xref: /openbsd-src/lib/libcurses/curses.priv.h (revision 852c4eda9a667a259e9fed88dd1f9d35330b27e1)
1 /*	$OpenBSD: curses.priv.h,v 1.28 2000/07/10 03:06:10 millert Exp $	*/
2 
3 /****************************************************************************
4  * Copyright (c) 1998,1999,2000 Free Software Foundation, Inc.              *
5  *                                                                          *
6  * Permission is hereby granted, free of charge, to any person obtaining a  *
7  * copy of this software and associated documentation files (the            *
8  * "Software"), to deal in the Software without restriction, including      *
9  * without limitation the rights to use, copy, modify, merge, publish,      *
10  * distribute, distribute with modifications, sublicense, and/or sell       *
11  * copies of the Software, and to permit persons to whom the Software is    *
12  * furnished to do so, subject to the following conditions:                 *
13  *                                                                          *
14  * The above copyright notice and this permission notice shall be included  *
15  * in all copies or substantial portions of the Software.                   *
16  *                                                                          *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
20  * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
21  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
22  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
23  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
24  *                                                                          *
25  * Except as contained in this notice, the name(s) of the above copyright   *
26  * holders shall not be used in advertising or otherwise to promote the     *
27  * sale, use or other dealings in this Software without prior written       *
28  * authorization.                                                           *
29  ****************************************************************************/
30 
31 /****************************************************************************
32  *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
33  *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
34  ****************************************************************************/
35 
36 
37 /*
38  * $From: curses.priv.h,v 1.162 2000/06/24 21:06:10 tom Exp $
39  *
40  *	curses.priv.h
41  *
42  *	Header file for curses library objects which are private to
43  *	the library.
44  *
45  */
46 
47 #ifndef CURSES_PRIV_H
48 #define CURSES_PRIV_H 1
49 
50 #ifdef __cplusplus
51 extern "C" {
52 #endif
53 
54 #include <ncurses_cfg.h>
55 
56 #if USE_RCS_IDS
57 #define MODULE_ID(id) static const char Ident[] = id;
58 #else
59 #define MODULE_ID(id) /*nothing*/
60 #endif
61 
62 #include <stdlib.h>
63 #include <string.h>
64 #include <sys/types.h>
65 
66 #if HAVE_UNISTD_H
67 #include <unistd.h>
68 #endif
69 
70 #if HAVE_SYS_BSDTYPES_H
71 #include <sys/bsdtypes.h>	/* needed for ISC */
72 #endif
73 
74 #if HAVE_LIMITS_H
75 # include <limits.h>
76 #elif HAVE_SYS_PARAM_H
77 # include <sys/param.h>
78 #endif
79 
80 #ifndef PATH_MAX
81 # if defined(_POSIX_PATH_MAX)
82 #  define PATH_MAX _POSIX_PATH_MAX
83 # elif defined(MAXPATHLEN)
84 #  define PATH_MAX MAXPATHLEN
85 # else
86 #  define PATH_MAX 255	/* the Posix minimum path-size */
87 # endif
88 #endif
89 
90 #include <assert.h>
91 #include <stdio.h>
92 
93 #include <errno.h>
94 
95 #if DECL_ERRNO
96 extern int errno;
97 #endif
98 
99 #include <nc_panel.h>
100 
101 /* Some systems have a broken 'select()', but workable 'poll()'.  Use that */
102 #if HAVE_WORKING_POLL
103 #define USE_FUNC_POLL 1
104 #ifdef HAVE_POLL_H
105 #include <poll.h>
106 #else
107 #include <sys/poll.h>
108 #endif
109 #else
110 #define USE_FUNC_POLL 0
111 #endif
112 
113 /* Alessandro Rubini's GPM (general-purpose mouse) */
114 #if HAVE_LIBGPM && HAVE_GPM_H
115 #define USE_GPM_SUPPORT 1
116 #else
117 #define USE_GPM_SUPPORT 0
118 #endif
119 
120 /* QNX mouse support */
121 #if defined(__QNX__) && !defined(__QNXNTO__)
122 #define USE_QNX_MOUSE 1
123 #else
124 #define USE_QNX_MOUSE 0
125 #endif
126 
127 /* EMX mouse support */
128 #ifdef __EMX__
129 #define USE_EMX_MOUSE
130 #endif
131 
132 #define DEFAULT_MAXCLICK 166
133 #define EV_MAX		8	/* size of mouse circular event queue */
134 
135 /*
136  * If we don't have signals to support it, don't add a sigwinch handler.
137  * In any case, resizing is an extended feature.  Use it if we've got it.
138  */
139 #ifndef NCURSES_EXT_FUNCS
140 #undef HAVE_SIZECHANGE
141 #endif
142 
143 #if HAVE_SIZECHANGE
144 #define USE_SIZECHANGE 1
145 #else
146 #undef USE_SIGWINCH
147 #endif
148 
149 /*
150  * Not all platforms have memmove; some have an equivalent bcopy.  (Some may
151  * have neither).
152  */
153 #if USE_OK_BCOPY
154 #define memmove(d,s,n) bcopy(s,d,n)
155 #elif USE_MY_MEMMOVE
156 #define memmove(d,s,n) _nc_memmove(d,s,n)
157 extern void * _nc_memmove(void *, const void *, size_t);
158 #endif
159 
160 /*
161  * Scroll hints are useless when hashmap is used
162  */
163 #if !USE_SCROLL_HINTS
164 #if !USE_HASHMAP
165 #define USE_SCROLL_HINTS 1
166 #else
167 #define USE_SCROLL_HINTS 0
168 #endif
169 #endif
170 
171 #if USE_SCROLL_HINTS
172 #define if_USE_SCROLL_HINTS(stmt) stmt
173 #else
174 #define if_USE_SCROLL_HINTS(stmt) /*nothing*/
175 #endif
176 
177 /*
178  * Note:  ht/cbt expansion flakes out randomly under Linux 1.1.47, but only
179  * when we're throwing control codes at the screen at high volume.  To see
180  * this, re-enable USE_HARD_TABS and run worm for a while.  Other systems
181  * probably don't want to define this either due to uncertainties about tab
182  * delays and expansion in raw mode.
183  */
184 
185 struct tries {
186 	struct tries    *child;     /* ptr to child.  NULL if none          */
187 	struct tries    *sibling;   /* ptr to sibling.  NULL if none        */
188 	unsigned char    ch;        /* character at this node               */
189 	unsigned short   value;     /* code of string so far.  0 if none.   */
190 };
191 
192 /*
193  * Definitions for color pairs
194  */
195 #define C_SHIFT 8		/* we need more bits than there are colors */
196 #define C_MASK  ((1 << C_SHIFT) - 1)
197 
198 #define PAIR_OF(fg, bg) ((((fg) & C_MASK) << C_SHIFT) | ((bg) & C_MASK))
199 
200 /*
201  * Common/troublesome character definitions
202  */
203 #define L_BRACE '{'
204 #define R_BRACE '}'
205 #define S_QUOTE '\''
206 
207 /*
208  * Structure for palette tables
209  */
210 
211 typedef struct
212 {
213     short red, green, blue;
214 }
215 color_t;
216 
217 #define MAXCOLUMNS    135
218 #define MAXLINES      66
219 #define FIFO_SIZE     MAXCOLUMNS+2  /* for nocbreak mode input */
220 
221 #define ACS_LEN       128
222 
223 #define WINDOWLIST struct _win_list
224 
225 #include <curses.h>	/* we'll use -Ipath directive to get the right one! */
226 
227 /*
228  * Structure for soft labels.
229  */
230 
231 typedef struct
232 {
233 	char *text;             /* text for the label */
234 	char *form_text;        /* formatted text (left/center/...) */
235 	int x;                  /* x coordinate of this field */
236 	char dirty;             /* this label has changed */
237 	char visible;           /* field is visible */
238 } slk_ent;
239 
240 typedef struct {
241 	char dirty;             /* all labels have changed */
242 	char hidden;            /* soft labels are hidden */
243 	struct _win_st *win;
244 	slk_ent *ent;
245 	char*  buffer;           /* buffer for labels */
246 	short  maxlab;           /* number of available labels */
247 	short  labcnt;           /* number of allocated labels */
248 	short  maxlen;           /* length of labels */
249         chtype attr;             /* soft label attribute */
250 } SLK;
251 
252 struct screen {
253 	int             _ifd;           /* input file ptr for screen        */
254 	FILE            *_ofp;          /* output file ptr for screen       */
255 	char            *_setbuf;       /* buffered I/O for output          */
256 	int		_buffered;      /* setvbuf uses _setbuf data        */
257 	int             _checkfd;       /* filedesc for typeahead check     */
258 	struct term     *_term;         /* terminal type information        */
259 	short           _lines;         /* screen lines                     */
260 	short           _columns;       /* screen columns                   */
261 	short           _lines_avail;   /* lines available for stdscr       */
262 	short           _topstolen;     /* lines stolen from top            */
263 
264 	WINDOW          *_curscr;       /* current screen                   */
265 	WINDOW          *_newscr;       /* virtual screen to be updated to  */
266 	WINDOW          *_stdscr;       /* screen's full-window context     */
267 
268 	struct tries    *_keytry;       /* "Try" for use with keypad mode   */
269 	struct tries    *_key_ok;       /* Disabled keys via keyok(,FALSE)  */
270 	int             _tried;         /* keypad mode was initialized      */
271 
272 	unsigned int    _fifo[FIFO_SIZE];       /* input push-back buffer   */
273 	short           _fifohead,      /* head of fifo queue               */
274 	                _fifotail,      /* tail of fifo queue               */
275 	                _fifopeek,      /* where to peek for next char      */
276 	                _fifohold;      /* set if breakout marked           */
277 
278 	int             _endwin;        /* are we out of window mode?       */
279 	unsigned long   _current_attr;  /* terminal attribute current set   */
280 	int             _coloron;       /* is color enabled?                */
281 	int             _cursor;        /* visibility of the cursor         */
282 	int             _cursrow;       /* physical cursor row              */
283 	int             _curscol;       /* physical cursor column           */
284 	int             _nl;            /* True if NL -> CR/NL is on        */
285 	int             _raw;           /* True if in raw mode              */
286 	int             _cbreak;        /* 1 if in cbreak mode              */
287 	                                /* > 1 if in halfdelay mode         */
288 	int             _echo;          /* True if echo on                  */
289 	int             _use_meta;      /* use the meta key?                */
290 	SLK             *_slk;          /* ptr to soft key struct / NULL    */
291         int             slk_format;     /* selected format for this screen  */
292 	/* cursor movement costs; units are 10ths of milliseconds */
293 #ifdef NCURSES_NO_PADDING
294 	int             _no_padding;    /* flag to set if padding disabled  */
295 #endif
296 	int             _char_padding;  /* cost of character put            */
297 	int             _cr_cost;       /* cost of (carriage_return)        */
298 	int             _cup_cost;      /* cost of (cursor_address)         */
299 	int             _home_cost;     /* cost of (cursor_home)            */
300 	int             _ll_cost;       /* cost of (cursor_to_ll)           */
301 #if USE_HARD_TABS
302 	int             _ht_cost;       /* cost of (tab)                    */
303 	int             _cbt_cost;      /* cost of (backtab)                */
304 #endif /* USE_HARD_TABS */
305 	int             _cub1_cost;     /* cost of (cursor_left)            */
306 	int             _cuf1_cost;     /* cost of (cursor_right)           */
307 	int             _cud1_cost;     /* cost of (cursor_down)            */
308 	int             _cuu1_cost;     /* cost of (cursor_up)              */
309 	int             _cub_cost;      /* cost of (parm_cursor_left)       */
310 	int             _cuf_cost;      /* cost of (parm_cursor_right)      */
311 	int             _cud_cost;      /* cost of (parm_cursor_down)       */
312 	int             _cuu_cost;      /* cost of (parm_cursor_up)         */
313 	int             _hpa_cost;      /* cost of (column_address)         */
314 	int             _vpa_cost;      /* cost of (row_address)            */
315 	/* used in tty_update.c, must be chars */
316 	int             _ed_cost;       /* cost of (clr_eos)                */
317 	int             _el_cost;       /* cost of (clr_eol)                */
318 	int             _el1_cost;      /* cost of (clr_bol)                */
319 	int             _dch1_cost;     /* cost of (delete_character)       */
320 	int             _ich1_cost;     /* cost of (insert_character)       */
321 	int             _dch_cost;      /* cost of (parm_dch)               */
322 	int             _ich_cost;      /* cost of (parm_ich)               */
323 	int             _ech_cost;      /* cost of (erase_chars)            */
324 	int             _rep_cost;      /* cost of (repeat_char)            */
325 	int             _hpa_ch_cost;   /* cost of (column_address)         */
326 	int             _cup_ch_cost;   /* cost of (cursor_address)         */
327 	int             _cuf_ch_cost;   /* cost of (parm_cursor_right)      */
328 	int             _inline_cost;   /* cost of inline-move              */
329 	int             _smir_cost;	/* cost of (enter_insert_mode)      */
330 	int             _rmir_cost;	/* cost of (exit_insert_mode)       */
331 	int             _ip_cost;       /* cost of (insert_padding)         */
332 	/* used in lib_mvcur.c */
333 	char *          _address_cursor;
334 	int             _carriage_return_length;
335 	int             _cursor_home_length;
336 	int             _cursor_to_ll_length;
337 	int             _scrolling;     /* 1 if terminal's smart enough to  */
338 
339 	/* used in lib_color.c */
340 	color_t         *_color_table;  /* screen's color palette            */
341 	int             _color_count;   /* count of colors in palette        */
342 	unsigned short  *_color_pairs;  /* screen's color pair list          */
343 	int             _pair_count;    /* count of color pairs              */
344 #ifdef NCURSES_EXT_FUNCS
345 	bool            _default_color; /* use default colors                */
346 	bool            _has_sgr_39_49; /* has ECMA default color support    */
347 	int             _default_fg;    /* assumed default foreground        */
348 	int             _default_bg;    /* assumed default background        */
349 #endif
350 	chtype          _xmc_suppress;  /* attributes to suppress if xmc     */
351 	chtype          _xmc_triggers;  /* attributes to process if xmc      */
352 	chtype          _acs_map[ACS_LEN];
353 
354 	/* used in lib_vidattr.c */
355 	bool            _use_rmso;	/* true if we may use 'rmso'         */
356 	bool            _use_rmul;	/* true if we may use 'rmul'         */
357 
358 	/*
359 	 * These data correspond to the state of the idcok() and idlok()
360 	 * functions.  A caveat is in order here:  the XSI and SVr4
361 	 * documentation specify that these functions apply to the window which
362 	 * is given as an argument.  However, ncurses implements this logic
363 	 * only for the newscr/curscr update process, _not_ per-window.
364 	 */
365 	bool            _nc_sp_idlok;
366 	bool            _nc_sp_idcok;
367 #define _nc_idlok SP->_nc_sp_idlok
368 #define _nc_idcok SP->_nc_sp_idcok
369 
370 	/*
371 	 * These are the data that support the mouse interface.
372 	 */
373 	int             _maxclick;
374 	bool            (*_mouse_event) (SCREEN *);
375 	bool            (*_mouse_inline)(SCREEN *);
376 	bool            (*_mouse_parse) (int);
377 	void            (*_mouse_resume)(SCREEN *);
378 	void            (*_mouse_wrap)  (SCREEN *);
379 	int             _mouse_fd;      /* file-descriptor, if any */
380 
381 	/*
382 	 * This supports automatic resizing
383 	 */
384 #if USE_SIZECHANGE
385 	int		(*_resize)(int,int);
386 #endif
387 
388         /*
389 	 * These are data that support the proper handling of the panel stack on an
390 	 * per screen basis.
391 	 */
392         struct panelhook _panelHook;
393 	/*
394 	 * Linked-list of all windows, to support '_nc_resizeall()' and
395 	 * '_nc_freeall()'
396 	 */
397 	WINDOWLIST      *_nc_sp_windows;
398 #define _nc_windows SP->_nc_sp_windows
399 
400 	bool            _sig_winch;
401 	SCREEN          *_next_screen;
402 
403 	/* hashes for old and new lines */
404 	unsigned long	*oldhash, *newhash;
405 
406 	bool            _cleanup;	/* cleanup after int/quit signal */
407 	int             (*_outch)(int);	/* output handler if not putc */
408 };
409 
410 extern SCREEN *_nc_screen_chain;
411 
412 #ifdef NCURSES_NOMACROS
413 #include <nomacros.h>
414 #endif
415 
416 	WINDOWLIST {
417 	WINDOWLIST *next;
418 	WINDOW	*win;
419 };
420 
421 typedef	struct {
422 	int	line;                   /* lines to take, < 0 => from bottom*/
423 	int	(*hook)(struct _win_st *, int); /* callback for user        */
424 	struct _win_st *w;              /* maybe we need this for cleanup   */
425 } ripoff_t;
426 
427 /* The terminfo source is assumed to be 7-bit ASCII */
428 #define is7bits(c)	((unsigned)(c) < 128)
429 
430 #ifndef min
431 #define min(a,b)	((a) > (b)  ?  (b)  :  (a))
432 #endif
433 
434 #ifndef max
435 #define max(a,b)	((a) < (b)  ?  (b)  :  (a))
436 #endif
437 
438 /* usually in <unistd.h> */
439 #ifndef STDIN_FILENO
440 #define STDIN_FILENO 0
441 #endif
442 
443 #ifndef STDOUT_FILENO
444 #define STDOUT_FILENO 1
445 #endif
446 
447 #ifndef STDERR_FILENO
448 #define STDERR_FILENO 2
449 #endif
450 
451 #ifndef EXIT_SUCCESS
452 #define EXIT_SUCCESS 0
453 #endif
454 
455 #ifndef EXIT_FAILURE
456 #define EXIT_FAILURE 1
457 #endif
458 
459 #ifndef R_OK
460 #define	R_OK	4		/* Test for read permission.  */
461 #endif
462 #ifndef W_OK
463 #define	W_OK	2		/* Test for write permission.  */
464 #endif
465 #ifndef X_OK
466 #define	X_OK	1		/* Test for execute permission.  */
467 #endif
468 #ifndef F_OK
469 #define	F_OK	0		/* Test for existence.  */
470 #endif
471 
472 #if HAVE_FCNTL_H
473 #include <fcntl.h>		/* may define O_BINARY	*/
474 #endif
475 
476 #ifndef O_BINARY
477 #define O_BINARY 0
478 #endif
479 
480 #define TextOf(c)    ((c) & (chtype)A_CHARTEXT)
481 #define AttrOf(c)    ((c) & (chtype)A_ATTRIBUTES)
482 
483 #define BLANK        (' '|A_NORMAL)
484 
485 #define CHANGED     -1
486 
487 #define CHANGED_CELL(line,col) \
488 	if (line->firstchar == _NOCHANGE) \
489 		line->firstchar = line->lastchar = col; \
490 	else if ((col) < line->firstchar) \
491 		line->firstchar = col; \
492 	else if ((col) > line->lastchar) \
493 		line->lastchar = col
494 
495 #define CHANGED_RANGE(line,start,end) \
496 	if (line->firstchar == _NOCHANGE \
497 	 || line->firstchar > (start)) \
498 		line->firstchar = start; \
499 	if (line->lastchar == _NOCHANGE \
500 	 || line->lastchar < (end)) \
501 		line->lastchar = end
502 
503 #define CHANGED_TO_EOL(line,start,end) \
504 	if (line->firstchar == _NOCHANGE \
505 	 || line->firstchar > (start)) \
506 		line->firstchar = start; \
507 	line->lastchar = end
508 
509 #define SIZEOF(v) (sizeof(v)/sizeof(v[0]))
510 
511 #define FreeIfNeeded(p)  if ((p) != 0) free(p)
512 
513 /* FreeAndNull() is not a comma-separated expression because some compilers
514  * do not accept a mixture of void with values.
515  */
516 #define FreeAndNull(p)   free(p); p = 0
517 
518 #include <nc_alloc.h>
519 
520 /*
521  * Prefixes for call/return points of library function traces.  We use these to
522  * instrument the public functions so that the traces can be easily transformed
523  * into regression scripts.
524  */
525 #define T_CALLED(fmt) "called " fmt
526 #define T_CREATE(fmt) "create " fmt
527 #define T_RETURN(fmt) "return " fmt
528 
529 #ifdef TRACE
530 #define TR(n, a)	if (_nc_tracing & (n)) _tracef a
531 #define T(a)		TR(TRACE_CALLS, a)
532 #define TPUTS_TRACE(s)	_nc_tputs_trace = s;
533 #define TRACE_RETURN(value,type) return _nc_retrace_##type(value)
534 #define returnAttr(code) TRACE_RETURN(code,attr_t)
535 #define returnCode(code) TRACE_RETURN(code,int)
536 #define returnPtr(code)  TRACE_RETURN(code,ptr)
537 #define returnVoid       T((T_RETURN(""))); return
538 #define returnWin(code)  TRACE_RETURN(code,win)
539 extern WINDOW * _nc_retrace_win(WINDOW *);
540 extern attr_t _nc_retrace_attr_t(attr_t);
541 extern char *_nc_retrace_ptr(char *);
542 extern const char *_nc_tputs_trace;
543 extern int _nc_retrace_int(int);
544 extern long _nc_outchars;
545 extern void _nc_fifo_dump(void);
546 #else
547 #define T(a)
548 #define TR(n, a)
549 #define TPUTS_TRACE(s)
550 #define returnAttr(code) return code
551 #define returnCode(code) return code
552 #define returnPtr(code)  return code
553 #define returnVoid       return
554 #define returnWin(code)  return code
555 #endif
556 
557 extern unsigned _nc_tracing;
558 extern const char *_nc_visbuf2(int, const char *);
559 
560 #define _trace_key(ch) ((ch > KEY_MIN) ? keyname(ch) : _tracechar((unsigned char)ch))
561 
562 #define ALL_BUT_COLOR ((chtype)~(A_COLOR))
563 #define IGNORE_COLOR_OFF FALSE
564 #define NONBLANK_ATTR (A_BOLD|A_DIM|A_BLINK)
565 #define XMC_CHANGES(c) ((c) & SP->_xmc_suppress)
566 
567 
568 #define toggle_attr_on(S,at) {\
569    if (PAIR_NUMBER(at) > 0)\
570       (S) = ((S) & ALL_BUT_COLOR) | (at);\
571    else\
572       (S) |= (at);\
573    T(("new attribute is %s", _traceattr((S))));}
574 
575 
576 #define toggle_attr_off(S,at) {\
577    if (IGNORE_COLOR_OFF == TRUE) {\
578       if (PAIR_NUMBER(at) == 0xff) /* turn off color */\
579 	 (S) &= ~(at);\
580       else /* leave color alone */\
581 	 (S) &= ~((at)&ALL_BUT_COLOR);\
582    } else {\
583       if (PAIR_NUMBER(at) > 0x00) /* turn off color */\
584 	 (S) &= ~(at|A_COLOR);\
585       else /* leave color alone */\
586 	 (S) &= ~(at);\
587    }\
588    T(("new attribute is %s", _traceattr((S))));}
589 
590 #define DelCharCost(count) \
591 		((parm_dch != 0) \
592 		? SP->_dch_cost \
593 		: ((delete_character != 0) \
594 			? (SP->_dch1_cost * count) \
595 			: INFINITY))
596 
597 #define InsCharCost(count) \
598 		((parm_ich != 0) \
599 		? SP->_ich_cost \
600 		: ((enter_insert_mode && exit_insert_mode) \
601 		  ? SP->_smir_cost + SP->_rmir_cost + (SP->_ip_cost * count) \
602 		  : ((insert_character != 0) \
603 		    ? (SP->_ich1_cost * count) \
604 		    : INFINITY)))
605 
606 #if USE_XMC_SUPPORT
607 #define UpdateAttrs(c)	if (SP->_current_attr != AttrOf(c)) { \
608 				attr_t chg = SP->_current_attr; \
609 				vidattr(AttrOf(c)); \
610 				if (magic_cookie_glitch > 0 \
611 				 && XMC_CHANGES((chg ^ SP->_current_attr))) { \
612 					T(("%s @%d before glitch %d,%d", \
613 						__FILE__, __LINE__, \
614 						SP->_cursrow, \
615 						SP->_curscol)); \
616 					_nc_do_xmc_glitch(chg); \
617 				} \
618 			}
619 #else
620 #define UpdateAttrs(c)	if (SP->_current_attr != AttrOf(c)) \
621 				vidattr(AttrOf(c))
622 #endif
623 
624 #if defined(NCURSES_EXPANDED) && defined(NCURSES_EXT_FUNCS)
625 
626 #undef  toggle_attr_on
627 #define toggle_attr_on(S,at) _nc_toggle_attr_on(&(S), at)
628 extern void _nc_toggle_attr_on(attr_t *, attr_t);
629 
630 #undef  toggle_attr_off
631 #define toggle_attr_off(S,at) _nc_toggle_attr_off(&(S), at)
632 extern void _nc_toggle_attr_off(attr_t *, attr_t);
633 
634 #undef  DelCharCost
635 #define DelCharCost(count) _nc_DelCharCost(count)
636 extern int _nc_DelCharCost(int);
637 
638 #undef  InsCharCost
639 #define InsCharCost(count) _nc_InsCharCost(count)
640 extern int _nc_InsCharCost(int);
641 
642 #undef  UpdateAttrs
643 #define UpdateAttrs(c) _nc_UpdateAttrs(c)
644 extern void _nc_UpdateAttrs(chtype);
645 
646 #else
647 
648 extern void _nc_expanded(void);
649 
650 #endif
651 
652 #if !HAVE_GETCWD
653 #define getcwd(buf,len) getwd(buf)
654 #endif
655 
656 /* doupdate.c */
657 #if USE_XMC_SUPPORT
658 extern void _nc_do_xmc_glitch(attr_t);
659 #endif
660 
661 /* hardscroll.c */
662 #if defined(TRACE) || defined(SCROLLDEBUG) || defined(HASHDEBUG)
663 extern void _nc_linedump(void);
664 #endif
665 
666 /* lib_acs.c */
667 extern void _nc_init_acs(void);	/* corresponds to traditional 'init_acs()' */
668 extern int _nc_msec_cost(const char *const, int);  /* used by 'tack' program */
669 
670 /* lib_mvcur.c */
671 #define INFINITY	1000000	/* cost: too high to use */
672 
673 extern void _nc_mvcur_init(void);
674 extern void _nc_mvcur_resume(void);
675 extern void _nc_mvcur_wrap(void);
676 
677 extern int _nc_scrolln(int, int, int, int);
678 
679 extern void _nc_screen_init(void);
680 extern void _nc_screen_resume(void);
681 extern void _nc_screen_wrap(void);
682 
683 #if !HAVE_STRSTR
684 #define strstr _nc_strstr
685 extern char *_nc_strstr(const char *, const char *);
686 #endif
687 
688 /* lib_mouse.c */
689 extern int _nc_has_mouse(void);
690 
691 /* safe_sprintf.c */
692 extern char * _nc_printf_string(const char *fmt, va_list ap);
693 
694 /* tries.c */
695 extern void _nc_add_to_try(struct tries **tree, const char *str, unsigned short code);
696 extern char *_nc_expand_try(struct tries *tree, unsigned short code, int *count, size_t len);
697 extern int _nc_remove_key(struct tries **tree, unsigned short code);
698 extern int _nc_remove_string(struct tries **tree, char *string);
699 
700 /* elsewhere ... */
701 extern WINDOW *_nc_makenew(int, int, int, int, int);
702 extern char *_nc_home_terminfo(void);
703 extern char *_nc_trace_buf(int, size_t);
704 extern chtype _nc_background(WINDOW *);
705 extern chtype _nc_render(WINDOW *, chtype);
706 extern int _nc_access(const char *, int);
707 extern int _nc_baudrate(int);
708 extern int _nc_getenv_num(const char *);
709 extern int _nc_keypad(bool);
710 extern int _nc_ospeed(int);
711 extern int _nc_outch(int);
712 extern int _nc_setupscreen(short, short const, FILE *);
713 extern int _nc_timed_wait(int, int, int *);
714 extern int _nc_waddch_nosync(WINDOW *, const chtype);
715 extern void _nc_do_color(int, int, bool, int (*)(int));
716 extern void _nc_freeall(void);
717 extern void _nc_freewin(WINDOW *win);
718 extern void _nc_hash_map(void);
719 extern void _nc_init_keytry(void);
720 extern void _nc_keep_tic_dir(const char *);
721 extern void _nc_make_oldhash(int i);
722 extern void _nc_flush(void);
723 extern void _nc_outstr(const char *str);
724 extern void _nc_scroll_oldhash(int n, int top, int bot);
725 extern void _nc_scroll_optimize(void);
726 extern void _nc_scroll_window(WINDOW *, int const, short const, short const, chtype);
727 extern void _nc_set_buffer(FILE *, bool);
728 extern void _nc_signal_handler(bool);
729 extern void _nc_synchook(WINDOW *win);
730 extern void _nc_trace_tries(struct tries *tree);
731 
732 #if USE_SIZECHANGE
733 extern void _nc_update_screensize(void);
734 #endif
735 
736 #ifdef USE_WIDEC_SUPPORT
737 extern int _nc_utf8_outch(int);
738 #endif
739 
740 /* scroll indices */
741 extern int *_nc_oldnums;
742 
743 #define USE_SETBUF_0 0
744 
745 #define NC_BUFFERED(flag) \
746 	if ((SP->_buffered != 0) != flag) \
747 		_nc_set_buffer(SP->_ofp, flag)
748 
749 #define NC_OUTPUT ((SP != 0) ? SP->_ofp : stdout)
750 
751 /*
752  * On systems with a broken linker, define 'SP' as a function to force the
753  * linker to pull in the data-only module with 'SP'.
754  */
755 #ifndef BROKEN_LINKER
756 #define BROKEN_LINKER 0
757 #endif
758 
759 #if BROKEN_LINKER
760 #define SP _nc_screen()
761 extern SCREEN *_nc_screen(void);
762 extern int _nc_alloc_screen(void);
763 extern void _nc_set_screen(SCREEN *);
764 #else
765 /* current screen is private data; avoid possible linking conflicts too */
766 extern SCREEN *SP;
767 #define _nc_alloc_screen() ((SP = typeCalloc(SCREEN, 1)) != 0)
768 #define _nc_set_screen(sp) SP = sp
769 #endif
770 
771 /*
772  * We don't want to use the lines or columns capabilities internally,
773  * because if the application is running multiple screens under
774  * X windows, it's quite possible they could all have type xterm
775  * but have different sizes!  So...
776  */
777 #define screen_lines	SP->_lines
778 #define screen_columns	SP->_columns
779 
780 extern int _nc_slk_format;  /* != 0 if slk_init() called */
781 extern int _nc_slk_initialize(WINDOW *, int);
782 
783 /*
784  * Some constants related to SLK's
785  */
786 #define MAX_SKEY_OLD	   8	/* count of soft keys */
787 #define MAX_SKEY_LEN_OLD   8	/* max length of soft key text */
788 #define MAX_SKEY_PC       12    /* This is what most PC's have */
789 #define MAX_SKEY_LEN_PC    5
790 
791 /* Macro to check whether or not we use a standard format */
792 #define SLK_STDFMT(fmt) (fmt < 3)
793 /* Macro to determine height of label window */
794 #define SLK_LINES(fmt)  (SLK_STDFMT(fmt) ? 1 : ((fmt) - 2))
795 
796 #define MAX_SKEY(fmt)     (SLK_STDFMT(fmt)? MAX_SKEY_OLD : MAX_SKEY_PC)
797 #define MAX_SKEY_LEN(fmt) (SLK_STDFMT(fmt)? MAX_SKEY_LEN_OLD : MAX_SKEY_LEN_PC)
798 
799 extern int _nc_ripoffline(int line, int (*init)(WINDOW *,int));
800 
801 #ifdef __cplusplus
802 }
803 #endif
804 
805 #endif /* CURSES_PRIV_H */
806