lib/libedit/common.c

   1 /*-
   2  * Copyright (c) 1992, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Christos Zoulas of Cornell University.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  * @(#)common.c 8.1 (Berkeley) 6/4/93
  33  * $NetBSD: common.c,v 1.16 2003/08/07 16:44:30 agc Exp $
  34  * $DragonFly: src/lib/libedit/common.c,v 1.5 2005/11/13 11:58:30 corecode Exp $
  35  */
  36
  37 #include "config.h"
  38
  39 /*
  40  * common.c: Common Editor functions
  41  */
  42 #include "el.h"
  43
  44 /* ed_end_of_file():
  45  *      Indicate end of file
  46  *      [^D]
  47  */
  48 protected el_action_t
  49 /*ARGSUSED*/
  50 ed_end_of_file(EditLine *el, int c __attribute__((__unused__)))
  51 {
  52
  53         re_goto_bottom(el);
  54         *el->el_line.lastchar = '\0';
  55         return (CC_EOF);
  56 }
  57
  58
  59 /* ed_insert():
  60  *      Add character to the line
  61  *      Insert a character [bound to all insert keys]
  62  */
  63 protected el_action_t
  64 ed_insert(EditLine *el, int c)
  65 {
  66         int count = el->el_state.argument;
  67
  68         if (c == '\0')
  69                 return (CC_ERROR);
  70
  71         if (el->el_line.lastchar + el->el_state.argument >=
  72             el->el_line.limit) {
  73                 /* end of buffer space, try to allocate more */
  74                 if (!ch_enlargebufs(el, (size_t) count))
  75                         return CC_ERROR;        /* error allocating more */
  76         }
  77
  78         if (count == 1) {
  79                 if (el->el_state.inputmode == MODE_INSERT
  80                     || el->el_line.cursor >= el->el_line.lastchar)
  81                         c_insert(el, 1);
  82
  83                 *el->el_line.cursor++ = c;
  84                 re_fastaddc(el);                /* fast refresh for one char. */
  85         } else {
  86                 if (el->el_state.inputmode != MODE_REPLACE_1)
  87                         c_insert(el, el->el_state.argument);
  88
  89                 while (count-- && el->el_line.cursor < el->el_line.lastchar)
  90                         *el->el_line.cursor++ = c;
  91                 re_refresh(el);
  92         }
  93
  94         if (el->el_state.inputmode == MODE_REPLACE_1)
  95                 return vi_command_mode(el, 0);
  96
  97         return (CC_NORM);
  98 }
  99
 100
 101 /* ed_delete_prev_word():
 102  *      Delete from beginning of current word to cursor
 103  *      [M-^?] [^W]
 104  */
 105 protected el_action_t
 106 /*ARGSUSED*/
 107 ed_delete_prev_word(EditLine *el, int c __attribute__((__unused__)))
 108 {
 109         char *cp, *p, *kp;
 110
 111         if (el->el_line.cursor == el->el_line.buffer)
 112                 return (CC_ERROR);
 113
 114         cp = c__prev_word(el->el_line.cursor, el->el_line.buffer,
 115             el->el_state.argument, ce__isword);
 116
 117         for (p = cp, kp = el->el_chared.c_kill.buf; p < el->el_line.cursor; p++)
 118                 *kp++ = *p;
 119         el->el_chared.c_kill.last = kp;
 120
 121         c_delbefore(el, el->el_line.cursor - cp);       /* delete before dot */
 122         el->el_line.cursor = cp;
 123         if (el->el_line.cursor < el->el_line.buffer)
 124                 el->el_line.cursor = el->el_line.buffer; /* bounds check */
 125         return (CC_REFRESH);
 126 }
 127
 128
 129 /* ed_delete_next_char():
 130  *      Delete character under cursor
 131  *      [^D] [x]
 132  */
 133 protected el_action_t
 134 /*ARGSUSED*/
 135 ed_delete_next_char(EditLine *el, int c __attribute__((__unused__)))
 136 {
 137 #ifdef notdef                   /* XXX */
 138 #define EL      el->el_line
 139         (void) fprintf(el->el_errlfile,
 140             "\nD(b: %x(%s)  c: %x(%s) last: %x(%s) limit: %x(%s)\n",
 141             EL.buffer, EL.buffer, EL.cursor, EL.cursor, EL.lastchar,
 142             EL.lastchar, EL.limit, EL.limit);
 143 #endif
 144         if (el->el_line.cursor == el->el_line.lastchar) {
 145                         /* if I'm at the end */
 146                 if (el->el_map.type == MAP_VI) {
 147                         if (el->el_line.cursor == el->el_line.buffer) {
 148                                 /* if I'm also at the beginning */
 149 #ifdef KSHVI
 150                                 return (CC_ERROR);
 151 #else
 152                                 term_overwrite(el, STReof, 4);
 153                                         /* then do a EOF */
 154                                 term__flush();
 155                                 return (CC_EOF);
 156 #endif
 157                         } else {
 158 #ifdef KSHVI
 159                                 el->el_line.cursor--;
 160 #else
 161                                 return (CC_ERROR);
 162 #endif
 163                         }
 164                 } else {
 165                         if (el->el_line.cursor != el->el_line.buffer)
 166                                 el->el_line.cursor--;
 167                         else
 168                                 return (CC_ERROR);
 169                 }
 170         }
 171         c_delafter(el, el->el_state.argument);  /* delete after dot */
 172         if (el->el_line.cursor >= el->el_line.lastchar &&
 173             el->el_line.cursor > el->el_line.buffer)
 174                         /* bounds check */
 175                 el->el_line.cursor = el->el_line.lastchar - 1;
 176         return (CC_REFRESH);
 177 }
 178
 179
 180 /* ed_kill_line():
 181  *      Cut to the end of line
 182  *      [^K] [^K]
 183  */
 184 protected el_action_t
 185 /*ARGSUSED*/
 186 ed_kill_line(EditLine *el, int c __attribute__((__unused__)))
 187 {
 188         char *kp, *cp;
 189
 190         cp = el->el_line.cursor;
 191         kp = el->el_chared.c_kill.buf;
 192         while (cp < el->el_line.lastchar)
 193                 *kp++ = *cp++;  /* copy it */
 194         el->el_chared.c_kill.last = kp;
 195                         /* zap! -- delete to end */
 196         el->el_line.lastchar = el->el_line.cursor;
 197         return (CC_REFRESH);
 198 }
 199
 200
 201 /* ed_move_to_end():
 202  *      Move cursor to the end of line
 203  *      [^E] [^E]
 204  */
 205 protected el_action_t
 206 /*ARGSUSED*/
 207 ed_move_to_end(EditLine *el, int c __attribute__((__unused__)))
 208 {
 209
 210         el->el_line.cursor = el->el_line.lastchar;
 211         if (el->el_map.type == MAP_VI) {
 212 #ifdef VI_MOVE
 213                 el->el_line.cursor--;
 214 #endif
 215                 if (el->el_chared.c_vcmd.action != NOP) {
 216                         cv_delfini(el);
 217                         return (CC_REFRESH);
 218                 }
 219         }
 220         return (CC_CURSOR);
 221 }
 222
 223
 224 /* ed_move_to_beg():
 225  *      Move cursor to the beginning of line
 226  *      [^A] [^A]
 227  */
 228 protected el_action_t
 229 /*ARGSUSED*/
 230 ed_move_to_beg(EditLine *el, int c __attribute__((__unused__)))
 231 {
 232
 233         el->el_line.cursor = el->el_line.buffer;
 234
 235         if (el->el_map.type == MAP_VI) {
 236                         /* We want FIRST non space character */
 237                 while (isspace((unsigned char) *el->el_line.cursor))
 238                         el->el_line.cursor++;
 239                 if (el->el_chared.c_vcmd.action != NOP) {
 240                         cv_delfini(el);
 241                         return (CC_REFRESH);
 242                 }
 243         }
 244         return (CC_CURSOR);
 245 }
 246
 247
 248 /* ed_transpose_chars():
 249  *      Exchange the character to the left of the cursor with the one under it
 250  *      [^T] [^T]
 251  */
 252 protected el_action_t
 253 ed_transpose_chars(EditLine *el, int c)
 254 {
 255
 256         if (el->el_line.cursor < el->el_line.lastchar) {
 257                 if (el->el_line.lastchar <= &el->el_line.buffer[1])
 258                         return (CC_ERROR);
 259                 else
 260                         el->el_line.cursor++;
 261         }
 262         if (el->el_line.cursor > &el->el_line.buffer[1]) {
 263                 /* must have at least two chars entered */
 264                 c = el->el_line.cursor[-2];
 265                 el->el_line.cursor[-2] = el->el_line.cursor[-1];
 266                 el->el_line.cursor[-1] = c;
 267                 return (CC_REFRESH);
 268         } else
 269                 return (CC_ERROR);
 270 }
 271
 272
 273 /* ed_next_char():
 274  *      Move to the right one character
 275  *      [^F] [^F]
 276  */
 277 protected el_action_t
 278 /*ARGSUSED*/
 279 ed_next_char(EditLine *el, int c __attribute__((__unused__)))
 280 {
 281         char *lim = el->el_line.lastchar;
 282
 283         if (el->el_line.cursor >= lim ||
 284             (el->el_line.cursor == lim - 1 &&
 285             el->el_map.type == MAP_VI &&
 286             el->el_chared.c_vcmd.action == NOP))
 287                 return (CC_ERROR);
 288
 289         el->el_line.cursor += el->el_state.argument;
 290         if (el->el_line.cursor > lim)
 291                 el->el_line.cursor = lim;
 292
 293         if (el->el_map.type == MAP_VI)
 294                 if (el->el_chared.c_vcmd.action != NOP) {
 295                         cv_delfini(el);
 296                         return (CC_REFRESH);
 297                 }
 298         return (CC_CURSOR);
 299 }
 300
 301
 302 /* ed_prev_word():
 303  *      Move to the beginning of the current word
 304  *      [M-b] [b]
 305  */
 306 protected el_action_t
 307 /*ARGSUSED*/
 308 ed_prev_word(EditLine *el, int c __attribute__((__unused__)))
 309 {
 310
 311         if (el->el_line.cursor == el->el_line.buffer)
 312                 return (CC_ERROR);
 313
 314         el->el_line.cursor = c__prev_word(el->el_line.cursor,
 315             el->el_line.buffer,
 316             el->el_state.argument,
 317             ce__isword);
 318
 319         if (el->el_map.type == MAP_VI)
 320                 if (el->el_chared.c_vcmd.action != NOP) {
 321                         cv_delfini(el);
 322                         return (CC_REFRESH);
 323                 }
 324         return (CC_CURSOR);
 325 }
 326
 327
 328 /* ed_prev_char():
 329  *      Move to the left one character
 330  *      [^B] [^B]
 331  */
 332 protected el_action_t
 333 /*ARGSUSED*/
 334 ed_prev_char(EditLine *el, int c __attribute__((__unused__)))
 335 {
 336
 337         if (el->el_line.cursor > el->el_line.buffer) {
 338                 el->el_line.cursor -= el->el_state.argument;
 339                 if (el->el_line.cursor < el->el_line.buffer)
 340                         el->el_line.cursor = el->el_line.buffer;
 341
 342                 if (el->el_map.type == MAP_VI)
 343                         if (el->el_chared.c_vcmd.action != NOP) {
 344                                 cv_delfini(el);
 345                                 return (CC_REFRESH);
 346                         }
 347                 return (CC_CURSOR);
 348         } else
 349                 return (CC_ERROR);
 350 }
 351
 352
 353 /* ed_quoted_insert():
 354  *      Add the next character typed verbatim
 355  *      [^V] [^V]
 356  */
 357 protected el_action_t
 358 ed_quoted_insert(EditLine *el, int c)
 359 {
 360         int num;
 361         char tc;
 362
 363         tty_quotemode(el);
 364         num = el_getc(el, &tc);
 365         c = (unsigned char) tc;
 366         tty_noquotemode(el);
 367         if (num == 1)
 368                 return (ed_insert(el, c));
 369         else
 370                 return (ed_end_of_file(el, 0));
 371 }
 372
 373
 374 /* ed_digit():
 375  *      Adds to argument or enters a digit
 376  */
 377 protected el_action_t
 378 ed_digit(EditLine *el, int c)
 379 {
 380
 381         if (!isdigit(c))
 382                 return (CC_ERROR);
 383
 384         if (el->el_state.doingarg) {
 385                         /* if doing an arg, add this in... */
 386                 if (el->el_state.lastcmd == EM_UNIVERSAL_ARGUMENT)
 387                         el->el_state.argument = c - '0';
 388                 else {
 389                         if (el->el_state.argument > 1000000)
 390                                 return (CC_ERROR);
 391                         el->el_state.argument =
 392                             (el->el_state.argument * 10) + (c - '0');
 393                 }
 394                 return (CC_ARGHACK);
 395         }
 396
 397         return ed_insert(el, c);
 398 }
 399
 400
 401 /* ed_argument_digit():
 402  *      Digit that starts argument
 403  *      For ESC-n
 404  */
 405 protected el_action_t
 406 ed_argument_digit(EditLine *el, int c)
 407 {
 408
 409         if (!isdigit(c))
 410                 return (CC_ERROR);
 411
 412         if (el->el_state.doingarg) {
 413                 if (el->el_state.argument > 1000000)
 414                         return (CC_ERROR);
 415                 el->el_state.argument = (el->el_state.argument * 10) +
 416                     (c - '0');
 417         } else {                /* else starting an argument */
 418                 el->el_state.argument = c - '0';
 419                 el->el_state.doingarg = 1;
 420         }
 421         return (CC_ARGHACK);
 422 }
 423
 424
 425 /* ed_unassigned():
 426  *      Indicates unbound character
 427  *      Bound to keys that are not assigned
 428  */
 429 protected el_action_t
 430 /*ARGSUSED*/
 431 ed_unassigned(EditLine *el, int c __attribute__((__unused__)))
 432 {
 433
 434         return (CC_ERROR);
 435 }
 436
 437
 438 /**
 439  ** TTY key handling.
 440  **/
 441
 442 /* ed_tty_sigint():
 443  *      Tty interrupt character
 444  *      [^C]
 445  */
 446 protected el_action_t
 447 /*ARGSUSED*/
 448 ed_tty_sigint(EditLine *el __attribute__((__unused__)),
 449               int c __attribute__((__unused__)))
 450 {
 451
 452         return (CC_NORM);
 453 }
 454
 455
 456 /* ed_tty_dsusp():
 457  *      Tty delayed suspend character
 458  *      [^Y]
 459  */
 460 protected el_action_t
 461 /*ARGSUSED*/
 462 ed_tty_dsusp(EditLine *el __attribute__((__unused__)),
 463              int c __attribute__((__unused__)))
 464 {
 465
 466         return (CC_NORM);
 467 }
 468
 469
 470 /* ed_tty_flush_output():
 471  *      Tty flush output characters
 472  *      [^O]
 473  */
 474 protected el_action_t
 475 /*ARGSUSED*/
 476 ed_tty_flush_output(EditLine *el __attribute__((__unused__)),
 477                     int c __attribute__((__unused__)))
 478 {
 479
 480         return (CC_NORM);
 481 }
 482
 483
 484 /* ed_tty_sigquit():
 485  *      Tty quit character
 486  *      [^\]
 487  */
 488 protected el_action_t
 489 /*ARGSUSED*/
 490 ed_tty_sigquit(EditLine *el __attribute__((__unused__)),
 491                int c __attribute__((__unused__)))
 492 {
 493
 494         return (CC_NORM);
 495 }
 496
 497
 498 /* ed_tty_sigtstp():
 499  *      Tty suspend character
 500  *      [^Z]
 501  */
 502 protected el_action_t
 503 /*ARGSUSED*/
 504 ed_tty_sigtstp(EditLine *el __attribute__((__unused__)),
 505                int c __attribute__((__unused__)))
 506 {
 507
 508         return (CC_NORM);
 509 }
 510
 511
 512 /* ed_tty_stop_output():
 513  *      Tty disallow output characters
 514  *      [^S]
 515  */
 516 protected el_action_t
 517 /*ARGSUSED*/
 518 ed_tty_stop_output(EditLine *el __attribute__((__unused__)),
 519                    int c __attribute__((__unused__)))
 520 {
 521
 522         return (CC_NORM);
 523 }
 524
 525
 526 /* ed_tty_start_output():
 527  *      Tty allow output characters
 528  *      [^Q]
 529  */
 530 protected el_action_t
 531 /*ARGSUSED*/
 532 ed_tty_start_output(EditLine *el __attribute__((__unused__)),
 533                     int c __attribute__((__unused__)))
 534 {
 535
 536         return (CC_NORM);
 537 }
 538
 539
 540 /* ed_newline():
 541  *      Execute command
 542  *      [^J]
 543  */
 544 protected el_action_t
 545 /*ARGSUSED*/
 546 ed_newline(EditLine *el, int c __attribute__((__unused__)))
 547 {
 548
 549         re_goto_bottom(el);
 550         *el->el_line.lastchar++ = '\n';
 551         *el->el_line.lastchar = '\0';
 552         return (CC_NEWLINE);
 553 }
 554
 555
 556 /* ed_delete_prev_char():
 557  *      Delete the character to the left of the cursor
 558  *      [^?]
 559  */
 560 protected el_action_t
 561 /*ARGSUSED*/
 562 ed_delete_prev_char(EditLine *el, int c __attribute__((__unused__)))
 563 {
 564
 565         if (el->el_line.cursor <= el->el_line.buffer)
 566                 return (CC_ERROR);
 567
 568         c_delbefore(el, el->el_state.argument);
 569         el->el_line.cursor -= el->el_state.argument;
 570         if (el->el_line.cursor < el->el_line.buffer)
 571                 el->el_line.cursor = el->el_line.buffer;
 572         return (CC_REFRESH);
 573 }
 574
 575
 576 /* ed_clear_screen():
 577  *      Clear screen leaving current line at the top
 578  *      [^L]
 579  */
 580 protected el_action_t
 581 /*ARGSUSED*/
 582 ed_clear_screen(EditLine *el, int c __attribute__((__unused__)))
 583 {
 584
 585         term_clear_screen(el);  /* clear the whole real screen */
 586         re_clear_display(el);   /* reset everything */
 587         return (CC_REFRESH);
 588 }
 589
 590
 591 /* ed_redisplay():
 592  *      Redisplay everything
 593  *      ^R
 594  */
 595 protected el_action_t
 596 /*ARGSUSED*/
 597 ed_redisplay(EditLine *el __attribute__((__unused__)),
 598              int c __attribute__((__unused__)))
 599 {
 600
 601         return (CC_REDISPLAY);
 602 }
 603
 604
 605 /* ed_start_over():
 606  *      Erase current line and start from scratch
 607  *      [^G]
 608  */
 609 protected el_action_t
 610 /*ARGSUSED*/
 611 ed_start_over(EditLine *el, int c __attribute__((__unused__)))
 612 {
 613
 614         ch_reset(el);
 615         return (CC_REFRESH);
 616 }
 617
 618
 619 /* ed_sequence_lead_in():
 620  *      First character in a bound sequence
 621  *      Placeholder for external keys
 622  */
 623 protected el_action_t
 624 /*ARGSUSED*/
 625 ed_sequence_lead_in(EditLine *el __attribute__((__unused__)),
 626                     int c __attribute__((__unused__)))
 627 {
 628
 629         return (CC_NORM);
 630 }
 631
 632
 633 /* ed_prev_history():
 634  *      Move to the previous history line
 635  *      [^P] [k]
 636  */
 637 protected el_action_t
 638 /*ARGSUSED*/
 639 ed_prev_history(EditLine *el, int c __attribute__((__unused__)))
 640 {
 641         char beep = 0;
 642         int sv_event = el->el_history.eventno;
 643
 644         el->el_chared.c_undo.len = -1;
 645         *el->el_line.lastchar = '\0';           /* just in case */
 646
 647         if (el->el_history.eventno == 0) {      /* save the current buffer
 648                                                  * away */
 649                 (void) strncpy(el->el_history.buf, el->el_line.buffer,
 650                     EL_BUFSIZ);
 651                 el->el_history.last = el->el_history.buf +
 652                     (el->el_line.lastchar - el->el_line.buffer);
 653         }
 654         el->el_history.eventno += el->el_state.argument;
 655
 656         if (hist_get(el) == CC_ERROR) {
 657                 if (el->el_map.type == MAP_VI) {
 658                         el->el_history.eventno = sv_event;
 659                         return CC_ERROR;
 660                 }
 661                 beep = 1;
 662                 /* el->el_history.eventno was fixed by first call */
 663                 (void) hist_get(el);
 664         }
 665         if (beep)
 666                 return CC_REFRESH_BEEP;
 667         return CC_REFRESH;
 668 }
 669
 670
 671 /* ed_next_history():
 672  *      Move to the next history line
 673  *      [^N] [j]
 674  */
 675 protected el_action_t
 676 /*ARGSUSED*/
 677 ed_next_history(EditLine *el, int c __attribute__((__unused__)))
 678 {
 679         el_action_t beep = CC_REFRESH, rval;
 680
 681         el->el_chared.c_undo.len = -1;
 682         *el->el_line.lastchar = '\0';   /* just in case */
 683
 684         el->el_history.eventno -= el->el_state.argument;
 685
 686         if (el->el_history.eventno < 0) {
 687                 el->el_history.eventno = 0;
 688                 beep = CC_REFRESH_BEEP;
 689         }
 690         rval = hist_get(el);
 691         if (rval == CC_REFRESH)
 692                 return beep;
 693         return rval;
 694
 695 }
 696
 697
 698 /* ed_search_prev_history():
 699  *      Search previous in history for a line matching the current
 700  *      next search history [M-P] [K]
 701  */
 702 protected el_action_t
 703 /*ARGSUSED*/
 704 ed_search_prev_history(EditLine *el, int c __attribute__((__unused__)))
 705 {
 706         const char *hp;
 707         int h;
 708         bool_t found = 0;
 709
 710         el->el_chared.c_vcmd.action = NOP;
 711         el->el_chared.c_undo.len = -1;
 712         *el->el_line.lastchar = '\0';   /* just in case */
 713         if (el->el_history.eventno < 0) {
 714 #ifdef DEBUG_EDIT
 715                 (void) fprintf(el->el_errfile,
 716                     "e_prev_search_hist(): eventno < 0;\n");
 717 #endif
 718                 el->el_history.eventno = 0;
 719                 return (CC_ERROR);
 720         }
 721         if (el->el_history.eventno == 0) {
 722                 (void) strncpy(el->el_history.buf, el->el_line.buffer,
 723                     EL_BUFSIZ);
 724                 el->el_history.last = el->el_history.buf +
 725                     (el->el_line.lastchar - el->el_line.buffer);
 726         }
 727         if (el->el_history.ref == NULL)
 728                 return (CC_ERROR);
 729
 730         hp = HIST_FIRST(el);
 731         if (hp == NULL)
 732                 return (CC_ERROR);
 733
 734         c_setpat(el);           /* Set search pattern !! */
 735
 736         for (h = 1; h <= el->el_history.eventno; h++)
 737                 hp = HIST_NEXT(el);
 738
 739         while (hp != NULL) {
 740 #ifdef SDEBUG
 741                 (void) fprintf(el->el_errfile, "Comparing with \"%s\"\n", hp);
 742 #endif
 743                 if ((strncmp(hp, el->el_line.buffer, (size_t)
 744                             (el->el_line.lastchar - el->el_line.buffer)) ||
 745                         hp[el->el_line.lastchar - el->el_line.buffer]) &&
 746                     c_hmatch(el, hp)) {
 747                         found++;
 748                         break;
 749                 }
 750                 h++;
 751                 hp = HIST_NEXT(el);
 752         }
 753
 754         if (!found) {
 755 #ifdef SDEBUG
 756                 (void) fprintf(el->el_errfile, "not found\n");
 757 #endif
 758                 return (CC_ERROR);
 759         }
 760         el->el_history.eventno = h;
 761
 762         return (hist_get(el));
 763 }
 764
 765
 766 /* ed_search_next_history():
 767  *      Search next in history for a line matching the current
 768  *      [M-N] [J]
 769  */
 770 protected el_action_t
 771 /*ARGSUSED*/
 772 ed_search_next_history(EditLine *el, int c __attribute__((__unused__)))
 773 {
 774         const char *hp;
 775         int h;
 776         bool_t found = 0;
 777
 778         el->el_chared.c_vcmd.action = NOP;
 779         el->el_chared.c_undo.len = -1;
 780         *el->el_line.lastchar = '\0';   /* just in case */
 781
 782         if (el->el_history.eventno == 0)
 783                 return (CC_ERROR);
 784
 785         if (el->el_history.ref == NULL)
 786                 return (CC_ERROR);
 787
 788         hp = HIST_FIRST(el);
 789         if (hp == NULL)
 790                 return (CC_ERROR);
 791
 792         c_setpat(el);           /* Set search pattern !! */
 793
 794         for (h = 1; h < el->el_history.eventno && hp; h++) {
 795 #ifdef SDEBUG
 796                 (void) fprintf(el->el_errfile, "Comparing with \"%s\"\n", hp);
 797 #endif
 798                 if ((strncmp(hp, el->el_line.buffer, (size_t)
 799                             (el->el_line.lastchar - el->el_line.buffer)) ||
 800                         hp[el->el_line.lastchar - el->el_line.buffer]) &&
 801                     c_hmatch(el, hp))
 802                         found = h;
 803                 hp = HIST_NEXT(el);
 804         }
 805
 806         if (!found) {           /* is it the current history number? */
 807                 if (!c_hmatch(el, el->el_history.buf)) {
 808 #ifdef SDEBUG
 809                         (void) fprintf(el->el_errfile, "not found\n");
 810 #endif
 811                         return (CC_ERROR);
 812                 }
 813         }
 814         el->el_history.eventno = found;
 815
 816         return (hist_get(el));
 817 }
 818
 819
 820 /* ed_prev_line():
 821  *      Move up one line
 822  *      Could be [k] [^p]
 823  */
 824 protected el_action_t
 825 /*ARGSUSED*/
 826 ed_prev_line(EditLine *el, int c __attribute__((__unused__)))
 827 {
 828         char *ptr;
 829         int nchars = c_hpos(el);
 830
 831         /*
 832          * Move to the line requested
 833          */
 834         if (*(ptr = el->el_line.cursor) == '\n')
 835                 ptr--;
 836
 837         for (; ptr >= el->el_line.buffer; ptr--)
 838                 if (*ptr == '\n' && --el->el_state.argument <= 0)
 839                         break;
 840
 841         if (el->el_state.argument > 0)
 842                 return (CC_ERROR);
 843
 844         /*
 845          * Move to the beginning of the line
 846          */
 847         for (ptr--; ptr >= el->el_line.buffer && *ptr != '\n'; ptr--)
 848                 continue;
 849
 850         /*
 851          * Move to the character requested
 852          */
 853         for (ptr++;
 854             nchars-- > 0 && ptr < el->el_line.lastchar && *ptr != '\n';
 855             ptr++)
 856                 continue;
 857
 858         el->el_line.cursor = ptr;
 859         return (CC_CURSOR);
 860 }
 861
 862
 863 /* ed_next_line():
 864  *      Move down one line
 865  *      Could be [j] [^n]
 866  */
 867 protected el_action_t
 868 /*ARGSUSED*/
 869 ed_next_line(EditLine *el, int c __attribute__((__unused__)))
 870 {
 871         char *ptr;
 872         int nchars = c_hpos(el);
 873
 874         /*
 875          * Move to the line requested
 876          */
 877         for (ptr = el->el_line.cursor; ptr < el->el_line.lastchar; ptr++)
 878                 if (*ptr == '\n' && --el->el_state.argument <= 0)
 879                         break;
 880
 881         if (el->el_state.argument > 0)
 882                 return (CC_ERROR);
 883
 884         /*
 885          * Move to the character requested
 886          */
 887         for (ptr++;
 888             nchars-- > 0 && ptr < el->el_line.lastchar && *ptr != '\n';
 889             ptr++)
 890                 continue;
 891
 892         el->el_line.cursor = ptr;
 893         return (CC_CURSOR);
 894 }
 895
 896
 897 /* ed_command():
 898  *      Editline extended command
 899  *      [M-X] [:]
 900  */
 901 protected el_action_t
 902 /*ARGSUSED*/
 903 ed_command(EditLine *el, int c __attribute__((__unused__)))
 904 {
 905         char tmpbuf[EL_BUFSIZ];
 906         int tmplen;
 907
 908         tmplen = c_gets(el, tmpbuf, "\n: ");
 909         term__putc('\n');
 910
 911         if (tmplen < 0 || (tmpbuf[tmplen] = 0, parse_line(el, tmpbuf)) == -1)
 912                 term_beep(el);
 913
 914         el->el_map.current = el->el_map.key;
 915         re_clear_display(el);
 916         return CC_REFRESH;
 917 }