1 files changed, 125 insertions, 0 deletions
diff --git a/src/dataType.ml b/src/dataType.ml
new file mode 100755
index 0000000..f30dd8c
--- /dev/null
+++ b/src/dataType.ml
@@ -0,0 +1,125 @@
+module type COMPARABLE = sig
+  type t
+  val eq: t -> t -> bool
+  val neq: t -> t -> bool
+  val lt: t -> t -> bool
+  val le: t -> t -> bool
+  val gt: t -> t -> bool
+  val ge: t -> t -> bool
+end
+
+module Comparable = struct
+
+  let eq = (=)
+  let neq = (<>)
+  let lt = (<)
+  let le = (<=)
+  let gt = (>)
+  let ge = (>=)
+
+end
+
+module Num = struct
+
+  let rnd () =
+    let value = Random.bits () in
+    Q.make (Z.of_int value) (Z.of_int (1 lsl 30))
+
+  include Q
+
+  let is_integer t = (Q.den t) == Z.one
+
+  let eq = Q.equal
+
+  let neq a b = not (Q.equal a b)
+
+  let mult = Q.mul
+
+  let floor t =
+    let num = Q.num t
+    and den = Q.den t in
+
+    if is_integer t then
+      Q.of_bigint num
+    else
+      Q.of_bigint @@ Z.fdiv num den
+
+  let round_down t =
+    let num = Q.num t
+    and den = Q.den t in
+
+    if is_integer t then
+      Q.of_bigint num
+    else
+      Q.of_bigint @@ Z.div num den
+
+  let round t =
+    if is_integer t then
+      t
+    else
+      let t' = match Q.sign t with
+        | 1  -> Q.add t @@ Q.of_ints 1 2
+        | -1 -> Q.add t @@ Q.of_ints (-1) 2
+        | _ ->  t in
+      let num = Q.num t'
+      and den = Q.den t' in
+      Q.of_bigint (Z.div num den)
+
+  let ge = Q.geq
+
+  let ge = Q.geq
+
+  let le = Q.leq
+
+  let pow t q_factor = begin
+
+    if is_integer q_factor then
+
+      let factor = Q.to_int q_factor
+      and num = Q.num t
+      and den = Q.den t in
+
+      Q.make (Z.pow num factor) (Z.pow den factor)
+
+    else
+
+      let factor = Q.to_float q_factor
+      and num = Z.to_float @@ Q.num t
+      and den = Z.to_float @@ Q.den t in
+
+      Q.div
+        (Q.of_float (num ** factor))
+        (Q.of_float (den ** factor))
+
+  end
+
+  let gcd t1 t2 =
+    Q.of_bigint @@ Z.gcd (Q.to_bigint t1) (Q.to_bigint t2)
+
+  let lcm t1 t2 =
+    Q.of_bigint @@ Z.lcm (Q.to_bigint t1) (Q.to_bigint t2)
+
+end
+
+module Bool = struct
+
+  type t = bool
+  include Comparable
+
+  let true_ = true
+  let false_ = false
+
+  let or_ = (||)
+  let and_ = (&&)
+  let not = Pervasives.not
+
+end
+
+module String = struct
+
+  type t = UTF8.t
+  include Comparable
+
+end
+
+module Date = Date.Make(Num)