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Annotation of embedaddon/php/ext/date/lib/interval.c, revision 1.1

1.1     ! misho       1: /*
        !             2:    +----------------------------------------------------------------------+
        !             3:    | PHP Version 5                                                        |
        !             4:    +----------------------------------------------------------------------+
        !             5:    | Copyright (c) 1997-2010 The PHP Group                                |
        !             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: 
        !            19: /* $Id: interval.c 320563 2011-12-07 08:39:43Z pajoye $ */
        !            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: }