runtime/DateConversion.cpp

   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 "JSDateMath.h"
  48 #include "JSObject.h"
  49 #include "ScopeChain.h"
  50 #include "UString.h"
  51 #include <wtf/StringExtras.h>
  52 #include <wtf/text/CString.h>
  53
  54 using namespace WTF;
  55
  56 namespace JSC {
  57
  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
  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
  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
  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
 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