1/*
2 * Copyright (C) 1984-2007  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 about less, or for information on how to
8 * contact the author, see the README file.
9 */
10
11
12/*
13 * Routines which deal with the characteristics of the terminal.
14 * Uses termcap to be as terminal-independent as possible.
15 */
16
17#include "less.h"
18#include "cmd.h"
19
20#if MSDOS_COMPILER
21#include "pckeys.h"
22#if MSDOS_COMPILER==MSOFTC
23#include <graph.h>
24#else
25#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
26#include <conio.h>
27#if MSDOS_COMPILER==DJGPPC
28#include <pc.h>
29extern int fd0;
30#endif
31#else
32#if MSDOS_COMPILER==WIN32C
33#include <windows.h>
34#endif
35#endif
36#endif
37#include <time.h>
38
39#else
40
41#if HAVE_SYS_IOCTL_H
42#include <sys/ioctl.h>
43#endif
44
45#if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS
46#include <termios.h>
47#else
48#if HAVE_TERMIO_H
49#include <termio.h>
50#else
51#if HAVE_SGSTAT_H
52#include <sgstat.h>
53#else
54#include <sgtty.h>
55#endif
56#endif
57#endif
58
59#if HAVE_TERMCAP_H
60#include <termcap.h>
61#endif
62#ifdef _OSK
63#include <signal.h>
64#endif
65#if OS2
66#include <sys/signal.h>
67#include "pckeys.h"
68#endif
69#if HAVE_SYS_STREAM_H
70#include <sys/stream.h>
71#endif
72#if HAVE_SYS_PTEM_H
73#include <sys/ptem.h>
74#endif
75
76#endif /* MSDOS_COMPILER */
77
78/*
79 * Check for broken termios package that forces you to manually
80 * set the line discipline.
81 */
82#ifdef __ultrix__
83#define MUST_SET_LINE_DISCIPLINE 1
84#else
85#define MUST_SET_LINE_DISCIPLINE 0
86#endif
87
88#if OS2
89#define	DEFAULT_TERM		"ansi"
90static char *windowid;
91#else
92#define	DEFAULT_TERM		"unknown"
93#endif
94
95#if MSDOS_COMPILER==MSOFTC
96static int videopages;
97static long msec_loops;
98static int flash_created = 0;
99#define	SETCOLORS(fg,bg)	{ _settextcolor(fg); _setbkcolor(bg); }
100#endif
101
102#if MSDOS_COMPILER==BORLANDC
103static unsigned short *whitescreen;
104static int flash_created = 0;
105#endif
106#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
107#define _settextposition(y,x)   gotoxy(x,y)
108#define _clearscreen(m)         clrscr()
109#define _outtext(s)             cputs(s)
110#define	SETCOLORS(fg,bg)	{ textcolor(fg); textbackground(bg); }
111extern int sc_height;
112#endif
113
114#if MSDOS_COMPILER==WIN32C
115struct keyRecord
116{
117	int ascii;
118	int scan;
119} currentKey;
120
121static int keyCount = 0;
122static WORD curr_attr;
123static int pending_scancode = 0;
124static WORD *whitescreen;
125
126static HANDLE con_out_save = INVALID_HANDLE_VALUE; /* previous console */
127static HANDLE con_out_ours = INVALID_HANDLE_VALUE; /* our own */
128HANDLE con_out = INVALID_HANDLE_VALUE;             /* current console */
129
130extern int quitting;
131static void win32_init_term();
132static void win32_deinit_term();
133
134#define FG_COLORS       (FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_INTENSITY)
135#define BG_COLORS       (BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_INTENSITY)
136#define	MAKEATTR(fg,bg)		((WORD)((fg)|((bg)<<4)))
137#define	SETCOLORS(fg,bg)	{ curr_attr = MAKEATTR(fg,bg); \
138				if (SetConsoleTextAttribute(con_out, curr_attr) == 0) \
139				error("SETCOLORS failed"); }
140#endif
141
142#if MSDOS_COMPILER
143public int nm_fg_color;		/* Color of normal text */
144public int nm_bg_color;
145public int bo_fg_color;		/* Color of bold text */
146public int bo_bg_color;
147public int ul_fg_color;		/* Color of underlined text */
148public int ul_bg_color;
149public int so_fg_color;		/* Color of standout text */
150public int so_bg_color;
151public int bl_fg_color;		/* Color of blinking text */
152public int bl_bg_color;
153static int sy_fg_color;		/* Color of system text (before less) */
154static int sy_bg_color;
155
156#else
157
158/*
159 * Strings passed to tputs() to do various terminal functions.
160 */
161static char
162	*sc_pad,		/* Pad string */
163	*sc_home,		/* Cursor home */
164	*sc_addline,		/* Add line, scroll down following lines */
165	*sc_lower_left,		/* Cursor to last line, first column */
166	*sc_return,		/* Cursor to beginning of current line */
167	*sc_move,		/* General cursor positioning */
168	*sc_clear,		/* Clear screen */
169	*sc_eol_clear,		/* Clear to end of line */
170	*sc_eos_clear,		/* Clear to end of screen */
171	*sc_s_in,		/* Enter standout (highlighted) mode */
172	*sc_s_out,		/* Exit standout mode */
173	*sc_u_in,		/* Enter underline mode */
174	*sc_u_out,		/* Exit underline mode */
175	*sc_b_in,		/* Enter bold mode */
176	*sc_b_out,		/* Exit bold mode */
177	*sc_bl_in,		/* Enter blink mode */
178	*sc_bl_out,		/* Exit blink mode */
179	*sc_visual_bell,	/* Visual bell (flash screen) sequence */
180	*sc_backspace,		/* Backspace cursor */
181	*sc_s_keypad,		/* Start keypad mode */
182	*sc_e_keypad,		/* End keypad mode */
183	*sc_init,		/* Startup terminal initialization */
184	*sc_deinit;		/* Exit terminal de-initialization */
185#endif
186
187static int init_done = 0;
188
189public int auto_wrap;		/* Terminal does \r\n when write past margin */
190public int ignaw;		/* Terminal ignores \n immediately after wrap */
191public int erase_char;		/* The user's erase char */
192public int erase2_char;		/* The user's other erase char */
193public int kill_char;		/* The user's line-kill char */
194public int werase_char;		/* The user's word-erase char */
195public int sc_width, sc_height;	/* Height & width of screen */
196public int bo_s_width, bo_e_width;	/* Printing width of boldface seq */
197public int ul_s_width, ul_e_width;	/* Printing width of underline seq */
198public int so_s_width, so_e_width;	/* Printing width of standout seq */
199public int bl_s_width, bl_e_width;	/* Printing width of blink seq */
200public int above_mem, below_mem;	/* Memory retained above/below screen */
201public int can_goto_line;		/* Can move cursor to any line */
202public int clear_bg;		/* Clear fills with background color */
203public int missing_cap = 0;	/* Some capability is missing */
204
205static int attrmode = AT_NORMAL;
206extern int binattr;
207
208#if !MSDOS_COMPILER
209static char *cheaper();
210static void tmodes();
211#endif
212
213/*
214 * These two variables are sometimes defined in,
215 * and needed by, the termcap library.
216 */
217#if MUST_DEFINE_OSPEED
218extern short ospeed;	/* Terminal output baud rate */
219extern char PC;		/* Pad character */
220#endif
221#ifdef _OSK
222short ospeed;
223char PC_, *UP, *BC;
224#endif
225
226extern int quiet;		/* If VERY_QUIET, use visual bell for bell */
227extern int no_back_scroll;
228extern int swindow;
229extern int no_init;
230extern int no_keypad;
231extern int sigs;
232extern int wscroll;
233extern int screen_trashed;
234extern int tty;
235extern int top_scroll;
236extern int oldbot;
237#if HILITE_SEARCH
238extern int hilite_search;
239#endif
240
241extern char *tgetstr();
242extern char *tgoto();
243
244
245/*
246 * Change terminal to "raw mode", or restore to "normal" mode.
247 * "Raw mode" means
248 *	1. An outstanding read will complete on receipt of a single keystroke.
249 *	2. Input is not echoed.
250 *	3. On output, \n is mapped to \r\n.
251 *	4. \t is NOT expanded into spaces.
252 *	5. Signal-causing characters such as ctrl-C (interrupt),
253 *	   etc. are NOT disabled.
254 * It doesn't matter whether an input \n is mapped to \r, or vice versa.
255 */
256	public void
257raw_mode(on)
258	int on;
259{
260	static int curr_on = 0;
261
262	if (on == curr_on)
263		return;
264	erase2_char = '\b'; /* in case OS doesn't know about erase2 */
265#if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS
266    {
267	struct termios s;
268	static struct termios save_term;
269	static int saved_term = 0;
270
271	if (on)
272	{
273		/*
274		 * Get terminal modes.
275		 */
276		tcgetattr(tty, &s);
277
278		/*
279		 * Save modes and set certain variables dependent on modes.
280		 */
281		if (!saved_term)
282		{
283			save_term = s;
284			saved_term = 1;
285		}
286#if HAVE_OSPEED
287		switch (cfgetospeed(&s))
288		{
289#ifdef B0
290		case B0: ospeed = 0; break;
291#endif
292#ifdef B50
293		case B50: ospeed = 1; break;
294#endif
295#ifdef B75
296		case B75: ospeed = 2; break;
297#endif
298#ifdef B110
299		case B110: ospeed = 3; break;
300#endif
301#ifdef B134
302		case B134: ospeed = 4; break;
303#endif
304#ifdef B150
305		case B150: ospeed = 5; break;
306#endif
307#ifdef B200
308		case B200: ospeed = 6; break;
309#endif
310#ifdef B300
311		case B300: ospeed = 7; break;
312#endif
313#ifdef B600
314		case B600: ospeed = 8; break;
315#endif
316#ifdef B1200
317		case B1200: ospeed = 9; break;
318#endif
319#ifdef B1800
320		case B1800: ospeed = 10; break;
321#endif
322#ifdef B2400
323		case B2400: ospeed = 11; break;
324#endif
325#ifdef B4800
326		case B4800: ospeed = 12; break;
327#endif
328#ifdef B9600
329		case B9600: ospeed = 13; break;
330#endif
331#ifdef EXTA
332		case EXTA: ospeed = 14; break;
333#endif
334#ifdef EXTB
335		case EXTB: ospeed = 15; break;
336#endif
337#ifdef B57600
338		case B57600: ospeed = 16; break;
339#endif
340#ifdef B115200
341		case B115200: ospeed = 17; break;
342#endif
343		default: ;
344		}
345#endif
346		erase_char = s.c_cc[VERASE];
347#ifdef VERASE2
348		erase2_char = s.c_cc[VERASE2];
349#endif
350		kill_char = s.c_cc[VKILL];
351#ifdef VWERASE
352		werase_char = s.c_cc[VWERASE];
353#else
354		werase_char = CONTROL('W');
355#endif
356
357		/*
358		 * Set the modes to the way we want them.
359		 */
360		s.c_lflag &= ~(0
361#ifdef ICANON
362			| ICANON
363#endif
364#ifdef ECHO
365			| ECHO
366#endif
367#ifdef ECHOE
368			| ECHOE
369#endif
370#ifdef ECHOK
371			| ECHOK
372#endif
373#if ECHONL
374			| ECHONL
375#endif
376		);
377
378		s.c_oflag |= (0
379#ifdef OXTABS
380			| OXTABS
381#else
382#ifdef TAB3
383			| TAB3
384#else
385#ifdef XTABS
386			| XTABS
387#endif
388#endif
389#endif
390#ifdef OPOST
391			| OPOST
392#endif
393#ifdef ONLCR
394			| ONLCR
395#endif
396		);
397
398		s.c_oflag &= ~(0
399#ifdef ONOEOT
400			| ONOEOT
401#endif
402#ifdef OCRNL
403			| OCRNL
404#endif
405#ifdef ONOCR
406			| ONOCR
407#endif
408#ifdef ONLRET
409			| ONLRET
410#endif
411		);
412		s.c_cc[VMIN] = 1;
413		s.c_cc[VTIME] = 0;
414#ifdef VLNEXT
415		s.c_cc[VLNEXT] = 0;
416#endif
417#ifdef VDSUSP
418		s.c_cc[VDSUSP] = 0;
419#endif
420#if MUST_SET_LINE_DISCIPLINE
421		/*
422		 * System's termios is broken; need to explicitly
423		 * request TERMIODISC line discipline.
424		 */
425		s.c_line = TERMIODISC;
426#endif
427	} else
428	{
429		/*
430		 * Restore saved modes.
431		 */
432		s = save_term;
433	}
434#if HAVE_FSYNC
435	fsync(tty);
436#endif
437	tcsetattr(tty, TCSADRAIN, &s);
438#if MUST_SET_LINE_DISCIPLINE
439	if (!on)
440	{
441		/*
442		 * Broken termios *ignores* any line discipline
443		 * except TERMIODISC.  A different old line discipline
444		 * is therefore not restored, yet.  Restore the old
445		 * line discipline by hand.
446		 */
447		ioctl(tty, TIOCSETD, &save_term.c_line);
448	}
449#endif
450    }
451#else
452#ifdef TCGETA
453    {
454	struct termio s;
455	static struct termio save_term;
456	static int saved_term = 0;
457
458	if (on)
459	{
460		/*
461		 * Get terminal modes.
462		 */
463		ioctl(tty, TCGETA, &s);
464
465		/*
466		 * Save modes and set certain variables dependent on modes.
467		 */
468		if (!saved_term)
469		{
470			save_term = s;
471			saved_term = 1;
472		}
473#if HAVE_OSPEED
474		ospeed = s.c_cflag & CBAUD;
475#endif
476		erase_char = s.c_cc[VERASE];
477		kill_char = s.c_cc[VKILL];
478#ifdef VWERASE
479		werase_char = s.c_cc[VWERASE];
480#else
481		werase_char = CONTROL('W');
482#endif
483
484		/*
485		 * Set the modes to the way we want them.
486		 */
487		s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL);
488		s.c_oflag |=  (OPOST|ONLCR|TAB3);
489		s.c_oflag &= ~(OCRNL|ONOCR|ONLRET);
490		s.c_cc[VMIN] = 1;
491		s.c_cc[VTIME] = 0;
492	} else
493	{
494		/*
495		 * Restore saved modes.
496		 */
497		s = save_term;
498	}
499	ioctl(tty, TCSETAW, &s);
500    }
501#else
502#ifdef TIOCGETP
503    {
504	struct sgttyb s;
505	static struct sgttyb save_term;
506	static int saved_term = 0;
507
508	if (on)
509	{
510		/*
511		 * Get terminal modes.
512		 */
513		ioctl(tty, TIOCGETP, &s);
514
515		/*
516		 * Save modes and set certain variables dependent on modes.
517		 */
518		if (!saved_term)
519		{
520			save_term = s;
521			saved_term = 1;
522		}
523#if HAVE_OSPEED
524		ospeed = s.sg_ospeed;
525#endif
526		erase_char = s.sg_erase;
527		kill_char = s.sg_kill;
528		werase_char = CONTROL('W');
529
530		/*
531		 * Set the modes to the way we want them.
532		 */
533		s.sg_flags |= CBREAK;
534		s.sg_flags &= ~(ECHO|XTABS);
535	} else
536	{
537		/*
538		 * Restore saved modes.
539		 */
540		s = save_term;
541	}
542	ioctl(tty, TIOCSETN, &s);
543    }
544#else
545#ifdef _OSK
546    {
547	struct sgbuf s;
548	static struct sgbuf save_term;
549	static int saved_term = 0;
550
551	if (on)
552	{
553		/*
554		 * Get terminal modes.
555		 */
556		_gs_opt(tty, &s);
557
558		/*
559		 * Save modes and set certain variables dependent on modes.
560		 */
561		if (!saved_term)
562		{
563			save_term = s;
564			saved_term = 1;
565		}
566		erase_char = s.sg_bspch;
567		kill_char = s.sg_dlnch;
568		werase_char = CONTROL('W');
569
570		/*
571		 * Set the modes to the way we want them.
572		 */
573		s.sg_echo = 0;
574		s.sg_eofch = 0;
575		s.sg_pause = 0;
576		s.sg_psch = 0;
577	} else
578	{
579		/*
580		 * Restore saved modes.
581		 */
582		s = save_term;
583	}
584	_ss_opt(tty, &s);
585    }
586#else
587	/* MS-DOS, Windows, or OS2 */
588#if OS2
589	/* OS2 */
590	LSIGNAL(SIGINT, SIG_IGN);
591#endif
592	erase_char = '\b';
593#if MSDOS_COMPILER==DJGPPC
594	kill_char = CONTROL('U');
595	/*
596	 * So that when we shell out or run another program, its
597	 * stdin is in cooked mode.  We do not switch stdin to binary
598	 * mode if fd0 is zero, since that means we were called before
599	 * tty was reopened in open_getchr, in which case we would be
600	 * changing the original stdin device outside less.
601	 */
602	if (fd0 != 0)
603		setmode(0, on ? O_BINARY : O_TEXT);
604#else
605	kill_char = ESC;
606#endif
607	werase_char = CONTROL('W');
608#endif
609#endif
610#endif
611#endif
612	curr_on = on;
613}
614
615#if !MSDOS_COMPILER
616/*
617 * Some glue to prevent calling termcap functions if tgetent() failed.
618 */
619static int hardcopy;
620
621	static char *
622ltget_env(capname)
623	char *capname;
624{
625	char name[16];
626	char *s;
627
628	s = lgetenv("LESS_TERMCAP_DEBUG");
629	if (s != NULL && *s != '\0')
630	{
631		struct env { struct env *next; char *name; char *value; };
632		static struct env *envs = NULL;
633		struct env *p;
634		for (p = envs;  p != NULL;  p = p->next)
635			if (strcmp(p->name, capname) == 0)
636				return p->value;
637		p = (struct env *) ecalloc(1, sizeof(struct env));
638		p->name = save(capname);
639		p->value = (char *) ecalloc(strlen(capname)+3, sizeof(char));
640		sprintf(p->value, "<%s>", capname);
641		p->next = envs;
642		envs = p;
643		return p->value;
644	}
645	strcpy(name, "LESS_TERMCAP_");
646	strcat(name, capname);
647	return (lgetenv(name));
648}
649
650	static int
651ltgetflag(capname)
652	char *capname;
653{
654	char *s;
655
656	if ((s = ltget_env(capname)) != NULL)
657		return (*s != '\0' && *s != '0');
658	if (hardcopy)
659		return (0);
660	return (tgetflag(capname));
661}
662
663	static int
664ltgetnum(capname)
665	char *capname;
666{
667	char *s;
668
669	if ((s = ltget_env(capname)) != NULL)
670		return (atoi(s));
671	if (hardcopy)
672		return (-1);
673	return (tgetnum(capname));
674}
675
676	static char *
677ltgetstr(capname, pp)
678	char *capname;
679	char **pp;
680{
681	char *s;
682
683	if ((s = ltget_env(capname)) != NULL)
684		return (s);
685	if (hardcopy)
686		return (NULL);
687	return (tgetstr(capname, pp));
688}
689#endif /* MSDOS_COMPILER */
690
691/*
692 * Get size of the output screen.
693 */
694	public void
695scrsize()
696{
697	register char *s;
698	int sys_height;
699	int sys_width;
700#if !MSDOS_COMPILER
701	int n;
702#endif
703
704#define	DEF_SC_WIDTH	80
705#if MSDOS_COMPILER
706#define	DEF_SC_HEIGHT	25
707#else
708#define	DEF_SC_HEIGHT	24
709#endif
710
711
712	sys_width = sys_height = 0;
713
714#if MSDOS_COMPILER==MSOFTC
715	{
716		struct videoconfig w;
717		_getvideoconfig(&w);
718		sys_height = w.numtextrows;
719		sys_width = w.numtextcols;
720	}
721#else
722#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
723	{
724		struct text_info w;
725		gettextinfo(&w);
726		sys_height = w.screenheight;
727		sys_width = w.screenwidth;
728	}
729#else
730#if MSDOS_COMPILER==WIN32C
731	{
732		CONSOLE_SCREEN_BUFFER_INFO scr;
733		GetConsoleScreenBufferInfo(con_out, &scr);
734		sys_height = scr.srWindow.Bottom - scr.srWindow.Top + 1;
735		sys_width = scr.srWindow.Right - scr.srWindow.Left + 1;
736	}
737#else
738#if OS2
739	{
740		int s[2];
741		_scrsize(s);
742		sys_width = s[0];
743		sys_height = s[1];
744		/*
745		 * When using terminal emulators for XFree86/OS2, the
746		 * _scrsize function does not work well.
747		 * Call the scrsize.exe program to get the window size.
748		 */
749		windowid = getenv("WINDOWID");
750		if (windowid != NULL)
751		{
752			FILE *fd = popen("scrsize", "rt");
753			if (fd != NULL)
754			{
755				int w, h;
756				fscanf(fd, "%i %i", &w, &h);
757				if (w > 0 && h > 0)
758				{
759					sys_width = w;
760					sys_height = h;
761				}
762				pclose(fd);
763			}
764		}
765	}
766#else
767#ifdef TIOCGWINSZ
768	{
769		struct winsize w;
770		if (ioctl(2, TIOCGWINSZ, &w) == 0)
771		{
772			if (w.ws_row > 0)
773				sys_height = w.ws_row;
774			if (w.ws_col > 0)
775				sys_width = w.ws_col;
776		}
777	}
778#else
779#ifdef WIOCGETD
780	{
781		struct uwdata w;
782		if (ioctl(2, WIOCGETD, &w) == 0)
783		{
784			if (w.uw_height > 0)
785				sys_height = w.uw_height / w.uw_vs;
786			if (w.uw_width > 0)
787				sys_width = w.uw_width / w.uw_hs;
788		}
789	}
790#endif
791#endif
792#endif
793#endif
794#endif
795#endif
796
797	if (sys_height > 0)
798		sc_height = sys_height;
799	else if ((s = lgetenv("LINES")) != NULL)
800		sc_height = atoi(s);
801#if !MSDOS_COMPILER
802	else if ((n = ltgetnum("li")) > 0)
803 		sc_height = n;
804#endif
805	else
806		sc_height = DEF_SC_HEIGHT;
807
808	if (sys_width > 0)
809		sc_width = sys_width;
810	else if ((s = lgetenv("COLUMNS")) != NULL)
811		sc_width = atoi(s);
812#if !MSDOS_COMPILER
813	else if ((n = ltgetnum("co")) > 0)
814 		sc_width = n;
815#endif
816	else
817		sc_width = DEF_SC_WIDTH;
818}
819
820#if MSDOS_COMPILER==MSOFTC
821/*
822 * Figure out how many empty loops it takes to delay a millisecond.
823 */
824	static void
825get_clock()
826{
827	clock_t start;
828
829	/*
830	 * Get synchronized at the start of a tick.
831	 */
832	start = clock();
833	while (clock() == start)
834		;
835	/*
836	 * Now count loops till the next tick.
837	 */
838	start = clock();
839	msec_loops = 0;
840	while (clock() == start)
841		msec_loops++;
842	/*
843	 * Convert from (loops per clock) to (loops per millisecond).
844	 */
845	msec_loops *= CLOCKS_PER_SEC;
846	msec_loops /= 1000;
847}
848
849/*
850 * Delay for a specified number of milliseconds.
851 */
852	static void
853dummy_func()
854{
855	static long delay_dummy = 0;
856	delay_dummy++;
857}
858
859	static void
860delay(msec)
861	int msec;
862{
863	long i;
864
865	while (msec-- > 0)
866	{
867		for (i = 0;  i < msec_loops;  i++)
868		{
869			/*
870			 * Make it look like we're doing something here,
871			 * so the optimizer doesn't remove the whole loop.
872			 */
873			dummy_func();
874		}
875	}
876}
877#endif
878
879/*
880 * Return the characters actually input by a "special" key.
881 */
882	public char *
883special_key_str(key)
884	int key;
885{
886	static char tbuf[40];
887	char *s;
888#if MSDOS_COMPILER || OS2
889	static char k_right[]		= { '\340', PCK_RIGHT, 0 };
890	static char k_left[]		= { '\340', PCK_LEFT, 0  };
891	static char k_ctl_right[]	= { '\340', PCK_CTL_RIGHT, 0  };
892	static char k_ctl_left[]	= { '\340', PCK_CTL_LEFT, 0  };
893	static char k_insert[]		= { '\340', PCK_INSERT, 0  };
894	static char k_delete[]		= { '\340', PCK_DELETE, 0  };
895	static char k_ctl_delete[]	= { '\340', PCK_CTL_DELETE, 0  };
896	static char k_ctl_backspace[]	= { '\177', 0 };
897	static char k_home[]		= { '\340', PCK_HOME, 0 };
898	static char k_end[]		= { '\340', PCK_END, 0 };
899	static char k_up[]		= { '\340', PCK_UP, 0 };
900	static char k_down[]		= { '\340', PCK_DOWN, 0 };
901	static char k_backtab[]		= { '\340', PCK_SHIFT_TAB, 0 };
902	static char k_pagedown[]	= { '\340', PCK_PAGEDOWN, 0 };
903	static char k_pageup[]		= { '\340', PCK_PAGEUP, 0 };
904	static char k_f1[]		= { '\340', PCK_F1, 0 };
905#endif
906#if !MSDOS_COMPILER
907	char *sp = tbuf;
908#endif
909
910	switch (key)
911	{
912#if OS2
913	/*
914	 * If windowid is not NULL, assume less is executed in
915	 * the XFree86 environment.
916	 */
917	case SK_RIGHT_ARROW:
918		s = windowid ? ltgetstr("kr", &sp) : k_right;
919		break;
920	case SK_LEFT_ARROW:
921		s = windowid ? ltgetstr("kl", &sp) : k_left;
922		break;
923	case SK_UP_ARROW:
924		s = windowid ? ltgetstr("ku", &sp) : k_up;
925		break;
926	case SK_DOWN_ARROW:
927		s = windowid ? ltgetstr("kd", &sp) : k_down;
928		break;
929	case SK_PAGE_UP:
930		s = windowid ? ltgetstr("kP", &sp) : k_pageup;
931		break;
932	case SK_PAGE_DOWN:
933		s = windowid ? ltgetstr("kN", &sp) : k_pagedown;
934		break;
935	case SK_HOME:
936		s = windowid ? ltgetstr("kh", &sp) : k_home;
937		break;
938	case SK_END:
939		s = windowid ? ltgetstr("@7", &sp) : k_end;
940		break;
941	case SK_DELETE:
942		if (windowid)
943		{
944			s = ltgetstr("kD", &sp);
945			if (s == NULL)
946			{
947				tbuf[0] = '\177';
948				tbuf[1] = '\0';
949				s = tbuf;
950			}
951		} else
952			s = k_delete;
953		break;
954#endif
955#if MSDOS_COMPILER
956	case SK_RIGHT_ARROW:
957		s = k_right;
958		break;
959	case SK_LEFT_ARROW:
960		s = k_left;
961		break;
962	case SK_UP_ARROW:
963		s = k_up;
964		break;
965	case SK_DOWN_ARROW:
966		s = k_down;
967		break;
968	case SK_PAGE_UP:
969		s = k_pageup;
970		break;
971	case SK_PAGE_DOWN:
972		s = k_pagedown;
973		break;
974	case SK_HOME:
975		s = k_home;
976		break;
977	case SK_END:
978		s = k_end;
979		break;
980	case SK_DELETE:
981		s = k_delete;
982		break;
983#endif
984#if MSDOS_COMPILER || OS2
985	case SK_INSERT:
986		s = k_insert;
987		break;
988	case SK_CTL_LEFT_ARROW:
989		s = k_ctl_left;
990		break;
991	case SK_CTL_RIGHT_ARROW:
992		s = k_ctl_right;
993		break;
994	case SK_CTL_BACKSPACE:
995		s = k_ctl_backspace;
996		break;
997	case SK_CTL_DELETE:
998		s = k_ctl_delete;
999		break;
1000	case SK_F1:
1001		s = k_f1;
1002		break;
1003	case SK_BACKTAB:
1004		s = k_backtab;
1005		break;
1006#else
1007	case SK_RIGHT_ARROW:
1008		s = ltgetstr("kr", &sp);
1009		break;
1010	case SK_LEFT_ARROW:
1011		s = ltgetstr("kl", &sp);
1012		break;
1013	case SK_UP_ARROW:
1014		s = ltgetstr("ku", &sp);
1015		break;
1016	case SK_DOWN_ARROW:
1017		s = ltgetstr("kd", &sp);
1018		break;
1019	case SK_PAGE_UP:
1020		s = ltgetstr("kP", &sp);
1021		break;
1022	case SK_PAGE_DOWN:
1023		s = ltgetstr("kN", &sp);
1024		break;
1025	case SK_HOME:
1026		s = ltgetstr("kh", &sp);
1027		break;
1028	case SK_END:
1029		s = ltgetstr("@7", &sp);
1030		break;
1031	case SK_DELETE:
1032		s = ltgetstr("kD", &sp);
1033		if (s == NULL)
1034		{
1035			tbuf[0] = '\177';
1036			tbuf[1] = '\0';
1037			s = tbuf;
1038		}
1039		break;
1040#endif
1041	case SK_CONTROL_K:
1042		tbuf[0] = CONTROL('K');
1043		tbuf[1] = '\0';
1044		s = tbuf;
1045		break;
1046	default:
1047		return (NULL);
1048	}
1049	return (s);
1050}
1051
1052/*
1053 * Get terminal capabilities via termcap.
1054 */
1055	public void
1056get_term()
1057{
1058#if MSDOS_COMPILER
1059	auto_wrap = 1;
1060	ignaw = 0;
1061	can_goto_line = 1;
1062	clear_bg = 1;
1063	/*
1064	 * Set up default colors.
1065	 * The xx_s_width and xx_e_width vars are already initialized to 0.
1066	 */
1067#if MSDOS_COMPILER==MSOFTC
1068	sy_bg_color = _getbkcolor();
1069	sy_fg_color = _gettextcolor();
1070	get_clock();
1071#else
1072#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1073    {
1074	struct text_info w;
1075	gettextinfo(&w);
1076	sy_bg_color = (w.attribute >> 4) & 0x0F;
1077	sy_fg_color = (w.attribute >> 0) & 0x0F;
1078    }
1079#else
1080#if MSDOS_COMPILER==WIN32C
1081    {
1082	DWORD nread;
1083	CONSOLE_SCREEN_BUFFER_INFO scr;
1084
1085	con_out_save = con_out = GetStdHandle(STD_OUTPUT_HANDLE);
1086	/*
1087	 * Always open stdin in binary. Note this *must* be done
1088	 * before any file operations have been done on fd0.
1089	 */
1090	SET_BINARY(0);
1091	GetConsoleScreenBufferInfo(con_out, &scr);
1092	ReadConsoleOutputAttribute(con_out, &curr_attr,
1093					1, scr.dwCursorPosition, &nread);
1094	sy_bg_color = (curr_attr & BG_COLORS) >> 4; /* normalize */
1095	sy_fg_color = curr_attr & FG_COLORS;
1096    }
1097#endif
1098#endif
1099#endif
1100	nm_fg_color = sy_fg_color;
1101	nm_bg_color = sy_bg_color;
1102	bo_fg_color = 11;
1103	bo_bg_color = 0;
1104	ul_fg_color = 9;
1105	ul_bg_color = 0;
1106	so_fg_color = 15;
1107	so_bg_color = 9;
1108	bl_fg_color = 15;
1109	bl_bg_color = 0;
1110
1111	/*
1112	 * Get size of the screen.
1113	 */
1114	scrsize();
1115	pos_init();
1116
1117
1118#else /* !MSDOS_COMPILER */
1119
1120	char *sp;
1121	register char *t1, *t2;
1122	char *term;
1123	char termbuf[TERMBUF_SIZE];
1124
1125	static char sbuf[TERMSBUF_SIZE];
1126
1127#if OS2
1128	/*
1129	 * Make sure the termcap database is available.
1130	 */
1131	sp = lgetenv("TERMCAP");
1132	if (sp == NULL || *sp == '\0')
1133	{
1134		char *termcap;
1135		if ((sp = homefile("termcap.dat")) != NULL)
1136		{
1137			termcap = (char *) ecalloc(strlen(sp)+9, sizeof(char));
1138			sprintf(termcap, "TERMCAP=%s", sp);
1139			free(sp);
1140			putenv(termcap);
1141		}
1142	}
1143#endif
1144	/*
1145	 * Find out what kind of terminal this is.
1146	 */
1147 	if ((term = lgetenv("TERM")) == NULL)
1148 		term = DEFAULT_TERM;
1149	hardcopy = 0;
1150 	if (tgetent(termbuf, term) != TGETENT_OK)
1151 		hardcopy = 1;
1152 	if (ltgetflag("hc"))
1153		hardcopy = 1;
1154
1155	/*
1156	 * Get size of the screen.
1157	 */
1158	scrsize();
1159	pos_init();
1160
1161	auto_wrap = ltgetflag("am");
1162	ignaw = ltgetflag("xn");
1163	above_mem = ltgetflag("da");
1164	below_mem = ltgetflag("db");
1165	clear_bg = ltgetflag("ut");
1166
1167	/*
1168	 * Assumes termcap variable "sg" is the printing width of:
1169	 * the standout sequence, the end standout sequence,
1170	 * the underline sequence, the end underline sequence,
1171	 * the boldface sequence, and the end boldface sequence.
1172	 */
1173	if ((so_s_width = ltgetnum("sg")) < 0)
1174		so_s_width = 0;
1175	so_e_width = so_s_width;
1176
1177	bo_s_width = bo_e_width = so_s_width;
1178	ul_s_width = ul_e_width = so_s_width;
1179	bl_s_width = bl_e_width = so_s_width;
1180
1181#if HILITE_SEARCH
1182	if (so_s_width > 0 || so_e_width > 0)
1183		/*
1184		 * Disable highlighting by default on magic cookie terminals.
1185		 * Turning on highlighting might change the displayed width
1186		 * of a line, causing the display to get messed up.
1187		 * The user can turn it back on with -g,
1188		 * but she won't like the results.
1189		 */
1190		hilite_search = 0;
1191#endif
1192
1193	/*
1194	 * Get various string-valued capabilities.
1195	 */
1196	sp = sbuf;
1197
1198#if HAVE_OSPEED
1199	sc_pad = ltgetstr("pc", &sp);
1200	if (sc_pad != NULL)
1201		PC = *sc_pad;
1202#endif
1203
1204	sc_s_keypad = ltgetstr("ks", &sp);
1205	if (sc_s_keypad == NULL)
1206		sc_s_keypad = "";
1207	sc_e_keypad = ltgetstr("ke", &sp);
1208	if (sc_e_keypad == NULL)
1209		sc_e_keypad = "";
1210
1211	sc_init = ltgetstr("ti", &sp);
1212	if (sc_init == NULL)
1213		sc_init = "";
1214
1215	sc_deinit= ltgetstr("te", &sp);
1216	if (sc_deinit == NULL)
1217		sc_deinit = "";
1218
1219	sc_eol_clear = ltgetstr("ce", &sp);
1220	if (sc_eol_clear == NULL || *sc_eol_clear == '\0')
1221	{
1222		missing_cap = 1;
1223		sc_eol_clear = "";
1224	}
1225
1226	sc_eos_clear = ltgetstr("cd", &sp);
1227	if (below_mem && (sc_eos_clear == NULL || *sc_eos_clear == '\0'))
1228	{
1229		missing_cap = 1;
1230		sc_eos_clear = "";
1231	}
1232
1233	sc_clear = ltgetstr("cl", &sp);
1234	if (sc_clear == NULL || *sc_clear == '\0')
1235	{
1236		missing_cap = 1;
1237		sc_clear = "\n\n";
1238	}
1239
1240	sc_move = ltgetstr("cm", &sp);
1241	if (sc_move == NULL || *sc_move == '\0')
1242	{
1243		/*
1244		 * This is not an error here, because we don't
1245		 * always need sc_move.
1246		 * We need it only if we don't have home or lower-left.
1247		 */
1248		sc_move = "";
1249		can_goto_line = 0;
1250	} else
1251		can_goto_line = 1;
1252
1253	tmodes("so", "se", &sc_s_in, &sc_s_out, "", "", &sp);
1254	tmodes("us", "ue", &sc_u_in, &sc_u_out, sc_s_in, sc_s_out, &sp);
1255	tmodes("md", "me", &sc_b_in, &sc_b_out, sc_s_in, sc_s_out, &sp);
1256	tmodes("mb", "me", &sc_bl_in, &sc_bl_out, sc_s_in, sc_s_out, &sp);
1257
1258	sc_visual_bell = ltgetstr("vb", &sp);
1259	if (sc_visual_bell == NULL)
1260		sc_visual_bell = "";
1261
1262	if (ltgetflag("bs"))
1263		sc_backspace = "\b";
1264	else
1265	{
1266		sc_backspace = ltgetstr("bc", &sp);
1267		if (sc_backspace == NULL || *sc_backspace == '\0')
1268			sc_backspace = "\b";
1269	}
1270
1271	/*
1272	 * Choose between using "ho" and "cm" ("home" and "cursor move")
1273	 * to move the cursor to the upper left corner of the screen.
1274	 */
1275	t1 = ltgetstr("ho", &sp);
1276	if (t1 == NULL)
1277		t1 = "";
1278	if (*sc_move == '\0')
1279		t2 = "";
1280	else
1281	{
1282		strcpy(sp, tgoto(sc_move, 0, 0));
1283		t2 = sp;
1284		sp += strlen(sp) + 1;
1285	}
1286	sc_home = cheaper(t1, t2, "|\b^");
1287
1288	/*
1289	 * Choose between using "ll" and "cm"  ("lower left" and "cursor move")
1290	 * to move the cursor to the lower left corner of the screen.
1291	 */
1292	t1 = ltgetstr("ll", &sp);
1293	if (t1 == NULL)
1294		t1 = "";
1295	if (*sc_move == '\0')
1296		t2 = "";
1297	else
1298	{
1299		strcpy(sp, tgoto(sc_move, 0, sc_height-1));
1300		t2 = sp;
1301		sp += strlen(sp) + 1;
1302	}
1303	sc_lower_left = cheaper(t1, t2, "\r");
1304
1305	/*
1306	 * Get carriage return string.
1307	 */
1308	sc_return = ltgetstr("cr", &sp);
1309	if (sc_return == NULL)
1310		sc_return = "\r";
1311
1312	/*
1313	 * Choose between using "al" or "sr" ("add line" or "scroll reverse")
1314	 * to add a line at the top of the screen.
1315	 */
1316	t1 = ltgetstr("al", &sp);
1317	if (t1 == NULL)
1318		t1 = "";
1319	t2 = ltgetstr("sr", &sp);
1320	if (t2 == NULL)
1321		t2 = "";
1322#if OS2
1323	if (*t1 == '\0' && *t2 == '\0')
1324		sc_addline = "";
1325	else
1326#endif
1327	if (above_mem)
1328		sc_addline = t1;
1329	else
1330		sc_addline = cheaper(t1, t2, "");
1331	if (*sc_addline == '\0')
1332	{
1333		/*
1334		 * Force repaint on any backward movement.
1335		 */
1336		no_back_scroll = 1;
1337	}
1338#endif /* MSDOS_COMPILER */
1339}
1340
1341#if !MSDOS_COMPILER
1342/*
1343 * Return the cost of displaying a termcap string.
1344 * We use the trick of calling tputs, but as a char printing function
1345 * we give it inc_costcount, which just increments "costcount".
1346 * This tells us how many chars would be printed by using this string.
1347 * {{ Couldn't we just use strlen? }}
1348 */
1349static int costcount;
1350
1351/*ARGSUSED*/
1352	static int
1353inc_costcount(c)
1354	int c;
1355{
1356	costcount++;
1357	return (c);
1358}
1359
1360	static int
1361cost(t)
1362	char *t;
1363{
1364	costcount = 0;
1365	tputs(t, sc_height, inc_costcount);
1366	return (costcount);
1367}
1368
1369/*
1370 * Return the "best" of the two given termcap strings.
1371 * The best, if both exist, is the one with the lower
1372 * cost (see cost() function).
1373 */
1374	static char *
1375cheaper(t1, t2, def)
1376	char *t1, *t2;
1377	char *def;
1378{
1379	if (*t1 == '\0' && *t2 == '\0')
1380	{
1381		missing_cap = 1;
1382		return (def);
1383	}
1384	if (*t1 == '\0')
1385		return (t2);
1386	if (*t2 == '\0')
1387		return (t1);
1388	if (cost(t1) < cost(t2))
1389		return (t1);
1390	return (t2);
1391}
1392
1393	static void
1394tmodes(incap, outcap, instr, outstr, def_instr, def_outstr, spp)
1395	char *incap;
1396	char *outcap;
1397	char **instr;
1398	char **outstr;
1399	char *def_instr;
1400	char *def_outstr;
1401	char **spp;
1402{
1403	*instr = ltgetstr(incap, spp);
1404	if (*instr == NULL)
1405	{
1406		/* Use defaults. */
1407		*instr = def_instr;
1408		*outstr = def_outstr;
1409		return;
1410	}
1411
1412	*outstr = ltgetstr(outcap, spp);
1413	if (*outstr == NULL)
1414		/* No specific out capability; use "me". */
1415		*outstr = ltgetstr("me", spp);
1416	if (*outstr == NULL)
1417		/* Don't even have "me"; use a null string. */
1418		*outstr = "";
1419}
1420
1421#endif /* MSDOS_COMPILER */
1422
1423
1424/*
1425 * Below are the functions which perform all the
1426 * terminal-specific screen manipulation.
1427 */
1428
1429
1430#if MSDOS_COMPILER
1431
1432#if MSDOS_COMPILER==WIN32C
1433	static void
1434_settextposition(int row, int col)
1435{
1436	COORD cpos;
1437	CONSOLE_SCREEN_BUFFER_INFO csbi;
1438
1439	GetConsoleScreenBufferInfo(con_out, &csbi);
1440	cpos.X = csbi.srWindow.Left + (col - 1);
1441	cpos.Y = csbi.srWindow.Top + (row - 1);
1442	SetConsoleCursorPosition(con_out, cpos);
1443}
1444#endif
1445
1446/*
1447 * Initialize the screen to the correct color at startup.
1448 */
1449	static void
1450initcolor()
1451{
1452	SETCOLORS(nm_fg_color, nm_bg_color);
1453#if 0
1454	/*
1455	 * This clears the screen at startup.  This is different from
1456	 * the behavior of other versions of less.  Disable it for now.
1457	 */
1458	char *blanks;
1459	int row;
1460	int col;
1461
1462	/*
1463	 * Create a complete, blank screen using "normal" colors.
1464	 */
1465	SETCOLORS(nm_fg_color, nm_bg_color);
1466	blanks = (char *) ecalloc(width+1, sizeof(char));
1467	for (col = 0;  col < sc_width;  col++)
1468		blanks[col] = ' ';
1469	blanks[sc_width] = '\0';
1470	for (row = 0;  row < sc_height;  row++)
1471		_outtext(blanks);
1472	free(blanks);
1473#endif
1474}
1475#endif
1476
1477#if MSDOS_COMPILER==WIN32C
1478
1479/*
1480 * Termcap-like init with a private win32 console.
1481 */
1482	static void
1483win32_init_term()
1484{
1485	CONSOLE_SCREEN_BUFFER_INFO scr;
1486	COORD size;
1487
1488	if (con_out_save == INVALID_HANDLE_VALUE)
1489		return;
1490
1491	GetConsoleScreenBufferInfo(con_out_save, &scr);
1492
1493	if (con_out_ours == INVALID_HANDLE_VALUE)
1494	{
1495		/*
1496		 * Create our own screen buffer, so that we
1497		 * may restore the original when done.
1498		 */
1499		con_out_ours = CreateConsoleScreenBuffer(
1500			GENERIC_WRITE | GENERIC_READ,
1501			FILE_SHARE_WRITE | FILE_SHARE_READ,
1502			(LPSECURITY_ATTRIBUTES) NULL,
1503			CONSOLE_TEXTMODE_BUFFER,
1504			(LPVOID) NULL);
1505	}
1506
1507	size.X = scr.srWindow.Right - scr.srWindow.Left + 1;
1508	size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1;
1509	SetConsoleScreenBufferSize(con_out_ours, size);
1510	SetConsoleActiveScreenBuffer(con_out_ours);
1511	con_out = con_out_ours;
1512}
1513
1514/*
1515 * Restore the startup console.
1516 */
1517static void
1518win32_deinit_term()
1519{
1520	if (con_out_save == INVALID_HANDLE_VALUE)
1521		return;
1522	if (quitting)
1523		(void) CloseHandle(con_out_ours);
1524	SetConsoleActiveScreenBuffer(con_out_save);
1525	con_out = con_out_save;
1526}
1527
1528#endif
1529
1530/*
1531 * Initialize terminal
1532 */
1533	public void
1534init()
1535{
1536#if !MSDOS_COMPILER
1537	if (!no_init)
1538		tputs(sc_init, sc_height, putchr);
1539	if (!no_keypad)
1540		tputs(sc_s_keypad, sc_height, putchr);
1541	if (top_scroll)
1542	{
1543		int i;
1544
1545		/*
1546		 * This is nice to terminals with no alternate screen,
1547		 * but with saved scrolled-off-the-top lines.  This way,
1548		 * no previous line is lost, but we start with a whole
1549		 * screen to ourself.
1550		 */
1551		for (i = 1; i < sc_height; i++)
1552			putchr('\n');
1553	}
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 = 0;
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	WriteConsole(con_out, text, len, NULL, NULL);
2493#else
2494	char c = text[len];
2495	text[len] = '\0';
2496	cputs(text);
2497	text[len] = c;
2498#endif
2499}
2500#endif
2501