(* TEST
 readonly_files = "main.c";
 arguments = "-DSORT -DFUN=quicksort main.c";
 asmgen;
*)

(**************************************************************************)
(*                                                                        *)
(*                                OCaml                                   *)
(*                                                                        *)
(*             Xavier Leroy, projet Cristal, INRIA Rocquencourt           *)
(*                                                                        *)
(*   Copyright 1996 Institut National de Recherche en Informatique et     *)
(*     en Automatique.                                                    *)
(*                                                                        *)
(*   All rights reserved.  This file is distributed under the terms of    *)
(*   the GNU Lesser General Public License version 2.1, with the          *)
(*   special exception on linking described in the file LICENSE.          *)
(*                                                                        *)
(**************************************************************************)

(function "cmp" (i: int j: int)
  (- i j))

(function "quick" (lo: int hi: int a: val cmp: val)
  (if (< lo hi)
      (letmut (i int lo
               j int hi
               pivot int (intaref a hi))
        (while (< i j)
          (catch
            (while 1
              (if (>= i hi) (exit n25) [])
              (if (> (app cmp (intaref a i) pivot int) 0) (exit n25) [])
              (assign i (+ i 1)))
            with (n25) [])
          (catch
            (while 1
              (if (<= j lo) (exit n35) [])
              (if (< (app cmp (intaref a j) pivot int) 0) (exit n35) [])
              (assign j (- j 1)))
           with (n35) [])
          (if (< i j)
              (let temp (intaref a i)
                   (intaset a i (intaref a j))
                   (intaset a j temp))
            []))
        (let temp (intaref a i)
             (intaset a i (intaref a hi))
             (intaset a hi temp))
        (app "quick" lo (- i 1) a cmp unit)
        (app "quick" (+ i 1) hi a cmp unit))
    []))

(function "quicksort" (lo: int hi: int a: val)
  (app "quick" lo hi a "cmp" unit))