |ice_equi|nox_corr|
|00004080| 65 63 74 69 6f 6e 28 29 | 3b 0a 09 58 0a 09 58 09 |ection()|;..X..X.|
|00004090| 2f 2a 20 63 6f 6d 70 75 | 74 65 20 66 69 72 73 74 |/* compu|te first|
|000040a0| 20 61 70 70 72 6f 78 69 | 6d 61 74 69 6f 6e 20 74 | approxi|mation t|
|000040b0| 6f 20 4a 75 6c 69 61 6e | 20 64 61 79 20 2a 2f 0a |o Julian| day */.|
|000040c0| 09 58 09 6a 64 61 79 5f | 61 70 70 20 3d 20 73 6f |.X.jday_|app = so|
|000040d0| 6c 73 74 69 63 65 5f 65 | 71 75 69 6e 6f 78 5f 61 |lstice_e|quinox_a|
|000040e0| 70 70 72 6f 78 28 63 6f | 64 65 2c 20 79 65 61 72 |pprox(co|de, year|
|000040f0| 29 3b 0a 09 58 09 2f 2a | 20 69 74 65 72 61 74 69 |);..X./*| iterati|
|00004100| 76 65 6c 79 20 72 65 63 | 6f 6d 70 75 74 65 20 63 |vely rec|ompute c|
|00004110| 6f 72 72 65 63 74 65 64 | 20 4a 75 6c 69 61 6e 20 |orrected| Julian |
|00004120| 64 61 79 20 2a 2f 0a 09 | 58 09 66 6f 72 28 63 6f |day */..|X.for(co|
|00004130| 75 6e 74 20 3d 20 30 3b | 20 63 6f 75 6e 74 20 3c |unt = 0;| count <|
|00004140| 20 31 35 3b 20 63 6f 75 | 6e 74 2b 2b 29 20 7b 0a | 15; cou|nt++) {.|
|00004150| 09 58 09 09 63 6f 72 72 | 20 3d 20 73 6f 6c 73 74 |.X..corr| = solst|
|00004160| 69 63 65 5f 65 71 75 69 | 6e 6f 78 5f 63 6f 72 72 |ice_equi|nox_corr|
|00004170| 65 63 74 69 6f 6e 28 6a | 64 61 79 5f 61 70 70 2c |ection(j|day_app,|
|00004180| 20 63 6f 64 65 29 3b 0a | 09 58 09 09 6a 64 61 79 | code);.|.X..jday|
|00004190| 5f 61 70 70 20 2b 3d 20 | 63 6f 72 72 3b 0a 09 58 |_app += |corr;..X|
|000041a0| 09 09 69 66 20 28 66 61 | 62 73 28 63 6f 72 72 29 |..if (fa|bs(corr)|
|000041b0| 20 3c 20 30 2e 30 30 30 | 30 31 29 0a 09 58 09 09 | < 0.000|01)..X..|
|000041c0| 09 62 72 65 61 6b 3b 0a | 09 58 09 7d 0a 09 58 09 |.break;.|.X.}..X.|
|000041d0| 72 65 74 75 72 6e 20 6a | 64 61 79 5f 61 70 70 3b |return j|day_app;|
|000041e0| 0a 09 58 7d 0a 09 58 0a | 09 58 2f 2a 0a 09 58 20 |..X}..X.|.X/*..X |
|000041f0| 2a 20 73 6f 6c 73 74 69 | 63 65 5f 65 71 75 69 6e |* solsti|ce_equin|
|00004200| 6f 78 5f 63 6f 72 72 65 | 63 74 69 6f 6e 3a 0a 09 |ox_corre|ction:..|
|00004210| 58 20 2a 20 43 6f 6d 70 | 75 74 65 20 63 6f 72 72 |X * Comp|ute corr|
|00004220| 65 63 74 69 6f 6e 20 66 | 6f 72 20 53 6f 6c 73 74 |ection f|or Solst|
|00004230| 69 63 65 2f 45 71 75 69 | 6e 6f 78 20 4a 75 6c 69 |ice/Equi|nox Juli|
|00004240| 61 6e 20 64 61 79 0a 09 | 58 20 2a 20 61 70 70 72 |an day..|X * appr|
|00004250| 6f 78 69 6d 61 74 65 20 | 4a 75 6c 69 61 6e 20 64 |oximate |Julian d|
|00004260| 61 79 2c 20 63 6f 64 65 | 20 28 31 2d 34 2c 20 31 |ay, code| (1-4, 1|
|00004270| 20 66 6f 72 20 56 65 72 | 6e 61 6c 20 45 71 75 69 | for Ver|nal Equi|
|00004280| 6e 6f 78 29 0a 09 58 20 | 2a 2f 0a 09 58 64 6f 75 |nox)..X |*/..Xdou|
|00004290| 62 6c 65 0a 09 58 73 6f | 6c 73 74 69 63 65 5f 65 |ble..Xso|lstice_e|
|000042a0| 71 75 69 6e 6f 78 5f 63 | 6f 72 72 65 63 74 69 6f |quinox_c|orrectio|
|000042b0| 6e 28 6a 64 61 79 2c 20 | 63 6f 64 65 29 0a 09 58 |n(jday, |code)..X|
|000042c0| 09 69 6e 74 09 63 6f 64 | 65 3b 0a 09 58 09 64 6f |.int.cod|e;..X.do|
|000042d0| 75 62 6c 65 09 6a 64 61 | 79 3b 0a 09 58 7b 0a 09 |uble.jda|y;..X{..|
|000042e0| 58 09 64 6f 75 62 6c 65 | 09 61 70 70 61 72 65 6e |X.double|.apparen|
|000042f0| 74 5f 6c 6f 6e 67 69 74 | 75 64 65 28 29 2c 20 73 |t_longit|ude(), s|
|00004300| 69 6e 5f 64 65 67 72 65 | 65 73 28 29 3b 0a 09 58 |in_degre|es();..X|
|00004310| 0a 09 58 09 72 65 74 75 | 72 6e 28 35 38 2e 30 20 |..X.retu|rn(58.0 |
|00004320| 2a 20 73 69 6e 5f 64 65 | 67 72 65 65 73 28 28 63 |* sin_de|grees((c|
|00004330| 6f 64 65 20 2a 20 39 30 | 2e 30 29 20 2d 20 61 70 |ode * 90|.0) - ap|
|00004340| 70 61 72 65 6e 74 5f 6c | 6f 6e 67 69 74 75 64 65 |parent_l|ongitude|
|00004350| 28 6a 64 61 79 29 29 29 | 3b 0a 09 58 7d 0a 09 58 |(jday)))|;..X}..X|
|00004360| 0a 09 58 2f 2a 0a 09 58 | 20 2a 20 61 70 70 61 72 |..X/*..X| * appar|
|00004370| 65 6e 74 5f 6c 6f 6e 67 | 69 74 75 64 65 3a 0a 09 |ent_long|itude:..|
|00004380| 58 20 2a 20 43 6f 6d 70 | 75 74 65 20 61 70 70 61 |X * Comp|ute appa|
|00004390| 72 65 6e 74 20 6c 6f 6e | 67 69 74 75 64 65 20 28 |rent lon|gitude (|
|000043a0| 74 72 75 65 20 65 71 75 | 69 6e 6f 78 29 20 6f 66 |true equ|inox) of|
|000043b0| 20 53 75 6e 20 66 6f 72 | 0a 09 58 20 2a 20 53 6f | Sun for|..X * So|
|000043c0| 6c 73 74 69 63 65 2f 45 | 71 75 69 6e 6f 78 20 67 |lstice/E|quinox g|
|000043d0| 69 76 65 6e 20 61 70 70 | 72 6f 78 69 6d 61 74 65 |iven app|roximate|
|000043e0| 20 4a 75 6c 69 61 6e 20 | 64 61 79 0a 09 58 20 2a | Julian |day..X *|
|000043f0| 2f 0a 09 58 64 6f 75 62 | 6c 65 0a 09 58 61 70 70 |/..Xdoub|le..Xapp|
|00004400| 61 72 65 6e 74 5f 6c 6f | 6e 67 69 74 75 64 65 28 |arent_lo|ngitude(|
|00004410| 6a 64 61 79 29 0a 09 58 | 09 64 6f 75 62 6c 65 09 |jday)..X|.double.|
|00004420| 6a 64 61 79 3b 0a 09 58 | 7b 0a 09 58 09 64 6f 75 |jday;..X|{..X.dou|
|00004430| 62 6c 65 09 62 74 6d 70 | 2c 20 63 74 6d 70 2c 20 |ble.btmp|, ctmp, |
|00004440| 64 74 6d 70 2c 20 65 74 | 6d 70 2c 20 66 74 6d 70 |dtmp, et|mp, ftmp|
|00004450| 3b 0a 09 58 09 64 6f 75 | 62 6c 65 09 73 69 6e 5f |;..X.dou|ble.sin_|
|00004460| 64 65 67 72 65 65 73 28 | 29 3b 0a 09 58 0a 09 58 |degrees(|);..X..X|
|00004470| 09 62 74 6d 70 20 3d 20 | 28 6a 64 61 79 20 2d 20 |.btmp = |(jday - |
|00004480| 32 34 31 35 30 32 30 2e | 30 29 20 2f 20 33 36 35 |2415020.|0) / 365|
|00004490| 32 35 2e 30 3b 09 2f 2a | 20 74 69 6d 65 20 69 6e |25.0;./*| time in|
|000044a0| 20 4a 75 6c 69 61 6e 20 | 63 65 6e 74 75 72 69 65 | Julian |centurie|
|000044b0| 73 3a 20 2a 2f 0a 09 58 | 09 09 09 09 09 09 2f 2a |s: */..X|....../*|
|000044c0| 20 65 70 6f 63 68 20 30 | 2e 35 20 4a 61 6e 75 61 | epoch 0|.5 Janua|
|000044d0| 72 79 20 31 39 30 30 20 | 2a 2f 0a 09 58 09 63 74 |ry 1900 |*/..X.ct|
|000044e0| 6d 70 20 3d 20 32 37 39 | 2e 36 39 36 36 38 20 2b |mp = 279|.69668 +|
|000044f0| 20 28 33 36 30 30 30 2e | 37 36 38 39 32 20 2a 20 | (36000.|76892 * |
|00004500| 62 74 6d 70 29 20 2f 2a | 20 67 65 6f 6d 65 74 72 |btmp) /*| geometr|
|00004510| 69 63 20 6d 65 61 6e 20 | 6c 6f 6e 67 69 74 75 64 |ic mean |longitud|
|00004520| 65 20 2a 2f 0a 09 58 09 | 09 2b 20 28 30 2e 30 30 |e */..X.|.+ (0.00|
|00004530| 30 33 30 32 35 20 2a 20 | 62 74 6d 70 20 2a 20 62 |03025 * |btmp * b|
|00004540| 74 6d 70 29 3b 09 2f 2a | 20 28 6d 65 61 6e 20 65 |tmp);./*| (mean e|
|00004550| 71 75 69 6e 6f 78 20 6f | 66 20 74 68 65 20 64 61 |quinox o|f the da|
|00004560| 74 65 29 20 2a 2f 0a 09 | 58 09 64 74 6d 70 20 3d |te) */..|X.dtmp =|
|00004570| 20 33 35 38 2e 34 37 35 | 38 33 20 2b 20 28 33 35 | 358.475|83 + (35|
|00004580| 39 39 39 2e 30 34 39 37 | 35 20 2a 20 62 74 6d 70 |999.0497|5 * btmp|
|00004590| 29 09 2f 2a 20 6d 65 61 | 6e 20 61 6e 6f 6d 61 6c |)./* mea|n anomal|
|000045a0| 79 20 6f 66 20 53 75 6e | 20 2a 2f 0a 09 58 09 09 |y of Sun| */..X..|
|000045b0| 2b 20 28 30 2e 30 30 30 | 31 35 20 2a 20 62 74 6d |+ (0.000|15 * btm|
|000045c0| 70 20 2a 20 62 74 6d 70 | 29 0a 09 58 09 09 2b 20 |p * btmp|)..X..+ |
|000045d0| 28 30 2e 30 30 30 30 30 | 33 33 20 2a 20 62 74 6d |(0.00000|33 * btm|
|000045e0| 70 20 2a 20 62 74 6d 70 | 20 2a 20 62 74 6d 70 29 |p * btmp| * btmp)|
|000045f0| 3b 0a 09 58 09 65 74 6d | 70 20 3d 20 28 31 2e 39 |;..X.etm|p = (1.9|
|00004600| 31 39 34 36 30 20 2d 20 | 28 30 2e 30 30 34 37 38 |19460 - |(0.00478|
|00004610| 39 20 2a 20 62 74 6d 70 | 29 09 2f 2a 20 53 75 6e |9 * btmp|)./* Sun|
|00004620| 27 73 20 65 71 6e 20 6f | 66 20 74 68 65 20 63 65 |'s eqn o|f the ce|
|00004630| 6e 74 65 72 20 2a 2f 0a | 09 58 09 09 2d 20 28 30 |nter */.|.X..- (0|
|00004640| 2e 30 30 30 30 31 34 20 | 2a 20 62 74 6d 70 29 29 |.000014 |* btmp))|
|00004650| 20 2a 20 73 69 6e 5f 64 | 65 67 72 65 65 73 28 64 | * sin_d|egrees(d|
|00004660| 74 6d 70 29 0a 09 58 09 | 09 2b 20 28 30 2e 30 32 |tmp)..X.|.+ (0.02|
|00004670| 30 30 39 34 20 2d 20 28 | 30 2e 30 30 30 31 20 2a |0094 - (|0.0001 *|
|00004680| 20 62 74 6d 70 29 29 20 | 2a 20 73 69 6e 5f 64 65 | btmp)) |* sin_de|
|00004690| 67 72 65 65 73 28 32 20 | 2a 20 64 74 6d 70 29 0a |grees(2 |* dtmp).|
|000046a0| 09 58 09 09 2b 20 30 2e | 30 30 30 32 39 33 20 2a |.X..+ 0.|000293 *|
|000046b0| 20 73 69 6e 5f 64 65 67 | 72 65 65 73 28 33 20 2a | sin_deg|rees(3 *|
|000046c0| 20 64 74 6d 70 29 3b 0a | 09 58 09 66 74 6d 70 20 | dtmp);.|.X.ftmp |
|000046d0| 3d 20 63 74 6d 70 20 2b | 20 65 74 6d 70 3b 09 09 |= ctmp +| etmp;..|
|000046e0| 09 2f 2a 20 53 75 6e 27 | 73 20 74 72 75 65 20 6c |./* Sun'|s true l|
|000046f0| 6f 6e 67 69 74 75 64 65 | 20 2a 2f 0a 09 58 09 72 |ongitude| */..X.r|
|00004700| 65 74 75 72 6e 20 66 74 | 6d 70 20 2d 20 30 2e 30 |eturn ft|mp - 0.0|
|00004710| 30 35 36 39 09 09 09 2f | 2a 20 61 70 70 2e 20 6c |0569.../|* app. l|
|00004720| 6f 6e 67 2e 20 6f 66 20 | 53 75 6e 20 2a 2f 0a 09 |ong. of |Sun */..|
|00004730| 58 09 09 2d 20 30 2e 30 | 30 34 37 39 20 2a 20 73 |X..- 0.0|0479 * s|
|00004740| 69 6e 5f 64 65 67 72 65 | 65 73 28 32 35 39 2e 31 |in_degre|es(259.1|
|00004750| 38 09 2f 2a 20 28 74 72 | 75 65 20 65 71 75 69 6e |8./* (tr|ue equin|
|00004760| 6f 78 20 6f 66 20 74 68 | 65 20 64 61 74 65 29 20 |ox of th|e date) |
|00004770| 2a 2f 0a 09 58 09 09 2d | 20 28 31 39 33 34 2e 31 |*/..X..-| (1934.1|
|00004780| 34 32 20 2a 20 62 74 6d | 70 29 29 3b 0a 09 58 7d |42 * btm|p));..X}|
|00004790| 0a 09 58 0a 09 58 2f 2a | 0a 09 58 20 2a 20 73 69 |..X..X/*|..X * si|
|000047a0| 6e 5f 64 65 67 72 65 65 | 73 3a 0a 09 58 20 2a 20 |n_degree|s:..X * |
|000047b0| 43 6f 6d 70 75 74 65 20 | 73 69 6e 20 66 6f 72 20 |Compute |sin for |
|000047c0| 61 72 67 75 6d 65 6e 74 | 20 69 6e 20 64 65 67 72 |argument| in degr|
|000047d0| 65 65 73 0a 09 58 20 2a | 2f 0a 09 58 64 6f 75 62 |ees..X *|/..Xdoub|
|000047e0| 6c 65 0a 09 58 73 69 6e | 5f 64 65 67 72 65 65 73 |le..Xsin|_degrees|
|000047f0| 28 64 65 67 72 65 65 73 | 29 0a 09 58 23 64 65 66 |(degrees|)..X#def|
|00004800| 69 6e 65 09 50 49 5f 43 | 4f 52 52 09 30 2e 30 31 |ine.PI_C|ORR.0.01|
|00004810| 37 34 35 33 32 39 32 35 | 32 09 09 09 09 2f 2a 20 |74532925|2..../* |
|00004820| 70 69 20 2f 20 31 38 30 | 20 2a 2f 0a 09 58 09 64 |pi / 180| */..X.d|
|00004830| 6f 75 62 6c 65 09 64 65 | 67 72 65 65 73 3b 0a 09 |ouble.de|grees;..|
|00004840| 58 7b 0a 09 58 09 72 65 | 74 75 72 6e 20 73 69 6e |X{..X.re|turn sin|
|00004850| 28 64 65 67 72 65 65 73 | 20 2a 20 50 49 5f 43 4f |(degrees| * PI_CO|
|00004860| 52 52 29 3b 0a 09 58 7d | 0a 09 58 0a 09 58 2f 2a |RR);..X}|..X..X/*|
|00004870| 0a 09 58 20 2a 20 73 6f | 6c 73 74 69 63 65 5f 65 |..X * so|lstice_e|
|00004880| 71 75 69 6e 6f 78 5f 61 | 70 70 72 6f 78 3a 0a 09 |quinox_a|pprox:..|
|00004890| 58 20 2a 20 43 6f 6d 70 | 75 74 65 20 61 70 70 72 |X * Comp|ute appr|
|000048a0| 6f 78 69 6d 61 74 65 20 | 64 61 74 65 20 66 6f 72 |oximate |date for|
|000048b0| 20 53 6f 6c 73 74 69 63 | 65 2f 45 71 75 69 6e 6f | Solstic|e/Equino|
|000048c0| 78 0a 09 58 20 2a 20 67 | 69 76 65 6e 20 63 6f 64 |x..X * g|iven cod|
|000048d0| 65 20 28 31 2d 34 2c 20 | 31 20 66 6f 72 20 56 65 |e (1-4, |1 for Ve|
|000048e0| 72 6e 61 6c 20 45 71 75 | 69 6e 6f 78 29 2c 20 79 |rnal Equ|inox), y|
|000048f0| 65 61 72 20 28 31 39 30 | 31 2d 32 30 30 39 29 0a |ear (190|1-2009).|
|00004900| 09 58 20 2a 2f 0a 09 58 | 64 6f 75 62 6c 65 0a 09 |.X */..X|double..|
|00004910| 58 73 6f 6c 73 74 69 63 | 65 5f 65 71 75 69 6e 6f |Xsolstic|e_equino|
|00004920| 78 5f 61 70 70 72 6f 78 | 28 63 6f 64 65 2c 20 79 |x_approx|(code, y|
|00004930| 65 61 72 29 0a 09 58 09 | 69 6e 74 09 63 6f 64 65 |ear)..X.|int.code|
|00004940| 2c 20 79 65 61 72 3b 0a | 09 58 7b 0a 09 58 09 72 |, year;.|.X{..X.r|
|00004950| 65 74 75 72 6e 20 28 33 | 36 35 2e 32 34 32 32 20 |eturn (3|65.2422 |
|00004960| 2a 20 28 79 65 61 72 20 | 2b 20 28 63 6f 64 65 20 |* (year |+ (code |
|00004970| 2f 20 34 29 29 29 20 2b | 20 31 37 32 31 31 34 31 |/ 4))) +| 1721141|
|00004980| 2e 33 3b 0a 09 58 7d 0a | 09 58 0a 09 58 2f 2a 0a |.3;..X}.|.X..X/*.|
|00004990| 09 58 20 2a 20 65 61 73 | 74 65 72 3a 0a 09 58 20 |.X * eas|ter:..X |
|000049a0| 2a 20 52 65 74 75 72 6e | 20 4a 75 6c 69 61 6e 20 |* Return| Julian |
|000049b0| 64 61 74 65 20 66 6f 72 | 20 45 61 73 74 65 72 2c |date for| Easter,|
|000049c0| 20 67 69 76 65 6e 20 79 | 65 61 72 20 28 31 39 30 | given y|ear (190|
|000049d0| 31 2d 32 30 30 39 29 0a | 09 58 20 2a 0a 09 58 20 |1-2009).|.X *..X |
|000049e0| 2a 20 4f 66 66 65 72 65 | 64 20 69 6e 20 74 68 65 |* Offere|d in the|
|000049f0| 20 62 6f 6f 6b 20 6f 66 | 20 4d 65 65 75 73 2c 20 | book of| Meeus, |
|00004a00| 77 68 69 63 68 20 63 69 | 74 65 73 3a 0a 09 58 20 |which ci|tes:..X |
|00004a10| 2a 0a 09 58 20 2a 20 31 | 29 20 53 70 65 6e 63 65 |*..X * 1|) Spence|
|00004a20| 72 20 4a 6f 6e 65 73 0a | 09 58 20 2a 20 20 20 20 |r Jones.|.X *    |
|00004a30| 47 65 6e 65 72 61 6c 20 | 41 73 74 72 6f 6e 6f 6d |General |Astronom|
|00004a40| 79 0a 09 58 20 2a 20 20 | 20 20 31 39 32 32 0a 09 |y..X *  |  1922..|
|00004a50| 58 20 2a 20 20 20 20 70 | 67 2e 20 37 33 2d 37 34 |X *    p|g. 73-74|
|00004a60| 0a 09 58 20 2a 0a 09 58 | 20 2a 20 32 29 20 4a 6f |..X *..X| * 2) Jo|
|00004a70| 75 72 6e 61 6c 20 6f 66 | 20 74 68 65 20 42 72 69 |urnal of| the Bri|
|00004a80| 74 69 73 68 20 41 73 74 | 72 6f 6e 6f 6d 69 63 61 |tish Ast|ronomica|
|00004a90| 6c 20 41 73 73 6f 63 69 | 61 74 69 6f 6e 0a 09 58 |l Associ|ation..X|
|00004aa0| 20 2a 20 20 20 20 56 6f | 6c 2e 20 38 0a 09 58 20 | *    Vo|l. 8..X |
|00004ab0| 2a 20 20 20 20 50 67 2e | 20 39 31 0a 09 58 20 2a |*    Pg.| 91..X *|
|00004ac0| 20 20 20 20 44 65 63 2e | 20 31 39 37 37 0a 09 58 |    Dec.| 1977..X|
|00004ad0| 20 2a 20 20 20 20 28 77 | 68 69 63 68 20 61 74 74 | *    (w|hich att|
|00004ae0| 72 69 62 75 74 65 73 20 | 6d 65 74 68 6f 64 20 74 |ributes |method t|
|00004af0| 6f 20 42 75 74 63 68 65 | 72 27 73 20 45 63 63 6c |o Butche|r's Eccl|
|00004b00| 65 73 69 61 73 74 69 63 | 61 6c 20 43 61 6c 65 6e |esiastic|al Calen|
|00004b10| 64 61 72 20 6f 66 20 31 | 38 37 36 29 0a 09 58 20 |dar of 1|876)..X |
|00004b20| 2a 0a 09 58 20 2a 20 4d | 65 74 68 6f 64 20 76 61 |*..X * M|ethod va|
|00004b30| 6c 69 64 20 66 6f 72 20 | 61 6c 6c 20 64 61 74 65 |lid for |all date|
|00004b40| 73 20 69 6e 20 74 68 65 | 20 47 72 65 67 6f 72 69 |s in the| Gregori|
|00004b50| 61 6e 20 63 61 6c 65 6e | 64 61 72 0a 09 58 20 2a |an calen|dar..X *|
|00004b60| 20 28 66 72 6f 6d 20 31 | 35 20 4f 63 74 6f 62 65 | (from 1|5 Octobe|
|00004b70| 72 20 31 35 38 33 20 6f | 6e 29 0a 09 58 20 2a 2f |r 1583 o|n)..X */|
|00004b80| 0a 09 58 64 6f 75 62 6c | 65 0a 09 58 65 61 73 74 |..Xdoubl|e..Xeast|
|00004b90| 65 72 28 79 65 61 72 29 | 0a 09 58 09 69 6e 74 09 |er(year)|..X.int.|
|00004ba0| 79 65 61 72 3b 0a 09 58 | 7b 0a 09 58 09 64 6f 75 |year;..X|{..X.dou|
|00004bb0| 62 6c 65 09 64 61 79 3b | 0a 09 58 09 69 6e 74 09 |ble.day;|..X.int.|
|00004bc0| 61 74 6d 70 2c 20 62 74 | 6d 70 2c 20 63 74 6d 70 |atmp, bt|mp, ctmp|
|00004bd0| 2c 20 64 74 6d 70 2c 20 | 65 74 6d 70 2c 20 66 74 |, dtmp, |etmp, ft|
|00004be0| 6d 70 2c 0a 09 58 09 09 | 67 74 6d 70 2c 20 68 74 |mp,..X..|gtmp, ht|
|00004bf0| 6d 70 2c 20 69 74 6d 70 | 2c 20 6b 74 6d 70 2c 20 |mp, itmp|, ktmp, |
|00004c00| 6c 74 6d 70 2c 20 6d 74 | 6d 70 3b 0a 09 58 09 69 |ltmp, mt|mp;..X.i|
|00004c10| 6e 74 09 6d 6f 6e 74 68 | 3b 0a 09 58 0a 09 58 09 |nt.month|;..X..X.|
|00004c20| 61 74 6d 70 20 3d 20 79 | 65 61 72 20 25 20 31 39 |atmp = y|ear % 19|
|00004c30| 3b 0a 09 58 09 62 74 6d | 70 20 3d 20 79 65 61 72 |;..X.btm|p = year|
|00004c40| 20 2f 20 31 30 30 3b 0a | 09 58 09 63 74 6d 70 20 | / 100;.|.X.ctmp |
|00004c50| 3d 20 79 65 61 72 20 25 | 20 31 30 30 3b 0a 09 58 |= year %| 100;..X|
|00004c60| 09 64 74 6d 70 20 3d 20 | 62 74 6d 70 20 2f 20 34 |.dtmp = |btmp / 4|
|00004c70| 3b 0a 09 58 09 65 74 6d | 70 20 3d 20 62 74 6d 70 |;..X.etm|p = btmp|
|00004c80| 20 25 20 34 3b 0a 09 58 | 09 66 74 6d 70 20 3d 20 | % 4;..X|.ftmp = |
|00004c90| 28 62 74 6d 70 20 2b 20 | 38 29 20 2f 20 32 35 3b |(btmp + |8) / 25;|
|00004ca0| 0a 09 58 09 67 74 6d 70 | 20 3d 20 28 62 74 6d 70 |..X.gtmp| = (btmp|
|00004cb0| 20 2d 20 66 74 6d 70 20 | 2b 20 31 29 20 2f 20 33 | - ftmp |+ 1) / 3|
|00004cc0| 3b 0a 09 58 09 68 74 6d | 70 20 3d 20 28 28 31 39 |;..X.htm|p = ((19|
|00004cd0| 20 2a 20 61 74 6d 70 29 | 20 2b 20 62 74 6d 70 20 | * atmp)| + btmp |
|00004ce0| 2d 20 64 74 6d 70 20 2d | 20 67 74 6d 70 20 2b 20 |- dtmp -| gtmp + |
|00004cf0| 31 35 29 20 25 20 33 30 | 3b 0a 09 58 09 69 74 6d |15) % 30|;..X.itm|
|00004d00| 70 20 3d 20 63 74 6d 70 | 20 2f 20 34 3b 0a 09 58 |p = ctmp| / 4;..X|
|00004d10| 09 6b 74 6d 70 20 3d 20 | 63 74 6d 70 20 25 20 34 |.ktmp = |ctmp % 4|
|00004d20| 3b 0a 09 58 09 6c 74 6d | 70 20 3d 20 28 33 32 20 |;..X.ltm|p = (32 |
|00004d30| 2b 20 28 32 20 2a 20 65 | 74 6d 70 29 20 2b 20 28 |+ (2 * e|tmp) + (|
|00004d40| 32 20 2a 20 69 74 6d 70 | 29 20 2d 20 68 74 6d 70 |2 * itmp|) - htmp|
|00004d50| 20 2d 20 6b 74 6d 70 29 | 20 25 20 37 3b 0a 09 58 | - ktmp)| % 7;..X|
|00004d60| 09 6d 74 6d 70 20 3d 20 | 28 61 74 6d 70 20 2b 20 |.mtmp = |(atmp + |
|00004d70| 28 31 31 20 2a 20 68 74 | 6d 70 29 20 2b 20 28 32 |(11 * ht|mp) + (2|
|00004d80| 32 20 2a 20 6c 74 6d 70 | 29 29 20 2f 20 34 35 31 |2 * ltmp|)) / 451|
|00004d90| 3b 0a 09 58 09 6d 6f 6e | 74 68 20 3d 20 28 68 74 |;..X.mon|th = (ht|
|00004da0| 6d 70 20 2b 20 6c 74 6d | 70 20 2d 20 28 37 20 2a |mp + ltm|p - (7 *|
|00004db0| 20 6d 74 6d 70 29 20 2b | 20 31 31 34 29 20 2f 20 | mtmp) +| 114) / |
|00004dc0| 33 31 3b 0a 09 58 09 64 | 61 79 20 3d 20 28 28 68 |31;..X.d|ay = ((h|
|00004dd0| 74 6d 70 20 2b 20 6c 74 | 6d 70 20 2d 20 28 37 20 |tmp + lt|mp - (7 |
|00004de0| 2a 20 6d 74 6d 70 29 20 | 2b 20 31 31 34 29 20 25 |* mtmp) |+ 114) %|
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