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authorGravatar Adam Chlipala <adam@chlipala.net>2014-02-18 07:07:01 -0500
committerGravatar Adam Chlipala <adam@chlipala.net>2014-02-18 07:07:01 -0500
commita5299611e8a126a86a7f2121aa339d69a9fa5895 (patch)
treea7d9f1a32d92963d45c8ab93f0fec2396d973bd5 /lib/ur
parent6337358bed21a199da8663fe198457c799e11467 (diff)
parenta3c561f3daaffc39245c1aabee46f8cc22f375b8 (diff)
Merge with small clean-ups
Diffstat (limited to 'lib/ur')
-rw-r--r--lib/ur/basis.urs10
-rw-r--r--lib/ur/datetime.ur135
-rw-r--r--lib/ur/datetime.urs38
3 files changed, 183 insertions, 0 deletions
diff --git a/lib/ur/basis.urs b/lib/ur/basis.urs
index eefb5d2c..c94f2ba6 100644
--- a/lib/ur/basis.urs
+++ b/lib/ur/basis.urs
@@ -167,6 +167,16 @@ val diffInMilliseconds : time -> time -> int
val timef : string -> time -> string (* Uses strftime() format string *)
val readUtc : string -> option time
+(* Takes a year, month, day, hour, minute, second. *)
+val fromDatetime : int -> int -> int -> int -> int -> int -> time
+val datetimeYear : time -> int
+val datetimeMonth : time -> int
+val datetimeDay : time -> int
+val datetimeHour : time -> int
+val datetimeMinute: time -> int
+val datetimeSecond : time -> int
+val datetimeDayOfWeek : time -> int
+
(** * Encryption *)
diff --git a/lib/ur/datetime.ur b/lib/ur/datetime.ur
new file mode 100644
index 00000000..9aeab291
--- /dev/null
+++ b/lib/ur/datetime.ur
@@ -0,0 +1,135 @@
+datatype day_of_week = Sunday | Monday | Tuesday | Wednesday | Thursday |
+ Friday | Saturday
+
+val show_day_of_week = mkShow (fn dow => case dow of
+ Sunday => "Sunday"
+ | Monday => "Monday"
+ | Tuesday => "Tuesday"
+ | Wednesday => "Wednesday"
+ | Thursday => "Thursday"
+ | Friday => "Friday"
+ | Saturday => "Saturday")
+
+fun dayOfWeekToInt dow = case dow of
+ Sunday => 0
+ | Monday => 1
+ | Tuesday => 2
+ | Wednesday => 3
+ | Thursday => 4
+ | Friday => 5
+ | Saturday => 6
+
+fun intToDayOfWeek i = case i of
+ 0 => Sunday
+ | 1 => Monday
+ | 2 => Tuesday
+ | 3 => Wednesday
+ | 4 => Thursday
+ | 5 => Friday
+ | 6 => Saturday
+ | n => error <xml>Invalid day of week {[n]}</xml>
+
+val eq_day_of_week = mkEq (fn a b => dayOfWeekToInt a = dayOfWeekToInt b)
+
+
+datatype month = January | February | March | April | May | June | July |
+ August | September | October | November | December
+
+val show_month = mkShow (fn m => case m of
+ January => "January"
+ | February => "February"
+ | March => "March"
+ | April => "April"
+ | May => "May"
+ | June => "June"
+ | July => "July"
+ | August => "August"
+ | September => "September"
+ | October => "October"
+ | November => "November"
+ | December => "December")
+
+type t = {
+ Year : int,
+ Month : month,
+ Day : int,
+ Hour : int,
+ Minute : int,
+ Second : int
+}
+
+fun monthToInt m = case m of
+ January => 0
+ | February => 1
+ | March => 2
+ | April => 3
+ | May => 4
+ | June => 5
+ | July => 6
+ | August => 7
+ | September => 8
+ | October => 9
+ | November => 10
+ | December => 11
+
+fun intToMonth i = case i of
+ 0 => January
+ | 1 => February
+ | 2 => March
+ | 3 => April
+ | 4 => May
+ | 5 => June
+ | 6 => July
+ | 7 => August
+ | 8 => September
+ | 9 => October
+ | 10 => November
+ | 11 => December
+ | n => error <xml>Invalid month number {[n]}</xml>
+
+val eq_month = mkEq (fn a b => monthToInt a = monthToInt b)
+
+
+fun toTime dt : time = fromDatetime dt.Year (monthToInt dt.Month) dt.Day
+ dt.Hour dt.Minute dt.Second
+
+fun fromTime t : t = {
+ Year = datetimeYear t,
+ Month = intToMonth (datetimeMonth t),
+ Day = datetimeDay t,
+ Hour = datetimeHour t,
+ Minute = datetimeMinute t,
+ Second = datetimeSecond t
+}
+
+val ord_datetime = mkOrd { Lt = fn a b => toTime a < toTime b,
+ Le = fn a b => toTime a <= toTime b }
+
+fun format fmt dt : string = timef fmt (toTime dt)
+
+fun dayOfWeek dt : day_of_week = intToDayOfWeek (datetimeDayOfWeek (toTime dt))
+
+val now : transaction t =
+ n <- now;
+ return (fromTime n)
+
+(* Normalize a datetime. This will convert, e.g., January 32nd into February
+ 1st. *)
+
+fun normalize dt = fromTime (toTime dt)
+fun addToField [nm :: Name] [rest ::: {Type}] [[nm] ~ rest]
+ (delta : int) (r : $([nm = int] ++ rest))
+ : $([nm = int] ++ rest) =
+ (r -- nm) ++ {nm = r.nm + delta}
+
+
+(* Functions for adding to a datetime. There is no addMonths or addYears since
+ it's not clear what should be done; what's 1 month after January 31, or 1
+ year after February 29th?
+
+ These can't all be defined in terms of addSeconds because of leap seconds. *)
+
+fun addSeconds n dt = normalize (addToField [#Second] n dt)
+fun addMinutes n dt = normalize (addToField [#Minute] n dt)
+fun addHours n dt = normalize (addToField [#Hour] n dt)
+fun addDays n dt = normalize (addToField [#Day] n dt)
diff --git a/lib/ur/datetime.urs b/lib/ur/datetime.urs
new file mode 100644
index 00000000..972f86bf
--- /dev/null
+++ b/lib/ur/datetime.urs
@@ -0,0 +1,38 @@
+datatype day_of_week = Sunday | Monday | Tuesday | Wednesday | Thursday |
+ Friday | Saturday
+
+datatype month = January | February | March | April | May | June | July |
+ August | September | October | November | December
+
+
+type t = {
+ Year : int,
+ Month : month,
+ Day : int,
+ Hour : int,
+ Minute : int,
+ Second : int
+}
+
+val ord_datetime : ord t
+
+val show_day_of_week : show day_of_week
+val show_month : show month
+val eq_day_of_week : eq day_of_week
+val eq_month : eq month
+val dayOfWeekToInt : day_of_week -> int
+val intToDayOfWeek : int -> day_of_week
+val monthToInt : month -> int
+val intToMonth : int -> month
+
+val toTime : t -> time
+val fromTime : time -> t
+val format : string -> t -> string
+val dayOfWeek : t -> day_of_week
+val now : transaction t
+val normalize : t -> t
+
+val addSeconds : int -> t -> t
+val addMinutes : int -> t -> t
+val addHours : int -> t -> t
+val addDays : int -> t -> t