lib/libedit/common.c

   1 /*      $NetBSD: common.c,v 1.29 2012/03/24 20:08:43 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[] = "@(#)common.c    8.1 (Berkeley) 6/4/93";
  39 #else
  40 __RCSID("$NetBSD: common.c,v 1.29 2012/03/24 20:08:43 christos 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 __attribute__((__unused__)))
 141 {
 142 #ifdef DEBUG_EDIT
 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                                 terminal_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                                 return CC_ERROR;
 170         }
 171         c_delafter(el, el->el_state.argument);  /* delete after dot */
 172         if (el->el_map.type == MAP_VI &&
 173             el->el_line.cursor >= el->el_line.lastchar &&
 174             el->el_line.cursor > el->el_line.buffer)
 175                         /* bounds check */
 176                 el->el_line.cursor = el->el_line.lastchar - 1;
 177         return CC_REFRESH;
 178 }
 179
 180
 181 /* ed_kill_line():
 182  *      Cut to the end of line
 183  *      [^K] [^K]
 184  */
 185 protected el_action_t
 186 /*ARGSUSED*/
 187 ed_kill_line(EditLine *el, Int c __attribute__((__unused__)))
 188 {
 189         Char *kp, *cp;
 190
 191         cp = el->el_line.cursor;
 192         kp = el->el_chared.c_kill.buf;
 193         while (cp < el->el_line.lastchar)
 194                 *kp++ = *cp++;  /* copy it */
 195         el->el_chared.c_kill.last = kp;
 196                         /* zap! -- delete to end */
 197         el->el_line.lastchar = el->el_line.cursor;
 198         return CC_REFRESH;
 199 }
 200
 201
 202 /* ed_move_to_end():
 203  *      Move cursor to the end of line
 204  *      [^E] [^E]
 205  */
 206 protected el_action_t
 207 /*ARGSUSED*/
 208 ed_move_to_end(EditLine *el, Int c __attribute__((__unused__)))
 209 {
 210
 211         el->el_line.cursor = el->el_line.lastchar;
 212         if (el->el_map.type == MAP_VI) {
 213                 if (el->el_chared.c_vcmd.action != NOP) {
 214                         cv_delfini(el);
 215                         return CC_REFRESH;
 216                 }
 217 #ifdef VI_MOVE
 218                 el->el_line.cursor--;
 219 #endif
 220         }
 221         return CC_CURSOR;
 222 }
 223
 224
 225 /* ed_move_to_beg():
 226  *      Move cursor to the beginning of line
 227  *      [^A] [^A]
 228  */
 229 protected el_action_t
 230 /*ARGSUSED*/
 231 ed_move_to_beg(EditLine *el, Int c __attribute__((__unused__)))
 232 {
 233
 234         el->el_line.cursor = el->el_line.buffer;
 235
 236         if (el->el_map.type == MAP_VI) {
 237                         /* We want FIRST non space character */
 238                 while (Isspace(*el->el_line.cursor))
 239                         el->el_line.cursor++;
 240                 if (el->el_chared.c_vcmd.action != NOP) {
 241                         cv_delfini(el);
 242                         return CC_REFRESH;
 243                 }
 244         }
 245         return CC_CURSOR;
 246 }
 247
 248
 249 /* ed_transpose_chars():
 250  *      Exchange the character to the left of the cursor with the one under it
 251  *      [^T] [^T]
 252  */
 253 protected el_action_t
 254 ed_transpose_chars(EditLine *el, Int c)
 255 {
 256
 257         if (el->el_line.cursor < el->el_line.lastchar) {
 258                 if (el->el_line.lastchar <= &el->el_line.buffer[1])
 259                         return CC_ERROR;
 260                 else
 261                         el->el_line.cursor++;
 262         }
 263         if (el->el_line.cursor > &el->el_line.buffer[1]) {
 264                 /* must have at least two chars entered */
 265                 c = el->el_line.cursor[-2];
 266                 el->el_line.cursor[-2] = el->el_line.cursor[-1];
 267                 el->el_line.cursor[-1] = c;
 268                 return CC_REFRESH;
 269         } else
 270                 return CC_ERROR;
 271 }
 272
 273
 274 /* ed_next_char():
 275  *      Move to the right one character
 276  *      [^F] [^F]
 277  */
 278 protected el_action_t
 279 /*ARGSUSED*/
 280 ed_next_char(EditLine *el, Int c __attribute__((__unused__)))
 281 {
 282         Char *lim = el->el_line.lastchar;
 283
 284         if (el->el_line.cursor >= lim ||
 285             (el->el_line.cursor == lim - 1 &&
 286             el->el_map.type == MAP_VI &&
 287             el->el_chared.c_vcmd.action == NOP))
 288                 return CC_ERROR;
 289
 290         el->el_line.cursor += el->el_state.argument;
 291         if (el->el_line.cursor > lim)
 292                 el->el_line.cursor = lim;
 293
 294         if (el->el_map.type == MAP_VI)
 295                 if (el->el_chared.c_vcmd.action != NOP) {
 296                         cv_delfini(el);
 297                         return CC_REFRESH;
 298                 }
 299         return CC_CURSOR;
 300 }
 301
 302
 303 /* ed_prev_word():
 304  *      Move to the beginning of the current word
 305  *      [M-b] [b]
 306  */
 307 protected el_action_t
 308 /*ARGSUSED*/
 309 ed_prev_word(EditLine *el, Int c __attribute__((__unused__)))
 310 {
 311
 312         if (el->el_line.cursor == el->el_line.buffer)
 313                 return CC_ERROR;
 314
 315         el->el_line.cursor = c__prev_word(el->el_line.cursor,
 316             el->el_line.buffer,
 317             el->el_state.argument,
 318             ce__isword);
 319
 320         if (el->el_map.type == MAP_VI)
 321                 if (el->el_chared.c_vcmd.action != NOP) {
 322                         cv_delfini(el);
 323                         return CC_REFRESH;
 324                 }
 325         return CC_CURSOR;
 326 }
 327
 328
 329 /* ed_prev_char():
 330  *      Move to the left one character
 331  *      [^B] [^B]
 332  */
 333 protected el_action_t
 334 /*ARGSUSED*/
 335 ed_prev_char(EditLine *el, Int c __attribute__((__unused__)))
 336 {
 337
 338         if (el->el_line.cursor > el->el_line.buffer) {
 339                 el->el_line.cursor -= el->el_state.argument;
 340                 if (el->el_line.cursor < el->el_line.buffer)
 341                         el->el_line.cursor = el->el_line.buffer;
 342
 343                 if (el->el_map.type == MAP_VI)
 344                         if (el->el_chared.c_vcmd.action != NOP) {
 345                                 cv_delfini(el);
 346                                 return CC_REFRESH;
 347                         }
 348                 return CC_CURSOR;
 349         } else
 350                 return CC_ERROR;
 351 }
 352
 353
 354 /* ed_quoted_insert():
 355  *      Add the next character typed verbatim
 356  *      [^V] [^V]
 357  */
 358 protected el_action_t
 359 ed_quoted_insert(EditLine *el, Int c)
 360 {
 361         int num;
 362         Char tc;
 363
 364         tty_quotemode(el);
 365         num = FUN(el,getc)(el, &tc);
 366         c = tc;
 367         tty_noquotemode(el);
 368         if (num == 1)
 369                 return ed_insert(el, c);
 370         else
 371                 return ed_end_of_file(el, 0);
 372 }
 373
 374
 375 /* ed_digit():
 376  *      Adds to argument or enters a digit
 377  */
 378 protected el_action_t
 379 ed_digit(EditLine *el, Int c)
 380 {
 381
 382         if (!Isdigit(c))
 383                 return CC_ERROR;
 384
 385         if (el->el_state.doingarg) {
 386                         /* if doing an arg, add this in... */
 387                 if (el->el_state.lastcmd == EM_UNIVERSAL_ARGUMENT)
 388                         el->el_state.argument = c - '0';
 389                 else {
 390                         if (el->el_state.argument > 1000000)
 391                                 return CC_ERROR;
 392                         el->el_state.argument =
 393                             (el->el_state.argument * 10) + (c - '0');
 394                 }
 395                 return CC_ARGHACK;
 396         }
 397
 398         return ed_insert(el, c);
 399 }
 400
 401
 402 /* ed_argument_digit():
 403  *      Digit that starts argument
 404  *      For ESC-n
 405  */
 406 protected el_action_t
 407 ed_argument_digit(EditLine *el, Int c)
 408 {
 409
 410         if (!Isdigit(c))
 411                 return CC_ERROR;
 412
 413         if (el->el_state.doingarg) {
 414                 if (el->el_state.argument > 1000000)
 415                         return CC_ERROR;
 416                 el->el_state.argument = (el->el_state.argument * 10) +
 417                     (c - '0');
 418         } else {                /* else starting an argument */
 419                 el->el_state.argument = c - '0';
 420                 el->el_state.doingarg = 1;
 421         }
 422         return CC_ARGHACK;
 423 }
 424
 425
 426 /* ed_unassigned():
 427  *      Indicates unbound character
 428  *      Bound to keys that are not assigned
 429  */
 430 protected el_action_t
 431 /*ARGSUSED*/
 432 ed_unassigned(EditLine *el __attribute__((__unused__)),
 433     Int c __attribute__((__unused__)))
 434 {
 435
 436         return CC_ERROR;
 437 }
 438
 439
 440 /**
 441  ** TTY key handling.
 442  **/
 443
 444 /* ed_tty_sigint():
 445  *      Tty interrupt character
 446  *      [^C]
 447  */
 448 protected el_action_t
 449 /*ARGSUSED*/
 450 ed_tty_sigint(EditLine *el __attribute__((__unused__)),
 451               Int c __attribute__((__unused__)))
 452 {
 453
 454         return CC_NORM;
 455 }
 456
 457
 458 /* ed_tty_dsusp():
 459  *      Tty delayed suspend character
 460  *      [^Y]
 461  */
 462 protected el_action_t
 463 /*ARGSUSED*/
 464 ed_tty_dsusp(EditLine *el __attribute__((__unused__)),
 465              Int c __attribute__((__unused__)))
 466 {
 467
 468         return CC_NORM;
 469 }
 470
 471
 472 /* ed_tty_flush_output():
 473  *      Tty flush output characters
 474  *      [^O]
 475  */
 476 protected el_action_t
 477 /*ARGSUSED*/
 478 ed_tty_flush_output(EditLine *el __attribute__((__unused__)),
 479                     Int c __attribute__((__unused__)))
 480 {
 481
 482         return CC_NORM;
 483 }
 484
 485
 486 /* ed_tty_sigquit():
 487  *      Tty quit character
 488  *      [^\]
 489  */
 490 protected el_action_t
 491 /*ARGSUSED*/
 492 ed_tty_sigquit(EditLine *el __attribute__((__unused__)),
 493                Int c __attribute__((__unused__)))
 494 {
 495
 496         return CC_NORM;
 497 }
 498
 499
 500 /* ed_tty_sigtstp():
 501  *      Tty suspend character
 502  *      [^Z]
 503  */
 504 protected el_action_t
 505 /*ARGSUSED*/
 506 ed_tty_sigtstp(EditLine *el __attribute__((__unused__)),
 507                Int c __attribute__((__unused__)))
 508 {
 509
 510         return CC_NORM;
 511 }
 512
 513
 514 /* ed_tty_stop_output():
 515  *      Tty disallow output characters
 516  *      [^S]
 517  */
 518 protected el_action_t
 519 /*ARGSUSED*/
 520 ed_tty_stop_output(EditLine *el __attribute__((__unused__)),
 521                    Int c __attribute__((__unused__)))
 522 {
 523
 524         return CC_NORM;
 525 }
 526
 527
 528 /* ed_tty_start_output():
 529  *      Tty allow output characters
 530  *      [^Q]
 531  */
 532 protected el_action_t
 533 /*ARGSUSED*/
 534 ed_tty_start_output(EditLine *el __attribute__((__unused__)),
 535                     Int c __attribute__((__unused__)))
 536 {
 537
 538         return CC_NORM;
 539 }
 540
 541
 542 /* ed_newline():
 543  *      Execute command
 544  *      [^J]
 545  */
 546 protected el_action_t
 547 /*ARGSUSED*/
 548 ed_newline(EditLine *el, Int c __attribute__((__unused__)))
 549 {
 550
 551         re_goto_bottom(el);
 552         *el->el_line.lastchar++ = '\n';
 553         *el->el_line.lastchar = '\0';
 554         return CC_NEWLINE;
 555 }
 556
 557
 558 /* ed_delete_prev_char():
 559  *      Delete the character to the left of the cursor
 560  *      [^?]
 561  */
 562 protected el_action_t
 563 /*ARGSUSED*/
 564 ed_delete_prev_char(EditLine *el, Int c __attribute__((__unused__)))
 565 {
 566
 567         if (el->el_line.cursor <= el->el_line.buffer)
 568                 return CC_ERROR;
 569
 570         c_delbefore(el, el->el_state.argument);
 571         el->el_line.cursor -= el->el_state.argument;
 572         if (el->el_line.cursor < el->el_line.buffer)
 573                 el->el_line.cursor = el->el_line.buffer;
 574         return CC_REFRESH;
 575 }
 576
 577
 578 /* ed_clear_screen():
 579  *      Clear screen leaving current line at the top
 580  *      [^L]
 581  */
 582 protected el_action_t
 583 /*ARGSUSED*/
 584 ed_clear_screen(EditLine *el, Int c __attribute__((__unused__)))
 585 {
 586
 587         terminal_clear_screen(el);      /* clear the whole real screen */
 588         re_clear_display(el);   /* reset everything */
 589         return CC_REFRESH;
 590 }
 591
 592
 593 /* ed_redisplay():
 594  *      Redisplay everything
 595  *      ^R
 596  */
 597 protected el_action_t
 598 /*ARGSUSED*/
 599 ed_redisplay(EditLine *el __attribute__((__unused__)),
 600              Int c __attribute__((__unused__)))
 601 {
 602
 603         return CC_REDISPLAY;
 604 }
 605
 606
 607 /* ed_start_over():
 608  *      Erase current line and start from scratch
 609  *      [^G]
 610  */
 611 protected el_action_t
 612 /*ARGSUSED*/
 613 ed_start_over(EditLine *el, Int c __attribute__((__unused__)))
 614 {
 615
 616         ch_reset(el, 0);
 617         return CC_REFRESH;
 618 }
 619
 620
 621 /* ed_sequence_lead_in():
 622  *      First character in a bound sequence
 623  *      Placeholder for external keys
 624  */
 625 protected el_action_t
 626 /*ARGSUSED*/
 627 ed_sequence_lead_in(EditLine *el __attribute__((__unused__)),
 628                     Int c __attribute__((__unused__)))
 629 {
 630
 631         return CC_NORM;
 632 }
 633
 634
 635 /* ed_prev_history():
 636  *      Move to the previous history line
 637  *      [^P] [k]
 638  */
 639 protected el_action_t
 640 /*ARGSUSED*/
 641 ed_prev_history(EditLine *el, Int c __attribute__((__unused__)))
 642 {
 643         char beep = 0;
 644         int sv_event = el->el_history.eventno;
 645
 646         el->el_chared.c_undo.len = -1;
 647         *el->el_line.lastchar = '\0';           /* just in case */
 648
 649         if (el->el_history.eventno == 0) {      /* save the current buffer
 650                                                  * away */
 651                 (void) Strncpy(el->el_history.buf, el->el_line.buffer,
 652                     EL_BUFSIZ);
 653                 el->el_history.last = el->el_history.buf +
 654                     (el->el_line.lastchar - el->el_line.buffer);
 655         }
 656         el->el_history.eventno += el->el_state.argument;
 657
 658         if (hist_get(el) == CC_ERROR) {
 659                 if (el->el_map.type == MAP_VI) {
 660                         el->el_history.eventno = sv_event;
 661
 662                 }
 663                 beep = 1;
 664                 /* el->el_history.eventno was fixed by first call */
 665                 (void) hist_get(el);
 666         }
 667         if (beep)
 668                 return CC_REFRESH_BEEP;
 669         return CC_REFRESH;
 670 }
 671
 672
 673 /* ed_next_history():
 674  *      Move to the next history line
 675  *      [^N] [j]
 676  */
 677 protected el_action_t
 678 /*ARGSUSED*/
 679 ed_next_history(EditLine *el, Int c __attribute__((__unused__)))
 680 {
 681         el_action_t beep = CC_REFRESH, rval;
 682
 683         el->el_chared.c_undo.len = -1;
 684         *el->el_line.lastchar = '\0';   /* just in case */
 685
 686         el->el_history.eventno -= el->el_state.argument;
 687
 688         if (el->el_history.eventno < 0) {
 689                 el->el_history.eventno = 0;
 690                 beep = CC_REFRESH_BEEP;
 691         }
 692         rval = hist_get(el);
 693         if (rval == CC_REFRESH)
 694                 return beep;
 695         return rval;
 696
 697 }
 698
 699
 700 /* ed_search_prev_history():
 701  *      Search previous in history for a line matching the current
 702  *      next search history [M-P] [K]
 703  */
 704 protected el_action_t
 705 /*ARGSUSED*/
 706 ed_search_prev_history(EditLine *el, Int c __attribute__((__unused__)))
 707 {
 708         const Char *hp;
 709         int h;
 710         bool_t found = 0;
 711
 712         el->el_chared.c_vcmd.action = NOP;
 713         el->el_chared.c_undo.len = -1;
 714         *el->el_line.lastchar = '\0';   /* just in case */
 715         if (el->el_history.eventno < 0) {
 716 #ifdef DEBUG_EDIT
 717                 (void) fprintf(el->el_errfile,
 718                     "e_prev_search_hist(): eventno < 0;\n");
 719 #endif
 720                 el->el_history.eventno = 0;
 721                 return CC_ERROR;
 722         }
 723         if (el->el_history.eventno == 0) {
 724                 (void) Strncpy(el->el_history.buf, el->el_line.buffer,
 725                     EL_BUFSIZ);
 726                 el->el_history.last = el->el_history.buf +
 727                     (el->el_line.lastchar - el->el_line.buffer);
 728         }
 729         if (el->el_history.ref == NULL)
 730                 return CC_ERROR;
 731
 732         hp = HIST_FIRST(el);
 733         if (hp == NULL)
 734                 return CC_ERROR;
 735
 736         c_setpat(el);           /* Set search pattern !! */
 737
 738         for (h = 1; h <= el->el_history.eventno; h++)
 739                 hp = HIST_NEXT(el);
 740
 741         while (hp != NULL) {
 742 #ifdef SDEBUG
 743                 (void) fprintf(el->el_errfile, "Comparing with \"%s\"\n", hp);
 744 #endif
 745                 if ((Strncmp(hp, el->el_line.buffer, (size_t)
 746                             (el->el_line.lastchar - el->el_line.buffer)) ||
 747                         hp[el->el_line.lastchar - el->el_line.buffer]) &&
 748                     c_hmatch(el, hp)) {
 749                         found++;
 750                         break;
 751                 }
 752                 h++;
 753                 hp = HIST_NEXT(el);
 754         }
 755
 756         if (!found) {
 757 #ifdef SDEBUG
 758                 (void) fprintf(el->el_errfile, "not found\n");
 759 #endif
 760                 return CC_ERROR;
 761         }
 762         el->el_history.eventno = h;
 763
 764         return hist_get(el);
 765 }
 766
 767
 768 /* ed_search_next_history():
 769  *      Search next in history for a line matching the current
 770  *      [M-N] [J]
 771  */
 772 protected el_action_t
 773 /*ARGSUSED*/
 774 ed_search_next_history(EditLine *el, Int c __attribute__((__unused__)))
 775 {
 776         const Char *hp;
 777         int h;
 778         bool_t found = 0;
 779
 780         el->el_chared.c_vcmd.action = NOP;
 781         el->el_chared.c_undo.len = -1;
 782         *el->el_line.lastchar = '\0';   /* just in case */
 783
 784         if (el->el_history.eventno == 0)
 785                 return CC_ERROR;
 786
 787         if (el->el_history.ref == NULL)
 788                 return CC_ERROR;
 789
 790         hp = HIST_FIRST(el);
 791         if (hp == NULL)
 792                 return CC_ERROR;
 793
 794         c_setpat(el);           /* Set search pattern !! */
 795
 796         for (h = 1; h < el->el_history.eventno && hp; h++) {
 797 #ifdef SDEBUG
 798                 (void) fprintf(el->el_errfile, "Comparing with \"%s\"\n", hp);
 799 #endif
 800                 if ((Strncmp(hp, el->el_line.buffer, (size_t)
 801                             (el->el_line.lastchar - el->el_line.buffer)) ||
 802                         hp[el->el_line.lastchar - el->el_line.buffer]) &&
 803                     c_hmatch(el, hp))
 804                         found = h;
 805                 hp = HIST_NEXT(el);
 806         }
 807
 808         if (!found) {           /* is it the current history number? */
 809                 if (!c_hmatch(el, el->el_history.buf)) {
 810 #ifdef SDEBUG
 811                         (void) fprintf(el->el_errfile, "not found\n");
 812 #endif
 813                         return CC_ERROR;
 814                 }
 815         }
 816         el->el_history.eventno = found;
 817
 818         return hist_get(el);
 819 }
 820
 821
 822 /* ed_prev_line():
 823  *      Move up one line
 824  *      Could be [k] [^p]
 825  */
 826 protected el_action_t
 827 /*ARGSUSED*/
 828 ed_prev_line(EditLine *el, Int c __attribute__((__unused__)))
 829 {
 830         Char *ptr;
 831         int nchars = c_hpos(el);
 832
 833         /*
 834          * Move to the line requested
 835          */
 836         if (*(ptr = el->el_line.cursor) == '\n')
 837                 ptr--;
 838
 839         for (; ptr >= el->el_line.buffer; ptr--)
 840                 if (*ptr == '\n' && --el->el_state.argument <= 0)
 841                         break;
 842
 843         if (el->el_state.argument > 0)
 844                 return CC_ERROR;
 845
 846         /*
 847          * Move to the beginning of the line
 848          */
 849         for (ptr--; ptr >= el->el_line.buffer && *ptr != '\n'; ptr--)
 850                 continue;
 851
 852         /*
 853          * Move to the character requested
 854          */
 855         for (ptr++;
 856             nchars-- > 0 && ptr < el->el_line.lastchar && *ptr != '\n';
 857             ptr++)
 858                 continue;
 859
 860         el->el_line.cursor = ptr;
 861         return CC_CURSOR;
 862 }
 863
 864
 865 /* ed_next_line():
 866  *      Move down one line
 867  *      Could be [j] [^n]
 868  */
 869 protected el_action_t
 870 /*ARGSUSED*/
 871 ed_next_line(EditLine *el, Int c __attribute__((__unused__)))
 872 {
 873         Char *ptr;
 874         int nchars = c_hpos(el);
 875
 876         /*
 877          * Move to the line requested
 878          */
 879         for (ptr = el->el_line.cursor; ptr < el->el_line.lastchar; ptr++)
 880                 if (*ptr == '\n' && --el->el_state.argument <= 0)
 881                         break;
 882
 883         if (el->el_state.argument > 0)
 884                 return CC_ERROR;
 885
 886         /*
 887          * Move to the character requested
 888          */
 889         for (ptr++;
 890             nchars-- > 0 && ptr < el->el_line.lastchar && *ptr != '\n';
 891             ptr++)
 892                 continue;
 893
 894         el->el_line.cursor = ptr;
 895         return CC_CURSOR;
 896 }
 897
 898
 899 /* ed_command():
 900  *      Editline extended command
 901  *      [M-X] [:]
 902  */
 903 protected el_action_t
 904 /*ARGSUSED*/
 905 ed_command(EditLine *el, Int c __attribute__((__unused__)))
 906 {
 907         Char tmpbuf[EL_BUFSIZ];
 908         int tmplen;
 909
 910         tmplen = c_gets(el, tmpbuf, STR("\n: "));
 911         terminal__putc(el, '\n');
 912
 913         if (tmplen < 0 || (tmpbuf[tmplen] = 0, parse_line(el, tmpbuf)) == -1)
 914                 terminal_beep(el);
 915
 916         el->el_map.current = el->el_map.key;
 917         re_clear_display(el);
 918         return CC_REFRESH;
 919 }