libjava/java/util/natGregorianCalendar.cc

   1 /* Copyright (C) 1998, 1999  Red Hat, Inc.
   2
   3    This file is part of libgcj.
   4
   5 This software is copyrighted work licensed under the terms of the
   6 Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
   7 details.  */
   8
   9 #include <config.h>
  10
  11 // We want to make sure to pick up the POSIX `_r' functions.  Some
  12 // systems, such as Solaris 2.6, require this define in order to
  13 // declare the functions in the appropriate header.
  14 #if defined (HAVE_GMTIME_R) || defined (HAVE_LOCALTIME_R)
  15 #  define _POSIX_PTHREAD_SEMANTICS
  16 #  ifndef _REENTRANT
  17 #    define _REENTRANT
  18 #  endif /* _REENTRANT */
  19 #endif
  20
  21 #ifdef ECOS
  22 #include <string.h>
  23 #endif
  24
  25 #include <gcj/cni.h>
  26 #include <java/util/TimeZone.h>
  27 #include <java/util/GregorianCalendar.h>
  28 #include <time.h>
  29
  30 void
  31 java::util::GregorianCalendar::computeTime ()
  32 {
  33   struct tm tim;
  34   tim.tm_sec = elements(fields)[SECOND];
  35   tim.tm_min = elements(fields)[MINUTE];
  36   tim.tm_hour = elements(fields)[HOUR_OF_DAY];
  37   tim.tm_mday = elements(fields)[DATE];
  38   tim.tm_mon = elements(fields)[MONTH];
  39   tim.tm_year = elements(fields)[YEAR] - 1900;
  40   tim.tm_isdst = 0;  // FIXME
  41 #ifndef ECOS
  42   // FIXME: None of the standard C library access to the ECOS calendar
  43   // is yet available.
  44   time_t t = mktime (&tim);
  45 #else
  46   time_t t = 0;
  47 #endif
  48
  49   // Adjust for local timezone (introduced by mktime) and our
  50   // timezone.
  51 #if defined (STRUCT_TM_HAS_GMTOFF)
  52   t += tim.tm_gmtoff;
  53 #elif defined (HAVE_TIMEZONE)
  54   t -= timezone;
  55 #endif
  56   java::util::TimeZone *zone = getTimeZone ();
  57   t += zone->getRawOffset();
  58
  59   // Adjust for milliseconds.
  60   time = t * (jlong) 1000 + elements(fields)[MILLISECOND];
  61
  62   isTimeSet = true;
  63 }
  64
  65 void
  66 java::util::GregorianCalendar::computeFields ()
  67 {
  68   time_t t = time / 1000;
  69   int millis = time % 1000;
  70   if (t < 0 && millis != 0)
  71     {
  72       t--;
  73       millis = t - 1000 * t;
  74     }
  75   elements(fields)[MILLISECOND] = millis;
  76   struct tm tim;
  77   java::util::TimeZone *zone = getTimeZone ();
  78
  79   // FIXME: None of the standard C library access to the ECOS calendar
  80   // is yet available.
  81 #ifdef ECOS
  82   memset (&tim, 0, sizeof tim);
  83 #else
  84   if (zone->getRawOffset() == 0 || ! zone->useDaylightTime())
  85     {
  86 #if defined(__JV_POSIX_THREADS__) && defined(HAVE_GMTIME_R)
  87       gmtime_r (&t, &tim);
  88 #else
  89       // Get global lock (because gmtime uses a global buffer).  FIXME
  90       tim = *(struct tm*) gmtime (&t);
  91       // Release global lock.  FIXME
  92 #endif
  93     }
  94   else
  95     {
  96 #if defined(__JV_POSIX_THREADS__) && defined(HAVE_LOCALTIME_R)
  97       localtime_r (&t, &tim);
  98 #else
  99       // Get global lock (because localtime uses a global buffer).  FIXME
 100       tim = *(struct tm*) localtime (&t);
 101       // Release global lock.  FIXME
 102 #endif
 103     }
 104 #endif /* ECOS */
 105   elements(fields)[SECOND] = tim.tm_sec;
 106   elements(fields)[MINUTE] = tim.tm_min;
 107   elements(fields)[HOUR_OF_DAY] = tim.tm_hour;
 108   elements(fields)[AM_PM] = tim.tm_hour < 12 ? AM : PM;
 109   elements(fields)[HOUR] = tim.tm_hour % 12;
 110   elements(fields)[DATE] = tim.tm_mday;
 111   elements(fields)[MONTH] = tim.tm_mon;
 112   elements(fields)[YEAR] = 1900 + tim.tm_year;
 113   elements(fields)[DAY_OF_WEEK] = tim.tm_wday + 1;
 114   elements(fields)[DAY_OF_WEEK_IN_MONTH] = ((tim.tm_mday - 1) / 7) + 1;
 115   elements(fields)[DAY_OF_YEAR] = tim.tm_yday + 1;
 116   elements(fields)[WEEK_OF_MONTH]
 117     = (tim.tm_mday + 6 + (5 - tim.tm_wday + getFirstDayOfWeek()) % 7) / 7;
 118   elements(fields)[WEEK_OF_YEAR]
 119     = (tim.tm_yday + 7 + (5 - tim.tm_wday + getFirstDayOfWeek()) % 7) / 7;
 120   elements(fields)[ERA] = AD;
 121   elements(fields)[DST_OFFSET] = tim.tm_isdst <= 0 ? 0 : 60*60*1000;
 122   elements(fields)[ZONE_OFFSET] = getTimeZone()->getRawOffset();
 123   areFieldsSet = true;
 124 }