| line |
stmt |
bran |
cond |
sub |
pod |
time |
code |
|
1
|
|
|
|
|
|
|
/* |
|
2
|
|
|
|
|
|
|
* Copyright (c) 2012-2015 Christian Hansen |
|
3
|
|
|
|
|
|
|
* |
|
4
|
|
|
|
|
|
|
* All rights reserved. |
|
5
|
|
|
|
|
|
|
* |
|
6
|
|
|
|
|
|
|
* Redistribution and use in source and binary forms, with or without |
|
7
|
|
|
|
|
|
|
* modification, are permitted provided that the following conditions are met: |
|
8
|
|
|
|
|
|
|
* |
|
9
|
|
|
|
|
|
|
* 1. Redistributions of source code must retain the above copyright notice, this |
|
10
|
|
|
|
|
|
|
* list of conditions and the following disclaimer. |
|
11
|
|
|
|
|
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice, |
|
12
|
|
|
|
|
|
|
* this list of conditions and the following disclaimer in the documentation |
|
13
|
|
|
|
|
|
|
* and/or other materials provided with the distribution. |
|
14
|
|
|
|
|
|
|
* |
|
15
|
|
|
|
|
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
|
16
|
|
|
|
|
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
|
17
|
|
|
|
|
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
|
18
|
|
|
|
|
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR |
|
19
|
|
|
|
|
|
|
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
|
20
|
|
|
|
|
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
|
21
|
|
|
|
|
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
|
22
|
|
|
|
|
|
|
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
|
23
|
|
|
|
|
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
|
24
|
|
|
|
|
|
|
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
|
25
|
|
|
|
|
|
|
*/ |
|
26
|
|
|
|
|
|
|
#include "dt_core.h" |
|
27
|
|
|
|
|
|
|
#include "dt_easter.h" |
|
28
|
|
|
|
|
|
|
|
|
29
|
|
|
|
|
|
|
/* |
|
30
|
|
|
|
|
|
|
* Easter algorithms by Al Petrofsky, San Mateo County, California, U.S.A. |
|
31
|
|
|
|
|
|
|
* |
|
32
|
|
|
|
|
|
|
*/ |
|
33
|
|
|
|
|
|
|
static int |
|
34
|
0
|
|
|
|
|
|
easter_gregorian(unsigned int y) { |
|
35
|
|
|
|
|
|
|
unsigned int a, b; |
|
36
|
0
|
|
|
|
|
|
a = y/100 * 1483 - y/400 * 2225 + 2613; |
|
37
|
0
|
|
|
|
|
|
b = ((y % 19 * 3510 + a/25 * 319) / 330) % 29; |
|
38
|
0
|
|
|
|
|
|
return 56 - b - ((y * 5/4) + a - b) % 7; |
|
39
|
|
|
|
|
|
|
} |
|
40
|
|
|
|
|
|
|
|
|
41
|
|
|
|
|
|
|
static int |
|
42
|
0
|
|
|
|
|
|
easter_julian(unsigned int y) { |
|
43
|
|
|
|
|
|
|
unsigned int a; |
|
44
|
0
|
|
|
|
|
|
a = (y % 19 * 19 + 15) % 30; |
|
45
|
0
|
|
|
|
|
|
return 28 + a - ((y * 5/4) + a) % 7; |
|
46
|
|
|
|
|
|
|
} |
|
47
|
|
|
|
|
|
|
|
|
48
|
|
|
|
|
|
|
dt_t |
|
49
|
0
|
|
|
|
|
|
dt_from_easter(int y, dt_computus_t computus) { |
|
50
|
0
|
0
|
|
|
|
|
if (y < 1) |
|
51
|
0
|
|
|
|
|
|
return 0; |
|
52
|
0
|
0
|
|
|
|
|
if (computus == DT_WESTERN) |
|
53
|
0
|
|
|
|
|
|
return dt_from_ymd(y, 3, easter_gregorian(y)); |
|
54
|
|
|
|
|
|
|
else |
|
55
|
0
|
|
|
|
|
|
return dt_from_ymd(y, 3, easter_julian(y) + y/100 - y/400 - 2); |
|
56
|
|
|
|
|
|
|
} |
|
57
|
|
|
|
|
|
|
|