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Replace frexp(3) with MI code and add a frexpl(3) function to libm.
[dragonfly.git] / contrib / less-4 / screen.c
blob39e3f17617fdc8a630d8fcddd39e5e5002bff875
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>
29 extern 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"
90 static char *windowid;
91 #else
92 #define DEFAULT_TERM "unknown"
93 #endif
94
95 #if MSDOS_COMPILER==MSOFTC
96 static int videopages;
97 static long msec_loops;
98 static int flash_created = 0;
99 #define SETCOLORS(fg,bg) { _settextcolor(fg); _setbkcolor(bg); }
100 #endif
101
102 #if MSDOS_COMPILER==BORLANDC
103 static unsigned short *whitescreen;
104 static 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); }
111 extern int sc_height;
112 #endif
113
114 #if MSDOS_COMPILER==WIN32C
115 struct keyRecord
116 {
117 int ascii;
118 int scan;
119 } currentKey;
120
121 static int keyCount = 0;
122 static WORD curr_attr;
123 static int pending_scancode = 0;
124 static WORD *whitescreen;
125
126 static HANDLE con_out_save = INVALID_HANDLE_VALUE; /* previous console */
127 static HANDLE con_out_ours = INVALID_HANDLE_VALUE; /* our own */
128 HANDLE con_out = INVALID_HANDLE_VALUE; /* current console */
129
130 extern int quitting;
131 static void win32_init_term();
132 static 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
143 public int nm_fg_color; /* Color of normal text */
144 public int nm_bg_color;
145 public int bo_fg_color; /* Color of bold text */
146 public int bo_bg_color;
147 public int ul_fg_color; /* Color of underlined text */
148 public int ul_bg_color;
149 public int so_fg_color; /* Color of standout text */
150 public int so_bg_color;
151 public int bl_fg_color; /* Color of blinking text */
152 public int bl_bg_color;
153 static int sy_fg_color; /* Color of system text (before less) */
154 static int sy_bg_color;
155
156 #else
157
158 /*
159 * Strings passed to tputs() to do various terminal functions.
160 */
161 static 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
187 static int init_done = 0;
188
189 public int auto_wrap; /* Terminal does \r\n when write past margin */
190 public int ignaw; /* Terminal ignores \n immediately after wrap */
191 public int erase_char; /* The user's erase char */
192 public int erase2_char; /* The user's other erase char */
193 public int kill_char; /* The user's line-kill char */
194 public int werase_char; /* The user's word-erase char */
195 public int sc_width, sc_height; /* Height & width of screen */
196 public int bo_s_width, bo_e_width; /* Printing width of boldface seq */
197 public int ul_s_width, ul_e_width; /* Printing width of underline seq */
198 public int so_s_width, so_e_width; /* Printing width of standout seq */
199 public int bl_s_width, bl_e_width; /* Printing width of blink seq */
200 public int above_mem, below_mem; /* Memory retained above/below screen */
201 public int can_goto_line; /* Can move cursor to any line */
202 public int clear_bg; /* Clear fills with background color */
203 public int missing_cap = 0; /* Some capability is missing */
204
205 static int attrmode = AT_NORMAL;
206 extern int binattr;
207
208 #if !MSDOS_COMPILER
209 static char *cheaper();
210 static 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
218 extern short ospeed; /* Terminal output baud rate */
219 extern char PC; /* Pad character */
220 #endif
221 #ifdef _OSK
222 short ospeed;
223 char PC_, *UP, *BC;
224 #endif
225
226 extern int quiet; /* If VERY_QUIET, use visual bell for bell */
227 extern int no_back_scroll;
228 extern int swindow;
229 extern int no_init;
230 extern int no_keypad;
231 extern int sigs;
232 extern int wscroll;
233 extern int screen_trashed;
234 extern int tty;
235 extern int top_scroll;
236 extern int oldbot;
237 #if HILITE_SEARCH
238 extern int hilite_search;
239 #endif
240
241 extern char *tgetstr();
242 extern 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
257 raw_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 */
619 static int hardcopy;
620
621 static char *
622 ltget_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
651 ltgetflag(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
664 ltgetnum(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 *
677 ltgetstr(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
695 scrsize()
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
825 get_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
853 dummy_func()
854 {
855 static long delay_dummy = 0;
856 delay_dummy++;
857 }
858
859 static void
860 delay(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 *
883 special_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
1056 get_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 */
1349 static int costcount;
1350
1351 /*ARGSUSED*/
1352 static int
1353 inc_costcount(c)
1354 int c;
1355 {
1356 costcount++;
1357 return (c);
1358 }
1359
1360 static int
1361 cost(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 *
1375 cheaper(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
1394 tmodes(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
1450 initcolor()
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
1483 win32_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 */
1517 static void
1518 win32_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
1534 init()
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
1569 deinit()
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
1596 home()
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
1611 add_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
1669 remove_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
1723 win32_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
1754 win32_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
1820 lower_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
1834 line_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
1866 check_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
1896 goto_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
1915 create_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
1974 vbell()
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
2038 beep()
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
2055 bell()
2056 {
2057 if (quiet == VERY_QUIET)
2058 vbell();
2059 else
2060 beep();
2061 }
2062
2063 /*
2064 * Clear the screen.
2065 */
2066 public void
2067 clear()
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
2086 clear_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
2145 clear_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
2162 clear_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
2187 at_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
2226 at_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
2247 at_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
2261 is_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
2272 apply_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
2290 backspace()
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
2339 putbs()
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
2378 win32_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
2443 WIN32getch(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
2477 WIN32setcolors(fg, bg)
2478 int fg;
2479 int bg;
2480 {
2481 SETCOLORS(fg, bg);
2482 }
2483
2484 /*
2485 */
2486 public void
2487 WIN32textout(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
DragonFly BSD