1/*
2 * Copyright (C) 1984-2012  Mark Nudelman
3 *
4 * You may distribute under the terms of either the GNU General Public
5 * License or the Less License, as specified in the README file.
6 *
7 * For more information, see the README file.
8 */
9
10
11/*
12 * Routines which deal with the characteristics of the terminal.
13 * Uses termcap to be as terminal-independent as possible.
14 */
15
16#include "less.h"
17#include "cmd.h"
18
19#if MSDOS_COMPILER
20#include "pckeys.h"
21#if MSDOS_COMPILER==MSOFTC
22#include <graph.h>
23#else
24#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
25#include <conio.h>
26#if MSDOS_COMPILER==DJGPPC
27#include <pc.h>
28extern int fd0;
29#endif
30#else
31#if MSDOS_COMPILER==WIN32C
32#include <windows.h>
33#endif
34#endif
35#endif
36#include <time.h>
37
38#else
39
40#if HAVE_SYS_IOCTL_H
41#include <sys/ioctl.h>
42#endif
43
44#if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS
45#include <termios.h>
46#else
47#if HAVE_TERMIO_H
48#include <termio.h>
49#else
50#if HAVE_SGSTAT_H
51#include <sgstat.h>
52#else
53#include <sgtty.h>
54#endif
55#endif
56#endif
57
58#if HAVE_TERMCAP_H
59#include <termcap.h>
60#endif
61#ifdef _OSK
62#include <signal.h>
63#endif
64#if OS2
65#include <sys/signal.h>
66#include "pckeys.h"
67#endif
68#if HAVE_SYS_STREAM_H
69#include <sys/stream.h>
70#endif
71#if HAVE_SYS_PTEM_H
72#include <sys/ptem.h>
73#endif
74
75#endif /* MSDOS_COMPILER */
76
77/*
78 * Check for broken termios package that forces you to manually
79 * set the line discipline.
80 */
81#ifdef __ultrix__
82#define MUST_SET_LINE_DISCIPLINE 1
83#else
84#define MUST_SET_LINE_DISCIPLINE 0
85#endif
86
87#if OS2
88#define	DEFAULT_TERM		"ansi"
89static char *windowid;
90#else
91#define	DEFAULT_TERM		"unknown"
92#endif
93
94#if MSDOS_COMPILER==MSOFTC
95static int videopages;
96static long msec_loops;
97static int flash_created = 0;
98#define	SETCOLORS(fg,bg)	{ _settextcolor(fg); _setbkcolor(bg); }
99#endif
100
101#if MSDOS_COMPILER==BORLANDC
102static unsigned short *whitescreen;
103static int flash_created = 0;
104#endif
105#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
106#define _settextposition(y,x)   gotoxy(x,y)
107#define _clearscreen(m)         clrscr()
108#define _outtext(s)             cputs(s)
109#define	SETCOLORS(fg,bg)	{ textcolor(fg); textbackground(bg); }
110extern int sc_height;
111#endif
112
113#if MSDOS_COMPILER==WIN32C
114struct keyRecord
115{
116	int ascii;
117	int scan;
118} currentKey;
119
120static int keyCount = 0;
121static WORD curr_attr;
122static int pending_scancode = 0;
123static WORD *whitescreen;
124
125static HANDLE con_out_save = INVALID_HANDLE_VALUE; /* previous console */
126static HANDLE con_out_ours = INVALID_HANDLE_VALUE; /* our own */
127HANDLE con_out = INVALID_HANDLE_VALUE;             /* current console */
128
129extern int quitting;
130static void win32_init_term();
131static void win32_deinit_term();
132
133#define FG_COLORS       (FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_INTENSITY)
134#define BG_COLORS       (BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_INTENSITY)
135#define	MAKEATTR(fg,bg)		((WORD)((fg)|((bg)<<4)))
136#define	SETCOLORS(fg,bg)	{ curr_attr = MAKEATTR(fg,bg); \
137				if (SetConsoleTextAttribute(con_out, curr_attr) == 0) \
138				error("SETCOLORS failed"); }
139#endif
140
141#if MSDOS_COMPILER
142public int nm_fg_color;		/* Color of normal text */
143public int nm_bg_color;
144public int bo_fg_color;		/* Color of bold text */
145public int bo_bg_color;
146public int ul_fg_color;		/* Color of underlined text */
147public int ul_bg_color;
148public int so_fg_color;		/* Color of standout text */
149public int so_bg_color;
150public int bl_fg_color;		/* Color of blinking text */
151public int bl_bg_color;
152static int sy_fg_color;		/* Color of system text (before less) */
153static int sy_bg_color;
154
155#else
156
157/*
158 * Strings passed to tputs() to do various terminal functions.
159 */
160static char
161	*sc_pad,		/* Pad string */
162	*sc_home,		/* Cursor home */
163	*sc_addline,		/* Add line, scroll down following lines */
164	*sc_lower_left,		/* Cursor to last line, first column */
165	*sc_return,		/* Cursor to beginning of current line */
166	*sc_move,		/* General cursor positioning */
167	*sc_clear,		/* Clear screen */
168	*sc_eol_clear,		/* Clear to end of line */
169	*sc_eos_clear,		/* Clear to end of screen */
170	*sc_s_in,		/* Enter standout (highlighted) mode */
171	*sc_s_out,		/* Exit standout mode */
172	*sc_u_in,		/* Enter underline mode */
173	*sc_u_out,		/* Exit underline mode */
174	*sc_b_in,		/* Enter bold mode */
175	*sc_b_out,		/* Exit bold mode */
176	*sc_bl_in,		/* Enter blink mode */
177	*sc_bl_out,		/* Exit blink mode */
178	*sc_visual_bell,	/* Visual bell (flash screen) sequence */
179	*sc_backspace,		/* Backspace cursor */
180	*sc_s_keypad,		/* Start keypad mode */
181	*sc_e_keypad,		/* End keypad mode */
182	*sc_init,		/* Startup terminal initialization */
183	*sc_deinit;		/* Exit terminal de-initialization */
184#endif
185
186static int init_done = 0;
187
188public int auto_wrap;		/* Terminal does \r\n when write past margin */
189public int ignaw;		/* Terminal ignores \n immediately after wrap */
190public int erase_char;		/* The user's erase char */
191public int erase2_char;		/* The user's other erase char */
192public int kill_char;		/* The user's line-kill char */
193public int werase_char;		/* The user's word-erase char */
194public int sc_width, sc_height;	/* Height & width of screen */
195public int bo_s_width, bo_e_width;	/* Printing width of boldface seq */
196public int ul_s_width, ul_e_width;	/* Printing width of underline seq */
197public int so_s_width, so_e_width;	/* Printing width of standout seq */
198public int bl_s_width, bl_e_width;	/* Printing width of blink seq */
199public int above_mem, below_mem;	/* Memory retained above/below screen */
200public int can_goto_line;		/* Can move cursor to any line */
201public int clear_bg;		/* Clear fills with background color */
202public int missing_cap = 0;	/* Some capability is missing */
203
204static int attrmode = AT_NORMAL;
205extern int binattr;
206
207#if !MSDOS_COMPILER
208static char *cheaper();
209static void tmodes();
210#endif
211
212/*
213 * These two variables are sometimes defined in,
214 * and needed by, the termcap library.
215 */
216#if MUST_DEFINE_OSPEED
217extern short ospeed;	/* Terminal output baud rate */
218extern char PC;		/* Pad character */
219#endif
220#ifdef _OSK
221short ospeed;
222char PC_, *UP, *BC;
223#endif
224
225extern int quiet;		/* If VERY_QUIET, use visual bell for bell */
226extern int no_back_scroll;
227extern int swindow;
228extern int no_init;
229extern int no_keypad;
230extern int sigs;
231extern int wscroll;
232extern int screen_trashed;
233extern int tty;
234extern int top_scroll;
235extern int oldbot;
236#if HILITE_SEARCH
237extern int hilite_search;
238#endif
239
240extern char *tgetstr();
241extern char *tgoto();
242
243
244/*
245 * Change terminal to "raw mode", or restore to "normal" mode.
246 * "Raw mode" means
247 *	1. An outstanding read will complete on receipt of a single keystroke.
248 *	2. Input is not echoed.
249 *	3. On output, \n is mapped to \r\n.
250 *	4. \t is NOT expanded into spaces.
251 *	5. Signal-causing characters such as ctrl-C (interrupt),
252 *	   etc. are NOT disabled.
253 * It doesn't matter whether an input \n is mapped to \r, or vice versa.
254 */
255	public void
256raw_mode(on)
257	int on;
258{
259	static int curr_on = 0;
260
261	if (on == curr_on)
262		return;
263	erase2_char = '\b'; /* in case OS doesn't know about erase2 */
264#if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS
265    {
266	struct termios s;
267	static struct termios save_term;
268	static int saved_term = 0;
269
270	if (on)
271	{
272		/*
273		 * Get terminal modes.
274		 */
275		tcgetattr(tty, &s);
276
277		/*
278		 * Save modes and set certain variables dependent on modes.
279		 */
280		if (!saved_term)
281		{
282			save_term = s;
283			saved_term = 1;
284		}
285#if HAVE_OSPEED
286		switch (cfgetospeed(&s))
287		{
288#ifdef B0
289		case B0: ospeed = 0; break;
290#endif
291#ifdef B50
292		case B50: ospeed = 1; break;
293#endif
294#ifdef B75
295		case B75: ospeed = 2; break;
296#endif
297#ifdef B110
298		case B110: ospeed = 3; break;
299#endif
300#ifdef B134
301		case B134: ospeed = 4; break;
302#endif
303#ifdef B150
304		case B150: ospeed = 5; break;
305#endif
306#ifdef B200
307		case B200: ospeed = 6; break;
308#endif
309#ifdef B300
310		case B300: ospeed = 7; break;
311#endif
312#ifdef B600
313		case B600: ospeed = 8; break;
314#endif
315#ifdef B1200
316		case B1200: ospeed = 9; break;
317#endif
318#ifdef B1800
319		case B1800: ospeed = 10; break;
320#endif
321#ifdef B2400
322		case B2400: ospeed = 11; break;
323#endif
324#ifdef B4800
325		case B4800: ospeed = 12; break;
326#endif
327#ifdef B9600
328		case B9600: ospeed = 13; break;
329#endif
330#ifdef EXTA
331		case EXTA: ospeed = 14; break;
332#endif
333#ifdef EXTB
334		case EXTB: ospeed = 15; break;
335#endif
336#ifdef B57600
337		case B57600: ospeed = 16; break;
338#endif
339#ifdef B115200
340		case B115200: ospeed = 17; break;
341#endif
342		default: ;
343		}
344#endif
345		erase_char = s.c_cc[VERASE];
346#ifdef VERASE2
347		erase2_char = s.c_cc[VERASE2];
348#endif
349		kill_char = s.c_cc[VKILL];
350#ifdef VWERASE
351		werase_char = s.c_cc[VWERASE];
352#else
353		werase_char = CONTROL('W');
354#endif
355
356		/*
357		 * Set the modes to the way we want them.
358		 */
359		s.c_lflag &= ~(0
360#ifdef ICANON
361			| ICANON
362#endif
363#ifdef ECHO
364			| ECHO
365#endif
366#ifdef ECHOE
367			| ECHOE
368#endif
369#ifdef ECHOK
370			| ECHOK
371#endif
372#if ECHONL
373			| ECHONL
374#endif
375		);
376
377		s.c_oflag |= (0
378#ifdef OXTABS
379			| OXTABS
380#else
381#ifdef TAB3
382			| TAB3
383#else
384#ifdef XTABS
385			| XTABS
386#endif
387#endif
388#endif
389#ifdef OPOST
390			| OPOST
391#endif
392#ifdef ONLCR
393			| ONLCR
394#endif
395		);
396
397		s.c_oflag &= ~(0
398#ifdef ONOEOT
399			| ONOEOT
400#endif
401#ifdef OCRNL
402			| OCRNL
403#endif
404#ifdef ONOCR
405			| ONOCR
406#endif
407#ifdef ONLRET
408			| ONLRET
409#endif
410		);
411		s.c_cc[VMIN] = 1;
412		s.c_cc[VTIME] = 0;
413#ifdef VLNEXT
414		s.c_cc[VLNEXT] = 0;
415#endif
416#ifdef VDSUSP
417		s.c_cc[VDSUSP] = 0;
418#endif
419#if MUST_SET_LINE_DISCIPLINE
420		/*
421		 * System's termios is broken; need to explicitly
422		 * request TERMIODISC line discipline.
423		 */
424		s.c_line = TERMIODISC;
425#endif
426	} else
427	{
428		/*
429		 * Restore saved modes.
430		 */
431		s = save_term;
432	}
433#if HAVE_FSYNC
434	fsync(tty);
435#endif
436	tcsetattr(tty, TCSADRAIN, &s);
437#if MUST_SET_LINE_DISCIPLINE
438	if (!on)
439	{
440		/*
441		 * Broken termios *ignores* any line discipline
442		 * except TERMIODISC.  A different old line discipline
443		 * is therefore not restored, yet.  Restore the old
444		 * line discipline by hand.
445		 */
446		ioctl(tty, TIOCSETD, &save_term.c_line);
447	}
448#endif
449    }
450#else
451#ifdef TCGETA
452    {
453	struct termio s;
454	static struct termio save_term;
455	static int saved_term = 0;
456
457	if (on)
458	{
459		/*
460		 * Get terminal modes.
461		 */
462		ioctl(tty, TCGETA, &s);
463
464		/*
465		 * Save modes and set certain variables dependent on modes.
466		 */
467		if (!saved_term)
468		{
469			save_term = s;
470			saved_term = 1;
471		}
472#if HAVE_OSPEED
473		ospeed = s.c_cflag & CBAUD;
474#endif
475		erase_char = s.c_cc[VERASE];
476		kill_char = s.c_cc[VKILL];
477#ifdef VWERASE
478		werase_char = s.c_cc[VWERASE];
479#else
480		werase_char = CONTROL('W');
481#endif
482
483		/*
484		 * Set the modes to the way we want them.
485		 */
486		s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL);
487		s.c_oflag |=  (OPOST|ONLCR|TAB3);
488		s.c_oflag &= ~(OCRNL|ONOCR|ONLRET);
489		s.c_cc[VMIN] = 1;
490		s.c_cc[VTIME] = 0;
491	} else
492	{
493		/*
494		 * Restore saved modes.
495		 */
496		s = save_term;
497	}
498	ioctl(tty, TCSETAW, &s);
499    }
500#else
501#ifdef TIOCGETP
502    {
503	struct sgttyb s;
504	static struct sgttyb save_term;
505	static int saved_term = 0;
506
507	if (on)
508	{
509		/*
510		 * Get terminal modes.
511		 */
512		ioctl(tty, TIOCGETP, &s);
513
514		/*
515		 * Save modes and set certain variables dependent on modes.
516		 */
517		if (!saved_term)
518		{
519			save_term = s;
520			saved_term = 1;
521		}
522#if HAVE_OSPEED
523		ospeed = s.sg_ospeed;
524#endif
525		erase_char = s.sg_erase;
526		kill_char = s.sg_kill;
527		werase_char = CONTROL('W');
528
529		/*
530		 * Set the modes to the way we want them.
531		 */
532		s.sg_flags |= CBREAK;
533		s.sg_flags &= ~(ECHO|XTABS);
534	} else
535	{
536		/*
537		 * Restore saved modes.
538		 */
539		s = save_term;
540	}
541	ioctl(tty, TIOCSETN, &s);
542    }
543#else
544#ifdef _OSK
545    {
546	struct sgbuf s;
547	static struct sgbuf save_term;
548	static int saved_term = 0;
549
550	if (on)
551	{
552		/*
553		 * Get terminal modes.
554		 */
555		_gs_opt(tty, &s);
556
557		/*
558		 * Save modes and set certain variables dependent on modes.
559		 */
560		if (!saved_term)
561		{
562			save_term = s;
563			saved_term = 1;
564		}
565		erase_char = s.sg_bspch;
566		kill_char = s.sg_dlnch;
567		werase_char = CONTROL('W');
568
569		/*
570		 * Set the modes to the way we want them.
571		 */
572		s.sg_echo = 0;
573		s.sg_eofch = 0;
574		s.sg_pause = 0;
575		s.sg_psch = 0;
576	} else
577	{
578		/*
579		 * Restore saved modes.
580		 */
581		s = save_term;
582	}
583	_ss_opt(tty, &s);
584    }
585#else
586	/* MS-DOS, Windows, or OS2 */
587#if OS2
588	/* OS2 */
589	LSIGNAL(SIGINT, SIG_IGN);
590#endif
591	erase_char = '\b';
592#if MSDOS_COMPILER==DJGPPC
593	kill_char = CONTROL('U');
594	/*
595	 * So that when we shell out or run another program, its
596	 * stdin is in cooked mode.  We do not switch stdin to binary
597	 * mode if fd0 is zero, since that means we were called before
598	 * tty was reopened in open_getchr, in which case we would be
599	 * changing the original stdin device outside less.
600	 */
601	if (fd0 != 0)
602		setmode(0, on ? O_BINARY : O_TEXT);
603#else
604	kill_char = ESC;
605#endif
606	werase_char = CONTROL('W');
607#endif
608#endif
609#endif
610#endif
611	curr_on = on;
612}
613
614#if !MSDOS_COMPILER
615/*
616 * Some glue to prevent calling termcap functions if tgetent() failed.
617 */
618static int hardcopy;
619
620	static char *
621ltget_env(capname)
622	char *capname;
623{
624	char name[16];
625	char *s;
626
627	s = lgetenv("LESS_TERMCAP_DEBUG");
628	if (s != NULL && *s != '\0')
629	{
630		struct env { struct env *next; char *name; char *value; };
631		static struct env *envs = NULL;
632		struct env *p;
633		for (p = envs;  p != NULL;  p = p->next)
634			if (strcmp(p->name, capname) == 0)
635				return p->value;
636		p = (struct env *) ecalloc(1, sizeof(struct env));
637		p->name = save(capname);
638		p->value = (char *) ecalloc(strlen(capname)+3, sizeof(char));
639		sprintf(p->value, "<%s>", capname);
640		p->next = envs;
641		envs = p;
642		return p->value;
643	}
644	strcpy(name, "LESS_TERMCAP_");
645	strcat(name, capname);
646	return (lgetenv(name));
647}
648
649	static int
650ltgetflag(capname)
651	char *capname;
652{
653	char *s;
654
655	if ((s = ltget_env(capname)) != NULL)
656		return (*s != '\0' && *s != '0');
657	if (hardcopy)
658		return (0);
659	return (tgetflag(capname));
660}
661
662	static int
663ltgetnum(capname)
664	char *capname;
665{
666	char *s;
667
668	if ((s = ltget_env(capname)) != NULL)
669		return (atoi(s));
670	if (hardcopy)
671		return (-1);
672	return (tgetnum(capname));
673}
674
675	static char *
676ltgetstr(capname, pp)
677	char *capname;
678	char **pp;
679{
680	char *s;
681
682	if ((s = ltget_env(capname)) != NULL)
683		return (s);
684	if (hardcopy)
685		return (NULL);
686	return (tgetstr(capname, pp));
687}
688#endif /* MSDOS_COMPILER */
689
690/*
691 * Get size of the output screen.
692 */
693	public void
694scrsize()
695{
696	register char *s;
697	int sys_height;
698	int sys_width;
699#if !MSDOS_COMPILER
700	int n;
701#endif
702
703#define	DEF_SC_WIDTH	80
704#if MSDOS_COMPILER
705#define	DEF_SC_HEIGHT	25
706#else
707#define	DEF_SC_HEIGHT	24
708#endif
709
710
711	sys_width = sys_height = 0;
712
713#if MSDOS_COMPILER==MSOFTC
714	{
715		struct videoconfig w;
716		_getvideoconfig(&w);
717		sys_height = w.numtextrows;
718		sys_width = w.numtextcols;
719	}
720#else
721#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
722	{
723		struct text_info w;
724		gettextinfo(&w);
725		sys_height = w.screenheight;
726		sys_width = w.screenwidth;
727	}
728#else
729#if MSDOS_COMPILER==WIN32C
730	{
731		CONSOLE_SCREEN_BUFFER_INFO scr;
732		GetConsoleScreenBufferInfo(con_out, &scr);
733		sys_height = scr.srWindow.Bottom - scr.srWindow.Top + 1;
734		sys_width = scr.srWindow.Right - scr.srWindow.Left + 1;
735	}
736#else
737#if OS2
738	{
739		int s[2];
740		_scrsize(s);
741		sys_width = s[0];
742		sys_height = s[1];
743		/*
744		 * When using terminal emulators for XFree86/OS2, the
745		 * _scrsize function does not work well.
746		 * Call the scrsize.exe program to get the window size.
747		 */
748		windowid = getenv("WINDOWID");
749		if (windowid != NULL)
750		{
751			FILE *fd = popen("scrsize", "rt");
752			if (fd != NULL)
753			{
754				int w, h;
755				fscanf(fd, "%i %i", &w, &h);
756				if (w > 0 && h > 0)
757				{
758					sys_width = w;
759					sys_height = h;
760				}
761				pclose(fd);
762			}
763		}
764	}
765#else
766#ifdef TIOCGWINSZ
767	{
768		struct winsize w;
769		if (ioctl(2, TIOCGWINSZ, &w) == 0)
770		{
771			if (w.ws_row > 0)
772				sys_height = w.ws_row;
773			if (w.ws_col > 0)
774				sys_width = w.ws_col;
775		}
776	}
777#else
778#ifdef WIOCGETD
779	{
780		struct uwdata w;
781		if (ioctl(2, WIOCGETD, &w) == 0)
782		{
783			if (w.uw_height > 0)
784				sys_height = w.uw_height / w.uw_vs;
785			if (w.uw_width > 0)
786				sys_width = w.uw_width / w.uw_hs;
787		}
788	}
789#endif
790#endif
791#endif
792#endif
793#endif
794#endif
795
796	if (sys_height > 0)
797		sc_height = sys_height;
798	else if ((s = lgetenv("LINES")) != NULL)
799		sc_height = atoi(s);
800#if !MSDOS_COMPILER
801	else if ((n = ltgetnum("li")) > 0)
802 		sc_height = n;
803#endif
804	if (sc_height <= 0)
805		sc_height = DEF_SC_HEIGHT;
806
807	if (sys_width > 0)
808		sc_width = sys_width;
809	else if ((s = lgetenv("COLUMNS")) != NULL)
810		sc_width = atoi(s);
811#if !MSDOS_COMPILER
812	else if ((n = ltgetnum("co")) > 0)
813 		sc_width = n;
814#endif
815	if (sc_width <= 0)
816		sc_width = DEF_SC_WIDTH;
817}
818
819#if MSDOS_COMPILER==MSOFTC
820/*
821 * Figure out how many empty loops it takes to delay a millisecond.
822 */
823	static void
824get_clock()
825{
826	clock_t start;
827
828	/*
829	 * Get synchronized at the start of a tick.
830	 */
831	start = clock();
832	while (clock() == start)
833		;
834	/*
835	 * Now count loops till the next tick.
836	 */
837	start = clock();
838	msec_loops = 0;
839	while (clock() == start)
840		msec_loops++;
841	/*
842	 * Convert from (loops per clock) to (loops per millisecond).
843	 */
844	msec_loops *= CLOCKS_PER_SEC;
845	msec_loops /= 1000;
846}
847
848/*
849 * Delay for a specified number of milliseconds.
850 */
851	static void
852dummy_func()
853{
854	static long delay_dummy = 0;
855	delay_dummy++;
856}
857
858	static void
859delay(msec)
860	int msec;
861{
862	long i;
863
864	while (msec-- > 0)
865	{
866		for (i = 0;  i < msec_loops;  i++)
867		{
868			/*
869			 * Make it look like we're doing something here,
870			 * so the optimizer doesn't remove the whole loop.
871			 */
872			dummy_func();
873		}
874	}
875}
876#endif
877
878/*
879 * Return the characters actually input by a "special" key.
880 */
881	public char *
882special_key_str(key)
883	int key;
884{
885	static char tbuf[40];
886	char *s;
887#if MSDOS_COMPILER || OS2
888	static char k_right[]		= { '\340', PCK_RIGHT, 0 };
889	static char k_left[]		= { '\340', PCK_LEFT, 0  };
890	static char k_ctl_right[]	= { '\340', PCK_CTL_RIGHT, 0  };
891	static char k_ctl_left[]	= { '\340', PCK_CTL_LEFT, 0  };
892	static char k_insert[]		= { '\340', PCK_INSERT, 0  };
893	static char k_delete[]		= { '\340', PCK_DELETE, 0  };
894	static char k_ctl_delete[]	= { '\340', PCK_CTL_DELETE, 0  };
895	static char k_ctl_backspace[]	= { '\177', 0 };
896	static char k_home[]		= { '\340', PCK_HOME, 0 };
897	static char k_end[]		= { '\340', PCK_END, 0 };
898	static char k_up[]		= { '\340', PCK_UP, 0 };
899	static char k_down[]		= { '\340', PCK_DOWN, 0 };
900	static char k_backtab[]		= { '\340', PCK_SHIFT_TAB, 0 };
901	static char k_pagedown[]	= { '\340', PCK_PAGEDOWN, 0 };
902	static char k_pageup[]		= { '\340', PCK_PAGEUP, 0 };
903	static char k_f1[]		= { '\340', PCK_F1, 0 };
904#endif
905#if !MSDOS_COMPILER
906	char *sp = tbuf;
907#endif
908
909	switch (key)
910	{
911#if OS2
912	/*
913	 * If windowid is not NULL, assume less is executed in
914	 * the XFree86 environment.
915	 */
916	case SK_RIGHT_ARROW:
917		s = windowid ? ltgetstr("kr", &sp) : k_right;
918		break;
919	case SK_LEFT_ARROW:
920		s = windowid ? ltgetstr("kl", &sp) : k_left;
921		break;
922	case SK_UP_ARROW:
923		s = windowid ? ltgetstr("ku", &sp) : k_up;
924		break;
925	case SK_DOWN_ARROW:
926		s = windowid ? ltgetstr("kd", &sp) : k_down;
927		break;
928	case SK_PAGE_UP:
929		s = windowid ? ltgetstr("kP", &sp) : k_pageup;
930		break;
931	case SK_PAGE_DOWN:
932		s = windowid ? ltgetstr("kN", &sp) : k_pagedown;
933		break;
934	case SK_HOME:
935		s = windowid ? ltgetstr("kh", &sp) : k_home;
936		break;
937	case SK_END:
938		s = windowid ? ltgetstr("@7", &sp) : k_end;
939		break;
940	case SK_DELETE:
941		if (windowid)
942		{
943			s = ltgetstr("kD", &sp);
944			if (s == NULL)
945			{
946				tbuf[0] = '\177';
947				tbuf[1] = '\0';
948				s = tbuf;
949			}
950		} else
951			s = k_delete;
952		break;
953#endif
954#if MSDOS_COMPILER
955	case SK_RIGHT_ARROW:
956		s = k_right;
957		break;
958	case SK_LEFT_ARROW:
959		s = k_left;
960		break;
961	case SK_UP_ARROW:
962		s = k_up;
963		break;
964	case SK_DOWN_ARROW:
965		s = k_down;
966		break;
967	case SK_PAGE_UP:
968		s = k_pageup;
969		break;
970	case SK_PAGE_DOWN:
971		s = k_pagedown;
972		break;
973	case SK_HOME:
974		s = k_home;
975		break;
976	case SK_END:
977		s = k_end;
978		break;
979	case SK_DELETE:
980		s = k_delete;
981		break;
982#endif
983#if MSDOS_COMPILER || OS2
984	case SK_INSERT:
985		s = k_insert;
986		break;
987	case SK_CTL_LEFT_ARROW:
988		s = k_ctl_left;
989		break;
990	case SK_CTL_RIGHT_ARROW:
991		s = k_ctl_right;
992		break;
993	case SK_CTL_BACKSPACE:
994		s = k_ctl_backspace;
995		break;
996	case SK_CTL_DELETE:
997		s = k_ctl_delete;
998		break;
999	case SK_F1:
1000		s = k_f1;
1001		break;
1002	case SK_BACKTAB:
1003		s = k_backtab;
1004		break;
1005#else
1006	case SK_RIGHT_ARROW:
1007		s = ltgetstr("kr", &sp);
1008		break;
1009	case SK_LEFT_ARROW:
1010		s = ltgetstr("kl", &sp);
1011		break;
1012	case SK_UP_ARROW:
1013		s = ltgetstr("ku", &sp);
1014		break;
1015	case SK_DOWN_ARROW:
1016		s = ltgetstr("kd", &sp);
1017		break;
1018	case SK_PAGE_UP:
1019		s = ltgetstr("kP", &sp);
1020		break;
1021	case SK_PAGE_DOWN:
1022		s = ltgetstr("kN", &sp);
1023		break;
1024	case SK_HOME:
1025		s = ltgetstr("kh", &sp);
1026		break;
1027	case SK_END:
1028		s = ltgetstr("@7", &sp);
1029		break;
1030	case SK_DELETE:
1031		s = ltgetstr("kD", &sp);
1032		if (s == NULL)
1033		{
1034			tbuf[0] = '\177';
1035			tbuf[1] = '\0';
1036			s = tbuf;
1037		}
1038		break;
1039#endif
1040	case SK_CONTROL_K:
1041		tbuf[0] = CONTROL('K');
1042		tbuf[1] = '\0';
1043		s = tbuf;
1044		break;
1045	default:
1046		return (NULL);
1047	}
1048	return (s);
1049}
1050
1051/*
1052 * Get terminal capabilities via termcap.
1053 */
1054	public void
1055get_term()
1056{
1057#if MSDOS_COMPILER
1058	auto_wrap = 1;
1059	ignaw = 0;
1060	can_goto_line = 1;
1061	clear_bg = 1;
1062	/*
1063	 * Set up default colors.
1064	 * The xx_s_width and xx_e_width vars are already initialized to 0.
1065	 */
1066#if MSDOS_COMPILER==MSOFTC
1067	sy_bg_color = _getbkcolor();
1068	sy_fg_color = _gettextcolor();
1069	get_clock();
1070#else
1071#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1072    {
1073	struct text_info w;
1074	gettextinfo(&w);
1075	sy_bg_color = (w.attribute >> 4) & 0x0F;
1076	sy_fg_color = (w.attribute >> 0) & 0x0F;
1077    }
1078#else
1079#if MSDOS_COMPILER==WIN32C
1080    {
1081	DWORD nread;
1082	CONSOLE_SCREEN_BUFFER_INFO scr;
1083
1084	con_out_save = con_out = GetStdHandle(STD_OUTPUT_HANDLE);
1085	/*
1086	 * Always open stdin in binary. Note this *must* be done
1087	 * before any file operations have been done on fd0.
1088	 */
1089	SET_BINARY(0);
1090	GetConsoleScreenBufferInfo(con_out, &scr);
1091	ReadConsoleOutputAttribute(con_out, &curr_attr,
1092					1, scr.dwCursorPosition, &nread);
1093	sy_bg_color = (curr_attr & BG_COLORS) >> 4; /* normalize */
1094	sy_fg_color = curr_attr & FG_COLORS;
1095    }
1096#endif
1097#endif
1098#endif
1099	nm_fg_color = sy_fg_color;
1100	nm_bg_color = sy_bg_color;
1101	bo_fg_color = 11;
1102	bo_bg_color = 0;
1103	ul_fg_color = 9;
1104	ul_bg_color = 0;
1105	so_fg_color = 15;
1106	so_bg_color = 9;
1107	bl_fg_color = 15;
1108	bl_bg_color = 0;
1109
1110	/*
1111	 * Get size of the screen.
1112	 */
1113	scrsize();
1114	pos_init();
1115
1116
1117#else /* !MSDOS_COMPILER */
1118
1119	char *sp;
1120	register char *t1, *t2;
1121	char *term;
1122	char termbuf[TERMBUF_SIZE];
1123
1124	static char sbuf[TERMSBUF_SIZE];
1125
1126#if OS2
1127	/*
1128	 * Make sure the termcap database is available.
1129	 */
1130	sp = lgetenv("TERMCAP");
1131	if (sp == NULL || *sp == '\0')
1132	{
1133		char *termcap;
1134		if ((sp = homefile("termcap.dat")) != NULL)
1135		{
1136			termcap = (char *) ecalloc(strlen(sp)+9, sizeof(char));
1137			sprintf(termcap, "TERMCAP=%s", sp);
1138			free(sp);
1139			putenv(termcap);
1140		}
1141	}
1142#endif
1143	/*
1144	 * Find out what kind of terminal this is.
1145	 */
1146 	if ((term = lgetenv("TERM")) == NULL)
1147 		term = DEFAULT_TERM;
1148	hardcopy = 0;
1149 	if (tgetent(termbuf, term) != TGETENT_OK)
1150 		hardcopy = 1;
1151 	if (ltgetflag("hc"))
1152		hardcopy = 1;
1153
1154	/*
1155	 * Get size of the screen.
1156	 */
1157	scrsize();
1158	pos_init();
1159
1160	auto_wrap = ltgetflag("am");
1161	ignaw = ltgetflag("xn");
1162	above_mem = ltgetflag("da");
1163	below_mem = ltgetflag("db");
1164	clear_bg = ltgetflag("ut");
1165
1166	/*
1167	 * Assumes termcap variable "sg" is the printing width of:
1168	 * the standout sequence, the end standout sequence,
1169	 * the underline sequence, the end underline sequence,
1170	 * the boldface sequence, and the end boldface sequence.
1171	 */
1172	if ((so_s_width = ltgetnum("sg")) < 0)
1173		so_s_width = 0;
1174	so_e_width = so_s_width;
1175
1176	bo_s_width = bo_e_width = so_s_width;
1177	ul_s_width = ul_e_width = so_s_width;
1178	bl_s_width = bl_e_width = so_s_width;
1179
1180#if HILITE_SEARCH
1181	if (so_s_width > 0 || so_e_width > 0)
1182		/*
1183		 * Disable highlighting by default on magic cookie terminals.
1184		 * Turning on highlighting might change the displayed width
1185		 * of a line, causing the display to get messed up.
1186		 * The user can turn it back on with -g,
1187		 * but she won't like the results.
1188		 */
1189		hilite_search = 0;
1190#endif
1191
1192	/*
1193	 * Get various string-valued capabilities.
1194	 */
1195	sp = sbuf;
1196
1197#if HAVE_OSPEED
1198	sc_pad = ltgetstr("pc", &sp);
1199	if (sc_pad != NULL)
1200		PC = *sc_pad;
1201#endif
1202
1203	sc_s_keypad = ltgetstr("ks", &sp);
1204	if (sc_s_keypad == NULL)
1205		sc_s_keypad = "";
1206	sc_e_keypad = ltgetstr("ke", &sp);
1207	if (sc_e_keypad == NULL)
1208		sc_e_keypad = "";
1209
1210	sc_init = ltgetstr("ti", &sp);
1211	if (sc_init == NULL)
1212		sc_init = "";
1213
1214	sc_deinit= ltgetstr("te", &sp);
1215	if (sc_deinit == NULL)
1216		sc_deinit = "";
1217
1218	sc_eol_clear = ltgetstr("ce", &sp);
1219	if (sc_eol_clear == NULL || *sc_eol_clear == '\0')
1220	{
1221		missing_cap = 1;
1222		sc_eol_clear = "";
1223	}
1224
1225	sc_eos_clear = ltgetstr("cd", &sp);
1226	if (below_mem && (sc_eos_clear == NULL || *sc_eos_clear == '\0'))
1227	{
1228		missing_cap = 1;
1229		sc_eos_clear = "";
1230	}
1231
1232	sc_clear = ltgetstr("cl", &sp);
1233	if (sc_clear == NULL || *sc_clear == '\0')
1234	{
1235		missing_cap = 1;
1236		sc_clear = "\n\n";
1237	}
1238
1239	sc_move = ltgetstr("cm", &sp);
1240	if (sc_move == NULL || *sc_move == '\0')
1241	{
1242		/*
1243		 * This is not an error here, because we don't
1244		 * always need sc_move.
1245		 * We need it only if we don't have home or lower-left.
1246		 */
1247		sc_move = "";
1248		can_goto_line = 0;
1249	} else
1250		can_goto_line = 1;
1251
1252	tmodes("so", "se", &sc_s_in, &sc_s_out, "", "", &sp);
1253	tmodes("us", "ue", &sc_u_in, &sc_u_out, sc_s_in, sc_s_out, &sp);
1254	tmodes("md", "me", &sc_b_in, &sc_b_out, sc_s_in, sc_s_out, &sp);
1255	tmodes("mb", "me", &sc_bl_in, &sc_bl_out, sc_s_in, sc_s_out, &sp);
1256
1257	sc_visual_bell = ltgetstr("vb", &sp);
1258	if (sc_visual_bell == NULL)
1259		sc_visual_bell = "";
1260
1261	if (ltgetflag("bs"))
1262		sc_backspace = "\b";
1263	else
1264	{
1265		sc_backspace = ltgetstr("bc", &sp);
1266		if (sc_backspace == NULL || *sc_backspace == '\0')
1267			sc_backspace = "\b";
1268	}
1269
1270	/*
1271	 * Choose between using "ho" and "cm" ("home" and "cursor move")
1272	 * to move the cursor to the upper left corner of the screen.
1273	 */
1274	t1 = ltgetstr("ho", &sp);
1275	if (t1 == NULL)
1276		t1 = "";
1277	if (*sc_move == '\0')
1278		t2 = "";
1279	else
1280	{
1281		strcpy(sp, tgoto(sc_move, 0, 0));
1282		t2 = sp;
1283		sp += strlen(sp) + 1;
1284	}
1285	sc_home = cheaper(t1, t2, "|\b^");
1286
1287	/*
1288	 * Choose between using "ll" and "cm"  ("lower left" and "cursor move")
1289	 * to move the cursor to the lower left corner of the screen.
1290	 */
1291	t1 = ltgetstr("ll", &sp);
1292	if (t1 == NULL)
1293		t1 = "";
1294	if (*sc_move == '\0')
1295		t2 = "";
1296	else
1297	{
1298		strcpy(sp, tgoto(sc_move, 0, sc_height-1));
1299		t2 = sp;
1300		sp += strlen(sp) + 1;
1301	}
1302	sc_lower_left = cheaper(t1, t2, "\r");
1303
1304	/*
1305	 * Get carriage return string.
1306	 */
1307	sc_return = ltgetstr("cr", &sp);
1308	if (sc_return == NULL)
1309		sc_return = "\r";
1310
1311	/*
1312	 * Choose between using "al" or "sr" ("add line" or "scroll reverse")
1313	 * to add a line at the top of the screen.
1314	 */
1315	t1 = ltgetstr("al", &sp);
1316	if (t1 == NULL)
1317		t1 = "";
1318	t2 = ltgetstr("sr", &sp);
1319	if (t2 == NULL)
1320		t2 = "";
1321#if OS2
1322	if (*t1 == '\0' && *t2 == '\0')
1323		sc_addline = "";
1324	else
1325#endif
1326	if (above_mem)
1327		sc_addline = t1;
1328	else
1329		sc_addline = cheaper(t1, t2, "");
1330	if (*sc_addline == '\0')
1331	{
1332		/*
1333		 * Force repaint on any backward movement.
1334		 */
1335		no_back_scroll = 1;
1336	}
1337#endif /* MSDOS_COMPILER */
1338}
1339
1340#if !MSDOS_COMPILER
1341/*
1342 * Return the cost of displaying a termcap string.
1343 * We use the trick of calling tputs, but as a char printing function
1344 * we give it inc_costcount, which just increments "costcount".
1345 * This tells us how many chars would be printed by using this string.
1346 * {{ Couldn't we just use strlen? }}
1347 */
1348static int costcount;
1349
1350/*ARGSUSED*/
1351	static int
1352inc_costcount(c)
1353	int c;
1354{
1355	costcount++;
1356	return (c);
1357}
1358
1359	static int
1360cost(t)
1361	char *t;
1362{
1363	costcount = 0;
1364	tputs(t, sc_height, inc_costcount);
1365	return (costcount);
1366}
1367
1368/*
1369 * Return the "best" of the two given termcap strings.
1370 * The best, if both exist, is the one with the lower
1371 * cost (see cost() function).
1372 */
1373	static char *
1374cheaper(t1, t2, def)
1375	char *t1, *t2;
1376	char *def;
1377{
1378	if (*t1 == '\0' && *t2 == '\0')
1379	{
1380		missing_cap = 1;
1381		return (def);
1382	}
1383	if (*t1 == '\0')
1384		return (t2);
1385	if (*t2 == '\0')
1386		return (t1);
1387	if (cost(t1) < cost(t2))
1388		return (t1);
1389	return (t2);
1390}
1391
1392	static void
1393tmodes(incap, outcap, instr, outstr, def_instr, def_outstr, spp)
1394	char *incap;
1395	char *outcap;
1396	char **instr;
1397	char **outstr;
1398	char *def_instr;
1399	char *def_outstr;
1400	char **spp;
1401{
1402	*instr = ltgetstr(incap, spp);
1403	if (*instr == NULL)
1404	{
1405		/* Use defaults. */
1406		*instr = def_instr;
1407		*outstr = def_outstr;
1408		return;
1409	}
1410
1411	*outstr = ltgetstr(outcap, spp);
1412	if (*outstr == NULL)
1413		/* No specific out capability; use "me". */
1414		*outstr = ltgetstr("me", spp);
1415	if (*outstr == NULL)
1416		/* Don't even have "me"; use a null string. */
1417		*outstr = "";
1418}
1419
1420#endif /* MSDOS_COMPILER */
1421
1422
1423/*
1424 * Below are the functions which perform all the
1425 * terminal-specific screen manipulation.
1426 */
1427
1428
1429#if MSDOS_COMPILER
1430
1431#if MSDOS_COMPILER==WIN32C
1432	static void
1433_settextposition(int row, int col)
1434{
1435	COORD cpos;
1436	CONSOLE_SCREEN_BUFFER_INFO csbi;
1437
1438	GetConsoleScreenBufferInfo(con_out, &csbi);
1439	cpos.X = csbi.srWindow.Left + (col - 1);
1440	cpos.Y = csbi.srWindow.Top + (row - 1);
1441	SetConsoleCursorPosition(con_out, cpos);
1442}
1443#endif
1444
1445/*
1446 * Initialize the screen to the correct color at startup.
1447 */
1448	static void
1449initcolor()
1450{
1451	SETCOLORS(nm_fg_color, nm_bg_color);
1452#if 0
1453	/*
1454	 * This clears the screen at startup.  This is different from
1455	 * the behavior of other versions of less.  Disable it for now.
1456	 */
1457	char *blanks;
1458	int row;
1459	int col;
1460
1461	/*
1462	 * Create a complete, blank screen using "normal" colors.
1463	 */
1464	SETCOLORS(nm_fg_color, nm_bg_color);
1465	blanks = (char *) ecalloc(width+1, sizeof(char));
1466	for (col = 0;  col < sc_width;  col++)
1467		blanks[col] = ' ';
1468	blanks[sc_width] = '\0';
1469	for (row = 0;  row < sc_height;  row++)
1470		_outtext(blanks);
1471	free(blanks);
1472#endif
1473}
1474#endif
1475
1476#if MSDOS_COMPILER==WIN32C
1477
1478/*
1479 * Termcap-like init with a private win32 console.
1480 */
1481	static void
1482win32_init_term()
1483{
1484	CONSOLE_SCREEN_BUFFER_INFO scr;
1485	COORD size;
1486
1487	if (con_out_save == INVALID_HANDLE_VALUE)
1488		return;
1489
1490	GetConsoleScreenBufferInfo(con_out_save, &scr);
1491
1492	if (con_out_ours == INVALID_HANDLE_VALUE)
1493	{
1494		/*
1495		 * Create our own screen buffer, so that we
1496		 * may restore the original when done.
1497		 */
1498		con_out_ours = CreateConsoleScreenBuffer(
1499			GENERIC_WRITE | GENERIC_READ,
1500			FILE_SHARE_WRITE | FILE_SHARE_READ,
1501			(LPSECURITY_ATTRIBUTES) NULL,
1502			CONSOLE_TEXTMODE_BUFFER,
1503			(LPVOID) NULL);
1504	}
1505
1506	size.X = scr.srWindow.Right - scr.srWindow.Left + 1;
1507	size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1;
1508	SetConsoleScreenBufferSize(con_out_ours, size);
1509	SetConsoleActiveScreenBuffer(con_out_ours);
1510	con_out = con_out_ours;
1511}
1512
1513/*
1514 * Restore the startup console.
1515 */
1516static void
1517win32_deinit_term()
1518{
1519	if (con_out_save == INVALID_HANDLE_VALUE)
1520		return;
1521	if (quitting)
1522		(void) CloseHandle(con_out_ours);
1523	SetConsoleActiveScreenBuffer(con_out_save);
1524	con_out = con_out_save;
1525}
1526
1527#endif
1528
1529/*
1530 * Initialize terminal
1531 */
1532	public void
1533init()
1534{
1535#if !MSDOS_COMPILER
1536	if (!no_init)
1537		tputs(sc_init, sc_height, putchr);
1538	if (!no_keypad)
1539		tputs(sc_s_keypad, sc_height, putchr);
1540	if (top_scroll)
1541	{
1542		int i;
1543
1544		/*
1545		 * This is nice to terminals with no alternate screen,
1546		 * but with saved scrolled-off-the-top lines.  This way,
1547		 * no previous line is lost, but we start with a whole
1548		 * screen to ourself.
1549		 */
1550		for (i = 1; i < sc_height; i++)
1551			putchr('\n');
1552	} else
1553		line_left();
1554#else
1555#if MSDOS_COMPILER==WIN32C
1556	if (!no_init)
1557		win32_init_term();
1558#endif
1559	initcolor();
1560	flush();
1561#endif
1562	init_done = 1;
1563}
1564
1565/*
1566 * Deinitialize terminal
1567 */
1568	public void
1569deinit()
1570{
1571	if (!init_done)
1572		return;
1573#if !MSDOS_COMPILER
1574	if (!no_keypad)
1575		tputs(sc_e_keypad, sc_height, putchr);
1576	if (!no_init)
1577		tputs(sc_deinit, sc_height, putchr);
1578#else
1579	/* Restore system colors. */
1580	SETCOLORS(sy_fg_color, sy_bg_color);
1581#if MSDOS_COMPILER==WIN32C
1582	if (!no_init)
1583		win32_deinit_term();
1584#else
1585	/* Need clreol to make SETCOLORS take effect. */
1586	clreol();
1587#endif
1588#endif
1589	init_done = 0;
1590}
1591
1592/*
1593 * Home cursor (move to upper left corner of screen).
1594 */
1595	public void
1596home()
1597{
1598#if !MSDOS_COMPILER
1599	tputs(sc_home, 1, putchr);
1600#else
1601	flush();
1602	_settextposition(1,1);
1603#endif
1604}
1605
1606/*
1607 * Add a blank line (called with cursor at home).
1608 * Should scroll the display down.
1609 */
1610	public void
1611add_line()
1612{
1613#if !MSDOS_COMPILER
1614	tputs(sc_addline, sc_height, putchr);
1615#else
1616	flush();
1617#if MSDOS_COMPILER==MSOFTC
1618	_scrolltextwindow(_GSCROLLDOWN);
1619	_settextposition(1,1);
1620#else
1621#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1622	movetext(1,1, sc_width,sc_height-1, 1,2);
1623	gotoxy(1,1);
1624	clreol();
1625#else
1626#if MSDOS_COMPILER==WIN32C
1627    {
1628	CHAR_INFO fillchar;
1629	SMALL_RECT rcSrc, rcClip;
1630	COORD new_org;
1631	CONSOLE_SCREEN_BUFFER_INFO csbi;
1632
1633	GetConsoleScreenBufferInfo(con_out,&csbi);
1634
1635	/* The clip rectangle is the entire visible screen. */
1636	rcClip.Left = csbi.srWindow.Left;
1637	rcClip.Top = csbi.srWindow.Top;
1638	rcClip.Right = csbi.srWindow.Right;
1639	rcClip.Bottom = csbi.srWindow.Bottom;
1640
1641	/* The source rectangle is the visible screen minus the last line. */
1642	rcSrc = rcClip;
1643	rcSrc.Bottom--;
1644
1645	/* Move the top left corner of the source window down one row. */
1646	new_org.X = rcSrc.Left;
1647	new_org.Y = rcSrc.Top + 1;
1648
1649	/* Fill the right character and attributes. */
1650	fillchar.Char.AsciiChar = ' ';
1651	curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
1652	fillchar.Attributes = curr_attr;
1653	ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
1654	_settextposition(1,1);
1655    }
1656#endif
1657#endif
1658#endif
1659#endif
1660}
1661
1662#if 0
1663/*
1664 * Remove the n topmost lines and scroll everything below it in the
1665 * window upward.  This is needed to stop leaking the topmost line
1666 * into the scrollback buffer when we go down-one-line (in WIN32).
1667 */
1668	public void
1669remove_top(n)
1670	int n;
1671{
1672#if MSDOS_COMPILER==WIN32C
1673	SMALL_RECT rcSrc, rcClip;
1674	CHAR_INFO fillchar;
1675	COORD new_org;
1676	CONSOLE_SCREEN_BUFFER_INFO csbi; /* to get buffer info */
1677
1678	if (n >= sc_height - 1)
1679	{
1680		clear();
1681		home();
1682		return;
1683	}
1684
1685	flush();
1686
1687	GetConsoleScreenBufferInfo(con_out, &csbi);
1688
1689	/* Get the extent of all-visible-rows-but-the-last. */
1690	rcSrc.Left    = csbi.srWindow.Left;
1691	rcSrc.Top     = csbi.srWindow.Top + n;
1692	rcSrc.Right   = csbi.srWindow.Right;
1693	rcSrc.Bottom  = csbi.srWindow.Bottom;
1694
1695	/* Get the clip rectangle. */
1696	rcClip.Left   = rcSrc.Left;
1697	rcClip.Top    = csbi.srWindow.Top;
1698	rcClip.Right  = rcSrc.Right;
1699	rcClip.Bottom = rcSrc.Bottom ;
1700
1701	/* Move the source window up n rows. */
1702	new_org.X = rcSrc.Left;
1703	new_org.Y = rcSrc.Top - n;
1704
1705	/* Fill the right character and attributes. */
1706	fillchar.Char.AsciiChar = ' ';
1707	curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
1708	fillchar.Attributes = curr_attr;
1709
1710	ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
1711
1712	/* Position cursor on first blank line. */
1713	goto_line(sc_height - n - 1);
1714#endif
1715}
1716#endif
1717
1718#if MSDOS_COMPILER==WIN32C
1719/*
1720 * Clear the screen.
1721 */
1722	static void
1723win32_clear()
1724{
1725	/*
1726	 * This will clear only the currently visible rows of the NT
1727	 * console buffer, which means none of the precious scrollback
1728	 * rows are touched making for faster scrolling.  Note that, if
1729	 * the window has fewer columns than the console buffer (i.e.
1730	 * there is a horizontal scrollbar as well), the entire width
1731	 * of the visible rows will be cleared.
1732	 */
1733	COORD topleft;
1734	DWORD nchars;
1735	DWORD winsz;
1736	CONSOLE_SCREEN_BUFFER_INFO csbi;
1737
1738	/* get the number of cells in the current buffer */
1739	GetConsoleScreenBufferInfo(con_out, &csbi);
1740	winsz = csbi.dwSize.X * (csbi.srWindow.Bottom - csbi.srWindow.Top + 1);
1741	topleft.X = 0;
1742	topleft.Y = csbi.srWindow.Top;
1743
1744	curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
1745	FillConsoleOutputCharacter(con_out, ' ', winsz, topleft, &nchars);
1746	FillConsoleOutputAttribute(con_out, curr_attr, winsz, topleft, &nchars);
1747}
1748
1749/*
1750 * Remove the n topmost lines and scroll everything below it in the
1751 * window upward.
1752 */
1753	public void
1754win32_scroll_up(n)
1755	int n;
1756{
1757	SMALL_RECT rcSrc, rcClip;
1758	CHAR_INFO fillchar;
1759	COORD topleft;
1760	COORD new_org;
1761	DWORD nchars;
1762	DWORD size;
1763	CONSOLE_SCREEN_BUFFER_INFO csbi;
1764
1765	if (n <= 0)
1766		return;
1767
1768	if (n >= sc_height - 1)
1769	{
1770		win32_clear();
1771		_settextposition(1,1);
1772		return;
1773	}
1774
1775	/* Get the extent of what will remain visible after scrolling. */
1776	GetConsoleScreenBufferInfo(con_out, &csbi);
1777	rcSrc.Left    = csbi.srWindow.Left;
1778	rcSrc.Top     = csbi.srWindow.Top + n;
1779	rcSrc.Right   = csbi.srWindow.Right;
1780	rcSrc.Bottom  = csbi.srWindow.Bottom;
1781
1782	/* Get the clip rectangle. */
1783	rcClip.Left   = rcSrc.Left;
1784	rcClip.Top    = csbi.srWindow.Top;
1785	rcClip.Right  = rcSrc.Right;
1786	rcClip.Bottom = rcSrc.Bottom ;
1787
1788	/* Move the source text to the top of the screen. */
1789	new_org.X = rcSrc.Left;
1790	new_org.Y = rcClip.Top;
1791
1792	/* Fill the right character and attributes. */
1793	fillchar.Char.AsciiChar = ' ';
1794	fillchar.Attributes = MAKEATTR(nm_fg_color, nm_bg_color);
1795
1796	/* Scroll the window. */
1797	SetConsoleTextAttribute(con_out, fillchar.Attributes);
1798	ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
1799
1800	/* Clear remaining lines at bottom. */
1801	topleft.X = csbi.dwCursorPosition.X;
1802	topleft.Y = rcSrc.Bottom - n;
1803	size = (n * csbi.dwSize.X) + (rcSrc.Right - topleft.X);
1804	FillConsoleOutputCharacter(con_out, ' ', size, topleft,
1805		&nchars);
1806	FillConsoleOutputAttribute(con_out, fillchar.Attributes, size, topleft,
1807		&nchars);
1808	SetConsoleTextAttribute(con_out, curr_attr);
1809
1810	/* Move cursor n lines up from where it was. */
1811	csbi.dwCursorPosition.Y -= n;
1812	SetConsoleCursorPosition(con_out, csbi.dwCursorPosition);
1813}
1814#endif
1815
1816/*
1817 * Move cursor to lower left corner of screen.
1818 */
1819	public void
1820lower_left()
1821{
1822#if !MSDOS_COMPILER
1823	tputs(sc_lower_left, 1, putchr);
1824#else
1825	flush();
1826	_settextposition(sc_height, 1);
1827#endif
1828}
1829
1830/*
1831 * Move cursor to left position of current line.
1832 */
1833	public void
1834line_left()
1835{
1836#if !MSDOS_COMPILER
1837	tputs(sc_return, 1, putchr);
1838#else
1839	int row;
1840	flush();
1841#if MSDOS_COMPILER==WIN32C
1842	{
1843		CONSOLE_SCREEN_BUFFER_INFO scr;
1844		GetConsoleScreenBufferInfo(con_out, &scr);
1845		row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1;
1846	}
1847#else
1848#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1849		row = wherey();
1850#else
1851	{
1852		struct rccoord tpos = _gettextposition();
1853		row = tpos.row;
1854	}
1855#endif
1856#endif
1857	_settextposition(row, 1);
1858#endif
1859}
1860
1861/*
1862 * Check if the console size has changed and reset internals
1863 * (in lieu of SIGWINCH for WIN32).
1864 */
1865	public void
1866check_winch()
1867{
1868#if MSDOS_COMPILER==WIN32C
1869	CONSOLE_SCREEN_BUFFER_INFO scr;
1870	COORD size;
1871
1872	if (con_out == INVALID_HANDLE_VALUE)
1873		return;
1874
1875	flush();
1876	GetConsoleScreenBufferInfo(con_out, &scr);
1877	size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1;
1878	size.X = scr.srWindow.Right - scr.srWindow.Left + 1;
1879	if (size.Y != sc_height || size.X != sc_width)
1880	{
1881		sc_height = size.Y;
1882		sc_width = size.X;
1883		if (!no_init && con_out_ours == con_out)
1884			SetConsoleScreenBufferSize(con_out, size);
1885		pos_init();
1886		wscroll = (sc_height + 1) / 2;
1887		screen_trashed = 1;
1888	}
1889#endif
1890}
1891
1892/*
1893 * Goto a specific line on the screen.
1894 */
1895	public void
1896goto_line(slinenum)
1897	int slinenum;
1898{
1899#if !MSDOS_COMPILER
1900	tputs(tgoto(sc_move, 0, slinenum), 1, putchr);
1901#else
1902	flush();
1903	_settextposition(slinenum+1, 1);
1904#endif
1905}
1906
1907#if MSDOS_COMPILER==MSOFTC || MSDOS_COMPILER==BORLANDC
1908/*
1909 * Create an alternate screen which is all white.
1910 * This screen is used to create a "flash" effect, by displaying it
1911 * briefly and then switching back to the normal screen.
1912 * {{ Yuck!  There must be a better way to get a visual bell. }}
1913 */
1914	static void
1915create_flash()
1916{
1917#if MSDOS_COMPILER==MSOFTC
1918	struct videoconfig w;
1919	char *blanks;
1920	int row, col;
1921
1922	_getvideoconfig(&w);
1923	videopages = w.numvideopages;
1924	if (videopages < 2)
1925	{
1926		at_enter(AT_STANDOUT);
1927		at_exit();
1928	} else
1929	{
1930		_setactivepage(1);
1931		at_enter(AT_STANDOUT);
1932		blanks = (char *) ecalloc(w.numtextcols, sizeof(char));
1933		for (col = 0;  col < w.numtextcols;  col++)
1934			blanks[col] = ' ';
1935		for (row = w.numtextrows;  row > 0;  row--)
1936			_outmem(blanks, w.numtextcols);
1937		_setactivepage(0);
1938		_setvisualpage(0);
1939		free(blanks);
1940		at_exit();
1941	}
1942#else
1943#if MSDOS_COMPILER==BORLANDC
1944	register int n;
1945
1946	whitescreen = (unsigned short *)
1947		malloc(sc_width * sc_height * sizeof(short));
1948	if (whitescreen == NULL)
1949		return;
1950	for (n = 0;  n < sc_width * sc_height;  n++)
1951		whitescreen[n] = 0x7020;
1952#else
1953#if MSDOS_COMPILER==WIN32C
1954	register int n;
1955
1956	whitescreen = (WORD *)
1957		malloc(sc_height * sc_width * sizeof(WORD));
1958	if (whitescreen == NULL)
1959		return;
1960	/* Invert the standard colors. */
1961	for (n = 0;  n < sc_width * sc_height;  n++)
1962		whitescreen[n] = (WORD)((nm_fg_color << 4) | nm_bg_color);
1963#endif
1964#endif
1965#endif
1966	flash_created = 1;
1967}
1968#endif /* MSDOS_COMPILER */
1969
1970/*
1971 * Output the "visual bell", if there is one.
1972 */
1973	public void
1974vbell()
1975{
1976#if !MSDOS_COMPILER
1977	if (*sc_visual_bell == '\0')
1978		return;
1979	tputs(sc_visual_bell, sc_height, putchr);
1980#else
1981#if MSDOS_COMPILER==DJGPPC
1982	ScreenVisualBell();
1983#else
1984#if MSDOS_COMPILER==MSOFTC
1985	/*
1986	 * Create a flash screen on the second video page.
1987	 * Switch to that page, then switch back.
1988	 */
1989	if (!flash_created)
1990		create_flash();
1991	if (videopages < 2)
1992		return;
1993	_setvisualpage(1);
1994	delay(100);
1995	_setvisualpage(0);
1996#else
1997#if MSDOS_COMPILER==BORLANDC
1998	unsigned short *currscreen;
1999
2000	/*
2001	 * Get a copy of the current screen.
2002	 * Display the flash screen.
2003	 * Then restore the old screen.
2004	 */
2005	if (!flash_created)
2006		create_flash();
2007	if (whitescreen == NULL)
2008		return;
2009	currscreen = (unsigned short *)
2010		malloc(sc_width * sc_height * sizeof(short));
2011	if (currscreen == NULL) return;
2012	gettext(1, 1, sc_width, sc_height, currscreen);
2013	puttext(1, 1, sc_width, sc_height, whitescreen);
2014	delay(100);
2015	puttext(1, 1, sc_width, sc_height, currscreen);
2016	free(currscreen);
2017#else
2018#if MSDOS_COMPILER==WIN32C
2019	/* paint screen with an inverse color */
2020	clear();
2021
2022	/* leave it displayed for 100 msec. */
2023	Sleep(100);
2024
2025	/* restore with a redraw */
2026	repaint();
2027#endif
2028#endif
2029#endif
2030#endif
2031#endif
2032}
2033
2034/*
2035 * Make a noise.
2036 */
2037	static void
2038beep()
2039{
2040#if !MSDOS_COMPILER
2041	putchr(CONTROL('G'));
2042#else
2043#if MSDOS_COMPILER==WIN32C
2044	MessageBeep(0);
2045#else
2046	write(1, "\7", 1);
2047#endif
2048#endif
2049}
2050
2051/*
2052 * Ring the terminal bell.
2053 */
2054	public void
2055bell()
2056{
2057	if (quiet == VERY_QUIET)
2058		vbell();
2059	else
2060		beep();
2061}
2062
2063/*
2064 * Clear the screen.
2065 */
2066	public void
2067clear()
2068{
2069#if !MSDOS_COMPILER
2070	tputs(sc_clear, sc_height, putchr);
2071#else
2072	flush();
2073#if MSDOS_COMPILER==WIN32C
2074	win32_clear();
2075#else
2076	_clearscreen(_GCLEARSCREEN);
2077#endif
2078#endif
2079}
2080
2081/*
2082 * Clear from the cursor to the end of the cursor's line.
2083 * {{ This must not move the cursor. }}
2084 */
2085	public void
2086clear_eol()
2087{
2088#if !MSDOS_COMPILER
2089	tputs(sc_eol_clear, 1, putchr);
2090#else
2091#if MSDOS_COMPILER==MSOFTC
2092	short top, left;
2093	short bot, right;
2094	struct rccoord tpos;
2095
2096	flush();
2097	/*
2098	 * Save current state.
2099	 */
2100	tpos = _gettextposition();
2101	_gettextwindow(&top, &left, &bot, &right);
2102	/*
2103	 * Set a temporary window to the current line,
2104	 * from the cursor's position to the right edge of the screen.
2105	 * Then clear that window.
2106	 */
2107	_settextwindow(tpos.row, tpos.col, tpos.row, sc_width);
2108	_clearscreen(_GWINDOW);
2109	/*
2110	 * Restore state.
2111	 */
2112	_settextwindow(top, left, bot, right);
2113	_settextposition(tpos.row, tpos.col);
2114#else
2115#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
2116	flush();
2117	clreol();
2118#else
2119#if MSDOS_COMPILER==WIN32C
2120	DWORD           nchars;
2121	COORD           cpos;
2122	CONSOLE_SCREEN_BUFFER_INFO scr;
2123
2124	flush();
2125	memset(&scr, 0, sizeof(scr));
2126	GetConsoleScreenBufferInfo(con_out, &scr);
2127	cpos.X = scr.dwCursorPosition.X;
2128	cpos.Y = scr.dwCursorPosition.Y;
2129	curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
2130	FillConsoleOutputAttribute(con_out, curr_attr,
2131		scr.dwSize.X - cpos.X, cpos, &nchars);
2132	FillConsoleOutputCharacter(con_out, ' ',
2133		scr.dwSize.X - cpos.X, cpos, &nchars);
2134#endif
2135#endif
2136#endif
2137#endif
2138}
2139
2140/*
2141 * Clear the current line.
2142 * Clear the screen if there's off-screen memory below the display.
2143 */
2144	static void
2145clear_eol_bot()
2146{
2147#if MSDOS_COMPILER
2148	clear_eol();
2149#else
2150	if (below_mem)
2151		tputs(sc_eos_clear, 1, putchr);
2152	else
2153		tputs(sc_eol_clear, 1, putchr);
2154#endif
2155}
2156
2157/*
2158 * Clear the bottom line of the display.
2159 * Leave the cursor at the beginning of the bottom line.
2160 */
2161	public void
2162clear_bot()
2163{
2164	/*
2165	 * If we're in a non-normal attribute mode, temporarily exit
2166	 * the mode while we do the clear.  Some terminals fill the
2167	 * cleared area with the current attribute.
2168	 */
2169	if (oldbot)
2170		lower_left();
2171	else
2172		line_left();
2173
2174	if (attrmode == AT_NORMAL)
2175		clear_eol_bot();
2176	else
2177	{
2178		int saved_attrmode = attrmode;
2179
2180		at_exit();
2181		clear_eol_bot();
2182		at_enter(saved_attrmode);
2183	}
2184}
2185
2186	public void
2187at_enter(attr)
2188	int attr;
2189{
2190	attr = apply_at_specials(attr);
2191
2192#if !MSDOS_COMPILER
2193	/* The one with the most priority is last.  */
2194	if (attr & AT_UNDERLINE)
2195		tputs(sc_u_in, 1, putchr);
2196	if (attr & AT_BOLD)
2197		tputs(sc_b_in, 1, putchr);
2198	if (attr & AT_BLINK)
2199		tputs(sc_bl_in, 1, putchr);
2200	if (attr & AT_STANDOUT)
2201		tputs(sc_s_in, 1, putchr);
2202#else
2203	flush();
2204	/* The one with the most priority is first.  */
2205	if (attr & AT_STANDOUT)
2206	{
2207		SETCOLORS(so_fg_color, so_bg_color);
2208	} else if (attr & AT_BLINK)
2209	{
2210		SETCOLORS(bl_fg_color, bl_bg_color);
2211	}
2212	else if (attr & AT_BOLD)
2213	{
2214		SETCOLORS(bo_fg_color, bo_bg_color);
2215	}
2216	else if (attr & AT_UNDERLINE)
2217	{
2218		SETCOLORS(ul_fg_color, ul_bg_color);
2219	}
2220#endif
2221
2222	attrmode = attr;
2223}
2224
2225	public void
2226at_exit()
2227{
2228#if !MSDOS_COMPILER
2229	/* Undo things in the reverse order we did them.  */
2230	if (attrmode & AT_STANDOUT)
2231		tputs(sc_s_out, 1, putchr);
2232	if (attrmode & AT_BLINK)
2233		tputs(sc_bl_out, 1, putchr);
2234	if (attrmode & AT_BOLD)
2235		tputs(sc_b_out, 1, putchr);
2236	if (attrmode & AT_UNDERLINE)
2237		tputs(sc_u_out, 1, putchr);
2238#else
2239	flush();
2240	SETCOLORS(nm_fg_color, nm_bg_color);
2241#endif
2242
2243	attrmode = AT_NORMAL;
2244}
2245
2246	public void
2247at_switch(attr)
2248	int attr;
2249{
2250	int new_attrmode = apply_at_specials(attr);
2251	int ignore_modes = AT_ANSI;
2252
2253	if ((new_attrmode & ~ignore_modes) != (attrmode & ~ignore_modes))
2254	{
2255		at_exit();
2256		at_enter(attr);
2257	}
2258}
2259
2260	public int
2261is_at_equiv(attr1, attr2)
2262	int attr1;
2263	int attr2;
2264{
2265	attr1 = apply_at_specials(attr1);
2266	attr2 = apply_at_specials(attr2);
2267
2268	return (attr1 == attr2);
2269}
2270
2271	public int
2272apply_at_specials(attr)
2273	int attr;
2274{
2275	if (attr & AT_BINARY)
2276		attr |= binattr;
2277	if (attr & AT_HILITE)
2278		attr |= AT_STANDOUT;
2279	attr &= ~(AT_BINARY|AT_HILITE);
2280
2281	return attr;
2282}
2283
2284#if 0 /* No longer used */
2285/*
2286 * Erase the character to the left of the cursor
2287 * and move the cursor left.
2288 */
2289	public void
2290backspace()
2291{
2292#if !MSDOS_COMPILER
2293	/*
2294	 * Erase the previous character by overstriking with a space.
2295	 */
2296	tputs(sc_backspace, 1, putchr);
2297	putchr(' ');
2298	tputs(sc_backspace, 1, putchr);
2299#else
2300#if MSDOS_COMPILER==MSOFTC
2301	struct rccoord tpos;
2302
2303	flush();
2304	tpos = _gettextposition();
2305	if (tpos.col <= 1)
2306		return;
2307	_settextposition(tpos.row, tpos.col-1);
2308	_outtext(" ");
2309	_settextposition(tpos.row, tpos.col-1);
2310#else
2311#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
2312	cputs("\b");
2313#else
2314#if MSDOS_COMPILER==WIN32C
2315	COORD cpos;
2316	DWORD cChars;
2317	CONSOLE_SCREEN_BUFFER_INFO scr;
2318
2319	flush();
2320	GetConsoleScreenBufferInfo(con_out, &scr);
2321	cpos = scr.dwCursorPosition;
2322	if (cpos.X <= 0)
2323		return;
2324	cpos.X--;
2325	SetConsoleCursorPosition(con_out, cpos);
2326	FillConsoleOutputCharacter(con_out, (TCHAR)' ', 1, cpos, &cChars);
2327	SetConsoleCursorPosition(con_out, cpos);
2328#endif
2329#endif
2330#endif
2331#endif
2332}
2333#endif /* 0 */
2334
2335/*
2336 * Output a plain backspace, without erasing the previous char.
2337 */
2338	public void
2339putbs()
2340{
2341#if !MSDOS_COMPILER
2342	tputs(sc_backspace, 1, putchr);
2343#else
2344	int row, col;
2345
2346	flush();
2347	{
2348#if MSDOS_COMPILER==MSOFTC
2349		struct rccoord tpos;
2350		tpos = _gettextposition();
2351		row = tpos.row;
2352		col = tpos.col;
2353#else
2354#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
2355		row = wherey();
2356		col = wherex();
2357#else
2358#if MSDOS_COMPILER==WIN32C
2359		CONSOLE_SCREEN_BUFFER_INFO scr;
2360		GetConsoleScreenBufferInfo(con_out, &scr);
2361		row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1;
2362		col = scr.dwCursorPosition.X - scr.srWindow.Left + 1;
2363#endif
2364#endif
2365#endif
2366	}
2367	if (col <= 1)
2368		return;
2369	_settextposition(row, col-1);
2370#endif /* MSDOS_COMPILER */
2371}
2372
2373#if MSDOS_COMPILER==WIN32C
2374/*
2375 * Determine whether an input character is waiting to be read.
2376 */
2377	static int
2378win32_kbhit(tty)
2379	HANDLE tty;
2380{
2381	INPUT_RECORD ip;
2382	DWORD read;
2383
2384	if (keyCount > 0)
2385		return (TRUE);
2386
2387	currentKey.ascii = 0;
2388	currentKey.scan = 0;
2389
2390	/*
2391	 * Wait for a real key-down event, but
2392	 * ignore SHIFT and CONTROL key events.
2393	 */
2394	do
2395	{
2396		PeekConsoleInput(tty, &ip, 1, &read);
2397		if (read == 0)
2398			return (FALSE);
2399		ReadConsoleInput(tty, &ip, 1, &read);
2400	} while (ip.EventType != KEY_EVENT ||
2401		ip.Event.KeyEvent.bKeyDown != TRUE ||
2402		ip.Event.KeyEvent.wVirtualScanCode == 0 ||
2403		ip.Event.KeyEvent.wVirtualKeyCode == VK_SHIFT ||
2404		ip.Event.KeyEvent.wVirtualKeyCode == VK_CONTROL ||
2405		ip.Event.KeyEvent.wVirtualKeyCode == VK_MENU);
2406
2407	currentKey.ascii = ip.Event.KeyEvent.uChar.AsciiChar;
2408	currentKey.scan = ip.Event.KeyEvent.wVirtualScanCode;
2409	keyCount = ip.Event.KeyEvent.wRepeatCount;
2410
2411	if (ip.Event.KeyEvent.dwControlKeyState &
2412		(LEFT_ALT_PRESSED | RIGHT_ALT_PRESSED))
2413	{
2414		switch (currentKey.scan)
2415		{
2416		case PCK_ALT_E:     /* letter 'E' */
2417			currentKey.ascii = 0;
2418			break;
2419		}
2420	} else if (ip.Event.KeyEvent.dwControlKeyState &
2421		(LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED))
2422	{
2423		switch (currentKey.scan)
2424		{
2425		case PCK_RIGHT: /* right arrow */
2426			currentKey.scan = PCK_CTL_RIGHT;
2427			break;
2428		case PCK_LEFT: /* left arrow */
2429			currentKey.scan = PCK_CTL_LEFT;
2430			break;
2431		case PCK_DELETE: /* delete */
2432			currentKey.scan = PCK_CTL_DELETE;
2433			break;
2434		}
2435	}
2436	return (TRUE);
2437}
2438
2439/*
2440 * Read a character from the keyboard.
2441 */
2442	public char
2443WIN32getch(tty)
2444	int tty;
2445{
2446	int ascii;
2447
2448	if (pending_scancode)
2449	{
2450		pending_scancode = 0;
2451		return ((char)(currentKey.scan & 0x00FF));
2452	}
2453
2454	while (win32_kbhit((HANDLE)tty) == FALSE)
2455	{
2456		Sleep(20);
2457		if (ABORT_SIGS())
2458			return ('\003');
2459		continue;
2460	}
2461	keyCount --;
2462	ascii = currentKey.ascii;
2463	/*
2464	 * On PC's, the extended keys return a 2 byte sequence beginning
2465	 * with '00', so if the ascii code is 00, the next byte will be
2466	 * the lsb of the scan code.
2467	 */
2468	pending_scancode = (ascii == 0x00);
2469	return ((char)ascii);
2470}
2471#endif
2472
2473#if MSDOS_COMPILER
2474/*
2475 */
2476	public void
2477WIN32setcolors(fg, bg)
2478	int fg;
2479	int bg;
2480{
2481	SETCOLORS(fg, bg);
2482}
2483
2484/*
2485 */
2486	public void
2487WIN32textout(text, len)
2488	char *text;
2489	int len;
2490{
2491#if MSDOS_COMPILER==WIN32C
2492	DWORD written;
2493	WriteConsole(con_out, text, len, &written, NULL);
2494#else
2495	char c = text[len];
2496	text[len] = '\0';
2497	cputs(text);
2498	text[len] = c;
2499#endif
2500}
2501#endif
2502