166 lines
2.5 KiB
C++
166 lines
2.5 KiB
C++
/*
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* This file is a part of Winix
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* and is not publicly distributed
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*
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* Copyright (c) 2012, Tomasz Sowa
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* All rights reserved.
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*
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*/
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#include "timezone.h"
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TimeZone::TimeZone()
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{
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Clear();
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}
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void TimeZone::Clear()
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{
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tz_id = -1;
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tz_offset = 0;
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tz_has_dst = false;
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tz_dst_offset = 0;
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tz_dst_start.Clear();
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tz_dst_end.Clear();
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}
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time_t TimeZone::CalcLocalOffset(const PT::Date & utc_date)
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{
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time_t offset;
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offset = tz_offset;
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// !! CHECK ME need to be tested
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if( tz_has_dst )
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{
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PT::Date local(utc_date);
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local += tz_offset;
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local.year = tz_dst_start.year;
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tz_dst_end.year = tz_dst_start.year;
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if( tz_dst_start <= local && local < tz_dst_end )
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offset += tz_dst_offset;
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}
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return offset;
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}
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time_t TimeZone::ToLocal(time_t utc_time)
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{
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time_t offset = CalcLocalOffset(PT::Date(utc_time));
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return utc_time + offset;
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}
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PT::Date TimeZone::ToLocal(const PT::Date & utc_date)
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{
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PT::Date local(utc_date);
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local += CalcLocalOffset(utc_date);
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return local;
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}
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time_t TimeZone::CalcUTCOffset(const PT::Date & local_date)
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{
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time_t offset;
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offset = tz_offset;
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if( tz_has_dst )
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{
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// !! CHECK ME need to be tested
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PT::Date local(local_date);
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local -= tz_dst_offset;
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local.year = tz_dst_start.year;
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tz_dst_end.year = tz_dst_start.year;
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if( tz_dst_start <= local && local < tz_dst_end )
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offset += tz_dst_offset;
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}
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return offset;
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}
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time_t TimeZone::ToUTC(time_t local_time)
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{
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time_t offset = CalcUTCOffset(PT::Date(local_time));
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return local_time - offset;
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}
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PT::Date TimeZone::ToUTC(const PT::Date & local_date)
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{
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time_t offset;
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PT::Date utc(local_date);
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offset = CalcUTCOffset(local_date);
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utc -= offset;
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return utc;
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}
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bool TimeZone::SetTz(PT::Space & space)
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{
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bool result = true;
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tz_id = space.Int(L"tz_id", -1);
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tz_offset = space.Long(L"tz_offset", 0);
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tz_has_dst = space.Bool(L"tz_has_dst", false);
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time_t h13 = 60 * 60 * 13; // 13 hours
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time_t h15 = 60 * 60 * 15; // 15 hours
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time_t h24 = 60 * 60 * 24; // 24 hours
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if( tz_offset < -h13 || tz_offset > h15 )
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result = false;
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if( tz_has_dst )
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{
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tz_dst_start.year = 1970;
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tz_dst_end.year = 1970;
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if( !tz_dst_start.ParseMonthDayTime(space.Text(L"tz_dst_start")) )
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result = false;
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if( !tz_dst_end.ParseMonthDayTime(space.Text(L"tz_dst_end")) )
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result = false;
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tz_dst_offset = space.Long(L"tz_dst_offset");
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if( tz_dst_offset < -h24 || tz_dst_offset > h24 )
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result = false;
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}
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else
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{
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tz_dst_start.Clear();
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tz_dst_end.Clear();
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tz_dst_offset = 0;
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}
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if( !result )
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Clear();
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return result;
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}
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