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 #define MAXLINES (1 << 8)
43 static int dirty
[MAXLINES
];
46 static char fgcolor(void)
48 int c
= mode
& ATTR_REV
? bg
: fg
;
51 if (mode
& ATTR_ITALIC
)
56 static char bgcolor(void)
58 return mode
& ATTR_REV
? fg
: bg
;
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
];
68 pad_put(screen
[i
], r
, c
, fg
, bg
);
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)
136 _draw_pos(row
, col
, 0);
137 for (i
= 0; i
< pad_rows(); i
++)
140 _draw_pos(row
, col
, 1);
143 static void screen_reset(int i
, int n
)
145 memset(screen
+ i
, 0, n
* sizeof(*screen
));
146 memset(fgs
+ i
, fg
, n
);
147 memset(bgs
+ i
, bg
, n
);
150 static void screen_move(int dst
, int src
, int n
)
152 memmove(screen
+ dst
, screen
+ src
, n
* sizeof(*screen
));
153 memmove(fgs
+ dst
, fgs
+ src
, n
);
154 memmove(bgs
+ dst
, bgs
+ src
, n
);
157 /* terminal input buffering */
159 #define PTYBUFSIZE (1 << 13)
161 static char ptybuf
[PTYBUFSIZE
]; /* always emptied in term_read() */
162 static int ptylen
; /* buffer length */
163 static int ptycur
; /* current offset */
165 static void waitpty(void)
167 struct pollfd ufds
[1];
168 ufds
[0].fd
= term
->fd
;
169 ufds
[0].events
= POLLIN
;
173 static int readpty(void)
176 return (unsigned char) ptybuf
[ptycur
++];
179 ptylen
= read(term
->fd
, ptybuf
, PTYBUFSIZE
);
180 if (ptylen
== -1 && errno
== EAGAIN
) {
182 ptylen
= read(term
->fd
, ptybuf
, PTYBUFSIZE
);
186 return (unsigned char) ptybuf
[0];
191 /* term interface functions */
193 void term_send(int c
)
197 write(term
->fd
, &b
, 1);
200 static void term_sendstr(char *s
)
203 write(term
->fd
, s
, strlen(s
));
206 static void term_blank(void)
208 screen_reset(0, pad_rows() * pad_cols());
210 pad_blank(bgcolor());
213 static void ctlseq(void);
217 while (ptycur
< ptylen
) {
218 if (!lazy
&& ptylen
- ptycur
> 15)
227 static void term_reset(void)
238 static int _openpty(int *master
, int *slave
)
243 if ((*master
= open("/dev/ptmx", O_RDWR
)) == -1)
245 if (ioctl(*master
, TIOCSPTLCK
, &unlock
) == -1)
247 if (ioctl(*master
, TIOCGPTN
, &ptyno
) == -1)
249 sprintf(name
, "/dev/pts/%d", ptyno
);
250 *slave
= open(name
, O_RDWR
| O_NOCTTY
);
254 static void _login(int fd
)
257 winp
.ws_col
= pad_cols();
258 winp
.ws_row
= pad_rows();
262 ioctl(fd
, TIOCSCTTY
, NULL
);
263 ioctl(fd
, TIOCSWINSZ
, &winp
);
271 #define MAXENV (1 << 8)
273 static void envcpy(char **d
, char **s
)
280 static void execvep(char *cmd
, char **argv
, char **envp
)
283 char *p
= getenv("PATH");
284 execve(cmd
, argv
, envp
);
287 while (*p
&& *p
!= ':')
291 execve(path
, argv
, envp
);
297 extern char **environ
;
298 void term_exec(char **args
)
301 memset(term
, 0, sizeof(*term
));
302 if (_openpty(&master
, &slave
) == -1)
304 if ((term
->pid
= fork()) == -1)
307 char *envp
[MAXENV
] = {"TERM=linux"};
308 envcpy(envp
+ 1, environ
);
311 execvep(args
[0], args
, envp
);
316 fcntl(term
->fd
, F_SETFD
, fcntl(term
->fd
, F_GETFD
) | FD_CLOEXEC
);
317 fcntl(term
->fd
, F_SETFL
, fcntl(term
->fd
, F_GETFL
) | O_NONBLOCK
);
319 memset(term
->hist
, 0, sizeof(term
->hist
));
322 static void misc_save(struct term_state
*state
)
331 static void misc_load(struct term_state
*state
)
340 void term_save(struct term
*term
)
343 misc_save(&term
->cur
);
348 static void term_redraw(void)
351 for (i
= 0; i
< pad_rows(); i
++)
353 _draw_pos(row
, col
, 1);
356 void term_load(struct term
*t
, int flags
)
359 misc_load(&term
->cur
);
360 screen
= term
->screen
;
366 if (flags
== TERM_REDRAW
) {
378 memset(term
, 0, sizeof(*term
));
379 term_load(term
, visible
? TERM_REDRAW
: TERM_HIDDEN
);
382 static int writeutf8(char *dst
, int c
)
387 *d
++ = 0xf0 | (c
>> 18);
389 } else if (c
> 0x7ff) {
390 *d
++ = 0xe0 | (c
>> 12);
392 } else if (c
> 0x7f) {
393 *d
++ = 0xc0 | (c
>> 6);
396 *d
++ = c
> 0 ? c
: ' ';
400 *d
++ = 0x80 | ((c
>> (l
* 6)) & 0x3f);
404 void term_screenshot(void)
407 int fd
= open(SCRSHOT
, O_CREAT
| O_TRUNC
| O_WRONLY
, 0600);
409 for (i
= 0; i
< pad_rows(); i
++) {
411 for (j
= 0; j
< pad_cols(); j
++)
412 if (~screen
[OFFSET(i
, j
)] & DWCHAR
)
413 s
+= writeutf8(s
, screen
[OFFSET(i
, j
)]);
415 write(fd
, buf
, s
- buf
);
420 /* high-level drawing functions */
422 static void empty_rows(int sr
, int er
)
424 screen_reset(OFFSET(sr
, 0), (er
- sr
) * pad_cols());
427 static void blank_rows(int sr
, int er
)
434 #define HISTROW(pos) (term->hist + ((term->histtail + NHIST - (pos)) % NHIST) * pad_cols())
436 static void scrl_rows(int nr
)
439 for (i
= 0; i
< nr
; i
++) {
440 memcpy(HISTROW(0), screen
+ i
* pad_cols(),
441 pad_cols() * sizeof(screen
[0]));
442 term
->histtail
= (term
->histtail
+ 1) % NHIST
;
446 void term_hist(int scrl
)
452 memset(dirty
, 1, sizeof(dirty
));
453 for (i
= 0; i
< pad_rows(); i
++) {
455 _scr
= HISTROW(scrl
- i
);
459 int off
= (i
- scrl
) * pad_cols();
460 _scr
= term
->screen
+ off
;
461 _fgs
= term
->fgs
+ off
;
462 _bgs
= term
->bgs
+ off
;
464 for (j
= 0; j
< pad_cols(); j
++)
465 pad_put(_scr
[j
], i
, j
, _fgs
? _fgs
[j
] : BGCOLOR
,
466 _bgs
? _bgs
[j
] : FGCOLOR
);
470 static void scroll_screen(int sr
, int nr
, int n
)
475 screen_move(OFFSET(sr
+ n
, 0), OFFSET(sr
, 0), nr
* pad_cols());
477 empty_rows(sr
, sr
+ n
);
479 empty_rows(sr
+ nr
+ n
, sr
+ nr
);
480 draw_rows(MIN(sr
, sr
+ n
), MAX(sr
+ nr
, sr
+ nr
+ n
));
484 static void insert_lines(int n
)
486 int sr
= MAX(top
, row
);
487 int nr
= bot
- row
- n
;
489 scroll_screen(sr
, nr
, n
);
492 static void delete_lines(int n
)
494 int r
= MAX(top
, row
);
496 int nr
= bot
- r
- n
;
498 scroll_screen(sr
, nr
, -n
);
501 static int origin(void)
503 return mode
& MODE_ORIGIN
;
506 static void move_cursor(int r
, int c
)
510 t
= origin() ? top
: 0;
511 b
= origin() ? bot
: pad_rows();
512 row
= LIMIT(r
, t
, b
- 1);
513 col
= LIMIT(c
, 0, pad_cols() - 1);
515 mode
= BIT_SET(mode
, MODE_WRAPREADY
, 0);
518 static void set_region(int t
, int b
)
520 top
= LIMIT(t
- 1, 0, pad_rows() - 1);
521 bot
= LIMIT(b
? b
: pad_rows(), top
+ 1, pad_rows());
526 static void setattr(int m
)
547 mode
&= ~ATTR_ITALIC
;
554 fg
= m
> 37 ? FGCOLOR
: m
- 30;
556 bg
= m
> 47 ? BGCOLOR
: m
- 40;
560 static void kill_chars(int sc
, int ec
)
563 for (i
= sc
; i
< ec
; i
++)
564 draw_char(0, row
, i
);
568 static void move_chars(int sc
, int nc
, int n
)
571 screen_move(OFFSET(row
, sc
+ n
), OFFSET(row
, sc
), nc
);
573 screen_reset(OFFSET(row
, sc
), n
);
575 screen_reset(OFFSET(row
, pad_cols() + n
), -n
);
576 draw_cols(row
, MIN(sc
, sc
+ n
), pad_cols());
580 static void delete_chars(int n
)
583 int nc
= pad_cols() - sc
;
584 move_chars(sc
, nc
, -n
);
587 static void insert_chars(int n
)
589 int nc
= pad_cols() - col
- n
;
590 move_chars(col
, nc
, n
);
593 static void advance(int dr
, int dc
, int scrl
)
597 if (dr
&& r
>= bot
&& scrl
) {
599 int nr
= (bot
- top
) + n
;
600 scroll_screen(top
+ -n
, nr
, n
);
602 if (dr
&& r
< top
&& scrl
) {
604 int nr
= (bot
- top
) - n
;
605 scroll_screen(top
, nr
, n
);
607 r
= dr
? LIMIT(r
, top
, bot
- 1) : r
;
608 c
= LIMIT(c
, 0, pad_cols() - 1);
612 static void insertchar(int c
)
614 if (mode
& MODE_WRAPREADY
)
616 if (mode
& MODE_INSERT
)
618 draw_char(c
, row
, col
);
619 if (col
== pad_cols() - 1)
620 mode
= BIT_SET(mode
, MODE_WRAPREADY
, 1);
626 /* partial vt102 implementation */
628 static void escseq(void);
629 static void escseq_cs(void);
630 static void escseq_g0(void);
631 static void escseq_g1(void);
632 static void escseq_g2(void);
633 static void escseq_g3(void);
634 static void csiseq(void);
635 static void csiseq_da(int c
);
636 static void csiseq_dsr(int c
);
637 static void modeseq(int c
, int set
);
639 /* comments taken from: http://www.ivarch.com/programs/termvt102.shtml */
641 static int readutf8(int c
)
647 while (l
< 6 && c
& (0x40 >> l
))
649 result
= (0x3f >> l
) & c
;
651 result
= (result
<< 6) | (readpty() & 0x3f);
655 #define unknown(ctl, c)
657 /* control sequences */
658 static void ctlseq(void)
662 case 0x09: /* HT horizontal tab to next tab stop */
663 advance(0, 8 - col
% 8, 0);
665 case 0x0a: /* LF line feed */
666 case 0x0b: /* VT line feed */
667 case 0x0c: /* FF line feed */
668 advance(1, (mode
& MODE_AUTOCR
) ? -col
: 0, 1);
670 case 0x08: /* BS backspace one column */
673 case 0x1b: /* ESC start escape sequence */
676 case 0x0d: /* CR carriage return */
679 case 0x00: /* NUL ignored */
680 case 0x07: /* BEL beep */
681 case 0x7f: /* DEL ignored */
683 case 0x05: /* ENQ trigger answerback message */
684 case 0x0e: /* SO activate G1 character set & newline */
685 case 0x0f: /* SI activate G0 character set */
686 case 0x11: /* XON resume transmission */
687 case 0x13: /* XOFF stop transmission, ignore characters */
688 case 0x18: /* CAN interrupt escape sequence */
689 case 0x1a: /* SUB interrupt escape sequence */
690 case 0x9b: /* CSI equivalent to ESC [ */
691 unknown("ctlseq", c
);
695 if (isdw(c
) && col
+ 1 == pad_cols() && ~mode
& MODE_WRAPREADY
)
700 insertchar(c
| DWCHAR
);
705 #define ESCM(c) (((c) & 0xf0) == 0x20)
706 #define ESCF(c) ((c) > 0x30 && (c) < 0x7f)
708 /* escape sequences */
709 static void escseq(void)
715 case '[': /* CSI control sequence introducer */
718 case '%': /* CS... escseq_cs table */
721 case '(': /* G0... escseq_g0 table */
724 case ')': /* G1... escseq_g1 table */
727 case '*': /* G2... escseq_g2 table */
730 case '+': /* G3... escseq_g3 table */
733 case '7': /* DECSC save state (position, charset, attributes) */
734 misc_save(&term
->sav
);
736 case '8': /* DECRC restore most recently saved state */
737 misc_load(&term
->sav
);
739 case 'M': /* RI reverse line feed */
742 case 'D': /* IND line feed */
745 case 'E': /* NEL newline */
748 case 'c': /* RIS reset */
751 case 'H': /* HTS set tab stop at current column */
752 case 'Z': /* DECID DEC private ID; return ESC [ ? 6 c (VT102) */
753 case '#': /* DECALN ("#8") DEC alignment test - fill screen with E's */
754 case '>': /* DECPNM set numeric keypad mode */
755 case '=': /* DECPAM set application keypad mode */
756 case 'N': /* SS2 select G2 charset for next char only */
757 case 'O': /* SS3 select G3 charset for next char only */
758 case 'P': /* DCS device control string (ended by ST) */
759 case 'X': /* SOS start of string */
760 case '^': /* PM privacy message (ended by ST) */
761 case '_': /* APC application program command (ended by ST) */
762 case '\\': /* ST string terminator */
763 case 'n': /* LS2 invoke G2 charset */
764 case 'o': /* LS3 invoke G3 charset */
765 case '|': /* LS3R invoke G3 charset as GR */
766 case '}': /* LS2R invoke G2 charset as GR */
767 case '~': /* LS1R invoke G1 charset as GR */
768 case ']': /* OSC operating system command */
769 case 'g': /* BEL alternate BEL */
771 unknown("escseq", c
);
776 static void escseq_cs(void)
780 case '@': /* CSDFL select default charset (ISO646/8859-1) */
781 case 'G': /* CSUTF8 select UTF-8 */
782 case '8': /* CSUTF8 select UTF-8 (obsolete) */
784 unknown("escseq_cs", c
);
789 static void escseq_g0(void)
793 case '8': /* G0DFL G0 charset = default mapping (ISO8859-1) */
794 case '0': /* G0GFX G0 charset = VT100 graphics mapping */
795 case 'U': /* G0ROM G0 charset = null mapping (straight to ROM) */
796 case 'K': /* G0USR G0 charset = user defined mapping */
797 case 'B': /* G0TXT G0 charset = ASCII mapping */
799 unknown("escseq_g0", c
);
804 static void escseq_g1(void)
808 case '8': /* G1DFL G1 charset = default mapping (ISO8859-1) */
809 case '0': /* G1GFX G1 charset = VT100 graphics mapping */
810 case 'U': /* G1ROM G1 charset = null mapping (straight to ROM) */
811 case 'K': /* G1USR G1 charset = user defined mapping */
812 case 'B': /* G1TXT G1 charset = ASCII mapping */
814 unknown("escseq_g1", c
);
819 static void escseq_g2(void)
823 case '8': /* G2DFL G2 charset = default mapping (ISO8859-1) */
824 case '0': /* G2GFX G2 charset = VT100 graphics mapping */
825 case 'U': /* G2ROM G2 charset = null mapping (straight to ROM) */
826 case 'K': /* G2USR G2 charset = user defined mapping */
828 unknown("escseq_g2", c
);
833 static void escseq_g3(void)
837 case '8': /* G3DFL G3 charset = default mapping (ISO8859-1) */
838 case '0': /* G3GFX G3 charset = VT100 graphics mapping */
839 case 'U': /* G3ROM G3 charset = null mapping (straight to ROM) */
840 case 'K': /* G3USR G3 charset = user defined mapping */
842 unknown("escseq_g3", c
);
847 static int absrow(int r
)
849 return origin() ? top
+ r
: r
;
852 #define CSIP(c) (((c) & 0xf0) == 0x30)
853 #define CSII(c) (((c) & 0xf0) == 0x20)
854 #define CSIF(c) ((c) >= 0x40 && (c) < 0x80)
856 #define MAXCSIARGS 32
857 /* ECMA-48 CSI sequences */
858 static void csiseq(void)
860 int args
[MAXCSIARGS
] = {0};
866 if (strchr("<=>?", c
)) {
873 arg
= arg
* 10 + (c
- '0');
884 case 'H': /* CUP move cursor to row, column */
885 case 'f': /* HVP move cursor to row, column */
886 move_cursor(absrow(MAX(0, args
[0] - 1)), MAX(0, args
[1] - 1));
888 case 'J': /* ED erase display */
891 kill_chars(col
, pad_cols());
892 blank_rows(row
+ 1, pad_rows());
895 kill_chars(0, col
+ 1);
896 blank_rows(0, row
- 1);
903 case 'A': /* CUU move cursor up */
904 advance(-MAX(1, args
[0]), 0, 0);
906 case 'e': /* VPR move cursor down */
907 case 'B': /* CUD move cursor down */
908 advance(MAX(1, args
[0]), 0, 0);
910 case 'a': /* HPR move cursor right */
911 case 'C': /* CUF move cursor right */
912 advance(0, MAX(1, args
[0]), 0);
914 case 'D': /* CUB move cursor left */
915 advance(0, -MAX(1, args
[0]), 0);
917 case 'K': /* EL erase line */
920 kill_chars(col
, pad_cols());
923 kill_chars(0, col
+ 1);
926 kill_chars(0, pad_cols());
930 case 'L': /* IL insert blank lines */
931 if (row
>= top
&& row
< bot
)
932 insert_lines(MAX(1, args
[0]));
934 case 'M': /* DL delete lines */
935 if (row
>= top
&& row
< bot
)
936 delete_lines(MAX(1, args
[0]));
938 case 'd': /* VPA move to row (current column) */
939 move_cursor(absrow(MAX(1, args
[0]) - 1), col
);
941 case 'm': /* SGR set graphic rendition */
944 for (i
= 0; i
< n
; i
++)
947 case 'r': /* DECSTBM set scrolling region to (top, bottom) rows */
948 set_region(args
[0], args
[1]);
950 case 'c': /* DA return ESC [ ? 6 c (VT102) */
951 csiseq_da(priv
== '?' ? args
[0] | 0x80 : args
[0]);
953 case 'h': /* SM set mode */
954 for (i
= 0; i
< n
; i
++)
955 modeseq(priv
== '?' ? args
[i
] | 0x80 : args
[i
], 1);
957 case 'l': /* RM reset mode */
958 for (i
= 0; i
< n
; i
++)
959 modeseq(priv
== '?' ? args
[i
] | 0x80 : args
[i
], 0);
961 case 'P': /* DCH delete characters on current line */
962 delete_chars(LIMIT(args
[0], 1, pad_cols() - col
));
964 case '@': /* ICH insert blank characters */
965 insert_chars(LIMIT(args
[0], 1, pad_cols() - col
));
967 case 'n': /* DSR device status report */
970 case 'G': /* CHA move cursor to column in current row */
971 advance(0, MAX(0, args
[0] - 1) - col
, 0);
973 case 'X': /* ECH erase characters on current line */
974 kill_chars(col
, MIN(col
+ MAX(1, args
[0]), pad_cols()));
976 case '[': /* IGN ignored control sequence */
977 case 'E': /* CNL move cursor down and to column 1 */
978 case 'F': /* CPL move cursor up and to column 1 */
979 case 'g': /* TBC clear tab stop (CSI 3 g = clear all stops) */
980 case 'q': /* DECLL set keyboard LEDs */
981 case 's': /* CUPSV save cursor position */
982 case 'u': /* CUPRS restore cursor position */
983 case '`': /* HPA move cursor to column in current row */
985 unknown("csiseq", c
);
990 static void csiseq_da(int c
)
994 term_sendstr("\x1b[?6c");
997 /* we don't care much about cursor shape */
998 /* printf("csiseq_da <0x%x>\n", c); */
1003 static void csiseq_dsr(int c
)
1005 char status
[1 << 5];
1008 term_sendstr("\x1b[0n");
1011 sprintf(status
, "\x1b[%d;%dR",
1012 (origin() ? row
- top
: row
) + 1, col
+ 1);
1013 term_sendstr(status
);
1016 unknown("csiseq_dsr", c
);
1021 /* ANSI/DEC specified modes for SM/RM ANSI Specified Modes */
1022 static void modeseq(int c
, int set
)
1025 case 0x87: /* DECAWM Auto Wrap */
1026 mode
= BIT_SET(mode
, MODE_WRAP
, set
);
1028 case 0x99: /* DECTCEM Cursor on (set); Cursor off (reset) */
1029 mode
= BIT_SET(mode
, MODE_CURSOR
, set
);
1031 case 0x86: /* DECOM Sets relative coordinates (set); Sets absolute coordinates (reset) */
1032 mode
= BIT_SET(mode
, MODE_ORIGIN
, set
);
1034 case 0x14: /* LNM Line Feed / New Line Mode */
1035 mode
= BIT_SET(mode
, MODE_AUTOCR
, set
);
1037 case 0x04: /* IRM insertion/replacement mode (always reset) */
1038 mode
= BIT_SET(mode
, MODE_INSERT
, set
);
1040 case 0x00: /* IGN Error (Ignored) */
1041 case 0x01: /* GATM guarded-area transfer mode (ignored) */
1042 case 0x02: /* KAM keyboard action mode (always reset) */
1043 case 0x03: /* CRM control representation mode (always reset) */
1044 case 0x05: /* SRTM status-reporting transfer mode */
1045 case 0x06: /* ERM erasure mode (always set) */
1046 case 0x07: /* VEM vertical editing mode (ignored) */
1047 case 0x0a: /* HEM horizontal editing mode */
1048 case 0x0b: /* PUM positioning unit mode */
1049 case 0x0c: /* SRM send/receive mode (echo on/off) */
1050 case 0x0d: /* FEAM format effector action mode */
1051 case 0x0e: /* FETM format effector transfer mode */
1052 case 0x0f: /* MATM multiple area transfer mode */
1053 case 0x10: /* TTM transfer termination mode */
1054 case 0x11: /* SATM selected area transfer mode */
1055 case 0x12: /* TSM tabulation stop mode */
1056 case 0x13: /* EBM editing boundary mode */
1057 /* DEC Private Modes: "?NUM" -> (NUM | 0x80) */
1058 case 0x80: /* IGN Error (Ignored) */
1059 case 0x81: /* DECCKM Cursorkeys application (set); Cursorkeys normal (reset) */
1060 case 0x82: /* DECANM ANSI (set); VT52 (reset) */
1061 case 0x83: /* DECCOLM 132 columns (set); 80 columns (reset) */
1062 case 0x84: /* DECSCLM Jump scroll (set); Smooth scroll (reset) */
1063 case 0x85: /* DECSCNM Reverse screen (set); Normal screen (reset) */
1064 case 0x88: /* DECARM Auto Repeat */
1065 case 0x89: /* DECINLM Interlace */
1066 case 0x92: /* DECPFF Send FF to printer after print screen (set); No char after PS (reset) */
1067 case 0x93: /* DECPEX Print screen: prints full screen (set); prints scroll region (reset) */
1069 unknown("modeseq", c
);