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etc/services - sync with NetBSD-8
[minix.git] / external / bsd / less / dist / screen.c
blob1fcba48969f104127626dec3ba9263c0d806017b
1 /* $NetBSD: screen.c,v 1.4 2013/09/04 19:44:21 tron Exp $ */
2
3 /*
4 * Copyright (C) 1984-2012 Mark Nudelman
5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Less License, as specified in the README file.
8 *
9 * For more information, see the README file.
10 */
11
12
13 /*
14 * Routines which deal with the characteristics of the terminal.
15 * Uses termcap to be as terminal-independent as possible.
16 */
17
18 #include "less.h"
19 #include "cmd.h"
20
21 #if MSDOS_COMPILER
22 #include "pckeys.h"
23 #if MSDOS_COMPILER==MSOFTC
24 #include <graph.h>
25 #else
26 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
27 #include <conio.h>
28 #if MSDOS_COMPILER==DJGPPC
29 #include <pc.h>
30 extern int fd0;
31 #endif
32 #else
33 #if MSDOS_COMPILER==WIN32C
34 #include <windows.h>
35 #endif
36 #endif
37 #endif
38 #include <time.h>
39
40 #else
41
42 #if HAVE_SYS_IOCTL_H
43 #include <sys/ioctl.h>
44 #endif
45
46 #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS
47 #include <termios.h>
48 #else
49 #if HAVE_TERMIO_H
50 #include <termio.h>
51 #else
52 #if HAVE_SGSTAT_H
53 #include <sgstat.h>
54 #else
55 #include <sgtty.h>
56 #endif
57 #endif
58 #endif
59
60 #if HAVE_TERMCAP_H
61 #include <termcap.h>
62 #endif
63 #ifdef _OSK
64 #include <signal.h>
65 #endif
66 #if OS2
67 #include <sys/signal.h>
68 #include "pckeys.h"
69 #endif
70 #if HAVE_SYS_STREAM_H
71 #include <sys/stream.h>
72 #endif
73 #if HAVE_SYS_PTEM_H
74 #include <sys/ptem.h>
75 #endif
76
77 #endif /* MSDOS_COMPILER */
78
79 /*
80 * Check for broken termios package that forces you to manually
81 * set the line discipline.
82 */
83 #ifdef __ultrix__
84 #define MUST_SET_LINE_DISCIPLINE 1
85 #else
86 #define MUST_SET_LINE_DISCIPLINE 0
87 #endif
88
89 #if OS2
90 #define DEFAULT_TERM "ansi"
91 static char *windowid;
92 #else
93 #define DEFAULT_TERM "unknown"
94 #endif
95
96 #if MSDOS_COMPILER==MSOFTC
97 static int videopages;
98 static long msec_loops;
99 static int flash_created = 0;
100 #define SETCOLORS(fg,bg) { _settextcolor(fg); _setbkcolor(bg); }
101 #endif
102
103 #if MSDOS_COMPILER==BORLANDC
104 static unsigned short *whitescreen;
105 static int flash_created = 0;
106 #endif
107 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
108 #define _settextposition(y,x) gotoxy(x,y)
109 #define _clearscreen(m) clrscr()
110 #define _outtext(s) cputs(s)
111 #define SETCOLORS(fg,bg) { textcolor(fg); textbackground(bg); }
112 extern int sc_height;
113 #endif
114
115 #if MSDOS_COMPILER==WIN32C
116 struct keyRecord
117 {
118 int ascii;
119 int scan;
120 } currentKey;
121
122 static int keyCount = 0;
123 static WORD curr_attr;
124 static int pending_scancode = 0;
125 static WORD *whitescreen;
126
127 static HANDLE con_out_save = INVALID_HANDLE_VALUE; /* previous console */
128 static HANDLE con_out_ours = INVALID_HANDLE_VALUE; /* our own */
129 HANDLE con_out = INVALID_HANDLE_VALUE; /* current console */
130
131 extern int quitting;
132 static void win32_init_term();
133 static void win32_deinit_term();
134
135 #define FG_COLORS (FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_INTENSITY)
136 #define BG_COLORS (BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_INTENSITY)
137 #define MAKEATTR(fg,bg) ((WORD)((fg)|((bg)<<4)))
138 #define SETCOLORS(fg,bg) { curr_attr = MAKEATTR(fg,bg); \
139 if (SetConsoleTextAttribute(con_out, curr_attr) == 0) \
140 error("SETCOLORS failed"); }
141 #endif
142
143 #if MSDOS_COMPILER
144 public int nm_fg_color; /* Color of normal text */
145 public int nm_bg_color;
146 public int bo_fg_color; /* Color of bold text */
147 public int bo_bg_color;
148 public int ul_fg_color; /* Color of underlined text */
149 public int ul_bg_color;
150 public int so_fg_color; /* Color of standout text */
151 public int so_bg_color;
152 public int bl_fg_color; /* Color of blinking text */
153 public int bl_bg_color;
154 static int sy_fg_color; /* Color of system text (before less) */
155 static int sy_bg_color;
156
157 #else
158
159 /*
160 * Strings passed to tputs() to do various terminal functions.
161 */
162 static char
163 *sc_pad, /* Pad string */
164 *sc_home, /* Cursor home */
165 *sc_addline, /* Add line, scroll down following lines */
166 *sc_lower_left, /* Cursor to last line, first column */
167 *sc_return, /* Cursor to beginning of current line */
168 *sc_move, /* General cursor positioning */
169 *sc_clear, /* Clear screen */
170 *sc_eol_clear, /* Clear to end of line */
171 *sc_eos_clear, /* Clear to end of screen */
172 *sc_s_in, /* Enter standout (highlighted) mode */
173 *sc_s_out, /* Exit standout mode */
174 *sc_u_in, /* Enter underline mode */
175 *sc_u_out, /* Exit underline mode */
176 *sc_b_in, /* Enter bold mode */
177 *sc_b_out, /* Exit bold mode */
178 *sc_bl_in, /* Enter blink mode */
179 *sc_bl_out, /* Exit blink mode */
180 *sc_visual_bell, /* Visual bell (flash screen) sequence */
181 *sc_backspace, /* Backspace cursor */
182 *sc_s_keypad, /* Start keypad mode */
183 *sc_e_keypad, /* End keypad mode */
184 *sc_init, /* Startup terminal initialization */
185 *sc_deinit; /* Exit terminal de-initialization */
186 #endif
187
188 static int init_done = 0;
189
190 public int auto_wrap; /* Terminal does \r\n when write past margin */
191 public int ignaw; /* Terminal ignores \n immediately after wrap */
192 public int erase_char; /* The user's erase char */
193 public int erase2_char; /* The user's other erase char */
194 public int kill_char; /* The user's line-kill char */
195 public int werase_char; /* The user's word-erase char */
196 public int sc_width, sc_height; /* Height & width of screen */
197 public int bo_s_width, bo_e_width; /* Printing width of boldface seq */
198 public int ul_s_width, ul_e_width; /* Printing width of underline seq */
199 public int so_s_width, so_e_width; /* Printing width of standout seq */
200 public int bl_s_width, bl_e_width; /* Printing width of blink seq */
201 public int above_mem, below_mem; /* Memory retained above/below screen */
202 public int can_goto_line; /* Can move cursor to any line */
203 public int clear_bg; /* Clear fills with background color */
204 public int missing_cap = 0; /* Some capability is missing */
205
206 static int attrmode = AT_NORMAL;
207 extern int binattr;
208
209 #if !MSDOS_COMPILER
210 static char *cheaper();
211 static void tmodes();
212 #endif
213
214 /*
215 * These two variables are sometimes defined in,
216 * and needed by, the termcap library.
217 */
218 #if MUST_DEFINE_OSPEED
219 extern short ospeed; /* Terminal output baud rate */
220 extern char PC; /* Pad character */
221 #endif
222 #ifdef _OSK
223 short ospeed;
224 char PC_, *UP, *BC;
225 #endif
226
227 extern int quiet; /* If VERY_QUIET, use visual bell for bell */
228 extern int no_back_scroll;
229 extern int swindow;
230 extern int no_init;
231 extern int quit_at_eof;
232 extern int more_mode;
233 extern int no_keypad;
234 extern int sigs;
235 extern int wscroll;
236 extern int screen_trashed;
237 extern int tty;
238 extern int top_scroll;
239 extern int oldbot;
240 #if HILITE_SEARCH
241 extern int hilite_search;
242 #endif
243
244 #ifndef HAVE_TERMCAP_H
245 extern char *tgetstr();
246 extern char *tgoto();
247 #endif
248
249
250 /*
251 * Change terminal to "raw mode", or restore to "normal" mode.
252 * "Raw mode" means
253 * 1. An outstanding read will complete on receipt of a single keystroke.
254 * 2. Input is not echoed.
255 * 3. On output, \n is mapped to \r\n.
256 * 4. \t is NOT expanded into spaces.
257 * 5. Signal-causing characters such as ctrl-C (interrupt),
258 * etc. are NOT disabled.
259 * It doesn't matter whether an input \n is mapped to \r, or vice versa.
260 */
261 public void
262 raw_mode(on)
263 int on;
264 {
265 static int curr_on = 0;
266
267 if (on == curr_on)
268 return;
269 erase2_char = '\b'; /* in case OS doesn't know about erase2 */
270 #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS
271 {
272 struct termios s;
273 static struct termios save_term;
274 static int saved_term = 0;
275
276 if (on)
277 {
278 /*
279 * Get terminal modes.
280 */
281 tcgetattr(tty, &s);
282
283 /*
284 * Save modes and set certain variables dependent on modes.
285 */
286 if (!saved_term)
287 {
288 save_term = s;
289 saved_term = 1;
290 }
291 #if HAVE_OSPEED
292 switch (cfgetospeed(&s))
293 {
294 #ifdef B0
295 case B0: ospeed = 0; break;
296 #endif
297 #ifdef B50
298 case B50: ospeed = 1; break;
299 #endif
300 #ifdef B75
301 case B75: ospeed = 2; break;
302 #endif
303 #ifdef B110
304 case B110: ospeed = 3; break;
305 #endif
306 #ifdef B134
307 case B134: ospeed = 4; break;
308 #endif
309 #ifdef B150
310 case B150: ospeed = 5; break;
311 #endif
312 #ifdef B200
313 case B200: ospeed = 6; break;
314 #endif
315 #ifdef B300
316 case B300: ospeed = 7; break;
317 #endif
318 #ifdef B600
319 case B600: ospeed = 8; break;
320 #endif
321 #ifdef B1200
322 case B1200: ospeed = 9; break;
323 #endif
324 #ifdef B1800
325 case B1800: ospeed = 10; break;
326 #endif
327 #ifdef B2400
328 case B2400: ospeed = 11; break;
329 #endif
330 #ifdef B4800
331 case B4800: ospeed = 12; break;
332 #endif
333 #ifdef B9600
334 case B9600: ospeed = 13; break;
335 #endif
336 #ifdef EXTA
337 case EXTA: ospeed = 14; break;
338 #endif
339 #ifdef EXTB
340 case EXTB: ospeed = 15; break;
341 #endif
342 #ifdef B57600
343 case B57600: ospeed = 16; break;
344 #endif
345 #ifdef B115200
346 case B115200: ospeed = 17; break;
347 #endif
348 default: ;
349 }
350 #endif
351 erase_char = s.c_cc[VERASE];
352 #ifdef VERASE2
353 erase2_char = s.c_cc[VERASE2];
354 #endif
355 kill_char = s.c_cc[VKILL];
356 #ifdef VWERASE
357 werase_char = s.c_cc[VWERASE];
358 #else
359 werase_char = CONTROL('W');
360 #endif
361
362 /*
363 * Set the modes to the way we want them.
364 */
365 s.c_lflag &= ~(0
366 #ifdef ICANON
367 | ICANON
368 #endif
369 #ifdef ECHO
370 | ECHO
371 #endif
372 #ifdef ECHOE
373 | ECHOE
374 #endif
375 #ifdef ECHOK
376 | ECHOK
377 #endif
378 #if ECHONL
379 | ECHONL
380 #endif
381 );
382
383 s.c_oflag |= (0
384 #ifdef OXTABS
385 | OXTABS
386 #else
387 #ifdef TAB3
388 | TAB3
389 #else
390 #ifdef XTABS
391 | XTABS
392 #endif
393 #endif
394 #endif
395 #ifdef OPOST
396 | OPOST
397 #endif
398 #ifdef ONLCR
399 | ONLCR
400 #endif
401 );
402
403 s.c_oflag &= ~(0
404 #ifdef ONOEOT
405 | ONOEOT
406 #endif
407 #ifdef OCRNL
408 | OCRNL
409 #endif
410 #ifdef ONOCR
411 | ONOCR
412 #endif
413 #ifdef ONLRET
414 | ONLRET
415 #endif
416 );
417 s.c_cc[VMIN] = 1;
418 s.c_cc[VTIME] = 0;
419 #ifdef VLNEXT
420 s.c_cc[VLNEXT] = 0;
421 #endif
422 #ifdef VDSUSP
423 s.c_cc[VDSUSP] = 0;
424 #endif
425 #if MUST_SET_LINE_DISCIPLINE
426 /*
427 * System's termios is broken; need to explicitly
428 * request TERMIODISC line discipline.
429 */
430 s.c_line = TERMIODISC;
431 #endif
432 } else
433 {
434 /*
435 * Restore saved modes.
436 */
437 s = save_term;
438 }
439 #if HAVE_FSYNC
440 fsync(tty);
441 #endif
442 tcsetattr(tty, TCSADRAIN, &s);
443 #if MUST_SET_LINE_DISCIPLINE
444 if (!on)
445 {
446 /*
447 * Broken termios *ignores* any line discipline
448 * except TERMIODISC. A different old line discipline
449 * is therefore not restored, yet. Restore the old
450 * line discipline by hand.
451 */
452 ioctl(tty, TIOCSETD, &save_term.c_line);
453 }
454 #endif
455 }
456 #else
457 #ifdef TCGETA
458 {
459 struct termio s;
460 static struct termio save_term;
461 static int saved_term = 0;
462
463 if (on)
464 {
465 /*
466 * Get terminal modes.
467 */
468 ioctl(tty, TCGETA, &s);
469
470 /*
471 * Save modes and set certain variables dependent on modes.
472 */
473 if (!saved_term)
474 {
475 save_term = s;
476 saved_term = 1;
477 }
478 #if HAVE_OSPEED
479 ospeed = s.c_cflag & CBAUD;
480 #endif
481 erase_char = s.c_cc[VERASE];
482 kill_char = s.c_cc[VKILL];
483 #ifdef VWERASE
484 werase_char = s.c_cc[VWERASE];
485 #else
486 werase_char = CONTROL('W');
487 #endif
488
489 /*
490 * Set the modes to the way we want them.
491 */
492 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL);
493 s.c_oflag |= (OPOST|ONLCR|TAB3);
494 s.c_oflag &= ~(OCRNL|ONOCR|ONLRET);
495 s.c_cc[VMIN] = 1;
496 s.c_cc[VTIME] = 0;
497 } else
498 {
499 /*
500 * Restore saved modes.
501 */
502 s = save_term;
503 }
504 ioctl(tty, TCSETAW, &s);
505 }
506 #else
507 #ifdef TIOCGETP
508 {
509 struct sgttyb s;
510 static struct sgttyb save_term;
511 static int saved_term = 0;
512
513 if (on)
514 {
515 /*
516 * Get terminal modes.
517 */
518 ioctl(tty, TIOCGETP, &s);
519
520 /*
521 * Save modes and set certain variables dependent on modes.
522 */
523 if (!saved_term)
524 {
525 save_term = s;
526 saved_term = 1;
527 }
528 #if HAVE_OSPEED
529 ospeed = s.sg_ospeed;
530 #endif
531 erase_char = s.sg_erase;
532 kill_char = s.sg_kill;
533 werase_char = CONTROL('W');
534
535 /*
536 * Set the modes to the way we want them.
537 */
538 s.sg_flags |= CBREAK;
539 s.sg_flags &= ~(ECHO|XTABS);
540 } else
541 {
542 /*
543 * Restore saved modes.
544 */
545 s = save_term;
546 }
547 ioctl(tty, TIOCSETN, &s);
548 }
549 #else
550 #ifdef _OSK
551 {
552 struct sgbuf s;
553 static struct sgbuf save_term;
554 static int saved_term = 0;
555
556 if (on)
557 {
558 /*
559 * Get terminal modes.
560 */
561 _gs_opt(tty, &s);
562
563 /*
564 * Save modes and set certain variables dependent on modes.
565 */
566 if (!saved_term)
567 {
568 save_term = s;
569 saved_term = 1;
570 }
571 erase_char = s.sg_bspch;
572 kill_char = s.sg_dlnch;
573 werase_char = CONTROL('W');
574
575 /*
576 * Set the modes to the way we want them.
577 */
578 s.sg_echo = 0;
579 s.sg_eofch = 0;
580 s.sg_pause = 0;
581 s.sg_psch = 0;
582 } else
583 {
584 /*
585 * Restore saved modes.
586 */
587 s = save_term;
588 }
589 _ss_opt(tty, &s);
590 }
591 #else
592 /* MS-DOS, Windows, or OS2 */
593 #if OS2
594 /* OS2 */
595 LSIGNAL(SIGINT, SIG_IGN);
596 #endif
597 erase_char = '\b';
598 #if MSDOS_COMPILER==DJGPPC
599 kill_char = CONTROL('U');
600 /*
601 * So that when we shell out or run another program, its
602 * stdin is in cooked mode. We do not switch stdin to binary
603 * mode if fd0 is zero, since that means we were called before
604 * tty was reopened in open_getchr, in which case we would be
605 * changing the original stdin device outside less.
606 */
607 if (fd0 != 0)
608 setmode(0, on ? O_BINARY : O_TEXT);
609 #else
610 kill_char = ESC;
611 #endif
612 werase_char = CONTROL('W');
613 #endif
614 #endif
615 #endif
616 #endif
617 curr_on = on;
618 }
619
620 #if !MSDOS_COMPILER
621 /*
622 * Some glue to prevent calling termcap functions if tgetent() failed.
623 */
624 static int hardcopy;
625
626 static char *
627 ltget_env(capname)
628 char *capname;
629 {
630 char name[16];
631 char *s;
632
633 s = lgetenv("LESS_TERMCAP_DEBUG");
634 if (s != NULL && *s != '\0')
635 {
636 struct env { struct env *next; char *name; char *value; };
637 static struct env *envs = NULL;
638 struct env *p;
639 for (p = envs; p != NULL; p = p->next)
640 if (strcmp(p->name, capname) == 0)
641 return p->value;
642 p = (struct env *) ecalloc(1, sizeof(struct env));
643 p->name = save(capname);
644 p->value = (char *) ecalloc(strlen(capname)+3, sizeof(char));
645 sprintf(p->value, "<%s>", capname);
646 p->next = envs;
647 envs = p;
648 return p->value;
649 }
650 strcpy(name, "LESS_TERMCAP_");
651 strcat(name, capname);
652 return (lgetenv(name));
653 }
654
655 static int
656 ltgetflag(capname)
657 char *capname;
658 {
659 char *s;
660
661 if ((s = ltget_env(capname)) != NULL)
662 return (*s != '\0' && *s != '0');
663 if (hardcopy)
664 return (0);
665 return (tgetflag(capname));
666 }
667
668 static int
669 ltgetnum(capname)
670 char *capname;
671 {
672 char *s;
673
674 if ((s = ltget_env(capname)) != NULL)
675 return (atoi(s));
676 if (hardcopy)
677 return (-1);
678 return (tgetnum(capname));
679 }
680
681 static char *
682 ltgetstr(capname, pp)
683 char *capname;
684 char **pp;
685 {
686 char *s;
687
688 if ((s = ltget_env(capname)) != NULL)
689 return (s);
690 if (hardcopy)
691 return (NULL);
692 return (tgetstr(capname, pp));
693 }
694 #endif /* MSDOS_COMPILER */
695
696 /*
697 * Get size of the output screen.
698 */
699 public void
700 scrsize()
701 {
702 register char *s;
703 int sys_height;
704 int sys_width;
705 #if !MSDOS_COMPILER
706 int n;
707 #endif
708
709 #define DEF_SC_WIDTH 80
710 #if MSDOS_COMPILER
711 #define DEF_SC_HEIGHT 25
712 #else
713 #define DEF_SC_HEIGHT 24
714 #endif
715
716
717 sys_width = sys_height = 0;
718
719 #if MSDOS_COMPILER==MSOFTC
720 {
721 struct videoconfig w;
722 _getvideoconfig(&w);
723 sys_height = w.numtextrows;
724 sys_width = w.numtextcols;
725 }
726 #else
727 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
728 {
729 struct text_info w;
730 gettextinfo(&w);
731 sys_height = w.screenheight;
732 sys_width = w.screenwidth;
733 }
734 #else
735 #if MSDOS_COMPILER==WIN32C
736 {
737 CONSOLE_SCREEN_BUFFER_INFO scr;
738 GetConsoleScreenBufferInfo(con_out, &scr);
739 sys_height = scr.srWindow.Bottom - scr.srWindow.Top + 1;
740 sys_width = scr.srWindow.Right - scr.srWindow.Left + 1;
741 }
742 #else
743 #if OS2
744 {
745 int s[2];
746 _scrsize(s);
747 sys_width = s[0];
748 sys_height = s[1];
749 /*
750 * When using terminal emulators for XFree86/OS2, the
751 * _scrsize function does not work well.
752 * Call the scrsize.exe program to get the window size.
753 */
754 windowid = getenv("WINDOWID");
755 if (windowid != NULL)
756 {
757 FILE *fd = popen("scrsize", "rt");
758 if (fd != NULL)
759 {
760 int w, h;
761 fscanf(fd, "%i %i", &w, &h);
762 if (w > 0 && h > 0)
763 {
764 sys_width = w;
765 sys_height = h;
766 }
767 pclose(fd);
768 }
769 }
770 }
771 #else
772 #ifdef TIOCGWINSZ
773 {
774 struct winsize w;
775 if (ioctl(2, TIOCGWINSZ, &w) == 0)
776 {
777 if (w.ws_row > 0)
778 sys_height = w.ws_row;
779 if (w.ws_col > 0)
780 sys_width = w.ws_col;
781 }
782 }
783 #else
784 #ifdef WIOCGETD
785 {
786 struct uwdata w;
787 if (ioctl(2, WIOCGETD, &w) == 0)
788 {
789 if (w.uw_height > 0)
790 sys_height = w.uw_height / w.uw_vs;
791 if (w.uw_width > 0)
792 sys_width = w.uw_width / w.uw_hs;
793 }
794 }
795 #endif
796 #endif
797 #endif
798 #endif
799 #endif
800 #endif
801
802 if (sys_height > 0)
803 sc_height = sys_height;
804 else if ((s = lgetenv("LINES")) != NULL)
805 sc_height = atoi(s);
806 #if !MSDOS_COMPILER
807 else if ((n = ltgetnum("li")) > 0)
808 sc_height = n;
809 #endif
810 if (sc_height <= 0)
811 sc_height = DEF_SC_HEIGHT;
812
813 if (sys_width > 0)
814 sc_width = sys_width;
815 else if ((s = lgetenv("COLUMNS")) != NULL)
816 sc_width = atoi(s);
817 #if !MSDOS_COMPILER
818 else if ((n = ltgetnum("co")) > 0)
819 sc_width = n;
820 #endif
821 if (sc_width <= 0)
822 sc_width = DEF_SC_WIDTH;
823 }
824
825 #if MSDOS_COMPILER==MSOFTC
826 /*
827 * Figure out how many empty loops it takes to delay a millisecond.
828 */
829 static void
830 get_clock()
831 {
832 clock_t start;
833
834 /*
835 * Get synchronized at the start of a tick.
836 */
837 start = clock();
838 while (clock() == start)
839 ;
840 /*
841 * Now count loops till the next tick.
842 */
843 start = clock();
844 msec_loops = 0;
845 while (clock() == start)
846 msec_loops++;
847 /*
848 * Convert from (loops per clock) to (loops per millisecond).
849 */
850 msec_loops *= CLOCKS_PER_SEC;
851 msec_loops /= 1000;
852 }
853
854 /*
855 * Delay for a specified number of milliseconds.
856 */
857 static void
858 dummy_func()
859 {
860 static long delay_dummy = 0;
861 delay_dummy++;
862 }
863
864 static void
865 delay(msec)
866 int msec;
867 {
868 long i;
869
870 while (msec-- > 0)
871 {
872 for (i = 0; i < msec_loops; i++)
873 {
874 /*
875 * Make it look like we're doing something here,
876 * so the optimizer doesn't remove the whole loop.
877 */
878 dummy_func();
879 }
880 }
881 }
882 #endif
883
884 /*
885 * Return the characters actually input by a "special" key.
886 */
887 public char *
888 special_key_str(key)
889 int key;
890 {
891 static char tbuf[40];
892 char *s;
893 #if MSDOS_COMPILER || OS2
894 static char k_right[] = { '\340', PCK_RIGHT, 0 };
895 static char k_left[] = { '\340', PCK_LEFT, 0 };
896 static char k_ctl_right[] = { '\340', PCK_CTL_RIGHT, 0 };
897 static char k_ctl_left[] = { '\340', PCK_CTL_LEFT, 0 };
898 static char k_insert[] = { '\340', PCK_INSERT, 0 };
899 static char k_delete[] = { '\340', PCK_DELETE, 0 };
900 static char k_ctl_delete[] = { '\340', PCK_CTL_DELETE, 0 };
901 static char k_ctl_backspace[] = { '\177', 0 };
902 static char k_home[] = { '\340', PCK_HOME, 0 };
903 static char k_end[] = { '\340', PCK_END, 0 };
904 static char k_up[] = { '\340', PCK_UP, 0 };
905 static char k_down[] = { '\340', PCK_DOWN, 0 };
906 static char k_backtab[] = { '\340', PCK_SHIFT_TAB, 0 };
907 static char k_pagedown[] = { '\340', PCK_PAGEDOWN, 0 };
908 static char k_pageup[] = { '\340', PCK_PAGEUP, 0 };
909 static char k_f1[] = { '\340', PCK_F1, 0 };
910 #endif
911 #if !MSDOS_COMPILER
912 char *sp = tbuf;
913 #endif
914
915 switch (key)
916 {
917 #if OS2
918 /*
919 * If windowid is not NULL, assume less is executed in
920 * the XFree86 environment.
921 */
922 case SK_RIGHT_ARROW:
923 s = windowid ? ltgetstr("kr", &sp) : k_right;
924 break;
925 case SK_LEFT_ARROW:
926 s = windowid ? ltgetstr("kl", &sp) : k_left;
927 break;
928 case SK_UP_ARROW:
929 s = windowid ? ltgetstr("ku", &sp) : k_up;
930 break;
931 case SK_DOWN_ARROW:
932 s = windowid ? ltgetstr("kd", &sp) : k_down;
933 break;
934 case SK_PAGE_UP:
935 s = windowid ? ltgetstr("kP", &sp) : k_pageup;
936 break;
937 case SK_PAGE_DOWN:
938 s = windowid ? ltgetstr("kN", &sp) : k_pagedown;
939 break;
940 case SK_HOME:
941 s = windowid ? ltgetstr("kh", &sp) : k_home;
942 break;
943 case SK_END:
944 s = windowid ? ltgetstr("@7", &sp) : k_end;
945 break;
946 case SK_DELETE:
947 if (windowid)
948 {
949 s = ltgetstr("kD", &sp);
950 if (s == NULL)
951 {
952 tbuf[0] = '\177';
953 tbuf[1] = '\0';
954 s = tbuf;
955 }
956 } else
957 s = k_delete;
958 break;
959 #endif
960 #if MSDOS_COMPILER
961 case SK_RIGHT_ARROW:
962 s = k_right;
963 break;
964 case SK_LEFT_ARROW:
965 s = k_left;
966 break;
967 case SK_UP_ARROW:
968 s = k_up;
969 break;
970 case SK_DOWN_ARROW:
971 s = k_down;
972 break;
973 case SK_PAGE_UP:
974 s = k_pageup;
975 break;
976 case SK_PAGE_DOWN:
977 s = k_pagedown;
978 break;
979 case SK_HOME:
980 s = k_home;
981 break;
982 case SK_END:
983 s = k_end;
984 break;
985 case SK_DELETE:
986 s = k_delete;
987 break;
988 #endif
989 #if MSDOS_COMPILER || OS2
990 case SK_INSERT:
991 s = k_insert;
992 break;
993 case SK_CTL_LEFT_ARROW:
994 s = k_ctl_left;
995 break;
996 case SK_CTL_RIGHT_ARROW:
997 s = k_ctl_right;
998 break;
999 case SK_CTL_BACKSPACE:
1000 s = k_ctl_backspace;
1001 break;
1002 case SK_CTL_DELETE:
1003 s = k_ctl_delete;
1004 break;
1005 case SK_F1:
1006 s = k_f1;
1007 break;
1008 case SK_BACKTAB:
1009 s = k_backtab;
1010 break;
1011 #else
1012 case SK_RIGHT_ARROW:
1013 s = ltgetstr("kr", &sp);
1014 break;
1015 case SK_LEFT_ARROW:
1016 s = ltgetstr("kl", &sp);
1017 break;
1018 case SK_UP_ARROW:
1019 s = ltgetstr("ku", &sp);
1020 break;
1021 case SK_DOWN_ARROW:
1022 s = ltgetstr("kd", &sp);
1023 break;
1024 case SK_PAGE_UP:
1025 s = ltgetstr("kP", &sp);
1026 break;
1027 case SK_PAGE_DOWN:
1028 s = ltgetstr("kN", &sp);
1029 break;
1030 case SK_HOME:
1031 s = ltgetstr("kh", &sp);
1032 break;
1033 case SK_END:
1034 s = ltgetstr("@7", &sp);
1035 break;
1036 case SK_DELETE:
1037 s = ltgetstr("kD", &sp);
1038 if (s == NULL)
1039 {
1040 tbuf[0] = '\177';
1041 tbuf[1] = '\0';
1042 s = tbuf;
1043 }
1044 break;
1045 #endif
1046 case SK_CONTROL_K:
1047 tbuf[0] = CONTROL('K');
1048 tbuf[1] = '\0';
1049 s = tbuf;
1050 break;
1051 default:
1052 return (NULL);
1053 }
1054 return (s);
1055 }
1056
1057 /*
1058 * Get terminal capabilities via termcap.
1059 */
1060 public void
1061 get_term()
1062 {
1063 #if MSDOS_COMPILER
1064 auto_wrap = 1;
1065 ignaw = 0;
1066 can_goto_line = 1;
1067 clear_bg = 1;
1068 /*
1069 * Set up default colors.
1070 * The xx_s_width and xx_e_width vars are already initialized to 0.
1071 */
1072 #if MSDOS_COMPILER==MSOFTC
1073 sy_bg_color = _getbkcolor();
1074 sy_fg_color = _gettextcolor();
1075 get_clock();
1076 #else
1077 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1078 {
1079 struct text_info w;
1080 gettextinfo(&w);
1081 sy_bg_color = (w.attribute >> 4) & 0x0F;
1082 sy_fg_color = (w.attribute >> 0) & 0x0F;
1083 }
1084 #else
1085 #if MSDOS_COMPILER==WIN32C
1086 {
1087 DWORD nread;
1088 CONSOLE_SCREEN_BUFFER_INFO scr;
1089
1090 con_out_save = con_out = GetStdHandle(STD_OUTPUT_HANDLE);
1091 /*
1092 * Always open stdin in binary. Note this *must* be done
1093 * before any file operations have been done on fd0.
1094 */
1095 SET_BINARY(0);
1096 GetConsoleScreenBufferInfo(con_out, &scr);
1097 ReadConsoleOutputAttribute(con_out, &curr_attr,
1098 1, scr.dwCursorPosition, &nread);
1099 sy_bg_color = (curr_attr & BG_COLORS) >> 4; /* normalize */
1100 sy_fg_color = curr_attr & FG_COLORS;
1101 }
1102 #endif
1103 #endif
1104 #endif
1105 nm_fg_color = sy_fg_color;
1106 nm_bg_color = sy_bg_color;
1107 bo_fg_color = 11;
1108 bo_bg_color = 0;
1109 ul_fg_color = 9;
1110 ul_bg_color = 0;
1111 so_fg_color = 15;
1112 so_bg_color = 9;
1113 bl_fg_color = 15;
1114 bl_bg_color = 0;
1115
1116 /*
1117 * Get size of the screen.
1118 */
1119 scrsize();
1120 pos_init();
1121
1122
1123 #else /* !MSDOS_COMPILER */
1124
1125 char *sp;
1126 register char *t1, *t2;
1127 char *term;
1128 char termbuf[TERMBUF_SIZE];
1129
1130 static char sbuf[TERMSBUF_SIZE];
1131
1132 #if OS2
1133 /*
1134 * Make sure the termcap database is available.
1135 */
1136 sp = lgetenv("TERMCAP");
1137 if (sp == NULL || *sp == '\0')
1138 {
1139 char *termcap;
1140 if ((sp = homefile("termcap.dat")) != NULL)
1141 {
1142 termcap = (char *) ecalloc(strlen(sp)+9, sizeof(char));
1143 sprintf(termcap, "TERMCAP=%s", sp);
1144 free(sp);
1145 putenv(termcap);
1146 }
1147 }
1148 #endif
1149 /*
1150 * Find out what kind of terminal this is.
1151 */
1152 if ((term = lgetenv("TERM")) == NULL)
1153 term = DEFAULT_TERM;
1154 hardcopy = 0;
1155 if (tgetent(termbuf, term) != TGETENT_OK)
1156 hardcopy = 1;
1157 if (ltgetflag("hc"))
1158 hardcopy = 1;
1159
1160 /*
1161 * Get size of the screen.
1162 */
1163 scrsize();
1164 pos_init();
1165
1166 auto_wrap = ltgetflag("am");
1167 ignaw = ltgetflag("xn");
1168 above_mem = ltgetflag("da");
1169 below_mem = ltgetflag("db");
1170 clear_bg = ltgetflag("ut");
1171
1172 /*
1173 * Assumes termcap variable "sg" is the printing width of:
1174 * the standout sequence, the end standout sequence,
1175 * the underline sequence, the end underline sequence,
1176 * the boldface sequence, and the end boldface sequence.
1177 */
1178 if ((so_s_width = ltgetnum("sg")) < 0)
1179 so_s_width = 0;
1180 so_e_width = so_s_width;
1181
1182 bo_s_width = bo_e_width = so_s_width;
1183 ul_s_width = ul_e_width = so_s_width;
1184 bl_s_width = bl_e_width = so_s_width;
1185
1186 #if HILITE_SEARCH
1187 if (so_s_width > 0 || so_e_width > 0)
1188 /*
1189 * Disable highlighting by default on magic cookie terminals.
1190 * Turning on highlighting might change the displayed width
1191 * of a line, causing the display to get messed up.
1192 * The user can turn it back on with -g,
1193 * but she won't like the results.
1194 */
1195 hilite_search = 0;
1196 #endif
1197
1198 /*
1199 * Get various string-valued capabilities.
1200 */
1201 sp = sbuf;
1202
1203 #if HAVE_OSPEED
1204 sc_pad = ltgetstr("pc", &sp);
1205 if (sc_pad != NULL)
1206 PC = *sc_pad;
1207 #endif
1208
1209 sc_s_keypad = ltgetstr("ks", &sp);
1210 if (sc_s_keypad == NULL)
1211 sc_s_keypad = "";
1212 sc_e_keypad = ltgetstr("ke", &sp);
1213 if (sc_e_keypad == NULL)
1214 sc_e_keypad = "";
1215
1216 /*
1217 * This loses for terminals with termcap entries with ti/te strings
1218 * that switch to/from an alternate screen, and we're in quit_at_eof
1219 * (eg, more(1)).
1220 */
1221 if (quit_at_eof != OPT_ONPLUS && !more_mode) {
1222 sc_init = ltgetstr("ti", &sp);
1223 sc_deinit = ltgetstr("te", &sp);
1224 } else {
1225 sc_init = NULL;
1226 sc_deinit = NULL;
1227 }
1228
1229 if (sc_init == NULL)
1230 sc_init = "";
1231 if (sc_deinit == NULL)
1232 sc_deinit = "";
1233
1234 sc_eol_clear = ltgetstr("ce", &sp);
1235 if (sc_eol_clear == NULL || *sc_eol_clear == '\0')
1236 {
1237 missing_cap = 1;
1238 sc_eol_clear = "";
1239 }
1240
1241 sc_eos_clear = ltgetstr("cd", &sp);
1242 if (below_mem && (sc_eos_clear == NULL || *sc_eos_clear == '\0'))
1243 {
1244 missing_cap = 1;
1245 sc_eos_clear = "";
1246 }
1247
1248 sc_clear = ltgetstr("cl", &sp);
1249 if (sc_clear == NULL || *sc_clear == '\0')
1250 {
1251 missing_cap = 1;
1252 sc_clear = "\n\n";
1253 }
1254
1255 sc_move = ltgetstr("cm", &sp);
1256 if (sc_move == NULL || *sc_move == '\0')
1257 {
1258 /*
1259 * This is not an error here, because we don't
1260 * always need sc_move.
1261 * We need it only if we don't have home or lower-left.
1262 */
1263 sc_move = "";
1264 can_goto_line = 0;
1265 } else
1266 can_goto_line = 1;
1267
1268 tmodes("so", "se", &sc_s_in, &sc_s_out, "", "", &sp);
1269 tmodes("us", "ue", &sc_u_in, &sc_u_out, sc_s_in, sc_s_out, &sp);
1270 tmodes("md", "me", &sc_b_in, &sc_b_out, sc_s_in, sc_s_out, &sp);
1271 tmodes("mb", "me", &sc_bl_in, &sc_bl_out, sc_s_in, sc_s_out, &sp);
1272
1273 sc_visual_bell = ltgetstr("vb", &sp);
1274 if (sc_visual_bell == NULL)
1275 sc_visual_bell = "";
1276
1277 if (ltgetflag("bs"))
1278 sc_backspace = "\b";
1279 else
1280 {
1281 sc_backspace = ltgetstr("bc", &sp);
1282 if (sc_backspace == NULL || *sc_backspace == '\0')
1283 sc_backspace = "\b";
1284 }
1285
1286 /*
1287 * Choose between using "ho" and "cm" ("home" and "cursor move")
1288 * to move the cursor to the upper left corner of the screen.
1289 */
1290 t1 = ltgetstr("ho", &sp);
1291 if (t1 == NULL)
1292 t1 = "";
1293 if (*sc_move == '\0')
1294 t2 = "";
1295 else
1296 {
1297 strcpy(sp, tgoto(sc_move, 0, 0));
1298 t2 = sp;
1299 sp += strlen(sp) + 1;
1300 }
1301 sc_home = cheaper(t1, t2, "|\b^");
1302
1303 /*
1304 * Choose between using "ll" and "cm" ("lower left" and "cursor move")
1305 * to move the cursor to the lower left corner of the screen.
1306 */
1307 t1 = ltgetstr("ll", &sp);
1308 if (t1 == NULL)
1309 t1 = "";
1310 if (*sc_move == '\0')
1311 t2 = "";
1312 else
1313 {
1314 strcpy(sp, tgoto(sc_move, 0, sc_height-1));
1315 t2 = sp;
1316 sp += strlen(sp) + 1;
1317 }
1318 sc_lower_left = cheaper(t1, t2, "\r");
1319
1320 /*
1321 * Get carriage return string.
1322 */
1323 sc_return = ltgetstr("cr", &sp);
1324 if (sc_return == NULL)
1325 sc_return = "\r";
1326
1327 /*
1328 * Choose between using "al" or "sr" ("add line" or "scroll reverse")
1329 * to add a line at the top of the screen.
1330 */
1331 t1 = ltgetstr("al", &sp);
1332 if (t1 == NULL)
1333 t1 = "";
1334 t2 = ltgetstr("sr", &sp);
1335 if (t2 == NULL)
1336 t2 = "";
1337 #if OS2
1338 if (*t1 == '\0' && *t2 == '\0')
1339 sc_addline = "";
1340 else
1341 #endif
1342 if (above_mem)
1343 sc_addline = t1;
1344 else
1345 sc_addline = cheaper(t1, t2, "");
1346 if (*sc_addline == '\0')
1347 {
1348 /*
1349 * Force repaint on any backward movement.
1350 */
1351 no_back_scroll = 1;
1352 }
1353 #endif /* MSDOS_COMPILER */
1354 }
1355
1356 #if !MSDOS_COMPILER
1357 /*
1358 * Return the cost of displaying a termcap string.
1359 * We use the trick of calling tputs, but as a char printing function
1360 * we give it inc_costcount, which just increments "costcount".
1361 * This tells us how many chars would be printed by using this string.
1362 * {{ Couldn't we just use strlen? }}
1363 */
1364 static int costcount;
1365
1366 /*ARGSUSED*/
1367 static int
1368 inc_costcount(c)
1369 int c;
1370 {
1371 costcount++;
1372 return (c);
1373 }
1374
1375 static int
1376 cost(t)
1377 char *t;
1378 {
1379 costcount = 0;
1380 tputs(t, sc_height, inc_costcount);
1381 return (costcount);
1382 }
1383
1384 /*
1385 * Return the "best" of the two given termcap strings.
1386 * The best, if both exist, is the one with the lower
1387 * cost (see cost() function).
1388 */
1389 static char *
1390 cheaper(t1, t2, def)
1391 char *t1, *t2;
1392 char *def;
1393 {
1394 if (*t1 == '\0' && *t2 == '\0')
1395 {
1396 missing_cap = 1;
1397 return (def);
1398 }
1399 if (*t1 == '\0')
1400 return (t2);
1401 if (*t2 == '\0')
1402 return (t1);
1403 if (cost(t1) < cost(t2))
1404 return (t1);
1405 return (t2);
1406 }
1407
1408 static void
1409 tmodes(incap, outcap, instr, outstr, def_instr, def_outstr, spp)
1410 char *incap;
1411 char *outcap;
1412 char **instr;
1413 char **outstr;
1414 char *def_instr;
1415 char *def_outstr;
1416 char **spp;
1417 {
1418 *instr = ltgetstr(incap, spp);
1419 if (*instr == NULL)
1420 {
1421 /* Use defaults. */
1422 *instr = def_instr;
1423 *outstr = def_outstr;
1424 return;
1425 }
1426
1427 *outstr = ltgetstr(outcap, spp);
1428 if (*outstr == NULL)
1429 /* No specific out capability; use "me". */
1430 *outstr = ltgetstr("me", spp);
1431 if (*outstr == NULL)
1432 /* Don't even have "me"; use a null string. */
1433 *outstr = "";
1434 }
1435
1436 #endif /* MSDOS_COMPILER */
1437
1438
1439 /*
1440 * Below are the functions which perform all the
1441 * terminal-specific screen manipulation.
1442 */
1443
1444
1445 #if MSDOS_COMPILER
1446
1447 #if MSDOS_COMPILER==WIN32C
1448 static void
1449 _settextposition(int row, int col)
1450 {
1451 COORD cpos;
1452 CONSOLE_SCREEN_BUFFER_INFO csbi;
1453
1454 GetConsoleScreenBufferInfo(con_out, &csbi);
1455 cpos.X = csbi.srWindow.Left + (col - 1);
1456 cpos.Y = csbi.srWindow.Top + (row - 1);
1457 SetConsoleCursorPosition(con_out, cpos);
1458 }
1459 #endif
1460
1461 /*
1462 * Initialize the screen to the correct color at startup.
1463 */
1464 static void
1465 initcolor()
1466 {
1467 SETCOLORS(nm_fg_color, nm_bg_color);
1468 #if 0
1469 /*
1470 * This clears the screen at startup. This is different from
1471 * the behavior of other versions of less. Disable it for now.
1472 */
1473 char *blanks;
1474 int row;
1475 int col;
1476
1477 /*
1478 * Create a complete, blank screen using "normal" colors.
1479 */
1480 SETCOLORS(nm_fg_color, nm_bg_color);
1481 blanks = (char *) ecalloc(width+1, sizeof(char));
1482 for (col = 0; col < sc_width; col++)
1483 blanks[col] = ' ';
1484 blanks[sc_width] = '\0';
1485 for (row = 0; row < sc_height; row++)
1486 _outtext(blanks);
1487 free(blanks);
1488 #endif
1489 }
1490 #endif
1491
1492 #if MSDOS_COMPILER==WIN32C
1493
1494 /*
1495 * Termcap-like init with a private win32 console.
1496 */
1497 static void
1498 win32_init_term()
1499 {
1500 CONSOLE_SCREEN_BUFFER_INFO scr;
1501 COORD size;
1502
1503 if (con_out_save == INVALID_HANDLE_VALUE)
1504 return;
1505
1506 GetConsoleScreenBufferInfo(con_out_save, &scr);
1507
1508 if (con_out_ours == INVALID_HANDLE_VALUE)
1509 {
1510 /*
1511 * Create our own screen buffer, so that we
1512 * may restore the original when done.
1513 */
1514 con_out_ours = CreateConsoleScreenBuffer(
1515 GENERIC_WRITE | GENERIC_READ,
1516 FILE_SHARE_WRITE | FILE_SHARE_READ,
1517 (LPSECURITY_ATTRIBUTES) NULL,
1518 CONSOLE_TEXTMODE_BUFFER,
1519 (LPVOID) NULL);
1520 }
1521
1522 size.X = scr.srWindow.Right - scr.srWindow.Left + 1;
1523 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1;
1524 SetConsoleScreenBufferSize(con_out_ours, size);
1525 SetConsoleActiveScreenBuffer(con_out_ours);
1526 con_out = con_out_ours;
1527 }
1528
1529 /*
1530 * Restore the startup console.
1531 */
1532 static void
1533 win32_deinit_term()
1534 {
1535 if (con_out_save == INVALID_HANDLE_VALUE)
1536 return;
1537 if (quitting)
1538 (void) CloseHandle(con_out_ours);
1539 SetConsoleActiveScreenBuffer(con_out_save);
1540 con_out = con_out_save;
1541 }
1542
1543 #endif
1544
1545 /*
1546 * Initialize terminal
1547 */
1548 public void
1549 init()
1550 {
1551 #if !MSDOS_COMPILER
1552 if (!no_init)
1553 tputs(sc_init, sc_height, putchr);
1554 if (!no_keypad)
1555 tputs(sc_s_keypad, sc_height, putchr);
1556 if (top_scroll)
1557 {
1558 int i;
1559
1560 /*
1561 * This is nice to terminals with no alternate screen,
1562 * but with saved scrolled-off-the-top lines. This way,
1563 * no previous line is lost, but we start with a whole
1564 * screen to ourself.
1565 */
1566 for (i = 1; i < sc_height; i++)
1567 putchr('\n');
1568 } else
1569 line_left();
1570 #else
1571 #if MSDOS_COMPILER==WIN32C
1572 if (!no_init)
1573 win32_init_term();
1574 #endif
1575 initcolor();
1576 flush();
1577 #endif
1578 init_done = 1;
1579 }
1580
1581 /*
1582 * Deinitialize terminal
1583 */
1584 public void
1585 deinit()
1586 {
1587 if (!init_done)
1588 return;
1589 #if !MSDOS_COMPILER
1590 if (!no_keypad)
1591 tputs(sc_e_keypad, sc_height, putchr);
1592 if (!no_init)
1593 tputs(sc_deinit, sc_height, putchr);
1594 #else
1595 /* Restore system colors. */
1596 SETCOLORS(sy_fg_color, sy_bg_color);
1597 #if MSDOS_COMPILER==WIN32C
1598 if (!no_init)
1599 win32_deinit_term();
1600 #else
1601 /* Need clreol to make SETCOLORS take effect. */
1602 clreol();
1603 #endif
1604 #endif
1605 init_done = 0;
1606 }
1607
1608 /*
1609 * Home cursor (move to upper left corner of screen).
1610 */
1611 public void
1612 home()
1613 {
1614 #if !MSDOS_COMPILER
1615 tputs(sc_home, 1, putchr);
1616 #else
1617 flush();
1618 _settextposition(1,1);
1619 #endif
1620 }
1621
1622 /*
1623 * Add a blank line (called with cursor at home).
1624 * Should scroll the display down.
1625 */
1626 public void
1627 add_line()
1628 {
1629 #if !MSDOS_COMPILER
1630 tputs(sc_addline, sc_height, putchr);
1631 #else
1632 flush();
1633 #if MSDOS_COMPILER==MSOFTC
1634 _scrolltextwindow(_GSCROLLDOWN);
1635 _settextposition(1,1);
1636 #else
1637 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1638 movetext(1,1, sc_width,sc_height-1, 1,2);
1639 gotoxy(1,1);
1640 clreol();
1641 #else
1642 #if MSDOS_COMPILER==WIN32C
1643 {
1644 CHAR_INFO fillchar;
1645 SMALL_RECT rcSrc, rcClip;
1646 COORD new_org;
1647 CONSOLE_SCREEN_BUFFER_INFO csbi;
1648
1649 GetConsoleScreenBufferInfo(con_out,&csbi);
1650
1651 /* The clip rectangle is the entire visible screen. */
1652 rcClip.Left = csbi.srWindow.Left;
1653 rcClip.Top = csbi.srWindow.Top;
1654 rcClip.Right = csbi.srWindow.Right;
1655 rcClip.Bottom = csbi.srWindow.Bottom;
1656
1657 /* The source rectangle is the visible screen minus the last line. */
1658 rcSrc = rcClip;
1659 rcSrc.Bottom--;
1660
1661 /* Move the top left corner of the source window down one row. */
1662 new_org.X = rcSrc.Left;
1663 new_org.Y = rcSrc.Top + 1;
1664
1665 /* Fill the right character and attributes. */
1666 fillchar.Char.AsciiChar = ' ';
1667 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
1668 fillchar.Attributes = curr_attr;
1669 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
1670 _settextposition(1,1);
1671 }
1672 #endif
1673 #endif
1674 #endif
1675 #endif
1676 }
1677
1678 #if 0
1679 /*
1680 * Remove the n topmost lines and scroll everything below it in the
1681 * window upward. This is needed to stop leaking the topmost line
1682 * into the scrollback buffer when we go down-one-line (in WIN32).
1683 */
1684 public void
1685 remove_top(n)
1686 int n;
1687 {
1688 #if MSDOS_COMPILER==WIN32C
1689 SMALL_RECT rcSrc, rcClip;
1690 CHAR_INFO fillchar;
1691 COORD new_org;
1692 CONSOLE_SCREEN_BUFFER_INFO csbi; /* to get buffer info */
1693
1694 if (n >= sc_height - 1)
1695 {
1696 clear();
1697 home();
1698 return;
1699 }
1700
1701 flush();
1702
1703 GetConsoleScreenBufferInfo(con_out, &csbi);
1704
1705 /* Get the extent of all-visible-rows-but-the-last. */
1706 rcSrc.Left = csbi.srWindow.Left;
1707 rcSrc.Top = csbi.srWindow.Top + n;
1708 rcSrc.Right = csbi.srWindow.Right;
1709 rcSrc.Bottom = csbi.srWindow.Bottom;
1710
1711 /* Get the clip rectangle. */
1712 rcClip.Left = rcSrc.Left;
1713 rcClip.Top = csbi.srWindow.Top;
1714 rcClip.Right = rcSrc.Right;
1715 rcClip.Bottom = rcSrc.Bottom ;
1716
1717 /* Move the source window up n rows. */
1718 new_org.X = rcSrc.Left;
1719 new_org.Y = rcSrc.Top - n;
1720
1721 /* Fill the right character and attributes. */
1722 fillchar.Char.AsciiChar = ' ';
1723 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
1724 fillchar.Attributes = curr_attr;
1725
1726 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
1727
1728 /* Position cursor on first blank line. */
1729 goto_line(sc_height - n - 1);
1730 #endif
1731 }
1732 #endif
1733
1734 #if MSDOS_COMPILER==WIN32C
1735 /*
1736 * Clear the screen.
1737 */
1738 static void
1739 win32_clear()
1740 {
1741 /*
1742 * This will clear only the currently visible rows of the NT
1743 * console buffer, which means none of the precious scrollback
1744 * rows are touched making for faster scrolling. Note that, if
1745 * the window has fewer columns than the console buffer (i.e.
1746 * there is a horizontal scrollbar as well), the entire width
1747 * of the visible rows will be cleared.
1748 */
1749 COORD topleft;
1750 DWORD nchars;
1751 DWORD winsz;
1752 CONSOLE_SCREEN_BUFFER_INFO csbi;
1753
1754 /* get the number of cells in the current buffer */
1755 GetConsoleScreenBufferInfo(con_out, &csbi);
1756 winsz = csbi.dwSize.X * (csbi.srWindow.Bottom - csbi.srWindow.Top + 1);
1757 topleft.X = 0;
1758 topleft.Y = csbi.srWindow.Top;
1759
1760 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
1761 FillConsoleOutputCharacter(con_out, ' ', winsz, topleft, &nchars);
1762 FillConsoleOutputAttribute(con_out, curr_attr, winsz, topleft, &nchars);
1763 }
1764
1765 /*
1766 * Remove the n topmost lines and scroll everything below it in the
1767 * window upward.
1768 */
1769 public void
1770 win32_scroll_up(n)
1771 int n;
1772 {
1773 SMALL_RECT rcSrc, rcClip;
1774 CHAR_INFO fillchar;
1775 COORD topleft;
1776 COORD new_org;
1777 DWORD nchars;
1778 DWORD size;
1779 CONSOLE_SCREEN_BUFFER_INFO csbi;
1780
1781 if (n <= 0)
1782 return;
1783
1784 if (n >= sc_height - 1)
1785 {
1786 win32_clear();
1787 _settextposition(1,1);
1788 return;
1789 }
1790
1791 /* Get the extent of what will remain visible after scrolling. */
1792 GetConsoleScreenBufferInfo(con_out, &csbi);
1793 rcSrc.Left = csbi.srWindow.Left;
1794 rcSrc.Top = csbi.srWindow.Top + n;
1795 rcSrc.Right = csbi.srWindow.Right;
1796 rcSrc.Bottom = csbi.srWindow.Bottom;
1797
1798 /* Get the clip rectangle. */
1799 rcClip.Left = rcSrc.Left;
1800 rcClip.Top = csbi.srWindow.Top;
1801 rcClip.Right = rcSrc.Right;
1802 rcClip.Bottom = rcSrc.Bottom ;
1803
1804 /* Move the source text to the top of the screen. */
1805 new_org.X = rcSrc.Left;
1806 new_org.Y = rcClip.Top;
1807
1808 /* Fill the right character and attributes. */
1809 fillchar.Char.AsciiChar = ' ';
1810 fillchar.Attributes = MAKEATTR(nm_fg_color, nm_bg_color);
1811
1812 /* Scroll the window. */
1813 SetConsoleTextAttribute(con_out, fillchar.Attributes);
1814 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
1815
1816 /* Clear remaining lines at bottom. */
1817 topleft.X = csbi.dwCursorPosition.X;
1818 topleft.Y = rcSrc.Bottom - n;
1819 size = (n * csbi.dwSize.X) + (rcSrc.Right - topleft.X);
1820 FillConsoleOutputCharacter(con_out, ' ', size, topleft,
1821 &nchars);
1822 FillConsoleOutputAttribute(con_out, fillchar.Attributes, size, topleft,
1823 &nchars);
1824 SetConsoleTextAttribute(con_out, curr_attr);
1825
1826 /* Move cursor n lines up from where it was. */
1827 csbi.dwCursorPosition.Y -= n;
1828 SetConsoleCursorPosition(con_out, csbi.dwCursorPosition);
1829 }
1830 #endif
1831
1832 /*
1833 * Move cursor to lower left corner of screen.
1834 */
1835 public void
1836 lower_left()
1837 {
1838 #if !MSDOS_COMPILER
1839 tputs(sc_lower_left, 1, putchr);
1840 #else
1841 flush();
1842 _settextposition(sc_height, 1);
1843 #endif
1844 }
1845
1846 /*
1847 * Move cursor to left position of current line.
1848 */
1849 public void
1850 line_left()
1851 {
1852 #if !MSDOS_COMPILER
1853 tputs(sc_return, 1, putchr);
1854 #else
1855 int row;
1856 flush();
1857 #if MSDOS_COMPILER==WIN32C
1858 {
1859 CONSOLE_SCREEN_BUFFER_INFO scr;
1860 GetConsoleScreenBufferInfo(con_out, &scr);
1861 row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1;
1862 }
1863 #else
1864 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1865 row = wherey();
1866 #else
1867 {
1868 struct rccoord tpos = _gettextposition();
1869 row = tpos.row;
1870 }
1871 #endif
1872 #endif
1873 _settextposition(row, 1);
1874 #endif
1875 }
1876
1877 /*
1878 * Check if the console size has changed and reset internals
1879 * (in lieu of SIGWINCH for WIN32).
1880 */
1881 public void
1882 check_winch()
1883 {
1884 #if MSDOS_COMPILER==WIN32C
1885 CONSOLE_SCREEN_BUFFER_INFO scr;
1886 COORD size;
1887
1888 if (con_out == INVALID_HANDLE_VALUE)
1889 return;
1890
1891 flush();
1892 GetConsoleScreenBufferInfo(con_out, &scr);
1893 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1;
1894 size.X = scr.srWindow.Right - scr.srWindow.Left + 1;
1895 if (size.Y != sc_height || size.X != sc_width)
1896 {
1897 sc_height = size.Y;
1898 sc_width = size.X;
1899 if (!no_init && con_out_ours == con_out)
1900 SetConsoleScreenBufferSize(con_out, size);
1901 pos_init();
1902 wscroll = (sc_height + 1) / 2;
1903 screen_trashed = 1;
1904 }
1905 #endif
1906 }
1907
1908 /*
1909 * Goto a specific line on the screen.
1910 */
1911 public void
1912 goto_line(slinenum)
1913 int slinenum;
1914 {
1915 #if !MSDOS_COMPILER
1916 tputs(tgoto(sc_move, 0, slinenum), 1, putchr);
1917 #else
1918 flush();
1919 _settextposition(slinenum+1, 1);
1920 #endif
1921 }
1922
1923 #if MSDOS_COMPILER==MSOFTC || MSDOS_COMPILER==BORLANDC
1924 /*
1925 * Create an alternate screen which is all white.
1926 * This screen is used to create a "flash" effect, by displaying it
1927 * briefly and then switching back to the normal screen.
1928 * {{ Yuck! There must be a better way to get a visual bell. }}
1929 */
1930 static void
1931 create_flash()
1932 {
1933 #if MSDOS_COMPILER==MSOFTC
1934 struct videoconfig w;
1935 char *blanks;
1936 int row, col;
1937
1938 _getvideoconfig(&w);
1939 videopages = w.numvideopages;
1940 if (videopages < 2)
1941 {
1942 at_enter(AT_STANDOUT);
1943 at_exit();
1944 } else
1945 {
1946 _setactivepage(1);
1947 at_enter(AT_STANDOUT);
1948 blanks = (char *) ecalloc(w.numtextcols, sizeof(char));
1949 for (col = 0; col < w.numtextcols; col++)
1950 blanks[col] = ' ';
1951 for (row = w.numtextrows; row > 0; row--)
1952 _outmem(blanks, w.numtextcols);
1953 _setactivepage(0);
1954 _setvisualpage(0);
1955 free(blanks);
1956 at_exit();
1957 }
1958 #else
1959 #if MSDOS_COMPILER==BORLANDC
1960 register int n;
1961
1962 whitescreen = (unsigned short *)
1963 malloc(sc_width * sc_height * sizeof(short));
1964 if (whitescreen == NULL)
1965 return;
1966 for (n = 0; n < sc_width * sc_height; n++)
1967 whitescreen[n] = 0x7020;
1968 #else
1969 #if MSDOS_COMPILER==WIN32C
1970 register int n;
1971
1972 whitescreen = (WORD *)
1973 malloc(sc_height * sc_width * sizeof(WORD));
1974 if (whitescreen == NULL)
1975 return;
1976 /* Invert the standard colors. */
1977 for (n = 0; n < sc_width * sc_height; n++)
1978 whitescreen[n] = (WORD)((nm_fg_color << 4) | nm_bg_color);
1979 #endif
1980 #endif
1981 #endif
1982 flash_created = 1;
1983 }
1984 #endif /* MSDOS_COMPILER */
1985
1986 /*
1987 * Output the "visual bell", if there is one.
1988 */
1989 public void
1990 vbell()
1991 {
1992 #if !MSDOS_COMPILER
1993 if (*sc_visual_bell == '\0')
1994 return;
1995 tputs(sc_visual_bell, sc_height, putchr);
1996 #else
1997 #if MSDOS_COMPILER==DJGPPC
1998 ScreenVisualBell();
1999 #else
2000 #if MSDOS_COMPILER==MSOFTC
2001 /*
2002 * Create a flash screen on the second video page.
2003 * Switch to that page, then switch back.
2004 */
2005 if (!flash_created)
2006 create_flash();
2007 if (videopages < 2)
2008 return;
2009 _setvisualpage(1);
2010 delay(100);
2011 _setvisualpage(0);
2012 #else
2013 #if MSDOS_COMPILER==BORLANDC
2014 unsigned short *currscreen;
2015
2016 /*
2017 * Get a copy of the current screen.
2018 * Display the flash screen.
2019 * Then restore the old screen.
2020 */
2021 if (!flash_created)
2022 create_flash();
2023 if (whitescreen == NULL)
2024 return;
2025 currscreen = (unsigned short *)
2026 malloc(sc_width * sc_height * sizeof(short));
2027 if (currscreen == NULL) return;
2028 gettext(1, 1, sc_width, sc_height, currscreen);
2029 puttext(1, 1, sc_width, sc_height, whitescreen);
2030 delay(100);
2031 puttext(1, 1, sc_width, sc_height, currscreen);
2032 free(currscreen);
2033 #else
2034 #if MSDOS_COMPILER==WIN32C
2035 /* paint screen with an inverse color */
2036 clear();
2037
2038 /* leave it displayed for 100 msec. */
2039 Sleep(100);
2040
2041 /* restore with a redraw */
2042 repaint();
2043 #endif
2044 #endif
2045 #endif
2046 #endif
2047 #endif
2048 }
2049
2050 /*
2051 * Make a noise.
2052 */
2053 static void
2054 beep()
2055 {
2056 #if !MSDOS_COMPILER
2057 putchr(CONTROL('G'));
2058 #else
2059 #if MSDOS_COMPILER==WIN32C
2060 MessageBeep(0);
2061 #else
2062 write(1, "\7", 1);
2063 #endif
2064 #endif
2065 }
2066
2067 /*
2068 * Ring the terminal bell.
2069 */
2070 public void
2071 bell()
2072 {
2073 if (quiet == VERY_QUIET)
2074 vbell();
2075 else
2076 beep();
2077 }
2078
2079 /*
2080 * Clear the screen.
2081 */
2082 public void
2083 clear()
2084 {
2085 #if !MSDOS_COMPILER
2086 tputs(sc_clear, sc_height, putchr);
2087 #else
2088 flush();
2089 #if MSDOS_COMPILER==WIN32C
2090 win32_clear();
2091 #else
2092 _clearscreen(_GCLEARSCREEN);
2093 #endif
2094 #endif
2095 }
2096
2097 /*
2098 * Clear from the cursor to the end of the cursor's line.
2099 * {{ This must not move the cursor. }}
2100 */
2101 public void
2102 clear_eol()
2103 {
2104 #if !MSDOS_COMPILER
2105 tputs(sc_eol_clear, 1, putchr);
2106 #else
2107 #if MSDOS_COMPILER==MSOFTC
2108 short top, left;
2109 short bot, right;
2110 struct rccoord tpos;
2111
2112 flush();
2113 /*
2114 * Save current state.
2115 */
2116 tpos = _gettextposition();
2117 _gettextwindow(&top, &left, &bot, &right);
2118 /*
2119 * Set a temporary window to the current line,
2120 * from the cursor's position to the right edge of the screen.
2121 * Then clear that window.
2122 */
2123 _settextwindow(tpos.row, tpos.col, tpos.row, sc_width);
2124 _clearscreen(_GWINDOW);
2125 /*
2126 * Restore state.
2127 */
2128 _settextwindow(top, left, bot, right);
2129 _settextposition(tpos.row, tpos.col);
2130 #else
2131 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
2132 flush();
2133 clreol();
2134 #else
2135 #if MSDOS_COMPILER==WIN32C
2136 DWORD nchars;
2137 COORD cpos;
2138 CONSOLE_SCREEN_BUFFER_INFO scr;
2139
2140 flush();
2141 memset(&scr, 0, sizeof(scr));
2142 GetConsoleScreenBufferInfo(con_out, &scr);
2143 cpos.X = scr.dwCursorPosition.X;
2144 cpos.Y = scr.dwCursorPosition.Y;
2145 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
2146 FillConsoleOutputAttribute(con_out, curr_attr,
2147 scr.dwSize.X - cpos.X, cpos, &nchars);
2148 FillConsoleOutputCharacter(con_out, ' ',
2149 scr.dwSize.X - cpos.X, cpos, &nchars);
2150 #endif
2151 #endif
2152 #endif
2153 #endif
2154 }
2155
2156 /*
2157 * Clear the current line.
2158 * Clear the screen if there's off-screen memory below the display.
2159 */
2160 static void
2161 clear_eol_bot()
2162 {
2163 #if MSDOS_COMPILER
2164 clear_eol();
2165 #else
2166 if (below_mem)
2167 tputs(sc_eos_clear, 1, putchr);
2168 else
2169 tputs(sc_eol_clear, 1, putchr);
2170 #endif
2171 }
2172
2173 /*
2174 * Clear the bottom line of the display.
2175 * Leave the cursor at the beginning of the bottom line.
2176 */
2177 public void
2178 clear_bot()
2179 {
2180 /*
2181 * If we're in a non-normal attribute mode, temporarily exit
2182 * the mode while we do the clear. Some terminals fill the
2183 * cleared area with the current attribute.
2184 */
2185 if (oldbot)
2186 lower_left();
2187 else
2188 line_left();
2189
2190 if (attrmode == AT_NORMAL)
2191 clear_eol_bot();
2192 else
2193 {
2194 int saved_attrmode = attrmode;
2195
2196 at_exit();
2197 clear_eol_bot();
2198 at_enter(saved_attrmode);
2199 }
2200 }
2201
2202 public void
2203 at_enter(attr)
2204 int attr;
2205 {
2206 attr = apply_at_specials(attr);
2207
2208 #if !MSDOS_COMPILER
2209 /* The one with the most priority is last. */
2210 if (attr & AT_UNDERLINE)
2211 tputs(sc_u_in, 1, putchr);
2212 if (attr & AT_BOLD)
2213 tputs(sc_b_in, 1, putchr);
2214 if (attr & AT_BLINK)
2215 tputs(sc_bl_in, 1, putchr);
2216 if (attr & AT_STANDOUT)
2217 tputs(sc_s_in, 1, putchr);
2218 #else
2219 flush();
2220 /* The one with the most priority is first. */
2221 if (attr & AT_STANDOUT)
2222 {
2223 SETCOLORS(so_fg_color, so_bg_color);
2224 } else if (attr & AT_BLINK)
2225 {
2226 SETCOLORS(bl_fg_color, bl_bg_color);
2227 }
2228 else if (attr & AT_BOLD)
2229 {
2230 SETCOLORS(bo_fg_color, bo_bg_color);
2231 }
2232 else if (attr & AT_UNDERLINE)
2233 {
2234 SETCOLORS(ul_fg_color, ul_bg_color);
2235 }
2236 #endif
2237
2238 attrmode = attr;
2239 }
2240
2241 public void
2242 at_exit()
2243 {
2244 #if !MSDOS_COMPILER
2245 /* Undo things in the reverse order we did them. */
2246 if (attrmode & AT_STANDOUT)
2247 tputs(sc_s_out, 1, putchr);
2248 if (attrmode & AT_BLINK)
2249 tputs(sc_bl_out, 1, putchr);
2250 if (attrmode & AT_BOLD)
2251 tputs(sc_b_out, 1, putchr);
2252 if (attrmode & AT_UNDERLINE)
2253 tputs(sc_u_out, 1, putchr);
2254 #else
2255 flush();
2256 SETCOLORS(nm_fg_color, nm_bg_color);
2257 #endif
2258
2259 attrmode = AT_NORMAL;
2260 }
2261
2262 public void
2263 at_switch(attr)
2264 int attr;
2265 {
2266 int new_attrmode = apply_at_specials(attr);
2267 int ignore_modes = AT_ANSI;
2268
2269 if ((new_attrmode & ~ignore_modes) != (attrmode & ~ignore_modes))
2270 {
2271 at_exit();
2272 at_enter(attr);
2273 }
2274 }
2275
2276 public int
2277 is_at_equiv(attr1, attr2)
2278 int attr1;
2279 int attr2;
2280 {
2281 attr1 = apply_at_specials(attr1);
2282 attr2 = apply_at_specials(attr2);
2283
2284 return (attr1 == attr2);
2285 }
2286
2287 public int
2288 apply_at_specials(attr)
2289 int attr;
2290 {
2291 if (attr & AT_BINARY)
2292 attr |= binattr;
2293 if (attr & AT_HILITE)
2294 attr |= AT_STANDOUT;
2295 attr &= ~(AT_BINARY|AT_HILITE);
2296
2297 return attr;
2298 }
2299
2300 #if 0 /* No longer used */
2301 /*
2302 * Erase the character to the left of the cursor
2303 * and move the cursor left.
2304 */
2305 public void
2306 backspace()
2307 {
2308 #if !MSDOS_COMPILER
2309 /*
2310 * Erase the previous character by overstriking with a space.
2311 */
2312 tputs(sc_backspace, 1, putchr);
2313 putchr(' ');
2314 tputs(sc_backspace, 1, putchr);
2315 #else
2316 #if MSDOS_COMPILER==MSOFTC
2317 struct rccoord tpos;
2318
2319 flush();
2320 tpos = _gettextposition();
2321 if (tpos.col <= 1)
2322 return;
2323 _settextposition(tpos.row, tpos.col-1);
2324 _outtext(" ");
2325 _settextposition(tpos.row, tpos.col-1);
2326 #else
2327 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
2328 cputs("\b");
2329 #else
2330 #if MSDOS_COMPILER==WIN32C
2331 COORD cpos;
2332 DWORD cChars;
2333 CONSOLE_SCREEN_BUFFER_INFO scr;
2334
2335 flush();
2336 GetConsoleScreenBufferInfo(con_out, &scr);
2337 cpos = scr.dwCursorPosition;
2338 if (cpos.X <= 0)
2339 return;
2340 cpos.X--;
2341 SetConsoleCursorPosition(con_out, cpos);
2342 FillConsoleOutputCharacter(con_out, (TCHAR)' ', 1, cpos, &cChars);
2343 SetConsoleCursorPosition(con_out, cpos);
2344 #endif
2345 #endif
2346 #endif
2347 #endif
2348 }
2349 #endif /* 0 */
2350
2351 /*
2352 * Output a plain backspace, without erasing the previous char.
2353 */
2354 public void
2355 putbs()
2356 {
2357 #if !MSDOS_COMPILER
2358 tputs(sc_backspace, 1, putchr);
2359 #else
2360 int row, col;
2361
2362 flush();
2363 {
2364 #if MSDOS_COMPILER==MSOFTC
2365 struct rccoord tpos;
2366 tpos = _gettextposition();
2367 row = tpos.row;
2368 col = tpos.col;
2369 #else
2370 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
2371 row = wherey();
2372 col = wherex();
2373 #else
2374 #if MSDOS_COMPILER==WIN32C
2375 CONSOLE_SCREEN_BUFFER_INFO scr;
2376 GetConsoleScreenBufferInfo(con_out, &scr);
2377 row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1;
2378 col = scr.dwCursorPosition.X - scr.srWindow.Left + 1;
2379 #endif
2380 #endif
2381 #endif
2382 }
2383 if (col <= 1)
2384 return;
2385 _settextposition(row, col-1);
2386 #endif /* MSDOS_COMPILER */
2387 }
2388
2389 #if MSDOS_COMPILER==WIN32C
2390 /*
2391 * Determine whether an input character is waiting to be read.
2392 */
2393 static int
2394 win32_kbhit(tty)
2395 HANDLE tty;
2396 {
2397 INPUT_RECORD ip;
2398 DWORD read;
2399
2400 if (keyCount > 0)
2401 return (TRUE);
2402
2403 currentKey.ascii = 0;
2404 currentKey.scan = 0;
2405
2406 /*
2407 * Wait for a real key-down event, but
2408 * ignore SHIFT and CONTROL key events.
2409 */
2410 do
2411 {
2412 PeekConsoleInput(tty, &ip, 1, &read);
2413 if (read == 0)
2414 return (FALSE);
2415 ReadConsoleInput(tty, &ip, 1, &read);
2416 } while (ip.EventType != KEY_EVENT ||
2417 ip.Event.KeyEvent.bKeyDown != TRUE ||
2418 ip.Event.KeyEvent.wVirtualScanCode == 0 ||
2419 ip.Event.KeyEvent.wVirtualKeyCode == VK_SHIFT ||
2420 ip.Event.KeyEvent.wVirtualKeyCode == VK_CONTROL ||
2421 ip.Event.KeyEvent.wVirtualKeyCode == VK_MENU);
2422
2423 currentKey.ascii = ip.Event.KeyEvent.uChar.AsciiChar;
2424 currentKey.scan = ip.Event.KeyEvent.wVirtualScanCode;
2425 keyCount = ip.Event.KeyEvent.wRepeatCount;
2426
2427 if (ip.Event.KeyEvent.dwControlKeyState &
2428 (LEFT_ALT_PRESSED | RIGHT_ALT_PRESSED))
2429 {
2430 switch (currentKey.scan)
2431 {
2432 case PCK_ALT_E: /* letter 'E' */
2433 currentKey.ascii = 0;
2434 break;
2435 }
2436 } else if (ip.Event.KeyEvent.dwControlKeyState &
2437 (LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED))
2438 {
2439 switch (currentKey.scan)
2440 {
2441 case PCK_RIGHT: /* right arrow */
2442 currentKey.scan = PCK_CTL_RIGHT;
2443 break;
2444 case PCK_LEFT: /* left arrow */
2445 currentKey.scan = PCK_CTL_LEFT;
2446 break;
2447 case PCK_DELETE: /* delete */
2448 currentKey.scan = PCK_CTL_DELETE;
2449 break;
2450 }
2451 }
2452 return (TRUE);
2453 }
2454
2455 /*
2456 * Read a character from the keyboard.
2457 */
2458 public char
2459 WIN32getch(tty)
2460 int tty;
2461 {
2462 int ascii;
2463
2464 if (pending_scancode)
2465 {
2466 pending_scancode = 0;
2467 return ((char)(currentKey.scan & 0x00FF));
2468 }
2469
2470 while (win32_kbhit((HANDLE)tty) == FALSE)
2471 {
2472 Sleep(20);
2473 if (ABORT_SIGS())
2474 return ('\003');
2475 continue;
2476 }
2477 keyCount --;
2478 ascii = currentKey.ascii;
2479 /*
2480 * On PC's, the extended keys return a 2 byte sequence beginning
2481 * with '00', so if the ascii code is 00, the next byte will be
2482 * the lsb of the scan code.
2483 */
2484 pending_scancode = (ascii == 0x00);
2485 return ((char)ascii);
2486 }
2487 #endif
2488
2489 #if MSDOS_COMPILER
2490 /*
2491 */
2492 public void
2493 WIN32setcolors(fg, bg)
2494 int fg;
2495 int bg;
2496 {
2497 SETCOLORS(fg, bg);
2498 }
2499
2500 /*
2501 */
2502 public void
2503 WIN32textout(text, len)
2504 char *text;
2505 int len;
2506 {
2507 #if MSDOS_COMPILER==WIN32C
2508 DWORD written;
2509 WriteConsole(con_out, text, len, &written, NULL);
2510 #else
2511 char c = text[len];
2512 text[len] = '\0';
2513 cputs(text);
2514 text[len] = c;
2515 #endif
2516 }
2517 #endif
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