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+/* rltty.h - tty driver-related definitions used by some library files. */
+
+/* Copyright (C) 1995 Free Software Foundation, Inc.
+
+ This file contains the Readline Library (the Library), a set of
+ routines for providing Emacs style line input to programs that ask
+ for it.
+
+ The Library 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 1, or (at your option)
+ any later version.
+
+ The Library 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.
+
+ The GNU General Public License is often shipped with GNU software, and
+ is generally kept in a file called COPYING or LICENSE. If you do not
+ have a copy of the license, write to the Free Software Foundation,
+ 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#if !defined (_RLTTY_H_)
+#define _RLTTY_H
+
+/* Posix systems use termios and the Posix signal functions. */
+#if defined (TERMIOS_TTY_DRIVER)
+# include <termios.h>
+#endif /* TERMIOS_TTY_DRIVER */
+
+/* System V machines use termio. */
+#if defined (TERMIO_TTY_DRIVER)
+# include <termio.h>
+# if !defined (TCOON)
+# define TCOON 1
+# endif
+#endif /* TERMIO_TTY_DRIVER */
+
+/* Other (BSD) machines use sgtty. */
+#if defined (NEW_TTY_DRIVER)
+# include <sgtty.h>
+#endif
+
+#include "rlwinsize.h"
+
+/* Define _POSIX_VDISABLE if we are not using the `new' tty driver and
+ it is not already defined. It is used both to determine if a
+ special character is disabled and to disable certain special
+ characters. Posix systems should set to 0, USG systems to -1. */
+#if !defined (NEW_TTY_DRIVER) && !defined (_POSIX_VDISABLE)
+# if defined (_SVR4_VDISABLE)
+# define _POSIX_VDISABLE _SVR4_VDISABLE
+# else
+# if defined (_POSIX_VERSION)
+# define _POSIX_VDISABLE 0
+# else /* !_POSIX_VERSION */
+# define _POSIX_VDISABLE -1
+# endif /* !_POSIX_VERSION */
+# endif /* !_SVR4_DISABLE */
+#endif /* !NEW_TTY_DRIVER && !_POSIX_VDISABLE */
+
+#endif /* _RLTTY_H_ */