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+;; Copyright (C) 1993, 1994, 1995 Free Software Foundation, Inc.
+;; 
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2, or (at your option)
+;; any later version.
+;; 
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+;; 
+;; You should have received a copy of the GNU General Public License
+;; along with this software; see the file COPYING.  If not, write to
+;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+;;
+;; As a special exception, the Free Software Foundation gives permission
+;; for additional uses of the text contained in its release of GUILE.
+;;
+;; The exception is that, if you link the GUILE library with other files
+;; to produce an executable, this does not by itself cause the
+;; resulting executable to be covered by the GNU General Public License.
+;; Your use of that executable is in no way restricted on account of
+;; linking the GUILE library code into it.
+;;
+;; This exception does not however invalidate any other reasons why
+;; the executable file might be covered by the GNU General Public License.
+;;
+;; This exception applies only to the code released by the
+;; Free Software Foundation under the name GUILE.  If you copy
+;; code from other Free Software Foundation releases into a copy of
+;; GUILE, as the General Public License permits, the exception does
+;; not apply to the code that you add in this way.  To avoid misleading
+;; anyone as to the status of such modified files, you must delete
+;; this exception notice from them.
+;;
+;; If you write modifications of your own for GUILE, it is your choice
+;; whether to permit this exception to apply to your modifications.
+;; If you do not wish that, delete this exception notice.  
+
+;;;; "split.scm", split input, output, and error streams into windows.
+;;; Author: Aubrey Jaffer.
+
+(require 'curses)
+(define *stdscr* (initscr))
+(nocbreak)
+(echo)
+(nl)
+(define subwindow-height (max 2 (quotient (output-port-height) 5)))
+(define *output-window*
+  (newwin (- (output-port-height) (* 2 subwindow-height) 2)
+	  (output-port-width)
+	  0
+	  0))
+(define *input-window*
+  (newwin subwindow-height
+	  (output-port-width)
+	  (- (output-port-height) (* 2 subwindow-height) 1)
+	  0))
+(define *error-window*
+  (newwin subwindow-height
+	  (output-port-width)
+	  (- (output-port-height) subwindow-height)
+	  0))
+(wmove *stdscr* (- (output-port-height) subwindow-height 1) 0)
+(wstandout *stdscr*)
+(display (make-string (output-port-width) #\-) *stdscr*)
+(wmove *stdscr* (- (output-port-height) (* 2 subwindow-height) 2) 0)
+(display (make-string (output-port-width) #\-) *stdscr*)
+(wstandend *stdscr*)
+(touchwin *stdscr*)
+(force-output *stdscr*)
+(scrollok *output-window* #t)
+(scrollok *input-window* #t)
+(scrollok *error-window* #t)
+(define *default-output-port* (set-current-output-port *output-window*))
+(define *default-input-port* (set-current-input-port *input-window*))
+(define *default-error-port* (set-current-error-port *error-window*))
+(leaveok *output-window* #t)
+(leaveok *input-window* #f)
+(leaveok *error-window* #t)
+
+(define (unsplit)
+  (cond ((endwin)
+	 (set-current-output-port *default-output-port*)
+	 (set-current-input-port *default-input-port*)
+	 (set-current-error-port *default-error-port*))))