lib/libedit/term.c

   1 /*      $NetBSD: term.c,v 1.54 2009/08/30 15:41:05 christos Exp $       */
   2
   3 /*-
   4  * Copyright (c) 1992, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Christos Zoulas of Cornell University.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include "config.h"
  36 #if !defined(lint) && !defined(SCCSID)
  37 #if 0
  38 static char sccsid[] = "@(#)term.c      8.2 (Berkeley) 4/30/95";
  39 #else
  40 __RCSID("$NetBSD: term.c,v 1.54 2009/08/30 15:41:05 christos Exp $");
  41 #endif
  42 #endif /* not lint && not SCCSID */
  43
  44 /*
  45  * term.c: Editor/termcap-curses interface
  46  *         We have to declare a static variable here, since the
  47  *         termcap putchar routine does not take an argument!
  48  */
  49 #include <stdio.h>
  50 #include <signal.h>
  51 #include <string.h>
  52 #include <stdlib.h>
  53 #include <unistd.h>
  54 #ifdef HAVE_TERMCAP_H
  55 #include <termcap.h>
  56 #endif
  57 #ifdef HAVE_CURSES_H
  58 #include <curses.h>
  59 #elif HAVE_NCURSES_H
  60 #include <ncurses.h>
  61 #endif
  62 /* Solaris's term.h does horrid things. */
  63
  64 #if defined(HAVE_TERM_H) && !defined(__sun)
  65 #include <term.h>
  66 #endif
  67 #include <sys/types.h>
  68 #include <sys/ioctl.h>
  69
  70 #ifdef _REENTRANT
  71 #include <pthread.h>
  72 #endif
  73
  74 #include "el.h"
  75
  76 /*
  77  * IMPORTANT NOTE: these routines are allowed to look at the current screen
  78  * and the current possition assuming that it is correct.  If this is not
  79  * true, then the update will be WRONG!  This is (should be) a valid
  80  * assumption...
  81  */
  82
  83 #define TC_BUFSIZE      2048
  84
  85 #define GoodStr(a)      (el->el_term.t_str[a] != NULL && \
  86                             el->el_term.t_str[a][0] != '\0')
  87 #define Str(a)          el->el_term.t_str[a]
  88 #define Val(a)          el->el_term.t_val[a]
  89
  90 #ifdef notdef
  91 private const struct {
  92         const char *b_name;
  93         int b_rate;
  94 } baud_rate[] = {
  95 #ifdef B0
  96         { "0", B0 },
  97 #endif
  98 #ifdef B50
  99         { "50", B50 },
 100 #endif
 101 #ifdef B75
 102         { "75", B75 },
 103 #endif
 104 #ifdef B110
 105         { "110", B110 },
 106 #endif
 107 #ifdef B134
 108         { "134", B134 },
 109 #endif
 110 #ifdef B150
 111         { "150", B150 },
 112 #endif
 113 #ifdef B200
 114         { "200", B200 },
 115 #endif
 116 #ifdef B300
 117         { "300", B300 },
 118 #endif
 119 #ifdef B600
 120         { "600", B600 },
 121 #endif
 122 #ifdef B900
 123         { "900", B900 },
 124 #endif
 125 #ifdef B1200
 126         { "1200", B1200 },
 127 #endif
 128 #ifdef B1800
 129         { "1800", B1800 },
 130 #endif
 131 #ifdef B2400
 132         { "2400", B2400 },
 133 #endif
 134 #ifdef B3600
 135         { "3600", B3600 },
 136 #endif
 137 #ifdef B4800
 138         { "4800", B4800 },
 139 #endif
 140 #ifdef B7200
 141         { "7200", B7200 },
 142 #endif
 143 #ifdef B9600
 144         { "9600", B9600 },
 145 #endif
 146 #ifdef EXTA
 147         { "19200", EXTA },
 148 #endif
 149 #ifdef B19200
 150         { "19200", B19200 },
 151 #endif
 152 #ifdef EXTB
 153         { "38400", EXTB },
 154 #endif
 155 #ifdef B38400
 156         { "38400", B38400 },
 157 #endif
 158         { NULL, 0 }
 159 };
 160 #endif
 161
 162 private const struct termcapstr {
 163         const char *name;
 164         const char *long_name;
 165 } tstr[] = {
 166 #define T_al    0
 167         { "al", "add new blank line" },
 168 #define T_bl    1
 169         { "bl", "audible bell" },
 170 #define T_cd    2
 171         { "cd", "clear to bottom" },
 172 #define T_ce    3
 173         { "ce", "clear to end of line" },
 174 #define T_ch    4
 175         { "ch", "cursor to horiz pos" },
 176 #define T_cl    5
 177         { "cl", "clear screen" },
 178 #define T_dc    6
 179         { "dc", "delete a character" },
 180 #define T_dl    7
 181         { "dl", "delete a line" },
 182 #define T_dm    8
 183         { "dm", "start delete mode" },
 184 #define T_ed    9
 185         { "ed", "end delete mode" },
 186 #define T_ei    10
 187         { "ei", "end insert mode" },
 188 #define T_fs    11
 189         { "fs", "cursor from status line" },
 190 #define T_ho    12
 191         { "ho", "home cursor" },
 192 #define T_ic    13
 193         { "ic", "insert character" },
 194 #define T_im    14
 195         { "im", "start insert mode" },
 196 #define T_ip    15
 197         { "ip", "insert padding" },
 198 #define T_kd    16
 199         { "kd", "sends cursor down" },
 200 #define T_kl    17
 201         { "kl", "sends cursor left" },
 202 #define T_kr    18
 203         { "kr", "sends cursor right" },
 204 #define T_ku    19
 205         { "ku", "sends cursor up" },
 206 #define T_md    20
 207         { "md", "begin bold" },
 208 #define T_me    21
 209         { "me", "end attributes" },
 210 #define T_nd    22
 211         { "nd", "non destructive space" },
 212 #define T_se    23
 213         { "se", "end standout" },
 214 #define T_so    24
 215         { "so", "begin standout" },
 216 #define T_ts    25
 217         { "ts", "cursor to status line" },
 218 #define T_up    26
 219         { "up", "cursor up one" },
 220 #define T_us    27
 221         { "us", "begin underline" },
 222 #define T_ue    28
 223         { "ue", "end underline" },
 224 #define T_vb    29
 225         { "vb", "visible bell" },
 226 #define T_DC    30
 227         { "DC", "delete multiple chars" },
 228 #define T_DO    31
 229         { "DO", "cursor down multiple" },
 230 #define T_IC    32
 231         { "IC", "insert multiple chars" },
 232 #define T_LE    33
 233         { "LE", "cursor left multiple" },
 234 #define T_RI    34
 235         { "RI", "cursor right multiple" },
 236 #define T_UP    35
 237         { "UP", "cursor up multiple" },
 238 #define T_kh    36
 239         { "kh", "send cursor home" },
 240 #define T_at7   37
 241         { "@7", "send cursor end" },
 242 #define T_str   38
 243         { NULL, NULL }
 244 };
 245
 246 private const struct termcapval {
 247         const char *name;
 248         const char *long_name;
 249 } tval[] = {
 250 #define T_am    0
 251         { "am", "has automatic margins" },
 252 #define T_pt    1
 253         { "pt", "has physical tabs" },
 254 #define T_li    2
 255         { "li", "Number of lines" },
 256 #define T_co    3
 257         { "co", "Number of columns" },
 258 #define T_km    4
 259         { "km", "Has meta key" },
 260 #define T_xt    5
 261         { "xt", "Tab chars destructive" },
 262 #define T_xn    6
 263         { "xn", "newline ignored at right margin" },
 264 #define T_MT    7
 265         { "MT", "Has meta key" },                       /* XXX? */
 266 #define T_val   8
 267         { NULL, NULL, }
 268 };
 269 /* do two or more of the attributes use me */
 270
 271 private void    term_setflags(EditLine *);
 272 private int     term_rebuffer_display(EditLine *);
 273 private void    term_free_display(EditLine *);
 274 private int     term_alloc_display(EditLine *);
 275 private void    term_alloc(EditLine *, const struct termcapstr *, const char *);
 276 private void    term_init_arrow(EditLine *);
 277 private void    term_reset_arrow(EditLine *);
 278 private int     term_putc(int);
 279 private void    term_tputs(EditLine *, const char *, int);
 280
 281 #ifdef _REENTRANT
 282 private pthread_mutex_t term_mutex = PTHREAD_MUTEX_INITIALIZER;
 283 #endif
 284 private FILE *term_outfile = NULL;
 285
 286
 287 /* term_setflags():
 288  *      Set the terminal capability flags
 289  */
 290 private void
 291 term_setflags(EditLine *el)
 292 {
 293         EL_FLAGS = 0;
 294         if (el->el_tty.t_tabs)
 295                 EL_FLAGS |= (Val(T_pt) && !Val(T_xt)) ? TERM_CAN_TAB : 0;
 296
 297         EL_FLAGS |= (Val(T_km) || Val(T_MT)) ? TERM_HAS_META : 0;
 298         EL_FLAGS |= GoodStr(T_ce) ? TERM_CAN_CEOL : 0;
 299         EL_FLAGS |= (GoodStr(T_dc) || GoodStr(T_DC)) ? TERM_CAN_DELETE : 0;
 300         EL_FLAGS |= (GoodStr(T_im) || GoodStr(T_ic) || GoodStr(T_IC)) ?
 301             TERM_CAN_INSERT : 0;
 302         EL_FLAGS |= (GoodStr(T_up) || GoodStr(T_UP)) ? TERM_CAN_UP : 0;
 303         EL_FLAGS |= Val(T_am) ? TERM_HAS_AUTO_MARGINS : 0;
 304         EL_FLAGS |= Val(T_xn) ? TERM_HAS_MAGIC_MARGINS : 0;
 305
 306         if (GoodStr(T_me) && GoodStr(T_ue))
 307                 EL_FLAGS |= (strcmp(Str(T_me), Str(T_ue)) == 0) ?
 308                     TERM_CAN_ME : 0;
 309         else
 310                 EL_FLAGS &= ~TERM_CAN_ME;
 311         if (GoodStr(T_me) && GoodStr(T_se))
 312                 EL_FLAGS |= (strcmp(Str(T_me), Str(T_se)) == 0) ?
 313                     TERM_CAN_ME : 0;
 314
 315
 316 #ifdef DEBUG_SCREEN
 317         if (!EL_CAN_UP) {
 318                 (void) fprintf(el->el_errfile,
 319                     "WARNING: Your terminal cannot move up.\n");
 320                 (void) fprintf(el->el_errfile,
 321                     "Editing may be odd for long lines.\n");
 322         }
 323         if (!EL_CAN_CEOL)
 324                 (void) fprintf(el->el_errfile, "no clear EOL capability.\n");
 325         if (!EL_CAN_DELETE)
 326                 (void) fprintf(el->el_errfile, "no delete char capability.\n");
 327         if (!EL_CAN_INSERT)
 328                 (void) fprintf(el->el_errfile, "no insert char capability.\n");
 329 #endif /* DEBUG_SCREEN */
 330 }
 331
 332 /* term_init():
 333  *      Initialize the terminal stuff
 334  */
 335 protected int
 336 term_init(EditLine *el)
 337 {
 338
 339         el->el_term.t_buf = (char *) el_malloc(TC_BUFSIZE);
 340         if (el->el_term.t_buf == NULL)
 341                 return (-1);
 342         el->el_term.t_cap = (char *) el_malloc(TC_BUFSIZE);
 343         if (el->el_term.t_cap == NULL)
 344                 return (-1);
 345         el->el_term.t_fkey = (fkey_t *) el_malloc(A_K_NKEYS * sizeof(fkey_t));
 346         if (el->el_term.t_fkey == NULL)
 347                 return (-1);
 348         el->el_term.t_loc = 0;
 349         el->el_term.t_str = (char **) el_malloc(T_str * sizeof(char *));
 350         if (el->el_term.t_str == NULL)
 351                 return (-1);
 352         (void) memset(el->el_term.t_str, 0, T_str * sizeof(char *));
 353         el->el_term.t_val = (int *) el_malloc(T_val * sizeof(int));
 354         if (el->el_term.t_val == NULL)
 355                 return (-1);
 356         (void) memset(el->el_term.t_val, 0, T_val * sizeof(int));
 357         (void) term_set(el, NULL);
 358         term_init_arrow(el);
 359         return (0);
 360 }
 361
 362 /* term_end():
 363  *      Clean up the terminal stuff
 364  */
 365 protected void
 366 term_end(EditLine *el)
 367 {
 368
 369         el_free((ptr_t) el->el_term.t_buf);
 370         el->el_term.t_buf = NULL;
 371         el_free((ptr_t) el->el_term.t_cap);
 372         el->el_term.t_cap = NULL;
 373         el->el_term.t_loc = 0;
 374         el_free((ptr_t) el->el_term.t_str);
 375         el->el_term.t_str = NULL;
 376         el_free((ptr_t) el->el_term.t_val);
 377         el->el_term.t_val = NULL;
 378         el_free((ptr_t) el->el_term.t_fkey);
 379         el->el_term.t_fkey = NULL;
 380         term_free_display(el);
 381 }
 382
 383
 384 /* term_alloc():
 385  *      Maintain a string pool for termcap strings
 386  */
 387 private void
 388 term_alloc(EditLine *el, const struct termcapstr *t, const char *cap)
 389 {
 390         char termbuf[TC_BUFSIZE];
 391         size_t tlen, clen;
 392         char **tlist = el->el_term.t_str;
 393         char **tmp, **str = &tlist[t - tstr];
 394
 395         if (cap == NULL || *cap == '\0') {
 396                 *str = NULL;
 397                 return;
 398         } else
 399                 clen = strlen(cap);
 400
 401         tlen = *str == NULL ? 0 : strlen(*str);
 402
 403         /*
 404          * New string is shorter; no need to allocate space
 405          */
 406         if (clen <= tlen) {
 407                 if (*str)
 408                         (void) strcpy(*str, cap);       /* XXX strcpy is safe */
 409                 return;
 410         }
 411         /*
 412          * New string is longer; see if we have enough space to append
 413          */
 414         if (el->el_term.t_loc + 3 < TC_BUFSIZE) {
 415                                                 /* XXX strcpy is safe */
 416                 (void) strcpy(*str = &el->el_term.t_buf[el->el_term.t_loc],
 417                     cap);
 418                 el->el_term.t_loc += (int)clen + 1;     /* one for \0 */
 419                 return;
 420         }
 421         /*
 422          * Compact our buffer; no need to check compaction, cause we know it
 423          * fits...
 424          */
 425         tlen = 0;
 426         for (tmp = tlist; tmp < &tlist[T_str]; tmp++)
 427                 if (*tmp != NULL && *tmp != '\0' && *tmp != *str) {
 428                         char *ptr;
 429
 430                         for (ptr = *tmp; *ptr != '\0'; termbuf[tlen++] = *ptr++)
 431                                 continue;
 432                         termbuf[tlen++] = '\0';
 433                 }
 434         memcpy(el->el_term.t_buf, termbuf, TC_BUFSIZE);
 435         el->el_term.t_loc = (int)tlen;
 436         if (el->el_term.t_loc + 3 >= TC_BUFSIZE) {
 437                 (void) fprintf(el->el_errfile,
 438                     "Out of termcap string space.\n");
 439                 return;
 440         }
 441                                         /* XXX strcpy is safe */
 442         (void) strcpy(*str = &el->el_term.t_buf[el->el_term.t_loc], cap);
 443         el->el_term.t_loc += (int)clen + 1;     /* one for \0 */
 444         return;
 445 }
 446
 447
 448 /* term_rebuffer_display():
 449  *      Rebuffer the display after the screen changed size
 450  */
 451 private int
 452 term_rebuffer_display(EditLine *el)
 453 {
 454         coord_t *c = &el->el_term.t_size;
 455
 456         term_free_display(el);
 457
 458         c->h = Val(T_co);
 459         c->v = Val(T_li);
 460
 461         if (term_alloc_display(el) == -1)
 462                 return (-1);
 463         return (0);
 464 }
 465
 466
 467 /* term_alloc_display():
 468  *      Allocate a new display.
 469  */
 470 private int
 471 term_alloc_display(EditLine *el)
 472 {
 473         int i;
 474         char **b;
 475         coord_t *c = &el->el_term.t_size;
 476
 477         b = (char **) el_malloc((size_t) (sizeof(char *) * (c->v + 1)));
 478         if (b == NULL)
 479                 return (-1);
 480         for (i = 0; i < c->v; i++) {
 481                 b[i] = (char *) el_malloc((size_t) (sizeof(char) * (c->h + 1)));
 482                 if (b[i] == NULL) {
 483                         while (--i >= 0)
 484                                 el_free((ptr_t) b[i]);
 485                         el_free((ptr_t) b);
 486                         return (-1);
 487                 }
 488         }
 489         b[c->v] = NULL;
 490         el->el_display = b;
 491
 492         b = (char **) el_malloc((size_t) (sizeof(char *) * (c->v + 1)));
 493         if (b == NULL)
 494                 return (-1);
 495         for (i = 0; i < c->v; i++) {
 496                 b[i] = (char *) el_malloc((size_t) (sizeof(char) * (c->h + 1)));
 497                 if (b[i] == NULL) {
 498                         while (--i >= 0)
 499                                 el_free((ptr_t) b[i]);
 500                         el_free((ptr_t) b);
 501                         return (-1);
 502                 }
 503         }
 504         b[c->v] = NULL;
 505         el->el_vdisplay = b;
 506         return (0);
 507 }
 508
 509
 510 /* term_free_display():
 511  *      Free the display buffers
 512  */
 513 private void
 514 term_free_display(EditLine *el)
 515 {
 516         char **b;
 517         char **bufp;
 518
 519         b = el->el_display;
 520         el->el_display = NULL;
 521         if (b != NULL) {
 522                 for (bufp = b; *bufp != NULL; bufp++)
 523                         el_free((ptr_t) * bufp);
 524                 el_free((ptr_t) b);
 525         }
 526         b = el->el_vdisplay;
 527         el->el_vdisplay = NULL;
 528         if (b != NULL) {
 529                 for (bufp = b; *bufp != NULL; bufp++)
 530                         el_free((ptr_t) * bufp);
 531                 el_free((ptr_t) b);
 532         }
 533 }
 534
 535
 536 /* term_move_to_line():
 537  *      move to line <where> (first line == 0)
 538  *      as efficiently as possible
 539  */
 540 protected void
 541 term_move_to_line(EditLine *el, int where)
 542 {
 543         int del;
 544
 545         if (where == el->el_cursor.v)
 546                 return;
 547
 548         if (where > el->el_term.t_size.v) {
 549 #ifdef DEBUG_SCREEN
 550                 (void) fprintf(el->el_errfile,
 551                     "term_move_to_line: where is ridiculous: %d\r\n", where);
 552 #endif /* DEBUG_SCREEN */
 553                 return;
 554         }
 555         if ((del = where - el->el_cursor.v) > 0) {
 556                 while (del > 0) {
 557                         if (EL_HAS_AUTO_MARGINS &&
 558                             el->el_display[el->el_cursor.v][0] != '\0') {
 559                                 /* move without newline */
 560                                 term_move_to_char(el, el->el_term.t_size.h - 1);
 561                                 term_overwrite(el, &el->el_display
 562                                     [el->el_cursor.v][el->el_cursor.h],
 563                                     (size_t)(el->el_term.t_size.h -
 564                                     el->el_cursor.h));
 565                                 /* updates Cursor */
 566                                 del--;
 567                         } else {
 568                                 if ((del > 1) && GoodStr(T_DO)) {
 569                                         term_tputs(el, tgoto(Str(T_DO), del,
 570                                             del), del);
 571                                         del = 0;
 572                                 } else {
 573                                         for (; del > 0; del--)
 574                                                 term__putc(el, '\n');
 575                                         /* because the \n will become \r\n */
 576                                         el->el_cursor.h = 0;
 577                                 }
 578                         }
 579                 }
 580         } else {                /* del < 0 */
 581                 if (GoodStr(T_UP) && (-del > 1 || !GoodStr(T_up)))
 582                         term_tputs(el, tgoto(Str(T_UP), -del, -del), -del);
 583                 else {
 584                         if (GoodStr(T_up))
 585                                 for (; del < 0; del++)
 586                                         term_tputs(el, Str(T_up), 1);
 587                 }
 588         }
 589         el->el_cursor.v = where;/* now where is here */
 590 }
 591
 592
 593 /* term_move_to_char():
 594  *      Move to the character position specified
 595  */
 596 protected void
 597 term_move_to_char(EditLine *el, int where)
 598 {
 599         int del, i;
 600
 601 mc_again:
 602         if (where == el->el_cursor.h)
 603                 return;
 604
 605         if (where > el->el_term.t_size.h) {
 606 #ifdef DEBUG_SCREEN
 607                 (void) fprintf(el->el_errfile,
 608                     "term_move_to_char: where is riduculous: %d\r\n", where);
 609 #endif /* DEBUG_SCREEN */
 610                 return;
 611         }
 612         if (!where) {           /* if where is first column */
 613                 term__putc(el, '\r');   /* do a CR */
 614                 el->el_cursor.h = 0;
 615                 return;
 616         }
 617         del = where - el->el_cursor.h;
 618
 619         if ((del < -4 || del > 4) && GoodStr(T_ch))
 620                 /* go there directly */
 621                 term_tputs(el, tgoto(Str(T_ch), where, where), where);
 622         else {
 623                 if (del > 0) {  /* moving forward */
 624                         if ((del > 4) && GoodStr(T_RI))
 625                                 term_tputs(el, tgoto(Str(T_RI), del, del), del);
 626                         else {
 627                                         /* if I can do tabs, use them */
 628                                 if (EL_CAN_TAB) {
 629                                         if ((el->el_cursor.h & 0370) !=
 630                                             (where & 0370)) {
 631                                                 /* if not within tab stop */
 632                                                 for (i =
 633                                                     (el->el_cursor.h & 0370);
 634                                                     i < (where & 0370);
 635                                                     i += 8)
 636                                                         term__putc(el, '\t');
 637                                                         /* then tab over */
 638                                                 el->el_cursor.h = where & 0370;
 639                                         }
 640                                 }
 641                                 /*
 642                                  * it's usually cheaper to just write the
 643                                  * chars, so we do.
 644                                  */
 645                                 /*
 646                                  * NOTE THAT term_overwrite() WILL CHANGE
 647                                  * el->el_cursor.h!!!
 648                                  */
 649                                 term_overwrite(el,
 650                                     &el->el_display[el->el_cursor.v][el->el_cursor.h],
 651                                     (size_t)(where - el->el_cursor.h));
 652
 653                         }
 654                 } else {        /* del < 0 := moving backward */
 655                         if ((-del > 4) && GoodStr(T_LE))
 656                                 term_tputs(el, tgoto(Str(T_LE), -del, -del),
 657                                     -del);
 658                         else {  /* can't go directly there */
 659                                 /*
 660                                  * if the "cost" is greater than the "cost"
 661                                  * from col 0
 662                                  */
 663                                 if (EL_CAN_TAB ?
 664                                     ((unsigned int)-del >
 665                                     (((unsigned int) where >> 3) +
 666                                      (where & 07)))
 667                                     : (-del > where)) {
 668                                         term__putc(el, '\r');   /* do a CR */
 669                                         el->el_cursor.h = 0;
 670                                         goto mc_again;  /* and try again */
 671                                 }
 672                                 for (i = 0; i < -del; i++)
 673                                         term__putc(el, '\b');
 674                         }
 675                 }
 676         }
 677         el->el_cursor.h = where;                /* now where is here */
 678 }
 679
 680
 681 /* term_overwrite():
 682  *      Overstrike num characters
 683  */
 684 protected void
 685 term_overwrite(EditLine *el, const char *cp, size_t n)
 686 {
 687         if (n == 0)
 688                 return;
 689
 690         if (n > (size_t)el->el_term.t_size.h) {
 691 #ifdef DEBUG_SCREEN
 692                 (void) fprintf(el->el_errfile,
 693                     "term_overwrite: n is riduculous: %d\r\n", n);
 694 #endif /* DEBUG_SCREEN */
 695                 return;
 696         }
 697
 698         do {
 699                 term__putc(el, *cp++);
 700                 el->el_cursor.h++;
 701         } while (--n);
 702
 703         if (el->el_cursor.h >= el->el_term.t_size.h) {  /* wrap? */
 704                 if (EL_HAS_AUTO_MARGINS) {      /* yes */
 705                         el->el_cursor.h = 0;
 706                         el->el_cursor.v++;
 707                         if (EL_HAS_MAGIC_MARGINS) {
 708                                 /* force the wrap to avoid the "magic"
 709                                  * situation */
 710                                 char c;
 711                                 if ((c = el->el_display[el->el_cursor.v][el->el_cursor.h])
 712                                     != '\0')
 713                                         term_overwrite(el, &c, 1);
 714                                 else
 715                                         term__putc(el, ' ');
 716                                 el->el_cursor.h = 1;
 717                         }
 718                 } else          /* no wrap, but cursor stays on screen */
 719                         el->el_cursor.h = el->el_term.t_size.h - 1;
 720         }
 721 }
 722
 723
 724 /* term_deletechars():
 725  *      Delete num characters
 726  */
 727 protected void
 728 term_deletechars(EditLine *el, int num)
 729 {
 730         if (num <= 0)
 731                 return;
 732
 733         if (!EL_CAN_DELETE) {
 734 #ifdef DEBUG_EDIT
 735                 (void) fprintf(el->el_errfile, "   ERROR: cannot delete   \n");
 736 #endif /* DEBUG_EDIT */
 737                 return;
 738         }
 739         if (num > el->el_term.t_size.h) {
 740 #ifdef DEBUG_SCREEN
 741                 (void) fprintf(el->el_errfile,
 742                     "term_deletechars: num is riduculous: %d\r\n", num);
 743 #endif /* DEBUG_SCREEN */
 744                 return;
 745         }
 746         if (GoodStr(T_DC))      /* if I have multiple delete */
 747                 if ((num > 1) || !GoodStr(T_dc)) {      /* if dc would be more
 748                                                          * expen. */
 749                         term_tputs(el, tgoto(Str(T_DC), num, num), num);
 750                         return;
 751                 }
 752         if (GoodStr(T_dm))      /* if I have delete mode */
 753                 term_tputs(el, Str(T_dm), 1);
 754
 755         if (GoodStr(T_dc))      /* else do one at a time */
 756                 while (num--)
 757                         term_tputs(el, Str(T_dc), 1);
 758
 759         if (GoodStr(T_ed))      /* if I have delete mode */
 760                 term_tputs(el, Str(T_ed), 1);
 761 }
 762
 763
 764 /* term_insertwrite():
 765  *      Puts terminal in insert character mode or inserts num
 766  *      characters in the line
 767  */
 768 protected void
 769 term_insertwrite(EditLine *el, char *cp, int num)
 770 {
 771         if (num <= 0)
 772                 return;
 773         if (!EL_CAN_INSERT) {
 774 #ifdef DEBUG_EDIT
 775                 (void) fprintf(el->el_errfile, "   ERROR: cannot insert   \n");
 776 #endif /* DEBUG_EDIT */
 777                 return;
 778         }
 779         if (num > el->el_term.t_size.h) {
 780 #ifdef DEBUG_SCREEN
 781                 (void) fprintf(el->el_errfile,
 782                     "StartInsert: num is riduculous: %d\r\n", num);
 783 #endif /* DEBUG_SCREEN */
 784                 return;
 785         }
 786         if (GoodStr(T_IC))      /* if I have multiple insert */
 787                 if ((num > 1) || !GoodStr(T_ic)) {
 788                                 /* if ic would be more expensive */
 789                         term_tputs(el, tgoto(Str(T_IC), num, num), num);
 790                         term_overwrite(el, cp, (size_t)num);
 791                                 /* this updates el_cursor.h */
 792                         return;
 793                 }
 794         if (GoodStr(T_im) && GoodStr(T_ei)) {   /* if I have insert mode */
 795                 term_tputs(el, Str(T_im), 1);
 796
 797                 el->el_cursor.h += num;
 798                 do
 799                         term__putc(el, *cp++);
 800                 while (--num);
 801
 802                 if (GoodStr(T_ip))      /* have to make num chars insert */
 803                         term_tputs(el, Str(T_ip), 1);
 804
 805                 term_tputs(el, Str(T_ei), 1);
 806                 return;
 807         }
 808         do {
 809                 if (GoodStr(T_ic))      /* have to make num chars insert */
 810                         term_tputs(el, Str(T_ic), 1);
 811
 812                 term__putc(el, *cp++);
 813
 814                 el->el_cursor.h++;
 815
 816                 if (GoodStr(T_ip))      /* have to make num chars insert */
 817                         term_tputs(el, Str(T_ip), 1);
 818                                         /* pad the inserted char */
 819
 820         } while (--num);
 821 }
 822
 823
 824 /* term_clear_EOL():
 825  *      clear to end of line.  There are num characters to clear
 826  */
 827 protected void
 828 term_clear_EOL(EditLine *el, int num)
 829 {
 830         int i;
 831
 832         if (EL_CAN_CEOL && GoodStr(T_ce))
 833                 term_tputs(el, Str(T_ce), 1);
 834         else {
 835                 for (i = 0; i < num; i++)
 836                         term__putc(el, ' ');
 837                 el->el_cursor.h += num; /* have written num spaces */
 838         }
 839 }
 840
 841
 842 /* term_clear_screen():
 843  *      Clear the screen
 844  */
 845 protected void
 846 term_clear_screen(EditLine *el)
 847 {                               /* clear the whole screen and home */
 848
 849         if (GoodStr(T_cl))
 850                 /* send the clear screen code */
 851                 term_tputs(el, Str(T_cl), Val(T_li));
 852         else if (GoodStr(T_ho) && GoodStr(T_cd)) {
 853                 term_tputs(el, Str(T_ho), Val(T_li));   /* home */
 854                 /* clear to bottom of screen */
 855                 term_tputs(el, Str(T_cd), Val(T_li));
 856         } else {
 857                 term__putc(el, '\r');
 858                 term__putc(el, '\n');
 859         }
 860 }
 861
 862
 863 /* term_beep():
 864  *      Beep the way the terminal wants us
 865  */
 866 protected void
 867 term_beep(EditLine *el)
 868 {
 869         if (GoodStr(T_bl))
 870                 /* what termcap says we should use */
 871                 term_tputs(el, Str(T_bl), 1);
 872         else
 873                 term__putc(el, '\007'); /* an ASCII bell; ^G */
 874 }
 875
 876
 877 #ifdef notdef
 878 /* term_clear_to_bottom():
 879  *      Clear to the bottom of the screen
 880  */
 881 protected void
 882 term_clear_to_bottom(EditLine *el)
 883 {
 884         if (GoodStr(T_cd))
 885                 term_tputs(el, Str(T_cd), Val(T_li));
 886         else if (GoodStr(T_ce))
 887                 term_tputs(el, Str(T_ce), Val(T_li));
 888 }
 889 #endif
 890
 891 protected void
 892 term_get(EditLine *el, const char **term)
 893 {
 894         *term = el->el_term.t_name;
 895 }
 896
 897
 898 /* term_set():
 899  *      Read in the terminal capabilities from the requested terminal
 900  */
 901 protected int
 902 term_set(EditLine *el, const char *term)
 903 {
 904         int i;
 905         char buf[TC_BUFSIZE];
 906         char *area;
 907         const struct termcapstr *t;
 908         sigset_t oset, nset;
 909         int lins, cols;
 910
 911         (void) sigemptyset(&nset);
 912         (void) sigaddset(&nset, SIGWINCH);
 913         (void) sigprocmask(SIG_BLOCK, &nset, &oset);
 914
 915         area = buf;
 916
 917
 918         if (term == NULL)
 919                 term = getenv("TERM");
 920
 921         if (!term || !term[0])
 922                 term = "dumb";
 923
 924         if (strcmp(term, "emacs") == 0)
 925                 el->el_flags |= EDIT_DISABLED;
 926
 927         memset(el->el_term.t_cap, 0, TC_BUFSIZE);
 928
 929         i = tgetent(el->el_term.t_cap, term);
 930
 931         if (i <= 0) {
 932                 if (i == -1)
 933                         (void) fprintf(el->el_errfile,
 934                             "Cannot read termcap database;\n");
 935                 else if (i == 0)
 936                         (void) fprintf(el->el_errfile,
 937                             "No entry for terminal type \"%s\";\n", term);
 938                 (void) fprintf(el->el_errfile,
 939                     "using dumb terminal settings.\n");
 940                 Val(T_co) = 80; /* do a dumb terminal */
 941                 Val(T_pt) = Val(T_km) = Val(T_li) = 0;
 942                 Val(T_xt) = Val(T_MT);
 943                 for (t = tstr; t->name != NULL; t++)
 944                         term_alloc(el, t, NULL);
 945         } else {
 946                 /* auto/magic margins */
 947                 Val(T_am) = tgetflag("am");
 948                 Val(T_xn) = tgetflag("xn");
 949                 /* Can we tab */
 950                 Val(T_pt) = tgetflag("pt");
 951                 Val(T_xt) = tgetflag("xt");
 952                 /* do we have a meta? */
 953                 Val(T_km) = tgetflag("km");
 954                 Val(T_MT) = tgetflag("MT");
 955                 /* Get the size */
 956                 Val(T_co) = tgetnum("co");
 957                 Val(T_li) = tgetnum("li");
 958                 for (t = tstr; t->name != NULL; t++) {
 959                         /* XXX: some systems' tgetstr needs non const */
 960                         term_alloc(el, t, tgetstr(strchr(t->name, *t->name),
 961                             &area));
 962                 }
 963         }
 964
 965         if (Val(T_co) < 2)
 966                 Val(T_co) = 80; /* just in case */
 967         if (Val(T_li) < 1)
 968                 Val(T_li) = 24;
 969
 970         el->el_term.t_size.v = Val(T_co);
 971         el->el_term.t_size.h = Val(T_li);
 972
 973         term_setflags(el);
 974
 975                                 /* get the correct window size */
 976         (void) term_get_size(el, &lins, &cols);
 977         if (term_change_size(el, lins, cols) == -1)
 978                 return (-1);
 979         (void) sigprocmask(SIG_SETMASK, &oset, NULL);
 980         term_bind_arrow(el);
 981         el->el_term.t_name = term;
 982         return (i <= 0 ? -1 : 0);
 983 }
 984
 985
 986 /* term_get_size():
 987  *      Return the new window size in lines and cols, and
 988  *      true if the size was changed.
 989  */
 990 protected int
 991 term_get_size(EditLine *el, int *lins, int *cols)
 992 {
 993
 994         *cols = Val(T_co);
 995         *lins = Val(T_li);
 996
 997 #ifdef TIOCGWINSZ
 998         {
 999                 struct winsize ws;
1000                 if (ioctl(el->el_infd, TIOCGWINSZ, (ioctl_t) & ws) != -1) {
1001                         if (ws.ws_col)
1002                                 *cols = ws.ws_col;
1003                         if (ws.ws_row)
1004                                 *lins = ws.ws_row;
1005                 }
1006         }
1007 #endif
1008 #ifdef TIOCGSIZE
1009         {
1010                 struct ttysize ts;
1011                 if (ioctl(el->el_infd, TIOCGSIZE, (ioctl_t) & ts) != -1) {
1012                         if (ts.ts_cols)
1013                                 *cols = ts.ts_cols;
1014                         if (ts.ts_lines)
1015                                 *lins = ts.ts_lines;
1016                 }
1017         }
1018 #endif
1019         return (Val(T_co) != *cols || Val(T_li) != *lins);
1020 }
1021
1022
1023 /* term_change_size():
1024  *      Change the size of the terminal
1025  */
1026 protected int
1027 term_change_size(EditLine *el, int lins, int cols)
1028 {
1029         /*
1030          * Just in case
1031          */
1032         Val(T_co) = (cols < 2) ? 80 : cols;
1033         Val(T_li) = (lins < 1) ? 24 : lins;
1034
1035         /* re-make display buffers */
1036         if (term_rebuffer_display(el) == -1)
1037                 return (-1);
1038         re_clear_display(el);
1039         return (0);
1040 }
1041
1042
1043 /* term_init_arrow():
1044  *      Initialize the arrow key bindings from termcap
1045  */
1046 private void
1047 term_init_arrow(EditLine *el)
1048 {
1049         fkey_t *arrow = el->el_term.t_fkey;
1050
1051         arrow[A_K_DN].name = "down";
1052         arrow[A_K_DN].key = T_kd;
1053         arrow[A_K_DN].fun.cmd = ED_NEXT_HISTORY;
1054         arrow[A_K_DN].type = XK_CMD;
1055
1056         arrow[A_K_UP].name = "up";
1057         arrow[A_K_UP].key = T_ku;
1058         arrow[A_K_UP].fun.cmd = ED_PREV_HISTORY;
1059         arrow[A_K_UP].type = XK_CMD;
1060
1061         arrow[A_K_LT].name = "left";
1062         arrow[A_K_LT].key = T_kl;
1063         arrow[A_K_LT].fun.cmd = ED_PREV_CHAR;
1064         arrow[A_K_LT].type = XK_CMD;
1065
1066         arrow[A_K_RT].name = "right";
1067         arrow[A_K_RT].key = T_kr;
1068         arrow[A_K_RT].fun.cmd = ED_NEXT_CHAR;
1069         arrow[A_K_RT].type = XK_CMD;
1070
1071         arrow[A_K_HO].name = "home";
1072         arrow[A_K_HO].key = T_kh;
1073         arrow[A_K_HO].fun.cmd = ED_MOVE_TO_BEG;
1074         arrow[A_K_HO].type = XK_CMD;
1075
1076         arrow[A_K_EN].name = "end";
1077         arrow[A_K_EN].key = T_at7;
1078         arrow[A_K_EN].fun.cmd = ED_MOVE_TO_END;
1079         arrow[A_K_EN].type = XK_CMD;
1080 }
1081
1082
1083 /* term_reset_arrow():
1084  *      Reset arrow key bindings
1085  */
1086 private void
1087 term_reset_arrow(EditLine *el)
1088 {
1089         fkey_t *arrow = el->el_term.t_fkey;
1090         static const char strA[] = {033, '[', 'A', '\0'};
1091         static const char strB[] = {033, '[', 'B', '\0'};
1092         static const char strC[] = {033, '[', 'C', '\0'};
1093         static const char strD[] = {033, '[', 'D', '\0'};
1094         static const char strH[] = {033, '[', 'H', '\0'};
1095         static const char strF[] = {033, '[', 'F', '\0'};
1096         static const char stOA[] = {033, 'O', 'A', '\0'};
1097         static const char stOB[] = {033, 'O', 'B', '\0'};
1098         static const char stOC[] = {033, 'O', 'C', '\0'};
1099         static const char stOD[] = {033, 'O', 'D', '\0'};
1100         static const char stOH[] = {033, 'O', 'H', '\0'};
1101         static const char stOF[] = {033, 'O', 'F', '\0'};
1102
1103         key_add(el, strA, &arrow[A_K_UP].fun, arrow[A_K_UP].type);
1104         key_add(el, strB, &arrow[A_K_DN].fun, arrow[A_K_DN].type);
1105         key_add(el, strC, &arrow[A_K_RT].fun, arrow[A_K_RT].type);
1106         key_add(el, strD, &arrow[A_K_LT].fun, arrow[A_K_LT].type);
1107         key_add(el, strH, &arrow[A_K_HO].fun, arrow[A_K_HO].type);
1108         key_add(el, strF, &arrow[A_K_EN].fun, arrow[A_K_EN].type);
1109         key_add(el, stOA, &arrow[A_K_UP].fun, arrow[A_K_UP].type);
1110         key_add(el, stOB, &arrow[A_K_DN].fun, arrow[A_K_DN].type);
1111         key_add(el, stOC, &arrow[A_K_RT].fun, arrow[A_K_RT].type);
1112         key_add(el, stOD, &arrow[A_K_LT].fun, arrow[A_K_LT].type);
1113         key_add(el, stOH, &arrow[A_K_HO].fun, arrow[A_K_HO].type);
1114         key_add(el, stOF, &arrow[A_K_EN].fun, arrow[A_K_EN].type);
1115
1116         if (el->el_map.type == MAP_VI) {
1117                 key_add(el, &strA[1], &arrow[A_K_UP].fun, arrow[A_K_UP].type);
1118                 key_add(el, &strB[1], &arrow[A_K_DN].fun, arrow[A_K_DN].type);
1119                 key_add(el, &strC[1], &arrow[A_K_RT].fun, arrow[A_K_RT].type);
1120                 key_add(el, &strD[1], &arrow[A_K_LT].fun, arrow[A_K_LT].type);
1121                 key_add(el, &strH[1], &arrow[A_K_HO].fun, arrow[A_K_HO].type);
1122                 key_add(el, &strF[1], &arrow[A_K_EN].fun, arrow[A_K_EN].type);
1123                 key_add(el, &stOA[1], &arrow[A_K_UP].fun, arrow[A_K_UP].type);
1124                 key_add(el, &stOB[1], &arrow[A_K_DN].fun, arrow[A_K_DN].type);
1125                 key_add(el, &stOC[1], &arrow[A_K_RT].fun, arrow[A_K_RT].type);
1126                 key_add(el, &stOD[1], &arrow[A_K_LT].fun, arrow[A_K_LT].type);
1127                 key_add(el, &stOH[1], &arrow[A_K_HO].fun, arrow[A_K_HO].type);
1128                 key_add(el, &stOF[1], &arrow[A_K_EN].fun, arrow[A_K_EN].type);
1129         }
1130 }
1131
1132
1133 /* term_set_arrow():
1134  *      Set an arrow key binding
1135  */
1136 protected int
1137 term_set_arrow(EditLine *el, const char *name, key_value_t *fun, int type)
1138 {
1139         fkey_t *arrow = el->el_term.t_fkey;
1140         int i;
1141
1142         for (i = 0; i < A_K_NKEYS; i++)
1143                 if (strcmp(name, arrow[i].name) == 0) {
1144                         arrow[i].fun = *fun;
1145                         arrow[i].type = type;
1146                         return (0);
1147                 }
1148         return (-1);
1149 }
1150
1151
1152 /* term_clear_arrow():
1153  *      Clear an arrow key binding
1154  */
1155 protected int
1156 term_clear_arrow(EditLine *el, const char *name)
1157 {
1158         fkey_t *arrow = el->el_term.t_fkey;
1159         int i;
1160
1161         for (i = 0; i < A_K_NKEYS; i++)
1162                 if (strcmp(name, arrow[i].name) == 0) {
1163                         arrow[i].type = XK_NOD;
1164                         return (0);
1165                 }
1166         return (-1);
1167 }
1168
1169
1170 /* term_print_arrow():
1171  *      Print the arrow key bindings
1172  */
1173 protected void
1174 term_print_arrow(EditLine *el, const char *name)
1175 {
1176         int i;
1177         fkey_t *arrow = el->el_term.t_fkey;
1178
1179         for (i = 0; i < A_K_NKEYS; i++)
1180                 if (*name == '\0' || strcmp(name, arrow[i].name) == 0)
1181                         if (arrow[i].type != XK_NOD)
1182                                 key_kprint(el, arrow[i].name, &arrow[i].fun,
1183                                     arrow[i].type);
1184 }
1185
1186
1187 /* term_bind_arrow():
1188  *      Bind the arrow keys
1189  */
1190 protected void
1191 term_bind_arrow(EditLine *el)
1192 {
1193         el_action_t *map;
1194         const el_action_t *dmap;
1195         int i, j;
1196         char *p;
1197         fkey_t *arrow = el->el_term.t_fkey;
1198
1199         /* Check if the components needed are initialized */
1200         if (el->el_term.t_buf == NULL || el->el_map.key == NULL)
1201                 return;
1202
1203         map = el->el_map.type == MAP_VI ? el->el_map.alt : el->el_map.key;
1204         dmap = el->el_map.type == MAP_VI ? el->el_map.vic : el->el_map.emacs;
1205
1206         term_reset_arrow(el);
1207
1208         for (i = 0; i < A_K_NKEYS; i++) {
1209                 p = el->el_term.t_str[arrow[i].key];
1210                 if (p && *p) {
1211                         j = (unsigned char) *p;
1212                         /*
1213                          * Assign the arrow keys only if:
1214                          *
1215                          * 1. They are multi-character arrow keys and the user
1216                          *    has not re-assigned the leading character, or
1217                          *    has re-assigned the leading character to be
1218                          *        ED_SEQUENCE_LEAD_IN
1219                          * 2. They are single arrow keys pointing to an
1220                          *    unassigned key.
1221                          */
1222                         if (arrow[i].type == XK_NOD)
1223                                 key_clear(el, map, p);
1224                         else {
1225                                 if (p[1] && (dmap[j] == map[j] ||
1226                                         map[j] == ED_SEQUENCE_LEAD_IN)) {
1227                                         key_add(el, p, &arrow[i].fun,
1228                                             arrow[i].type);
1229                                         map[j] = ED_SEQUENCE_LEAD_IN;
1230                                 } else if (map[j] == ED_UNASSIGNED) {
1231                                         key_clear(el, map, p);
1232                                         if (arrow[i].type == XK_CMD)
1233                                                 map[j] = arrow[i].fun.cmd;
1234                                         else
1235                                                 key_add(el, p, &arrow[i].fun,
1236                                                     arrow[i].type);
1237                                 }
1238                         }
1239                 }
1240         }
1241 }
1242
1243 /* term_putc():
1244  *      Add a character
1245  */
1246 private int
1247 term_putc(int c)
1248 {
1249
1250         if (term_outfile == NULL)
1251                 return -1;
1252         return fputc(c, term_outfile);
1253 }
1254
1255 private void
1256 term_tputs(EditLine *el, const char *cap, int affcnt)
1257 {
1258 #ifdef _REENTRANT
1259         pthread_mutex_lock(&term_mutex);
1260 #endif
1261         term_outfile = el->el_outfile;
1262         (void)tputs(cap, affcnt, term_putc);
1263 #ifdef _REENTRANT
1264         pthread_mutex_unlock(&term_mutex);
1265 #endif
1266 }
1267
1268 /* term__putc():
1269  *      Add a character
1270  */
1271 protected int
1272 term__putc(EditLine *el, int c)
1273 {
1274
1275         return fputc(c, el->el_outfile);
1276 }
1277
1278 /* term__flush():
1279  *      Flush output
1280  */
1281 protected void
1282 term__flush(EditLine *el)
1283 {
1284
1285         (void) fflush(el->el_outfile);
1286 }
1287
1288 /* term_writec():
1289  *      Write the given character out, in a human readable form
1290  */
1291 protected void
1292 term_writec(EditLine *el, int c)
1293 {
1294         char buf[8];
1295         size_t cnt = key__decode_char(buf, sizeof(buf), 0, c);
1296         buf[cnt] = '\0';
1297         term_overwrite(el, buf, (size_t)cnt);
1298         term__flush(el);
1299 }
1300
1301
1302 /* term_telltc():
1303  *      Print the current termcap characteristics
1304  */
1305 protected int
1306 /*ARGSUSED*/
1307 term_telltc(EditLine *el, int argc __attribute__((__unused__)),
1308     const char **argv __attribute__((__unused__)))
1309 {
1310         const struct termcapstr *t;
1311         char **ts;
1312         char upbuf[EL_BUFSIZ];
1313
1314         (void) fprintf(el->el_outfile, "\n\tYour terminal has the\n");
1315         (void) fprintf(el->el_outfile, "\tfollowing characteristics:\n\n");
1316         (void) fprintf(el->el_outfile, "\tIt has %d columns and %d lines\n",
1317             Val(T_co), Val(T_li));
1318         (void) fprintf(el->el_outfile,
1319             "\tIt has %s meta key\n", EL_HAS_META ? "a" : "no");
1320         (void) fprintf(el->el_outfile,
1321             "\tIt can%suse tabs\n", EL_CAN_TAB ? " " : "not ");
1322         (void) fprintf(el->el_outfile, "\tIt %s automatic margins\n",
1323             EL_HAS_AUTO_MARGINS ? "has" : "does not have");
1324         if (EL_HAS_AUTO_MARGINS)
1325                 (void) fprintf(el->el_outfile, "\tIt %s magic margins\n",
1326                     EL_HAS_MAGIC_MARGINS ? "has" : "does not have");
1327
1328         for (t = tstr, ts = el->el_term.t_str; t->name != NULL; t++, ts++) {
1329                 const char *ub;
1330                 if (*ts && **ts) {
1331                     (void) key__decode_str(*ts, upbuf, sizeof(upbuf), "");
1332                     ub = upbuf;
1333                 } else {
1334                     ub = "(empty)";
1335                 }
1336                 (void) fprintf(el->el_outfile, "\t%25s (%s) == %s\n",
1337                     t->long_name, t->name, ub);
1338         }
1339         (void) fputc('\n', el->el_outfile);
1340         return (0);
1341 }
1342
1343
1344 /* term_settc():
1345  *      Change the current terminal characteristics
1346  */
1347 protected int
1348 /*ARGSUSED*/
1349 term_settc(EditLine *el, int argc __attribute__((__unused__)),
1350     const char **argv)
1351 {
1352         const struct termcapstr *ts;
1353         const struct termcapval *tv;
1354         const char *what, *how;
1355
1356         if (argv == NULL || argv[1] == NULL || argv[2] == NULL)
1357                 return -1;
1358
1359         what = argv[1];
1360         how = argv[2];
1361
1362         /*
1363          * Do the strings first
1364          */
1365         for (ts = tstr; ts->name != NULL; ts++)
1366                 if (strcmp(ts->name, what) == 0)
1367                         break;
1368
1369         if (ts->name != NULL) {
1370                 term_alloc(el, ts, how);
1371                 term_setflags(el);
1372                 return 0;
1373         }
1374         /*
1375          * Do the numeric ones second
1376          */
1377         for (tv = tval; tv->name != NULL; tv++)
1378                 if (strcmp(tv->name, what) == 0)
1379                         break;
1380
1381         if (tv->name != NULL)
1382                 return -1;
1383
1384         if (tv == &tval[T_pt] || tv == &tval[T_km] ||
1385             tv == &tval[T_am] || tv == &tval[T_xn]) {
1386                 if (strcmp(how, "yes") == 0)
1387                         el->el_term.t_val[tv - tval] = 1;
1388                 else if (strcmp(how, "no") == 0)
1389                         el->el_term.t_val[tv - tval] = 0;
1390                 else {
1391                         (void) fprintf(el->el_errfile,
1392                             "%s: Bad value `%s'.\n", argv[0], how);
1393                         return -1;
1394                 }
1395                 term_setflags(el);
1396                 if (term_change_size(el, Val(T_li), Val(T_co)) == -1)
1397                         return -1;
1398                 return 0;
1399         } else {
1400                 long i;
1401                 char *ep;
1402
1403                 i = strtol(how, &ep, 10);
1404                 if (*ep != '\0') {
1405                         (void) fprintf(el->el_errfile,
1406                             "%s: Bad value `%s'.\n", argv[0], how);
1407                         return -1;
1408                 }
1409                 el->el_term.t_val[tv - tval] = (int) i;
1410                 el->el_term.t_size.v = Val(T_co);
1411                 el->el_term.t_size.h = Val(T_li);
1412                 if (tv == &tval[T_co] || tv == &tval[T_li])
1413                         if (term_change_size(el, Val(T_li), Val(T_co))
1414                             == -1)
1415                                 return -1;
1416                 return 0;
1417         }
1418 }
1419
1420
1421 /* term_gettc():
1422  *      Get the current terminal characteristics
1423  */
1424 protected int
1425 /*ARGSUSED*/
1426 term_gettc(EditLine *el, int argc __attribute__((__unused__)), char **argv)
1427 {
1428         const struct termcapstr *ts;
1429         const struct termcapval *tv;
1430         char *what;
1431         void *how;
1432
1433         if (argv == NULL || argv[1] == NULL || argv[2] == NULL)
1434                 return (-1);
1435
1436         what = argv[1];
1437         how = argv[2];
1438
1439         /*
1440          * Do the strings first
1441          */
1442         for (ts = tstr; ts->name != NULL; ts++)
1443                 if (strcmp(ts->name, what) == 0)
1444                         break;
1445
1446         if (ts->name != NULL) {
1447                 *(char **)how = el->el_term.t_str[ts - tstr];
1448                 return 0;
1449         }
1450         /*
1451          * Do the numeric ones second
1452          */
1453         for (tv = tval; tv->name != NULL; tv++)
1454                 if (strcmp(tv->name, what) == 0)
1455                         break;
1456
1457         if (tv->name == NULL)
1458                 return -1;
1459
1460         if (tv == &tval[T_pt] || tv == &tval[T_km] ||
1461             tv == &tval[T_am] || tv == &tval[T_xn]) {
1462                 static char yes[] = "yes";
1463                 static char no[] = "no";
1464                 if (el->el_term.t_val[tv - tval])
1465                         *(char **)how = yes;
1466                 else
1467                         *(char **)how = no;
1468                 return 0;
1469         } else {
1470                 *(int *)how = el->el_term.t_val[tv - tval];
1471                 return 0;
1472         }
1473 }
1474
1475 /* term_echotc():
1476  *      Print the termcap string out with variable substitution
1477  */
1478 protected int
1479 /*ARGSUSED*/
1480 term_echotc(EditLine *el, int argc __attribute__((__unused__)),
1481     const char **argv)
1482 {
1483         char *cap, *scap, *ep;
1484         int arg_need, arg_cols, arg_rows;
1485         int verbose = 0, silent = 0;
1486         char *area;
1487         static const char fmts[] = "%s\n", fmtd[] = "%d\n";
1488         const struct termcapstr *t;
1489         char buf[TC_BUFSIZE];
1490         long i;
1491
1492         area = buf;
1493
1494         if (argv == NULL || argv[1] == NULL)
1495                 return (-1);
1496         argv++;
1497
1498         if (argv[0][0] == '-') {
1499                 switch (argv[0][1]) {
1500                 case 'v':
1501                         verbose = 1;
1502                         break;
1503                 case 's':
1504                         silent = 1;
1505                         break;
1506                 default:
1507                         /* stderror(ERR_NAME | ERR_TCUSAGE); */
1508                         break;
1509                 }
1510                 argv++;
1511         }
1512         if (!*argv || *argv[0] == '\0')
1513                 return (0);
1514         if (strcmp(*argv, "tabs") == 0) {
1515                 (void) fprintf(el->el_outfile, fmts, EL_CAN_TAB ? "yes" : "no");
1516                 return (0);
1517         } else if (strcmp(*argv, "meta") == 0) {
1518                 (void) fprintf(el->el_outfile, fmts, Val(T_km) ? "yes" : "no");
1519                 return (0);
1520         } else if (strcmp(*argv, "xn") == 0) {
1521                 (void) fprintf(el->el_outfile, fmts, EL_HAS_MAGIC_MARGINS ?
1522                     "yes" : "no");
1523                 return (0);
1524         } else if (strcmp(*argv, "am") == 0) {
1525                 (void) fprintf(el->el_outfile, fmts, EL_HAS_AUTO_MARGINS ?
1526                     "yes" : "no");
1527                 return (0);
1528         } else if (strcmp(*argv, "baud") == 0) {
1529 #ifdef notdef
1530                 int i;
1531
1532                 for (i = 0; baud_rate[i].b_name != NULL; i++)
1533                         if (el->el_tty.t_speed == baud_rate[i].b_rate) {
1534                                 (void) fprintf(el->el_outfile, fmts,
1535                                     baud_rate[i].b_name);
1536                                 return (0);
1537                         }
1538                 (void) fprintf(el->el_outfile, fmtd, 0);
1539 #else
1540                 (void) fprintf(el->el_outfile, fmtd, (int)el->el_tty.t_speed);
1541 #endif
1542                 return (0);
1543         } else if (strcmp(*argv, "rows") == 0 || strcmp(*argv, "lines") == 0) {
1544                 (void) fprintf(el->el_outfile, fmtd, Val(T_li));
1545                 return (0);
1546         } else if (strcmp(*argv, "cols") == 0) {
1547                 (void) fprintf(el->el_outfile, fmtd, Val(T_co));
1548                 return (0);
1549         }
1550         /*
1551          * Try to use our local definition first
1552          */
1553         scap = NULL;
1554         for (t = tstr; t->name != NULL; t++)
1555                 if (strcmp(t->name, *argv) == 0) {
1556                         scap = el->el_term.t_str[t - tstr];
1557                         break;
1558                 }
1559         if (t->name == NULL) {
1560                 /* XXX: some systems' tgetstr needs non const */
1561                 scap = tgetstr(strchr(*argv, **argv), &area);
1562         }
1563         if (!scap || scap[0] == '\0') {
1564                 if (!silent)
1565                         (void) fprintf(el->el_errfile,
1566                             "echotc: Termcap parameter `%s' not found.\n",
1567                             *argv);
1568                 return (-1);
1569         }
1570         /*
1571          * Count home many values we need for this capability.
1572          */
1573         for (cap = scap, arg_need = 0; *cap; cap++)
1574                 if (*cap == '%')
1575                         switch (*++cap) {
1576                         case 'd':
1577                         case '2':
1578                         case '3':
1579                         case '.':
1580                         case '+':
1581                                 arg_need++;
1582                                 break;
1583                         case '%':
1584                         case '>':
1585                         case 'i':
1586                         case 'r':
1587                         case 'n':
1588                         case 'B':
1589                         case 'D':
1590                                 break;
1591                         default:
1592                                 /*
1593                                  * hpux has lot's of them...
1594                                  */
1595                                 if (verbose)
1596                                         (void) fprintf(el->el_errfile,
1597                                 "echotc: Warning: unknown termcap %% `%c'.\n",
1598                                             *cap);
1599                                 /* This is bad, but I won't complain */
1600                                 break;
1601                         }
1602
1603         switch (arg_need) {
1604         case 0:
1605                 argv++;
1606                 if (*argv && *argv[0]) {
1607                         if (!silent)
1608                                 (void) fprintf(el->el_errfile,
1609                                     "echotc: Warning: Extra argument `%s'.\n",
1610                                     *argv);
1611                         return (-1);
1612                 }
1613                 term_tputs(el, scap, 1);
1614                 break;
1615         case 1:
1616                 argv++;
1617                 if (!*argv || *argv[0] == '\0') {
1618                         if (!silent)
1619                                 (void) fprintf(el->el_errfile,
1620                                     "echotc: Warning: Missing argument.\n");
1621                         return (-1);
1622                 }
1623                 arg_cols = 0;
1624                 i = strtol(*argv, &ep, 10);
1625                 if (*ep != '\0' || i < 0) {
1626                         if (!silent)
1627                                 (void) fprintf(el->el_errfile,
1628                                     "echotc: Bad value `%s' for rows.\n",
1629                                     *argv);
1630                         return (-1);
1631                 }
1632                 arg_rows = (int) i;
1633                 argv++;
1634                 if (*argv && *argv[0]) {
1635                         if (!silent)
1636                                 (void) fprintf(el->el_errfile,
1637                                     "echotc: Warning: Extra argument `%s'.\n",
1638                                     *argv);
1639                         return (-1);
1640                 }
1641                 term_tputs(el, tgoto(scap, arg_cols, arg_rows), 1);
1642                 break;
1643         default:
1644                 /* This is wrong, but I will ignore it... */
1645                 if (verbose)
1646                         (void) fprintf(el->el_errfile,
1647                          "echotc: Warning: Too many required arguments (%d).\n",
1648                             arg_need);
1649                 /* FALLTHROUGH */
1650         case 2:
1651                 argv++;
1652                 if (!*argv || *argv[0] == '\0') {
1653                         if (!silent)
1654                                 (void) fprintf(el->el_errfile,
1655                                     "echotc: Warning: Missing argument.\n");
1656                         return (-1);
1657                 }
1658                 i = strtol(*argv, &ep, 10);
1659                 if (*ep != '\0' || i < 0) {
1660                         if (!silent)
1661                                 (void) fprintf(el->el_errfile,
1662                                     "echotc: Bad value `%s' for cols.\n",
1663                                     *argv);
1664                         return (-1);
1665                 }
1666                 arg_cols = (int) i;
1667                 argv++;
1668                 if (!*argv || *argv[0] == '\0') {
1669                         if (!silent)
1670                                 (void) fprintf(el->el_errfile,
1671                                     "echotc: Warning: Missing argument.\n");
1672                         return (-1);
1673                 }
1674                 i = strtol(*argv, &ep, 10);
1675                 if (*ep != '\0' || i < 0) {
1676                         if (!silent)
1677                                 (void) fprintf(el->el_errfile,
1678                                     "echotc: Bad value `%s' for rows.\n",
1679                                     *argv);
1680                         return (-1);
1681                 }
1682                 arg_rows = (int) i;
1683                 if (*ep != '\0') {
1684                         if (!silent)
1685                                 (void) fprintf(el->el_errfile,
1686                                     "echotc: Bad value `%s'.\n", *argv);
1687                         return (-1);
1688                 }
1689                 argv++;
1690                 if (*argv && *argv[0]) {
1691                         if (!silent)
1692                                 (void) fprintf(el->el_errfile,
1693                                     "echotc: Warning: Extra argument `%s'.\n",
1694                                     *argv);
1695                         return (-1);
1696                 }
1697                 term_tputs(el, tgoto(scap, arg_cols, arg_rows), arg_rows);
1698                 break;
1699         }
1700         return (0);
1701 }