Carp/core/Int.carp

(system-include "carp_int.h")

(defmodule Int
  (register MAX Int "INT_MAX")
  (register MIN Int "INT_MIN")
  (register + (λ [Int Int] Int))
  (register - (λ [Int Int] Int))
  (register * (λ [Int Int] Int))
  (register / (λ [Int Int] Int))
  (register < (λ [Int Int] Bool))
  (register > (λ [Int Int] Bool))
  (register = (λ [Int Int] Bool))
  (register /= (λ [Int Int] Bool))
  (register neg (λ [Int] Int))
  (register mod (λ [Int Int] Int))
  (register bit-shift-left (λ [Int Int] Int))
  (register bit-shift-right (λ [Int Int] Int))
  (register bit-and (λ [Int Int] Int))
  (register bit-or (λ [Int Int] Int))
  (register bit-xor (λ [Int Int] Int))
  (register bit-not (λ [Int] Int))
  (register inc (λ [Int] Int))
  (register dec (λ [Int] Int))
  (register copy (λ [&Int] Int))

  (doc abs "The absolute value (removes the negative sign) of an Int.")
  (register abs (λ [Int] Int))

  (defn even? [a] (= (mod a 2) 0))
  (defn odd? [a] (not (even? a)))

  (defn zero []
    0)

  (defn add-ref [x y]
    (Int.+ @x @y))

  ;; Move to generic math module?
  (defn clamp [min, max, val]
    (if (> val max)
      max
      (if (< val min)
        min
        val)))

  (doc pow "Raise x to the power of y.")
  (defn pow [x y]
    (let-do [r 1]
      (while (/= y 0)
        (do
          (when (/= (bit-and y 1) 0)
            (set! r (* r x)))
          (set! y (/ y 2))
          (set! x (* x x))))
      r))
)

(defmodule IntRef
  (defn = [a b]
    (Int.= @a @b))

  (defn /= [a b]
    (Int./= @a @b))

  (defn < [a b]
    (Int.< @a @b))

  (defn > [a b]
    (Int.> @a @b))
)