1 -----------------------------------------------------------------------------
3 -- Module : System.Time
4 -- Copyright : (c) The University of Glasgow 2001
5 -- License : BSD-style (see the file libraries/base/LICENSE)
7 -- Maintainer : libraries@haskell.org
8 -- Stability : provisional
9 -- Portability : portable
11 -- The standard Time library.
13 -----------------------------------------------------------------------------
16 Haskell 98 Time of Day Library
17 ------------------------------
19 The Time library provides standard functionality for clock times,
20 including timezone information (i.e, the functionality of "time.h",
21 adapted to the Haskell environment), It follows RFC 1129 in its use of
22 Coordinated Universal Time (UTC).
24 2000/06/17 <michael.weber@post.rwth-aachen.de>:
26 * min./max. time diff currently is restricted to
27 [minBound::Int, maxBound::Int]
29 * surely other restrictions wrt. min/max bounds
35 `showTime' (used in `instance Show ClockTime') always prints time
36 converted to the local timezone (even if it is taken from
37 `(toClockTime . toUTCTime)'), whereas `calendarTimeToString'
38 honors the tzone & tz fields and prints UTC or whatever timezone
39 is stored inside CalendarTime.
41 Maybe `showTime' should be changed to use UTC, since it would
42 better correspond to the actual representation of `ClockTime'
43 (can be done by replacing localtime(3) by gmtime(3)).
47 * add proper handling of microsecs, currently, they're mostly
50 * `formatFOO' case of `%s' is currently broken...
54 * check for unusual date cases, like 1970/1/1 00:00h, and conversions
55 between different timezone's etc.
57 * check, what needs to be in the IO monad, the current situation
58 seems to be a bit inconsistent to me
60 * check whether `isDst = -1' works as expected on other arch's
63 * add functions to parse strings to `CalendarTime' (some day...)
65 * implement padding capabilities ("%_", "%-") in `formatFOO'
67 * add rfc822 timezone (+0200 is CEST) representation ("%z") in `formatFOO'
75 , ClockTime(..) -- non-standard, lib. report gives this as abstract
77 -- instance Show (non-standard)
82 , noTimeDiff -- non-standard (but useful when constructing TimeDiff vals.)
86 , normalizeTimeDiff -- non-standard
87 , timeDiffToString -- non-standard
88 , formatTimeDiff -- non-standard
94 , calendarTimeToString
99 #ifdef __GLASGOW_HASKELL__
106 # define HAVE_TZNAME 1
108 # define HAVE_TM_ZONE 1
117 import System.IO.Unsafe
120 import Hugs.Time ( getClockTimePrim, toCalTimePrim, toClockTimePrim )
126 -- One way to partition and give name to chunks of a year and a week:
129 = January | February | March | April
130 | May | June | July | August
131 | September | October | November | December
132 deriving (Eq, Ord, Enum, Bounded, Ix, Read, Show)
135 = Sunday | Monday | Tuesday | Wednesday
136 | Thursday | Friday | Saturday
137 deriving (Eq, Ord, Enum, Bounded, Ix, Read, Show)
139 -- @ClockTime@ is an abstract type, used for the internal clock time.
140 -- Clock times may be compared, converted to strings, or converted to an
141 -- external calendar time @CalendarTime@.
143 data ClockTime = TOD Integer -- Seconds since 00:00:00 on 1 Jan 1970
144 Integer -- Picoseconds with the specified second
147 -- When a ClockTime is shown, it is converted to a CalendarTime in the current
148 -- timezone and then printed. FIXME: This is arguably wrong, since we can't
149 -- get the current timezone without being in the IO monad.
151 instance Show ClockTime where
152 showsPrec _ t = showString (calendarTimeToString
153 (unsafePerformIO (toCalendarTime t)))
156 @CalendarTime@ is a user-readable and manipulable
157 representation of the internal $ClockTime$ type. The
158 numeric fields have the following ranges.
164 year -maxInt .. maxInt [Pre-Gregorian dates are inaccurate]
165 mon 0 .. 11 [Jan = 0, Dec = 11]
169 sec 0 .. 61 [Allows for two leap seconds]
170 picosec 0 .. (10^12)-1 [This could be over-precise?]
171 wday 0 .. 6 [Sunday = 0, Saturday = 6]
172 yday 0 .. 365 [364 in non-Leap years]
173 tz -43200 .. 43200 [Variation from UTC in seconds]
176 The {\em tzname} field is the name of the time zone. The {\em isdst}
177 field indicates whether Daylight Savings Time would be in effect.
188 ctPicosec :: Integer,
195 deriving (Eq,Ord,Read,Show)
197 -- The @TimeDiff@ type records the difference between two clock times in
198 -- a user-readable way.
208 tdPicosec :: Integer -- not standard
210 deriving (Eq,Ord,Read,Show)
212 noTimeDiff :: TimeDiff
213 noTimeDiff = TimeDiff 0 0 0 0 0 0 0
215 -- -----------------------------------------------------------------------------
216 -- getClockTime returns the current time in its internal representation.
218 getClockTime :: IO ClockTime
221 (sec,usec) <- getClockTimePrim
222 return (TOD (fromIntegral sec) ((fromIntegral usec) * 1000000))
224 #elif HAVE_GETTIMEOFDAY
226 let realToInteger = round . realToFrac :: Real a => a -> Integer
227 allocaBytes (#const sizeof(struct timeval)) $ \ p_timeval -> do
228 throwErrnoIfMinus1_ "getClockTime" $ gettimeofday p_timeval nullPtr
229 sec <- (#peek struct timeval,tv_sec) p_timeval :: IO CTime
230 usec <- (#peek struct timeval,tv_usec) p_timeval :: IO CTime
231 return (TOD (realToInteger sec) ((realToInteger usec) * 1000000))
235 let realToInteger = round . realToFrac :: Real a => a -> Integer
236 allocaBytes (#const sizeof(struct timeb)) $ \ p_timeb -> do
238 sec <- (#peek struct timeb,time) p_timeb :: IO CTime
239 msec <- (#peek struct timeb,millitm) p_timeb :: IO CUShort
240 return (TOD (realToInteger sec) (fromIntegral msec * 1000000000))
242 #else /* use POSIX time() */
244 secs <- time nullPtr -- can't fail, according to POSIX
245 return (TOD (fromIntegral secs) 0)
249 -- -----------------------------------------------------------------------------
250 -- addToClockTime d t adds a time difference d and a
251 -- clock time t to yield a new clock time. The difference d
252 -- may be either positive or negative. diffClockTimes t1 t2 returns
253 -- the difference between two clock times t1 and t2 as a TimeDiff.
255 addToClockTime :: TimeDiff -> ClockTime -> ClockTime
256 addToClockTime (TimeDiff year mon day hour min sec psec)
259 sec_diff = toInteger sec +
261 3600 * toInteger hour +
262 24 * 3600 * toInteger day
263 cal = toUTCTime (TOD (c_sec + sec_diff) (c_psec + psec))
265 new_mon = fromEnum (ctMonth cal) + r_mon
269 | new_mon < 0 = (toEnum (12 + new_mon), (-1))
270 | new_mon > 11 = (toEnum (new_mon `mod` 12), 1)
271 | otherwise = (toEnum new_mon, 0)
273 (r_yr, r_mon) = mon `quotRem` 12
275 year' = ctYear cal + year + r_yr + yr_diff
277 toClockTime cal{ctMonth=month', ctYear=year'}
279 diffClockTimes :: ClockTime -> ClockTime -> TimeDiff
280 -- diffClockTimes is meant to be the dual to `addToClockTime'.
281 -- If you want to have the TimeDiff properly splitted, use
282 -- `normalizeTimeDiff' on this function's result
284 -- CAVEAT: see comment of normalizeTimeDiff
285 diffClockTimes (TOD sa pa) (TOD sb pb) =
286 noTimeDiff{ tdSec = fromIntegral (sa - sb)
287 -- FIXME: can handle just 68 years...
288 , tdPicosec = pa - pb
292 normalizeTimeDiff :: TimeDiff -> TimeDiff
293 -- FIXME: handle psecs properly
294 -- FIXME: ?should be called by formatTimeDiff automagically?
296 -- when applied to something coming out of `diffClockTimes', you loose
297 -- the duality to `addToClockTime', since a year does not always have
300 -- apply this function as late as possible to prevent those "rounding"
302 normalizeTimeDiff td =
309 + 365 * tdYear td))))
311 (diffYears, rest1) = rest0 `quotRem` (365 * 24 * 3600)
312 (diffMonths, rest2) = rest1 `quotRem` (30 * 24 * 3600)
313 (diffDays, rest3) = rest2 `quotRem` (24 * 3600)
314 (diffHours, rest4) = rest3 `quotRem` 3600
315 (diffMins, diffSecs) = rest4 `quotRem` 60
317 td{ tdYear = diffYears
318 , tdMonth = diffMonths
326 -- -----------------------------------------------------------------------------
327 -- How do we deal with timezones on this architecture?
329 -- The POSIX way to do it is through the global variable tzname[].
330 -- But that's crap, so we do it The BSD Way if we can: namely use the
331 -- tm_zone and tm_gmtoff fields of struct tm, if they're available.
333 zone :: Ptr CTm -> IO (Ptr CChar)
334 gmtoff :: Ptr CTm -> IO CLong
336 zone x = (#peek struct tm,tm_zone) x
337 gmtoff x = (#peek struct tm,tm_gmtoff) x
339 #else /* ! HAVE_TM_ZONE */
340 # if HAVE_TZNAME || defined(_WIN32)
341 # if cygwin32_TARGET_OS
342 # define tzname _tzname
344 # ifndef mingw32_TARGET_OS
345 foreign import ccall unsafe "time.h &tzname" tzname :: Ptr (Ptr CChar)
347 foreign import ccall unsafe "__hscore_timezone" timezone :: Ptr CLong
348 foreign import ccall unsafe "__hscore_tzname" tzname :: Ptr (Ptr CChar)
351 dst <- (#peek struct tm,tm_isdst) x
352 if dst then peekElemOff tzname 1 else peekElemOff tzname 0
353 # else /* ! HAVE_TZNAME */
354 -- We're in trouble. If you should end up here, please report this as a bug.
355 # error "Don't know how to get at timezone name on your OS."
356 # endif /* ! HAVE_TZNAME */
358 -- Get the offset in secs from UTC, if (struct tm) doesn't supply it. */
359 # if HAVE_DECL_ALTZONE
360 foreign import ccall "&altzone" altzone :: Ptr CTime
361 foreign import ccall "&timezone" timezone :: Ptr CTime
363 dst <- (#peek struct tm,tm_isdst) x
364 tz <- if dst then peek altzone else peek timezone
365 return (-fromIntegral tz)
366 # else /* ! HAVE_DECL_ALTZONE */
368 #if !defined(mingw32_TARGET_OS)
369 foreign import ccall "time.h &timezone" timezone :: Ptr CLong
372 -- Assume that DST offset is 1 hour ...
374 dst <- (#peek struct tm,tm_isdst) x
376 -- According to the documentation for tzset(),
377 -- http://www.opengroup.org/onlinepubs/007908799/xsh/tzset.html
378 -- timezone offsets are > 0 west of the Prime Meridian.
380 -- This module assumes the interpretation of tm_gmtoff, i.e., offsets
381 -- are > 0 East of the Prime Meridian, so flip the sign.
382 return (- (if dst then (fromIntegral tz - 3600) else tz))
383 # endif /* ! HAVE_DECL_ALTZONE */
384 #endif /* ! HAVE_TM_ZONE */
385 #endif /* ! __HUGS__ */
387 -- -----------------------------------------------------------------------------
388 -- toCalendarTime t converts t to a local time, modified by
389 -- the current timezone and daylight savings time settings. toUTCTime
390 -- t converts t into UTC time. toClockTime l converts l into the
391 -- corresponding internal ClockTime. The wday, yday, tzname, and isdst fields
395 toCalendarTime :: ClockTime -> IO CalendarTime
397 toCalendarTime = toCalTime False
398 #elif HAVE_LOCALTIME_R
399 toCalendarTime = clockToCalendarTime_reentrant (throwAwayReturnPointer localtime_r) False
401 toCalendarTime = clockToCalendarTime_static localtime False
404 toUTCTime :: ClockTime -> CalendarTime
406 toUTCTime = unsafePerformIO . toCalTime True
408 toUTCTime = unsafePerformIO . clockToCalendarTime_reentrant (throwAwayReturnPointer gmtime_r) True
410 toUTCTime = unsafePerformIO . clockToCalendarTime_static gmtime True
414 toCalTime :: Bool -> ClockTime -> IO CalendarTime
415 toCalTime toUTC (TOD s psecs)
416 | (s > fromIntegral (maxBound :: Int)) ||
417 (s < fromIntegral (minBound :: Int))
418 = error ((if toUTC then "toUTCTime: " else "toCalendarTime: ") ++
419 "clock secs out of range")
421 (sec,min,hour,mday,mon,year,wday,yday,isdst,zone,off) <-
422 toCalTimePrim (if toUTC then 1 else 0) (fromIntegral s)
423 return (CalendarTime{ ctYear=1900+year
432 , ctTZName=(if toUTC then "UTC" else zone)
433 , ctTZ=(if toUTC then 0 else off)
434 , ctIsDST=not toUTC && (isdst/=0)
436 #else /* ! __HUGS__ */
437 throwAwayReturnPointer :: (Ptr CTime -> Ptr CTm -> IO (Ptr CTm))
438 -> (Ptr CTime -> Ptr CTm -> IO ( ))
439 throwAwayReturnPointer fun x y = fun x y >> return ()
441 clockToCalendarTime_static :: (Ptr CTime -> IO (Ptr CTm)) -> Bool -> ClockTime
443 clockToCalendarTime_static fun is_utc (TOD secs psec) = do
444 with (fromIntegral secs :: CTime) $ \ p_timer -> do
445 p_tm <- fun p_timer -- can't fail, according to POSIX
446 clockToCalendarTime_aux is_utc p_tm psec
448 clockToCalendarTime_reentrant :: (Ptr CTime -> Ptr CTm -> IO ()) -> Bool -> ClockTime
450 clockToCalendarTime_reentrant fun is_utc (TOD secs psec) = do
451 with (fromIntegral secs :: CTime) $ \ p_timer -> do
452 allocaBytes (#const sizeof(struct tm)) $ \ p_tm -> do
454 clockToCalendarTime_aux is_utc p_tm psec
456 clockToCalendarTime_aux :: Bool -> Ptr CTm -> Integer -> IO CalendarTime
457 clockToCalendarTime_aux is_utc p_tm psec = do
458 sec <- (#peek struct tm,tm_sec ) p_tm :: IO CInt
459 min <- (#peek struct tm,tm_min ) p_tm :: IO CInt
460 hour <- (#peek struct tm,tm_hour ) p_tm :: IO CInt
461 mday <- (#peek struct tm,tm_mday ) p_tm :: IO CInt
462 mon <- (#peek struct tm,tm_mon ) p_tm :: IO CInt
463 year <- (#peek struct tm,tm_year ) p_tm :: IO CInt
464 wday <- (#peek struct tm,tm_wday ) p_tm :: IO CInt
465 yday <- (#peek struct tm,tm_yday ) p_tm :: IO CInt
466 isdst <- (#peek struct tm,tm_isdst) p_tm :: IO CInt
470 tzname <- peekCString zone
472 let month | mon >= 0 && mon <= 11 = toEnum (fromIntegral mon)
473 | otherwise = error ("toCalendarTime: illegal month value: " ++ show mon)
476 (1900 + fromIntegral year)
483 (toEnum (fromIntegral wday))
485 (if is_utc then "UTC" else tzname)
486 (if is_utc then 0 else fromIntegral tz)
487 (if is_utc then False else isdst /= 0))
488 #endif /* ! __HUGS__ */
490 toClockTime :: CalendarTime -> ClockTime
492 toClockTime (CalendarTime yr mon mday hour min sec psec
493 _wday _yday _tzname tz _isdst) =
495 s <- toClockTimePrim (yr-1900) (fromEnum mon) mday hour min sec tz
496 return (TOD (fromIntegral s) psec)
497 #else /* ! __HUGS__ */
498 toClockTime (CalendarTime year mon mday hour min sec psec
499 _wday _yday _tzname tz isdst) =
501 -- `isDst' causes the date to be wrong by one hour...
502 -- FIXME: check, whether this works on other arch's than Linux, too...
504 -- so we set it to (-1) (means `unknown') and let `mktime' determine
506 let isDst = -1 :: CInt in -- if isdst then (1::Int) else 0
508 if psec < 0 || psec > 999999999999 then
509 error "Time.toClockTime: picoseconds out of range"
510 else if tz < -43200 || tz > 43200 then
511 error "Time.toClockTime: timezone offset out of range"
514 allocaBytes (#const sizeof(struct tm)) $ \ p_tm -> do
515 (#poke struct tm,tm_sec ) p_tm (fromIntegral sec :: CInt)
516 (#poke struct tm,tm_min ) p_tm (fromIntegral min :: CInt)
517 (#poke struct tm,tm_hour ) p_tm (fromIntegral hour :: CInt)
518 (#poke struct tm,tm_mday ) p_tm (fromIntegral mday :: CInt)
519 (#poke struct tm,tm_mon ) p_tm (fromIntegral (fromEnum mon) :: CInt)
520 (#poke struct tm,tm_year ) p_tm (fromIntegral year - 1900 :: CInt)
521 (#poke struct tm,tm_isdst) p_tm isDst
522 t <- throwIf (== -1) (\_ -> "Time.toClockTime: invalid input")
525 -- mktime expects its argument to be in the local timezone, but
526 -- toUTCTime makes UTC-encoded CalendarTime's ...
528 -- Since there is no any_tz_struct_tm-to-time_t conversion
529 -- function, we have to fake one... :-) If not in all, it works in
530 -- most cases (before, it was the other way round...)
532 -- Luckily, mktime tells us, what it *thinks* the timezone is, so,
533 -- to compensate, we add the timezone difference to mktime's
536 gmtoff <- gmtoff p_tm
537 let realToInteger = round . realToFrac :: Real a => a -> Integer
538 res = realToInteger t - fromIntegral tz + fromIntegral gmtoff
539 return (TOD res psec)
540 #endif /* ! __HUGS__ */
542 -- -----------------------------------------------------------------------------
543 -- Converting time values to strings.
545 calendarTimeToString :: CalendarTime -> String
546 calendarTimeToString = formatCalendarTime defaultTimeLocale "%c"
548 formatCalendarTime :: TimeLocale -> String -> CalendarTime -> String
549 formatCalendarTime l fmt (CalendarTime year mon day hour min sec _
550 wday yday tzname _ _) =
552 where doFmt ('%':'-':cs) = doFmt ('%':cs) -- padding not implemented
553 doFmt ('%':'_':cs) = doFmt ('%':cs) -- padding not implemented
554 doFmt ('%':c:cs) = decode c ++ doFmt cs
555 doFmt (c:cs) = c : doFmt cs
558 decode 'A' = fst (wDays l !! fromEnum wday) -- day of the week, full name
559 decode 'a' = snd (wDays l !! fromEnum wday) -- day of the week, abbrev.
560 decode 'B' = fst (months l !! fromEnum mon) -- month, full name
561 decode 'b' = snd (months l !! fromEnum mon) -- month, abbrev
562 decode 'h' = snd (months l !! fromEnum mon) -- ditto
563 decode 'C' = show2 (year `quot` 100) -- century
564 decode 'c' = doFmt (dateTimeFmt l) -- locale's data and time format.
565 decode 'D' = doFmt "%m/%d/%y"
566 decode 'd' = show2 day -- day of the month
567 decode 'e' = show2' day -- ditto, padded
568 decode 'H' = show2 hour -- hours, 24-hour clock, padded
569 decode 'I' = show2 (to12 hour) -- hours, 12-hour clock
570 decode 'j' = show3 yday -- day of the year
571 decode 'k' = show2' hour -- hours, 24-hour clock, no padding
572 decode 'l' = show2' (to12 hour) -- hours, 12-hour clock, no padding
573 decode 'M' = show2 min -- minutes
574 decode 'm' = show2 (fromEnum mon+1) -- numeric month
576 decode 'p' = (if hour < 12 then fst else snd) (amPm l) -- am or pm
577 decode 'R' = doFmt "%H:%M"
578 decode 'r' = doFmt (time12Fmt l)
579 decode 'T' = doFmt "%H:%M:%S"
581 decode 'S' = show2 sec -- seconds
582 decode 's' = show2 sec -- number of secs since Epoch. (ToDo.)
583 decode 'U' = show2 ((yday + 7 - fromEnum wday) `div` 7) -- week number, starting on Sunday.
584 decode 'u' = show (let n = fromEnum wday in -- numeric day of the week (1=Monday, 7=Sunday)
585 if n == 0 then 7 else n)
586 decode 'V' = -- week number (as per ISO-8601.)
587 let (week, days) = -- [yep, I've always wanted to be able to display that too.]
588 (yday + 7 - if fromEnum wday > 0 then
589 fromEnum wday - 1 else 6) `divMod` 7
590 in show2 (if days >= 4 then
592 else if week == 0 then 53 else week)
594 decode 'W' = -- week number, weeks starting on monday
595 show2 ((yday + 7 - if fromEnum wday > 0 then
596 fromEnum wday - 1 else 6) `div` 7)
597 decode 'w' = show (fromEnum wday) -- numeric day of the week, weeks starting on Sunday.
598 decode 'X' = doFmt (timeFmt l) -- locale's preferred way of printing time.
599 decode 'x' = doFmt (dateFmt l) -- locale's preferred way of printing dates.
600 decode 'Y' = show year -- year, including century.
601 decode 'y' = show2 (year `rem` 100) -- year, within century.
602 decode 'Z' = tzname -- timezone name
607 show2, show2', show3 :: Int -> String
609 | x' < 10 = '0': show x'
610 | otherwise = show x'
611 where x' = x `rem` 100
614 | x' < 10 = ' ': show x'
615 | otherwise = show x'
616 where x' = x `rem` 100
618 show3 x = show (x `quot` 100) ++ show2 (x `rem` 100)
619 where x' = x `rem` 1000
622 to12 h = let h' = h `mod` 12 in if h' == 0 then 12 else h'
624 -- Useful extensions for formatting TimeDiffs.
626 timeDiffToString :: TimeDiff -> String
627 timeDiffToString = formatTimeDiff defaultTimeLocale "%c"
629 formatTimeDiff :: TimeLocale -> String -> TimeDiff -> String
630 formatTimeDiff l fmt td@(TimeDiff year month day hour min sec _)
634 doFmt ('%':'-':cs) = doFmt ('%':cs) -- padding not implemented
635 doFmt ('%':'_':cs) = doFmt ('%':cs) -- padding not implemented
636 doFmt ('%':c:cs) = decode c ++ doFmt cs
637 doFmt (c:cs) = c : doFmt cs
641 'B' -> fst (months l !! fromEnum month)
642 'b' -> snd (months l !! fromEnum month)
643 'h' -> snd (months l !! fromEnum month)
644 'c' -> defaultTimeDiffFmt td
645 'C' -> show2 (year `quot` 100)
646 'D' -> doFmt "%m/%d/%y"
650 'I' -> show2 (to12 hour)
652 'l' -> show2' (to12 hour)
654 'm' -> show2 (fromEnum month + 1)
656 'p' -> (if hour < 12 then fst else snd) (amPm l)
658 'r' -> doFmt (time12Fmt l)
659 'T' -> doFmt "%H:%M:%S"
662 's' -> show2 sec -- Implementation-dependent, sez the lib doc..
663 'X' -> doFmt (timeFmt l)
664 'x' -> doFmt (dateFmt l)
666 'y' -> show2 (year `rem` 100)
670 defaultTimeDiffFmt (TimeDiff year month day hour min sec _) =
671 foldr (\ (v,s) rest ->
673 then show v ++ ' ':(addS v s)
674 ++ if null rest then "" else ", "
678 (zip [year, month, day, hour, min, sec] (intervals l))
680 addS v s = if abs v == 1 then fst s else snd s
683 -- -----------------------------------------------------------------------------
684 -- Foreign time interface (POSIX)
686 type CTm = () -- struct tm
689 foreign import ccall unsafe "time.h localtime_r"
690 localtime_r :: Ptr CTime -> Ptr CTm -> IO (Ptr CTm)
692 foreign import ccall unsafe "time.h localtime"
693 localtime :: Ptr CTime -> IO (Ptr CTm)
696 foreign import ccall unsafe "time.h gmtime_r"
697 gmtime_r :: Ptr CTime -> Ptr CTm -> IO (Ptr CTm)
699 foreign import ccall unsafe "time.h gmtime"
700 gmtime :: Ptr CTime -> IO (Ptr CTm)
702 foreign import ccall unsafe "time.h mktime"
703 mktime :: Ptr CTm -> IO CTime
704 foreign import ccall unsafe "time.h time"
705 time :: Ptr CTime -> IO CTime
707 #if HAVE_GETTIMEOFDAY
709 foreign import ccall unsafe "time.h gettimeofday"
710 gettimeofday :: Ptr CTimeVal -> Ptr () -> IO CInt
715 #ifndef mingw32_TARGET_OS
716 foreign import ccall unsafe "time.h ftime" ftime :: Ptr CTimeB -> IO CInt
718 foreign import ccall unsafe "time.h ftime" ftime :: Ptr CTimeB -> IO ()
721 #endif /* ! __HUGS__ */