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1  /*
2   * Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
3   * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
4   * Copyright (C) 2009 Google Inc. All rights reserved.
5   *
6   * The Original Code is Mozilla Communicator client code, released
7   * March 31, 1998.
8   *
9   * The Initial Developer of the Original Code is
10   * Netscape Communications Corporation.
11   * Portions created by the Initial Developer are Copyright (C) 1998
12   * the Initial Developer. All Rights Reserved.
13   *
14   * This library is free software; you can redistribute it and/or
15   * modify it under the terms of the GNU Lesser General Public
16   * License as published by the Free Software Foundation; either
17   * version 2.1 of the License, or (at your option) any later version.
18   *
19   * This library is distributed in the hope that it will be useful,
20   * but WITHOUT ANY WARRANTY; without even the implied warranty of
21   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
22   * Lesser General Public License for more details.
23   *
24   * You should have received a copy of the GNU Lesser General Public
25   * License along with this library; if not, write to the Free Software
26   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
27   *
28   * Alternatively, the contents of this file may be used under the terms
29   * of either the Mozilla Public License Version 1.1, found at
30   * http://www.mozilla.org/MPL/ (the "MPL") or the GNU General Public
31   * License Version 2.0, found at http://www.fsf.org/copyleft/gpl.html
32   * (the "GPL"), in which case the provisions of the MPL or the GPL are
33   * applicable instead of those above.  If you wish to allow use of your
34   * version of this file only under the terms of one of those two
35   * licenses (the MPL or the GPL) and not to allow others to use your
36   * version of this file under the LGPL, indicate your decision by
37   * deletingthe provisions above and replace them with the notice and
38   * other provisions required by the MPL or the GPL, as the case may be.
39   * If you do not delete the provisions above, a recipient may use your
40   * version of this file under any of the LGPL, the MPL or the GPL.
41   */
42  
43  #include "config.h"
44  #include "DateConversion.h"
45  
46  #include "CallFrame.h"
47  #include "JSObject.h"
48  #include "ScopeChain.h"
49  #include "UString.h"
50  #include <wtf/DateMath.h>
51  #include <wtf/StringExtras.h>
52  #include <wtf/text/CString.h>
53  
54  using namespace WTF;
55  
56  namespace JSC {
57  
parseDate(ExecState * exec,const UString & date)58  double parseDate(ExecState* exec, const UString &date)
59  {
60      if (date == exec->globalData().cachedDateString)
61          return exec->globalData().cachedDateStringValue;
62      double value = parseES5DateFromNullTerminatedCharacters(date.utf8().data());
63      if (isnan(value))
64          value = parseDateFromNullTerminatedCharacters(exec, date.utf8().data());
65      exec->globalData().cachedDateString = date;
66      exec->globalData().cachedDateStringValue = value;
67      return value;
68  }
69  
formatDate(const GregorianDateTime & t,DateConversionBuffer & buffer)70  void formatDate(const GregorianDateTime &t, DateConversionBuffer& buffer)
71  {
72      snprintf(buffer, DateConversionBufferSize, "%s %s %02d %04d",
73          weekdayName[(t.weekDay + 6) % 7],
74          monthName[t.month], t.monthDay, t.year + 1900);
75  }
76  
formatDateUTCVariant(const GregorianDateTime & t,DateConversionBuffer & buffer)77  void formatDateUTCVariant(const GregorianDateTime &t, DateConversionBuffer& buffer)
78  {
79      snprintf(buffer, DateConversionBufferSize, "%s, %02d %s %04d",
80          weekdayName[(t.weekDay + 6) % 7],
81          t.monthDay, monthName[t.month], t.year + 1900);
82  }
83  
formatTime(const GregorianDateTime & t,DateConversionBuffer & buffer)84  void formatTime(const GregorianDateTime &t, DateConversionBuffer& buffer)
85  {
86      int offset = abs(gmtoffset(t));
87      char timeZoneName[70];
88      struct tm gtm = t;
89      strftime(timeZoneName, sizeof(timeZoneName), "%Z", &gtm);
90  
91      if (timeZoneName[0]) {
92          snprintf(buffer, DateConversionBufferSize, "%02d:%02d:%02d GMT%c%02d%02d (%s)",
93              t.hour, t.minute, t.second,
94              gmtoffset(t) < 0 ? '-' : '+', offset / (60*60), (offset / 60) % 60, timeZoneName);
95      } else {
96          snprintf(buffer, DateConversionBufferSize, "%02d:%02d:%02d GMT%c%02d%02d",
97              t.hour, t.minute, t.second,
98              gmtoffset(t) < 0 ? '-' : '+', offset / (60*60), (offset / 60) % 60);
99      }
100  }
101  
formatTimeUTC(const GregorianDateTime & t,DateConversionBuffer & buffer)102  void formatTimeUTC(const GregorianDateTime &t, DateConversionBuffer& buffer)
103  {
104      snprintf(buffer, DateConversionBufferSize, "%02d:%02d:%02d GMT", t.hour, t.minute, t.second);
105  }
106  
107  } // namespace JSC
108