regress/sys/uvm/pdsim/opt.hs

   1 {-
   2 /*      $NetBSD: opt.hs,v 1.1 2006/09/30 08:50:32 yamt Exp $    */
   3
   4 /*-
   5  * Copyright (c)2006 YAMAMOTO Takashi,
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29 -}
  30
  31 import System.Environment
  32 import System.IO
  33 import List
  34 import Maybe
  35 import qualified Data.Set as Set
  36
  37 ff s [] = head $ Set.elems s
  38 ff s (y:ys) =
  39         if Set.size s == 1 then head $ Set.elems s else
  40         if Set.member y s then
  41                 ff (Set.delete y s) ys
  42         else
  43                 ff s ys
  44
  45 do_opt1 npg n q [] = (reverse n, q)
  46 do_opt1 npg n q rs@(r:rs2) =
  47         if Set.member r q then
  48                 do_opt1 npg n q rs2
  49         else if Set.size q < npg then
  50                 do_opt1 npg (r:n) (Set.insert r q) rs2
  51         else
  52                 let
  53                         c = ff q rs2
  54                         nq = Set.delete c q
  55                 in
  56                 do_opt1 npg (r:n) (Set.insert r nq) rs2
  57
  58 do_opt npg rs = fst $ do_opt1 npg [] Set.empty rs
  59 do_opt_dbg npg rs = do_opt1 npg [] Set.empty rs
  60
  61 main = do
  62         xs <- getContents
  63         args <- getArgs
  64         let
  65                 ls = lines xs
  66                 npgs::Int
  67                 npgs = read $ args !! 0
  68                 pgs::[Int]
  69                 pgs = map read ls
  70         mapM_ print $ do_opt npgs pgs