| 1 | /*
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| 2 | * Copyright (C) 1999-2000 Harri Porten ([email protected])
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| 3 | * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
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| 4 | *
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| 5 | * This library is free software; you can redistribute it and/or
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| 6 | * modify it under the terms of the GNU Lesser General Public
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| 7 | * License as published by the Free Software Foundation; either
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| 8 | * version 2 of the License, or (at your option) any later version.
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| 9 | *
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| 10 | * This library is distributed in the hope that it will be useful,
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| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 13 | * Lesser General Public License for more details.
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| 14 | *
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| 15 | * You should have received a copy of the GNU Lesser General Public
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| 16 | * License along with this library; if not, write to the Free Software
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| 17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
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| 18 | * USA
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| 19 | *
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| 20 | */
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| 21 |
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| 22 | #include "config.h"
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| 23 | #include "DateInstance.h"
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| 24 |
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| 25 | #include "DateMath.h"
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| 26 | #include <math.h>
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| 27 | #include <wtf/MathExtras.h>
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| 28 |
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| 29 | namespace JSC {
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| 30 |
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| 31 | struct DateInstance::Cache {
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| 32 | double m_gregorianDateTimeCachedForMS;
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| 33 | GregorianDateTime m_cachedGregorianDateTime;
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| 34 | double m_gregorianDateTimeUTCCachedForMS;
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| 35 | GregorianDateTime m_cachedGregorianDateTimeUTC;
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| 36 | };
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| 37 |
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| 38 | const ClassInfo DateInstance::info = {"Date", 0, 0, 0};
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| 39 |
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| 40 | DateInstance::DateInstance(PassRefPtr<StructureID> structure)
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| 41 | : JSWrapperObject(structure)
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| 42 | , m_cache(0)
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| 43 | {
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| 44 | }
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| 45 |
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| 46 | DateInstance::~DateInstance()
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| 47 | {
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| 48 | delete m_cache;
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| 49 | }
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| 50 |
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| 51 | void DateInstance::msToGregorianDateTime(double milli, bool outputIsUTC, GregorianDateTime& t) const
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| 52 | {
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| 53 | if (!m_cache) {
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| 54 | m_cache = new Cache;
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| 55 | m_cache->m_gregorianDateTimeCachedForMS = NaN;
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| 56 | m_cache->m_gregorianDateTimeUTCCachedForMS = NaN;
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| 57 | }
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| 58 |
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| 59 | if (outputIsUTC) {
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| 60 | if (m_cache->m_gregorianDateTimeUTCCachedForMS != milli) {
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| 61 | JSC::msToGregorianDateTime(milli, true, m_cache->m_cachedGregorianDateTimeUTC);
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| 62 | m_cache->m_gregorianDateTimeUTCCachedForMS = milli;
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| 63 | }
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| 64 | t.copyFrom(m_cache->m_cachedGregorianDateTimeUTC);
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| 65 | } else {
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| 66 | if (m_cache->m_gregorianDateTimeCachedForMS != milli) {
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| 67 | JSC::msToGregorianDateTime(milli, false, m_cache->m_cachedGregorianDateTime);
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| 68 | m_cache->m_gregorianDateTimeCachedForMS = milli;
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| 69 | }
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| 70 | t.copyFrom(m_cache->m_cachedGregorianDateTime);
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| 71 | }
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| 72 | }
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| 73 |
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| 74 | bool DateInstance::getTime(GregorianDateTime& t, int& offset) const
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| 75 | {
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| 76 | double milli = internalNumber();
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| 77 | if (isnan(milli))
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| 78 | return false;
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| 79 |
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| 80 | msToGregorianDateTime(milli, false, t);
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| 81 | offset = gmtoffset(t);
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| 82 | return true;
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| 83 | }
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| 84 |
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| 85 | bool DateInstance::getUTCTime(GregorianDateTime& t) const
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| 86 | {
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| 87 | double milli = internalNumber();
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| 88 | if (isnan(milli))
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| 89 | return false;
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| 90 |
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| 91 | msToGregorianDateTime(milli, true, t);
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| 92 | return true;
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| 93 | }
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| 94 |
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| 95 | bool DateInstance::getTime(double& milli, int& offset) const
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| 96 | {
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| 97 | milli = internalNumber();
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| 98 | if (isnan(milli))
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| 99 | return false;
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| 100 |
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| 101 | GregorianDateTime t;
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| 102 | msToGregorianDateTime(milli, false, t);
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| 103 | offset = gmtoffset(t);
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| 104 | return true;
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| 105 | }
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| 106 |
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| 107 | bool DateInstance::getUTCTime(double& milli) const
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| 108 | {
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| 109 | milli = internalNumber();
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| 110 | if (isnan(milli))
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| 111 | return false;
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| 112 |
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| 113 | return true;
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| 114 | }
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| 115 |
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| 116 | } // namespace JSC
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