-- |
-- Module : System.Time
-- Copyright : (c) The University of Glasgow 2001
--- License : BSD-style (see the file libraries/core/LICENSE)
+-- License : BSD-style (see the file libraries/base/LICENSE)
--
-- Maintainer : libraries@haskell.org
-- Stability : provisional
-- Portability : portable
--
--- $Id: Time.hsc,v 1.12 2002/04/24 16:31:45 simonmar Exp $
---
-- The standard Time library.
--
-----------------------------------------------------------------------------
) where
+#ifdef __GLASGOW_HASKELL__
#include "HsBase.h"
+#endif
+
+#ifdef __NHC__
+#include <time.h>
+# ifdef __sun
+# define HAVE_TZNAME 1
+# else
+# define HAVE_TM_ZONE 1
+# endif
+import Ix
+#endif
import Prelude
import Data.Ix
import System.Locale
import System.IO.Unsafe
-
+
+#ifdef __HUGS__
+import Hugs.Time ( getClockTimePrim, toCalTimePrim, toClockTimePrim )
+#else
import Foreign
import Foreign.C
+#endif
-- One way to partition and give name to chunks of a year and a week:
-- -----------------------------------------------------------------------------
-- getClockTime returns the current time in its internal representation.
-#if HAVE_GETTIMEOFDAY
+getClockTime :: IO ClockTime
+#ifdef __HUGS__
getClockTime = do
+ (sec,usec) <- getClockTimePrim
+ return (TOD (fromIntegral sec) ((fromIntegral usec) * 1000000))
+
+#elif HAVE_GETTIMEOFDAY
+getClockTime = do
+ let realToInteger = round . realToFrac :: Real a => a -> Integer
allocaBytes (#const sizeof(struct timeval)) $ \ p_timeval -> do
throwErrnoIfMinus1_ "getClockTime" $ gettimeofday p_timeval nullPtr
sec <- (#peek struct timeval,tv_sec) p_timeval :: IO CTime
usec <- (#peek struct timeval,tv_usec) p_timeval :: IO CTime
- return (TOD (fromIntegral sec) ((fromIntegral usec) * 1000000))
+ return (TOD (realToInteger sec) ((realToInteger usec) * 1000000))
#elif HAVE_FTIME
getClockTime = do
+ let realToInteger = round . realToFrac :: Real a => a -> Integer
allocaBytes (#const sizeof(struct timeb)) $ \ p_timeb -> do
ftime p_timeb
sec <- (#peek struct timeb,time) p_timeb :: IO CTime
msec <- (#peek struct timeb,millitm) p_timeb :: IO CUShort
- return (TOD (fromIntegral sec) (fromIntegral msec * 1000000000))
+ return (TOD (realToInteger sec) (fromIntegral msec * 1000000000))
#else /* use POSIX time() */
getClockTime = do
secs <- time nullPtr -- can't fail, according to POSIX
- return (TOD (fromIntegral secs) 0)
+ let realToInteger = round . realToFrac :: Real a => a -> Integer
+ return (TOD (realToInteger secs) 0)
#endif
cal = toUTCTime (TOD (c_sec + sec_diff) (c_psec + psec))
-- FIXME! ^^^^
new_mon = fromEnum (ctMonth cal) + r_mon
- (month', yr_diff)
+ month' = fst tmp
+ yr_diff = snd tmp
+ tmp
| new_mon < 0 = (toEnum (12 + new_mon), (-1))
| new_mon > 11 = (toEnum (new_mon `mod` 12), 1)
| otherwise = (toEnum new_mon, 0)
, tdSec = diffSecs
}
+#ifndef __HUGS__
-- -----------------------------------------------------------------------------
-- How do we deal with timezones on this architecture?
# define tzname _tzname
# endif
# ifndef mingw32_TARGET_OS
-foreign import ccall unsafe "&tzname" tzname :: Ptr (Ptr CChar)
-foreign import ccall unsafe "timezone" timezone :: Ptr CLong
+foreign import ccall unsafe "time.h &tzname" tzname :: Ptr (Ptr CChar)
# else
foreign import ccall unsafe "__hscore_timezone" timezone :: Ptr CLong
foreign import ccall unsafe "__hscore_tzname" tzname :: Ptr (Ptr CChar)
# endif /* ! HAVE_TZNAME */
-- Get the offset in secs from UTC, if (struct tm) doesn't supply it. */
-#if defined(mingw32_TARGET_OS)
-#define timezone _timezone
-#endif
-
-# if HAVE_ALTZONE
-foreign import ccall "&altzone" :: Ptr CTime
-foreign import ccall "&timezone" :: Ptr CTime
+# if HAVE_DECL_ALTZONE
+foreign import ccall "&altzone" altzone :: Ptr CTime
+foreign import ccall "&timezone" timezone :: Ptr CTime
gmtoff x = do
dst <- (#peek struct tm,tm_isdst) x
tz <- if dst then peek altzone else peek timezone
- return (fromIntegral tz)
-# define GMTOFF(x) (((struct tm *)x)->tm_isdst ? altzone : timezone )
-# else /* ! HAVE_ALTZONE */
+ return (-fromIntegral tz)
+# else /* ! HAVE_DECL_ALTZONE */
+
+#if !defined(mingw32_TARGET_OS)
+foreign import ccall "time.h &timezone" timezone :: Ptr CLong
+#endif
+
-- Assume that DST offset is 1 hour ...
gmtoff x = do
dst <- (#peek struct tm,tm_isdst) x
tz <- peek timezone
- if dst then return (fromIntegral tz - 3600) else return tz
-# endif /* ! HAVE_ALTZONE */
+ -- According to the documentation for tzset(),
+ -- http://www.opengroup.org/onlinepubs/007908799/xsh/tzset.html
+ -- timezone offsets are > 0 west of the Prime Meridian.
+ --
+ -- This module assumes the interpretation of tm_gmtoff, i.e., offsets
+ -- are > 0 East of the Prime Meridian, so flip the sign.
+ return (- (if dst then (fromIntegral tz - 3600) else tz))
+# endif /* ! HAVE_DECL_ALTZONE */
#endif /* ! HAVE_TM_ZONE */
+#endif /* ! __HUGS__ */
-- -----------------------------------------------------------------------------
-- toCalendarTime t converts t to a local time, modified by
toCalendarTime :: ClockTime -> IO CalendarTime
-#if HAVE_LOCALTIME_R
+#ifdef __HUGS__
+toCalendarTime = toCalTime False
+#elif HAVE_LOCALTIME_R
toCalendarTime = clockToCalendarTime_reentrant (throwAwayReturnPointer localtime_r) False
#else
toCalendarTime = clockToCalendarTime_static localtime False
#endif
-toUTCTime :: ClockTime -> CalendarTime
-#if HAVE_GMTIME_R
+toUTCTime :: ClockTime -> CalendarTime
+#ifdef __HUGS__
+toUTCTime = unsafePerformIO . toCalTime True
+#elif HAVE_GMTIME_R
toUTCTime = unsafePerformIO . clockToCalendarTime_reentrant (throwAwayReturnPointer gmtime_r) True
#else
toUTCTime = unsafePerformIO . clockToCalendarTime_static gmtime True
#endif
+#ifdef __HUGS__
+toCalTime :: Bool -> ClockTime -> IO CalendarTime
+toCalTime toUTC (TOD s psecs)
+ | (s > fromIntegral (maxBound :: Int)) ||
+ (s < fromIntegral (minBound :: Int))
+ = error ((if toUTC then "toUTCTime: " else "toCalendarTime: ") ++
+ "clock secs out of range")
+ | otherwise = do
+ (sec,min,hour,mday,mon,year,wday,yday,isdst,zone,off) <-
+ toCalTimePrim (if toUTC then 1 else 0) (fromIntegral s)
+ return (CalendarTime{ ctYear=1900+year
+ , ctMonth=toEnum mon
+ , ctDay=mday
+ , ctHour=hour
+ , ctMin=min
+ , ctSec=sec
+ , ctPicosec=psecs
+ , ctWDay=toEnum wday
+ , ctYDay=yday
+ , ctTZName=(if toUTC then "UTC" else zone)
+ , ctTZ=(if toUTC then 0 else off)
+ , ctIsDST=not toUTC && (isdst/=0)
+ })
+#else /* ! __HUGS__ */
throwAwayReturnPointer :: (Ptr CTime -> Ptr CTm -> IO (Ptr CTm))
-> (Ptr CTime -> Ptr CTm -> IO ( ))
throwAwayReturnPointer fun x y = fun x y >> return ()
clockToCalendarTime_static :: (Ptr CTime -> IO (Ptr CTm)) -> Bool -> ClockTime
-> IO CalendarTime
clockToCalendarTime_static fun is_utc (TOD secs psec) = do
- withObject (fromIntegral secs :: CTime) $ \ p_timer -> do
+ with (fromIntegral secs :: CTime) $ \ p_timer -> do
p_tm <- fun p_timer -- can't fail, according to POSIX
clockToCalendarTime_aux is_utc p_tm psec
clockToCalendarTime_reentrant :: (Ptr CTime -> Ptr CTm -> IO ()) -> Bool -> ClockTime
-> IO CalendarTime
clockToCalendarTime_reentrant fun is_utc (TOD secs psec) = do
- withObject (fromIntegral secs :: CTime) $ \ p_timer -> do
+ with (fromIntegral secs :: CTime) $ \ p_timer -> do
allocaBytes (#const sizeof(struct tm)) $ \ p_tm -> do
fun p_timer p_tm
clockToCalendarTime_aux is_utc p_tm psec
(if is_utc then "UTC" else tzname)
(if is_utc then 0 else fromIntegral tz)
(if is_utc then False else isdst /= 0))
-
+#endif /* ! __HUGS__ */
toClockTime :: CalendarTime -> ClockTime
+#ifdef __HUGS__
+toClockTime (CalendarTime yr mon mday hour min sec psec
+ _wday _yday _tzname tz _isdst) =
+ unsafePerformIO $ do
+ s <- toClockTimePrim (yr-1900) (fromEnum mon) mday hour min sec tz
+ return (TOD (fromIntegral s) psec)
+#else /* ! __HUGS__ */
toClockTime (CalendarTime year mon mday hour min sec psec
_wday _yday _tzname tz isdst) =
-- result.
--
gmtoff <- gmtoff p_tm
- let res = fromIntegral t - tz + fromIntegral gmtoff
- return (TOD (fromIntegral res) psec)
+ let realToInteger = round . realToFrac :: Real a => a -> Integer
+ res = realToInteger t - fromIntegral tz + fromIntegral gmtoff
+ return (TOD res psec)
+#endif /* ! __HUGS__ */
-- -----------------------------------------------------------------------------
-- Converting time values to strings.
addS v s = if abs v == 1 then fst s else snd s
-
+#ifndef __HUGS__
-- -----------------------------------------------------------------------------
-- Foreign time interface (POSIX)
type CTm = () -- struct tm
#if HAVE_LOCALTIME_R
-foreign import ccall unsafe localtime_r :: Ptr CTime -> Ptr CTm -> IO (Ptr CTm)
+foreign import ccall unsafe "time.h localtime_r"
+ localtime_r :: Ptr CTime -> Ptr CTm -> IO (Ptr CTm)
#else
-foreign import ccall unsafe localtime :: Ptr CTime -> IO (Ptr CTm)
+foreign import ccall unsafe "time.h localtime"
+ localtime :: Ptr CTime -> IO (Ptr CTm)
#endif
#if HAVE_GMTIME_R
-foreign import ccall unsafe gmtime_r :: Ptr CTime -> Ptr CTm -> IO (Ptr CTm)
+foreign import ccall unsafe "time.h gmtime_r"
+ gmtime_r :: Ptr CTime -> Ptr CTm -> IO (Ptr CTm)
#else
-foreign import ccall unsafe gmtime :: Ptr CTime -> IO (Ptr CTm)
+foreign import ccall unsafe "time.h gmtime"
+ gmtime :: Ptr CTime -> IO (Ptr CTm)
#endif
-foreign import ccall unsafe mktime :: Ptr CTm -> IO CTime
-foreign import ccall unsafe time :: Ptr CTime -> IO CTime
+foreign import ccall unsafe "time.h mktime"
+ mktime :: Ptr CTm -> IO CTime
+foreign import ccall unsafe "time.h time"
+ time :: Ptr CTime -> IO CTime
#if HAVE_GETTIMEOFDAY
type CTimeVal = ()
-foreign import ccall unsafe gettimeofday :: Ptr CTimeVal -> Ptr () -> IO CInt
+foreign import ccall unsafe "time.h gettimeofday"
+ gettimeofday :: Ptr CTimeVal -> Ptr () -> IO CInt
#endif
#if HAVE_FTIME
type CTimeB = ()
#ifndef mingw32_TARGET_OS
-foreign import ccall unsafe ftime :: Ptr CTimeB -> IO CInt
+foreign import ccall unsafe "time.h ftime" ftime :: Ptr CTimeB -> IO CInt
#else
-foreign import ccall unsafe ftime :: Ptr CTimeB -> IO ()
+foreign import ccall unsafe "time.h ftime" ftime :: Ptr CTimeB -> IO ()
#endif
#endif
+#endif /* ! __HUGS__ */
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