text: /****************************************************************************
   * Copyright (c) 1998-2013,2014 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                 *
   *     and: Juergen Pfeifer                                                 *
   ****************************************************************************/
  
  /*
   * $Id: curses.priv.h,v 1.546 2014/11/01 13:52:34 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
  /* *INDENT-OFF* */
  
  #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 <stddef.h>		/* for offsetof */
  #include <stdlib.h>
  #include <string.h>
  #include <sys/types.h>
  #include <sys/stat.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>
  
  #if defined __hpux
  #  ifndef EILSEQ
  #    define EILSEQ 47
  #  endif
  #endif
  
  #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
  
  /* 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
  
  #if HAVE_INTTYPES_H
  # include <inttypes.h>
  #else
  # if HAVE_STDINT_H
  #  include <stdint.h>
  # endif
  #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
  
  /* kLIBC keyboard/mouse support */
  #if defined(__OS2__) && defined(__KLIBC__)
  #define USE_KLIBC_KBD   1
  #define USE_KLIBC_MOUSE 1
  #else
  #define USE_KLIBC_KBD   0
  #define USE_KLIBC_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
  
  /*
   * When building in the MSYS2 environment, the automatic discovery of
   * the path separator in configure doesn't work properly. So, if building
   * for MinGW, we enforce the correct Windows PATH separator
   */
  #ifdef __MINGW32__
  #  ifdef NCURSES_PATHSEP
  #    undef NCURSES_PATHSEP
  #  endif
  #  define NCURSES_PATHSEP ';'
  #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
  
  /*
   * If we have va_copy(), use it for assigning va_list's.
   */
  #if defined(HAVE___VA_COPY)
  #define begin_va_copy(dst,src)	__va_copy(dst, src)
  #define end_va_copy(dst)	va_end(dst)
  #elif defined(va_copy) || defined(HAVE_VA_COPY)
  #define begin_va_copy(dst,src)	va_copy(dst, src)
  #define end_va_copy(dst)	va_end(dst)
  #else
  #define begin_va_copy(dst,src) (dst) = (src)
  #define end_va_copy(dst)	/* nothing */
  #endif
  
  /*
   * Either/both S_ISxxx and/or S_IFxxx are defined in sys/types.h; some systems
   * lack one or the other.
   */
  #ifndef S_ISDIR
  #define S_ISDIR(mode) ((mode & S_IFMT) == S_IFDIR)
  #endif
  
  #ifndef S_ISREG
  #define S_ISREG(mode) ((mode & S_IFMT) == S_IFREG)
  #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
  
  #include <nc_string.h>
  
  /*
   * Options for terminal drivers, etc...
   */
  #ifdef USE_TERM_DRIVER
  #define USE_SP_RIPOFF     1
  #define USE_SP_TERMTYPE   1
  #define USE_SP_WINDOWLIST 1
  #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
   */
  
  #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
  #undef _XPG5
  #define _nc_bkgd    _bkgd
  #define wgetbkgrnd(win, wch)	((*wch = win->_bkgd) != 0 ? OK : ERR)
  #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! */
  
  typedef struct
  {
      NCURSES_COLOR_T red, green, blue;	/* what color_content() returns */
      NCURSES_COLOR_T r, g, b;		/* params to init_color() */
      int init;			/* true if we called init_color() */
  }
  color_t;
  
  /*
   * If curses.h did not expose the SCREEN-functions, then we do not need the
   * parameter in the corresponding unextended functions.
   */
  
  #define USE_SP_FUNC_SUPPORT     NCURSES_SP_FUNCS
  #define USE_EXT_SP_FUNC_SUPPORT (NCURSES_SP_FUNCS && NCURSES_EXT_FUNCS)
  
  #if NCURSES_SP_FUNCS
  #define SP_PARM         sp	/* use parameter */
  #define NCURSES_SP_ARG          SP_PARM
  #define NCURSES_SP_DCL  SCREEN *NCURSES_SP_ARG
  #define NCURSES_SP_DCL0 NCURSES_SP_DCL
  #define NCURSES_SP_ARGx         NCURSES_SP_ARG,
  #define NCURSES_SP_DCLx SCREEN *NCURSES_SP_ARGx
  #else
  #define SP_PARM         SP	/* use global variable */
  #define NCURSES_SP_ARG
  #define NCURSES_SP_DCL
  #define NCURSES_SP_DCL0 void
  #define NCURSES_SP_ARGx
  #define NCURSES_SP_DCLx
  #endif
  
  #include <nc_panel.h>
  
  #define IsPreScreen(sp)      (((sp) != 0) && sp->_prescreen)
  #define HasTerminal(sp)      (((sp) != 0) && (0 != ((sp)->_term)))
  #define IsValidScreen(sp)    (HasTerminal(sp) && !IsPreScreen(sp))
  
  #if USE_REENTRANT
  #define CurTerm              _nc_prescreen._cur_term
  #else
  #define CurTerm              cur_term
  #endif
  
  #if NCURSES_SP_FUNCS
  #define TerminalOf(sp)       ((sp) ? ((sp)->_term ? (sp)->_term : CurTerm) : CurTerm)
  #else
  #define TerminalOf(sp)       CurTerm
  #endif
  
  #include <term.h>
  #include <nc_termios.h>
  
  /*
   * Reduce dependency on cur_term global by using terminfo data from SCREEN's
   * pointer to this data.
   */
  #ifdef USE_SP_TERMTYPE
  #undef CUR
  #endif
  
  #define SP_TERMTYPE TerminalOf(sp)->type.
  
  #include <term_entry.h>
  
  #include <nc_tparm.h>
  
  /*
   * Simplify ifdef's for the "*_ATTR" macros in case italics are not configured.
   */
  #ifdef A_ITALIC
  #define USE_ITALIC 1
  #else
  #define USE_ITALIC 0
  #define A_ITALIC 0
  #endif
  
  /*
   * Use these macros internally, to make tracing less verbose.  But leave the
   * option for compiling the tracing into the library.
   */
  #if 1
  #define ColorPair(n)		NCURSES_BITS(n, 0)
  #define PairNumber(a)		(NCURSES_CAST(int,(((unsigned long)(a) & A_COLOR) >> NCURSES_ATTR_SHIFT)))
  #else
  #define ColorPair(pair)		COLOR_PAIR(pair)
  #define PairNumber(attr)	PAIR_NUMBER(attr)
  #endif
  
  #define unColor(n)		unColor2(AttrOf(n))
  #define unColor2(a)		((a) & ALL_BUT_COLOR)
  
  /*
   * Extended-colors stores the color pair in a separate struct-member than the
   * attributes.  But for compatibility, we handle most cases where a program
   * written for non-extended colors stores the color in the attributes by
   * checking for a color pair in both places.
   */
  #if NCURSES_EXT_COLORS
  #define if_EXT_COLORS(stmt)	stmt
  #define SetPair(value,p)	SetPair2((value).ext_color, AttrOf(value), p)
  #define SetPair2(c,a,p)		c = (p), \
  				a = (unColor2(a) | (A_COLOR & (unsigned) ColorPair(oldColor(c))))
  #define GetPair(value)		GetPair2((value).ext_color, AttrOf(value))
  #define GetPair2(c,a)		((c) ? (c) : PairNumber(a))
  #define oldColor(p)		(((p) > 255) ? 255 : (p))
  #define GET_WINDOW_PAIR(w)	GetPair2((w)->_color, (w)->_attrs)
  #define SET_WINDOW_PAIR(w,p)	(w)->_color = (p)
  #define SameAttrOf(a,b)		(AttrOf(a) == AttrOf(b) && GetPair(a) == GetPair(b))
  
  #define VIDATTR(sp,attr,pair)	NCURSES_SP_NAME(vid_puts)(NCURSES_SP_ARGx attr, (short) pair, 0, NCURSES_OUTC_FUNC)
  
  #else /* !NCURSES_EXT_COLORS */
  
  #define if_EXT_COLORS(stmt)	/* nothing */
  #define SetPair(value,p)	RemAttr(value, A_COLOR), \
  				SetAttr(value, AttrOf(value) | (A_COLOR & (attr_t) ColorPair(p)))
  #define GetPair(value)		PairNumber(AttrOf(value))
  #define GET_WINDOW_PAIR(w)	PairNumber(WINDOW_ATTRS(w))
  #define SET_WINDOW_PAIR(w,p)	WINDOW_ATTRS(w) &= ALL_BUT_COLOR, \
  				WINDOW_ATTRS(w) |= (A_COLOR & (attr_t) ColorPair(p))
  #define SameAttrOf(a,b)		(AttrOf(a) == AttrOf(b))
  
  #define VIDATTR(sp,attr,pair)	NCURSES_SP_NAME(vidputs)(NCURSES_SP_ARGx attr, NCURSES_OUTC_FUNC)
  
  #endif /* NCURSES_EXT_COLORS */
  
  #define NCURSES_OUTC_FUNC       NCURSES_SP_NAME(_nc_outch)
  #define NCURSES_PUTP2(name,value)    NCURSES_SP_NAME(_nc_putp)(NCURSES_SP_ARGx name, value)
  #define NCURSES_PUTP2_FLUSH(name,value)    NCURSES_SP_NAME(_nc_putp_flush)(NCURSES_SP_ARGx name, value)
  
  #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_SP_FUNCS
  NCURSES_EXPORT(int *)        _nc_ptr_Lines (SCREEN *);
  NCURSES_EXPORT(int *)        _nc_ptr_Cols (SCREEN *);
  NCURSES_EXPORT(int *)        _nc_ptr_Tabsize (SCREEN *);
  NCURSES_EXPORT(int *)        _nc_ptr_Escdelay (SCREEN *);
  #endif
  
  #if USE_REENTRANT
  
  #define ptrLines(sp)         (sp ? &(sp->_LINES) : &(_nc_prescreen._LINES))
  #define ptrCols(sp)          (sp ? &(sp->_COLS) : &(_nc_prescreen._COLS))
  #define ptrTabsize(sp)       (sp ? &(sp->_TABSIZE) : &(_nc_prescreen._TABSIZE))
  #define ptrEscdelay(sp)      (sp ? &(sp->_ESCDELAY) : &(_nc_prescreen._ESCDELAY))
  
  #define SET_LINES(value)     *_nc_ptr_Lines(SP_PARM) = value
  #define SET_COLS(value)      *_nc_ptr_Cols(SP_PARM) = value
  #define SET_TABSIZE(value)   *_nc_ptr_Tabsize(SP_PARM) = value
  #define SET_ESCDELAY(value)  *_nc_ptr_Escdelay(SP_PARM) = value
  
  #else
  
  #define ptrLines(sp)         &LINES
  #define ptrCols(sp)          &COLS
  #define ptrTabsize(sp)       &TABSIZE
  #define ptrEscdelay(sp)      &ESCDELAY
  
  #define SET_LINES(value)     LINES = value
  #define SET_COLS(value)      COLS = value
  #define SET_TABSIZE(value)   TABSIZE = value
  #define SET_ESCDELAY(value)  ESCDELAY = 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)
  
  #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))
  #else
  #  undef USE_WEAK_SYMBOLS
  #  define USE_WEAK_SYMBOLS 0
  #endif
  #endif
  
  #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
  
  #ifdef USE_PTHREADS
  #  if USE_WEAK_SYMBOLS
  weak_symbol(pthread_sigmask);
  weak_symbol(pthread_kill);
  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 */
  
  #if USE_PTHREADS_EINTR
  #  if USE_WEAK_SYMBOLS
  #include <pthread.h>
  weak_symbol(pthread_sigmask);
  weak_symbol(pthread_kill);
  weak_symbol(pthread_self);
  weak_symbol(pthread_equal);
  extern NCURSES_EXPORT(int) _nc_sigprocmask(int, const sigset_t *, sigset_t *);
  #    undef  sigprocmask
  #    define sigprocmask _nc_sigprocmask
  #  endif
  #endif /* USE_PTHREADS_EINTR */
  
  #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 */
  
  /*
   * When using sp-funcs, locks are targeted to SCREEN-level granularity.
   * So the locking is done in the non-sp-func (which calls the sp-func) rather
   * than in the sp-func itself.
   *
   * Use the _nc_nonsp_XXX functions in the function using "NCURSES_SP_NAME()".
   * Use the _nc_sp_XXX functions in the function using "#if NCURSES_SP_FUNCS".
   */
  #if NCURSES_SP_FUNCS
  
  #define _nc_nonsp_lock_global(name)	/* nothing */
  #define _nc_nonsp_try_global(name)    0
  #define _nc_nonsp_unlock_global(name)	/* nothing */
  
  #define _nc_sp_lock_global(name)	_nc_lock_global(name)
  #define _nc_sp_try_global(name)         _nc_try_global(name)
  #define _nc_sp_unlock_global(name)	_nc_unlock_global(name)
  
  #else
  
  #define _nc_nonsp_lock_global(name)	_nc_lock_global(name)
  #define _nc_nonsp_try_global(name)      _nc_try_global(name)
  #define _nc_nonsp_unlock_global(name)	_nc_unlock_global(name)
  
  #define _nc_sp_lock_global(name)	/* nothing */
  #define _nc_sp_try_global(name)    0
  #define _nc_sp_unlock_global(name)	/* nothing */
  
  #endif
  
  #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)		(colorpair_t) ((((fg) & C_MASK) << C_SHIFT) | ((bg) & C_MASK))
  #define FORE_OF(c)		(((c) >> C_SHIFT) & C_MASK)
  #define BACK_OF(c)		((c) & C_MASK)
  #define isDefaultColor(c)	((c) >= COLOR_DEFAULT || (c) < 0)
  
  #define COLOR_DEFAULT		C_MASK
  
  #if defined(USE_BUILD_CC) || (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
  #ifdef USE_TERM_DRIVER
  	,M_TERM_DRIVER		/* Win32 console, etc */
  #endif
  } MouseType;
  
  typedef enum {
      	MF_X10 = 0		/* conventional 3-byte format */
  	, MF_SGR1006		/* xterm private mode 1006, SGR-style */
  #ifdef EXP_XTERM_1005
  	, MF_XTERM_1005		/* xterm UTF-8 private mode 1005 */
  #endif
  } MouseFormat;
  
  /*
   * Structures for scrolling.
   */
  
  typedef struct {
  	unsigned long hashval;
  	int oldcount, newcount;
  	int oldindex, newindex;
  } HASHMAP;
  
  /*
   * Structures for soft labels.
   */
  
  struct _SLK;
  
  #if !(defined(USE_TERMLIB) || defined(USE_BUILD_CC))
  
  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 {
  	bool    dirty;		/* all labels have changed */
  	bool    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>
  #if USE_WEAK_SYMBOLS
  weak_symbol(Gpm_Wgetch);
  #endif
  
  #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_PARM->_mouse_gpm_fd
  #define my_Gpm_Open     SP_PARM->_mouse_Gpm_Open
  #define my_Gpm_Close    SP_PARM->_mouse_Gpm_Close
  #define my_Gpm_GetEvent SP_PARM->_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"
  #define LEAF_LEN 1
  #else
  #define LEAF_FMT "%02x"
  #define LEAF_LEN 2
  #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 = {" /* } */
  
  #ifdef USE_TERM_DRIVER
  struct DriverTCB; /* Terminal Control Block forward declaration */
  #define INIT_TERM_DRIVER()	_nc_globals.term_driver = _nc_get_driver
  #else
  #define INIT_TERM_DRIVER()	/* nothing */
  #endif
  
  typedef struct {
      const char *name;
      char *value;
  } ITERATOR_VARS;
  
  /*
   * Global data which is not specific to a screen.
   */
  typedef struct {
  	SIG_ATOMIC_T	have_sigtstp;
  	SIG_ATOMIC_T	have_sigwinch;
  	SIG_ATOMIC_T	cleanup_nested;
  
  	bool		init_signals;
  	bool		init_screen;
  
  	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		init_keyname;
  
  	int		slk_format;
  
  	char		*safeprint_buf;
  	size_t		safeprint_used;
  
  	TGETENT_CACHE	tgetent_cache[TGETENT_MAX];
  	int		tgetent_index;
  	long		tgetent_sequence;
  
  	char		*dbd_blob;	/* string-heap for dbd_list[] */
  	char		**dbd_list;	/* distinct places to look for data */
  	int		dbd_size;	/* length of dbd_list[] */
  	time_t		dbd_time;	/* cache last updated */
  	ITERATOR_VARS	dbd_vars[dbdLAST];
  
  #ifndef USE_SP_WINDOWLIST
  	WINDOWLIST	*_nc_windowlist;
  #define WindowList(sp)	_nc_globals._nc_windowlist
  #endif
  
  #if USE_HOME_TERMINFO
  	char		*home_terminfo;
  #endif
  
  #if !USE_SAFE_SPRINTF
  	int		safeprint_cols;
  	int		safeprint_rows;
  #endif
  
  #ifdef USE_TERM_DRIVER
  	int		(*term_driver)(struct DriverTCB*, const char*, int*);
  #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;
  #if !defined(USE_PTHREADS) && USE_REENTRANT
  	int		nested_tracef;
  #endif
  #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
  #if USE_PTHREADS_EINTR
  	pthread_t	read_thread;		/* The reading thread */
  #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;
  #ifndef USE_SP_RIPOFF
  	ripoff_t	rippedoff[N_RIPS];
  	ripoff_t	*rsp;
  #endif
  	TPARM_STATE	tparm_state;
  	TTY		*saved_tty;	/* savetty/resetty information	    */
  #if NCURSES_NO_PADDING
  	bool		_no_padding;	/* flag to set if padding disabled  */
  #endif
  	NCURSES_SP_OUTC	_outch;		/* output handler if not putc */
  #if BROKEN_LINKER || USE_REENTRANT
  	chtype		*real_acs_map;
  	int		_LINES;
  	int		_COLS;
  	int		_TABSIZE;
  	int		_ESCDELAY;
  	TERMINAL	*_cur_term;
  #ifdef TRACE
  	long		_outchars;
  	const char	*_tputs_trace;
  #endif
  #endif
  	bool		use_tioctl;
  } NCURSES_PRESCREEN;
  
  /*
   * Use screen-specific ripoff data (for softkeys) rather than global.
   */
  #ifdef USE_SP_RIPOFF
  #define safe_ripoff_sp     (sp)->rsp
  #define safe_ripoff_stack  (sp)->rippedoff
  #else
  #define safe_ripoff_sp	   _nc_prescreen.rsp
  #define safe_ripoff_stack  _nc_prescreen.rippedoff
  #endif
  
  extern NCURSES_EXPORT_VAR(NCURSES_PRESCREEN) _nc_prescreen;
  
  /*
   * The SCREEN structure.
   */
  
  struct screen {
  	int		_ifd;		/* input file descriptor for screen */
  	int		_ofd;		/* output file descriptor for screen */
  	FILE		*_ofp;		/* output file ptr for screen	    */
  	char		*out_buffer;	/* output buffer		    */
  	size_t		out_limit;	/* output buffer size		    */
  	size_t		out_inuse;	/* output buffer current use	    */
  	bool		_filtered;	/* filter() was called		    */
  	bool		_prescreen;	/* is in prescreen phase	    */
  	bool		_use_env;	/* LINES & COLS from environment?   */
  	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	    */
  
  #define CurScreen(sp)  (sp)->_curscr
  #define NewScreen(sp)  (sp)->_newscr
  #define StdScreen(sp)  (sp)->_stdscr
  
  	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		     */
  	int		_pair_limit;	/* actual limit of color-pairs       */
  #if NCURSES_EXT_FUNCS
  	bool		_assumed_color; /* use assumed colors		     */
  	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	     */
  	int		_default_pairs;	/* count pairs using default color   */
  #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'	     */
  #if USE_ITALIC
  	bool		_use_ritm;	/* true if we may use 'ritm'	     */
  #endif
  
  #if USE_KLIBC_KBD
  	bool		_extended_key;	/* true if an extended key	     */
  #endif
  
  	/*
  	 * 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;
  
  	/*
  	 * 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;	/* set via mousemask() */
  	mmask_t		_mouse_mask2;	/* OR's in press/release bits */
  	mmask_t		_mouse_bstate;
  	MouseFormat	_mouse_format;	/* type of xterm mouse protocol */
  	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
  
  #ifdef USE_TERM_DRIVER
  	MEVENT		_drv_mouse_fifo[FIFO_SIZE];
  	int		_drv_mouse_head;
  	int		_drv_mouse_tail;
  	int		_drv_mouse_old_buttons;
  	int		_drv_mouse_new_buttons;
  #endif
  	/*
  	 * This supports automatic resizing
  	 */
  #if USE_SIZECHANGE
  	int		(*_resize)(NCURSES_SP_DCLx int y, int x);
  	int		(*_ungetch)(SCREEN *, 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;
  
  	NCURSES_SP_OUTC	_outch;		/* 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
  #ifdef USE_SP_WINDOWLIST
  	WINDOWLIST*	_windowlist;
  #define WindowList(sp)  (sp)->_windowlist
  #endif
  	NCURSES_OUTC	jump;
  
  	ripoff_t	rippedoff[N_RIPS];
  	ripoff_t	*rsp;
  
  	/*
  	 * 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;
  	bool		_screen_unicode;
  #endif
  
  	bool		_use_tioctl;
  };
  
  extern NCURSES_EXPORT_VAR(SCREEN *) _nc_screen_chain;
  extern NCURSES_EXPORT_VAR(SIG_ATOMIC_T) _nc_have_sigwinch;
  
  	WINDOWLIST {
  	WINDOWLIST *next;
  	SCREEN *screen;		/* screen containing the window */
  	WINDOW	win;		/* WINDOW_EXT() needs to account for offset */
  #if NCURSES_WIDECHAR
  	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(w,m) (((WINDOWLIST *)((void *)((char *)(w) - offsetof(WINDOWLIST, win))))->m)
  
  #define SP_PRE_INIT(sp)                         \
      sp->_cursrow = -1;                          \
      sp->_curscol = -1;                          \
      sp->_nl = TRUE;                             \
      sp->_raw = FALSE;                           \
      sp->_cbreak = 0;                            \
      sp->_echo = TRUE;                           \
      sp->_fifohead = -1;                         \
      sp->_endwin = TRUE;                         \
      sp->_cursor = -1;                           \
      WindowList(sp) = 0;                         \
      sp->_outch = NCURSES_OUTC_FUNC;             \
      sp->jump = 0                                \
  
  /* 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 UShort(c)	((unsigned short)(c))
  #define ChCharOf(c)	((chtype)(c) & (chtype)A_CHARTEXT)
  #define ChAttrOf(c)	((chtype)(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] = (wchar_t) (c);			    \
  			    _cp->attr = (a);					    \
  			    if_EXT_COLORS(SetPair(ch, PairNumber(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)	do { if(!isWidecExt(ch)) {				    \
  			if (Charable(ch)) {					    \
  			    NCURSES_OUTC_FUNC (NCURSES_SP_ARGx CharOf(ch)); \
  			    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 = (int) wcrtomb(PUTC_buf,		    \
  						       (ch).chars[PUTC_i], &PUT_st); \
  				if (PUTC_n <= 0) {				    \
  				    if (PUTC_ch && is8bits(PUTC_ch) && PUTC_i == 0) \
  					NCURSES_OUTC_FUNC (NCURSES_SP_ARGx CharOf(ch)); \
  				    break;					    \
  				} else {					    \
  				    int PUTC_j;					    \
  				    for (PUTC_j = 0; PUTC_j < PUTC_n; ++PUTC_j) {   \
  					NCURSES_OUTC_FUNC (NCURSES_SP_ARGx PUTC_buf[PUTC_j]); \
  				    }						    \
  				}						    \
  			    }							    \
  			    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)	(int) (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) |= (attr_t) (ext + 1)
  
  #define if_WIDEC(code)  code
  #define Charable(ch)	(((SP_PARM->_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	/* nothing */
  #define PUTC(ch)	NCURSES_OUTC_FUNC (NCURSES_SP_ARGx (int) ch)
  
  #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 = (NCURSES_SIZE_T) (col); \
  	else if ((col) < line->firstchar) \
  		line->firstchar = (NCURSES_SIZE_T) (col); \
  	else if ((col) > line->lastchar) \
  		line->lastchar = (NCURSES_SIZE_T) (col)
  
  #define CHANGED_RANGE(line,start,end) \
  	if (line->firstchar == _NOCHANGE \
  	 || line->firstchar > (start)) \
  		line->firstchar = (NCURSES_SIZE_T) (start); \
  	if (line->lastchar == _NOCHANGE \
  	 || line->lastchar < (end)) \
  		line->lastchar = (NCURSES_SIZE_T) (end)
  
  #define CHANGED_TO_EOL(line,start,end) \
  	if (line->firstchar == _NOCHANGE \
  	 || line->firstchar > (start)) \
  		line->firstchar = (NCURSES_SIZE_T) (start); \
  	line->lastchar = (NCURSES_SIZE_T) (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>
  
  /*
   * Use these for tic/infocmp malloc failures.  Generally the ncurses library
   * tries to limp along after a failure.
   */
  #define TYPE_MALLOC(type, size, name) \
  	name = typeMalloc(type, size); \
  	if (name == 0) \
  	    _nc_err_abort(MSG_NO_MEMORY)
  
  #define TYPE_REALLOC(type, size, name) \
  	name = typeRealloc(type, size, name); \
  	if (name == 0) \
  	    _nc_err_abort(MSG_NO_MEMORY)
  
  /*
   * 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(sp,p) p = WindowList(sp); p != 0; p = (p)->next
  #define each_ripoff(p) p = safe_ripoff_stack; (p - safe_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((type)(value))
  #define TRACE_RETURN1(value,dst)     return _nc_retrace_##dst(value)
  #define TRACE_RETURN2(value,dst,src) return _nc_retrace_##dst##_##src(value)
  #define TRACE_RETURN_SP(value,type)  return _nc_retrace_##type(SP_PARM, value)
  
  #define NonNull(s)	((s) != 0 ? s : "<null>")
  
  #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_RETURN1(code,cptr)
  #define returnCVoidPtr(code)	TRACE_RETURN1(code,cvoid_ptr)
  #define returnChar(code)	TRACE_RETURN(code,char)
  #define returnChtype(code)	TRACE_RETURN(code,chtype)
  #define returnCode(code)	TRACE_RETURN(code,int)
  #define returnIntAttr(code)	TRACE_RETURN2(code,int,attr_t)
  #define returnMMask(code)	TRACE_RETURN_SP(code,mmask_t)
  #define returnPtr(code)		TRACE_RETURN1(code,ptr)
  #define returnSP(code)		TRACE_RETURN1(code,sp)
  #define returnVoid		T((T_RETURN(""))); return
  #define returnVoidPtr(code)	TRACE_RETURN1(code,void_ptr)
  #define returnWin(code)		TRACE_RETURN1(code,win)
  
  extern NCURSES_EXPORT(NCURSES_BOOL)     _nc_retrace_bool (int);
  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(char)             _nc_retrace_char (int);
  extern NCURSES_EXPORT(int)              _nc_retrace_int (int);
  extern NCURSES_EXPORT(int)              _nc_retrace_int_attr_t (attr_t);
  extern NCURSES_EXPORT(mmask_t)          _nc_retrace_mmask_t (SCREEN *, mmask_t);
  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 ((char) code)
  #define returnChtype(code)	return code
  #define returnCode(code)	return code
  #define returnIntAttr(code)	return code
  #define returnMMask(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 */
  
  /*
   * Workaround for defective implementation of gcc attribute warn_unused_result
   */
  #if defined(__GNUC__) && defined(_FORTIFY_SOURCE)
  #define IGNORE_RC(func) errno = (int) func
  #else
  #define IGNORE_RC(func) (void) func
  #endif /* gcc workarounds */
  
  /*
   * 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_BOLD | A_DIM | A_BLINK | A_ITALIC)
  #define TPARM_ATTR    (A_STANDOUT | A_UNDERLINE | A_REVERSE | A_BLINK | A_DIM | A_BOLD | A_ALTCHARSET | A_INVIS | A_PROTECT)
  #define XMC_CONFLICT  (A_STANDOUT | A_UNDERLINE | A_REVERSE | A_BLINK | A_DIM | A_BOLD | A_INVIS | A_PROTECT | A_ITALIC)
  #define XMC_CHANGES(c) ((c) & SP_PARM->_xmc_suppress)
  
  #define toggle_attr_on(S,at) {\
     if (PairNumber(at) > 0) {\
        (S) = ((S) & ALL_BUT_COLOR) | (attr_t) (at);\
     } else {\
        (S) |= (attr_t) (at);\
     }\
     TR(TRACE_ATTRS, ("new attribute is %s", _traceattr((S))));}
  
  
  #define toggle_attr_off(S,at) {\
     if (PairNumber(at) > 0) {\
        (S) &= ~(at|A_COLOR);\
     } else {\
        (S) &= ~(at);\
     }\
     TR(TRACE_ATTRS, ("new attribute is %s", _traceattr((S))));}
  
  #define DelCharCost(sp,count) \
  		((parm_dch != 0) \
  		? sp->_dch_cost \
  		: ((delete_character != 0) \
  			? (sp->_dch1_cost * count) \
  			: INFINITY))
  
  #define InsCharCost(sp,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(sp,c) if (!SameAttrOf(SCREEN_ATTRS(sp), c)) { \
  				attr_t chg = AttrOf(SCREEN_ATTRS(sp)); \
  				VIDATTR(sp, 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)); \
  					NCURSES_SP_NAME(_nc_do_xmc_glitch)(NCURSES_SP_ARGx chg); \
  				} \
  			}
  #else
  #define UpdateAttrs(sp,c) if (!SameAttrOf(SCREEN_ATTRS(sp), c)) { \
  				    VIDATTR(sp, 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
  #define TWAIT_MASK (TW_ANY | TW_EVENT)
  #else
  #define EVENTLIST_0th(param) void
  #define EVENTLIST_1st(param) /* nothing */
  #define EVENTLIST_2nd(param) /* nothing */
  #define TWAIT_MASK TW_ANY
  #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(sp, count) NCURSES_SP_NAME(_nc_DelCharCost)(NCURSES_SP_ARGx count)
  
  #undef  InsCharCost
  #define InsCharCost(sp, count) NCURSES_SP_NAME(_nc_InsCharCost)(NCURSES_SP_ARGx count)
  
  extern NCURSES_EXPORT(int) NCURSES_SP_NAME(_nc_DelCharCost) (NCURSES_SP_DCLx int _c);
  extern NCURSES_EXPORT(int) NCURSES_SP_NAME(_nc_InsCharCost) (NCURSES_SP_DCLx int _c);
  
  #undef  UpdateAttrs
  #define UpdateAttrs(sp,c) NCURSES_SP_NAME(_nc_UpdateAttrs)(NCURSES_SP_ARGx CHREF(c))
  
  #if USE_WIDEC_SUPPORT || defined(NEED_NCURSES_CH_T)
  extern NCURSES_EXPORT(void) NCURSES_SP_NAME(_nc_UpdateAttrs) (NCURSES_SP_DCLx CARG_CH_T _c);
  #else
  extern NCURSES_EXPORT(void) NCURSES_SP_NAME(_nc_UpdateAttrs) (NCURSES_SP_DCLx chtype c);
  #endif
  
  #if NCURSES_SP_FUNCS
  extern NCURSES_EXPORT(int) _nc_DelCharCost (int);
  extern NCURSES_EXPORT(int) _nc_InsCharCost (int);
  extern NCURSES_EXPORT(void) _nc_UpdateAttrs (CARG_CH_T);
  #endif /* NCURSES_SP_FUNCS */
  
  #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) || defined(USE_BUILD_CC))
  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 *, int *, int EVENTLIST_2nd(_nc_eventlist *));
  
  /* lib_insch.c */
  extern NCURSES_EXPORT(int) _nc_insert_ch(SCREEN *, WINDOW *, chtype);
  
  /* lib_mvcur.c */
  #define INFINITY	1000000	/* cost: too high to use */
  
  extern NCURSES_EXPORT(int) _nc_mvcur(int yold, int xold, int ynew, int xnew);
  
  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(bool) _nc_has_mouse (SCREEN *);
  
  /* 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 *, int);
  extern NCURSES_EXPORT(void)   _nc_tinfo_cmdch(TERMINAL *, int);
  
  /* lib_set_term.c */
  extern NCURSES_EXPORT(int)    _nc_ripoffline(int, int(*)(WINDOW*, int));
  
  /* lib_setup.c */
  #define ret_error(code, fmt, arg)	if (errret) {\
  					    *errret = code;\
  					    returnCode(ERR);\
  					} else {\
  					    fprintf(stderr, fmt, arg);\
  					    exit(EXIT_FAILURE);\
  					}
  
  #define ret_error1(code, fmt, arg)	ret_error(code, "'%s': " fmt, arg)
  
  #define ret_error0(code, msg)		if (errret) {\
  					    *errret = code;\
  					    returnCode(ERR);\
  					} else {\
  					    fprintf(stderr, msg);\
  					    exit(EXIT_FAILURE);\
  					}
  
  /* lib_tstp.c */
  #if USE_SIGWINCH
  extern NCURSES_EXPORT(int) _nc_handle_sigwinch(SCREEN *);
  #else
  #define _nc_handle_sigwinch(a) /* nothing */
  #endif
  
  /* 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(SCREEN *) _nc_screen_of (WINDOW *);
  extern NCURSES_EXPORT(TERMINAL*) _nc_get_cur_term (void);
  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(char *) _nc_trace_mmask_t (SCREEN *, mmask_t);
  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 *, int);
  extern NCURSES_EXPORT(int) _nc_ospeed (int);
  extern NCURSES_EXPORT(int) _nc_outch (int);
  extern NCURSES_EXPORT(int) _nc_putchar (int);
  extern NCURSES_EXPORT(int) _nc_putp(const char *, const char *);
  extern NCURSES_EXPORT(int) _nc_putp_flush(const char *, const char *);
  extern NCURSES_EXPORT(int) _nc_read_termcap_entry (const char *const, TERMTYPE *const);
  extern NCURSES_EXPORT(int) _nc_setup_tinfo(const char *, TERMTYPE *);
  extern NCURSES_EXPORT(int) _nc_setupscreen (int, int, FILE *, int, int);
  extern NCURSES_EXPORT(int) _nc_timed_wait (SCREEN *, int, int, int * EVENTLIST_2nd(_nc_eventlist *));
  extern NCURSES_EXPORT(void) _nc_do_color (int, int, int, NCURSES_OUTC);
  extern NCURSES_EXPORT(void) _nc_flush (void);
  extern NCURSES_EXPORT(void) _nc_free_and_exit (int) GCC_NORETURN;
  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 *, int);
  extern NCURSES_EXPORT(void) _nc_setenv_num (const char *, int);
  extern NCURSES_EXPORT(void) _nc_signal_handler (int);
  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_error_leaks(void);
  extern NCURSES_EXPORT(void) _nc_comp_scan_leaks(void);
  extern NCURSES_EXPORT(void) _nc_db_iterator_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
  
  #if !(defined(USE_TERMLIB) || defined(USE_BUILD_CC))
  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, int const, int const, NCURSES_CH_T);
  #endif
  
  #if USE_WIDEC_SUPPORT
  extern NCURSES_EXPORT(int) _nc_insert_wch(WINDOW *, const cchar_t *);
  #endif
  
  #if USE_WIDEC_SUPPORT && !(defined(USE_TERMLIB) || defined(USE_BUILD_CC))
  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
  
  /*
   * Wide-character macros to hide some platform-differences.
   */
  #if USE_WIDEC_SUPPORT
  
  #if defined(__MINGW32__)
  /*
   * MinGW has wide-character functions, but they do not work correctly.
   */
  
  extern int __MINGW_NOTHROW _nc_wctomb(char *, wchar_t);
  #define wctomb(s,wc) _nc_wctomb(s,wc)
  #define wcrtomb(s,wc,n) _nc_wctomb(s,wc)
  
  extern int __MINGW_NOTHROW _nc_mbtowc(wchar_t *, const char *, size_t);
  #define mbtowc(pwc,s,n) _nc_mbtowc(pwc,s,n)
  
  extern int __MINGW_NOTHROW _nc_mblen(const char *, size_t);
  #define mblen(s,n) _nc_mblen(s, n)
  
  #endif /* __MINGW32__ */
  
  #if HAVE_MBTOWC && HAVE_MBLEN
  #define reset_mbytes(state) IGNORE_RC(mblen(NULL, (size_t) 0)), IGNORE_RC(mbtowc(NULL, NULL, (size_t) 0))
  #define count_mbytes(buffer,length,state) mblen(buffer,length)
  #define check_mbytes(wch,buffer,length,state) \
  	(int) mbtowc(&wch, buffer, length)
  #define state_unused
  #elif HAVE_MBRTOWC && HAVE_MBRLEN
  #define reset_mbytes(state) init_mb(state)
  #define count_mbytes(buffer,length,state) mbrlen(buffer,length,&state)
  #define check_mbytes(wch,buffer,length,state) \
  	(int) mbrtowc(&wch, buffer, length, &state)
  #else
  make an error
  #endif
  
  #endif /* USE_WIDEC_SUPPORT */
  
  /*
   * 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_OUTPUT(sp) ((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'.
   */
  #define _nc_alloc_screen_sp() typeCalloc(SCREEN, 1)
  
  #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 *);
  #define CURRENT_SCREEN          _nc_screen()
  #else
  /* current screen is private data; avoid possible linking conflicts too */
  extern NCURSES_EXPORT_VAR(SCREEN *) SP;
  #define CURRENT_SCREEN SP
  #define _nc_alloc_screen()      ((SP = _nc_alloc_screen_sp()) != 0)
  #define _nc_set_screen(sp)      SP = sp
  #endif
  
  #if NCURSES_SP_FUNCS
  #define CURRENT_SCREEN_PRE      (IsPreScreen(CURRENT_SCREEN) ? CURRENT_SCREEN : new_prescr())
  #else
  #define CURRENT_SCREEN_PRE      CURRENT_SCREEN
  #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)        (sp)->_lines
  #define screen_columns(sp)      (sp)->_columns
  
  extern NCURSES_EXPORT(int) _nc_slk_initialize (WINDOW *, int);
  extern NCURSES_EXPORT(int) _nc_format_slks (NCURSES_SP_DCLx int _c);
  
  /*
   * 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)
  
  /*
   * Common error messages
   */
  #define MSG_NO_MEMORY "Out of memory"
  #define MSG_NO_INPUTS "Premature EOF"
  
  extern NCURSES_EXPORT(int) _nc_set_tty_mode(TTY *);
  extern NCURSES_EXPORT(int) _nc_get_tty_mode(TTY *);
  
  /* timed_wait flag definitions */
  #define TW_NONE    0
  #define TW_INPUT   1
  #define TW_MOUSE   2
  #define TW_ANY     (TW_INPUT | TW_MOUSE)
  #define TW_EVENT   4
  
  #define SetSafeOutcWrapper(outc)	    \
      SCREEN* sp = CURRENT_SCREEN;            \
      struct screen outc_wrapper;		    \
      if (sp==0) {                            \
  	sp = &outc_wrapper;                 \
  	memset(sp,0,sizeof(struct screen)); \
  	sp->_outch = _nc_outc_wrapper;      \
      }\
      sp->jump = outc
  
  #ifdef USE_TERM_DRIVER
  
  typedef struct _termInfo
  {
      bool caninit;
  
      bool hascolor;
      bool initcolor;
      bool canchange;
  
      int  tabsize;
  
      int  maxcolors;
      int  maxpairs;
      int  nocolorvideo;
  
      int  numbuttons;
      int  numlabels;
      int  labelwidth;
      int  labelheight;
  
      const color_t* defaultPalette;
  } TerminalInfo;
  
  typedef struct term_driver {
      bool   isTerminfo;
      const char* (*td_name)(struct DriverTCB*);
      bool   (*td_CanHandle)(struct DriverTCB*, const char*, int*);
      void   (*td_init)(struct DriverTCB*);
      void   (*td_release)(struct DriverTCB*);
      int    (*td_size)(struct DriverTCB*, int* Line, int *Cols);
      int    (*td_sgmode)(struct DriverTCB*, int setFlag, TTY*);
      chtype (*td_conattr)(struct DriverTCB*);
      int    (*td_hwcur)(struct DriverTCB*, int yold, int xold, int y, int x);
      int    (*td_mode)(struct DriverTCB*, int progFlag, int defFlag);
      bool   (*td_rescol)(struct DriverTCB*);
      bool   (*td_rescolors)(struct DriverTCB*);
      void   (*td_color)(struct DriverTCB*, int fore, int color, int(*)(SCREEN*, int));
      int    (*td_doBeepOrFlash)(struct DriverTCB*, int);
      void   (*td_initpair)(struct DriverTCB*, int, int, int);
      void   (*td_initcolor)(struct DriverTCB*, int, int, int, int);
      void   (*td_docolor)(struct DriverTCB*, int, int, int, int(*)(SCREEN*, int));
      void   (*td_initmouse)(struct DriverTCB*);
      int    (*td_testmouse)(struct DriverTCB*, int EVENTLIST_2nd(_nc_eventlist*));
      void   (*td_setfilter)(struct DriverTCB*);
      void   (*td_hwlabel)(struct DriverTCB*, int, char*);
      void   (*td_hwlabelOnOff)(struct DriverTCB*, int);
      int    (*td_update)(struct DriverTCB*);
      int    (*td_defaultcolors)(struct DriverTCB*, int, int);
      int    (*td_print)(struct DriverTCB*, char*, int);
      int    (*td_getsize)(struct DriverTCB*, int*, int*);
      int    (*td_setsize)(struct DriverTCB*, int, int);
      void   (*td_initacs)(struct DriverTCB*, chtype*, chtype*);
      void   (*td_scinit)(SCREEN *);
      void   (*td_scexit)(SCREEN *);
      int    (*td_twait)(struct DriverTCB*, int, int, int* EVENTLIST_2nd(_nc_eventlist*));
      int    (*td_read)(struct DriverTCB*, int*);
      int    (*td_nap)(struct DriverTCB*, int);
      int    (*td_kpad)(struct DriverTCB*, int);
      int    (*td_kyOk)(struct DriverTCB*, int, int);
      bool   (*td_kyExist)(struct DriverTCB*, int);
      int    (*td_cursorSet)(struct DriverTCB*, int);
  } TERM_DRIVER;
  
  typedef struct DriverTCB
  {
      TERMINAL      term;   /* needs to be the first Element !!! */
      TERM_DRIVER*  drv;    /* The driver for that Terminal */
      SCREEN*       csp;    /* The screen that owns that Terminal */
      TerminalInfo  info;   /* Driver independent core capabilities of the Terminal */
      void*         prop;   /* Driver dependent property storage to be used by the Driver */
      long          magic;
  } TERMINAL_CONTROL_BLOCK;
  
  #define NCDRV_MAGIC(id) (0x47110000 | (id&0xffff))
  #define NCDRV_TINFO      0x01
  #define NCDRV_WINCONSOLE 0x02
  
  #define TCBOf(sp)    ((TERMINAL_CONTROL_BLOCK*)(TerminalOf(sp)))
  #define InfoOf(sp)   TCBOf(sp)->info
  #define CallDriver(sp,method)                        TCBOf(sp)->drv->method(TCBOf(sp))
  #define CallDriver_1(sp,method,arg1)                 TCBOf(sp)->drv->method(TCBOf(sp),arg1)
  #define CallDriver_2(sp,method,arg1,arg2)            TCBOf(sp)->drv->method(TCBOf(sp),arg1,arg2)
  #define CallDriver_3(sp,method,arg1,arg2,arg3)       TCBOf(sp)->drv->method(TCBOf(sp),arg1,arg2,arg3)
  #define CallDriver_4(sp,method,arg1,arg2,arg3,arg4)  TCBOf(sp)->drv->method(TCBOf(sp),arg1,arg2,arg3,arg4)
  
  extern NCURSES_EXPORT_VAR(const color_t*) _nc_cga_palette;
  extern NCURSES_EXPORT_VAR(const color_t*) _nc_hls_palette;
  
  extern NCURSES_EXPORT(int)      _nc_get_driver(TERMINAL_CONTROL_BLOCK*, const char*, int*);
  extern NCURSES_EXPORT(void)     _nc_get_screensize_ex(SCREEN *, TERMINAL *, int *, int *);
  #endif /* USE_TERM_DRIVER */
  
  /*
   * Entrypoints which are actually provided in the terminal driver, which would
   * be an sp-name otherwise.
   */
  #ifdef USE_TERM_DRIVER
  #define TINFO_HAS_KEY           _nc_tinfo_has_key
  #define TINFO_DOUPDATE          _nc_tinfo_doupdate
  #define TINFO_MVCUR             _nc_tinfo_mvcur
  extern NCURSES_EXPORT(int)      TINFO_HAS_KEY(SCREEN*, int);
  extern NCURSES_EXPORT(int)      TINFO_DOUPDATE(SCREEN *);
  extern NCURSES_EXPORT(int)      TINFO_MVCUR(SCREEN*, int, int, int, int);
  #else
  #define TINFO_HAS_KEY           NCURSES_SP_NAME(has_key)
  #define TINFO_DOUPDATE          NCURSES_SP_NAME(doupdate)
  #define TINFO_MVCUR             NCURSES_SP_NAME(_nc_mvcur)
  #endif
  
  /*
   * Entrypoints using an extra parameter with the terminal driver.
   */
  #ifdef USE_TERM_DRIVER
  extern NCURSES_EXPORT(void)   _nc_get_screensize(SCREEN *, TERMINAL *, int *, int *);
  extern NCURSES_EXPORT(int)    _nc_setupterm_ex(TERMINAL **, NCURSES_CONST char *, int , int *, int);
  #define TINFO_GET_SIZE(sp, tp, lp, cp) \
  	_nc_get_screensize(sp, tp, lp, cp)
  #define TINFO_SET_CURTERM(sp, tp) \
  	NCURSES_SP_NAME(set_curterm)(sp, tp)
  #define TINFO_SETUP_TERM(tpp, name, fd, err, reuse) \
  	_nc_setupterm_ex(tpp, name, fd, err, reuse)
  #else /* !USE_TERM_DRIVER */
  extern NCURSES_EXPORT(void)   _nc_get_screensize(SCREEN *, int *, int *);
  #define TINFO_GET_SIZE(sp, tp, lp, cp) \
  	_nc_get_screensize(sp, lp, cp)
  #define TINFO_SET_CURTERM(sp, tp) \
  	set_curterm(tp)
  #define TINFO_SETUP_TERM(tpp, name, fd, err, reuse) \
  	_nc_setupterm(name, fd, err, reuse)
  #endif /* !USE_TERM_DRIVER */
  
  #ifdef USE_TERM_DRIVER
  #if defined(USE_WIN32CON_DRIVER)
  #include <nc_mingw.h>
  extern NCURSES_EXPORT_VAR(TERM_DRIVER) _nc_WIN_DRIVER;
  extern NCURSES_EXPORT(int)  _nc_mingw_isatty(int fd);
  extern NCURSES_EXPORT(int)  _nc_mingw_isconsole(int fd);
  extern NCURSES_EXPORT(int) _nc_mingw_console_read(
      SCREEN *sp,
      HANDLE  fd,
      int *buf);
  extern NCURSES_EXPORT(int) _nc_mingw_testmouse(
      SCREEN * sp,
      HANDLE fd,
      int delay);
  #else
  #endif
  extern NCURSES_EXPORT_VAR(TERM_DRIVER) _nc_TINFO_DRIVER;
  #endif
  
  #if defined(USE_TERM_DRIVER) && defined(USE_WIN32CON_DRIVER)
  #define NC_ISATTY(fd) _nc_mingw_isatty(fd)
  #else
  #define NC_ISATTY(fd) isatty(fd)
  #endif
  
  #ifdef USE_TERM_DRIVER
  #  define IsTermInfo(sp)       ((TCBOf(sp) != 0) && ((TCBOf(sp)->drv->isTerminfo)))
  #  define HasTInfoTerminal(sp) ((0 != TerminalOf(sp)) && IsTermInfo(sp))
  #  if defined(USE_WIN32CON_DRIVER)
  #    define IsTermInfoOnConsole(sp) (IsTermInfo(sp)&&_nc_mingw_isconsole(TerminalOf(sp)->Filedes))
  #else
  #    define IsTermInfoOnConsole(sp) FALSE
  #  endif
  #else
  #  define IsTermInfo(sp)       TRUE
  #  define HasTInfoTerminal(sp) (0 != TerminalOf(sp))
  #  define IsTermInfoOnConsole(sp) FALSE
  #endif
  
  #define IsValidTIScreen(sp)  (HasTInfoTerminal(sp))
  
  /*
   * Exported entrypoints beyond the published API
   */
  #if NCURSES_SP_FUNCS
  extern NCURSES_EXPORT(WINDOW *) _nc_curscr_of(SCREEN*);
  extern NCURSES_EXPORT(WINDOW *) _nc_newscr_of(SCREEN*);
  extern NCURSES_EXPORT(WINDOW *) _nc_stdscr_of(SCREEN*);
  extern NCURSES_EXPORT(int)      _nc_outc_wrapper(SCREEN*,int);
  
  #if USE_REENTRANT
  extern NCURSES_EXPORT(int)       NCURSES_SP_NAME(_nc_TABSIZE)(SCREEN*);
  extern NCURSES_EXPORT(char *)    NCURSES_SP_NAME(longname)(SCREEN*);
  #endif
  
  #if NCURSES_EXT_FUNCS
  extern NCURSES_EXPORT(int)      NCURSES_SP_NAME(_nc_set_tabsize)(SCREEN*, int);
  #endif
  
  /*
   * We put the safe versions of various calls here as they are not published
   * part of the API up to now
   */
  extern NCURSES_EXPORT(TERMINAL*) NCURSES_SP_NAME(_nc_get_cur_term) (SCREEN *sp);
  extern NCURSES_EXPORT(WINDOW *) NCURSES_SP_NAME(_nc_makenew) (SCREEN*, int, int, int, int, int);
  extern NCURSES_EXPORT(bool)     NCURSES_SP_NAME(_nc_reset_colors)(SCREEN*);
  extern NCURSES_EXPORT(char *)   NCURSES_SP_NAME(_nc_printf_string)(SCREEN*, const char *, va_list);
  extern NCURSES_EXPORT(chtype)   NCURSES_SP_NAME(_nc_acs_char)(SCREEN*,int);
  extern NCURSES_EXPORT(int)      NCURSES_SP_NAME(_nc_curs_set)(SCREEN*,int);
  extern NCURSES_EXPORT(int)      NCURSES_SP_NAME(_nc_get_tty_mode)(SCREEN*,TTY*);
  extern NCURSES_EXPORT(int)      NCURSES_SP_NAME(_nc_mcprint)(SCREEN*,char*, int);
  extern NCURSES_EXPORT(int)      NCURSES_SP_NAME(_nc_msec_cost)(SCREEN*, const char *, int);
  extern NCURSES_EXPORT(int)      NCURSES_SP_NAME(_nc_mvcur)(SCREEN*, int, int, int, int);
  extern NCURSES_EXPORT(int)      NCURSES_SP_NAME(_nc_outch)(SCREEN*, int);
  extern NCURSES_EXPORT(int)      NCURSES_SP_NAME(_nc_putchar)(SCREEN*, int);
  extern NCURSES_EXPORT(int)      NCURSES_SP_NAME(_nc_putp)(SCREEN*, const char *, const char*);
  extern NCURSES_EXPORT(int)      NCURSES_SP_NAME(_nc_putp_flush)(SCREEN*, const char *, const char *);
  extern NCURSES_EXPORT(int)      NCURSES_SP_NAME(_nc_resetty)(SCREEN*);
  extern NCURSES_EXPORT(int)      NCURSES_SP_NAME(_nc_resize_term)(SCREEN*,int,int);
  extern NCURSES_EXPORT(int)      NCURSES_SP_NAME(_nc_ripoffline)(SCREEN*, int, int (*)(WINDOW *,int));
  extern NCURSES_EXPORT(int)      NCURSES_SP_NAME(_nc_savetty)(SCREEN*);
  extern NCURSES_EXPORT(int)      NCURSES_SP_NAME(_nc_scr_init)(SCREEN*,const char*);
  extern NCURSES_EXPORT(int)      NCURSES_SP_NAME(_nc_scr_restore)(SCREEN*, const char*);
  extern NCURSES_EXPORT(int)      NCURSES_SP_NAME(_nc_scrolln)(SCREEN*, int, int, int, int);
  extern NCURSES_EXPORT(int)      NCURSES_SP_NAME(_nc_set_tty_mode)(SCREEN*, TTY*);
  extern NCURSES_EXPORT(int)      NCURSES_SP_NAME(_nc_setupscreen)(SCREEN**, int, int, FILE *, int, int);
  extern NCURSES_EXPORT(int)      NCURSES_SP_NAME(_nc_tgetent)(SCREEN*,char*,const char *);
  extern NCURSES_EXPORT(int)      NCURSES_SP_NAME(_nc_tigetnum)(SCREEN*,NCURSES_CONST char*);
  extern NCURSES_EXPORT(int)      NCURSES_SP_NAME(_nc_vid_attr)(SCREEN *, attr_t, NCURSES_COLOR_T, void *);
  extern NCURSES_EXPORT(int)      NCURSES_SP_NAME(_nc_vidputs)(SCREEN*,chtype,int(*) (SCREEN*, int));
  extern NCURSES_EXPORT(void)     NCURSES_SP_NAME(_nc_do_color)(SCREEN*, int, int, int, NCURSES_SP_OUTC);
  extern NCURSES_EXPORT(void)     NCURSES_SP_NAME(_nc_do_xmc_glitch)(SCREEN*, attr_t);
  extern NCURSES_EXPORT(void)     NCURSES_SP_NAME(_nc_flush)(SCREEN*);
  extern NCURSES_EXPORT(void)     NCURSES_SP_NAME(_nc_free_and_exit)(SCREEN*, int) GCC_NORETURN;
  extern NCURSES_EXPORT(void)     NCURSES_SP_NAME(_nc_freeall)(SCREEN*);
  extern NCURSES_EXPORT(void)     NCURSES_SP_NAME(_nc_hash_map)(SCREEN*);
  extern NCURSES_EXPORT(void)     NCURSES_SP_NAME(_nc_init_acs)(SCREEN*);
  extern NCURSES_EXPORT(void)     NCURSES_SP_NAME(_nc_make_oldhash)(SCREEN*, int i);
  extern NCURSES_EXPORT(void)     NCURSES_SP_NAME(_nc_mvcur_init)(SCREEN*);
  extern NCURSES_EXPORT(void)     NCURSES_SP_NAME(_nc_mvcur_resume)(SCREEN*);
  extern NCURSES_EXPORT(void)     NCURSES_SP_NAME(_nc_mvcur_wrap)(SCREEN*);
  extern NCURSES_EXPORT(void)     NCURSES_SP_NAME(_nc_screen_init)(SCREEN*);
  extern NCURSES_EXPORT(void)     NCURSES_SP_NAME(_nc_screen_resume)(SCREEN*);
  extern NCURSES_EXPORT(void)     NCURSES_SP_NAME(_nc_screen_wrap)(SCREEN*);
  extern NCURSES_EXPORT(void)     NCURSES_SP_NAME(_nc_scroll_oldhash)(SCREEN*, int n, int top, int bot);
  extern NCURSES_EXPORT(void)     NCURSES_SP_NAME(_nc_scroll_optimize)(SCREEN*);
  extern NCURSES_EXPORT(void)     NCURSES_SP_NAME(_nc_set_buffer)(SCREEN*, FILE *, int);
  
  extern NCURSES_EXPORT(void)     _nc_cookie_init(SCREEN *sp);
  
  #if defined(TRACE) || defined(SCROLLDEBUG) || defined(HASHDEBUG)
  extern NCURSES_EXPORT(void)     NCURSES_SP_NAME(_nc_linedump)(SCREEN*);
  #endif
  
  #if USE_WIDEC_SUPPORT
  extern NCURSES_EXPORT(wchar_t *) NCURSES_SP_NAME(_nc_wunctrl)(SCREEN*, cchar_t *);
  #endif
  
  #endif /* NCURSES_SP_FUNCS */
  
  #if NCURSES_SP_FUNCS
  
  #define safe_keyname NCURSES_SP_NAME(keyname)
  #define safe_unctrl  NCURSES_SP_NAME(unctrl)
  #define safe_ungetch NCURSES_SP_NAME(ungetch)
  
  #else
  
  #define safe_keyname _nc_keyname
  #define safe_unctrl  _nc_unctrl
  #define safe_ungetch _nc_ungetch
  
  extern NCURSES_EXPORT(NCURSES_CONST char *) _nc_keyname (SCREEN *, int);
  extern NCURSES_EXPORT(int) _nc_ungetch (SCREEN *, int);
  extern NCURSES_EXPORT(NCURSES_CONST char *) _nc_unctrl (SCREEN *, chtype);
  
  #endif
  
  #ifdef EXP_XTERM_1005
  NCURSES_EXPORT(int) _nc_conv_to_utf8(unsigned char *, unsigned, unsigned);
  NCURSES_EXPORT(int) _nc_conv_to_utf32(unsigned *, const char *, unsigned);
  #endif
  
  #ifdef __cplusplus
  }
  #endif
  
  /* *INDENT-ON* */
  
  #endif /* CURSES_PRIV_H */
  