2 Generalized console input/output handler
3 Kern Sibbald, December MMIII
21 /* Global functions imported */
24 extern char *getenv(char *);
26 static void add_smap(char *str, int func);
28 /* From termios library */
32 /* Global variables */
34 static char *t_up = "\n"; /* scroll up character */
35 static char *t_honk = "\007"; /* sound beep */
36 static char *t_il; /* insert line */
37 static char *t_dl; /* delete line */
38 static char *t_cs; /* clear screen */
39 static char *t_cl; /* clear line */
40 static int t_width = 79; /* terminal width */
41 static int t_height = 24; /* terminal height */
42 static int linsdel_ok = 0; /* set if term has line insert & delete fncs */
44 static char *t_cm; /* cursor positioning */
45 static char *t_ti; /* init sequence */
46 static char *t_te; /* end sequence */
47 static char *t_do; /* down one line */
48 static char *t_sf; /* scroll screen one line up */
50 /* Keypad and Function Keys */
51 static char *kl; /* left key */
52 static char *kr; /* right */
53 static char *ku; /* up */
54 static char *kd; /* down */
55 static char *kh; /* home */
56 static char *kb; /* backspace */
57 static char *kD; /* delete key */
58 static char *kI; /* insert */
59 static char *kN; /* next page */
60 static char *kP; /* previous page */
61 static char *kH; /* home */
62 static char *kE; /* end */
65 #define EOS '\0' /* end of string terminator */
71 * Stab entry. Input chars (str), the length, and the desired
74 typedef struct s_stab {
83 static stab_t **stab = NULL; /* array of stabs by length */
84 static int num_stab; /* size of stab array */
88 static bool old_term_params_set = false;
89 static struct termios old_term_params;
91 /* Maintain lines in a doubly linked circular pool of lines. Each line is
92 preceded by a header defined by the lstr structure */
95 struct lstr { /* line pool structure */
96 struct lstr *prevl; /* link to previous line */
97 struct lstr *nextl; /* link to next line */
98 long len; /* length of line+header */
99 char used; /* set if line valid */
100 char line; /* line is actually varying length */
104 #define POOLEN 128000 /* bytes in line pool */
106 #define POOLEN 500 /* bytes in line pool */
108 char pool[POOLEN]; /* line pool */
109 #define PHDRL ((int)sizeof(struct lstr)) /* length of line header */
111 static struct lstr *lptr; /* current line pointer */
112 static struct lstr *slptr; /* store line pointer */
114 static char *getnext(), *getprev();
115 static int first = 1;
116 static int mode_insert = 0;
117 static int mode_wspace = 1; /* words separated by spaces */
119 /* Forward referenced functions */
120 static void sigintcatcher(int);
122 /* Global variables Exported */
124 static short char_map[600]= {
125 0, F_SOL, /* ^a Line start */
126 F_PRVWRD, /* ^b Previous word */ F_BREAK, /* ^C break */
127 F_DELCHR, /* ^D Delete character */ F_EOL, /* ^e End of line */
128 F_CSRRGT, /* ^f Right */ F_TABBAK, /* ^G Back tab */
129 F_CSRLFT, /* ^H Left */ F_TAB, /* ^I Tab */
130 F_CSRDWN, /* ^J Down */ F_DELEOL, /* ^K kill to eol */
131 F_CLRSCRN,/* ^L clear screen */ F_RETURN, /* ^M Carriage return */
132 F_RETURN, /* ^N enter line */ F_CONCAT, /* ^O Concatenate lines */
133 F_CSRUP, /* ^P cursor up */ F_TINS, /* ^Q Insert character mode */
134 F_PAGUP, /* ^R Page up */ F_CENTER, /* ^S Center text */
135 F_PAGDWN, /* ^T Page down */ F_DELSOL, /* ^U delete to start of line */
136 F_DELWRD, /* ^V Delete word */ F_PRVWRD, /* ^W Previous word */
137 F_NXTMCH, /* ^X Next match */ F_DELEOL, /* ^Y Delete to end of line */
138 F_BACKGND,/* ^Z Background */ 0x1B, /* ^[=ESC escape */
139 F_TENTRY, /* ^\ Entry mode */ F_PASTECB,/* ^]=paste clipboard */
140 F_HOME, /* ^^ Home */ F_ERSLIN, /* ^_ Erase line */
142 ' ','!','"','#','$','%','&','\047',
143 '(',')','*','+','\054','-','.','/',
144 '0','1','2','3','4','5','6','7',
145 '8','9',':',';','<','=','>','?',
146 '@','A','B','C','D','E','F','G',
147 'H','I','J','K','L','M','N','O',
148 'P','Q','R','S','T','U','V','W',
149 'X','Y','Z','[','\\',']','^','_',
150 '\140','a','b','c','d','e','f','g',
151 'h','i','j','k','l','m','n','o',
152 'p','q','r','s','t','u','v','w',
153 'x','y','z','{','|','}','\176',F_ERSCHR /* erase character */
158 #define NVID 0x1E /* normal video -- blue */
159 #define RVID 0x4F /* reverse video -- red */
160 #define MNVID 0x07 /* normal video (monochrome tube) */
161 #define MRVID 0x70 /* reverse video (monochrome tube) */
164 /* Local variables */
166 #define CR '\r' /* carriage return */
169 /* Function Prototypes */
171 static int input_char(void);
172 static int t_gnc(void);
173 static void insert_space(char *curline, int line_len);
174 static void forward(int i, char *str, int str_len);
175 static void backup(int i);
176 static void delchr(int cnt, char *curline, int line_len);
177 static int iswordc(char c);
178 static int next_word(char *ldb_buf);
179 static int prev_word(char *ldb_buf);
180 static void prtcur(char *str);
181 static void poolinit(void);
182 static char * getnext(void);
183 static char * getprev(void);
184 static void putline(char *newl, int newlen);
185 static void t_honk_horn(void);
186 static void t_insert_line(void);
187 static void t_delete_line(void);
188 static void t_clrline(int pos, int width);
189 void t_sendl(char *msg, int len);
190 void t_send(char *msg);
192 static void asclrs();
193 static void ascurs(int y, int x);
195 static void rawmode(FILE *input);
196 static void normode(void);
197 static int t_getch();
198 static void trapctlc();
199 static void asclrl(int pos, int width);
200 static void asinsl();
201 static void asdell();
203 int input_line(char *string, int length);
205 void con_init(FILE *input)
214 void con_set_zed_keys(void)
216 char_map[1] = F_NXTWRD; /* ^A Next Word */
217 char_map[2] = F_SPLIT; /* ^B Split line */
218 char_map[3] = F_EOI; /* ^C Quit */
219 char_map[4] = F_DELCHR; /* ^D Delete character */
220 char_map[5] = F_EOF; /* ^E End of file */
221 char_map[6] = F_INSCHR; /* ^F Insert character */
222 char_map[7] = F_TABBAK; /* ^G Back tab */
223 char_map[8] = F_CSRLFT; /* ^H Left */
224 char_map[9] = F_TAB; /* ^I Tab */
225 char_map[10] = F_CSRDWN; /* ^J Down */
226 char_map[11] = F_CSRUP; /* ^K Up */
227 char_map[12] = F_CSRRGT; /* ^L Right */
228 char_map[13] = F_RETURN; /* ^M Carriage return */
229 char_map[14] = F_EOL; /* ^N End of line */
230 char_map[15] = F_CONCAT; /* ^O Concatenate lines */
231 char_map[16] = F_MARK; /* ^P Set marker */
232 char_map[17] = F_TINS; /* ^Q Insert character mode */
233 char_map[18] = F_PAGUP; /* ^R Page up */
234 char_map[19] = F_CENTER; /* ^S Center text */
235 char_map[20] = F_PAGDWN; /* ^T Page down */
236 char_map[21] = F_SOL; /* ^U Line start */
237 char_map[22] = F_DELWRD; /* ^V Delete word */
238 char_map[23] = F_PRVWRD; /* ^W Previous word */
239 char_map[24] = F_NXTMCH; /* ^X Next match */
240 char_map[25] = F_DELEOL; /* ^Y Delete to end of line */
241 char_map[26] = F_DELLIN; /* ^Z Delete line */
243 char_map[28] = F_TENTRY; /* ^\ Entry mode */
244 char_map[29] = F_PASTECB;/* ^]=paste clipboard */
245 char_map[30] = F_HOME; /* ^^ Home */
246 char_map[31] = F_ERSLIN; /* ^_ Erase line */
257 * Guarantee that the string is properly terminated */
258 static char *bstrncpy(char *dest, const char *src, int maxlen)
260 strncpy(dest, src, maxlen-1);
268 * New style string mapping to function code
270 static int do_smap(int c)
289 for (i=len-1; i<MAX_STAB; i++) {
290 for (tstab=stab[i]; tstab; tstab=tstab->next) {
291 if (strncmp(str, tstab->str, len) == 0) {
292 if (len == tstab->len) {
296 break; /* found possibility continue searching */
303 /* found partial match, so get next character and retry */
304 str[len++] = t_gnc();
310 static void dump_stab()
316 for (i=0; i<MAX_STAB; i++) {
317 for (tstab=stab[i]; tstab; tstab=tstab->next) {
318 for (j=0; j<tstab->len; j++) {
320 if (c < 0x20 || c > 0x7F) {
321 sprintf(buf, " 0x%x ", c);
329 sprintf(buf, " func=%d len=%d\n\r", tstab->func, tstab->len);
337 * New routine. Add string to string->func mapping table.
339 static void add_smap(char *str, int func)
349 /* errmsg("String for func %d is zero length\n", func); */
352 tstab = (stab_t *)malloc(sizeof(stab_t));
353 memset(tstab, 0, sizeof(stab_t));
355 tstab->str = (char *)malloc(tstab->len + 1);
356 bstrncpy(tstab->str, str, tstab->len + 1);
358 if (tstab->len > num_stab) {
359 printf("stab string too long %d. Max is %d\n", tstab->len, num_stab);
362 tstab->next = stab[tstab->len-1];
363 stab[tstab->len-1] = tstab;
364 /* printf("Add_smap tstab=%x len=%d func=%d tstab->next=%x\n\r", tstab, len,
365 func, tstab->next); */
370 /* Get the next character from the terminal - performs table lookup on
371 the character to do the desired translation */
377 if ((c=t_gnc()) <= 599) { /* IBM generates codes up to 260 */
379 } else if (c > 1000) { /* stuffed function */
380 c -= 1000; /* convert back to function code */
385 /* if we got a screen size escape sequence, read height, width */
388 y = t_gnc() - 0x20; /* y */
389 x = t_gnc() - 0x20; /* x */
396 /* Get a complete input line */
399 /*FCN*/input_line(char *string, int length)
401 char curline[200]; /* edit buffer */
406 poolinit(); /* build line pool */
409 noline = 1; /* no line fetched yet */
410 for (cl=cp=0; cl<length && cl<(int)sizeof(curline); ) {
411 switch (c=(int)input_char()) {
412 case F_RETURN: /* CR */
413 t_sendl("\r\n", 2); /* yes, print it and */
414 goto done; /* get out */
415 case F_CLRSCRN: /* clear screen */
417 t_sendl(curline, cl);
421 if (noline) { /* no line fetched yet */
422 getnext(); /* getnext so getprev gets current */
423 noline = 0; /* we now have line */
425 bstrncpy(curline, getprev(), sizeof(curline));
429 noline = 0; /* mark line fetched */
430 bstrncpy(curline, getnext(), sizeof(curline));
434 insert_space(curline, sizeof(curline));
437 delchr(1, curline, sizeof(curline)); /* delete one character */
439 case F_CSRLFT: /* Backspace */
443 forward(1,curline, sizeof(curline));
445 case F_ERSCHR: /* Rubout */
447 delchr(1, curline, sizeof(curline));
450 t_clrline(0, t_width);
455 forward(next_word(curline),curline, sizeof(curline));
458 backup(prev_word(curline));
461 delchr(next_word(curline), curline, sizeof(curline)); /* delete word */
463 case F_NXTMCH: /* Ctl-X */
465 *string = EOS; /* terminate string */
466 return(c); /* give it to him */
468 /* Note fall through */
471 backup(cp); /* backup to beginning of line */
472 t_clrline(0,t_width); /* erase line */
474 cl = 0; /* reset cursor counter */
481 forward(1,curline, sizeof(curline));
487 case F_TINS: /* toggle insert mode */
488 mode_insert = !mode_insert; /* flip bit */
491 if (c > 255) { /* function key hit */
492 if (cl==0) { /* if first character then */
493 *string = EOS; /* terminate string */
494 return c; /* return it */
496 t_honk_horn(); /* complain */
499 insert_space(curline, sizeof(curline));
501 curline[cp++] = c; /* store character in line being built */
502 t_char((char)c); /* echo character to terminal */
504 cl = cp; /* keep current length */
510 /* If we fall through here rather than goto done, the line is too long
511 simply return what we have now. */
513 curline[cl++] = EOS; /* terminate */
514 bstrncpy(string,curline,length); /* return line to caller */
515 /* Note, put line zaps curline */
516 putline(curline,cl); /* save line for posterity */
517 return 0; /* give it to him/her */
520 /* Insert a space at the current cursor position */
522 /*FCN*/insert_space(char *curline, int curline_len)
526 if (cp > cl || cl+1 > curline_len) return;
527 /* Note! source and destination overlap */
528 memmove(&curline[cp+1],&curline[cp],i=cl-cp);
532 forward(i,curline, curline_len);
537 /* Move cursor forward keeping characters under it */
539 /*FCN*/forward(int i,char *str, int str_len)
555 /* Backup cursor keeping characters under it */
559 for ( ;i && cp; i--,cp--)
563 /* Delete the character under the cursor */
565 /*FCN*/delchr(int cnt, char *curline, int line_len)
571 if ((i=cl-cp-cnt+1) > 0) {
572 memcpy(&curline[cp],&curline[cp+cnt],i);
574 curline[cl -= cnt] = EOS;
575 t_clrline(0,t_width);
577 forward(i=cl-cp,curline, line_len);
582 /* Determine if character is part of a word */
584 /*FCN*/iswordc(char c)
588 if (c >= '0' && c <= '9')
590 if (c == '$' || c == '%')
595 /* Return number of characters to get to next word */
597 /*FCN*/next_word(char *ldb_buf)
604 for ( ; ncp<cl && iswordc(*(ldb_buf+ncp)); ncp++) ;
605 for ( ; ncp<cl && !iswordc(*(ldb_buf+ncp)); ncp++) ;
609 /* Return number of characters to get to previous word */
611 /*FCN*/prev_word(char *ldb_buf)
615 if (cp == 0) /* if at begin of line stop now */
617 if (cp > cl) /* if past eol start at eol */
621 /* backup to end of previous word - i.e. skip special chars */
622 for (i=ncp-1; i && !iswordc(*(ldb_buf+i)); i--) ;
623 if (i == 0) { /* at beginning of line? */
624 return cp; /* backup to beginning */
626 /* now move back through word to beginning of word */
627 for ( ; i && iswordc(*(ldb_buf+i)); i--) ;
628 ncp = i+1; /* position to first char of word */
629 if (i==0 && iswordc(*ldb_buf)) /* check for beginning of line */
631 return cp-ncp; /* return count */
634 /* Display new current line */
636 /*FCN*/prtcur(char *str)
639 t_clrline(0,t_width);
640 cp = cl = strlen(str);
645 /* Initialize line pool. Split pool into two pieces. */
649 slptr = lptr = (struct lstr *)pool;
658 /* Return pointer to next line in the pool and advance current line pointer */
662 do { /* find next used line */
664 } while (!lptr->used);
665 return (char *)&lptr->line;
668 /* Return pointer to previous line in the pool */
672 do { /* find previous used line */
674 } while (!lptr->used);
675 return (char *)&lptr->line;
679 /*FCN*/putline(char *newl, int newlen)
681 struct lstr *nptr; /* points to next line */
684 lptr = slptr; /* get ptr to last line stored */
685 lptr = lptr->nextl; /* advance pointer */
686 if ((char *)lptr-pool+newlen+PHDRL > POOLEN) { /* not enough room */
687 lptr->used = 0; /* delete line */
688 lptr = (struct lstr *)pool; /* start at beginning of buffer */
690 while (lptr->len < newlen+PHDRL) { /* concatenate buffers */
691 nptr = lptr->nextl; /* point to next line */
692 lptr->nextl = nptr->nextl; /* unlink it from list */
693 nptr->nextl->prevl = lptr;
694 lptr->len += nptr->len;
696 if (lptr->len > newlen + 2 * PHDRL) { /* split buffer */
697 nptr = (struct lstr *)((char *)lptr + newlen + PHDRL);
698 /* Appropriate byte alignment - normally 2 byte, but on
699 sparc we need 4 byte alignment, so we always do 4 */
700 if (((unsigned)nptr & 3) != 0) { /* test four byte alignment */
702 nptr = (struct lstr *)((((unsigned) p) & ~3) + 4);
704 nptr->len = lptr->len - ((char *)nptr - (char *)lptr);
705 lptr->len -= nptr->len;
706 nptr->nextl = lptr->nextl; /* link in new buffer */
707 lptr->nextl->prevl = nptr;
712 memcpy(&lptr->line,newl,newlen);
713 lptr->used = 1; /* mark line used */
714 slptr = lptr; /* save as stored line */
719 /*FCN*/dump(struct lstr *ptr, char *msg)
721 printf("%s buf=%x nextl=%x prevl=%x len=%d used=%d\n",
722 msg,ptr,ptr->nextl,ptr->prevl,ptr->len,ptr->used);
724 printf("line=%s\n",&ptr->line);
726 #endif /* DEBUGOUT */
729 /* Honk horn on terminal */
736 /* Insert line on terminal */
738 /*FCN*/t_insert_line()
743 /* Delete line from terminal */
745 /*FCN*/t_delete_line()
750 /* clear line from pos to width */
752 /*FCN*/t_clrline(int pos, int width)
754 asclrl(pos, width); /* clear to end of line */
757 /* Helper function to add string preceded by
758 * ESC to smap table */
759 static void add_esc_smap(char *str, int func)
762 buf[0] = 0x1B; /* esc */
763 bstrncpy(buf+1, str, sizeof(buf)-1);
767 /* Set raw mode on terminal file. Basically, get the terminal into a
768 mode in which all characters can be read as they are entered. CBREAK
769 mode is not sufficient.
771 /*FCN*/static void rawmode(FILE *input)
774 static char term_buf[2048];
775 static char *term_buffer = term_buf;
776 char *termtype = (char *)getenv("TERM");
778 /* Make sure we are dealing with a terminal */
779 if (!isatty(fileno(input))) {
782 if (tcgetattr(0, &old_term_params) != 0) {
783 printf(_("conio: Cannot tcgetattr()\n"));
786 old_term_params_set = true;
788 t.c_cc[VMIN] = 1; /* satisfy read after 1 char */
790 t.c_iflag &= ~(BRKINT | IGNPAR | PARMRK | INPCK |
791 ISTRIP | ICRNL | IXON | IXOFF | INLCR | IGNCR);
792 t.c_iflag |= IGNBRK | ISIG;
793 // t.c_oflag &= ~(OPOST); /* no output processing */
795 t.c_lflag &= ~(ECHO | ECHOE | ECHOK | ECHONL | ICANON |
797 tcflush(0, TCIFLUSH);
798 if (tcsetattr(0, TCSANOW, &t) == -1) {
799 printf("Cannot tcsetattr()\n");
802 // signal(SIGQUIT, SIG_IGN);
803 // signal(SIGHUP, SIG_IGN);
804 // signal(SIGSTOP, SIG_IGN);
805 signal(SIGINT, sigintcatcher);
806 // signal(SIGWINCH, SIG_IGN);
807 // signal(SIGQUIT, SIG_IGN);
808 // signal(SIGCHLD, SIG_IGN);
809 // signal(SIGTSTP, SIG_IGN);
812 printf("Cannot get terminal type.\n");
815 if (tgetent(term_buffer, termtype) < 0) {
816 printf("Cannot get terminal termcap entry.\n");
819 t_width = t_height = -1;
820 t_width = tgetnum("co") - 1;
821 t_height = tgetnum("li");
824 t_cm = (char *)tgetstr("cm", &term_buffer);
825 t_cs = (char *)tgetstr("cl", &term_buffer); /* clear screen */
826 t_cl = (char *)tgetstr("ce", &term_buffer); /* clear line */
827 t_dl = (char *)tgetstr("dl", &term_buffer); /* delete line */
828 t_il = (char *)tgetstr("al", &term_buffer); /* insert line */
829 t_honk = (char *)tgetstr("bl", &term_buffer); /* beep */
830 t_ti = (char *)tgetstr("ti", &term_buffer);
831 t_te = (char *)tgetstr("te", &term_buffer);
832 t_up = (char *)tgetstr("up", &term_buffer);
833 t_do = (char *)tgetstr("do", &term_buffer);
834 t_sf = (char *)tgetstr("sf", &term_buffer);
836 num_stab = MAX_STAB; /* get default stab size */
837 stab = (stab_t **)malloc(sizeof(stab_t *) * num_stab);
838 memset(stab, 0, sizeof(stab_t *) * num_stab);
841 kl = (char *)tgetstr("kl", &term_buffer);
842 kr = (char *)tgetstr("kr", &term_buffer);
843 ku = (char *)tgetstr("ku", &term_buffer);
844 kd = (char *)tgetstr("kd", &term_buffer);
845 kh = (char *)tgetstr("kh", &term_buffer);
846 kb = (char *)tgetstr("kb", &term_buffer);
847 kD = (char *)tgetstr("kD", &term_buffer);
848 kI = (char *)tgetstr("kI", &term_buffer);
849 kN = (char *)tgetstr("kN", &term_buffer);
850 kP = (char *)tgetstr("kP", &term_buffer);
851 kH = (char *)tgetstr("kH", &term_buffer);
852 kE = (char *)tgetstr("kE", &term_buffer);
854 add_smap(kl, F_CSRLFT);
855 add_smap(kr, F_CSRRGT);
856 add_smap(ku, F_CSRUP);
857 add_smap(kd, F_CSRDWN);
858 add_smap(kI, F_TINS);
859 add_smap(kN, F_PAGDWN);
860 add_smap(kP, F_PAGUP);
861 add_smap(kH, F_HOME);
865 add_esc_smap("[A", F_CSRUP);
866 add_esc_smap("[B", F_CSRDWN);
867 add_esc_smap("[C", F_CSRRGT);
868 add_esc_smap("[D", F_CSRLFT);
869 add_esc_smap("[1~", F_HOME);
870 add_esc_smap("[2~", F_TINS);
871 add_esc_smap("[3~", F_DELCHR);
872 add_esc_smap("[4~", F_EOF);
873 add_esc_smap("f", F_NXTWRD);
874 add_esc_smap("b", F_PRVWRD);
878 for (i=301; i<600; i++) {
879 char_map[i] = i; /* setup IBM function codes */
885 /* Restore tty mode */
886 /*FCN*/static void normode()
888 if (old_term_params_set) {
889 tcsetattr(0, TCSANOW, &old_term_params);
893 /* Get next character from terminal/script file/unget buffer */
899 while ((ch=t_getch()) == 0) ; /* get next input character */
904 /* Get next character from OS */
905 static int t_getch(void)
909 if (read(0, &c, 1) != 1) {
917 /* window_size -- Return window height and width to caller. */
918 static int window_size(int *height, int *width) /* /window_size/ */
920 *width = tgetnum("co") - 1;
921 *height = tgetnum("li");
926 /* Send message to terminal - primitive routine */
928 /*FCN*/t_sendl(char *msg,int len)
934 /*FCN*/t_send(char *msg)
939 t_sendl(msg, strlen(msg)); /* faster than one char at time */
942 /* Send single character to terminal - primitive routine - */
944 /*FCN*/t_char(char c)
950 static int brkflg = 0; /* set on user break */
952 /* Routine to return true if user types break */
958 /* Clear break flag */
965 /* Interrupt caught here */
966 static void sigintcatcher(int sig)
969 signal(SIGINT, sigintcatcher);
974 /*FCN*/void trapctlc()
976 signal(SIGINT, sigintcatcher);
980 /* ASCLRL() -- Clear to end of line from current position */
981 static void asclrl(int pos, int width)
986 t_send(t_cl); /* use clear to eol function */
989 if (pos==1 && linsdel_ok) {
990 t_delete_line(); /* delete line */
991 t_insert_line(); /* reinsert it */
994 for (i=1; i<=width-pos+1; i++)
995 t_char(' '); /* last resort, blank it out */
996 for (i=1; i<=width-pos+1; i++) /* backspace to original position */
1003 /* ASCURS -- Set cursor position */
1004 static void ascurs(int y, int x)
1006 t_send((char *)tgoto(t_cm, x, y));
1010 /* ASCLRS -- Clear whole screen */
1011 static void asclrs()
1019 /* ASINSL -- insert new line after cursor */
1020 static void asinsl()
1022 t_clrline(0, t_width);
1023 t_send(t_il); /* insert before */
1026 /* ASDELL -- Delete line at cursor */
1027 static void asdell()