15 #define MODE_CURSOR 0x01
16 #define MODE_WRAP 0x02
17 #define MODE_ORIGIN 0x04
18 #define MODE_AUTOCR 0x08
19 #define MODE_DEFAULT (MODE_CURSOR | MODE_WRAP)
20 #define ATTR_BOLD 0x10
21 #define ATTR_ITALIC 0x20
23 #define ATTR_ALL (ATTR_BOLD | ATTR_ITALIC | ATTR_REV)
24 #define MODE_INSERT 0x100
25 #define MODE_WRAPREADY 0x200
27 #define LIMIT(n, a, b) ((n) < (a) ? (a) : ((n) > (b) ? (b) : (n)))
28 #define BIT_SET(i, b, val) ((val) ? ((i) | (b)) : ((i) & ~(b)))
29 #define OFFSET(r, c) ((r) * pad_cols() + (c))
31 static struct term
*term
;
33 static char *fgs
, *bgs
;
40 /* low level drawing and lazy updating */
42 static int dirty
[NROWS
];
45 static char fgcolor(void)
47 int c
= mode
& ATTR_REV
? bg
: fg
;
50 if (mode
& ATTR_ITALIC
)
55 static char bgcolor(void)
57 return mode
& ATTR_REV
? fg
: bg
;
60 /* assumes visible && !lazy */
61 static void _draw_pos(int r
, int c
, int cursor
)
63 int rev
= cursor
&& mode
& MODE_CURSOR
;
65 char fg
= rev
? bgs
[i
] : fgs
[i
];
66 char bg
= rev
? fgs
[i
] : bgs
[i
];
67 pad_put(screen
[i
], r
, c
, fg
, bg
);
70 /* assumes visible && !lazy */
71 static void _draw_row(int r
)
74 pad_blankrow(r
, bgcolor());
75 for (i
= 0; i
< pad_cols(); i
++) {
76 int c
= screen
[OFFSET(r
, i
)];
77 if ((c
&& c
!= ' ') || bgs
[OFFSET(r
, i
)] != bgcolor())
82 static int candraw(int sr
, int er
)
88 for (i
= sr
; i
< er
; i
++)
93 static void draw_rows(int sr
, int er
)
97 for (i
= sr
; i
< er
; i
++)
101 static void draw_cols(int r
, int sc
, int ec
)
104 if (candraw(r
, r
+ 1))
105 for (i
= sc
; i
< ec
; i
++)
109 static void draw_char(int ch
, int r
, int c
)
111 int i
= OFFSET(r
, c
);
115 if (candraw(r
, r
+ 1))
119 static void draw_cursor(int put
)
121 if (candraw(row
, row
+ 1))
122 _draw_pos(row
, col
, put
);
125 static void lazy_start(void)
127 memset(dirty
, 0, sizeof(dirty
));
131 static void lazy_flush(void)
134 if (!visible
|| !lazy
)
136 _draw_pos(row
, col
, 0);
137 for (i
= 0; i
< pad_rows(); i
++)
140 _draw_pos(row
, col
, 1);
144 static void screen_reset(int i
, int n
)
146 memset(screen
+ i
, 0, n
* sizeof(*screen
));
147 memset(fgs
+ i
, fg
, n
);
148 memset(bgs
+ i
, bg
, n
);
151 static void screen_move(int dst
, int src
, int n
)
153 memmove(screen
+ dst
, screen
+ src
, n
* sizeof(*screen
));
154 memmove(fgs
+ dst
, fgs
+ src
, n
);
155 memmove(bgs
+ dst
, bgs
+ src
, n
);
158 /* terminal input buffering */
160 #define PTYBUFSIZE (1 << 13)
162 static char ptybuf
[PTYBUFSIZE
]; /* always emptied in term_read() */
163 static int ptylen
; /* buffer length */
164 static int ptycur
; /* current offset */
166 static void waitpty(void)
168 struct pollfd ufds
[1];
169 ufds
[0].fd
= term
->fd
;
170 ufds
[0].events
= POLLIN
;
174 static int readpty(void)
177 return (unsigned char) ptybuf
[ptycur
++];
180 ptylen
= read(term
->fd
, ptybuf
, PTYBUFSIZE
);
181 if (ptylen
== -1 && errno
== EAGAIN
) {
183 ptylen
= read(term
->fd
, ptybuf
, PTYBUFSIZE
);
187 return (unsigned char) ptybuf
[0];
192 /* term interface functions */
194 void term_send(int c
)
198 write(term
->fd
, &b
, 1);
201 static void term_sendstr(char *s
)
204 write(term
->fd
, s
, strlen(s
));
207 static void term_blank(void)
209 screen_reset(0, pad_rows() * pad_cols());
211 pad_blank(bgcolor());
214 static void ctlseq(void);
218 while (ptycur
< ptylen
) {
219 if (visible
&& !lazy
&& ptylen
- ptycur
> 15)
226 static void term_reset(void)
237 static int _openpty(int *master
, int *slave
)
242 if ((*master
= open("/dev/ptmx", O_RDWR
)) == -1)
244 if (ioctl(*master
, TIOCSPTLCK
, &unlock
) == -1)
246 if (ioctl(*master
, TIOCGPTN
, &ptyno
) == -1)
248 sprintf(name
, "/dev/pts/%d", ptyno
);
249 *slave
= open(name
, O_RDWR
| O_NOCTTY
);
253 static void _login(int fd
)
256 winp
.ws_col
= pad_cols();
257 winp
.ws_row
= pad_rows();
261 ioctl(fd
, TIOCSCTTY
, NULL
);
262 ioctl(fd
, TIOCSWINSZ
, &winp
);
270 #define MAXENV (1 << 8)
272 static void envcpy(char **d
, char **s
)
279 static void execvep(char *cmd
, char **argv
, char **envp
)
282 char *p
= getenv("PATH");
283 execve(cmd
, argv
, envp
);
286 while (*p
&& *p
!= ':')
290 execve(path
, argv
, envp
);
296 extern char **environ
;
297 void term_exec(char **args
)
300 memset(term
, 0, sizeof(*term
));
301 if (_openpty(&master
, &slave
) == -1)
303 if ((term
->pid
= fork()) == -1)
306 char *envp
[MAXENV
] = {"TERM=linux"};
307 envcpy(envp
+ 1, environ
);
310 execvep(args
[0], args
, envp
);
315 fcntl(term
->fd
, F_SETFD
, fcntl(term
->fd
, F_GETFD
) | FD_CLOEXEC
);
316 fcntl(term
->fd
, F_SETFL
, fcntl(term
->fd
, F_GETFL
) | O_NONBLOCK
);
318 memset(term
->hist
, 0, sizeof(term
->hist
));
321 static void misc_save(struct term_state
*state
)
330 static void misc_load(struct term_state
*state
)
339 void term_save(struct term
*term
)
342 misc_save(&term
->cur
);
347 void term_redraw(void)
351 memset(dirty
, 1, sizeof(dirty
));
358 void term_load(struct term
*t
, int flags
)
361 misc_load(&term
->cur
);
362 screen
= term
->screen
;
374 memset(term
, 0, sizeof(*term
));
375 term_load(term
, visible
);
380 static int writeutf8(char *dst
, int c
)
385 *d
++ = 0xf0 | (c
>> 18);
387 } else if (c
> 0x7ff) {
388 *d
++ = 0xe0 | (c
>> 12);
390 } else if (c
> 0x7f) {
391 *d
++ = 0xc0 | (c
>> 6);
394 *d
++ = c
> 0 ? c
: ' ';
398 *d
++ = 0x80 | ((c
>> (l
* 6)) & 0x3f);
402 void term_screenshot(void)
405 int fd
= open(SCRSHOT
, O_CREAT
| O_TRUNC
| O_WRONLY
, 0600);
407 for (i
= 0; i
< pad_rows(); i
++) {
409 for (j
= 0; j
< pad_cols(); j
++)
410 if (~screen
[OFFSET(i
, j
)] & DWCHAR
)
411 s
+= writeutf8(s
, screen
[OFFSET(i
, j
)]);
413 write(fd
, buf
, s
- buf
);
418 /* high-level drawing functions */
420 static void empty_rows(int sr
, int er
)
422 screen_reset(OFFSET(sr
, 0), (er
- sr
) * pad_cols());
425 static void blank_rows(int sr
, int er
)
432 #define HISTROW(pos) (term->hist + ((term->histtail + NHIST - (pos)) % NHIST) * pad_cols())
434 static void scrl_rows(int nr
)
437 for (i
= 0; i
< nr
; i
++) {
438 memcpy(HISTROW(0), screen
+ i
* pad_cols(),
439 pad_cols() * sizeof(screen
[0]));
440 term
->histtail
= (term
->histtail
+ 1) % NHIST
;
444 void term_hist(int scrl
)
452 memset(dirty
, 1, sizeof(dirty
));
453 for (i
= 0; i
< pad_rows(); i
++) {
454 int off
= (i
- scrl
) * pad_cols();
455 int *_scr
= i
< scrl
? HISTROW(scrl
- i
) : term
->screen
+ off
;
456 char *_fgs
= i
< scrl
? NULL
: term
->fgs
+ off
;
457 char *_bgs
= i
< scrl
? NULL
: term
->bgs
+ off
;
458 for (j
= 0; j
< pad_cols(); j
++)
459 pad_put(_scr
[j
], i
, j
, _fgs
? _fgs
[j
] : BGCOLOR
,
460 _bgs
? _bgs
[j
] : FGCOLOR
);
464 static void scroll_screen(int sr
, int nr
, int n
)
469 screen_move(OFFSET(sr
+ n
, 0), OFFSET(sr
, 0), nr
* pad_cols());
471 empty_rows(sr
, sr
+ n
);
473 empty_rows(sr
+ nr
+ n
, sr
+ nr
);
474 draw_rows(MIN(sr
, sr
+ n
), MAX(sr
+ nr
, sr
+ nr
+ n
));
478 static void insert_lines(int n
)
480 int sr
= MAX(top
, row
);
481 int nr
= bot
- row
- n
;
483 scroll_screen(sr
, nr
, n
);
486 static void delete_lines(int n
)
488 int r
= MAX(top
, row
);
490 int nr
= bot
- r
- n
;
492 scroll_screen(sr
, nr
, -n
);
495 static int origin(void)
497 return mode
& MODE_ORIGIN
;
500 static void move_cursor(int r
, int c
)
504 t
= origin() ? top
: 0;
505 b
= origin() ? bot
: pad_rows();
506 row
= LIMIT(r
, t
, b
- 1);
507 col
= LIMIT(c
, 0, pad_cols() - 1);
509 mode
= BIT_SET(mode
, MODE_WRAPREADY
, 0);
512 static void set_region(int t
, int b
)
514 top
= LIMIT(t
- 1, 0, pad_rows() - 1);
515 bot
= LIMIT(b
? b
: pad_rows(), top
+ 1, pad_rows());
520 static void setattr(int m
)
541 mode
&= ~ATTR_ITALIC
;
548 fg
= m
> 37 ? FGCOLOR
: m
- 30;
550 bg
= m
> 47 ? BGCOLOR
: m
- 40;
554 static void kill_chars(int sc
, int ec
)
557 for (i
= sc
; i
< ec
; i
++)
558 draw_char(0, row
, i
);
562 static void move_chars(int sc
, int nc
, int n
)
565 screen_move(OFFSET(row
, sc
+ n
), OFFSET(row
, sc
), nc
);
567 screen_reset(OFFSET(row
, sc
), n
);
569 screen_reset(OFFSET(row
, pad_cols() + n
), -n
);
570 draw_cols(row
, MIN(sc
, sc
+ n
), pad_cols());
574 static void delete_chars(int n
)
577 int nc
= pad_cols() - sc
;
578 move_chars(sc
, nc
, -n
);
581 static void insert_chars(int n
)
583 int nc
= pad_cols() - col
- n
;
584 move_chars(col
, nc
, n
);
587 static void advance(int dr
, int dc
, int scrl
)
591 if (dr
&& r
>= bot
&& scrl
) {
593 int nr
= (bot
- top
) + n
;
594 scroll_screen(top
+ -n
, nr
, n
);
596 if (dr
&& r
< top
&& scrl
) {
598 int nr
= (bot
- top
) - n
;
599 scroll_screen(top
, nr
, n
);
601 r
= dr
? LIMIT(r
, top
, bot
- 1) : r
;
602 c
= LIMIT(c
, 0, pad_cols() - 1);
606 static void insertchar(int c
)
608 if (mode
& MODE_WRAPREADY
)
610 if (mode
& MODE_INSERT
)
612 draw_char(c
, row
, col
);
613 if (col
== pad_cols() - 1)
614 mode
= BIT_SET(mode
, MODE_WRAPREADY
, 1);
620 /* partial vt102 implementation */
622 static void escseq(void);
623 static void escseq_cs(void);
624 static void escseq_g0(void);
625 static void escseq_g1(void);
626 static void escseq_g2(void);
627 static void escseq_g3(void);
628 static void csiseq(void);
629 static void csiseq_da(int c
);
630 static void csiseq_dsr(int c
);
631 static void modeseq(int c
, int set
);
633 /* comments taken from: http://www.ivarch.com/programs/termvt102.shtml */
635 static int readutf8(int c
)
641 while (l
< 6 && c
& (0x40 >> l
))
643 result
= (0x3f >> l
) & c
;
645 result
= (result
<< 6) | (readpty() & 0x3f);
649 #define unknown(ctl, c)
651 /* control sequences */
652 static void ctlseq(void)
656 case 0x09: /* HT horizontal tab to next tab stop */
657 advance(0, 8 - col
% 8, 0);
659 case 0x0a: /* LF line feed */
660 case 0x0b: /* VT line feed */
661 case 0x0c: /* FF line feed */
662 advance(1, (mode
& MODE_AUTOCR
) ? -col
: 0, 1);
664 case 0x08: /* BS backspace one column */
667 case 0x1b: /* ESC start escape sequence */
670 case 0x0d: /* CR carriage return */
673 case 0x00: /* NUL ignored */
674 case 0x07: /* BEL beep */
675 case 0x7f: /* DEL ignored */
677 case 0x05: /* ENQ trigger answerback message */
678 case 0x0e: /* SO activate G1 character set & newline */
679 case 0x0f: /* SI activate G0 character set */
680 case 0x11: /* XON resume transmission */
681 case 0x13: /* XOFF stop transmission, ignore characters */
682 case 0x18: /* CAN interrupt escape sequence */
683 case 0x1a: /* SUB interrupt escape sequence */
684 case 0x9b: /* CSI equivalent to ESC [ */
685 unknown("ctlseq", c
);
689 if (isdw(c
) && col
+ 1 == pad_cols() && ~mode
& MODE_WRAPREADY
)
694 insertchar(c
| DWCHAR
);
699 #define ESCM(c) (((c) & 0xf0) == 0x20)
700 #define ESCF(c) ((c) > 0x30 && (c) < 0x7f)
702 /* escape sequences */
703 static void escseq(void)
709 case '[': /* CSI control sequence introducer */
712 case '%': /* CS... escseq_cs table */
715 case '(': /* G0... escseq_g0 table */
718 case ')': /* G1... escseq_g1 table */
721 case '*': /* G2... escseq_g2 table */
724 case '+': /* G3... escseq_g3 table */
727 case '7': /* DECSC save state (position, charset, attributes) */
728 misc_save(&term
->sav
);
730 case '8': /* DECRC restore most recently saved state */
731 misc_load(&term
->sav
);
733 case 'M': /* RI reverse line feed */
736 case 'D': /* IND line feed */
739 case 'E': /* NEL newline */
742 case 'c': /* RIS reset */
745 case 'H': /* HTS set tab stop at current column */
746 case 'Z': /* DECID DEC private ID; return ESC [ ? 6 c (VT102) */
747 case '#': /* DECALN ("#8") DEC alignment test - fill screen with E's */
748 case '>': /* DECPNM set numeric keypad mode */
749 case '=': /* DECPAM set application keypad mode */
750 case 'N': /* SS2 select G2 charset for next char only */
751 case 'O': /* SS3 select G3 charset for next char only */
752 case 'P': /* DCS device control string (ended by ST) */
753 case 'X': /* SOS start of string */
754 case '^': /* PM privacy message (ended by ST) */
755 case '_': /* APC application program command (ended by ST) */
756 case '\\': /* ST string terminator */
757 case 'n': /* LS2 invoke G2 charset */
758 case 'o': /* LS3 invoke G3 charset */
759 case '|': /* LS3R invoke G3 charset as GR */
760 case '}': /* LS2R invoke G2 charset as GR */
761 case '~': /* LS1R invoke G1 charset as GR */
762 case ']': /* OSC operating system command */
763 case 'g': /* BEL alternate BEL */
765 unknown("escseq", c
);
770 static void escseq_cs(void)
774 case '@': /* CSDFL select default charset (ISO646/8859-1) */
775 case 'G': /* CSUTF8 select UTF-8 */
776 case '8': /* CSUTF8 select UTF-8 (obsolete) */
778 unknown("escseq_cs", c
);
783 static void escseq_g0(void)
787 case '8': /* G0DFL G0 charset = default mapping (ISO8859-1) */
788 case '0': /* G0GFX G0 charset = VT100 graphics mapping */
789 case 'U': /* G0ROM G0 charset = null mapping (straight to ROM) */
790 case 'K': /* G0USR G0 charset = user defined mapping */
791 case 'B': /* G0TXT G0 charset = ASCII mapping */
793 unknown("escseq_g0", c
);
798 static void escseq_g1(void)
802 case '8': /* G1DFL G1 charset = default mapping (ISO8859-1) */
803 case '0': /* G1GFX G1 charset = VT100 graphics mapping */
804 case 'U': /* G1ROM G1 charset = null mapping (straight to ROM) */
805 case 'K': /* G1USR G1 charset = user defined mapping */
806 case 'B': /* G1TXT G1 charset = ASCII mapping */
808 unknown("escseq_g1", c
);
813 static void escseq_g2(void)
817 case '8': /* G2DFL G2 charset = default mapping (ISO8859-1) */
818 case '0': /* G2GFX G2 charset = VT100 graphics mapping */
819 case 'U': /* G2ROM G2 charset = null mapping (straight to ROM) */
820 case 'K': /* G2USR G2 charset = user defined mapping */
822 unknown("escseq_g2", c
);
827 static void escseq_g3(void)
831 case '8': /* G3DFL G3 charset = default mapping (ISO8859-1) */
832 case '0': /* G3GFX G3 charset = VT100 graphics mapping */
833 case 'U': /* G3ROM G3 charset = null mapping (straight to ROM) */
834 case 'K': /* G3USR G3 charset = user defined mapping */
836 unknown("escseq_g3", c
);
841 static int absrow(int r
)
843 return origin() ? top
+ r
: r
;
846 #define CSIP(c) (((c) & 0xf0) == 0x30)
847 #define CSII(c) (((c) & 0xf0) == 0x20)
848 #define CSIF(c) ((c) >= 0x40 && (c) < 0x80)
850 #define MAXCSIARGS 32
851 /* ECMA-48 CSI sequences */
852 static void csiseq(void)
854 int args
[MAXCSIARGS
] = {0};
860 if (strchr("<=>?", c
)) {
867 arg
= arg
* 10 + (c
- '0');
878 case 'H': /* CUP move cursor to row, column */
879 case 'f': /* HVP move cursor to row, column */
880 move_cursor(absrow(MAX(0, args
[0] - 1)), MAX(0, args
[1] - 1));
882 case 'J': /* ED erase display */
885 kill_chars(col
, pad_cols());
886 blank_rows(row
+ 1, pad_rows());
889 kill_chars(0, col
+ 1);
890 blank_rows(0, row
- 1);
897 case 'A': /* CUU move cursor up */
898 advance(-MAX(1, args
[0]), 0, 0);
900 case 'e': /* VPR move cursor down */
901 case 'B': /* CUD move cursor down */
902 advance(MAX(1, args
[0]), 0, 0);
904 case 'a': /* HPR move cursor right */
905 case 'C': /* CUF move cursor right */
906 advance(0, MAX(1, args
[0]), 0);
908 case 'D': /* CUB move cursor left */
909 advance(0, -MAX(1, args
[0]), 0);
911 case 'K': /* EL erase line */
914 kill_chars(col
, pad_cols());
917 kill_chars(0, col
+ 1);
920 kill_chars(0, pad_cols());
924 case 'L': /* IL insert blank lines */
925 if (row
>= top
&& row
< bot
)
926 insert_lines(MAX(1, args
[0]));
928 case 'M': /* DL delete lines */
929 if (row
>= top
&& row
< bot
)
930 delete_lines(MAX(1, args
[0]));
932 case 'd': /* VPA move to row (current column) */
933 move_cursor(absrow(MAX(1, args
[0]) - 1), col
);
935 case 'm': /* SGR set graphic rendition */
938 for (i
= 0; i
< n
; i
++)
941 case 'r': /* DECSTBM set scrolling region to (top, bottom) rows */
942 set_region(args
[0], args
[1]);
944 case 'c': /* DA return ESC [ ? 6 c (VT102) */
945 csiseq_da(priv
== '?' ? args
[0] | 0x80 : args
[0]);
947 case 'h': /* SM set mode */
948 for (i
= 0; i
< n
; i
++)
949 modeseq(priv
== '?' ? args
[i
] | 0x80 : args
[i
], 1);
951 case 'l': /* RM reset mode */
952 for (i
= 0; i
< n
; i
++)
953 modeseq(priv
== '?' ? args
[i
] | 0x80 : args
[i
], 0);
955 case 'P': /* DCH delete characters on current line */
956 delete_chars(LIMIT(args
[0], 1, pad_cols() - col
));
958 case '@': /* ICH insert blank characters */
959 insert_chars(LIMIT(args
[0], 1, pad_cols() - col
));
961 case 'n': /* DSR device status report */
964 case 'G': /* CHA move cursor to column in current row */
965 advance(0, MAX(0, args
[0] - 1) - col
, 0);
967 case 'X': /* ECH erase characters on current line */
968 kill_chars(col
, MIN(col
+ MAX(1, args
[0]), pad_cols()));
970 case '[': /* IGN ignored control sequence */
971 case 'E': /* CNL move cursor down and to column 1 */
972 case 'F': /* CPL move cursor up and to column 1 */
973 case 'g': /* TBC clear tab stop (CSI 3 g = clear all stops) */
974 case 'q': /* DECLL set keyboard LEDs */
975 case 's': /* CUPSV save cursor position */
976 case 'u': /* CUPRS restore cursor position */
977 case '`': /* HPA move cursor to column in current row */
979 unknown("csiseq", c
);
984 static void csiseq_da(int c
)
988 term_sendstr("\x1b[?6c");
991 /* we don't care much about cursor shape */
992 /* printf("csiseq_da <0x%x>\n", c); */
997 static void csiseq_dsr(int c
)
1002 term_sendstr("\x1b[0n");
1005 sprintf(status
, "\x1b[%d;%dR",
1006 (origin() ? row
- top
: row
) + 1, col
+ 1);
1007 term_sendstr(status
);
1010 unknown("csiseq_dsr", c
);
1015 /* ANSI/DEC specified modes for SM/RM ANSI Specified Modes */
1016 static void modeseq(int c
, int set
)
1019 case 0x87: /* DECAWM Auto Wrap */
1020 mode
= BIT_SET(mode
, MODE_WRAP
, set
);
1022 case 0x99: /* DECTCEM Cursor on (set); Cursor off (reset) */
1023 mode
= BIT_SET(mode
, MODE_CURSOR
, set
);
1025 case 0x86: /* DECOM Sets relative coordinates (set); Sets absolute coordinates (reset) */
1026 mode
= BIT_SET(mode
, MODE_ORIGIN
, set
);
1028 case 0x14: /* LNM Line Feed / New Line Mode */
1029 mode
= BIT_SET(mode
, MODE_AUTOCR
, set
);
1031 case 0x04: /* IRM insertion/replacement mode (always reset) */
1032 mode
= BIT_SET(mode
, MODE_INSERT
, set
);
1034 case 0x00: /* IGN Error (Ignored) */
1035 case 0x01: /* GATM guarded-area transfer mode (ignored) */
1036 case 0x02: /* KAM keyboard action mode (always reset) */
1037 case 0x03: /* CRM control representation mode (always reset) */
1038 case 0x05: /* SRTM status-reporting transfer mode */
1039 case 0x06: /* ERM erasure mode (always set) */
1040 case 0x07: /* VEM vertical editing mode (ignored) */
1041 case 0x0a: /* HEM horizontal editing mode */
1042 case 0x0b: /* PUM positioning unit mode */
1043 case 0x0c: /* SRM send/receive mode (echo on/off) */
1044 case 0x0d: /* FEAM format effector action mode */
1045 case 0x0e: /* FETM format effector transfer mode */
1046 case 0x0f: /* MATM multiple area transfer mode */
1047 case 0x10: /* TTM transfer termination mode */
1048 case 0x11: /* SATM selected area transfer mode */
1049 case 0x12: /* TSM tabulation stop mode */
1050 case 0x13: /* EBM editing boundary mode */
1051 /* DEC Private Modes: "?NUM" -> (NUM | 0x80) */
1052 case 0x80: /* IGN Error (Ignored) */
1053 case 0x81: /* DECCKM Cursorkeys application (set); Cursorkeys normal (reset) */
1054 case 0x82: /* DECANM ANSI (set); VT52 (reset) */
1055 case 0x83: /* DECCOLM 132 columns (set); 80 columns (reset) */
1056 case 0x84: /* DECSCLM Jump scroll (set); Smooth scroll (reset) */
1057 case 0x85: /* DECSCNM Reverse screen (set); Normal screen (reset) */
1058 case 0x88: /* DECARM Auto Repeat */
1059 case 0x89: /* DECINLM Interlace */
1060 case 0x92: /* DECPFF Send FF to printer after print screen (set); No char after PS (reset) */
1061 case 0x93: /* DECPEX Print screen: prints full screen (set); prints scroll region (reset) */
1063 unknown("modeseq", c
);