diff --git a/ncurses/curses.priv.h b/ncurses/curses.priv.h
new file mode 100644
index 0000000..29e1319
--- /dev/null
+++ b/ncurses/curses.priv.h
@@ -0,0 +1,1722 @@
+/****************************************************************************
+ * Copyright (c) 1998-2007,2008 Free Software Foundation, Inc.              *
+ *                                                                          *
+ * Permission is hereby granted, free of charge, to any person obtaining a  *
+ * copy of this software and associated documentation files (the            *
+ * "Software"), to deal in the Software without restriction, including      *
+ * without limitation the rights to use, copy, modify, merge, publish,      *
+ * distribute, distribute with modifications, sublicense, and/or sell       *
+ * copies of the Software, and to permit persons to whom the Software is    *
+ * furnished to do so, subject to the following conditions:                 *
+ *                                                                          *
+ * The above copyright notice and this permission notice shall be included  *
+ * in all copies or substantial portions of the Software.                   *
+ *                                                                          *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
+ * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
+ * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
+ *                                                                          *
+ * Except as contained in this notice, the name(s) of the above copyright   *
+ * holders shall not be used in advertising or otherwise to promote the     *
+ * sale, use or other dealings in this Software without prior written       *
+ * authorization.                                                           *
+ ****************************************************************************/
+
+/****************************************************************************
+ *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
+ *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
+ *     and: Thomas E. Dickey                        1996-on                 *
+ ****************************************************************************/
+
+
+/*
+ * $Id: curses.priv.h,v 1.394 2008/10/04 21:37:45 tom Exp $
+ *
+ *	curses.priv.h
+ *
+ *	Header file for curses library objects which are private to
+ *	the library.
+ *
+ */
+
+#ifndef CURSES_PRIV_H
+#define CURSES_PRIV_H 1
+
+#include <ncurses_dll.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <ncurses_cfg.h>
+
+#if USE_RCS_IDS
+#define MODULE_ID(id) static const char Ident[] = id;
+#else
+#define MODULE_ID(id) /*nothing*/
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#if HAVE_SYS_BSDTYPES_H
+#include <sys/bsdtypes.h>	/* needed for ISC */
+#endif
+
+#if HAVE_LIMITS_H
+# include <limits.h>
+#elif HAVE_SYS_PARAM_H
+# include <sys/param.h>
+#endif
+
+#include <assert.h>
+#include <stdio.h>
+
+#include <errno.h>
+
+#ifndef PATH_MAX
+# if defined(_POSIX_PATH_MAX)
+#  define PATH_MAX _POSIX_PATH_MAX
+# elif defined(MAXPATHLEN)
+#  define PATH_MAX MAXPATHLEN
+# else
+#  define PATH_MAX 255	/* the Posix minimum path-size */
+# endif
+#endif
+
+#if DECL_ERRNO
+extern int errno;
+#endif
+
+#include <nc_panel.h>
+
+/* Some systems have a broken 'select()', but workable 'poll()'.  Use that */
+#if HAVE_WORKING_POLL
+#define USE_FUNC_POLL 1
+#if HAVE_POLL_H
+#include <poll.h>
+#else
+#include <sys/poll.h>
+#endif
+#else
+#define USE_FUNC_POLL 0
+#endif
+
+/* include signal.h before curses.h to work-around defect in glibc 2.1.3 */
+#include <signal.h>
+
+/* Alessandro Rubini's GPM (general-purpose mouse) */
+#if HAVE_LIBGPM && HAVE_GPM_H
+#define USE_GPM_SUPPORT 1
+#else
+#define USE_GPM_SUPPORT 0
+#endif
+
+/* QNX mouse support */
+#if defined(__QNX__) && !defined(__QNXNTO__)
+#define USE_QNX_MOUSE 1
+#else
+#define USE_QNX_MOUSE 0
+#endif
+
+/* EMX mouse support */
+#ifdef __EMX__
+#define USE_EMX_MOUSE 1
+#else
+#define USE_EMX_MOUSE 0
+#endif
+
+#define DEFAULT_MAXCLICK 166
+#define EV_MAX		8	/* size of mouse circular event queue */
+
+/*
+ * If we don't have signals to support it, don't add a sigwinch handler.
+ * In any case, resizing is an extended feature.  Use it if we've got it.
+ */
+#if !NCURSES_EXT_FUNCS
+#undef HAVE_SIZECHANGE
+#define HAVE_SIZECHANGE 0
+#endif
+
+#if HAVE_SIZECHANGE && USE_SIGWINCH && defined(SIGWINCH)
+#define USE_SIZECHANGE 1
+#else
+#define USE_SIZECHANGE 0
+#undef USE_SIGWINCH
+#define USE_SIGWINCH 0
+#endif
+
+/*
+ * If desired, one can configure this, disabling environment variables that
+ * point to custom terminfo/termcap locations.
+ */
+#ifdef USE_ROOT_ENVIRON
+#define use_terminfo_vars() 1
+#else
+#define use_terminfo_vars() _nc_env_access()
+extern NCURSES_EXPORT(int) _nc_env_access (void);
+#endif
+
+/*
+ * Not all platforms have memmove; some have an equivalent bcopy.  (Some may
+ * have neither).
+ */
+#if USE_OK_BCOPY
+#define memmove(d,s,n) bcopy(s,d,n)
+#elif USE_MY_MEMMOVE
+#define memmove(d,s,n) _nc_memmove(d,s,n)
+extern NCURSES_EXPORT(void *) _nc_memmove (void *, const void *, size_t);
+#endif
+
+/*
+ * Scroll hints are useless when hashmap is used
+ */
+#if !USE_SCROLL_HINTS
+#if !USE_HASHMAP
+#define USE_SCROLL_HINTS 1
+#else
+#define USE_SCROLL_HINTS 0
+#endif
+#endif
+
+#if USE_SCROLL_HINTS
+#define if_USE_SCROLL_HINTS(stmt) stmt
+#else
+#define if_USE_SCROLL_HINTS(stmt) /*nothing*/
+#endif
+
+/*
+ * Note:  ht/cbt expansion flakes out randomly under Linux 1.1.47, but only
+ * when we're throwing control codes at the screen at high volume.  To see
+ * this, re-enable USE_HARD_TABS and run worm for a while.  Other systems
+ * probably don't want to define this either due to uncertainties about tab
+ * delays and expansion in raw mode.
+ */
+
+#define TRIES struct tries
+typedef TRIES {
+	TRIES    *child;            /* ptr to child.  NULL if none          */
+	TRIES    *sibling;          /* ptr to sibling.  NULL if none        */
+	unsigned char    ch;        /* character at this node               */
+	unsigned short   value;     /* code of string so far.  0 if none.   */
+#undef TRIES
+} TRIES;
+
+/*
+ * Common/troublesome character definitions
+ */
+#define StringOf(ch) {ch, 0}
+
+#define L_BRACE '{'
+#define R_BRACE '}'
+#define S_QUOTE '\''
+#define D_QUOTE '"'
+
+#define VT_ACSC "``aaffggiijjkkllmmnnooppqqrrssttuuvvwwxxyyzz{{||}}~~"
+
+/*
+ * Structure for palette tables
+ */
+
+typedef struct
+{
+    short red, green, blue;	/* what color_content() returns */
+    short r, g, b;		/* params to init_color() */
+    int init;			/* true if we called init_color() */
+}
+color_t;
+
+#define MAXCOLUMNS    135
+#define MAXLINES      66
+#define FIFO_SIZE     MAXCOLUMNS+2  /* for nocbreak mode input */
+
+#define ACS_LEN       128
+
+#define WINDOWLIST struct _win_list
+
+#if USE_WIDEC_SUPPORT
+#define _nc_bkgd    _bkgrnd
+#else
+#undef _XOPEN_SOURCE_EXTENDED
+#define _nc_bkgd    _bkgd
+#define wgetbkgrnd(win, wch)	*wch = win->_bkgd
+#define wbkgrnd	    wbkgd
+#endif
+
+#undef NCURSES_OPAQUE
+#define NCURSES_INTERNALS 1
+#define NCURSES_OPAQUE 0
+
+#include <curses.h>	/* we'll use -Ipath directive to get the right one! */
+#include <term.h>
+#include <term_entry.h>
+#include <nc_tparm.h>
+
+#if NCURSES_EXT_COLORS && USE_WIDEC_SUPPORT
+#define if_EXT_COLORS(stmt)	stmt
+#define NetPair(value,p)	(value).ext_color = (p), \
+				AttrOf(value) &= ALL_BUT_COLOR, \
+				AttrOf(value) |= (A_COLOR & COLOR_PAIR((p > 255) ? 255 : p))
+#define SetPair(value,p)	(value).ext_color = (p)
+#define GetPair(value)		(value).ext_color
+#define unColor(n)		(AttrOf(n) & ALL_BUT_COLOR)
+#define GET_WINDOW_PAIR(w)	(w)->_color
+#define SET_WINDOW_PAIR(w,p)	(w)->_color = (p)
+#define SameAttrOf(a,b)		(AttrOf(a) == AttrOf(b) && GetPair(a) == GetPair(b))
+#define VIDATTR(attr, pair)	vid_attr(attr, pair, 0)
+#else
+#define if_EXT_COLORS(stmt)	/* nothing */
+#define SetPair(value,p)	RemAttr(value, A_COLOR), \
+				SetAttr(value, AttrOf(value) | (A_COLOR & COLOR_PAIR(p)))
+#define GetPair(value)		PAIR_NUMBER(AttrOf(value))
+#define unColor(n)		(AttrOf(n) & ALL_BUT_COLOR)
+#define GET_WINDOW_PAIR(w)	PAIR_NUMBER(WINDOW_ATTRS(w))
+#define SET_WINDOW_PAIR(w,p)	WINDOW_ATTRS(w) &= ALL_BUT_COLOR, \
+				WINDOW_ATTRS(w) |= (A_COLOR & COLOR_PAIR(p))
+#define SameAttrOf(a,b)		(AttrOf(a) == AttrOf(b))
+#define VIDATTR(attr, pair)	vidattr(attr)
+#endif
+
+#if NCURSES_NO_PADDING
+#define GetNoPadding(sp)	((sp) ? (sp)->_no_padding : _nc_prescreen._no_padding)
+#define SetNoPadding(sp)	_nc_set_no_padding(sp)
+extern NCURSES_EXPORT(void) _nc_set_no_padding(SCREEN *);
+#else
+#define GetNoPadding(sp)	FALSE
+#define SetNoPadding(sp)	/*nothing*/
+#endif
+
+#define WINDOW_ATTRS(w)		((w)->_attrs)
+
+#define SCREEN_ATTRS(s)		(*((s)->_current_attr))
+#define GET_SCREEN_PAIR(s)	GetPair(SCREEN_ATTRS(s))
+#define SET_SCREEN_PAIR(s,p)	SetPair(SCREEN_ATTRS(s), p)
+
+#if USE_REENTRANT
+NCURSES_EXPORT(int *) _nc_ptr_Lines (void);
+NCURSES_EXPORT(int *) _nc_ptr_Cols (void);
+#define ptrLines() (SP ? &(SP->_LINES) : &(_nc_prescreen._LINES))
+#define ptrCols()  (SP ? &(SP->_COLS)  : &(_nc_prescreen._COLS))
+#define SET_LINES(value) *_nc_ptr_Lines() = value
+#define SET_COLS(value)  *_nc_ptr_Cols() = value
+#else
+#define ptrLines() &LINES
+#define ptrCols()  &COLS
+#define SET_LINES(value) LINES = value
+#define SET_COLS(value)  COLS = value
+#endif
+
+#define TR_MUTEX(data) _tracef("%s@%d: me:%08lX COUNT:%2u/%2d/%6d/%2d/%s%9u: " #data, \
+	    __FILE__, __LINE__, \
+	    (unsigned long) (pthread_self()), \
+	    data.__data.__lock, \
+	    data.__data.__count, \
+	    data.__data.__owner, \
+	    data.__data.__kind, \
+	    (data.__data.__nusers > 5) ? " OOPS " : "", \
+	    data.__data.__nusers)
+#define TR_GLOBAL_MUTEX(name) TR_MUTEX(_nc_globals.mutex_##name)
+
+#ifdef USE_PTHREADS
+
+#if USE_REENTRANT
+#include <pthread.h>
+extern NCURSES_EXPORT(void) _nc_init_pthreads(void);
+extern NCURSES_EXPORT(void) _nc_mutex_init(pthread_mutex_t *);
+extern NCURSES_EXPORT(int) _nc_mutex_lock(pthread_mutex_t *);
+extern NCURSES_EXPORT(int) _nc_mutex_trylock(pthread_mutex_t *);
+extern NCURSES_EXPORT(int) _nc_mutex_unlock(pthread_mutex_t *);
+#define _nc_lock_global(name)	_nc_mutex_lock(&_nc_globals.mutex_##name)
+#define _nc_try_global(name)    _nc_mutex_trylock(&_nc_globals.mutex_##name)
+#define _nc_unlock_global(name)	_nc_mutex_unlock(&_nc_globals.mutex_##name)
+
+#else
+#error POSIX threads requires --enable-reentrant option
+#endif
+
+#if USE_WEAK_SYMBOLS
+#if defined(__GNUC__)
+#  if defined __USE_ISOC99
+#    define _cat_pragma(exp)	_Pragma(#exp)
+#    define _weak_pragma(exp)	_cat_pragma(weak name)
+#  else
+#    define _weak_pragma(exp)
+#  endif
+#  define _declare(name)	__extension__ extern __typeof__(name) name
+#  define weak_symbol(name)	_weak_pragma(name) _declare(name) __attribute__((weak))
+#endif
+#endif
+
+#ifdef USE_PTHREADS
+#  if USE_WEAK_SYMBOLS
+weak_symbol(pthread_sigmask);
+weak_symbol(pthread_self);
+weak_symbol(pthread_equal);
+weak_symbol(pthread_mutex_init);
+weak_symbol(pthread_mutex_lock);
+weak_symbol(pthread_mutex_unlock);
+weak_symbol(pthread_mutex_trylock);
+weak_symbol(pthread_mutexattr_settype);
+weak_symbol(pthread_mutexattr_init);
+extern NCURSES_EXPORT(int) _nc_sigprocmask(int, const sigset_t *, sigset_t *);
+#    undef  sigprocmask
+#    define sigprocmask _nc_sigprocmask
+#  endif
+#endif
+
+#if HAVE_NANOSLEEP
+#undef HAVE_NANOSLEEP
+#define HAVE_NANOSLEEP 0	/* nanosleep suspends all threads */
+#endif
+
+#else /* !USE_PTHREADS */
+
+#define _nc_init_pthreads()	/* nothing */
+#define _nc_mutex_init(obj)	/* nothing */
+
+#define _nc_lock_global(name)	/* nothing */
+#define _nc_try_global(name)    0
+#define _nc_unlock_global(name)	/* nothing */
+
+#endif /* USE_PTHREADS */
+
+#if HAVE_GETTIMEOFDAY
+# define PRECISE_GETTIME 1
+# define TimeType struct timeval
+#else
+# define PRECISE_GETTIME 0
+# define TimeType time_t
+#endif
+
+/*
+ * Definitions for color pairs
+ */
+typedef unsigned colorpair_t;	/* type big enough to store PAIR_OF() */
+#define C_SHIFT 9		/* we need more bits than there are colors */
+#define C_MASK			((1 << C_SHIFT) - 1)
+#define PAIR_OF(fg, bg)		((((fg) & C_MASK) << C_SHIFT) | ((bg) & C_MASK))
+#define isDefaultColor(c)	((c) >= COLOR_DEFAULT || (c) < 0)
+
+#define COLOR_DEFAULT		C_MASK
+
+#if defined(USE_TERMLIB) && !defined(NEED_NCURSES_CH_T)
+
+#undef NCURSES_CH_T		/* this is not a termlib feature */
+#define NCURSES_CH_T void	/* ...but we need a pointer in SCREEN */
+
+#endif	/* USE_TERMLIB */
+
+#ifndef USE_TERMLIB
+struct ldat
+{
+	NCURSES_CH_T	*text;		/* text of the line */
+	NCURSES_SIZE_T	firstchar;	/* first changed character in the line */
+	NCURSES_SIZE_T	lastchar;	/* last changed character in the line */
+	NCURSES_SIZE_T	oldindex;	/* index of the line at last update */
+};
+#endif	/* USE_TERMLIB */
+
+typedef enum {
+	M_XTERM	= -1		/* use xterm's mouse tracking? */
+	,M_NONE = 0		/* no mouse device */
+#if USE_GPM_SUPPORT
+	,M_GPM			/* use GPM */
+#endif
+#if USE_SYSMOUSE
+	,M_SYSMOUSE		/* FreeBSD sysmouse on console */
+#endif
+} MouseType;
+
+/*
+ * Structures for scrolling.
+ */
+
+typedef struct {
+	unsigned long hashval;
+	int oldcount, newcount;
+	int oldindex, newindex;
+} HASHMAP;
+
+/*
+ * Structures for soft labels.
+ */
+
+struct _SLK;
+
+#ifndef USE_TERMLIB
+
+typedef struct
+{
+	char *ent_text;		/* text for the label */
+	char *form_text;	/* formatted text (left/center/...) */
+	int ent_x;		/* x coordinate of this field */
+	char dirty;		/* this label has changed */
+	char visible;		/* field is visible */
+} slk_ent;
+
+typedef struct _SLK {
+	char dirty;		/* all labels have changed */
+	char hidden;		/* soft labels are hidden */
+	WINDOW *win;
+	slk_ent *ent;
+	short  maxlab;		/* number of available labels */
+	short  labcnt;		/* number of allocated labels */
+	short  maxlen;		/* length of labels */
+	NCURSES_CH_T attr;	/* soft label attribute */
+} SLK;
+
+#endif	/* USE_TERMLIB */
+
+typedef	struct {
+	WINDOW *win;		/* the window used in the hook      */
+	int	line;		/* lines to take, < 0 => from bottom*/
+	int	(*hook)(WINDOW *, int); /* callback for user	    */
+} ripoff_t;
+
+#if USE_GPM_SUPPORT
+#undef buttons			/* term.h defines this, and gpm uses it! */
+#include <gpm.h>
+
+#ifdef HAVE_LIBDL
+/* link dynamically to GPM */
+typedef int *TYPE_gpm_fd;
+typedef int (*TYPE_Gpm_Open) (Gpm_Connect *, int);
+typedef int (*TYPE_Gpm_Close) (void);
+typedef int (*TYPE_Gpm_GetEvent) (Gpm_Event *);
+
+#define my_gpm_fd       SP->_mouse_gpm_fd
+#define my_Gpm_Open     SP->_mouse_Gpm_Open
+#define my_Gpm_Close    SP->_mouse_Gpm_Close
+#define my_Gpm_GetEvent SP->_mouse_Gpm_GetEvent
+#else
+/* link statically to GPM */
+#define my_gpm_fd       &gpm_fd
+#define my_Gpm_Open     Gpm_Open
+#define my_Gpm_Close    Gpm_Close
+#define my_Gpm_GetEvent Gpm_GetEvent
+#endif /* HAVE_LIBDL */
+#endif /* USE_GPM_SUPPORT */
+
+typedef struct {
+    long sequence;
+    bool last_used;
+    char *fix_sgr0;		/* this holds the filtered sgr0 string */
+    char *last_bufp;		/* help with fix_sgr0 leak */
+    TERMINAL *last_term;
+} TGETENT_CACHE;
+
+#define TGETENT_MAX 4
+
+/*
+ * State of tparm().
+ */
+#define STACKSIZE 20
+
+typedef struct {
+	union {
+		int	num;
+		char	*str;
+	} data;
+	bool num_type;
+} STACK_FRAME;
+
+#define NUM_VARS 26
+
+typedef struct {
+#ifdef TRACE
+	const char	*tname;
+#endif
+	const char	*tparam_base;
+
+	STACK_FRAME	stack[STACKSIZE];
+	int		stack_ptr;
+
+	char		*out_buff;
+	size_t		out_size;
+	size_t		out_used;
+
+	char		*fmt_buff;
+	size_t		fmt_size;
+
+	int		dynamic_var[NUM_VARS];
+	int		static_vars[NUM_VARS];
+} TPARM_STATE;
+
+typedef struct {
+    char *text;
+    size_t size;
+} TRACEBUF;
+
+/*
+ * The filesystem database normally uses a single-letter for the lower level
+ * of directories.  Use a hexadecimal code for filesystems which do not
+ * preserve mixed-case names.
+ */
+#if MIXEDCASE_FILENAMES
+#define LEAF_FMT "%c"
+#else
+#define LEAF_FMT "%02x"
+#endif
+
+/*
+ * TRACEMSE_FMT is no longer than 80 columns, there are 5 numbers that
+ * could at most have 10 digits, and the mask contains no more than 32 bits
+ * with each bit representing less than 15 characters.  Usually the whole
+ * string is less than 80 columns, but this buffer size is an absolute
+ * limit.
+ */
+#define TRACEMSE_MAX	(80 + (5 * 10) + (32 * 15))
+#define TRACEMSE_FMT	"id %2d  at (%2d, %2d, %2d) state %4lx = {" /* } */
+
+/*
+ * Global data which is not specific to a screen.
+ */
+typedef struct {
+	SIG_ATOMIC_T	have_sigwinch;
+	SIG_ATOMIC_T	cleanup_nested;
+
+	bool		init_signals;
+	bool		init_screen;
+
+	const char	*comp_sourcename;
+	char		*comp_termtype;
+
+	bool		have_tic_directory;
+	bool		keep_tic_directory;
+	const char	*tic_directory;
+
+	char		*dbi_list;
+	int		dbi_size;
+
+	char		*first_name;
+	char		**keyname_table;
+
+	int		slk_format;
+
+	char		*safeprint_buf;
+	size_t		safeprint_used;
+
+	TGETENT_CACHE	tgetent_cache[TGETENT_MAX];
+	int		tgetent_index;
+	long		tgetent_sequence;
+
+	WINDOWLIST	*_nc_windowlist;
+#define _nc_windows	_nc_globals._nc_windowlist
+
+#if USE_HOME_TERMINFO
+	char		*home_terminfo;
+#endif
+
+#if !USE_SAFE_SPRINTF
+	int		safeprint_cols;
+	int		safeprint_rows;
+#endif
+
+#ifdef TRACE
+	bool		init_trace;
+	char		trace_fname[PATH_MAX];
+	int		trace_level;
+	FILE		*trace_fp;
+
+	char		*tracearg_buf;
+	size_t		tracearg_used;
+
+	TRACEBUF	*tracebuf_ptr;
+	size_t		tracebuf_used;
+
+	char		tracechr_buf[40];
+
+	char		*tracedmp_buf;
+	size_t		tracedmp_used;
+
+	unsigned char	*tracetry_buf;
+	size_t		tracetry_used;
+
+	char		traceatr_color_buf[2][80];
+	int		traceatr_color_sel;
+	int		traceatr_color_last;
+
+#endif	/* TRACE */
+
+#ifdef USE_PTHREADS
+	pthread_mutex_t	mutex_curses;
+	pthread_mutex_t	mutex_tst_tracef;
+	pthread_mutex_t	mutex_tracef;
+	int		nested_tracef;
+	int		use_pthreads;
+#define _nc_use_pthreads	_nc_globals.use_pthreads
+#endif
+} NCURSES_GLOBALS;
+
+extern NCURSES_EXPORT_VAR(NCURSES_GLOBALS) _nc_globals;
+
+#define N_RIPS 5
+
+/*
+ * Global data which can be swept up into a SCREEN when one is created.
+ * It may be modified before the next SCREEN is created.
+ */
+typedef struct {
+	bool		use_env;
+	bool		filter_mode;
+	attr_t		previous_attr;
+	ripoff_t	rippedoff[N_RIPS];
+	ripoff_t	*rsp;
+	TPARM_STATE	tparm_state;
+	TTY		*saved_tty;	/* savetty/resetty information	    */
+#if NCURSES_NO_PADDING
+	bool		_no_padding;	/* flag to set if padding disabled  */
+#endif
+#if BROKEN_LINKER || USE_REENTRANT
+	chtype		*real_acs_map;
+	int		_LINES;
+	int		_COLS;
+	TERMINAL	*_cur_term;
+#ifdef TRACE
+	long		_outchars;
+	const char	*_tputs_trace;
+#endif
+#endif
+} NCURSES_PRESCREEN;
+
+#define ripoff_sp	_nc_prescreen.rsp
+#define ripoff_stack	_nc_prescreen.rippedoff
+
+extern NCURSES_EXPORT_VAR(NCURSES_PRESCREEN) _nc_prescreen;
+
+/*
+ * The SCREEN structure.
+ */
+
+struct screen {
+	int		_ifd;		/* input file ptr for screen	    */
+	FILE		*_ofp;		/* output file ptr for screen	    */
+	char		*_setbuf;	/* buffered I/O for output	    */
+	bool		_filtered;	/* filter() was called		    */
+	bool		_buffered;	/* setvbuf uses _setbuf data	    */
+	int		_checkfd;	/* filedesc for typeahead check	    */
+	TERMINAL	*_term;		/* terminal type information	    */
+	TTY		_saved_tty;	/* savetty/resetty information	    */
+	NCURSES_SIZE_T	_lines;		/* screen lines			    */
+	NCURSES_SIZE_T	_columns;	/* screen columns		    */
+
+	NCURSES_SIZE_T	_lines_avail;	/* lines available for stdscr	    */
+	NCURSES_SIZE_T	_topstolen;	/* lines stolen from top	    */
+
+	WINDOW		*_curscr;	/* current screen		    */
+	WINDOW		*_newscr;	/* virtual screen to be updated to  */
+	WINDOW		*_stdscr;	/* screen's full-window context	    */
+
+	TRIES		*_keytry;	/* "Try" for use with keypad mode   */
+	TRIES		*_key_ok;	/* Disabled keys via keyok(,FALSE)  */
+	bool		_tried;		/* keypad mode was initialized	    */
+	bool		_keypad_on;	/* keypad mode is currently on	    */
+
+	bool		_called_wgetch;	/* check for recursion in wgetch()  */
+	int		_fifo[FIFO_SIZE];	/* input push-back buffer   */
+	short		_fifohead,	/* head of fifo queue		    */
+			_fifotail,	/* tail of fifo queue		    */
+			_fifopeek,	/* where to peek for next char	    */
+			_fifohold;	/* set if breakout marked	    */
+
+	int		_endwin;	/* are we out of window mode?	    */
+	NCURSES_CH_T	*_current_attr; /* holds current attributes set	    */
+	int		_coloron;	/* is color enabled?		    */
+	int		_color_defs;	/* are colors modified		    */
+	int		_cursor;	/* visibility of the cursor	    */
+	int		_cursrow;	/* physical cursor row		    */
+	int		_curscol;	/* physical cursor column	    */
+	bool		_notty;		/* true if we cannot switch non-tty */
+	int		_nl;		/* True if NL -> CR/NL is on	    */
+	int		_raw;		/* True if in raw mode		    */
+	int		_cbreak;	/* 1 if in cbreak mode		    */
+					/* > 1 if in halfdelay mode	    */
+	int		_echo;		/* True if echo on		    */
+	int		_use_meta;	/* use the meta key?		    */
+	struct _SLK	*_slk;		/* ptr to soft key struct / NULL    */
+	int		slk_format;	/* selected format for this screen  */
+	/* cursor movement costs; units are 10ths of milliseconds */
+#if NCURSES_NO_PADDING
+	bool		_no_padding;	/* flag to set if padding disabled  */
+#endif
+	int		_char_padding;	/* cost of character put	    */
+	int		_cr_cost;	/* cost of (carriage_return)	    */
+	int		_cup_cost;	/* cost of (cursor_address)	    */
+	int		_home_cost;	/* cost of (cursor_home)	    */
+	int		_ll_cost;	/* cost of (cursor_to_ll)	    */
+#if USE_HARD_TABS
+	int		_ht_cost;	/* cost of (tab)		    */
+	int		_cbt_cost;	/* cost of (backtab)		    */
+#endif /* USE_HARD_TABS */
+	int		_cub1_cost;	/* cost of (cursor_left)	    */
+	int		_cuf1_cost;	/* cost of (cursor_right)	    */
+	int		_cud1_cost;	/* cost of (cursor_down)	    */
+	int		_cuu1_cost;	/* cost of (cursor_up)		    */
+	int		_cub_cost;	/* cost of (parm_cursor_left)	    */
+	int		_cuf_cost;	/* cost of (parm_cursor_right)	    */
+	int		_cud_cost;	/* cost of (parm_cursor_down)	    */
+	int		_cuu_cost;	/* cost of (parm_cursor_up)	    */
+	int		_hpa_cost;	/* cost of (column_address)	    */
+	int		_vpa_cost;	/* cost of (row_address)	    */
+	/* used in tty_update.c, must be chars */
+	int		_ed_cost;	/* cost of (clr_eos)		    */
+	int		_el_cost;	/* cost of (clr_eol)		    */
+	int		_el1_cost;	/* cost of (clr_bol)		    */
+	int		_dch1_cost;	/* cost of (delete_character)	    */
+	int		_ich1_cost;	/* cost of (insert_character)	    */
+	int		_dch_cost;	/* cost of (parm_dch)		    */
+	int		_ich_cost;	/* cost of (parm_ich)		    */
+	int		_ech_cost;	/* cost of (erase_chars)	    */
+	int		_rep_cost;	/* cost of (repeat_char)	    */
+	int		_hpa_ch_cost;	/* cost of (column_address)	    */
+	int		_cup_ch_cost;	/* cost of (cursor_address)	    */
+	int		_cuf_ch_cost;	/* cost of (parm_cursor_right)	    */
+	int		_inline_cost;	/* cost of inline-move		    */
+	int		_smir_cost;	/* cost of (enter_insert_mode)	    */
+	int		_rmir_cost;	/* cost of (exit_insert_mode)	    */
+	int		_ip_cost;	/* cost of (insert_padding)	    */
+	/* used in lib_mvcur.c */
+	char *		_address_cursor;
+	/* used in tty_update.c */
+	int		_scrolling;	/* 1 if terminal's smart enough to  */
+
+	/* used in lib_color.c */
+	color_t		*_color_table;	/* screen's color palette	     */
+	int		_color_count;	/* count of colors in palette	     */
+	colorpair_t	*_color_pairs;	/* screen's color pair list	     */
+	int		_pair_count;	/* count of color pairs		     */
+#if NCURSES_EXT_FUNCS
+	bool		_default_color; /* use default colors		     */
+	bool		_has_sgr_39_49; /* has ECMA default color support    */
+	int		_default_fg;	/* assumed default foreground	     */
+	int		_default_bg;	/* assumed default background	     */
+#endif
+	chtype		_ok_attributes; /* valid attributes for terminal     */
+	chtype		_xmc_suppress;	/* attributes to suppress if xmc     */
+	chtype		_xmc_triggers;	/* attributes to process if xmc	     */
+	chtype *	_acs_map;	/* the real alternate-charset map    */
+	bool *		_screen_acs_map;
+
+
+	/* used in lib_vidattr.c */
+	bool		_use_rmso;	/* true if we may use 'rmso'	     */
+	bool		_use_rmul;	/* true if we may use 'rmul'	     */
+
+	/*
+	 * These data correspond to the state of the idcok() and idlok()
+	 * functions.  A caveat is in order here:  the XSI and SVr4
+	 * documentation specify that these functions apply to the window which
+	 * is given as an argument.  However, ncurses implements this logic
+	 * only for the newscr/curscr update process, _not_ per-window.
+	 */
+	bool		_nc_sp_idlok;
+	bool		_nc_sp_idcok;
+#define _nc_idlok SP->_nc_sp_idlok
+#define _nc_idcok SP->_nc_sp_idcok
+
+	/*
+	 * These are the data that support the mouse interface.
+	 */
+	bool		_mouse_initialized;
+	MouseType	_mouse_type;
+	int		_maxclick;
+	bool		(*_mouse_event) (SCREEN *);
+	bool		(*_mouse_inline)(SCREEN *);
+	bool		(*_mouse_parse) (SCREEN *, int);
+	void		(*_mouse_resume)(SCREEN *);
+	void		(*_mouse_wrap)	(SCREEN *);
+	int		_mouse_fd;	/* file-descriptor, if any */
+	bool		_mouse_active;	/* true if initialized */
+	mmask_t		_mouse_mask;
+	NCURSES_CONST char *_mouse_xtermcap; /* string to enable/disable mouse */
+	MEVENT		_mouse_events[EV_MAX];	/* hold the last mouse event seen */
+	MEVENT		*_mouse_eventp;	/* next free slot in event queue */
+
+#if USE_GPM_SUPPORT
+	bool		_mouse_gpm_loaded;
+	bool		_mouse_gpm_found;
+#ifdef HAVE_LIBDL
+	void		*_dlopen_gpm;
+	TYPE_gpm_fd	_mouse_gpm_fd;
+	TYPE_Gpm_Open	_mouse_Gpm_Open;
+	TYPE_Gpm_Close	_mouse_Gpm_Close;
+	TYPE_Gpm_GetEvent _mouse_Gpm_GetEvent;
+#endif
+	Gpm_Connect	_mouse_gpm_connect;
+#endif /* USE_GPM_SUPPORT */
+
+#if USE_EMX_MOUSE
+	int		_emxmouse_wfd;
+	int		_emxmouse_thread;
+	int		_emxmouse_activated;
+	char		_emxmouse_buttons[4];
+#endif
+
+#if USE_SYSMOUSE
+	MEVENT		_sysmouse_fifo[FIFO_SIZE];
+	int		_sysmouse_head;
+	int		_sysmouse_tail;
+	int		_sysmouse_char_width;	/* character width */
+	int		_sysmouse_char_height;	/* character height */
+	int		_sysmouse_old_buttons;
+	int		_sysmouse_new_buttons;
+#endif
+
+	/*
+	 * This supports automatic resizing
+	 */
+#if USE_SIZECHANGE
+	int		(*_resize)(int,int);
+#endif
+
+	/*
+	 * These are data that support the proper handling of the panel stack on an
+	 * per screen basis.
+	 */
+	struct panelhook _panelHook;
+
+	bool		_sig_winch;
+	SCREEN		*_next_screen;
+
+	/* hashes for old and new lines */
+	unsigned long	*oldhash, *newhash;
+	HASHMAP		*hashtab;
+	int		hashtab_len;
+	int		*_oldnum_list;
+	int		_oldnum_size;
+
+	bool		_cleanup;	/* cleanup after int/quit signal */
+	int		(*_outch)(int); /* output handler if not putc */
+
+	int		_legacy_coding;	/* see use_legacy_coding() */
+
+#if USE_REENTRANT
+	char		_ttytype[NAMESIZE];
+	int		_ESCDELAY;
+	int		_TABSIZE;
+	int		_LINES;
+	int		_COLS;
+#ifdef TRACE
+	long		_outchars;
+	const char	*_tputs_trace;
+#endif
+#endif
+
+#ifdef TRACE
+	char		tracechr_buf[40];
+	char		tracemse_buf[TRACEMSE_MAX];
+#endif
+	/*
+	 * ncurses/ncursesw are the same up to this point.
+	 */
+#if USE_WIDEC_SUPPORT
+	/* recent versions of 'screen' have partially-working support for
+	 * UTF-8, but do not permit ACS at the same time (see tty_update.c).
+	 */
+	bool		_screen_acs_fix;
+#endif
+};
+
+extern NCURSES_EXPORT_VAR(SCREEN *) _nc_screen_chain;
+extern NCURSES_EXPORT_VAR(SIG_ATOMIC_T) _nc_have_sigwinch;
+
+	WINDOWLIST {
+	WINDOW	win;		/* first, so WINDOW_EXT() works */
+	WINDOWLIST *next;
+	SCREEN *screen;		/* screen containing the window */
+#ifdef _XOPEN_SOURCE_EXTENDED
+	char addch_work[(MB_LEN_MAX * 9) + 1];
+	unsigned addch_used;	/* number of bytes in addch_work[] */
+	int addch_x;		/* x-position for addch_work[] */
+	int addch_y;		/* y-position for addch_work[] */
+#endif
+};
+
+#define WINDOW_EXT(win,field) (((WINDOWLIST *)(win))->field)
+
+/* usually in <limits.h> */
+#ifndef UCHAR_MAX
+#define UCHAR_MAX 255
+#endif
+
+/* The terminfo source is assumed to be 7-bit ASCII */
+#define is7bits(c)	((unsigned)(c) < 128)
+
+/* Checks for isprint() should be done on 8-bit characters (non-wide) */
+#define is8bits(c)	((unsigned)(c) <= UCHAR_MAX)
+
+#ifndef min
+#define min(a,b)	((a) > (b)  ?  (b)  :  (a))
+#endif
+
+#ifndef max
+#define max(a,b)	((a) < (b)  ?  (b)  :  (a))
+#endif
+
+/* usually in <unistd.h> */
+#ifndef STDIN_FILENO
+#define STDIN_FILENO 0
+#endif
+
+#ifndef STDOUT_FILENO
+#define STDOUT_FILENO 1
+#endif
+
+#ifndef STDERR_FILENO
+#define STDERR_FILENO 2
+#endif
+
+#ifndef EXIT_SUCCESS
+#define EXIT_SUCCESS 0
+#endif
+
+#ifndef EXIT_FAILURE
+#define EXIT_FAILURE 1
+#endif
+
+#ifndef R_OK
+#define	R_OK	4		/* Test for read permission.  */
+#endif
+#ifndef W_OK
+#define	W_OK	2		/* Test for write permission.  */
+#endif
+#ifndef X_OK
+#define	X_OK	1		/* Test for execute permission.  */
+#endif
+#ifndef F_OK
+#define	F_OK	0		/* Test for existence.  */
+#endif
+
+#if HAVE_FCNTL_H
+#include <fcntl.h>		/* may define O_BINARY	*/
+#endif
+
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+
+#ifdef TRACE
+#if USE_REENTRANT
+#define COUNT_OUTCHARS(n) _nc_count_outchars(n);
+#else
+#define COUNT_OUTCHARS(n) _nc_outchars += (n);
+#endif
+#else
+#define COUNT_OUTCHARS(n) /* nothing */
+#endif
+
+#define RESET_OUTCHARS() COUNT_OUTCHARS(-_nc_outchars)
+
+#define UChar(c)	((unsigned char)(c))
+#define ChCharOf(c)	((c) & (chtype)A_CHARTEXT)
+#define ChAttrOf(c)	((c) & (chtype)A_ATTRIBUTES)
+
+#ifndef MB_LEN_MAX
+#define MB_LEN_MAX 8 /* should be >= MB_CUR_MAX, but that may be a function */
+#endif
+
+#if USE_WIDEC_SUPPORT /* { */
+#define isEILSEQ(status) (((size_t)status == (size_t)-1) && (errno == EILSEQ))
+
+#define init_mb(state)	memset(&state, 0, sizeof(state))
+
+#if NCURSES_EXT_COLORS
+#define NulColor	, 0
+#else
+#define NulColor	/* nothing */
+#endif
+
+#define NulChar		0,0,0,0	/* FIXME: see CCHARW_MAX */
+#define CharOf(c)	((c).chars[0])
+#define AttrOf(c)	((c).attr)
+
+#define AddAttr(c,a)	AttrOf(c) |=  ((a) & A_ATTRIBUTES)
+#define RemAttr(c,a)	AttrOf(c) &= ~((a) & A_ATTRIBUTES)
+#define SetAttr(c,a)	AttrOf(c) =   ((a) & A_ATTRIBUTES) | WidecExt(c)
+
+#define NewChar2(c,a)	{ a, { c, NulChar } NulColor }
+#define NewChar(ch)	NewChar2(ChCharOf(ch), ChAttrOf(ch))
+
+#if CCHARW_MAX == 5
+#define CharEq(a,b)	(((a).attr == (b).attr) \
+		       && (a).chars[0] == (b).chars[0] \
+		       && (a).chars[1] == (b).chars[1] \
+		       && (a).chars[2] == (b).chars[2] \
+		       && (a).chars[3] == (b).chars[3] \
+		       && (a).chars[4] == (b).chars[4] \
+			if_EXT_COLORS(&& (a).ext_color == (b).ext_color))
+#else
+#define CharEq(a,b)	(!memcmp(&(a), &(b), sizeof(a)))
+#endif
+
+#define SetChar(ch,c,a) do {							    \
+			    NCURSES_CH_T *_cp = &ch;				    \
+			    memset(_cp, 0, sizeof(ch));				    \
+			    _cp->chars[0] = (c);					    \
+			    _cp->attr = (a);					    \
+			    if_EXT_COLORS(SetPair(ch, PAIR_NUMBER(a)));		    \
+			} while (0)
+#define CHREF(wch)	(&wch)
+#define CHDEREF(wch)	(*wch)
+#define ARG_CH_T	NCURSES_CH_T *
+#define CARG_CH_T	const NCURSES_CH_T *
+#define PUTC_DATA	char PUTC_buf[MB_LEN_MAX]; int PUTC_i, PUTC_n; \
+			mbstate_t PUT_st; wchar_t PUTC_ch
+#define PUTC_INIT	init_mb (PUT_st)
+#define PUTC(ch,b)	do { if(!isWidecExt(ch)) {				    \
+			if (Charable(ch)) {					    \
+			    fputc(CharOf(ch), b);				    \
+			    COUNT_OUTCHARS(1);					    \
+			} else {						    \
+			    PUTC_INIT;						    \
+			    for (PUTC_i = 0; PUTC_i < CCHARW_MAX; ++PUTC_i) {	    \
+				PUTC_ch = (ch).chars[PUTC_i];			    \
+				if (PUTC_ch == L'\0')				    \
+				    break;					    \
+				PUTC_n = wcrtomb(PUTC_buf,			    \
+						 (ch).chars[PUTC_i], &PUT_st);	    \
+				if (PUTC_n <= 0) {				    \
+				    if (PUTC_ch && is8bits(PUTC_ch) && PUTC_i == 0) \
+					putc(PUTC_ch,b);			    \
+				    break;					    \
+				}						    \
+				fwrite(PUTC_buf, (unsigned) PUTC_n, 1, b);	    \
+			    }							    \
+			    COUNT_OUTCHARS(PUTC_i);				    \
+			} } } while (0)
+
+#define BLANK		NewChar2(' ', WA_NORMAL)
+#define ZEROS		NewChar2('\0', WA_NORMAL)
+#define ISBLANK(ch)	((ch).chars[0] == L' ' && (ch).chars[1] == L'\0')
+
+	/*
+	 * Wide characters cannot be represented in the A_CHARTEXT mask of
+	 * attr_t's but an application might have set a narrow character there.
+	 * But even in that case, it would only be a printable character, or
+	 * zero.  Otherwise we can use those bits to tell if a cell is the
+	 * first or extension part of a wide character.
+	 */
+#define WidecExt(ch)	(AttrOf(ch) & A_CHARTEXT)
+#define isWidecBase(ch)	(WidecExt(ch) == 1)
+#define isWidecExt(ch)	(WidecExt(ch) > 1 && WidecExt(ch) < 32)
+#define SetWidecExt(dst, ext)	AttrOf(dst) &= ~A_CHARTEXT,		\
+				AttrOf(dst) |= (ext + 1)
+
+#define if_WIDEC(code)  code
+#define Charable(ch)	((SP != 0 && SP->_legacy_coding)		\
+			 || (AttrOf(ch) & A_ALTCHARSET)			\
+			 || (!isWidecExt(ch) &&				\
+			     (ch).chars[1] == L'\0' &&			\
+			     _nc_is_charable(CharOf(ch))))
+
+#define L(ch)		L ## ch
+#else /* }{ */
+#define CharOf(c)	ChCharOf(c)
+#define AttrOf(c)	ChAttrOf(c)
+#define AddAttr(c,a)	c |= (a)
+#define RemAttr(c,a)	c &= ~((a) & A_ATTRIBUTES)
+#define SetAttr(c,a)	c = ((c) & ~A_ATTRIBUTES) | (a)
+#define NewChar(ch)	(ch)
+#define NewChar2(c,a)	((c) | (a))
+#define CharEq(a,b)	((a) == (b))
+#define SetChar(ch,c,a)	ch = (c) | (a)
+#define CHREF(wch)	wch
+#define CHDEREF(wch)	wch
+#define ARG_CH_T	NCURSES_CH_T
+#define CARG_CH_T	NCURSES_CH_T
+#define PUTC_DATA	int data = 0
+#define PUTC(ch,b)	do { data = CharOf(ch); putc(data,b); } while (0)
+
+#define BLANK		(' '|A_NORMAL)
+#define ZEROS		('\0'|A_NORMAL)
+#define ISBLANK(ch)	(CharOf(ch) == ' ')
+
+#define isWidecExt(ch)	(0)
+#define if_WIDEC(code) /* nothing */
+
+#define L(ch)		ch
+#endif /* } */
+
+#define AttrOfD(ch)	AttrOf(CHDEREF(ch))
+#define CharOfD(ch)	CharOf(CHDEREF(ch))
+#define SetChar2(wch,ch)    SetChar(wch,ChCharOf(ch),ChAttrOf(ch))
+
+#define BLANK_ATTR	A_NORMAL
+#define BLANK_TEXT	L(' ')
+
+#define CHANGED     -1
+
+#define LEGALYX(w, y, x) \
+	      ((w) != 0 && \
+		((x) >= 0 && (x) <= (w)->_maxx && \
+		 (y) >= 0 && (y) <= (w)->_maxy))
+
+#define CHANGED_CELL(line,col) \
+	if (line->firstchar == _NOCHANGE) \
+		line->firstchar = line->lastchar = col; \
+	else if ((col) < line->firstchar) \
+		line->firstchar = col; \
+	else if ((col) > line->lastchar) \
+		line->lastchar = col
+
+#define CHANGED_RANGE(line,start,end) \
+	if (line->firstchar == _NOCHANGE \
+	 || line->firstchar > (start)) \
+		line->firstchar = start; \
+	if (line->lastchar == _NOCHANGE \
+	 || line->lastchar < (end)) \
+		line->lastchar = end
+
+#define CHANGED_TO_EOL(line,start,end) \
+	if (line->firstchar == _NOCHANGE \
+	 || line->firstchar > (start)) \
+		line->firstchar = start; \
+	line->lastchar = end
+
+#define SIZEOF(v) (sizeof(v)/sizeof(v[0]))
+
+#define FreeIfNeeded(p)  if ((p) != 0) free(p)
+
+/* FreeAndNull() is not a comma-separated expression because some compilers
+ * do not accept a mixture of void with values.
+ */
+#define FreeAndNull(p)   free(p); p = 0
+
+#include <nc_alloc.h>
+
+/*
+ * TTY bit definition for converting tabs to spaces.
+ */
+#ifdef TAB3
+# define OFLAGS_TABS TAB3	/* POSIX specifies TAB3 */
+#else
+# ifdef XTABS
+#  define OFLAGS_TABS XTABS	/* XTABS is usually the "same" */
+# else
+#  ifdef OXTABS
+#   define OFLAGS_TABS OXTABS	/* the traditional BSD equivalent */
+#  else
+#   define OFLAGS_TABS 0
+#  endif
+# endif
+#endif
+
+/*
+ * Standardize/simplify common loops
+ */
+#define each_screen(p) p = _nc_screen_chain; p != 0; p = (p)->_next_screen
+#define each_window(p) p = _nc_windows; p != 0; p = (p)->next
+#define each_ripoff(p) p = ripoff_stack; (p - ripoff_stack) < N_RIPS; ++p
+
+/*
+ * Prefixes for call/return points of library function traces.  We use these to
+ * instrument the public functions so that the traces can be easily transformed
+ * into regression scripts.
+ */
+#define T_CALLED(fmt) "called {" fmt
+#define T_CREATE(fmt) "create :" fmt
+#define T_RETURN(fmt) "return }" fmt
+
+#ifdef TRACE
+
+#if USE_REENTRANT
+#define TPUTS_TRACE(s)	_nc_set_tputs_trace(s);
+#else
+#define TPUTS_TRACE(s)	_nc_tputs_trace = s;
+#endif
+
+#define START_TRACE() \
+	if ((_nc_tracing & TRACE_MAXIMUM) == 0) { \
+	    int t = _nc_getenv_num("NCURSES_TRACE"); \
+	    if (t >= 0) \
+		trace((unsigned) t); \
+	}
+
+/*
+ * Many of the _tracef() calls use static buffers; lock the trace state before
+ * trying to fill them.
+ */
+#if USE_REENTRANT
+#define USE_TRACEF(mask) _nc_use_tracef(mask)
+extern NCURSES_EXPORT(int)	_nc_use_tracef (unsigned);
+extern NCURSES_EXPORT(void)	_nc_locked_tracef (const char *, ...) GCC_PRINTFLIKE(1,2);
+#else
+#define USE_TRACEF(mask) (_nc_tracing & (mask))
+#define _nc_locked_tracef _tracef
+#endif
+
+#define TR(n, a)	if (USE_TRACEF(n)) _nc_locked_tracef a
+#define T(a)		TR(TRACE_CALLS, a)
+#define TRACE_RETURN(value,type) return _nc_retrace_##type(value)
+
+#define returnAttr(code)	TRACE_RETURN(code,attr_t)
+#define returnBits(code)	TRACE_RETURN(code,unsigned)
+#define returnBool(code)	TRACE_RETURN(code,bool)
+#define returnCPtr(code)	TRACE_RETURN(code,cptr)
+#define returnCVoidPtr(code)	TRACE_RETURN(code,cvoid_ptr)
+#define returnChar(code)	TRACE_RETURN(code,chtype)
+#define returnCode(code)	TRACE_RETURN(code,int)
+#define returnPtr(code)		TRACE_RETURN(code,ptr)
+#define returnSP(code)		TRACE_RETURN(code,sp)
+#define returnVoid		T((T_RETURN(""))); return
+#define returnVoidPtr(code)	TRACE_RETURN(code,void_ptr)
+#define returnWin(code)		TRACE_RETURN(code,win)
+
+extern NCURSES_EXPORT(NCURSES_BOOL)     _nc_retrace_bool (NCURSES_BOOL);
+extern NCURSES_EXPORT(NCURSES_CONST void *) _nc_retrace_cvoid_ptr (NCURSES_CONST void *);
+extern NCURSES_EXPORT(SCREEN *)         _nc_retrace_sp (SCREEN *);
+extern NCURSES_EXPORT(WINDOW *)         _nc_retrace_win (WINDOW *);
+extern NCURSES_EXPORT(attr_t)           _nc_retrace_attr_t (attr_t);
+extern NCURSES_EXPORT(char *)           _nc_retrace_ptr (char *);
+extern NCURSES_EXPORT(char *)           _nc_trace_ttymode(TTY *tty);
+extern NCURSES_EXPORT(char *)           _nc_varargs (const char *, va_list);
+extern NCURSES_EXPORT(chtype)           _nc_retrace_chtype (chtype);
+extern NCURSES_EXPORT(const char *)     _nc_altcharset_name(attr_t, chtype);
+extern NCURSES_EXPORT(const char *)     _nc_retrace_cptr (const char *);
+extern NCURSES_EXPORT(int)              _nc_retrace_int (int);
+extern NCURSES_EXPORT(unsigned)         _nc_retrace_unsigned (unsigned);
+extern NCURSES_EXPORT(void *)           _nc_retrace_void_ptr (void *);
+extern NCURSES_EXPORT(void)             _nc_fifo_dump (SCREEN *);
+
+#if USE_REENTRANT
+NCURSES_WRAPPED_VAR(long, _nc_outchars);
+NCURSES_WRAPPED_VAR(const char *, _nc_tputs_trace);
+#define _nc_outchars       NCURSES_PUBLIC_VAR(_nc_outchars())
+#define _nc_tputs_trace    NCURSES_PUBLIC_VAR(_nc_tputs_trace())
+extern NCURSES_EXPORT(void)		_nc_set_tputs_trace (const char *);
+extern NCURSES_EXPORT(void)		_nc_count_outchars (long);
+#else
+extern NCURSES_EXPORT_VAR(const char *) _nc_tputs_trace;
+extern NCURSES_EXPORT_VAR(long)         _nc_outchars;
+#endif
+
+extern NCURSES_EXPORT_VAR(unsigned)     _nc_tracing;
+
+#if USE_WIDEC_SUPPORT
+extern NCURSES_EXPORT(const char *) _nc_viswbuf2 (int, const wchar_t *);
+extern NCURSES_EXPORT(const char *) _nc_viswbufn (const wchar_t *, int);
+#endif
+
+extern NCURSES_EXPORT(const char *) _nc_viscbuf2 (int, const NCURSES_CH_T *, int);
+extern NCURSES_EXPORT(const char *) _nc_viscbuf (const NCURSES_CH_T *, int);
+
+#else /* !TRACE */
+
+#define START_TRACE() /* nothing */
+
+#define T(a)
+#define TR(n, a)
+#define TPUTS_TRACE(s)
+
+#define returnAttr(code)	return code
+#define returnBits(code)	return code
+#define returnBool(code)	return code
+#define returnCPtr(code)	return code
+#define returnCVoidPtr(code)	return code
+#define returnChar(code)	return code
+#define returnCode(code)	return code
+#define returnPtr(code)		return code
+#define returnSP(code)		return code
+#define returnVoid		return
+#define returnVoidPtr(code)	return code
+#define returnWin(code)		return code
+
+#endif /* TRACE/!TRACE */
+
+/*
+ * Return-codes for tgetent() and friends.
+ */
+#define TGETENT_YES  1		/* entry is found */
+#define TGETENT_NO   0		/* entry is not found */
+#define TGETENT_ERR -1		/* an error occurred */
+
+extern NCURSES_EXPORT(const char *) _nc_visbuf2 (int, const char *);
+extern NCURSES_EXPORT(const char *) _nc_visbufn (const char *, int);
+
+#define EMPTY_MODULE(name) \
+extern	NCURSES_EXPORT(void) name (void); \
+	NCURSES_EXPORT(void) name (void) { }
+
+#define ALL_BUT_COLOR ((chtype)~(A_COLOR))
+#define NONBLANK_ATTR (A_NORMAL|A_BOLD|A_DIM|A_BLINK)
+#define XMC_CHANGES(c) ((c) & SP->_xmc_suppress)
+
+#define toggle_attr_on(S,at) {\
+   if (PAIR_NUMBER(at) > 0) {\
+      (S) = ((S) & ALL_BUT_COLOR) | (at);\
+   } else {\
+      (S) |= (at);\
+   }\
+   TR(TRACE_ATTRS, ("new attribute is %s", _traceattr((S))));}
+
+
+#define toggle_attr_off(S,at) {\
+   if (PAIR_NUMBER(at) > 0) {\
+      (S) &= ~(at|A_COLOR);\
+   } else {\
+      (S) &= ~(at);\
+   }\
+   TR(TRACE_ATTRS, ("new attribute is %s", _traceattr((S))));}
+
+#define DelCharCost(count) \
+		((parm_dch != 0) \
+		? SP->_dch_cost \
+		: ((delete_character != 0) \
+			? (SP->_dch1_cost * count) \
+			: INFINITY))
+
+#define InsCharCost(count) \
+		((parm_ich != 0) \
+		? SP->_ich_cost \
+		: ((enter_insert_mode && exit_insert_mode) \
+		  ? SP->_smir_cost + SP->_rmir_cost + (SP->_ip_cost * count) \
+		  : ((insert_character != 0) \
+		    ? ((SP->_ich1_cost + SP->_ip_cost) * count) \
+		    : INFINITY)))
+
+#if USE_XMC_SUPPORT
+#define UpdateAttrs(c)	if (!SameAttrOf(SCREEN_ATTRS(SP), c)) { \
+				attr_t chg = AttrOf(SCREEN_ATTRS(SP)); \
+				VIDATTR(AttrOf(c), GetPair(c)); \
+				if (magic_cookie_glitch > 0 \
+				 && XMC_CHANGES((chg ^ AttrOf(SCREEN_ATTRS(SP))))) { \
+					T(("%s @%d before glitch %d,%d", \
+						__FILE__, __LINE__, \
+						SP->_cursrow, \
+						SP->_curscol)); \
+					_nc_do_xmc_glitch(chg); \
+				} \
+			}
+#else
+#define UpdateAttrs(c)	if (!SameAttrOf(SCREEN_ATTRS(SP), c)) \
+				VIDATTR(AttrOf(c), GetPair(c));
+#endif
+
+/*
+ * Macros to make additional parameter to implement wgetch_events()
+ */
+#ifdef NCURSES_WGETCH_EVENTS
+#define EVENTLIST_0th(param) param
+#define EVENTLIST_1st(param) param
+#define EVENTLIST_2nd(param) , param
+#else
+#define EVENTLIST_0th(param) void
+#define EVENTLIST_1st(param) /* nothing */
+#define EVENTLIST_2nd(param) /* nothing */
+#endif
+
+#if NCURSES_EXPANDED && NCURSES_EXT_FUNCS
+
+#undef  toggle_attr_on
+#define toggle_attr_on(S,at) _nc_toggle_attr_on(&(S), at)
+extern NCURSES_EXPORT(void) _nc_toggle_attr_on (attr_t *, attr_t);
+
+#undef  toggle_attr_off
+#define toggle_attr_off(S,at) _nc_toggle_attr_off(&(S), at)
+extern NCURSES_EXPORT(void) _nc_toggle_attr_off (attr_t *, attr_t);
+
+#undef  DelCharCost
+#define DelCharCost(count) _nc_DelCharCost(count)
+extern NCURSES_EXPORT(int) _nc_DelCharCost (int);
+
+#undef  InsCharCost
+#define InsCharCost(count) _nc_InsCharCost(count)
+extern NCURSES_EXPORT(int) _nc_InsCharCost (int);
+
+#undef  UpdateAttrs
+#define UpdateAttrs(c) _nc_UpdateAttrs(c)
+extern NCURSES_EXPORT(void) _nc_UpdateAttrs (NCURSES_CH_T);
+
+#else
+
+extern NCURSES_EXPORT(void) _nc_expanded (void);
+
+#endif
+
+#if !NCURSES_EXT_FUNCS
+#define set_escdelay(value) ESCDELAY = value
+#endif
+
+#if !HAVE_GETCWD
+#define getcwd(buf,len) getwd(buf)
+#endif
+
+/* charable.c */
+#if USE_WIDEC_SUPPORT
+extern NCURSES_EXPORT(bool) _nc_is_charable(wchar_t);
+extern NCURSES_EXPORT(int) _nc_to_char(wint_t);
+extern NCURSES_EXPORT(wint_t) _nc_to_widechar(int);
+#endif
+
+/* comp_captab.c */
+typedef struct {
+	short	nte_name;	/* offset of name to hash on */
+	int	nte_type;	/* BOOLEAN, NUMBER or STRING */
+	short	nte_index;	/* index of associated variable in its array */
+	short	nte_link;	/* index in table of next hash, or -1 */
+} name_table_data;
+
+typedef struct
+{
+	short	from;
+	short	to;
+	short	source;
+} alias_table_data;
+
+/* doupdate.c */
+#if USE_XMC_SUPPORT
+extern NCURSES_EXPORT(void) _nc_do_xmc_glitch (attr_t);
+#endif
+
+/* hardscroll.c */
+#if defined(TRACE) || defined(SCROLLDEBUG) || defined(HASHDEBUG)
+extern NCURSES_EXPORT(void) _nc_linedump (void);
+#endif
+
+/* lib_acs.c */
+extern NCURSES_EXPORT(void) _nc_init_acs (void);	/* corresponds to traditional 'init_acs()' */
+extern NCURSES_EXPORT(int) _nc_msec_cost (const char *const, int);  /* used by 'tack' program */
+
+/* lib_addch.c */
+#if USE_WIDEC_SUPPORT
+NCURSES_EXPORT(int) _nc_build_wch(WINDOW *win, ARG_CH_T ch);
+#endif
+
+/* lib_addstr.c */
+#if USE_WIDEC_SUPPORT && !defined(USE_TERMLIB)
+extern NCURSES_EXPORT(int) _nc_wchstrlen(const cchar_t *);
+#endif
+
+/* lib_color.c */
+extern NCURSES_EXPORT(bool) _nc_reset_colors(void);
+
+/* lib_getch.c */
+extern NCURSES_EXPORT(int) _nc_wgetch(WINDOW *, unsigned long *, int EVENTLIST_2nd(_nc_eventlist *));
+
+/* lib_insch.c */
+extern NCURSES_EXPORT(int) _nc_insert_ch(WINDOW *, chtype);
+
+/* lib_mvcur.c */
+#define INFINITY	1000000	/* cost: too high to use */
+
+extern NCURSES_EXPORT(void) _nc_mvcur_init (void);
+extern NCURSES_EXPORT(void) _nc_mvcur_resume (void);
+extern NCURSES_EXPORT(void) _nc_mvcur_wrap (void);
+
+extern NCURSES_EXPORT(int) _nc_scrolln (int, int, int, int);
+
+extern NCURSES_EXPORT(void) _nc_screen_init (void);
+extern NCURSES_EXPORT(void) _nc_screen_resume (void);
+extern NCURSES_EXPORT(void) _nc_screen_wrap (void);
+
+/* lib_mouse.c */
+extern NCURSES_EXPORT(int) _nc_has_mouse (void);
+
+/* lib_mvcur.c */
+#define INFINITY	1000000	/* cost: too high to use */
+#define BAUDBYTE	9	/* 9 = 7 bits + 1 parity + 1 stop */
+
+/* lib_setup.c */
+extern NCURSES_EXPORT(char *) _nc_get_locale(void);
+extern NCURSES_EXPORT(int) _nc_unicode_locale(void);
+extern NCURSES_EXPORT(int) _nc_locale_breaks_acs(TERMINAL *);
+extern NCURSES_EXPORT(int) _nc_setupterm(NCURSES_CONST char *, int, int *, bool);
+extern NCURSES_EXPORT(void) _nc_get_screensize(SCREEN *, int *, int *);
+
+/* lib_tstp.c */
+#if USE_SIGWINCH
+extern NCURSES_EXPORT(int) _nc_handle_sigwinch(SCREEN *);
+#else
+#define _nc_handle_sigwinch(a) /* nothing */
+#endif
+
+/* lib_ungetch.c */
+extern NCURSES_EXPORT(int) _nc_ungetch (SCREEN *, int);
+
+/* lib_wacs.c */
+#if USE_WIDEC_SUPPORT
+extern NCURSES_EXPORT(void) _nc_init_wacs(void);
+#endif
+
+typedef struct {
+    char *s_head;	/* beginning of the string (may be null) */
+    char *s_tail;	/* end of the string (may be null) */
+    size_t s_size;	/* current remaining size available */
+    size_t s_init;	/* total size available */
+} string_desc;
+
+/* strings.c */
+extern NCURSES_EXPORT(string_desc *) _nc_str_init (string_desc *, char *, size_t);
+extern NCURSES_EXPORT(string_desc *) _nc_str_null (string_desc *, size_t);
+extern NCURSES_EXPORT(string_desc *) _nc_str_copy (string_desc *, string_desc *);
+extern NCURSES_EXPORT(bool) _nc_safe_strcat (string_desc *, const char *);
+extern NCURSES_EXPORT(bool) _nc_safe_strcpy (string_desc *, const char *);
+
+#if !HAVE_STRSTR
+#define strstr _nc_strstr
+extern NCURSES_EXPORT(char *) _nc_strstr (const char *, const char *);
+#endif
+
+/* safe_sprintf.c */
+extern NCURSES_EXPORT(char *) _nc_printf_string (const char *, va_list);
+
+/* tries.c */
+extern NCURSES_EXPORT(int) _nc_add_to_try (TRIES **, const char *, unsigned);
+extern NCURSES_EXPORT(char *) _nc_expand_try (TRIES *, unsigned, int *, size_t);
+extern NCURSES_EXPORT(int) _nc_remove_key (TRIES **, unsigned);
+extern NCURSES_EXPORT(int) _nc_remove_string (TRIES **, const char *);
+
+/* elsewhere ... */
+extern NCURSES_EXPORT(ENTRY *) _nc_delink_entry (ENTRY *, TERMTYPE *);
+extern NCURSES_EXPORT(NCURSES_CONST char *) _nc_keyname (SCREEN *, int);
+extern NCURSES_EXPORT(NCURSES_CONST char *) _nc_unctrl (SCREEN *, chtype);
+extern NCURSES_EXPORT(SCREEN *) _nc_screen_of (WINDOW *);
+extern NCURSES_EXPORT(WINDOW *) _nc_makenew (int, int, int, int, int);
+extern NCURSES_EXPORT(char *) _nc_trace_buf (int, size_t);
+extern NCURSES_EXPORT(char *) _nc_trace_bufcat (int, const char *);
+extern NCURSES_EXPORT(char *) _nc_tracechar (SCREEN *, int);
+extern NCURSES_EXPORT(char *) _nc_tracemouse (SCREEN *, MEVENT const *);
+extern NCURSES_EXPORT(int) _nc_access (const char *, int);
+extern NCURSES_EXPORT(int) _nc_baudrate (int);
+extern NCURSES_EXPORT(int) _nc_freewin (WINDOW *);
+extern NCURSES_EXPORT(int) _nc_getenv_num (const char *);
+extern NCURSES_EXPORT(int) _nc_keypad (SCREEN *, bool);
+extern NCURSES_EXPORT(int) _nc_ospeed (int);
+extern NCURSES_EXPORT(int) _nc_outch (int);
+extern NCURSES_EXPORT(int) _nc_read_termcap_entry (const char *const, TERMTYPE *const);
+extern NCURSES_EXPORT(int) _nc_setupscreen (int, int, FILE *, bool, int);
+extern NCURSES_EXPORT(int) _nc_timed_wait (SCREEN *, int, int, int * EVENTLIST_2nd(_nc_eventlist *));
+extern NCURSES_EXPORT(void) _nc_do_color (short, short, bool, int (*)(int));
+extern NCURSES_EXPORT(void) _nc_flush (void);
+extern NCURSES_EXPORT(void) _nc_free_and_exit (int);
+extern NCURSES_EXPORT(void) _nc_free_entry (ENTRY *, TERMTYPE *);
+extern NCURSES_EXPORT(void) _nc_freeall (void);
+extern NCURSES_EXPORT(void) _nc_hash_map (void);
+extern NCURSES_EXPORT(void) _nc_init_keytry (SCREEN *);
+extern NCURSES_EXPORT(void) _nc_keep_tic_dir (const char *);
+extern NCURSES_EXPORT(void) _nc_make_oldhash (int i);
+extern NCURSES_EXPORT(void) _nc_scroll_oldhash (int n, int top, int bot);
+extern NCURSES_EXPORT(void) _nc_scroll_optimize (void);
+extern NCURSES_EXPORT(void) _nc_set_buffer (FILE *, bool);
+extern NCURSES_EXPORT(void) _nc_signal_handler (bool);
+extern NCURSES_EXPORT(void) _nc_synchook (WINDOW *);
+extern NCURSES_EXPORT(void) _nc_trace_tries (TRIES *);
+
+#if NO_LEAKS
+extern NCURSES_EXPORT(void) _nc_alloc_entry_leaks(void);
+extern NCURSES_EXPORT(void) _nc_captoinfo_leaks(void);
+extern NCURSES_EXPORT(void) _nc_codes_leaks(void);
+extern NCURSES_EXPORT(void) _nc_comp_captab_leaks(void);
+extern NCURSES_EXPORT(void) _nc_comp_scan_leaks(void);
+extern NCURSES_EXPORT(void) _nc_keyname_leaks(void);
+extern NCURSES_EXPORT(void) _nc_names_leaks(void);
+extern NCURSES_EXPORT(void) _nc_tgetent_leaks(void);
+#endif
+
+#ifndef USE_TERMLIB
+extern NCURSES_EXPORT(NCURSES_CH_T) _nc_render (WINDOW *, NCURSES_CH_T);
+extern NCURSES_EXPORT(int) _nc_waddch_nosync (WINDOW *, const NCURSES_CH_T);
+extern NCURSES_EXPORT(void) _nc_scroll_window (WINDOW *, int const, NCURSES_SIZE_T const, NCURSES_SIZE_T const, NCURSES_CH_T);
+#endif
+
+#if USE_WIDEC_SUPPORT && !defined(USE_TERMLIB)
+extern NCURSES_EXPORT(size_t) _nc_wcrtomb (char *, wchar_t, mbstate_t *);
+#endif
+
+#if USE_SIZECHANGE
+extern NCURSES_EXPORT(void) _nc_update_screensize (SCREEN *);
+#endif
+
+#if HAVE_RESIZETERM
+extern NCURSES_EXPORT(void) _nc_resize_margins (WINDOW *);
+#else
+#define _nc_resize_margins(wp) /* nothing */
+#endif
+
+#ifdef NCURSES_WGETCH_EVENTS
+extern NCURSES_EXPORT(int) _nc_eventlist_timeout(_nc_eventlist *);
+#else
+#define wgetch_events(win, evl) wgetch(win)
+#define wgetnstr_events(win, str, maxlen, evl) wgetnstr(win, str, maxlen)
+#endif
+
+/*
+ * Not everyone has vsscanf(), but we'd like to use it for scanw().
+ */
+#if !HAVE_VSSCANF
+extern int vsscanf(const char *str, const char *format, va_list __arg);
+#endif
+
+/* scroll indices */
+extern NCURSES_EXPORT_VAR(int *) _nc_oldnums;
+
+#define USE_SETBUF_0 0
+
+#define NC_BUFFERED(flag) _nc_set_buffer(SP->_ofp, flag)
+
+#define NC_OUTPUT ((SP != 0) ? SP->_ofp : stdout)
+
+/*
+ * On systems with a broken linker, define 'SP' as a function to force the
+ * linker to pull in the data-only module with 'SP'.
+ */
+#if BROKEN_LINKER
+#define SP _nc_screen()
+extern NCURSES_EXPORT(SCREEN *) _nc_screen (void);
+extern NCURSES_EXPORT(int) _nc_alloc_screen (void);
+extern NCURSES_EXPORT(void) _nc_set_screen (SCREEN *);
+#else
+/* current screen is private data; avoid possible linking conflicts too */
+extern NCURSES_EXPORT_VAR(SCREEN *) SP;
+#define _nc_alloc_screen() ((SP = typeCalloc(SCREEN, 1)) != 0)
+#define _nc_set_screen(sp) SP = sp
+#endif
+
+/*
+ * We don't want to use the lines or columns capabilities internally, because
+ * if the application is running multiple screens under X, it's quite possible
+ * they could all have type xterm but have different sizes!  So...
+ */
+#define screen_lines	SP->_lines
+#define screen_columns	SP->_columns
+
+extern NCURSES_EXPORT(int) _nc_slk_initialize (WINDOW *, int);
+
+/*
+ * Some constants related to SLK's
+ */
+#define MAX_SKEY_OLD	   8	/* count of soft keys */
+#define MAX_SKEY_LEN_OLD   8	/* max length of soft key text */
+#define MAX_SKEY_PC       12    /* This is what most PC's have */
+#define MAX_SKEY_LEN_PC    5
+
+/* Macro to check whether or not we use a standard format */
+#define SLK_STDFMT(fmt) (fmt < 3)
+/* Macro to determine height of label window */
+#define SLK_LINES(fmt)  (SLK_STDFMT(fmt) ? 1 : ((fmt) - 2))
+
+#define MAX_SKEY(fmt)     (SLK_STDFMT(fmt)? MAX_SKEY_OLD : MAX_SKEY_PC)
+#define MAX_SKEY_LEN(fmt) (SLK_STDFMT(fmt)? MAX_SKEY_LEN_OLD : MAX_SKEY_LEN_PC)
+
+extern NCURSES_EXPORT(int) _nc_ripoffline (int line, int (*init)(WINDOW *,int));
+
+/*
+ * Common error messages
+ */
+#define MSG_NO_MEMORY "Out of memory"
+#define MSG_NO_INPUTS "Premature EOF"
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* CURSES_PRIV_H */