Util/DateTimeUtil.cs

   1 //
   2 // DateTimeUtil.cs
   3 //
   4 // Copyright (C) 2006 Debajyoti Bera <dbera.web@gmail.com>
   5 //
   6
   7 //
   8 // Permission is hereby granted, free of charge, to any person obtaining a
   9 // copy of this software and associated documentation files (the "Software"),
  10 // to deal in the Software without restriction, including without limitation
  11 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12 // and/or sell copies of the Software, and to permit persons to whom the
  13 // Software is furnished to do so, subject to the following conditions:
  14 //
  15 // The above copyright notice and this permission notice shall be included in
  16 // all copies or substantial portions of the Software.
  17 //
  18 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  21 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  24 // DEALINGS IN THE SOFTWARE.
  25 //
  26
  27 using System;
  28 using System.Globalization;
  29
  30 namespace Beagle.Util {
  31
  32         public class DateTimeUtil {
  33
  34                 private DateTimeUtil () { }
  35
  36                 private static DateTime epoch;
  37
  38                 static DateTimeUtil ()
  39                 {
  40                         // Hack to compensate for lousy .Net-1 DateTime
  41                         // DateTime (1970,1,1,0,0,0,0) creates a datetime of 1970/1/1 00:00:00 _Localtime_
  42                         // Adjust timezone difference to make the time correct wrt to its timezone
  43                         epoch = new DateTime (1970, 1, 1, 0, 0, 0).ToLocalTime ();
  44                 }
  45
  46                 public static DateTime UnixToDateTimeUtc (long time_t)
  47                 {
  48                         return epoch.AddSeconds (time_t);
  49                 }
  50
  51                 public static string ToString (DateTime dt)
  52                 {
  53                         return dt.ToString("yyyy-MM-dd HH:mm:ss zzz", CultureInfo.InvariantCulture);
  54                 }
  55         }
  56 }
  57