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72 lines
2.5 KiB
C
72 lines
2.5 KiB
C
/*
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+----------------------------------------------------------------------+
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| PHP Version 5 |
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+----------------------------------------------------------------------+
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| Copyright (c) 1997-2010 The PHP Group |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.01 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.php.net/license/3_01.txt |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Authors: Derick Rethans <derick@derickrethans.nl> |
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+----------------------------------------------------------------------+
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*/
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/* $Id$ */
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#include "timelib.h"
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timelib_rel_time *timelib_diff(timelib_time *one, timelib_time *two)
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{
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timelib_rel_time *rt;
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timelib_time *swp;
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timelib_sll dst_h_corr = 0, dst_m_corr = 0;
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timelib_time one_backup, two_backup;
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rt = timelib_rel_time_ctor();
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rt->invert = 0;
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if (one->sse > two->sse) {
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swp = two;
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two = one;
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one = swp;
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rt->invert = 1;
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}
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/* Calculate correction for DST change over, but only if the TZ type is ID
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* and it's the same */
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if (one->zone_type == 3 && two->zone_type == 3
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&& (strcmp(one->tz_info->name, two->tz_info->name) == 0)
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&& (one->z != two->z))
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{
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dst_h_corr = (two->z - one->z) / 3600;
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dst_m_corr = ((two->z - one->z) % 3600) / 60;
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}
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/* Save old TZ info */
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memcpy(&one_backup, one, sizeof(one_backup));
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memcpy(&two_backup, two, sizeof(two_backup));
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timelib_apply_localtime(one, 0);
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timelib_apply_localtime(two, 0);
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rt->y = two->y - one->y;
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rt->m = two->m - one->m;
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rt->d = two->d - one->d;
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rt->h = two->h - one->h + dst_h_corr;
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rt->i = two->i - one->i + dst_m_corr;
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rt->s = two->s - one->s;
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rt->days = abs(floor((one->sse - two->sse - (dst_h_corr * 3600) - (dst_m_corr * 60)) / 86400));
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timelib_do_rel_normalize(rt->invert ? one : two, rt);
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/* Restore old TZ info */
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memcpy(one, &one_backup, sizeof(one_backup));
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memcpy(two, &two_backup, sizeof(two_backup));
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return rt;
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}
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