src/msw/wince/time.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/wince/time.cpp
   3 // Purpose:     Implements missing time functionality for WinCE
   4 // Author:      Marco Cavallini (MCK) - wx@koansoftware.com
   5 // Modified by:
   6 // Created:     31-08-2003
   7 // RCS-ID:
   8 // Copyright:   (c) Marco Cavallini
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ===========================================================================
  13 // declarations
  14 // ===========================================================================
  15
  16 // ---------------------------------------------------------------------------
  17 // headers
  18 // ---------------------------------------------------------------------------
  19
  20 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  21     #pragma implementation "window.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/msw/wrapwin.h"
  33 #endif
  34
  35 #include "wx/msw/wince/time.h"
  36 #include <winbase.h>
  37
  38 #define is_leap(y)   (y % 4 == 0 && (y % 100 != 0 || y % 400 == 0))
  39 #define SECONDS_IN_ONE_MINUTE      60
  40 #define DAYS_IN_ONE_YEAR          365
  41 #define SECONDS_IN_ONE_MIN         60
  42 #define SECONDS_IN_ONE_HOUR      3600
  43 #define SECONDS_IN_ONE_DAY      86400
  44 #define DEFAULT_TIMEZONE        28800
  45 #define DO_GMTIME                   0
  46 #define DO_LOCALTIME                1
  47
  48
  49 long timezone ; // global variable
  50
  51
  52 ////////////////////////////////////////////////////////////////////////
  53 // Common code for localtime and gmtime (static)
  54 ////////////////////////////////////////////////////////////////////////
  55
  56 static struct tm * __cdecl common_localtime(const time_t *t, BOOL bLocal)
  57 {
  58     wxLongLong i64;
  59     FILETIME   ft;
  60     wxString str ;
  61     SYSTEMTIME SystemTime;
  62     TIME_ZONE_INFORMATION pTz;
  63     static struct tm st_res ;             // data holder
  64     static struct tm * res = &st_res ;    // data pointer
  65     int iLeap;
  66     const unsigned short int __mon_yday[2][13] =
  67     {
  68         // Normal years
  69         { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
  70         // Leap years
  71         { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
  72     };
  73
  74     if (!*t)
  75         ::GetLocalTime(&SystemTime);
  76     else
  77     {
  78         i64 = *t;
  79         i64 = i64 * 10000000 + 116444736000000000;
  80
  81         ft.dwLowDateTime  = i64.GetLo();
  82         ft.dwHighDateTime = i64.GetHi();
  83
  84         ::FileTimeToSystemTime(&ft, &SystemTime);
  85     }
  86
  87     ::GetTimeZoneInformation(&pTz);
  88
  89     ///////////////////////////////////////////////
  90     // Set timezone
  91     timezone = pTz.Bias * SECONDS_IN_ONE_MINUTE ;
  92     ///////////////////////////////////////////////
  93
  94     iLeap = is_leap(SystemTime.wYear) ;
  95
  96     res->tm_hour = SystemTime.wHour;
  97     res->tm_min  = SystemTime.wMinute;
  98     res->tm_sec  = SystemTime.wSecond;
  99
 100     res->tm_mday = SystemTime.wDay;
 101     res->tm_mon = SystemTime.wMonth - 1; // this the correct month but localtime returns month aligned to zero
 102     res->tm_year = SystemTime.wYear;     // this the correct year
 103     res->tm_year = res->tm_year - 1900;  // but localtime returns the value starting at the 1900
 104
 105     res->tm_wday = SystemTime.wDayOfWeek;
 106     res->tm_yday = __mon_yday[iLeap][res->tm_mon] + SystemTime.wDay - 1; // localtime returns year-day aligned to zero
 107
 108     // if localtime behavior and daylight saving
 109     if (bLocal && pTz.DaylightBias != 0)
 110         res->tm_isdst = 1;
 111     else
 112         res->tm_isdst = 0; // without daylight saving or gmtime
 113
 114     return res;
 115 }
 116
 117 extern "C"
 118 {
 119
 120 ////////////////////////////////////////////////////////////////////////
 121 // Receive the number of seconds elapsed since midnight(00:00:00)
 122 // and convert a time value and corrects for the local time zone
 123 ////////////////////////////////////////////////////////////////////////
 124 struct tm * __cdecl localtime(const time_t * t)
 125 {
 126     return common_localtime(t, DO_LOCALTIME) ;
 127 }
 128
 129 ////////////////////////////////////////////////////////////////////////
 130 // Receives the number of seconds elapsed since midnight(00:00:00)
 131 // and converts a time value WITHOUT correcting for the local time zone
 132 ////////////////////////////////////////////////////////////////////////
 133 struct tm * __cdecl gmtime(const time_t *t)
 134 {
 135     return common_localtime(t, DO_GMTIME) ;
 136 }
 137
 138 }
 139
 140 ////////////////////////////////////////////////////////////////////////
 141 // Common code for conversion of struct tm into time_t   (static)
 142 ////////////////////////////////////////////////////////////////////////
 143 static time_t __cdecl common_tm_to_time(int day, int month, int year, int hour, int minute, int second)
 144 {
 145     time_t prog = 0 ;
 146     static int mdays[12] = { 31,28,31,30,31,30,31,31,30,31,30,31 } ;
 147
 148     while (--month)
 149     {
 150         prog += mdays[month - 1] ;
 151         if (month == 2 && is_leap(year))
 152             prog++ ;
 153     }
 154
 155     // Calculate seconds in elapsed days
 156     prog = day - 1 ;        // align first day of the year to zero
 157     prog += (DAYS_IN_ONE_YEAR * (year - 1970) + (year - 1901) / 4 - 19) ;
 158     prog *= SECONDS_IN_ONE_DAY ;
 159
 160     // Add Calculated elapsed seconds in the current day
 161     prog += (hour * SECONDS_IN_ONE_HOUR + minute *
 162                                SECONDS_IN_ONE_MIN + second) ;
 163
 164     return prog ;
 165 }
 166
 167 extern "C"
 168 {
 169
 170 ////////////////////////////////////////////////////////////////////////
 171 // Returns the number of seconds elapsed since
 172 // midnight(00:00:00) of 1 January 1970
 173 ////////////////////////////////////////////////////////////////////////
 174 time_t __cdecl time(time_t *t)
 175 {
 176     time_t prog = 0 ;
 177
 178     if (t != NULL)
 179     {
 180         SYSTEMTIME SystemTime;
 181
 182         ::GetLocalTime(&SystemTime) ;
 183         prog = common_tm_to_time(SystemTime.wDay, SystemTime.wMonth, SystemTime.wYear,
 184                                  SystemTime.wHour, SystemTime.wMinute, SystemTime.wSecond) ;
 185         *t = prog ;
 186     }
 187
 188     return prog ;
 189 }
 190
 191 ////////////////////////////////////////////////////////////////////////
 192 // Converts the local time provided by struct tm
 193 // into a time_t calendar value
 194 ////////////////////////////////////////////////////////////////////////
 195 time_t __cdecl mktime(struct tm *t)
 196 {
 197     return (common_tm_to_time(t->tm_mday, t->tm_mon+1, t->tm_year+1900, t->tm_hour, t->tm_min, t->tm_sec)) ;
 198 }
 199
 200
 201 size_t __cdecl wcsftime(wchar_t *, size_t, const wchar_t *, const struct tm *)
 202 {
 203     // TODO : maybe copy something from wxString::Printf
 204
 205     return 0;
 206 }
 207
 208 } // extern "C"