paskha.c (200470) | paskha.c (205821) |
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1/* | 1/*- |
2 * Copyright (C) 1993-1996 by Andrey A. Chernov, Moscow, Russia. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. --- 10 unchanged lines hidden (view full) --- 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> | 2 * Copyright (C) 1993-1996 by Andrey A. Chernov, Moscow, Russia. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. --- 10 unchanged lines hidden (view full) --- 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> |
28__FBSDID("$FreeBSD: head/usr.bin/calendar/paskha.c 200470 2009-12-13 04:50:11Z delphij $"); | 28__FBSDID("$FreeBSD: head/usr.bin/calendar/paskha.c 205821 2010-03-29 06:49:20Z edwin $"); |
29 30#include <stdio.h> 31#include <stdlib.h> 32#include <string.h> 33 34#include "calendar.h" 35 36#define PASKHA "paskha" 37#define PASKHALEN (sizeof(PASKHA) - 1) 38 | 29 30#include <stdio.h> 31#include <stdlib.h> 32#include <string.h> 33 34#include "calendar.h" 35 36#define PASKHA "paskha" 37#define PASKHALEN (sizeof(PASKHA) - 1) 38 |
39static int paskha(int); 40 | |
41/* return year day for Orthodox Easter using Gauss formula */ 42/* (old style result) */ 43 | 39/* return year day for Orthodox Easter using Gauss formula */ 40/* (old style result) */ 41 |
44static int | 42int |
45paskha(int R) /*year*/ 46{ 47 int a, b, c, d, e; 48 static int x = 15; 49 static int y = 6; | 43paskha(int R) /*year*/ 44{ 45 int a, b, c, d, e; 46 static int x = 15; 47 static int y = 6; |
48 int *cumday; |
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50 51 a = R % 19; 52 b = R % 4; 53 c = R % 7; 54 d = (19 * a + x) % 30; 55 e = (2 * b + 4 * c + 6 * d + y) % 7; | 49 50 a = R % 19; 51 b = R % 4; 52 c = R % 7; 53 d = (19 * a + x) % 30; 54 e = (2 * b + 4 * c + 6 * d + y) % 7; |
56 return (((cumdays[3] + 1) + 22) + (d + e)); | 55 cumday = cumdaytab[isleap(R)]; 56 return (((cumday[3] + 1) + 22) + (d + e)); |
57} | 57} |
58 59/* return year day for Orthodox Easter depending days */ 60 61int 62getpaskha(char *s, int year) 63{ 64 int offset; 65 66 if (strncasecmp(s, PASKHA, PASKHALEN) == 0) 67 s += PASKHALEN; 68 else if (npaskha.name != NULL 69 && strncasecmp(s, npaskha.name, npaskha.len) == 0) 70 s += npaskha.len; 71 else 72 return 0; 73 74 /* Paskha+1 or Paskha-2 75 * ^ ^ */ 76 77 switch (*s) { 78 79 case '-': 80 case '+': 81 offset = atoi(s); 82 break; 83 84 default: 85 offset = 0; 86 break; 87 } 88 89 return (paskha(year) + offset + 13 /* new style */); 90} | |