From 055c0d0d5a5bb0dc75904fe53df7f2e4f5732a8f Mon Sep 17 00:00:00 2001
From: aarne <aarne@cs.chalmers.se>
Date: Wed, 21 May 2008 09:26:44 +0000
Subject: GF/src is now for 2.9, and the new sources are in src-3.0 - keep it
 this way until the release of GF 3

---
 src-3.0/GF/System/Arch.hs | 90 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)
 create mode 100644 src-3.0/GF/System/Arch.hs

(limited to 'src-3.0/GF/System/Arch.hs')

diff --git a/src-3.0/GF/System/Arch.hs b/src-3.0/GF/System/Arch.hs
new file mode 100644
index 000000000..c0dac3644
--- /dev/null
+++ b/src-3.0/GF/System/Arch.hs
@@ -0,0 +1,90 @@
+----------------------------------------------------------------------
+-- |
+-- Module      : Arch
+-- Maintainer  : AR
+-- Stability   : (stable)
+-- Portability : (portable)
+--
+-- > CVS $Date: 2005/05/10 14:55:01 $ 
+-- > CVS $Author: bringert $
+-- > CVS $Revision: 1.8 $
+--
+-- architecture\/compiler dependent definitions for unix\/hbc
+-----------------------------------------------------------------------------
+
+module GF.System.Arch (
+ myStdGen, prCPU, selectLater, modifiedFiles, ModTime, getModTime,getNowTime,
+ welcomeArch, fetchCommand, laterModTime) where
+
+import System.Time
+import System.Random
+import System.CPUTime
+import Control.Monad (filterM)
+import System.Directory
+
+import GF.System.Readline (fetchCommand)
+
+---- import qualified UnicodeF as U --(fudlogueWrite)
+
+-- architecture/compiler dependent definitions for unix/hbc
+
+myStdGen :: Int -> IO StdGen ---
+--- myStdGen _ = newStdGen --- gives always the same result
+myStdGen int0 = do
+  t0  <- getClockTime 
+  cal <- toCalendarTime t0 
+  let int = int0 + ctSec cal + fromInteger (div (ctPicosec cal) 10000000)
+  return $ mkStdGen int
+
+prCPU :: Integer -> IO Integer
+prCPU cpu = do 
+  cpu' <- getCPUTime
+  putStrLn (show ((cpu' - cpu) `div` 1000000000) ++ " msec")
+  return cpu'
+
+welcomeArch :: String
+welcomeArch = "This is the system compiled with ghc."
+
+-- | selects the one with the later modification time of two
+selectLater :: FilePath -> FilePath -> IO FilePath
+selectLater x y = do
+  ex <- doesFileExist x
+  if not ex 
+    then return y --- which may not exist
+    else do
+      ey <- doesFileExist y
+      if not ey 
+        then return x
+        else do 
+          tx <- getModificationTime x
+          ty <- getModificationTime y
+          return $ if tx < ty then y else x
+
+-- | a file is considered modified also if it has not been read yet
+--
+-- new 23\/2\/2004: the environment ofs has just module names
+modifiedFiles :: [(FilePath,ModTime)] -> [FilePath] -> IO [FilePath]
+modifiedFiles ofs fs = do
+  filterM isModified fs
+ where
+  isModified file = case lookup (justModName file) ofs of
+    Just to -> do
+      t <- getModificationTime file
+      return $ to < t
+    _ -> return True
+
+  justModName = 
+    reverse . takeWhile (/='/') . tail . dropWhile (/='.') . reverse
+
+type ModTime = ClockTime
+
+laterModTime :: ModTime -> ModTime -> Bool
+laterModTime = (>)
+
+getModTime :: FilePath -> IO (Maybe ModTime)
+getModTime f = do
+  b <- doesFileExist f
+  if b then (getModificationTime f >>= return . Just) else return Nothing
+
+getNowTime :: IO ModTime
+getNowTime = getClockTime
-- 
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