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/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2012 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Derick Rethans <derick@derickrethans.nl> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include "timelib.h"
#include <math.h>
timelib_rel_time *timelib_diff(timelib_time *one, timelib_time *two)
{
timelib_rel_time *rt;
timelib_time *swp;
timelib_sll dst_h_corr = 0, dst_m_corr = 0;
timelib_time one_backup, two_backup;
rt = timelib_rel_time_ctor();
rt->invert = 0;
if (one->sse > two->sse) {
swp = two;
two = one;
one = swp;
rt->invert = 1;
}
/* Calculate correction for DST change over, but only if the TZ type is ID
* and it's the same */
if (one->zone_type == 3 && two->zone_type == 3
&& (strcmp(one->tz_info->name, two->tz_info->name) == 0)
&& (one->z != two->z))
{
dst_h_corr = (two->z - one->z) / 3600;
dst_m_corr = ((two->z - one->z) % 3600) / 60;
}
/* Save old TZ info */
memcpy(&one_backup, one, sizeof(one_backup));
memcpy(&two_backup, two, sizeof(two_backup));
timelib_apply_localtime(one, 0);
timelib_apply_localtime(two, 0);
rt->y = two->y - one->y;
rt->m = two->m - one->m;
rt->d = two->d - one->d;
rt->h = two->h - one->h + dst_h_corr;
rt->i = two->i - one->i + dst_m_corr;
rt->s = two->s - one->s;
rt->days = abs(floor((one->sse - two->sse - (dst_h_corr * 3600) - (dst_m_corr * 60)) / 86400));
timelib_do_rel_normalize(rt->invert ? one : two, rt);
/* Restore old TZ info */
memcpy(one, &one_backup, sizeof(one_backup));
memcpy(two, &two_backup, sizeof(two_backup));
return rt;
}
|
