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author | ache <ache@FreeBSD.org> | 1996-05-10 16:30:22 +0000 |
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committer | ache <ache@FreeBSD.org> | 1996-05-10 16:30:22 +0000 |
commit | e18782182041e3c1e4a504c753d97480e206140b (patch) | |
tree | 2ee499be5fe987b5fb50fd8e4f1d0fba39c3a560 /usr.bin/calendar/paskha.c | |
parent | ee79fb34b7ffbfb608645cae031e188a0c427e27 (diff) | |
download | FreeBSD-src-e18782182041e3c1e4a504c753d97480e206140b.zip FreeBSD-src-e18782182041e3c1e4a504c753d97480e206140b.tar.gz |
Localize it
Handle Orthodox Eastern
-Wall cleanup
Diffstat (limited to 'usr.bin/calendar/paskha.c')
-rw-r--r-- | usr.bin/calendar/paskha.c | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/usr.bin/calendar/paskha.c b/usr.bin/calendar/paskha.c new file mode 100644 index 0000000..3fa8a31 --- /dev/null +++ b/usr.bin/calendar/paskha.c @@ -0,0 +1,91 @@ +/* + * Copyright (C) 1993-1996 by Andrey A. Chernov, Moscow, Russia. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <stdlib.h> +#include <string.h> + +#define PASKHA "paskha" +#define PASKHALEN (sizeof(PASKHA) - 1) + +/* KOI8-R encoding, needed to fully handle Russian case */ +#define PASKHA1 "пасха" +#define PASKHALEN1 (sizeof(PASKHA1) - 1) + +extern int *cumdays; + +/* return year day for Orthodox Easter using Gauss formula */ +/* (old style result) */ + +static int +paskha (R) +int R; /*year*/ +{ + int a, b, c, d, e; + static int x = 15; + static int y = 6; + + a = R % 19; + b = R % 4; + c = R % 7; + d = (19*a + x) % 30; + e = (2*b + 4*c + 6*d + y) % 7; + return ((cumdays[2/*feb*/] + 22/*mar*/) + (d + e)); +} + +/* return year day for Orthodox Easter depending days */ + +int +getpaskha(s, year) + char *s; + int year; +{ + int offset; + + if (strncasecmp(s, PASKHA, PASKHALEN) == 0) + s += PASKHALEN; + else if (strncasecmp(s, PASKHA1, PASKHALEN1) == 0) + s += PASKHALEN1; + else + return 0; + + + /* Paskha+1 or Paskha-2 + * ^ ^ */ + + switch(*s) { + + case '-': + case '+': + offset = atoi(s); + break; + + default: + offset = 0; + break; + } + + return (paskha(year) + offset + 13/* new style */); +} |