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common.c revision 1.32 
      1 /*	$NetBSD: common.c,v 1.32 2016/02/16 14:06:05 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1992, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * This code is derived from software contributed to Berkeley by
      8  * Christos Zoulas of Cornell University.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. Neither the name of the University nor the names of its contributors
     19  *    may be used to endorse or promote products derived from this software
     20  *    without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32  * SUCH DAMAGE.
     33  */
     34 
     35 #include "config.h"
     36 #if !defined(lint) && !defined(SCCSID)
     37 #if 0
     38 static char sccsid[] = "@(#)common.c	8.1 (Berkeley) 6/4/93";
     39 #else
     40 __RCSID("$NetBSD: common.c,v 1.32 2016/02/16 14:06:05 christos Exp $");
     41 #endif
     42 #endif /* not lint && not SCCSID */
     43 
     44 /*
     45  * common.c: Common Editor functions
     46  */
     47 #include "histedit.h"
     48 #include "el.h"
     49 
     50 /* ed_end_of_file():
     51  *	Indicate end of file
     52  *	[^D]
     53  */
     54 protected el_action_t
     55 /*ARGSUSED*/
     56 ed_end_of_file(EditLine *el, wint_t c __attribute__((__unused__)))
     57 {
     58 
     59 	re_goto_bottom(el);
     60 	*el->el_line.lastchar = '\0';
     61 	return CC_EOF;
     62 }
     63 
     64 
     65 /* ed_insert():
     66  *	Add character to the line
     67  *	Insert a character [bound to all insert keys]
     68  */
     69 protected el_action_t
     70 ed_insert(EditLine *el, wint_t c)
     71 {
     72 	int count = el->el_state.argument;
     73 
     74 	if (c == '\0')
     75 		return CC_ERROR;
     76 
     77 	if (el->el_line.lastchar + el->el_state.argument >=
     78 	    el->el_line.limit) {
     79 		/* end of buffer space, try to allocate more */
     80 		if (!ch_enlargebufs(el, (size_t) count))
     81 			return CC_ERROR;	/* error allocating more */
     82 	}
     83 
     84 	if (count == 1) {
     85 		if (el->el_state.inputmode == MODE_INSERT
     86 		    || el->el_line.cursor >= el->el_line.lastchar)
     87 			c_insert(el, 1);
     88 
     89 		*el->el_line.cursor++ = (Char)c;
     90 		re_fastaddc(el);		/* fast refresh for one char. */
     91 	} else {
     92 		if (el->el_state.inputmode != MODE_REPLACE_1)
     93 			c_insert(el, el->el_state.argument);
     94 
     95 		while (count-- && el->el_line.cursor < el->el_line.lastchar)
     96 			*el->el_line.cursor++ = (Char)c;
     97 		re_refresh(el);
     98 	}
     99 
    100 	if (el->el_state.inputmode == MODE_REPLACE_1)
    101 		return vi_command_mode(el, 0);
    102 
    103 	return CC_NORM;
    104 }
    105 
    106 
    107 /* ed_delete_prev_word():
    108  *	Delete from beginning of current word to cursor
    109  *	[M-^?] [^W]
    110  */
    111 protected el_action_t
    112 /*ARGSUSED*/
    113 ed_delete_prev_word(EditLine *el, wint_t c __attribute__((__unused__)))
    114 {
    115 	Char *cp, *p, *kp;
    116 
    117 	if (el->el_line.cursor == el->el_line.buffer)
    118 		return CC_ERROR;
    119 
    120 	cp = c__prev_word(el->el_line.cursor, el->el_line.buffer,
    121 	    el->el_state.argument, ce__isword);
    122 
    123 	for (p = cp, kp = el->el_chared.c_kill.buf; p < el->el_line.cursor; p++)
    124 		*kp++ = *p;
    125 	el->el_chared.c_kill.last = kp;
    126 
    127 	c_delbefore(el, (int)(el->el_line.cursor - cp));/* delete before dot */
    128 	el->el_line.cursor = cp;
    129 	if (el->el_line.cursor < el->el_line.buffer)
    130 		el->el_line.cursor = el->el_line.buffer; /* bounds check */
    131 	return CC_REFRESH;
    132 }
    133 
    134 
    135 /* ed_delete_next_char():
    136  *	Delete character under cursor
    137  *	[^D] [x]
    138  */
    139 protected el_action_t
    140 /*ARGSUSED*/
    141 ed_delete_next_char(EditLine *el, wint_t c __attribute__((__unused__)))
    142 {
    143 #ifdef DEBUG_EDIT
    144 #define	EL	el->el_line
    145 	(void) fprintf(el->el_errlfile,
    146 	    "\nD(b: %x(%s)  c: %x(%s) last: %x(%s) limit: %x(%s)\n",
    147 	    EL.buffer, EL.buffer, EL.cursor, EL.cursor, EL.lastchar,
    148 	    EL.lastchar, EL.limit, EL.limit);
    149 #endif
    150 	if (el->el_line.cursor == el->el_line.lastchar) {
    151 			/* if I'm at the end */
    152 		if (el->el_map.type == MAP_VI) {
    153 			if (el->el_line.cursor == el->el_line.buffer) {
    154 				/* if I'm also at the beginning */
    155 #ifdef KSHVI
    156 				return CC_ERROR;
    157 #else
    158 				/* then do an EOF */
    159 				terminal_writec(el, c);
    160 				return CC_EOF;
    161 #endif
    162 			} else {
    163 #ifdef KSHVI
    164 				el->el_line.cursor--;
    165 #else
    166 				return CC_ERROR;
    167 #endif
    168 			}
    169 		} else
    170 				return CC_ERROR;
    171 	}
    172 	c_delafter(el, el->el_state.argument);	/* delete after dot */
    173 	if (el->el_map.type == MAP_VI &&
    174 	    el->el_line.cursor >= el->el_line.lastchar &&
    175 	    el->el_line.cursor > el->el_line.buffer)
    176 			/* bounds check */
    177 		el->el_line.cursor = el->el_line.lastchar - 1;
    178 	return CC_REFRESH;
    179 }
    180 
    181 
    182 /* ed_kill_line():
    183  *	Cut to the end of line
    184  *	[^K] [^K]
    185  */
    186 protected el_action_t
    187 /*ARGSUSED*/
    188 ed_kill_line(EditLine *el, wint_t c __attribute__((__unused__)))
    189 {
    190 	Char *kp, *cp;
    191 
    192 	cp = el->el_line.cursor;
    193 	kp = el->el_chared.c_kill.buf;
    194 	while (cp < el->el_line.lastchar)
    195 		*kp++ = *cp++;	/* copy it */
    196 	el->el_chared.c_kill.last = kp;
    197 			/* zap! -- delete to end */
    198 	el->el_line.lastchar = el->el_line.cursor;
    199 	return CC_REFRESH;
    200 }
    201 
    202 
    203 /* ed_move_to_end():
    204  *	Move cursor to the end of line
    205  *	[^E] [^E]
    206  */
    207 protected el_action_t
    208 /*ARGSUSED*/
    209 ed_move_to_end(EditLine *el, wint_t c __attribute__((__unused__)))
    210 {
    211 
    212 	el->el_line.cursor = el->el_line.lastchar;
    213 	if (el->el_map.type == MAP_VI) {
    214 		if (el->el_chared.c_vcmd.action != NOP) {
    215 			cv_delfini(el);
    216 			return CC_REFRESH;
    217 		}
    218 #ifdef VI_MOVE
    219 		el->el_line.cursor--;
    220 #endif
    221 	}
    222 	return CC_CURSOR;
    223 }
    224 
    225 
    226 /* ed_move_to_beg():
    227  *	Move cursor to the beginning of line
    228  *	[^A] [^A]
    229  */
    230 protected el_action_t
    231 /*ARGSUSED*/
    232 ed_move_to_beg(EditLine *el, wint_t c __attribute__((__unused__)))
    233 {
    234 
    235 	el->el_line.cursor = el->el_line.buffer;
    236 
    237 	if (el->el_map.type == MAP_VI) {
    238 			/* We want FIRST non space character */
    239 		while (Isspace(*el->el_line.cursor))
    240 			el->el_line.cursor++;
    241 		if (el->el_chared.c_vcmd.action != NOP) {
    242 			cv_delfini(el);
    243 			return CC_REFRESH;
    244 		}
    245 	}
    246 	return CC_CURSOR;
    247 }
    248 
    249 
    250 /* ed_transpose_chars():
    251  *	Exchange the character to the left of the cursor with the one under it
    252  *	[^T] [^T]
    253  */
    254 protected el_action_t
    255 ed_transpose_chars(EditLine *el, wint_t c)
    256 {
    257 
    258 	if (el->el_line.cursor < el->el_line.lastchar) {
    259 		if (el->el_line.lastchar <= &el->el_line.buffer[1])
    260 			return CC_ERROR;
    261 		else
    262 			el->el_line.cursor++;
    263 	}
    264 	if (el->el_line.cursor > &el->el_line.buffer[1]) {
    265 		/* must have at least two chars entered */
    266 		c = el->el_line.cursor[-2];
    267 		el->el_line.cursor[-2] = el->el_line.cursor[-1];
    268 		el->el_line.cursor[-1] = (Char)c;
    269 		return CC_REFRESH;
    270 	} else
    271 		return CC_ERROR;
    272 }
    273 
    274 
    275 /* ed_next_char():
    276  *	Move to the right one character
    277  *	[^F] [^F]
    278  */
    279 protected el_action_t
    280 /*ARGSUSED*/
    281 ed_next_char(EditLine *el, wint_t c __attribute__((__unused__)))
    282 {
    283 	Char *lim = el->el_line.lastchar;
    284 
    285 	if (el->el_line.cursor >= lim ||
    286 	    (el->el_line.cursor == lim - 1 &&
    287 	    el->el_map.type == MAP_VI &&
    288 	    el->el_chared.c_vcmd.action == NOP))
    289 		return CC_ERROR;
    290 
    291 	el->el_line.cursor += el->el_state.argument;
    292 	if (el->el_line.cursor > lim)
    293 		el->el_line.cursor = lim;
    294 
    295 	if (el->el_map.type == MAP_VI)
    296 		if (el->el_chared.c_vcmd.action != NOP) {
    297 			cv_delfini(el);
    298 			return CC_REFRESH;
    299 		}
    300 	return CC_CURSOR;
    301 }
    302 
    303 
    304 /* ed_prev_word():
    305  *	Move to the beginning of the current word
    306  *	[M-b] [b]
    307  */
    308 protected el_action_t
    309 /*ARGSUSED*/
    310 ed_prev_word(EditLine *el, wint_t c __attribute__((__unused__)))
    311 {
    312 
    313 	if (el->el_line.cursor == el->el_line.buffer)
    314 		return CC_ERROR;
    315 
    316 	el->el_line.cursor = c__prev_word(el->el_line.cursor,
    317 	    el->el_line.buffer,
    318 	    el->el_state.argument,
    319 	    ce__isword);
    320 
    321 	if (el->el_map.type == MAP_VI)
    322 		if (el->el_chared.c_vcmd.action != NOP) {
    323 			cv_delfini(el);
    324 			return CC_REFRESH;
    325 		}
    326 	return CC_CURSOR;
    327 }
    328 
    329 
    330 /* ed_prev_char():
    331  *	Move to the left one character
    332  *	[^B] [^B]
    333  */
    334 protected el_action_t
    335 /*ARGSUSED*/
    336 ed_prev_char(EditLine *el, wint_t c __attribute__((__unused__)))
    337 {
    338 
    339 	if (el->el_line.cursor > el->el_line.buffer) {
    340 		el->el_line.cursor -= el->el_state.argument;
    341 		if (el->el_line.cursor < el->el_line.buffer)
    342 			el->el_line.cursor = el->el_line.buffer;
    343 
    344 		if (el->el_map.type == MAP_VI)
    345 			if (el->el_chared.c_vcmd.action != NOP) {
    346 				cv_delfini(el);
    347 				return CC_REFRESH;
    348 			}
    349 		return CC_CURSOR;
    350 	} else
    351 		return CC_ERROR;
    352 }
    353 
    354 
    355 /* ed_quoted_insert():
    356  *	Add the next character typed verbatim
    357  *	[^V] [^V]
    358  */
    359 protected el_action_t
    360 ed_quoted_insert(EditLine *el, wint_t c)
    361 {
    362 	int num;
    363 	Char tc;
    364 
    365 	tty_quotemode(el);
    366 	num = FUN(el,getc)(el, &tc);
    367 	c = tc;
    368 	tty_noquotemode(el);
    369 	if (num == 1)
    370 		return ed_insert(el, c);
    371 	else
    372 		return ed_end_of_file(el, 0);
    373 }
    374 
    375 
    376 /* ed_digit():
    377  *	Adds to argument or enters a digit
    378  */
    379 protected el_action_t
    380 ed_digit(EditLine *el, wint_t c)
    381 {
    382 
    383 	if (!Isdigit(c))
    384 		return CC_ERROR;
    385 
    386 	if (el->el_state.doingarg) {
    387 			/* if doing an arg, add this in... */
    388 		if (el->el_state.lastcmd == EM_UNIVERSAL_ARGUMENT)
    389 			el->el_state.argument = c - '0';
    390 		else {
    391 			if (el->el_state.argument > 1000000)
    392 				return CC_ERROR;
    393 			el->el_state.argument =
    394 			    (el->el_state.argument * 10) + (c - '0');
    395 		}
    396 		return CC_ARGHACK;
    397 	}
    398 
    399 	return ed_insert(el, c);
    400 }
    401 
    402 
    403 /* ed_argument_digit():
    404  *	Digit that starts argument
    405  *	For ESC-n
    406  */
    407 protected el_action_t
    408 ed_argument_digit(EditLine *el, wint_t c)
    409 {
    410 
    411 	if (!Isdigit(c))
    412 		return CC_ERROR;
    413 
    414 	if (el->el_state.doingarg) {
    415 		if (el->el_state.argument > 1000000)
    416 			return CC_ERROR;
    417 		el->el_state.argument = (el->el_state.argument * 10) +
    418 		    (c - '0');
    419 	} else {		/* else starting an argument */
    420 		el->el_state.argument = c - '0';
    421 		el->el_state.doingarg = 1;
    422 	}
    423 	return CC_ARGHACK;
    424 }
    425 
    426 
    427 /* ed_unassigned():
    428  *	Indicates unbound character
    429  *	Bound to keys that are not assigned
    430  */
    431 protected el_action_t
    432 /*ARGSUSED*/
    433 ed_unassigned(EditLine *el __attribute__((__unused__)),
    434     wint_t c __attribute__((__unused__)))
    435 {
    436 
    437 	return CC_ERROR;
    438 }
    439 
    440 
    441 /**
    442  ** TTY key handling.
    443  **/
    444 
    445 /* ed_tty_sigint():
    446  *	Tty interrupt character
    447  *	[^C]
    448  */
    449 protected el_action_t
    450 /*ARGSUSED*/
    451 ed_tty_sigint(EditLine *el __attribute__((__unused__)),
    452 	      wint_t c __attribute__((__unused__)))
    453 {
    454 
    455 	return CC_NORM;
    456 }
    457 
    458 
    459 /* ed_tty_dsusp():
    460  *	Tty delayed suspend character
    461  *	[^Y]
    462  */
    463 protected el_action_t
    464 /*ARGSUSED*/
    465 ed_tty_dsusp(EditLine *el __attribute__((__unused__)),
    466 	     wint_t c __attribute__((__unused__)))
    467 {
    468 
    469 	return CC_NORM;
    470 }
    471 
    472 
    473 /* ed_tty_flush_output():
    474  *	Tty flush output characters
    475  *	[^O]
    476  */
    477 protected el_action_t
    478 /*ARGSUSED*/
    479 ed_tty_flush_output(EditLine *el __attribute__((__unused__)),
    480 		    wint_t c __attribute__((__unused__)))
    481 {
    482 
    483 	return CC_NORM;
    484 }
    485 
    486 
    487 /* ed_tty_sigquit():
    488  *	Tty quit character
    489  *	[^\]
    490  */
    491 protected el_action_t
    492 /*ARGSUSED*/
    493 ed_tty_sigquit(EditLine *el __attribute__((__unused__)),
    494 	       wint_t c __attribute__((__unused__)))
    495 {
    496 
    497 	return CC_NORM;
    498 }
    499 
    500 
    501 /* ed_tty_sigtstp():
    502  *	Tty suspend character
    503  *	[^Z]
    504  */
    505 protected el_action_t
    506 /*ARGSUSED*/
    507 ed_tty_sigtstp(EditLine *el __attribute__((__unused__)),
    508 	       wint_t c __attribute__((__unused__)))
    509 {
    510 
    511 	return CC_NORM;
    512 }
    513 
    514 
    515 /* ed_tty_stop_output():
    516  *	Tty disallow output characters
    517  *	[^S]
    518  */
    519 protected el_action_t
    520 /*ARGSUSED*/
    521 ed_tty_stop_output(EditLine *el __attribute__((__unused__)),
    522 		   wint_t c __attribute__((__unused__)))
    523 {
    524 
    525 	return CC_NORM;
    526 }
    527 
    528 
    529 /* ed_tty_start_output():
    530  *	Tty allow output characters
    531  *	[^Q]
    532  */
    533 protected el_action_t
    534 /*ARGSUSED*/
    535 ed_tty_start_output(EditLine *el __attribute__((__unused__)),
    536 		    wint_t c __attribute__((__unused__)))
    537 {
    538 
    539 	return CC_NORM;
    540 }
    541 
    542 
    543 /* ed_newline():
    544  *	Execute command
    545  *	[^J]
    546  */
    547 protected el_action_t
    548 /*ARGSUSED*/
    549 ed_newline(EditLine *el, wint_t c __attribute__((__unused__)))
    550 {
    551 
    552 	re_goto_bottom(el);
    553 	*el->el_line.lastchar++ = '\n';
    554 	*el->el_line.lastchar = '\0';
    555 	return CC_NEWLINE;
    556 }
    557 
    558 
    559 /* ed_delete_prev_char():
    560  *	Delete the character to the left of the cursor
    561  *	[^?]
    562  */
    563 protected el_action_t
    564 /*ARGSUSED*/
    565 ed_delete_prev_char(EditLine *el, wint_t c __attribute__((__unused__)))
    566 {
    567 
    568 	if (el->el_line.cursor <= el->el_line.buffer)
    569 		return CC_ERROR;
    570 
    571 	c_delbefore(el, el->el_state.argument);
    572 	el->el_line.cursor -= el->el_state.argument;
    573 	if (el->el_line.cursor < el->el_line.buffer)
    574 		el->el_line.cursor = el->el_line.buffer;
    575 	return CC_REFRESH;
    576 }
    577 
    578 
    579 /* ed_clear_screen():
    580  *	Clear screen leaving current line at the top
    581  *	[^L]
    582  */
    583 protected el_action_t
    584 /*ARGSUSED*/
    585 ed_clear_screen(EditLine *el, wint_t c __attribute__((__unused__)))
    586 {
    587 
    588 	terminal_clear_screen(el);	/* clear the whole real screen */
    589 	re_clear_display(el);	/* reset everything */
    590 	return CC_REFRESH;
    591 }
    592 
    593 
    594 /* ed_redisplay():
    595  *	Redisplay everything
    596  *	^R
    597  */
    598 protected el_action_t
    599 /*ARGSUSED*/
    600 ed_redisplay(EditLine *el __attribute__((__unused__)),
    601 	     wint_t c __attribute__((__unused__)))
    602 {
    603 
    604 	return CC_REDISPLAY;
    605 }
    606 
    607 
    608 /* ed_start_over():
    609  *	Erase current line and start from scratch
    610  *	[^G]
    611  */
    612 protected el_action_t
    613 /*ARGSUSED*/
    614 ed_start_over(EditLine *el, wint_t c __attribute__((__unused__)))
    615 {
    616 
    617 	ch_reset(el, 0);
    618 	return CC_REFRESH;
    619 }
    620 
    621 
    622 /* ed_sequence_lead_in():
    623  *	First character in a bound sequence
    624  *	Placeholder for external keys
    625  */
    626 protected el_action_t
    627 /*ARGSUSED*/
    628 ed_sequence_lead_in(EditLine *el __attribute__((__unused__)),
    629 		    wint_t c __attribute__((__unused__)))
    630 {
    631 
    632 	return CC_NORM;
    633 }
    634 
    635 
    636 /* ed_prev_history():
    637  *	Move to the previous history line
    638  *	[^P] [k]
    639  */
    640 protected el_action_t
    641 /*ARGSUSED*/
    642 ed_prev_history(EditLine *el, wint_t c __attribute__((__unused__)))
    643 {
    644 	char beep = 0;
    645 	int sv_event = el->el_history.eventno;
    646 
    647 	el->el_chared.c_undo.len = -1;
    648 	*el->el_line.lastchar = '\0';		/* just in case */
    649 
    650 	if (el->el_history.eventno == 0) {	/* save the current buffer
    651 						 * away */
    652 		(void) Strncpy(el->el_history.buf, el->el_line.buffer,
    653 		    EL_BUFSIZ);
    654 		el->el_history.last = el->el_history.buf +
    655 		    (el->el_line.lastchar - el->el_line.buffer);
    656 	}
    657 	el->el_history.eventno += el->el_state.argument;
    658 
    659 	if (hist_get(el) == CC_ERROR) {
    660 		if (el->el_map.type == MAP_VI) {
    661 			el->el_history.eventno = sv_event;
    662 
    663 		}
    664 		beep = 1;
    665 		/* el->el_history.eventno was fixed by first call */
    666 		(void) hist_get(el);
    667 	}
    668 	if (beep)
    669 		return CC_REFRESH_BEEP;
    670 	return CC_REFRESH;
    671 }
    672 
    673 
    674 /* ed_next_history():
    675  *	Move to the next history line
    676  *	[^N] [j]
    677  */
    678 protected el_action_t
    679 /*ARGSUSED*/
    680 ed_next_history(EditLine *el, wint_t c __attribute__((__unused__)))
    681 {
    682 	el_action_t beep = CC_REFRESH, rval;
    683 
    684 	el->el_chared.c_undo.len = -1;
    685 	*el->el_line.lastchar = '\0';	/* just in case */
    686 
    687 	el->el_history.eventno -= el->el_state.argument;
    688 
    689 	if (el->el_history.eventno < 0) {
    690 		el->el_history.eventno = 0;
    691 		beep = CC_REFRESH_BEEP;
    692 	}
    693 	rval = hist_get(el);
    694 	if (rval == CC_REFRESH)
    695 		return beep;
    696 	return rval;
    697 
    698 }
    699 
    700 
    701 /* ed_search_prev_history():
    702  *	Search previous in history for a line matching the current
    703  *	next search history [M-P] [K]
    704  */
    705 protected el_action_t
    706 /*ARGSUSED*/
    707 ed_search_prev_history(EditLine *el, wint_t c __attribute__((__unused__)))
    708 {
    709 	const Char *hp;
    710 	int h;
    711 	bool_t found = 0;
    712 
    713 	el->el_chared.c_vcmd.action = NOP;
    714 	el->el_chared.c_undo.len = -1;
    715 	*el->el_line.lastchar = '\0';	/* just in case */
    716 	if (el->el_history.eventno < 0) {
    717 #ifdef DEBUG_EDIT
    718 		(void) fprintf(el->el_errfile,
    719 		    "e_prev_search_hist(): eventno < 0;\n");
    720 #endif
    721 		el->el_history.eventno = 0;
    722 		return CC_ERROR;
    723 	}
    724 	if (el->el_history.eventno == 0) {
    725 		(void) Strncpy(el->el_history.buf, el->el_line.buffer,
    726 		    EL_BUFSIZ);
    727 		el->el_history.last = el->el_history.buf +
    728 		    (el->el_line.lastchar - el->el_line.buffer);
    729 	}
    730 	if (el->el_history.ref == NULL)
    731 		return CC_ERROR;
    732 
    733 	hp = HIST_FIRST(el);
    734 	if (hp == NULL)
    735 		return CC_ERROR;
    736 
    737 	c_setpat(el);		/* Set search pattern !! */
    738 
    739 	for (h = 1; h <= el->el_history.eventno; h++)
    740 		hp = HIST_NEXT(el);
    741 
    742 	while (hp != NULL) {
    743 #ifdef SDEBUG
    744 		(void) fprintf(el->el_errfile, "Comparing with \"%s\"\n", hp);
    745 #endif
    746 		if ((Strncmp(hp, el->el_line.buffer, (size_t)
    747 			    (el->el_line.lastchar - el->el_line.buffer)) ||
    748 			hp[el->el_line.lastchar - el->el_line.buffer]) &&
    749 		    c_hmatch(el, hp)) {
    750 			found++;
    751 			break;
    752 		}
    753 		h++;
    754 		hp = HIST_NEXT(el);
    755 	}
    756 
    757 	if (!found) {
    758 #ifdef SDEBUG
    759 		(void) fprintf(el->el_errfile, "not found\n");
    760 #endif
    761 		return CC_ERROR;
    762 	}
    763 	el->el_history.eventno = h;
    764 
    765 	return hist_get(el);
    766 }
    767 
    768 
    769 /* ed_search_next_history():
    770  *	Search next in history for a line matching the current
    771  *	[M-N] [J]
    772  */
    773 protected el_action_t
    774 /*ARGSUSED*/
    775 ed_search_next_history(EditLine *el, wint_t c __attribute__((__unused__)))
    776 {
    777 	const Char *hp;
    778 	int h;
    779 	bool_t found = 0;
    780 
    781 	el->el_chared.c_vcmd.action = NOP;
    782 	el->el_chared.c_undo.len = -1;
    783 	*el->el_line.lastchar = '\0';	/* just in case */
    784 
    785 	if (el->el_history.eventno == 0)
    786 		return CC_ERROR;
    787 
    788 	if (el->el_history.ref == NULL)
    789 		return CC_ERROR;
    790 
    791 	hp = HIST_FIRST(el);
    792 	if (hp == NULL)
    793 		return CC_ERROR;
    794 
    795 	c_setpat(el);		/* Set search pattern !! */
    796 
    797 	for (h = 1; h < el->el_history.eventno && hp; h++) {
    798 #ifdef SDEBUG
    799 		(void) fprintf(el->el_errfile, "Comparing with \"%s\"\n", hp);
    800 #endif
    801 		if ((Strncmp(hp, el->el_line.buffer, (size_t)
    802 			    (el->el_line.lastchar - el->el_line.buffer)) ||
    803 			hp[el->el_line.lastchar - el->el_line.buffer]) &&
    804 		    c_hmatch(el, hp))
    805 			found = h;
    806 		hp = HIST_NEXT(el);
    807 	}
    808 
    809 	if (!found) {		/* is it the current history number? */
    810 		if (!c_hmatch(el, el->el_history.buf)) {
    811 #ifdef SDEBUG
    812 			(void) fprintf(el->el_errfile, "not found\n");
    813 #endif
    814 			return CC_ERROR;
    815 		}
    816 	}
    817 	el->el_history.eventno = found;
    818 
    819 	return hist_get(el);
    820 }
    821 
    822 
    823 /* ed_prev_line():
    824  *	Move up one line
    825  *	Could be [k] [^p]
    826  */
    827 protected el_action_t
    828 /*ARGSUSED*/
    829 ed_prev_line(EditLine *el, wint_t c __attribute__((__unused__)))
    830 {
    831 	Char *ptr;
    832 	int nchars = c_hpos(el);
    833 
    834 	/*
    835          * Move to the line requested
    836          */
    837 	if (*(ptr = el->el_line.cursor) == '\n')
    838 		ptr--;
    839 
    840 	for (; ptr >= el->el_line.buffer; ptr--)
    841 		if (*ptr == '\n' && --el->el_state.argument <= 0)
    842 			break;
    843 
    844 	if (el->el_state.argument > 0)
    845 		return CC_ERROR;
    846 
    847 	/*
    848          * Move to the beginning of the line
    849          */
    850 	for (ptr--; ptr >= el->el_line.buffer && *ptr != '\n'; ptr--)
    851 		continue;
    852 
    853 	/*
    854          * Move to the character requested
    855          */
    856 	for (ptr++;
    857 	    nchars-- > 0 && ptr < el->el_line.lastchar && *ptr != '\n';
    858 	    ptr++)
    859 		continue;
    860 
    861 	el->el_line.cursor = ptr;
    862 	return CC_CURSOR;
    863 }
    864 
    865 
    866 /* ed_next_line():
    867  *	Move down one line
    868  *	Could be [j] [^n]
    869  */
    870 protected el_action_t
    871 /*ARGSUSED*/
    872 ed_next_line(EditLine *el, wint_t c __attribute__((__unused__)))
    873 {
    874 	Char *ptr;
    875 	int nchars = c_hpos(el);
    876 
    877 	/*
    878          * Move to the line requested
    879          */
    880 	for (ptr = el->el_line.cursor; ptr < el->el_line.lastchar; ptr++)
    881 		if (*ptr == '\n' && --el->el_state.argument <= 0)
    882 			break;
    883 
    884 	if (el->el_state.argument > 0)
    885 		return CC_ERROR;
    886 
    887 	/*
    888          * Move to the character requested
    889          */
    890 	for (ptr++;
    891 	    nchars-- > 0 && ptr < el->el_line.lastchar && *ptr != '\n';
    892 	    ptr++)
    893 		continue;
    894 
    895 	el->el_line.cursor = ptr;
    896 	return CC_CURSOR;
    897 }
    898 
    899 
    900 /* ed_command():
    901  *	Editline extended command
    902  *	[M-X] [:]
    903  */
    904 protected el_action_t
    905 /*ARGSUSED*/
    906 ed_command(EditLine *el, wint_t c __attribute__((__unused__)))
    907 {
    908 	Char tmpbuf[EL_BUFSIZ];
    909 	int tmplen;
    910 
    911 	tmplen = c_gets(el, tmpbuf, STR("\n: "));
    912 	terminal__putc(el, '\n');
    913 
    914 	if (tmplen < 0 || (tmpbuf[tmplen] = 0, parse_line(el, tmpbuf)) == -1)
    915 		terminal_beep(el);
    916 
    917 	el->el_map.current = el->el_map.key;
    918 	re_clear_display(el);
    919 	return CC_REFRESH;
    920 }
    921