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 1.19 2006/03/06 21:11:56 christos Exp $
  34  * $DragonFly: src/lib/libedit/common.c,v 1.6 2007/05/05 00:27:39 pavalos 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)
 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                                 /* then do an EOF */
 153                                 term_writechar(el, c);
 154                                 return (CC_EOF);
 155 #endif
 156                         } else {
 157 #ifdef KSHVI
 158                                 el->el_line.cursor--;
 159 #else
 160                                 return (CC_ERROR);
 161 #endif
 162                         }
 163                 } else {
 164                         if (el->el_line.cursor != el->el_line.buffer)
 165                                 el->el_line.cursor--;
 166                         else
 167                                 return (CC_ERROR);
 168                 }
 169         }
 170         c_delafter(el, el->el_state.argument);  /* delete after dot */
 171         if (el->el_line.cursor >= el->el_line.lastchar &&
 172             el->el_line.cursor > el->el_line.buffer)
 173                         /* bounds check */
 174                 el->el_line.cursor = el->el_line.lastchar - 1;
 175         return (CC_REFRESH);
 176 }
 177
 178
 179 /* ed_kill_line():
 180  *      Cut to the end of line
 181  *      [^K] [^K]
 182  */
 183 protected el_action_t
 184 /*ARGSUSED*/
 185 ed_kill_line(EditLine *el, int c __attribute__((__unused__)))
 186 {
 187         char *kp, *cp;
 188
 189         cp = el->el_line.cursor;
 190         kp = el->el_chared.c_kill.buf;
 191         while (cp < el->el_line.lastchar)
 192                 *kp++ = *cp++;  /* copy it */
 193         el->el_chared.c_kill.last = kp;
 194                         /* zap! -- delete to end */
 195         el->el_line.lastchar = el->el_line.cursor;
 196         return (CC_REFRESH);
 197 }
 198
 199
 200 /* ed_move_to_end():
 201  *      Move cursor to the end of line
 202  *      [^E] [^E]
 203  */
 204 protected el_action_t
 205 /*ARGSUSED*/
 206 ed_move_to_end(EditLine *el, int c __attribute__((__unused__)))
 207 {
 208
 209         el->el_line.cursor = el->el_line.lastchar;
 210         if (el->el_map.type == MAP_VI) {
 211 #ifdef VI_MOVE
 212                 el->el_line.cursor--;
 213 #endif
 214                 if (el->el_chared.c_vcmd.action != NOP) {
 215                         cv_delfini(el);
 216                         return (CC_REFRESH);
 217                 }
 218         }
 219         return (CC_CURSOR);
 220 }
 221
 222
 223 /* ed_move_to_beg():
 224  *      Move cursor to the beginning of line
 225  *      [^A] [^A]
 226  */
 227 protected el_action_t
 228 /*ARGSUSED*/
 229 ed_move_to_beg(EditLine *el, int c __attribute__((__unused__)))
 230 {
 231
 232         el->el_line.cursor = el->el_line.buffer;
 233
 234         if (el->el_map.type == MAP_VI) {
 235                         /* We want FIRST non space character */
 236                 while (isspace((unsigned char) *el->el_line.cursor))
 237                         el->el_line.cursor++;
 238                 if (el->el_chared.c_vcmd.action != NOP) {
 239                         cv_delfini(el);
 240                         return (CC_REFRESH);
 241                 }
 242         }
 243         return (CC_CURSOR);
 244 }
 245
 246
 247 /* ed_transpose_chars():
 248  *      Exchange the character to the left of the cursor with the one under it
 249  *      [^T] [^T]
 250  */
 251 protected el_action_t
 252 ed_transpose_chars(EditLine *el, int c)
 253 {
 254
 255         if (el->el_line.cursor < el->el_line.lastchar) {
 256                 if (el->el_line.lastchar <= &el->el_line.buffer[1])
 257                         return (CC_ERROR);
 258                 else
 259                         el->el_line.cursor++;
 260         }
 261         if (el->el_line.cursor > &el->el_line.buffer[1]) {
 262                 /* must have at least two chars entered */
 263                 c = el->el_line.cursor[-2];
 264                 el->el_line.cursor[-2] = el->el_line.cursor[-1];
 265                 el->el_line.cursor[-1] = c;
 266                 return (CC_REFRESH);
 267         } else
 268                 return (CC_ERROR);
 269 }
 270
 271
 272 /* ed_next_char():
 273  *      Move to the right one character
 274  *      [^F] [^F]
 275  */
 276 protected el_action_t
 277 /*ARGSUSED*/
 278 ed_next_char(EditLine *el, int c __attribute__((__unused__)))
 279 {
 280         char *lim = el->el_line.lastchar;
 281
 282         if (el->el_line.cursor >= lim ||
 283             (el->el_line.cursor == lim - 1 &&
 284             el->el_map.type == MAP_VI &&
 285             el->el_chared.c_vcmd.action == NOP))
 286                 return (CC_ERROR);
 287
 288         el->el_line.cursor += el->el_state.argument;
 289         if (el->el_line.cursor > lim)
 290                 el->el_line.cursor = lim;
 291
 292         if (el->el_map.type == MAP_VI)
 293                 if (el->el_chared.c_vcmd.action != NOP) {
 294                         cv_delfini(el);
 295                         return (CC_REFRESH);
 296                 }
 297         return (CC_CURSOR);
 298 }
 299
 300
 301 /* ed_prev_word():
 302  *      Move to the beginning of the current word
 303  *      [M-b] [b]
 304  */
 305 protected el_action_t
 306 /*ARGSUSED*/
 307 ed_prev_word(EditLine *el, int c __attribute__((__unused__)))
 308 {
 309
 310         if (el->el_line.cursor == el->el_line.buffer)
 311                 return (CC_ERROR);
 312
 313         el->el_line.cursor = c__prev_word(el->el_line.cursor,
 314             el->el_line.buffer,
 315             el->el_state.argument,
 316             ce__isword);
 317
 318         if (el->el_map.type == MAP_VI)
 319                 if (el->el_chared.c_vcmd.action != NOP) {
 320                         cv_delfini(el);
 321                         return (CC_REFRESH);
 322                 }
 323         return (CC_CURSOR);
 324 }
 325
 326
 327 /* ed_prev_char():
 328  *      Move to the left one character
 329  *      [^B] [^B]
 330  */
 331 protected el_action_t
 332 /*ARGSUSED*/
 333 ed_prev_char(EditLine *el, int c __attribute__((__unused__)))
 334 {
 335
 336         if (el->el_line.cursor > el->el_line.buffer) {
 337                 el->el_line.cursor -= el->el_state.argument;
 338                 if (el->el_line.cursor < el->el_line.buffer)
 339                         el->el_line.cursor = el->el_line.buffer;
 340
 341                 if (el->el_map.type == MAP_VI)
 342                         if (el->el_chared.c_vcmd.action != NOP) {
 343                                 cv_delfini(el);
 344                                 return (CC_REFRESH);
 345                         }
 346                 return (CC_CURSOR);
 347         } else
 348                 return (CC_ERROR);
 349 }
 350
 351
 352 /* ed_quoted_insert():
 353  *      Add the next character typed verbatim
 354  *      [^V] [^V]
 355  */
 356 protected el_action_t
 357 ed_quoted_insert(EditLine *el, int c)
 358 {
 359         int num;
 360         char tc;
 361
 362         tty_quotemode(el);
 363         num = el_getc(el, &tc);
 364         c = (unsigned char) tc;
 365         tty_noquotemode(el);
 366         if (num == 1)
 367                 return (ed_insert(el, c));
 368         else
 369                 return (ed_end_of_file(el, 0));
 370 }
 371
 372
 373 /* ed_digit():
 374  *      Adds to argument or enters a digit
 375  */
 376 protected el_action_t
 377 ed_digit(EditLine *el, int c)
 378 {
 379
 380         if (!isdigit(c))
 381                 return (CC_ERROR);
 382
 383         if (el->el_state.doingarg) {
 384                         /* if doing an arg, add this in... */
 385                 if (el->el_state.lastcmd == EM_UNIVERSAL_ARGUMENT)
 386                         el->el_state.argument = c - '0';
 387                 else {
 388                         if (el->el_state.argument > 1000000)
 389                                 return (CC_ERROR);
 390                         el->el_state.argument =
 391                             (el->el_state.argument * 10) + (c - '0');
 392                 }
 393                 return (CC_ARGHACK);
 394         }
 395
 396         return ed_insert(el, c);
 397 }
 398
 399
 400 /* ed_argument_digit():
 401  *      Digit that starts argument
 402  *      For ESC-n
 403  */
 404 protected el_action_t
 405 ed_argument_digit(EditLine *el, int c)
 406 {
 407
 408         if (!isdigit(c))
 409                 return (CC_ERROR);
 410
 411         if (el->el_state.doingarg) {
 412                 if (el->el_state.argument > 1000000)
 413                         return (CC_ERROR);
 414                 el->el_state.argument = (el->el_state.argument * 10) +
 415                     (c - '0');
 416         } else {                /* else starting an argument */
 417                 el->el_state.argument = c - '0';
 418                 el->el_state.doingarg = 1;
 419         }
 420         return (CC_ARGHACK);
 421 }
 422
 423
 424 /* ed_unassigned():
 425  *      Indicates unbound character
 426  *      Bound to keys that are not assigned
 427  */
 428 protected el_action_t
 429 /*ARGSUSED*/
 430 ed_unassigned(EditLine *el, int c __attribute__((__unused__)))
 431 {
 432
 433         return (CC_ERROR);
 434 }
 435
 436
 437 /**
 438  ** TTY key handling.
 439  **/
 440
 441 /* ed_tty_sigint():
 442  *      Tty interrupt character
 443  *      [^C]
 444  */
 445 protected el_action_t
 446 /*ARGSUSED*/
 447 ed_tty_sigint(EditLine *el __attribute__((__unused__)),
 448               int c __attribute__((__unused__)))
 449 {
 450
 451         return (CC_NORM);
 452 }
 453
 454
 455 /* ed_tty_dsusp():
 456  *      Tty delayed suspend character
 457  *      [^Y]
 458  */
 459 protected el_action_t
 460 /*ARGSUSED*/
 461 ed_tty_dsusp(EditLine *el __attribute__((__unused__)),
 462              int c __attribute__((__unused__)))
 463 {
 464
 465         return (CC_NORM);
 466 }
 467
 468
 469 /* ed_tty_flush_output():
 470  *      Tty flush output characters
 471  *      [^O]
 472  */
 473 protected el_action_t
 474 /*ARGSUSED*/
 475 ed_tty_flush_output(EditLine *el __attribute__((__unused__)),
 476                     int c __attribute__((__unused__)))
 477 {
 478
 479         return (CC_NORM);
 480 }
 481
 482
 483 /* ed_tty_sigquit():
 484  *      Tty quit character
 485  *      [^\]
 486  */
 487 protected el_action_t
 488 /*ARGSUSED*/
 489 ed_tty_sigquit(EditLine *el __attribute__((__unused__)),
 490                int c __attribute__((__unused__)))
 491 {
 492
 493         return (CC_NORM);
 494 }
 495
 496
 497 /* ed_tty_sigtstp():
 498  *      Tty suspend character
 499  *      [^Z]
 500  */
 501 protected el_action_t
 502 /*ARGSUSED*/
 503 ed_tty_sigtstp(EditLine *el __attribute__((__unused__)),
 504                int c __attribute__((__unused__)))
 505 {
 506
 507         return (CC_NORM);
 508 }
 509
 510
 511 /* ed_tty_stop_output():
 512  *      Tty disallow output characters
 513  *      [^S]
 514  */
 515 protected el_action_t
 516 /*ARGSUSED*/
 517 ed_tty_stop_output(EditLine *el __attribute__((__unused__)),
 518                    int c __attribute__((__unused__)))
 519 {
 520
 521         return (CC_NORM);
 522 }
 523
 524
 525 /* ed_tty_start_output():
 526  *      Tty allow output characters
 527  *      [^Q]
 528  */
 529 protected el_action_t
 530 /*ARGSUSED*/
 531 ed_tty_start_output(EditLine *el __attribute__((__unused__)),
 532                     int c __attribute__((__unused__)))
 533 {
 534
 535         return (CC_NORM);
 536 }
 537
 538
 539 /* ed_newline():
 540  *      Execute command
 541  *      [^J]
 542  */
 543 protected el_action_t
 544 /*ARGSUSED*/
 545 ed_newline(EditLine *el, int c __attribute__((__unused__)))
 546 {
 547
 548         re_goto_bottom(el);
 549         *el->el_line.lastchar++ = '\n';
 550         *el->el_line.lastchar = '\0';
 551         return (CC_NEWLINE);
 552 }
 553
 554
 555 /* ed_delete_prev_char():
 556  *      Delete the character to the left of the cursor
 557  *      [^?]
 558  */
 559 protected el_action_t
 560 /*ARGSUSED*/
 561 ed_delete_prev_char(EditLine *el, int c __attribute__((__unused__)))
 562 {
 563
 564         if (el->el_line.cursor <= el->el_line.buffer)
 565                 return (CC_ERROR);
 566
 567         c_delbefore(el, el->el_state.argument);
 568         el->el_line.cursor -= el->el_state.argument;
 569         if (el->el_line.cursor < el->el_line.buffer)
 570                 el->el_line.cursor = el->el_line.buffer;
 571         return (CC_REFRESH);
 572 }
 573
 574
 575 /* ed_clear_screen():
 576  *      Clear screen leaving current line at the top
 577  *      [^L]
 578  */
 579 protected el_action_t
 580 /*ARGSUSED*/
 581 ed_clear_screen(EditLine *el, int c __attribute__((__unused__)))
 582 {
 583
 584         term_clear_screen(el);  /* clear the whole real screen */
 585         re_clear_display(el);   /* reset everything */
 586         return (CC_REFRESH);
 587 }
 588
 589
 590 /* ed_redisplay():
 591  *      Redisplay everything
 592  *      ^R
 593  */
 594 protected el_action_t
 595 /*ARGSUSED*/
 596 ed_redisplay(EditLine *el __attribute__((__unused__)),
 597              int c __attribute__((__unused__)))
 598 {
 599
 600         return (CC_REDISPLAY);
 601 }
 602
 603
 604 /* ed_start_over():
 605  *      Erase current line and start from scratch
 606  *      [^G]
 607  */
 608 protected el_action_t
 609 /*ARGSUSED*/
 610 ed_start_over(EditLine *el, int c __attribute__((__unused__)))
 611 {
 612
 613         ch_reset(el, 0);
 614         return (CC_REFRESH);
 615 }
 616
 617
 618 /* ed_sequence_lead_in():
 619  *      First character in a bound sequence
 620  *      Placeholder for external keys
 621  */
 622 protected el_action_t
 623 /*ARGSUSED*/
 624 ed_sequence_lead_in(EditLine *el __attribute__((__unused__)),
 625                     int c __attribute__((__unused__)))
 626 {
 627
 628         return (CC_NORM);
 629 }
 630
 631
 632 /* ed_prev_history():
 633  *      Move to the previous history line
 634  *      [^P] [k]
 635  */
 636 protected el_action_t
 637 /*ARGSUSED*/
 638 ed_prev_history(EditLine *el, int c __attribute__((__unused__)))
 639 {
 640         char beep = 0;
 641         int sv_event = el->el_history.eventno;
 642
 643         el->el_chared.c_undo.len = -1;
 644         *el->el_line.lastchar = '\0';           /* just in case */
 645
 646         if (el->el_history.eventno == 0) {      /* save the current buffer
 647                                                  * away */
 648                 (void) strncpy(el->el_history.buf, el->el_line.buffer,
 649                     EL_BUFSIZ);
 650                 el->el_history.last = el->el_history.buf +
 651                     (el->el_line.lastchar - el->el_line.buffer);
 652         }
 653         el->el_history.eventno += el->el_state.argument;
 654
 655         if (hist_get(el) == CC_ERROR) {
 656                 if (el->el_map.type == MAP_VI) {
 657                         el->el_history.eventno = sv_event;
 658                         return CC_ERROR;
 659                 }
 660                 beep = 1;
 661                 /* el->el_history.eventno was fixed by first call */
 662                 (void) hist_get(el);
 663         }
 664         if (beep)
 665                 return CC_REFRESH_BEEP;
 666         return CC_REFRESH;
 667 }
 668
 669
 670 /* ed_next_history():
 671  *      Move to the next history line
 672  *      [^N] [j]
 673  */
 674 protected el_action_t
 675 /*ARGSUSED*/
 676 ed_next_history(EditLine *el, int c __attribute__((__unused__)))
 677 {
 678         el_action_t beep = CC_REFRESH, rval;
 679
 680         el->el_chared.c_undo.len = -1;
 681         *el->el_line.lastchar = '\0';   /* just in case */
 682
 683         el->el_history.eventno -= el->el_state.argument;
 684
 685         if (el->el_history.eventno < 0) {
 686                 el->el_history.eventno = 0;
 687                 beep = CC_REFRESH_BEEP;
 688         }
 689         rval = hist_get(el);
 690         if (rval == CC_REFRESH)
 691                 return beep;
 692         return rval;
 693
 694 }
 695
 696
 697 /* ed_search_prev_history():
 698  *      Search previous in history for a line matching the current
 699  *      next search history [M-P] [K]
 700  */
 701 protected el_action_t
 702 /*ARGSUSED*/
 703 ed_search_prev_history(EditLine *el, int c __attribute__((__unused__)))
 704 {
 705         const char *hp;
 706         int h;
 707         bool_t found = 0;
 708
 709         el->el_chared.c_vcmd.action = NOP;
 710         el->el_chared.c_undo.len = -1;
 711         *el->el_line.lastchar = '\0';   /* just in case */
 712         if (el->el_history.eventno < 0) {
 713 #ifdef DEBUG_EDIT
 714                 (void) fprintf(el->el_errfile,
 715                     "e_prev_search_hist(): eventno < 0;\n");
 716 #endif
 717                 el->el_history.eventno = 0;
 718                 return (CC_ERROR);
 719         }
 720         if (el->el_history.eventno == 0) {
 721                 (void) strncpy(el->el_history.buf, el->el_line.buffer,
 722                     EL_BUFSIZ);
 723                 el->el_history.last = el->el_history.buf +
 724                     (el->el_line.lastchar - el->el_line.buffer);
 725         }
 726         if (el->el_history.ref == NULL)
 727                 return (CC_ERROR);
 728
 729         hp = HIST_FIRST(el);
 730         if (hp == NULL)
 731                 return (CC_ERROR);
 732
 733         c_setpat(el);           /* Set search pattern !! */
 734
 735         for (h = 1; h <= el->el_history.eventno; h++)
 736                 hp = HIST_NEXT(el);
 737
 738         while (hp != NULL) {
 739 #ifdef SDEBUG
 740                 (void) fprintf(el->el_errfile, "Comparing with \"%s\"\n", hp);
 741 #endif
 742                 if ((strncmp(hp, el->el_line.buffer, (size_t)
 743                             (el->el_line.lastchar - el->el_line.buffer)) ||
 744                         hp[el->el_line.lastchar - el->el_line.buffer]) &&
 745                     c_hmatch(el, hp)) {
 746                         found++;
 747                         break;
 748                 }
 749                 h++;
 750                 hp = HIST_NEXT(el);
 751         }
 752
 753         if (!found) {
 754 #ifdef SDEBUG
 755                 (void) fprintf(el->el_errfile, "not found\n");
 756 #endif
 757                 return (CC_ERROR);
 758         }
 759         el->el_history.eventno = h;
 760
 761         return (hist_get(el));
 762 }
 763
 764
 765 /* ed_search_next_history():
 766  *      Search next in history for a line matching the current
 767  *      [M-N] [J]
 768  */
 769 protected el_action_t
 770 /*ARGSUSED*/
 771 ed_search_next_history(EditLine *el, int c __attribute__((__unused__)))
 772 {
 773         const char *hp;
 774         int h;
 775         bool_t found = 0;
 776
 777         el->el_chared.c_vcmd.action = NOP;
 778         el->el_chared.c_undo.len = -1;
 779         *el->el_line.lastchar = '\0';   /* just in case */
 780
 781         if (el->el_history.eventno == 0)
 782                 return (CC_ERROR);
 783
 784         if (el->el_history.ref == NULL)
 785                 return (CC_ERROR);
 786
 787         hp = HIST_FIRST(el);
 788         if (hp == NULL)
 789                 return (CC_ERROR);
 790
 791         c_setpat(el);           /* Set search pattern !! */
 792
 793         for (h = 1; h < el->el_history.eventno && hp; h++) {
 794 #ifdef SDEBUG
 795                 (void) fprintf(el->el_errfile, "Comparing with \"%s\"\n", hp);
 796 #endif
 797                 if ((strncmp(hp, el->el_line.buffer, (size_t)
 798                             (el->el_line.lastchar - el->el_line.buffer)) ||
 799                         hp[el->el_line.lastchar - el->el_line.buffer]) &&
 800                     c_hmatch(el, hp))
 801                         found = h;
 802                 hp = HIST_NEXT(el);
 803         }
 804
 805         if (!found) {           /* is it the current history number? */
 806                 if (!c_hmatch(el, el->el_history.buf)) {
 807 #ifdef SDEBUG
 808                         (void) fprintf(el->el_errfile, "not found\n");
 809 #endif
 810                         return (CC_ERROR);
 811                 }
 812         }
 813         el->el_history.eventno = found;
 814
 815         return (hist_get(el));
 816 }
 817
 818
 819 /* ed_prev_line():
 820  *      Move up one line
 821  *      Could be [k] [^p]
 822  */
 823 protected el_action_t
 824 /*ARGSUSED*/
 825 ed_prev_line(EditLine *el, int c __attribute__((__unused__)))
 826 {
 827         char *ptr;
 828         int nchars = c_hpos(el);
 829
 830         /*
 831          * Move to the line requested
 832          */
 833         if (*(ptr = el->el_line.cursor) == '\n')
 834                 ptr--;
 835
 836         for (; ptr >= el->el_line.buffer; ptr--)
 837                 if (*ptr == '\n' && --el->el_state.argument <= 0)
 838                         break;
 839
 840         if (el->el_state.argument > 0)
 841                 return (CC_ERROR);
 842
 843         /*
 844          * Move to the beginning of the line
 845          */
 846         for (ptr--; ptr >= el->el_line.buffer && *ptr != '\n'; ptr--)
 847                 continue;
 848
 849         /*
 850          * Move to the character requested
 851          */
 852         for (ptr++;
 853             nchars-- > 0 && ptr < el->el_line.lastchar && *ptr != '\n';
 854             ptr++)
 855                 continue;
 856
 857         el->el_line.cursor = ptr;
 858         return (CC_CURSOR);
 859 }
 860
 861
 862 /* ed_next_line():
 863  *      Move down one line
 864  *      Could be [j] [^n]
 865  */
 866 protected el_action_t
 867 /*ARGSUSED*/
 868 ed_next_line(EditLine *el, int c __attribute__((__unused__)))
 869 {
 870         char *ptr;
 871         int nchars = c_hpos(el);
 872
 873         /*
 874          * Move to the line requested
 875          */
 876         for (ptr = el->el_line.cursor; ptr < el->el_line.lastchar; ptr++)
 877                 if (*ptr == '\n' && --el->el_state.argument <= 0)
 878                         break;
 879
 880         if (el->el_state.argument > 0)
 881                 return (CC_ERROR);
 882
 883         /*
 884          * Move to the character requested
 885          */
 886         for (ptr++;
 887             nchars-- > 0 && ptr < el->el_line.lastchar && *ptr != '\n';
 888             ptr++)
 889                 continue;
 890
 891         el->el_line.cursor = ptr;
 892         return (CC_CURSOR);
 893 }
 894
 895
 896 /* ed_command():
 897  *      Editline extended command
 898  *      [M-X] [:]
 899  */
 900 protected el_action_t
 901 /*ARGSUSED*/
 902 ed_command(EditLine *el, int c __attribute__((__unused__)))
 903 {
 904         char tmpbuf[EL_BUFSIZ];
 905         int tmplen;
 906
 907         tmplen = c_gets(el, tmpbuf, "\n: ");
 908         term__putc('\n');
 909
 910         if (tmplen < 0 || (tmpbuf[tmplen] = 0, parse_line(el, tmpbuf)) == -1)
 911                 term_beep(el);
 912
 913         el->el_map.current = el->el_map.key;
 914         re_clear_display(el);
 915         return CC_REFRESH;
 916 }