src/common/time.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        time.cpp
   3 // Purpose:     wxTime class, from NIHCL
   4 // Author:      Julian Smart, after K. E. Gorlen
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "time.h"
  14 #endif
  15
  16 /*
  17 Provides an object that represents a Time, stored as the number of
  18 seconds since January 1, 1901, GMT.
  19 */
  20
  21 // For compilers that support precompilation, includes "wx.h".
  22 #include "wx/wxprec.h"
  23
  24 #ifdef __BORLANDC__
  25 #pragma hdrstop
  26 #endif
  27
  28 #include "wx/setup.h"
  29
  30 #if wxUSE_TIMEDATE
  31
  32 #include "wx/time.h"
  33 #include "wx/date.h"
  34 #include "wx/utils.h"
  35 #include <wx/intl.h>
  36
  37 #if wxUSE_IOSTREAMH
  38 #include <iostream.h>
  39 #else
  40 #include <iostream>
  41 #endif
  42
  43 #include <iomanip.h>
  44 #include <string.h>
  45
  46 #if !USE_SHARED_LIBRARY
  47 IMPLEMENT_DYNAMIC_CLASS(wxTime, wxObject)
  48 #endif
  49
  50
  51 extern bool wxGetLocalTime(long *timeZone, int *dstObserved);
  52 extern long wxGetCurrentTime(void);
  53
  54 static long TIME_ZONE;          /* seconds west of GMT */
  55 static int DST_OBSERVED;        /* flags U.S. daylight saving time observed */
  56
  57 static bool wxTimeInitialized = FALSE;
  58
  59 wxTime::tFormat         wxTime::Format          = wxTime::wx12h;
  60 wxTime::tPrecision      wxTime::Precision       = wxTime::wxStdMinSec;
  61
  62 static const unsigned long seconds_in_day = 24*60*60L;
  63 static const wxDate refDate(1,1,1901);
  64 // static const wxDate maxDate(49709L);      /* ((2**32)-1)/seconds_in_day -1 */
  65
  66 wxTime wxTime::GetLocalTime(const wxDate& date, hourTy h, minuteTy m, secondTy s)
  67 /*
  68                   Return a local wxTime for the specified Standard Time date, hour, minute,
  69                   and second.
  70 */
  71 {
  72   if (!wxTimeInitialized)
  73   {
  74          wxGetLocalTime(&TIME_ZONE, &DST_OBSERVED);
  75          wxTimeInitialized = TRUE;
  76   }
  77 /*
  78                   if (!date.IsBetween(refDate,maxDate))
  79                                          setError(NIHCL_DATERANGE,DEFAULT,
  80                                                                 date.dayOfMonth(),date.nameOfMonth(),date.year());
  81 */
  82   // The following line causes an error in GCC 2.1
  83 //   long daysBetween = date-refDate;
  84   // ... but this seems to get round it.
  85   wxDate tmp1(date);
  86   wxDate tmp2(refDate);
  87   long daysBetween = tmp1 - tmp2;
  88
  89   return wxTime(seconds_in_day*daysBetween + 60*60L*h + 60*m + s);
  90 }
  91
  92 wxTime::wxTime()
  93 /*
  94                   Construct a wxTime for this instant.
  95 */
  96 {
  97   if (!wxTimeInitialized)
  98   {
  99          wxGetLocalTime(&TIME_ZONE, &DST_OBSERVED);
 100          wxTimeInitialized = TRUE;
 101   }
 102   sec = wxGetCurrentTime();
 103   sec += 2177452800UL;     /* seconds from 1/1/01 to 1/1/70 */
 104 }
 105
 106 wxTime::wxTime(hourTy h, minuteTy m, secondTy s, bool dst)
 107 /*
 108                   Construct a wxTime for today at the specified (local) hour, minute, and
 109                   second.
 110 */
 111 {
 112   if (!wxTimeInitialized)
 113   {
 114          wxGetLocalTime(&TIME_ZONE, &DST_OBSERVED);
 115          wxTimeInitialized = TRUE;
 116   }
 117
 118   sec = wxTime(wxDate(),h,m,s,dst).sec;
 119 }
 120
 121
 122 wxTime::wxTime(const wxDate& date, hourTy h, minuteTy m, secondTy s, bool dst)
 123 /*
 124         Construct a wxTime for the specified (local) Date, hour, minute, and
 125         second.
 126 */
 127 {
 128   if (!wxTimeInitialized)
 129   {
 130     wxGetLocalTime(&TIME_ZONE, &DST_OBSERVED);
 131          wxTimeInitialized = TRUE;
 132   }
 133   sec = GetLocalTime(date,h,m,s).sec-3600;
 134   if (IsDST())
 135   {
 136     sec += 3600;
 137     if (IsDST() || dst) sec -= 3600;
 138   }
 139   else
 140   {
 141     sec += 3600;
 142 /*
 143                 if (IsDST()) setError(NIHCL_BADTIME,DEFAULT,
 144                                                                 date.dayOfMonth(),date.nameOfMonth(),date.year(),
 145                                                                 h,m,s,(dst?_("DST"):""));
 146 */
 147   }
 148   sec += TIME_ZONE;                               // adjust to GMT
 149 }
 150
 151 wxTime::operator wxDate() const
 152 /*
 153                   Convert a wxTime to a local wxDate
 154 */
 155 {
 156 //      return wxDate((int)(GetLocalTime().sec/seconds_in_day));     4.2 cc bug
 157                   long daycount = (long)(GetLocalTime().sec/seconds_in_day);
 158
 159         wxDate date(1,1,1901);
 160         date += daycount;
 161         return date;
 162 }
 163
 164 bool wxTime::IsBetween(const wxTime& a, const wxTime& b) const
 165 {
 166         return *this >= a && *this <= b;
 167 }
 168
 169 hourTy wxTime::GetHour() const
 170 /*
 171                   Return the hour of this wxTime in local time; i.e., adjust for
 172         time zone and Daylight Savings Time.
 173 */
 174 {
 175                   return GetLocalTime().GetHourGMT();
 176 }
 177
 178 hourTy wxTime::GetHourGMT() const
 179 /*
 180         Return the hour of this Time in GMT.
 181 */
 182 {
 183                   return (hourTy)((sec % 86400) / 3600);
 184 }
 185
 186 wxTime wxTime::GetBeginDST(unsigned year)
 187 /*
 188                   Return the local Standard Time at which Daylight Savings Time
 189         begins in the specified year.
 190 */
 191 {
 192         // Previous Sunday
 193         wxTime DSTtime(GetLocalTime(wxDate(3,31,year).Previous(1)+7,2));
 194         if (year<=1986) {
 195                 // Previous Sunday
 196                                          DSTtime = GetLocalTime(wxDate(4,30,year).Previous(1),2);
 197                                          if (year==1974) DSTtime = GetLocalTime(wxDate(1,6,1974),2);
 198                 if (year==1975) DSTtime = GetLocalTime(wxDate(2,23,1975),2);
 199         }
 200         return DSTtime;
 201 }
 202
 203 wxTime wxTime::GetEndDST(unsigned year)
 204 /*
 205         Return the local Standard Time at which Daylight Savings Time
 206         ends in the specified year.
 207 */
 208 {
 209                   wxTime STDtime(GetLocalTime(wxDate(10,31,year).Previous(1),2-1));
 210                   return STDtime;
 211 }
 212
 213 bool wxTime::IsDST() const
 214 /*
 215         Return TRUE if this local Standard Time should be adjusted
 216         for Daylight Savings Time.
 217 */
 218 {
 219         long daycount = (long)(sec/seconds_in_day);
 220
 221         // At this point, daycount is the number of days from 1/1/1901.
 222                   // Need to convert to julian date (which starts at 1/1/4713 B.C.)
 223                   wxDate date(1,1,1901);
 224         date += daycount;
 225
 226         unsigned year = date.GetYear();
 227                   if (DST_OBSERVED)
 228         {
 229                 if (*this >= GetBeginDST(year))
 230                         if (*this < GetEndDST(year)) return TRUE;
 231         }
 232         return FALSE;
 233 }
 234
 235 wxTime wxTime::GetLocalTime() const
 236 /*
 237         Adjusts this GM Time for local time zone and Daylight Savings Time.
 238 */
 239 {
 240                   wxTime local_time(sec-TIME_ZONE);
 241         if (local_time.IsDST()) local_time.sec += 3600;
 242         return local_time;
 243 }
 244
 245 minuteTy wxTime::GetMinute() const
 246 /*
 247         Return the minute of this wxTime in local time; i.e., adjust
 248                   for time zone and Daylight Savings Time.
 249 */
 250 {
 251         return GetLocalTime().GetMinuteGMT();
 252 }
 253
 254 minuteTy wxTime::GetMinuteGMT() const
 255 /*
 256         Return the minute of this wxTime in GMT.
 257 */
 258 {
 259                   return (minuteTy)(((sec % 86400) % 3600) / 60);
 260 }
 261
 262 secondTy wxTime::GetSecond() const
 263 /*
 264         Return the second of this wxTime.
 265 */
 266 {
 267                   return (secondTy)(((sec % 86400) % 3600) % 60);
 268 }
 269
 270 wxTime wxTime::Max(const wxTime& t) const
 271 {
 272         if (t < *this) return *this;
 273         return t;
 274 }
 275
 276 wxTime wxTime::Min(const wxTime& t) const
 277 {
 278         if (t > *this) return *this;
 279                   return t;
 280 }
 281
 282 wxTime::operator char *(void)
 283 {
 284   return FormatTime();
 285 }
 286
 287 void wxTime::SetFormat(const wxTime::tFormat lFormat,
 288                                                           const wxTime::tPrecision lPrecision) {
 289
 290         wxTime::Format          = lFormat;
 291         wxTime::Precision       = lPrecision;
 292 }
 293
 294 char *wxTime::FormatTime() const {
 295         static char     timeBuf[30];
 296         unsigned                hh(GetHour());
 297
 298         switch (Format) {
 299         case wx12h:
 300                 hh      -= 12;
 301                 break;
 302         case wx24h:
 303                 break;
 304         }
 305
 306         switch (Precision) {
 307         case wxStdMinSec:
 308                 sprintf(timeBuf,"%2d:%02d:%02d",hh,GetMinute(),GetSecond());
 309                 break;
 310         case wxStdMin:
 311                 sprintf(timeBuf,"%2d:%02d",hh,GetMinute());
 312                 break;
 313         }
 314
 315         if (Format == wx12h)
 316                 if (GetHour() <= 12)
 317                         strcat(timeBuf,_("am"));
 318                 else
 319                         strcat(timeBuf,_("pm"));
 320
 321         return timeBuf;
 322 }
 323
 324 /*
 325 int wxTime::compare(const Object& ob) const
 326 {
 327                   assertArgSpecies(ob,classDesc,"compare");
 328         register clockTy t = castdown(ob).sec;
 329         if (sec < t) return -1;
 330         if (sec > t) return 1;
 331         return 0;
 332 }
 333
 334 void wxTime::deepenShallowCopy()  {}
 335
 336 unsigned wxTime::hash() const     { return sec; }
 337
 338 bool wxTime::isEqual(const Object& ob) const
 339 {
 340         return ob.isSpecies(classDesc) && *this==castdown(ob);
 341 }
 342
 343 const Class* wxTime::species() const { return &classDesc; }
 344
 345 void wxTime::printOn(ostream& strm) const
 346 {
 347         register unsigned hh = GetHour();
 348         wxDate(*this).printOn(strm);
 349         strm << ' ' << ((hh <= 12) ? hh : hh-12) << ':'
 350              << setfill('0') << setw(2) << GetMinute() << ':'
 351                                  << setfill('0') << setw(2) << GetSecond() << ' ';
 352         if (hh < 12) strm << _("am");
 353         else strm << _("pm");
 354 }
 355
 356 wxTime::wxTime(OIOin& strm)
 357                   : BASE(strm)
 358 {
 359                   unsigned long usec;
 360                   strm >> sec >> usec;
 361 }
 362
 363 void wxTime::storer(OIOout& strm) const
 364 {
 365         BASE::storer(strm);
 366         strm << sec << 0l;
 367 }
 368
 369
 370 wxTime::wxTime(OIOifd& fd)
 371                   : BASE(fd)
 372 {
 373                   unsigned long usec;
 374                   fd >> sec >> usec;
 375 }
 376
 377 void wxTime::storer(OIOofd& fd) const
 378 {
 379                   BASE::storer(fd);
 380                   fd << sec << 0l;
 381 }
 382 */
 383
 384 #endif