src/common/datetime.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/datetime.h
   3 // Purpose:     implementation of time/date related classes
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     11.05.99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "datetime.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/string.h"
  33     #include "wx/intl.h"
  34     #include "wx/log.h"
  35 #endif // WX_PRECOMP
  36
  37 #include "wx/datetime.h"
  38
  39 // ============================================================================
  40 // implementation of wxDateTime
  41 // ============================================================================
  42
  43 // ----------------------------------------------------------------------------
  44 // static data
  45 // ----------------------------------------------------------------------------
  46
  47 Country wxDateTime::ms_country;
  48 wxDateTime wxDateTime::ms_InvDateTime;
  49
  50 // ----------------------------------------------------------------------------
  51 // constructors and assignment operators
  52 // ----------------------------------------------------------------------------
  53
  54 wxDateTime& wxDateTime::Set(const struct tm& tm)
  55 {
  56     time_t timet = mktime(tm);
  57     if ( timet == (time_t)(-1) )
  58     {
  59         wxFAIL_MSG(_T("Invalid time"));
  60
  61         return ms_InvDateTime;
  62     }
  63     else
  64     {
  65         return Set(timet);
  66     }
  67 }
  68
  69 wxDateTime& wxDateTime::Set(wxDateTime_t hour,
  70                             wxDateTime_t minute,
  71                             wxDateTime_t second,
  72                             wxDateTime_t millisec)
  73 {
  74     // we allow seconds to be 61 to account for the leap seconds, even if we
  75     // don't use them really
  76     wxCHECK_MSG( hour < 24 && second < 62 && minute < 60 && millisec < 1000,
  77                  ms_InvDateTime,
  78                  _T("Invalid time in wxDateTime::Set()") );
  79
  80     // get the current date from system
  81     time_t timet = GetTimeNow();
  82     struct tm *tm = localtime(&timet);
  83
  84     // adjust the time
  85     tm->tm_hour = hour;
  86     tm->tm_min = minute;
  87     tm->tm_sec = second;
  88
  89     (void)Set(tm);
  90
  91     // and finally adjust milliseconds
  92     return SetMillisecond(millisec);
  93 }
  94
  95 wxDateTime& wxDateTime::Set(wxDateTime_t day,
  96                             Month        month,
  97                             int          year,
  98                             wxDateTime_t hour,
  99                             wxDateTime_t minute,
 100                             wxDateTime_t second,
 101                             wxDateTime_t millisec)
 102 {
 103     wxCHECK_MSG( hour < 24 && second < 62 && minute < 60 && millisec < 1000,
 104                  ms_InvDateTime,
 105                  _T("Invalid time in wxDateTime::Set()") );
 106
 107     if ( year == Inv_Year )
 108         year = GetCurrentYear();
 109     if ( month == Inv_Month )
 110         month = GetCurrentMonth();
 111
 112     wxCHECK_MSG( day < GetNumberOfDays(month, year), ms_InvDateTime,
 113                  _T("Invalid date in wxDateTime::Set()") );
 114
 115     // the range of time_t type (inclusive)
 116     static const int yearMinInRange = 1970;
 117     static const int yearMaxInRange = 2037;
 118
 119     // test only the year instead of testing for the exact end of the Unix
 120     // time_t range - it doesn't bring anything to do more precise checks
 121     if ( year >= yearMaxInRange && year <= yearMaxInRange )
 122     {
 123         // use the standard library version if the date is in range - this is
 124         // probably much more efficient than our code
 125         struct tm tm;
 126         tm.tm_year = year;
 127         tm.tm_mon = month;
 128         tm.tm_mday = day;
 129         tm.tm_hour = hour;
 130         tm.tm_min = minute;
 131         tm.tm_sec = second;
 132
 133         (void)Set(tm);
 134
 135         // and finally adjust milliseconds
 136         return SetMillisecond(millisec);
 137     }
 138     else
 139     {
 140         // do time calculations ourselves: we want to calculate the number of
 141         // milliseconds between the given date and the epoch (necessarily
 142         // negative)
 143     }
 144
 145     return *this;
 146 }