Annotation of embedaddon/php/ext/date/lib/interval.c, revision 1.1.1.3
1.1 misho 1: /*
2: +----------------------------------------------------------------------+
3: | PHP Version 5 |
4: +----------------------------------------------------------------------+
1.1.1.3 ! misho 5: | Copyright (c) 1997-2013 The PHP Group |
1.1 misho 6: +----------------------------------------------------------------------+
7: | This source file is subject to version 3.01 of the PHP license, |
8: | that is bundled with this package in the file LICENSE, and is |
9: | available through the world-wide-web at the following url: |
10: | http://www.php.net/license/3_01.txt |
11: | If you did not receive a copy of the PHP license and are unable to |
12: | obtain it through the world-wide-web, please send a note to |
13: | license@php.net so we can mail you a copy immediately. |
14: +----------------------------------------------------------------------+
15: | Authors: Derick Rethans <derick@derickrethans.nl> |
16: +----------------------------------------------------------------------+
17: */
18:
1.1.1.2 misho 19: /* $Id$ */
1.1 misho 20:
21: #include "timelib.h"
22: #include <math.h>
23:
24: timelib_rel_time *timelib_diff(timelib_time *one, timelib_time *two)
25: {
26: timelib_rel_time *rt;
27: timelib_time *swp;
28: timelib_sll dst_h_corr = 0, dst_m_corr = 0;
29: timelib_time one_backup, two_backup;
30:
31: rt = timelib_rel_time_ctor();
32: rt->invert = 0;
33: if (one->sse > two->sse) {
34: swp = two;
35: two = one;
36: one = swp;
37: rt->invert = 1;
38: }
39:
40: /* Calculate correction for DST change over, but only if the TZ type is ID
41: * and it's the same */
42: if (one->zone_type == 3 && two->zone_type == 3
43: && (strcmp(one->tz_info->name, two->tz_info->name) == 0)
44: && (one->z != two->z))
45: {
46: dst_h_corr = (two->z - one->z) / 3600;
47: dst_m_corr = ((two->z - one->z) % 3600) / 60;
48: }
49:
50: /* Save old TZ info */
51: memcpy(&one_backup, one, sizeof(one_backup));
52: memcpy(&two_backup, two, sizeof(two_backup));
53:
54: timelib_apply_localtime(one, 0);
55: timelib_apply_localtime(two, 0);
56:
57: rt->y = two->y - one->y;
58: rt->m = two->m - one->m;
59: rt->d = two->d - one->d;
60: rt->h = two->h - one->h + dst_h_corr;
61: rt->i = two->i - one->i + dst_m_corr;
62: rt->s = two->s - one->s;
63: rt->days = abs(floor((one->sse - two->sse - (dst_h_corr * 3600) - (dst_m_corr * 60)) / 86400));
64:
65: timelib_do_rel_normalize(rt->invert ? one : two, rt);
66:
67: /* Restore old TZ info */
68: memcpy(one, &one_backup, sizeof(one_backup));
69: memcpy(two, &two_backup, sizeof(two_backup));
70:
71: return rt;
72: }
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