lib/libedit/common.c

   1 /*      $NetBSD: common.c,v 1.23 2009/02/27 04:18:45 msaitoh 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[] = "@(#)common.c    8.1 (Berkeley) 6/4/93";
  39 #else
  40 __RCSID("$NetBSD: common.c,v 1.23 2009/02/27 04:18:45 msaitoh Exp $");
  41 #endif
  42 #endif /* not lint && not SCCSID */
  43
  44 /*
  45  * common.c: Common Editor functions
  46  */
  47 #include "el.h"
  48
  49 /* ed_end_of_file():
  50  *      Indicate end of file
  51  *      [^D]
  52  */
  53 protected el_action_t
  54 /*ARGSUSED*/
  55 ed_end_of_file(EditLine *el, Int c __attribute__((__unused__)))
  56 {
  57
  58         re_goto_bottom(el);
  59         *el->el_line.lastchar = '\0';
  60         return (CC_EOF);
  61 }
  62
  63
  64 /* ed_insert():
  65  *      Add character to the line
  66  *      Insert a character [bound to all insert keys]
  67  */
  68 protected el_action_t
  69 ed_insert(EditLine *el, Int c)
  70 {
  71         int count = el->el_state.argument;
  72
  73         if (c == '\0')
  74                 return (CC_ERROR);
  75
  76         if (el->el_line.lastchar + el->el_state.argument >=
  77             el->el_line.limit) {
  78                 /* end of buffer space, try to allocate more */
  79                 if (!ch_enlargebufs(el, (size_t) count))
  80                         return CC_ERROR;        /* error allocating more */
  81         }
  82
  83         if (count == 1) {
  84                 if (el->el_state.inputmode == MODE_INSERT
  85                     || el->el_line.cursor >= el->el_line.lastchar)
  86                         c_insert(el, 1);
  87
  88                 *el->el_line.cursor++ = c;
  89                 re_fastaddc(el);                /* fast refresh for one char. */
  90         } else {
  91                 if (el->el_state.inputmode != MODE_REPLACE_1)
  92                         c_insert(el, el->el_state.argument);
  93
  94                 while (count-- && el->el_line.cursor < el->el_line.lastchar)
  95                         *el->el_line.cursor++ = c;
  96                 re_refresh(el);
  97         }
  98
  99         if (el->el_state.inputmode == MODE_REPLACE_1)
 100                 return vi_command_mode(el, 0);
 101
 102         return (CC_NORM);
 103 }
 104
 105
 106 /* ed_delete_prev_word():
 107  *      Delete from beginning of current word to cursor
 108  *      [M-^?] [^W]
 109  */
 110 protected el_action_t
 111 /*ARGSUSED*/
 112 ed_delete_prev_word(EditLine *el, Int c __attribute__((__unused__)))
 113 {
 114         Char *cp, *p, *kp;
 115
 116         if (el->el_line.cursor == el->el_line.buffer)
 117                 return (CC_ERROR);
 118
 119         cp = c__prev_word(el->el_line.cursor, el->el_line.buffer,
 120             el->el_state.argument, ce__isword);
 121
 122         for (p = cp, kp = el->el_chared.c_kill.buf; p < el->el_line.cursor; p++)
 123                 *kp++ = *p;
 124         el->el_chared.c_kill.last = kp;
 125
 126         c_delbefore(el, (int)(el->el_line.cursor - cp));/* delete before dot */
 127         el->el_line.cursor = cp;
 128         if (el->el_line.cursor < el->el_line.buffer)
 129                 el->el_line.cursor = el->el_line.buffer; /* bounds check */
 130         return (CC_REFRESH);
 131 }
 132
 133
 134 /* ed_delete_next_char():
 135  *      Delete character under cursor
 136  *      [^D] [x]
 137  */
 138 protected el_action_t
 139 /*ARGSUSED*/
 140 ed_delete_next_char(EditLine *el, Int c)
 141 {
 142 #ifdef notdef                   /* XXX */
 143 #define EL      el->el_line
 144         (void) fprintf(el->el_errlfile,
 145             "\nD(b: %x(%s)  c: %x(%s) last: %x(%s) limit: %x(%s)\n",
 146             EL.buffer, EL.buffer, EL.cursor, EL.cursor, EL.lastchar,
 147             EL.lastchar, EL.limit, EL.limit);
 148 #endif
 149         if (el->el_line.cursor == el->el_line.lastchar) {
 150                         /* if I'm at the end */
 151                 if (el->el_map.type == MAP_VI) {
 152                         if (el->el_line.cursor == el->el_line.buffer) {
 153                                 /* if I'm also at the beginning */
 154 #ifdef KSHVI
 155                                 return (CC_ERROR);
 156 #else
 157                                 /* then do an EOF */
 158                                 term_writec(el, c);
 159                                 return (CC_EOF);
 160 #endif
 161                         } else {
 162 #ifdef KSHVI
 163                                 el->el_line.cursor--;
 164 #else
 165                                 return (CC_ERROR);
 166 #endif
 167                         }
 168                 } else {
 169                         if (el->el_line.cursor != el->el_line.buffer)
 170                                 el->el_line.cursor--;
 171                         else
 172                                 return (CC_ERROR);
 173                 }
 174         }
 175         c_delafter(el, el->el_state.argument);  /* delete after dot */
 176         if (el->el_line.cursor >= el->el_line.lastchar &&
 177             el->el_line.cursor > el->el_line.buffer)
 178                         /* bounds check */
 179                 el->el_line.cursor = el->el_line.lastchar - 1;
 180         return (CC_REFRESH);
 181 }
 182
 183
 184 /* ed_kill_line():
 185  *      Cut to the end of line
 186  *      [^K] [^K]
 187  */
 188 protected el_action_t
 189 /*ARGSUSED*/
 190 ed_kill_line(EditLine *el, Int c __attribute__((__unused__)))
 191 {
 192         Char *kp, *cp;
 193
 194         cp = el->el_line.cursor;
 195         kp = el->el_chared.c_kill.buf;
 196         while (cp < el->el_line.lastchar)
 197                 *kp++ = *cp++;  /* copy it */
 198         el->el_chared.c_kill.last = kp;
 199                         /* zap! -- delete to end */
 200         el->el_line.lastchar = el->el_line.cursor;
 201         return (CC_REFRESH);
 202 }
 203
 204
 205 /* ed_move_to_end():
 206  *      Move cursor to the end of line
 207  *      [^E] [^E]
 208  */
 209 protected el_action_t
 210 /*ARGSUSED*/
 211 ed_move_to_end(EditLine *el, Int c __attribute__((__unused__)))
 212 {
 213
 214         el->el_line.cursor = el->el_line.lastchar;
 215         if (el->el_map.type == MAP_VI) {
 216                 if (el->el_chared.c_vcmd.action != NOP) {
 217                         cv_delfini(el);
 218                         return (CC_REFRESH);
 219                 }
 220 #ifdef VI_MOVE
 221                 el->el_line.cursor--;
 222 #endif
 223         }
 224         return (CC_CURSOR);
 225 }
 226
 227
 228 /* ed_move_to_beg():
 229  *      Move cursor to the beginning of line
 230  *      [^A] [^A]
 231  */
 232 protected el_action_t
 233 /*ARGSUSED*/
 234 ed_move_to_beg(EditLine *el, Int c __attribute__((__unused__)))
 235 {
 236
 237         el->el_line.cursor = el->el_line.buffer;
 238
 239         if (el->el_map.type == MAP_VI) {
 240                         /* We want FIRST non space character */
 241                 while (Isspace(*el->el_line.cursor))
 242                         el->el_line.cursor++;
 243                 if (el->el_chared.c_vcmd.action != NOP) {
 244                         cv_delfini(el);
 245                         return (CC_REFRESH);
 246                 }
 247         }
 248         return (CC_CURSOR);
 249 }
 250
 251
 252 /* ed_transpose_chars():
 253  *      Exchange the character to the left of the cursor with the one under it
 254  *      [^T] [^T]
 255  */
 256 protected el_action_t
 257 ed_transpose_chars(EditLine *el, Int c)
 258 {
 259
 260         if (el->el_line.cursor < el->el_line.lastchar) {
 261                 if (el->el_line.lastchar <= &el->el_line.buffer[1])
 262                         return (CC_ERROR);
 263                 else
 264                         el->el_line.cursor++;
 265         }
 266         if (el->el_line.cursor > &el->el_line.buffer[1]) {
 267                 /* must have at least two chars entered */
 268                 c = el->el_line.cursor[-2];
 269                 el->el_line.cursor[-2] = el->el_line.cursor[-1];
 270                 el->el_line.cursor[-1] = c;
 271                 return (CC_REFRESH);
 272         } else
 273                 return (CC_ERROR);
 274 }
 275
 276
 277 /* ed_next_char():
 278  *      Move to the right one character
 279  *      [^F] [^F]
 280  */
 281 protected el_action_t
 282 /*ARGSUSED*/
 283 ed_next_char(EditLine *el, Int c __attribute__((__unused__)))
 284 {
 285         Char *lim = el->el_line.lastchar;
 286
 287         if (el->el_line.cursor >= lim ||
 288             (el->el_line.cursor == lim - 1 &&
 289             el->el_map.type == MAP_VI &&
 290             el->el_chared.c_vcmd.action == NOP))
 291                 return (CC_ERROR);
 292
 293         el->el_line.cursor += el->el_state.argument;
 294         if (el->el_line.cursor > lim)
 295                 el->el_line.cursor = lim;
 296
 297         if (el->el_map.type == MAP_VI)
 298                 if (el->el_chared.c_vcmd.action != NOP) {
 299                         cv_delfini(el);
 300                         return (CC_REFRESH);
 301                 }
 302         return (CC_CURSOR);
 303 }
 304
 305
 306 /* ed_prev_word():
 307  *      Move to the beginning of the current word
 308  *      [M-b] [b]
 309  */
 310 protected el_action_t
 311 /*ARGSUSED*/
 312 ed_prev_word(EditLine *el, Int c __attribute__((__unused__)))
 313 {
 314
 315         if (el->el_line.cursor == el->el_line.buffer)
 316                 return (CC_ERROR);
 317
 318         el->el_line.cursor = c__prev_word(el->el_line.cursor,
 319             el->el_line.buffer,
 320             el->el_state.argument,
 321             ce__isword);
 322
 323         if (el->el_map.type == MAP_VI)
 324                 if (el->el_chared.c_vcmd.action != NOP) {
 325                         cv_delfini(el);
 326                         return (CC_REFRESH);
 327                 }
 328         return (CC_CURSOR);
 329 }
 330
 331
 332 /* ed_prev_char():
 333  *      Move to the left one character
 334  *      [^B] [^B]
 335  */
 336 protected el_action_t
 337 /*ARGSUSED*/
 338 ed_prev_char(EditLine *el, Int c __attribute__((__unused__)))
 339 {
 340
 341         if (el->el_line.cursor > el->el_line.buffer) {
 342                 el->el_line.cursor -= el->el_state.argument;
 343                 if (el->el_line.cursor < el->el_line.buffer)
 344                         el->el_line.cursor = el->el_line.buffer;
 345
 346                 if (el->el_map.type == MAP_VI)
 347                         if (el->el_chared.c_vcmd.action != NOP) {
 348                                 cv_delfini(el);
 349                                 return (CC_REFRESH);
 350                         }
 351                 return (CC_CURSOR);
 352         } else
 353                 return (CC_ERROR);
 354 }
 355
 356
 357 /* ed_quoted_insert():
 358  *      Add the next character typed verbatim
 359  *      [^V] [^V]
 360  */
 361 protected el_action_t
 362 ed_quoted_insert(EditLine *el, Int c)
 363 {
 364         int num;
 365         Char tc;
 366
 367         tty_quotemode(el);
 368         num = FUN(el,getc)(el, &tc);
 369         c = tc;
 370         tty_noquotemode(el);
 371         if (num == 1)
 372                 return (ed_insert(el, c));
 373         else
 374                 return (ed_end_of_file(el, 0));
 375 }
 376
 377
 378 /* ed_digit():
 379  *      Adds to argument or enters a digit
 380  */
 381 protected el_action_t
 382 ed_digit(EditLine *el, Int c)
 383 {
 384
 385         if (!Isdigit(c))
 386                 return (CC_ERROR);
 387
 388         if (el->el_state.doingarg) {
 389                         /* if doing an arg, add this in... */
 390                 if (el->el_state.lastcmd == EM_UNIVERSAL_ARGUMENT)
 391                         el->el_state.argument = c - '0';
 392                 else {
 393                         if (el->el_state.argument > 1000000)
 394                                 return (CC_ERROR);
 395                         el->el_state.argument =
 396                             (el->el_state.argument * 10) + (c - '0');
 397                 }
 398                 return (CC_ARGHACK);
 399         }
 400
 401         return ed_insert(el, c);
 402 }
 403
 404
 405 /* ed_argument_digit():
 406  *      Digit that starts argument
 407  *      For ESC-n
 408  */
 409 protected el_action_t
 410 ed_argument_digit(EditLine *el, Int c)
 411 {
 412
 413         if (!Isdigit(c))
 414                 return (CC_ERROR);
 415
 416         if (el->el_state.doingarg) {
 417                 if (el->el_state.argument > 1000000)
 418                         return (CC_ERROR);
 419                 el->el_state.argument = (el->el_state.argument * 10) +
 420                     (c - '0');
 421         } else {                /* else starting an argument */
 422                 el->el_state.argument = c - '0';
 423                 el->el_state.doingarg = 1;
 424         }
 425         return (CC_ARGHACK);
 426 }
 427
 428
 429 /* ed_unassigned():
 430  *      Indicates unbound character
 431  *      Bound to keys that are not assigned
 432  */
 433 protected el_action_t
 434 /*ARGSUSED*/
 435 ed_unassigned(EditLine *el, Int c __attribute__((__unused__)))
 436 {
 437
 438         return (CC_ERROR);
 439 }
 440
 441
 442 /**
 443  ** TTY key handling.
 444  **/
 445
 446 /* ed_tty_sigint():
 447  *      Tty interrupt character
 448  *      [^C]
 449  */
 450 protected el_action_t
 451 /*ARGSUSED*/
 452 ed_tty_sigint(EditLine *el __attribute__((__unused__)),
 453               Int c __attribute__((__unused__)))
 454 {
 455
 456         return (CC_NORM);
 457 }
 458
 459
 460 /* ed_tty_dsusp():
 461  *      Tty delayed suspend character
 462  *      [^Y]
 463  */
 464 protected el_action_t
 465 /*ARGSUSED*/
 466 ed_tty_dsusp(EditLine *el __attribute__((__unused__)),
 467              Int c __attribute__((__unused__)))
 468 {
 469
 470         return (CC_NORM);
 471 }
 472
 473
 474 /* ed_tty_flush_output():
 475  *      Tty flush output characters
 476  *      [^O]
 477  */
 478 protected el_action_t
 479 /*ARGSUSED*/
 480 ed_tty_flush_output(EditLine *el __attribute__((__unused__)),
 481                     Int c __attribute__((__unused__)))
 482 {
 483
 484         return (CC_NORM);
 485 }
 486
 487
 488 /* ed_tty_sigquit():
 489  *      Tty quit character
 490  *      [^\]
 491  */
 492 protected el_action_t
 493 /*ARGSUSED*/
 494 ed_tty_sigquit(EditLine *el __attribute__((__unused__)),
 495                Int c __attribute__((__unused__)))
 496 {
 497
 498         return (CC_NORM);
 499 }
 500
 501
 502 /* ed_tty_sigtstp():
 503  *      Tty suspend character
 504  *      [^Z]
 505  */
 506 protected el_action_t
 507 /*ARGSUSED*/
 508 ed_tty_sigtstp(EditLine *el __attribute__((__unused__)),
 509                Int c __attribute__((__unused__)))
 510 {
 511
 512         return (CC_NORM);
 513 }
 514
 515
 516 /* ed_tty_stop_output():
 517  *      Tty disallow output characters
 518  *      [^S]
 519  */
 520 protected el_action_t
 521 /*ARGSUSED*/
 522 ed_tty_stop_output(EditLine *el __attribute__((__unused__)),
 523                    Int c __attribute__((__unused__)))
 524 {
 525
 526         return (CC_NORM);
 527 }
 528
 529
 530 /* ed_tty_start_output():
 531  *      Tty allow output characters
 532  *      [^Q]
 533  */
 534 protected el_action_t
 535 /*ARGSUSED*/
 536 ed_tty_start_output(EditLine *el __attribute__((__unused__)),
 537                     Int c __attribute__((__unused__)))
 538 {
 539
 540         return (CC_NORM);
 541 }
 542
 543
 544 /* ed_newline():
 545  *      Execute command
 546  *      [^J]
 547  */
 548 protected el_action_t
 549 /*ARGSUSED*/
 550 ed_newline(EditLine *el, Int c __attribute__((__unused__)))
 551 {
 552
 553         re_goto_bottom(el);
 554         *el->el_line.lastchar++ = '\n';
 555         *el->el_line.lastchar = '\0';
 556         return (CC_NEWLINE);
 557 }
 558
 559
 560 /* ed_delete_prev_char():
 561  *      Delete the character to the left of the cursor
 562  *      [^?]
 563  */
 564 protected el_action_t
 565 /*ARGSUSED*/
 566 ed_delete_prev_char(EditLine *el, Int c __attribute__((__unused__)))
 567 {
 568
 569         if (el->el_line.cursor <= el->el_line.buffer)
 570                 return (CC_ERROR);
 571
 572         c_delbefore(el, el->el_state.argument);
 573         el->el_line.cursor -= el->el_state.argument;
 574         if (el->el_line.cursor < el->el_line.buffer)
 575                 el->el_line.cursor = el->el_line.buffer;
 576         return (CC_REFRESH);
 577 }
 578
 579
 580 /* ed_clear_screen():
 581  *      Clear screen leaving current line at the top
 582  *      [^L]
 583  */
 584 protected el_action_t
 585 /*ARGSUSED*/
 586 ed_clear_screen(EditLine *el, Int c __attribute__((__unused__)))
 587 {
 588
 589         term_clear_screen(el);  /* clear the whole real screen */
 590         re_clear_display(el);   /* reset everything */
 591         return (CC_REFRESH);
 592 }
 593
 594
 595 /* ed_redisplay():
 596  *      Redisplay everything
 597  *      ^R
 598  */
 599 protected el_action_t
 600 /*ARGSUSED*/
 601 ed_redisplay(EditLine *el __attribute__((__unused__)),
 602              Int c __attribute__((__unused__)))
 603 {
 604
 605         return (CC_REDISPLAY);
 606 }
 607
 608
 609 /* ed_start_over():
 610  *      Erase current line and start from scratch
 611  *      [^G]
 612  */
 613 protected el_action_t
 614 /*ARGSUSED*/
 615 ed_start_over(EditLine *el, Int c __attribute__((__unused__)))
 616 {
 617
 618         ch_reset(el, 0);
 619         return (CC_REFRESH);
 620 }
 621
 622
 623 /* ed_sequence_lead_in():
 624  *      First character in a bound sequence
 625  *      Placeholder for external keys
 626  */
 627 protected el_action_t
 628 /*ARGSUSED*/
 629 ed_sequence_lead_in(EditLine *el __attribute__((__unused__)),
 630                     Int c __attribute__((__unused__)))
 631 {
 632
 633         return (CC_NORM);
 634 }
 635
 636
 637 /* ed_prev_history():
 638  *      Move to the previous history line
 639  *      [^P] [k]
 640  */
 641 protected el_action_t
 642 /*ARGSUSED*/
 643 ed_prev_history(EditLine *el, Int c __attribute__((__unused__)))
 644 {
 645         char beep = 0;
 646         int sv_event = el->el_history.eventno;
 647
 648         el->el_chared.c_undo.len = -1;
 649         *el->el_line.lastchar = '\0';           /* just in case */
 650
 651         if (el->el_history.eventno == 0) {      /* save the current buffer
 652                                                  * away */
 653                 (void) Strncpy(el->el_history.buf, el->el_line.buffer,
 654                     EL_BUFSIZ);
 655                 el->el_history.last = el->el_history.buf +
 656                     (el->el_line.lastchar - el->el_line.buffer);
 657         }
 658         el->el_history.eventno += el->el_state.argument;
 659
 660         if (hist_get(el) == CC_ERROR) {
 661                 if (el->el_map.type == MAP_VI) {
 662                         el->el_history.eventno = sv_event;
 663
 664                 }
 665                 beep = 1;
 666                 /* el->el_history.eventno was fixed by first call */
 667                 (void) hist_get(el);
 668         }
 669         if (beep)
 670                 return CC_REFRESH_BEEP;
 671         return CC_REFRESH;
 672 }
 673
 674
 675 /* ed_next_history():
 676  *      Move to the next history line
 677  *      [^N] [j]
 678  */
 679 protected el_action_t
 680 /*ARGSUSED*/
 681 ed_next_history(EditLine *el, Int c __attribute__((__unused__)))
 682 {
 683         el_action_t beep = CC_REFRESH, rval;
 684
 685         el->el_chared.c_undo.len = -1;
 686         *el->el_line.lastchar = '\0';   /* just in case */
 687
 688         el->el_history.eventno -= el->el_state.argument;
 689
 690         if (el->el_history.eventno < 0) {
 691                 el->el_history.eventno = 0;
 692                 beep = CC_REFRESH_BEEP;
 693         }
 694         rval = hist_get(el);
 695         if (rval == CC_REFRESH)
 696                 return beep;
 697         return rval;
 698
 699 }
 700
 701
 702 /* ed_search_prev_history():
 703  *      Search previous in history for a line matching the current
 704  *      next search history [M-P] [K]
 705  */
 706 protected el_action_t
 707 /*ARGSUSED*/
 708 ed_search_prev_history(EditLine *el, Int c __attribute__((__unused__)))
 709 {
 710         const Char *hp;
 711         int h;
 712         bool_t found = 0;
 713
 714         el->el_chared.c_vcmd.action = NOP;
 715         el->el_chared.c_undo.len = -1;
 716         *el->el_line.lastchar = '\0';   /* just in case */
 717         if (el->el_history.eventno < 0) {
 718 #ifdef DEBUG_EDIT
 719                 (void) fprintf(el->el_errfile,
 720                     "e_prev_search_hist(): eventno < 0;\n");
 721 #endif
 722                 el->el_history.eventno = 0;
 723                 return (CC_ERROR);
 724         }
 725         if (el->el_history.eventno == 0) {
 726                 (void) Strncpy(el->el_history.buf, el->el_line.buffer,
 727                     EL_BUFSIZ);
 728                 el->el_history.last = el->el_history.buf +
 729                     (el->el_line.lastchar - el->el_line.buffer);
 730         }
 731         if (el->el_history.ref == NULL)
 732                 return (CC_ERROR);
 733
 734         hp = HIST_FIRST(el);
 735         if (hp == NULL)
 736                 return (CC_ERROR);
 737
 738         c_setpat(el);           /* Set search pattern !! */
 739
 740         for (h = 1; h <= el->el_history.eventno; h++)
 741                 hp = HIST_NEXT(el);
 742
 743         while (hp != NULL) {
 744 #ifdef SDEBUG
 745                 (void) fprintf(el->el_errfile, "Comparing with \"%s\"\n", hp);
 746 #endif
 747                 if ((Strncmp(hp, el->el_line.buffer, (size_t)
 748                             (el->el_line.lastchar - el->el_line.buffer)) ||
 749                         hp[el->el_line.lastchar - el->el_line.buffer]) &&
 750                     c_hmatch(el, hp)) {
 751                         found++;
 752                         break;
 753                 }
 754                 h++;
 755                 hp = HIST_NEXT(el);
 756         }
 757
 758         if (!found) {
 759 #ifdef SDEBUG
 760                 (void) fprintf(el->el_errfile, "not found\n");
 761 #endif
 762                 return (CC_ERROR);
 763         }
 764         el->el_history.eventno = h;
 765
 766         return (hist_get(el));
 767 }
 768
 769
 770 /* ed_search_next_history():
 771  *      Search next in history for a line matching the current
 772  *      [M-N] [J]
 773  */
 774 protected el_action_t
 775 /*ARGSUSED*/
 776 ed_search_next_history(EditLine *el, Int c __attribute__((__unused__)))
 777 {
 778         const Char *hp;
 779         int h;
 780         bool_t found = 0;
 781
 782         el->el_chared.c_vcmd.action = NOP;
 783         el->el_chared.c_undo.len = -1;
 784         *el->el_line.lastchar = '\0';   /* just in case */
 785
 786         if (el->el_history.eventno == 0)
 787                 return (CC_ERROR);
 788
 789         if (el->el_history.ref == NULL)
 790                 return (CC_ERROR);
 791
 792         hp = HIST_FIRST(el);
 793         if (hp == NULL)
 794                 return (CC_ERROR);
 795
 796         c_setpat(el);           /* Set search pattern !! */
 797
 798         for (h = 1; h < el->el_history.eventno && hp; h++) {
 799 #ifdef SDEBUG
 800                 (void) fprintf(el->el_errfile, "Comparing with \"%s\"\n", hp);
 801 #endif
 802                 if ((Strncmp(hp, el->el_line.buffer, (size_t)
 803                             (el->el_line.lastchar - el->el_line.buffer)) ||
 804                         hp[el->el_line.lastchar - el->el_line.buffer]) &&
 805                     c_hmatch(el, hp))
 806                         found = h;
 807                 hp = HIST_NEXT(el);
 808         }
 809
 810         if (!found) {           /* is it the current history number? */
 811                 if (!c_hmatch(el, el->el_history.buf)) {
 812 #ifdef SDEBUG
 813                         (void) fprintf(el->el_errfile, "not found\n");
 814 #endif
 815                         return (CC_ERROR);
 816                 }
 817         }
 818         el->el_history.eventno = found;
 819
 820         return (hist_get(el));
 821 }
 822
 823
 824 /* ed_prev_line():
 825  *      Move up one line
 826  *      Could be [k] [^p]
 827  */
 828 protected el_action_t
 829 /*ARGSUSED*/
 830 ed_prev_line(EditLine *el, Int c __attribute__((__unused__)))
 831 {
 832         Char *ptr;
 833         int nchars = c_hpos(el);
 834
 835         /*
 836          * Move to the line requested
 837          */
 838         if (*(ptr = el->el_line.cursor) == '\n')
 839                 ptr--;
 840
 841         for (; ptr >= el->el_line.buffer; ptr--)
 842                 if (*ptr == '\n' && --el->el_state.argument <= 0)
 843                         break;
 844
 845         if (el->el_state.argument > 0)
 846                 return (CC_ERROR);
 847
 848         /*
 849          * Move to the beginning of the line
 850          */
 851         for (ptr--; ptr >= el->el_line.buffer && *ptr != '\n'; ptr--)
 852                 continue;
 853
 854         /*
 855          * Move to the character requested
 856          */
 857         for (ptr++;
 858             nchars-- > 0 && ptr < el->el_line.lastchar && *ptr != '\n';
 859             ptr++)
 860                 continue;
 861
 862         el->el_line.cursor = ptr;
 863         return (CC_CURSOR);
 864 }
 865
 866
 867 /* ed_next_line():
 868  *      Move down one line
 869  *      Could be [j] [^n]
 870  */
 871 protected el_action_t
 872 /*ARGSUSED*/
 873 ed_next_line(EditLine *el, Int c __attribute__((__unused__)))
 874 {
 875         Char *ptr;
 876         int nchars = c_hpos(el);
 877
 878         /*
 879          * Move to the line requested
 880          */
 881         for (ptr = el->el_line.cursor; ptr < el->el_line.lastchar; ptr++)
 882                 if (*ptr == '\n' && --el->el_state.argument <= 0)
 883                         break;
 884
 885         if (el->el_state.argument > 0)
 886                 return (CC_ERROR);
 887
 888         /*
 889          * Move to the character requested
 890          */
 891         for (ptr++;
 892             nchars-- > 0 && ptr < el->el_line.lastchar && *ptr != '\n';
 893             ptr++)
 894                 continue;
 895
 896         el->el_line.cursor = ptr;
 897         return (CC_CURSOR);
 898 }
 899
 900
 901 /* ed_command():
 902  *      Editline extended command
 903  *      [M-X] [:]
 904  */
 905 protected el_action_t
 906 /*ARGSUSED*/
 907 ed_command(EditLine *el, Int c __attribute__((__unused__)))
 908 {
 909         Char tmpbuf[EL_BUFSIZ];
 910         int tmplen;
 911
 912         tmplen = c_gets(el, tmpbuf, STR("\n: "));
 913         term__putc(el, '\n');
 914
 915         if (tmplen < 0 || (tmpbuf[tmplen] = 0, parse_line(el, tmpbuf)) == -1)
 916                 term_beep(el);
 917
 918         el->el_map.current = el->el_map.key;
 919         re_clear_display(el);
 920         return CC_REFRESH;
 921 }