From 2c19600a17390ad63b759956cd42912b0e0a5f42 Mon Sep 17 00:00:00 2001
From: bjorn <bjorn@bringert.net>
Date: Fri, 23 May 2008 06:31:52 +0000
Subject: [PATCH] Added GF.System.Readline and related modules back into
 src-3.0.

---
 src-3.0/GF/System/NoReadline.hs  | 27 +++++++++++++++++++++++++++
 src-3.0/GF/System/Readline.hs    | 27 +++++++++++++++++++++++++++
 src-3.0/GF/System/UseReadline.hs | 25 +++++++++++++++++++++++++
 3 files changed, 79 insertions(+)
 create mode 100644 src-3.0/GF/System/NoReadline.hs
 create mode 100644 src-3.0/GF/System/Readline.hs
 create mode 100644 src-3.0/GF/System/UseReadline.hs

diff --git a/src-3.0/GF/System/NoReadline.hs b/src-3.0/GF/System/NoReadline.hs
new file mode 100644
index 000000000..138ba4e28
--- /dev/null
+++ b/src-3.0/GF/System/NoReadline.hs
@@ -0,0 +1,27 @@
+----------------------------------------------------------------------
+-- |
+-- Module      : GF.System.NoReadline
+-- Maintainer  : BB
+-- Stability   : (stable)
+-- Portability : (portable)
+--
+-- > CVS $Date: 2005/05/10 15:04:01 $ 
+-- > CVS $Author: bringert $
+-- > CVS $Revision: 1.1 $
+--
+-- Do not use readline.
+-----------------------------------------------------------------------------
+
+module GF.System.NoReadline (fetchCommand) where
+
+import System.IO.Error (try)
+import System.IO (stdout,hFlush)
+
+fetchCommand :: String -> IO (String)
+fetchCommand s = do
+  putStr s
+  hFlush stdout
+  res <- try getLine
+  case res of
+   Left e -> return "q"
+   Right l -> return l
diff --git a/src-3.0/GF/System/Readline.hs b/src-3.0/GF/System/Readline.hs
new file mode 100644
index 000000000..c12493f98
--- /dev/null
+++ b/src-3.0/GF/System/Readline.hs
@@ -0,0 +1,27 @@
+{-# OPTIONS -cpp #-}
+
+----------------------------------------------------------------------
+-- |
+-- Module      : GF.System.Readline
+-- Maintainer  : BB
+-- Stability   : (stable)
+-- Portability : (portable)
+--
+-- > CVS $Date: 2005/05/10 15:04:01 $ 
+-- > CVS $Author: bringert $
+-- > CVS $Revision: 1.2 $
+--
+-- Uses the right readline library to read user input.
+-----------------------------------------------------------------------------
+
+module GF.System.Readline (fetchCommand) where
+
+#ifdef USE_READLINE
+
+import GF.System.UseReadline (fetchCommand)
+
+#else
+
+import GF.System.NoReadline (fetchCommand)
+
+#endif
diff --git a/src-3.0/GF/System/UseReadline.hs b/src-3.0/GF/System/UseReadline.hs
new file mode 100644
index 000000000..c84b9d7f4
--- /dev/null
+++ b/src-3.0/GF/System/UseReadline.hs
@@ -0,0 +1,25 @@
+----------------------------------------------------------------------
+-- |
+-- Module      : GF.System.UseReadline
+-- Maintainer  : BB
+-- Stability   : (stable)
+-- Portability : (portable)
+--
+-- > CVS $Date: 2005/05/10 15:04:01 $ 
+-- > CVS $Author: bringert $
+-- > CVS $Revision: 1.1 $
+--
+-- Use GNU readline
+-----------------------------------------------------------------------------
+
+module GF.System.UseReadline (fetchCommand) where
+
+import System.Console.Readline (readline, addHistory)
+
+fetchCommand :: String -> IO (String)
+fetchCommand s = do
+  res <- readline s
+  case res of
+   Nothing -> return "q"
+   Just s -> do addHistory s
+                return s