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 "UString.h"
  48 #include <wtf/DateMath.h>
  49 #include <wtf/StringExtras.h>
  50
  51 using namespace WTF;
  52
  53 namespace JSC {
  54
  55 double parseDate(ExecState* exec, const UString &date)
  56 {
  57     if (date == exec->globalData().cachedDateString)
  58         return exec->globalData().cachedDateStringValue;
  59     double value = parseDateFromNullTerminatedCharacters(exec, date.UTF8String().data());
  60     exec->globalData().cachedDateString = date;
  61     exec->globalData().cachedDateStringValue = value;
  62     return value;
  63 }
  64
  65 void formatDate(const GregorianDateTime &t, DateConversionBuffer& buffer)
  66 {
  67     snprintf(buffer, DateConversionBufferSize, "%s %s %02d %04d",
  68         weekdayName[(t.weekDay + 6) % 7],
  69         monthName[t.month], t.monthDay, t.year + 1900);
  70 }
  71
  72 void formatDateUTCVariant(const GregorianDateTime &t, DateConversionBuffer& buffer)
  73 {
  74     snprintf(buffer, DateConversionBufferSize, "%s, %02d %s %04d",
  75         weekdayName[(t.weekDay + 6) % 7],
  76         t.monthDay, monthName[t.month], t.year + 1900);
  77 }
  78
  79 void formatTime(const GregorianDateTime &t, DateConversionBuffer& buffer)
  80 {
  81     int offset = abs(gmtoffset(t));
  82     char timeZoneName[70];
  83     struct tm gtm = t;
  84     strftime(timeZoneName, sizeof(timeZoneName), "%Z", &gtm);
  85
  86     if (timeZoneName[0]) {
  87         snprintf(buffer, DateConversionBufferSize, "%02d:%02d:%02d GMT%c%02d%02d (%s)",
  88             t.hour, t.minute, t.second,
  89             gmtoffset(t) < 0 ? '-' : '+', offset / (60*60), (offset / 60) % 60, timeZoneName);
  90     } else {
  91         snprintf(buffer, DateConversionBufferSize, "%02d:%02d:%02d GMT%c%02d%02d",
  92             t.hour, t.minute, t.second,
  93             gmtoffset(t) < 0 ? '-' : '+', offset / (60*60), (offset / 60) % 60);
  94     }
  95 }
  96
  97 void formatTimeUTC(const GregorianDateTime &t, DateConversionBuffer& buffer)
  98 {
  99     snprintf(buffer, DateConversionBufferSize, "%02d:%02d:%02d GMT", t.hour, t.minute, t.second);
 100 }
 101
 102 } // namespace JSC