xref: /PHP-8.0/ext/calendar/cal_unix.c (revision e857dfa7)
1 /*
2    +----------------------------------------------------------------------+
3    | Copyright (c) The PHP Group                                          |
4    +----------------------------------------------------------------------+
5    | This source file is subject to version 3.01 of the PHP license,      |
6    | that is bundled with this package in the file LICENSE, and is        |
7    | available through the world-wide-web at the following url:           |
8    | http://www.php.net/license/3_01.txt                                  |
9    | If you did not receive a copy of the PHP license and are unable to   |
10    | obtain it through the world-wide-web, please send a note to          |
11    | license@php.net so we can mail you a copy immediately.               |
12    +----------------------------------------------------------------------+
13    | Authors: Shane Caraveo             <shane@caraveo.com>               |
14    |          Colin Viebrock            <colin@easydns.com>               |
15    |          Hartmut Holzgraefe        <hholzgra@php.net>                |
16    +----------------------------------------------------------------------+
17  */
18 
19 #include "php.h"
20 #include "php_calendar.h"
21 #include "sdncal.h"
22 #include <time.h>
23 
24 #define SECS_PER_DAY (24 * 3600)
25 
26 /* {{{ Convert UNIX timestamp to Julian Day */
PHP_FUNCTION(unixtojd)27 PHP_FUNCTION(unixtojd)
28 {
29 	time_t ts;
30 	zend_long tl = 0;
31 	zend_bool tl_is_null = 1;
32 	struct tm *ta, tmbuf;
33 
34 	if (zend_parse_parameters(ZEND_NUM_ARGS(), "|l!", &tl, &tl_is_null) == FAILURE) {
35 		RETURN_THROWS();
36 	}
37 
38 	if (tl_is_null) {
39 		ts = time(NULL);
40 	} else if (tl >= 0) {
41 		ts = (time_t) tl;
42 	} else {
43 		zend_argument_value_error(1, "must be greater than or equal to 0");
44 		RETURN_THROWS();
45 	}
46 
47 	if (!(ta = php_localtime_r(&ts, &tmbuf))) {
48 		RETURN_FALSE;
49 	}
50 
51 	RETURN_LONG(GregorianToSdn(ta->tm_year+1900, ta->tm_mon+1, ta->tm_mday));
52 }
53 /* }}} */
54 
55 /* {{{ Convert Julian Day to UNIX timestamp */
PHP_FUNCTION(jdtounix)56 PHP_FUNCTION(jdtounix)
57 {
58 	zend_long uday;
59 
60 	if (zend_parse_parameters(ZEND_NUM_ARGS(), "l", &uday) == FAILURE) {
61 		RETURN_THROWS();
62 	}
63 	uday -= 2440588 /* J.D. of 1.1.1970 */;
64 
65 	if (uday < 0 || uday > ZEND_LONG_MAX / SECS_PER_DAY) { /* before beginning of unix epoch or greater than representable */
66 		zend_value_error("jday must be between 2440588 and " ZEND_LONG_FMT, ZEND_LONG_MAX / SECS_PER_DAY + 2440588);
67 		RETURN_THROWS();
68 	}
69 
70 	RETURN_LONG(uday * SECS_PER_DAY);
71 }
72 /* }}} */
73