Rename interpretor to interpreter.

[Faustine.git] / interpreter / aux.ml

diff --git a/interpreter/aux.ml b/interpreter/aux.ml
new file mode 100644 (file)
index 0000000..7c21a61
--- /dev/null
+++ b/interpreter/aux.ml
@@ -0,0 +1,36 @@
+(**
+       Module: Aux
+       Description: all auxiliary functions
+       @author WANG Haisheng   
+       Created: 12/08/2013     Modified: 13/08/2013
+*)
+
+let array_map2 = fun f -> fun a -> fun b ->
+  let n1 = Array.length a in
+  let n2 = Array.length b in
+  if n1 = n2 then Array.init n1 (fun i -> f a.(i) b.(i))
+  else raise (Invalid_argument "Array.map2 size not matched.");;
+
+let array_map3 = fun f -> fun a -> fun b -> fun c ->
+  let n1 = Array.length a in
+  let n2 = Array.length b in
+  let n3 = Array.length c in
+  if n1 = n2 && n1 = n3 then Array.init n1 (fun i -> f a.(i) b.(i) c.(i))
+  else raise (Invalid_argument "Array.map3 size not matched.");;
+
+let decorate = fun s -> "    Faustine -> " ^ s;;
+
+let xor : bool -> bool -> bool =
+  fun a -> fun b -> (a || b) && (not (a && b));;
+
+let rint : float -> float = 
+  fun f -> 
+    if (f -. (floor f)) >= 0.5 then ceil f
+    else floor f;;
+
+let remainder_float : float -> float -> float = 
+  fun f1 -> fun f2 ->
+    let r = mod_float f1 f2 in
+    if (abs_float r) > ((abs_float f2) /. 2.) then
+      (if r *. f2 > 0. then (r -. f2) else (r +. f2))
+    else r;;