--- gforth/engine/io.h	1998/05/02 21:29:02	1.2
+++ gforth/engine/io.h	2012/12/31 15:25:19	1.18
@@ -1,12 +1,12 @@
 /* Input driver header
 
-  Copyright (C) 1995 Free Software Foundation, Inc.
+  Copyright (C) 1995,1996,1997,1998,1999,2003,2007,2012 Free Software Foundation, Inc.
 
   This file is part of Gforth.
 
   Gforth 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
+  as published by the Free Software Foundation, either version 3
   of the License, or (at your option) any later version.
 
   This program is distributed in the hope that it will be useful,
@@ -15,33 +15,31 @@
   GNU General Public License for more details.
 
   You should have received a copy of the GNU General Public License
-  along with this program; if not, write to the Free Software
-  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+  along with this program; if not, see http://www.gnu.org/licenses/.
 */
 
 #include <setjmp.h>
 
-extern jmp_buf throw_jmp_buf;
+extern PER_THREAD jmp_buf * throw_jmp_handler;
 
-#ifdef MSDOS
+#if defined(MSDOS) || defined(SHARC)
 #  define prep_terminal()
 #  define deprep_terminal()
 #  include <conio.h>
 
-#  define key()		getch()
-#  define key_query	FLAG(kbhit())
+#  define key(stdin)		getch()
+#  define key_query(stdin)	FLAG(kbhit())
 #else
-unsigned char getkey(FILE *);
+Cell getkey(FILE *);
 long key_avail(FILE *);
 void prep_terminal(void);
 void deprep_terminal(void);
 void get_winsize(void);
 
-#  define key()		getkey(stdin)
-#  define key_query	-(!!key_avail(stdin)) /* !! FLAG(...)? - anton */
-         		/* flag was originally wrong -- lennart */
+#  define key(stdin)		getkey(stdin)
+#  define key_query(stdin)	FLAG(!!key_avail(stdin))
+         		/* FLAG only negates, key_avail may return the number available */
 #endif
 
-void install_signal_handlers(void);
 extern UCell rows, cols;
 extern int terminal_prepped;