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 let realToInteger = round . realToFrac :: Real a => a -> Integer
246 return (TOD (realToInteger secs) 0)
250 -- -----------------------------------------------------------------------------
251 -- addToClockTime d t adds a time difference d and a
252 -- clock time t to yield a new clock time. The difference d
253 -- may be either positive or negative. diffClockTimes t1 t2 returns
254 -- the difference between two clock times t1 and t2 as a TimeDiff.
256 addToClockTime :: TimeDiff -> ClockTime -> ClockTime
257 addToClockTime (TimeDiff year mon day hour min sec psec)
260 sec_diff = toInteger sec +
262 3600 * toInteger hour +
263 24 * 3600 * toInteger day
264 cal = toUTCTime (TOD (c_sec + sec_diff) (c_psec + psec))
266 new_mon = fromEnum (ctMonth cal) + r_mon
270 | new_mon < 0 = (toEnum (12 + new_mon), (-1))
271 | new_mon > 11 = (toEnum (new_mon `mod` 12), 1)
272 | otherwise = (toEnum new_mon, 0)
274 (r_yr, r_mon) = mon `quotRem` 12
276 year' = ctYear cal + year + r_yr + yr_diff
278 toClockTime cal{ctMonth=month', ctYear=year'}
280 diffClockTimes :: ClockTime -> ClockTime -> TimeDiff
281 -- diffClockTimes is meant to be the dual to `addToClockTime'.
282 -- If you want to have the TimeDiff properly splitted, use
283 -- `normalizeTimeDiff' on this function's result
285 -- CAVEAT: see comment of normalizeTimeDiff
286 diffClockTimes (TOD sa pa) (TOD sb pb) =
287 noTimeDiff{ tdSec = fromIntegral (sa - sb)
288 -- FIXME: can handle just 68 years...
289 , tdPicosec = pa - pb
293 normalizeTimeDiff :: TimeDiff -> TimeDiff
294 -- FIXME: handle psecs properly
295 -- FIXME: ?should be called by formatTimeDiff automagically?
297 -- when applied to something coming out of `diffClockTimes', you loose
298 -- the duality to `addToClockTime', since a year does not always have
301 -- apply this function as late as possible to prevent those "rounding"
303 normalizeTimeDiff td =
310 + 365 * tdYear td))))
312 (diffYears, rest1) = rest0 `quotRem` (365 * 24 * 3600)
313 (diffMonths, rest2) = rest1 `quotRem` (30 * 24 * 3600)
314 (diffDays, rest3) = rest2 `quotRem` (24 * 3600)
315 (diffHours, rest4) = rest3 `quotRem` 3600
316 (diffMins, diffSecs) = rest4 `quotRem` 60
318 td{ tdYear = diffYears
319 , tdMonth = diffMonths
327 -- -----------------------------------------------------------------------------
328 -- How do we deal with timezones on this architecture?
330 -- The POSIX way to do it is through the global variable tzname[].
331 -- But that's crap, so we do it The BSD Way if we can: namely use the
332 -- tm_zone and tm_gmtoff fields of struct tm, if they're available.
334 zone :: Ptr CTm -> IO (Ptr CChar)
335 gmtoff :: Ptr CTm -> IO CLong
337 zone x = (#peek struct tm,tm_zone) x
338 gmtoff x = (#peek struct tm,tm_gmtoff) x
340 #else /* ! HAVE_TM_ZONE */
341 # if HAVE_TZNAME || defined(_WIN32)
342 # if cygwin32_TARGET_OS
343 # define tzname _tzname
345 # ifndef mingw32_TARGET_OS
346 foreign import ccall unsafe "time.h &tzname" tzname :: Ptr (Ptr CChar)
348 foreign import ccall unsafe "__hscore_timezone" timezone :: Ptr CLong
349 foreign import ccall unsafe "__hscore_tzname" tzname :: Ptr (Ptr CChar)
352 dst <- (#peek struct tm,tm_isdst) x
353 if dst then peekElemOff tzname 1 else peekElemOff tzname 0
354 # else /* ! HAVE_TZNAME */
355 -- We're in trouble. If you should end up here, please report this as a bug.
356 # error "Don't know how to get at timezone name on your OS."
357 # endif /* ! HAVE_TZNAME */
359 -- Get the offset in secs from UTC, if (struct tm) doesn't supply it. */
360 # if HAVE_DECL_ALTZONE
361 foreign import ccall "&altzone" altzone :: Ptr CTime
362 foreign import ccall "&timezone" timezone :: Ptr CTime
364 dst <- (#peek struct tm,tm_isdst) x
365 tz <- if dst then peek altzone else peek timezone
366 return (-fromIntegral tz)
367 # else /* ! HAVE_DECL_ALTZONE */
369 #if !defined(mingw32_TARGET_OS)
370 foreign import ccall "time.h &timezone" timezone :: Ptr CLong
373 -- Assume that DST offset is 1 hour ...
375 dst <- (#peek struct tm,tm_isdst) x
377 -- According to the documentation for tzset(),
378 -- http://www.opengroup.org/onlinepubs/007908799/xsh/tzset.html
379 -- timezone offsets are > 0 west of the Prime Meridian.
381 -- This module assumes the interpretation of tm_gmtoff, i.e., offsets
382 -- are > 0 East of the Prime Meridian, so flip the sign.
383 return (- (if dst then (fromIntegral tz - 3600) else tz))
384 # endif /* ! HAVE_DECL_ALTZONE */
385 #endif /* ! HAVE_TM_ZONE */
386 #endif /* ! __HUGS__ */
388 -- -----------------------------------------------------------------------------
389 -- toCalendarTime t converts t to a local time, modified by
390 -- the current timezone and daylight savings time settings. toUTCTime
391 -- t converts t into UTC time. toClockTime l converts l into the
392 -- corresponding internal ClockTime. The wday, yday, tzname, and isdst fields
396 toCalendarTime :: ClockTime -> IO CalendarTime
398 toCalendarTime = toCalTime False
399 #elif HAVE_LOCALTIME_R
400 toCalendarTime = clockToCalendarTime_reentrant (throwAwayReturnPointer localtime_r) False
402 toCalendarTime = clockToCalendarTime_static localtime False
405 toUTCTime :: ClockTime -> CalendarTime
407 toUTCTime = unsafePerformIO . toCalTime True
409 toUTCTime = unsafePerformIO . clockToCalendarTime_reentrant (throwAwayReturnPointer gmtime_r) True
411 toUTCTime = unsafePerformIO . clockToCalendarTime_static gmtime True
415 toCalTime :: Bool -> ClockTime -> IO CalendarTime
416 toCalTime toUTC (TOD s psecs)
417 | (s > fromIntegral (maxBound :: Int)) ||
418 (s < fromIntegral (minBound :: Int))
419 = error ((if toUTC then "toUTCTime: " else "toCalendarTime: ") ++
420 "clock secs out of range")
422 (sec,min,hour,mday,mon,year,wday,yday,isdst,zone,off) <-
423 toCalTimePrim (if toUTC then 1 else 0) (fromIntegral s)
424 return (CalendarTime{ ctYear=1900+year
433 , ctTZName=(if toUTC then "UTC" else zone)
434 , ctTZ=(if toUTC then 0 else off)
435 , ctIsDST=not toUTC && (isdst/=0)
437 #else /* ! __HUGS__ */
438 throwAwayReturnPointer :: (Ptr CTime -> Ptr CTm -> IO (Ptr CTm))
439 -> (Ptr CTime -> Ptr CTm -> IO ( ))
440 throwAwayReturnPointer fun x y = fun x y >> return ()
442 clockToCalendarTime_static :: (Ptr CTime -> IO (Ptr CTm)) -> Bool -> ClockTime
444 clockToCalendarTime_static fun is_utc (TOD secs psec) = do
445 with (fromIntegral secs :: CTime) $ \ p_timer -> do
446 p_tm <- fun p_timer -- can't fail, according to POSIX
447 clockToCalendarTime_aux is_utc p_tm psec
449 clockToCalendarTime_reentrant :: (Ptr CTime -> Ptr CTm -> IO ()) -> Bool -> ClockTime
451 clockToCalendarTime_reentrant fun is_utc (TOD secs psec) = do
452 with (fromIntegral secs :: CTime) $ \ p_timer -> do
453 allocaBytes (#const sizeof(struct tm)) $ \ p_tm -> do
455 clockToCalendarTime_aux is_utc p_tm psec
457 clockToCalendarTime_aux :: Bool -> Ptr CTm -> Integer -> IO CalendarTime
458 clockToCalendarTime_aux is_utc p_tm psec = do
459 sec <- (#peek struct tm,tm_sec ) p_tm :: IO CInt
460 min <- (#peek struct tm,tm_min ) p_tm :: IO CInt
461 hour <- (#peek struct tm,tm_hour ) p_tm :: IO CInt
462 mday <- (#peek struct tm,tm_mday ) p_tm :: IO CInt
463 mon <- (#peek struct tm,tm_mon ) p_tm :: IO CInt
464 year <- (#peek struct tm,tm_year ) p_tm :: IO CInt
465 wday <- (#peek struct tm,tm_wday ) p_tm :: IO CInt
466 yday <- (#peek struct tm,tm_yday ) p_tm :: IO CInt
467 isdst <- (#peek struct tm,tm_isdst) p_tm :: IO CInt
471 tzname <- peekCString zone
473 let month | mon >= 0 && mon <= 11 = toEnum (fromIntegral mon)
474 | otherwise = error ("toCalendarTime: illegal month value: " ++ show mon)
477 (1900 + fromIntegral year)
484 (toEnum (fromIntegral wday))
486 (if is_utc then "UTC" else tzname)
487 (if is_utc then 0 else fromIntegral tz)
488 (if is_utc then False else isdst /= 0))
489 #endif /* ! __HUGS__ */
491 toClockTime :: CalendarTime -> ClockTime
493 toClockTime (CalendarTime yr mon mday hour min sec psec
494 _wday _yday _tzname tz _isdst) =
496 s <- toClockTimePrim (yr-1900) (fromEnum mon) mday hour min sec tz
497 return (TOD (fromIntegral s) psec)
498 #else /* ! __HUGS__ */
499 toClockTime (CalendarTime year mon mday hour min sec psec
500 _wday _yday _tzname tz isdst) =
502 -- `isDst' causes the date to be wrong by one hour...
503 -- FIXME: check, whether this works on other arch's than Linux, too...
505 -- so we set it to (-1) (means `unknown') and let `mktime' determine
507 let isDst = -1 :: CInt in -- if isdst then (1::Int) else 0
509 if psec < 0 || psec > 999999999999 then
510 error "Time.toClockTime: picoseconds out of range"
511 else if tz < -43200 || tz > 43200 then
512 error "Time.toClockTime: timezone offset out of range"
515 allocaBytes (#const sizeof(struct tm)) $ \ p_tm -> do
516 (#poke struct tm,tm_sec ) p_tm (fromIntegral sec :: CInt)
517 (#poke struct tm,tm_min ) p_tm (fromIntegral min :: CInt)
518 (#poke struct tm,tm_hour ) p_tm (fromIntegral hour :: CInt)
519 (#poke struct tm,tm_mday ) p_tm (fromIntegral mday :: CInt)
520 (#poke struct tm,tm_mon ) p_tm (fromIntegral (fromEnum mon) :: CInt)
521 (#poke struct tm,tm_year ) p_tm (fromIntegral year - 1900 :: CInt)
522 (#poke struct tm,tm_isdst) p_tm isDst
523 t <- throwIf (== -1) (\_ -> "Time.toClockTime: invalid input")
526 -- mktime expects its argument to be in the local timezone, but
527 -- toUTCTime makes UTC-encoded CalendarTime's ...
529 -- Since there is no any_tz_struct_tm-to-time_t conversion
530 -- function, we have to fake one... :-) If not in all, it works in
531 -- most cases (before, it was the other way round...)
533 -- Luckily, mktime tells us, what it *thinks* the timezone is, so,
534 -- to compensate, we add the timezone difference to mktime's
537 gmtoff <- gmtoff p_tm
538 let realToInteger = round . realToFrac :: Real a => a -> Integer
539 res = realToInteger t - fromIntegral tz + fromIntegral gmtoff
540 return (TOD res psec)
541 #endif /* ! __HUGS__ */
543 -- -----------------------------------------------------------------------------
544 -- Converting time values to strings.
546 calendarTimeToString :: CalendarTime -> String
547 calendarTimeToString = formatCalendarTime defaultTimeLocale "%c"
549 formatCalendarTime :: TimeLocale -> String -> CalendarTime -> String
550 formatCalendarTime l fmt (CalendarTime year mon day hour min sec _
551 wday yday tzname _ _) =
553 where doFmt ('%':'-':cs) = doFmt ('%':cs) -- padding not implemented
554 doFmt ('%':'_':cs) = doFmt ('%':cs) -- padding not implemented
555 doFmt ('%':c:cs) = decode c ++ doFmt cs
556 doFmt (c:cs) = c : doFmt cs
559 decode 'A' = fst (wDays l !! fromEnum wday) -- day of the week, full name
560 decode 'a' = snd (wDays l !! fromEnum wday) -- day of the week, abbrev.
561 decode 'B' = fst (months l !! fromEnum mon) -- month, full name
562 decode 'b' = snd (months l !! fromEnum mon) -- month, abbrev
563 decode 'h' = snd (months l !! fromEnum mon) -- ditto
564 decode 'C' = show2 (year `quot` 100) -- century
565 decode 'c' = doFmt (dateTimeFmt l) -- locale's data and time format.
566 decode 'D' = doFmt "%m/%d/%y"
567 decode 'd' = show2 day -- day of the month
568 decode 'e' = show2' day -- ditto, padded
569 decode 'H' = show2 hour -- hours, 24-hour clock, padded
570 decode 'I' = show2 (to12 hour) -- hours, 12-hour clock
571 decode 'j' = show3 yday -- day of the year
572 decode 'k' = show2' hour -- hours, 24-hour clock, no padding
573 decode 'l' = show2' (to12 hour) -- hours, 12-hour clock, no padding
574 decode 'M' = show2 min -- minutes
575 decode 'm' = show2 (fromEnum mon+1) -- numeric month
577 decode 'p' = (if hour < 12 then fst else snd) (amPm l) -- am or pm
578 decode 'R' = doFmt "%H:%M"
579 decode 'r' = doFmt (time12Fmt l)
580 decode 'T' = doFmt "%H:%M:%S"
582 decode 'S' = show2 sec -- seconds
583 decode 's' = show2 sec -- number of secs since Epoch. (ToDo.)
584 decode 'U' = show2 ((yday + 7 - fromEnum wday) `div` 7) -- week number, starting on Sunday.
585 decode 'u' = show (let n = fromEnum wday in -- numeric day of the week (1=Monday, 7=Sunday)
586 if n == 0 then 7 else n)
587 decode 'V' = -- week number (as per ISO-8601.)
588 let (week, days) = -- [yep, I've always wanted to be able to display that too.]
589 (yday + 7 - if fromEnum wday > 0 then
590 fromEnum wday - 1 else 6) `divMod` 7
591 in show2 (if days >= 4 then
593 else if week == 0 then 53 else week)
595 decode 'W' = -- week number, weeks starting on monday
596 show2 ((yday + 7 - if fromEnum wday > 0 then
597 fromEnum wday - 1 else 6) `div` 7)
598 decode 'w' = show (fromEnum wday) -- numeric day of the week, weeks starting on Sunday.
599 decode 'X' = doFmt (timeFmt l) -- locale's preferred way of printing time.
600 decode 'x' = doFmt (dateFmt l) -- locale's preferred way of printing dates.
601 decode 'Y' = show year -- year, including century.
602 decode 'y' = show2 (year `rem` 100) -- year, within century.
603 decode 'Z' = tzname -- timezone name
608 show2, show2', show3 :: Int -> String
610 | x' < 10 = '0': show x'
611 | otherwise = show x'
612 where x' = x `rem` 100
615 | x' < 10 = ' ': show x'
616 | otherwise = show x'
617 where x' = x `rem` 100
619 show3 x = show (x `quot` 100) ++ show2 (x `rem` 100)
620 where x' = x `rem` 1000
623 to12 h = let h' = h `mod` 12 in if h' == 0 then 12 else h'
625 -- Useful extensions for formatting TimeDiffs.
627 timeDiffToString :: TimeDiff -> String
628 timeDiffToString = formatTimeDiff defaultTimeLocale "%c"
630 formatTimeDiff :: TimeLocale -> String -> TimeDiff -> String
631 formatTimeDiff l fmt td@(TimeDiff year month day hour min sec _)
635 doFmt ('%':'-':cs) = doFmt ('%':cs) -- padding not implemented
636 doFmt ('%':'_':cs) = doFmt ('%':cs) -- padding not implemented
637 doFmt ('%':c:cs) = decode c ++ doFmt cs
638 doFmt (c:cs) = c : doFmt cs
642 'B' -> fst (months l !! fromEnum month)
643 'b' -> snd (months l !! fromEnum month)
644 'h' -> snd (months l !! fromEnum month)
645 'c' -> defaultTimeDiffFmt td
646 'C' -> show2 (year `quot` 100)
647 'D' -> doFmt "%m/%d/%y"
651 'I' -> show2 (to12 hour)
653 'l' -> show2' (to12 hour)
655 'm' -> show2 (fromEnum month + 1)
657 'p' -> (if hour < 12 then fst else snd) (amPm l)
659 'r' -> doFmt (time12Fmt l)
660 'T' -> doFmt "%H:%M:%S"
663 's' -> show2 sec -- Implementation-dependent, sez the lib doc..
664 'X' -> doFmt (timeFmt l)
665 'x' -> doFmt (dateFmt l)
667 'y' -> show2 (year `rem` 100)
671 defaultTimeDiffFmt (TimeDiff year month day hour min sec _) =
672 foldr (\ (v,s) rest ->
674 then show v ++ ' ':(addS v s)
675 ++ if null rest then "" else ", "
679 (zip [year, month, day, hour, min, sec] (intervals l))
681 addS v s = if abs v == 1 then fst s else snd s
684 -- -----------------------------------------------------------------------------
685 -- Foreign time interface (POSIX)
687 type CTm = () -- struct tm
690 foreign import ccall unsafe "time.h localtime_r"
691 localtime_r :: Ptr CTime -> Ptr CTm -> IO (Ptr CTm)
693 foreign import ccall unsafe "time.h localtime"
694 localtime :: Ptr CTime -> IO (Ptr CTm)
697 foreign import ccall unsafe "time.h gmtime_r"
698 gmtime_r :: Ptr CTime -> Ptr CTm -> IO (Ptr CTm)
700 foreign import ccall unsafe "time.h gmtime"
701 gmtime :: Ptr CTime -> IO (Ptr CTm)
703 foreign import ccall unsafe "time.h mktime"
704 mktime :: Ptr CTm -> IO CTime
705 foreign import ccall unsafe "time.h time"
706 time :: Ptr CTime -> IO CTime
708 #if HAVE_GETTIMEOFDAY
710 foreign import ccall unsafe "time.h gettimeofday"
711 gettimeofday :: Ptr CTimeVal -> Ptr () -> IO CInt
716 #ifndef mingw32_TARGET_OS
717 foreign import ccall unsafe "time.h ftime" ftime :: Ptr CTimeB -> IO CInt
719 foreign import ccall unsafe "time.h ftime" ftime :: Ptr CTimeB -> IO ()
722 #endif /* ! __HUGS__ */