[project @ 2001-07-16 09:23:24 by rrt]

[ghc-hetmet.git] / ghc / lib / std / Time.hsc

diff --git a/ghc/lib/std/Time.hsc b/ghc/lib/std/Time.hsc
index f687944..d6692f7 100644 (file)
--- a/ghc/lib/std/Time.hsc
+++ b/ghc/lib/std/Time.hsc
@@ -3,7 +3,7 @@
 -- to compile on sparc-solaris.  Blargh.
 
 -- -----------------------------------------------------------------------------
--- $Id: Time.hsc,v 1.8 2001/01/26 17:51:54 rrt Exp $
+-- $Id: Time.hsc,v 1.16 2001/07/13 11:48:52 rrt Exp $
 --
 -- (c) The University of Glasgow, 1995-2001
 --
@@ -69,6 +69,9 @@ module Time
      ,  Day(..)
 
      ,  ClockTime(..) -- non-standard, lib. report gives this as abstract
+       -- instance Eq, Ord
+       -- instance Show (non-standard)
+
      , getClockTime
 
      ,  TimeDiff(..)
@@ -89,26 +92,7 @@ module Time
 
      ) where
 
-#include "config.h"
-
-#if defined(HAVE_GETTIMEOFDAY)
-#  ifdef HAVE_SYS_TIME_H
-#   include <sys/time.h>
-#  endif
-#elif defined(HAVE_GETCLOCK)
-# ifdef HAVE_SYS_TIMERS_H
-#  define POSIX_4D9 1
-#  include <sys/timers.h>
-# endif
-#elif defined(HAVE_TIME_H)
-# include <time.h>
-#endif
-
-#ifdef HAVE_WINDOWS_H
-#include <windows.h>
-#include <sys/types.h>
-#include <sys/timeb.h>
-#endif
+#include "HsStd.h"
 
 import Ix
 import Locale
@@ -149,24 +133,13 @@ data ClockTime = TOD Integer              -- Seconds since 00:00:00 on 1 Jan 1970
                     Integer            -- Picoseconds with the specified second
               deriving (Eq, Ord)
 
--- When a @ClockTime@ is shown, it is converted to a string of the form
--- @"Mon Nov 28 21:45:41 GMT 1994"@.
-
--- For now, we are restricted to roughly:
--- Fri Dec 13 20:45:52 1901 through Tue Jan 19 03:14:07 2038, because
--- we use the C library routines based on 32 bit integers.
+-- When a ClockTime is shown, it is converted to a CalendarTime in the current
+-- timezone and then printed.  FIXME: This is arguably wrong, since we can't
+-- get the current timezone without being in the IO monad.
 
 instance Show ClockTime where
-    showsPrec _ (TOD secs _nsec) = 
-      showString $ unsafePerformIO $ do
-           withObject (fromIntegral secs :: CTime)  $ \ p_timer -> do
-             p_tm <- localtime p_timer -- can't fail, according to POSIX
-             allocaBytes 64 $ \ p_buf -> do  -- big enough for error message
-               r <- strftime p_buf 50 "%a %b %d %H:%M:%S %Z %Y"## p_tm
-                if r == 0 
-                 then return "ClockTime.show{Time}: internal error"
-                 else peekCString p_buf
-
+    showsPrec _ t = showString (calendarTimeToString 
+                                (unsafePerformIO (toCalendarTime t)))
     showList = showList__ (showsPrec 0)
 
 {-
@@ -265,7 +238,10 @@ addToClockTime  :: TimeDiff  -> ClockTime -> ClockTime
 addToClockTime (TimeDiff year mon day hour min sec psec) 
               (TOD c_sec c_psec) = 
        let
-         sec_diff = fromInt sec + 60 * fromInt min + 3600 * fromInt hour + 24 * 3600 * fromInt day
+         sec_diff = toInteger sec +
+                     60 * toInteger min +
+                     3600 * toInteger hour +
+                     24 * 3600 * toInteger day
          cal      = toUTCTime (TOD (c_sec + sec_diff) (c_psec + psec))
                                                        -- FIXME! ^^^^
           new_mon  = fromEnum (ctMonth cal) + r_mon 
@@ -340,7 +316,7 @@ zone x      = (#peek struct tm,tm_zone) x
 gmtoff x    = (#peek struct tm,tm_gmtoff) x
 
 #else /* ! HAVE_TM_ZONE */
-# if HAVE_TZNAME || _WIN32
+# if HAVE_TZNAME || defined(_WIN32)
 #  if cygwin32_TARGET_OS
 #   define tzname _tzname
 #  endif
@@ -475,7 +451,7 @@ toClockTime (CalendarTime year mon mday hour min sec psec
         -- result.
         -- 
         gmtoff <- gmtoff p_tm
-       let res = fromIntegral t + tz - fromIntegral gmtoff
+       let res = fromIntegral t - tz + fromIntegral gmtoff
        return (TOD (fromIntegral res) 0)
 
 -- -----------------------------------------------------------------------------
@@ -619,7 +595,6 @@ type CTm = () -- struct tm
 
 foreign import unsafe localtime :: Ptr CTime -> IO (Ptr CTm)
 foreign import unsafe gmtime    :: Ptr CTime -> IO (Ptr CTm)
-foreign import unsafe strftime  :: Ptr CChar -> CSize -> Addr## -> Ptr CTm -> IO CSize
 foreign import unsafe mktime    :: Ptr CTm   -> IO CTime
 foreign import unsafe time      :: Ptr CTime -> IO CTime