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common.c revision 1.33 
      1 /*	$NetBSD: common.c,v 1.33 2016/02/16 14:08:25 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 1.33 2016/02/16 14:08:25 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 "chartype.h"
     49 #include "el.h"
     50 
     51 /* ed_end_of_file():
     52  *	Indicate end of file
     53  *	[^D]
     54  */
     55 protected el_action_t
     56 /*ARGSUSED*/
     57 ed_end_of_file(EditLine *el, wint_t c __attribute__((__unused__)))
     58 {
     59 
     60 	re_goto_bottom(el);
     61 	*el->el_line.lastchar = '\0';
     62 	return CC_EOF;
     63 }
     64 
     65 
     66 /* ed_insert():
     67  *	Add character to the line
     68  *	Insert a character [bound to all insert keys]
     69  */
     70 protected el_action_t
     71 ed_insert(EditLine *el, wint_t c)
     72 {
     73 	int count = el->el_state.argument;
     74 
     75 	if (c == '\0')
     76 		return CC_ERROR;
     77 
     78 	if (el->el_line.lastchar + el->el_state.argument >=
     79 	    el->el_line.limit) {
     80 		/* end of buffer space, try to allocate more */
     81 		if (!ch_enlargebufs(el, (size_t) count))
     82 			return CC_ERROR;	/* error allocating more */
     83 	}
     84 
     85 	if (count == 1) {
     86 		if (el->el_state.inputmode == MODE_INSERT
     87 		    || el->el_line.cursor >= el->el_line.lastchar)
     88 			c_insert(el, 1);
     89 
     90 		*el->el_line.cursor++ = (Char)c;
     91 		re_fastaddc(el);		/* fast refresh for one char. */
     92 	} else {
     93 		if (el->el_state.inputmode != MODE_REPLACE_1)
     94 			c_insert(el, el->el_state.argument);
     95 
     96 		while (count-- && el->el_line.cursor < el->el_line.lastchar)
     97 			*el->el_line.cursor++ = (Char)c;
     98 		re_refresh(el);
     99 	}
    100 
    101 	if (el->el_state.inputmode == MODE_REPLACE_1)
    102 		return vi_command_mode(el, 0);
    103 
    104 	return CC_NORM;
    105 }
    106 
    107 
    108 /* ed_delete_prev_word():
    109  *	Delete from beginning of current word to cursor
    110  *	[M-^?] [^W]
    111  */
    112 protected el_action_t
    113 /*ARGSUSED*/
    114 ed_delete_prev_word(EditLine *el, wint_t c __attribute__((__unused__)))
    115 {
    116 	Char *cp, *p, *kp;
    117 
    118 	if (el->el_line.cursor == el->el_line.buffer)
    119 		return CC_ERROR;
    120 
    121 	cp = c__prev_word(el->el_line.cursor, el->el_line.buffer,
    122 	    el->el_state.argument, ce__isword);
    123 
    124 	for (p = cp, kp = el->el_chared.c_kill.buf; p < el->el_line.cursor; p++)
    125 		*kp++ = *p;
    126 	el->el_chared.c_kill.last = kp;
    127 
    128 	c_delbefore(el, (int)(el->el_line.cursor - cp));/* delete before dot */
    129 	el->el_line.cursor = cp;
    130 	if (el->el_line.cursor < el->el_line.buffer)
    131 		el->el_line.cursor = el->el_line.buffer; /* bounds check */
    132 	return CC_REFRESH;
    133 }
    134 
    135 
    136 /* ed_delete_next_char():
    137  *	Delete character under cursor
    138  *	[^D] [x]
    139  */
    140 protected el_action_t
    141 /*ARGSUSED*/
    142 ed_delete_next_char(EditLine *el, wint_t c __attribute__((__unused__)))
    143 {
    144 #ifdef DEBUG_EDIT
    145 #define	EL	el->el_line
    146 	(void) fprintf(el->el_errlfile,
    147 	    "\nD(b: %x(%s)  c: %x(%s) last: %x(%s) limit: %x(%s)\n",
    148 	    EL.buffer, EL.buffer, EL.cursor, EL.cursor, EL.lastchar,
    149 	    EL.lastchar, EL.limit, EL.limit);
    150 #endif
    151 	if (el->el_line.cursor == el->el_line.lastchar) {
    152 			/* if I'm at the end */
    153 		if (el->el_map.type == MAP_VI) {
    154 			if (el->el_line.cursor == el->el_line.buffer) {
    155 				/* if I'm also at the beginning */
    156 #ifdef KSHVI
    157 				return CC_ERROR;
    158 #else
    159 				/* then do an EOF */
    160 				terminal_writec(el, c);
    161 				return CC_EOF;
    162 #endif
    163 			} else {
    164 #ifdef KSHVI
    165 				el->el_line.cursor--;
    166 #else
    167 				return CC_ERROR;
    168 #endif
    169 			}
    170 		} else
    171 				return CC_ERROR;
    172 	}
    173 	c_delafter(el, el->el_state.argument);	/* delete after dot */
    174 	if (el->el_map.type == MAP_VI &&
    175 	    el->el_line.cursor >= el->el_line.lastchar &&
    176 	    el->el_line.cursor > el->el_line.buffer)
    177 			/* bounds check */
    178 		el->el_line.cursor = el->el_line.lastchar - 1;
    179 	return CC_REFRESH;
    180 }
    181 
    182 
    183 /* ed_kill_line():
    184  *	Cut to the end of line
    185  *	[^K] [^K]
    186  */
    187 protected el_action_t
    188 /*ARGSUSED*/
    189 ed_kill_line(EditLine *el, wint_t c __attribute__((__unused__)))
    190 {
    191 	Char *kp, *cp;
    192 
    193 	cp = el->el_line.cursor;
    194 	kp = el->el_chared.c_kill.buf;
    195 	while (cp < el->el_line.lastchar)
    196 		*kp++ = *cp++;	/* copy it */
    197 	el->el_chared.c_kill.last = kp;
    198 			/* zap! -- delete to end */
    199 	el->el_line.lastchar = el->el_line.cursor;
    200 	return CC_REFRESH;
    201 }
    202 
    203 
    204 /* ed_move_to_end():
    205  *	Move cursor to the end of line
    206  *	[^E] [^E]
    207  */
    208 protected el_action_t
    209 /*ARGSUSED*/
    210 ed_move_to_end(EditLine *el, wint_t c __attribute__((__unused__)))
    211 {
    212 
    213 	el->el_line.cursor = el->el_line.lastchar;
    214 	if (el->el_map.type == MAP_VI) {
    215 		if (el->el_chared.c_vcmd.action != NOP) {
    216 			cv_delfini(el);
    217 			return CC_REFRESH;
    218 		}
    219 #ifdef VI_MOVE
    220 		el->el_line.cursor--;
    221 #endif
    222 	}
    223 	return CC_CURSOR;
    224 }
    225 
    226 
    227 /* ed_move_to_beg():
    228  *	Move cursor to the beginning of line
    229  *	[^A] [^A]
    230  */
    231 protected el_action_t
    232 /*ARGSUSED*/
    233 ed_move_to_beg(EditLine *el, wint_t c __attribute__((__unused__)))
    234 {
    235 
    236 	el->el_line.cursor = el->el_line.buffer;
    237 
    238 	if (el->el_map.type == MAP_VI) {
    239 			/* We want FIRST non space character */
    240 		while (Isspace(*el->el_line.cursor))
    241 			el->el_line.cursor++;
    242 		if (el->el_chared.c_vcmd.action != NOP) {
    243 			cv_delfini(el);
    244 			return CC_REFRESH;
    245 		}
    246 	}
    247 	return CC_CURSOR;
    248 }
    249 
    250 
    251 /* ed_transpose_chars():
    252  *	Exchange the character to the left of the cursor with the one under it
    253  *	[^T] [^T]
    254  */
    255 protected el_action_t
    256 ed_transpose_chars(EditLine *el, wint_t c)
    257 {
    258 
    259 	if (el->el_line.cursor < el->el_line.lastchar) {
    260 		if (el->el_line.lastchar <= &el->el_line.buffer[1])
    261 			return CC_ERROR;
    262 		else
    263 			el->el_line.cursor++;
    264 	}
    265 	if (el->el_line.cursor > &el->el_line.buffer[1]) {
    266 		/* must have at least two chars entered */
    267 		c = el->el_line.cursor[-2];
    268 		el->el_line.cursor[-2] = el->el_line.cursor[-1];
    269 		el->el_line.cursor[-1] = (Char)c;
    270 		return CC_REFRESH;
    271 	} else
    272 		return CC_ERROR;
    273 }
    274 
    275 
    276 /* ed_next_char():
    277  *	Move to the right one character
    278  *	[^F] [^F]
    279  */
    280 protected el_action_t
    281 /*ARGSUSED*/
    282 ed_next_char(EditLine *el, wint_t c __attribute__((__unused__)))
    283 {
    284 	Char *lim = el->el_line.lastchar;
    285 
    286 	if (el->el_line.cursor >= lim ||
    287 	    (el->el_line.cursor == lim - 1 &&
    288 	    el->el_map.type == MAP_VI &&
    289 	    el->el_chared.c_vcmd.action == NOP))
    290 		return CC_ERROR;
    291 
    292 	el->el_line.cursor += el->el_state.argument;
    293 	if (el->el_line.cursor > lim)
    294 		el->el_line.cursor = lim;
    295 
    296 	if (el->el_map.type == MAP_VI)
    297 		if (el->el_chared.c_vcmd.action != NOP) {
    298 			cv_delfini(el);
    299 			return CC_REFRESH;
    300 		}
    301 	return CC_CURSOR;
    302 }
    303 
    304 
    305 /* ed_prev_word():
    306  *	Move to the beginning of the current word
    307  *	[M-b] [b]
    308  */
    309 protected el_action_t
    310 /*ARGSUSED*/
    311 ed_prev_word(EditLine *el, wint_t c __attribute__((__unused__)))
    312 {
    313 
    314 	if (el->el_line.cursor == el->el_line.buffer)
    315 		return CC_ERROR;
    316 
    317 	el->el_line.cursor = c__prev_word(el->el_line.cursor,
    318 	    el->el_line.buffer,
    319 	    el->el_state.argument,
    320 	    ce__isword);
    321 
    322 	if (el->el_map.type == MAP_VI)
    323 		if (el->el_chared.c_vcmd.action != NOP) {
    324 			cv_delfini(el);
    325 			return CC_REFRESH;
    326 		}
    327 	return CC_CURSOR;
    328 }
    329 
    330 
    331 /* ed_prev_char():
    332  *	Move to the left one character
    333  *	[^B] [^B]
    334  */
    335 protected el_action_t
    336 /*ARGSUSED*/
    337 ed_prev_char(EditLine *el, wint_t c __attribute__((__unused__)))
    338 {
    339 
    340 	if (el->el_line.cursor > el->el_line.buffer) {
    341 		el->el_line.cursor -= el->el_state.argument;
    342 		if (el->el_line.cursor < el->el_line.buffer)
    343 			el->el_line.cursor = el->el_line.buffer;
    344 
    345 		if (el->el_map.type == MAP_VI)
    346 			if (el->el_chared.c_vcmd.action != NOP) {
    347 				cv_delfini(el);
    348 				return CC_REFRESH;
    349 			}
    350 		return CC_CURSOR;
    351 	} else
    352 		return CC_ERROR;
    353 }
    354 
    355 
    356 /* ed_quoted_insert():
    357  *	Add the next character typed verbatim
    358  *	[^V] [^V]
    359  */
    360 protected el_action_t
    361 ed_quoted_insert(EditLine *el, wint_t c)
    362 {
    363 	int num;
    364 	Char tc;
    365 
    366 	tty_quotemode(el);
    367 	num = FUN(el,getc)(el, &tc);
    368 	c = tc;
    369 	tty_noquotemode(el);
    370 	if (num == 1)
    371 		return ed_insert(el, c);
    372 	else
    373 		return ed_end_of_file(el, 0);
    374 }
    375 
    376 
    377 /* ed_digit():
    378  *	Adds to argument or enters a digit
    379  */
    380 protected el_action_t
    381 ed_digit(EditLine *el, wint_t c)
    382 {
    383 
    384 	if (!Isdigit(c))
    385 		return CC_ERROR;
    386 
    387 	if (el->el_state.doingarg) {
    388 			/* if doing an arg, add this in... */
    389 		if (el->el_state.lastcmd == EM_UNIVERSAL_ARGUMENT)
    390 			el->el_state.argument = c - '0';
    391 		else {
    392 			if (el->el_state.argument > 1000000)
    393 				return CC_ERROR;
    394 			el->el_state.argument =
    395 			    (el->el_state.argument * 10) + (c - '0');
    396 		}
    397 		return CC_ARGHACK;
    398 	}
    399 
    400 	return ed_insert(el, c);
    401 }
    402 
    403 
    404 /* ed_argument_digit():
    405  *	Digit that starts argument
    406  *	For ESC-n
    407  */
    408 protected el_action_t
    409 ed_argument_digit(EditLine *el, wint_t c)
    410 {
    411 
    412 	if (!Isdigit(c))
    413 		return CC_ERROR;
    414 
    415 	if (el->el_state.doingarg) {
    416 		if (el->el_state.argument > 1000000)
    417 			return CC_ERROR;
    418 		el->el_state.argument = (el->el_state.argument * 10) +
    419 		    (c - '0');
    420 	} else {		/* else starting an argument */
    421 		el->el_state.argument = c - '0';
    422 		el->el_state.doingarg = 1;
    423 	}
    424 	return CC_ARGHACK;
    425 }
    426 
    427 
    428 /* ed_unassigned():
    429  *	Indicates unbound character
    430  *	Bound to keys that are not assigned
    431  */
    432 protected el_action_t
    433 /*ARGSUSED*/
    434 ed_unassigned(EditLine *el __attribute__((__unused__)),
    435     wint_t c __attribute__((__unused__)))
    436 {
    437 
    438 	return CC_ERROR;
    439 }
    440 
    441 
    442 /**
    443  ** TTY key handling.
    444  **/
    445 
    446 /* ed_tty_sigint():
    447  *	Tty interrupt character
    448  *	[^C]
    449  */
    450 protected el_action_t
    451 /*ARGSUSED*/
    452 ed_tty_sigint(EditLine *el __attribute__((__unused__)),
    453 	      wint_t c __attribute__((__unused__)))
    454 {
    455 
    456 	return CC_NORM;
    457 }
    458 
    459 
    460 /* ed_tty_dsusp():
    461  *	Tty delayed suspend character
    462  *	[^Y]
    463  */
    464 protected el_action_t
    465 /*ARGSUSED*/
    466 ed_tty_dsusp(EditLine *el __attribute__((__unused__)),
    467 	     wint_t c __attribute__((__unused__)))
    468 {
    469 
    470 	return CC_NORM;
    471 }
    472 
    473 
    474 /* ed_tty_flush_output():
    475  *	Tty flush output characters
    476  *	[^O]
    477  */
    478 protected el_action_t
    479 /*ARGSUSED*/
    480 ed_tty_flush_output(EditLine *el __attribute__((__unused__)),
    481 		    wint_t c __attribute__((__unused__)))
    482 {
    483 
    484 	return CC_NORM;
    485 }
    486 
    487 
    488 /* ed_tty_sigquit():
    489  *	Tty quit character
    490  *	[^\]
    491  */
    492 protected el_action_t
    493 /*ARGSUSED*/
    494 ed_tty_sigquit(EditLine *el __attribute__((__unused__)),
    495 	       wint_t c __attribute__((__unused__)))
    496 {
    497 
    498 	return CC_NORM;
    499 }
    500 
    501 
    502 /* ed_tty_sigtstp():
    503  *	Tty suspend character
    504  *	[^Z]
    505  */
    506 protected el_action_t
    507 /*ARGSUSED*/
    508 ed_tty_sigtstp(EditLine *el __attribute__((__unused__)),
    509 	       wint_t c __attribute__((__unused__)))
    510 {
    511 
    512 	return CC_NORM;
    513 }
    514 
    515 
    516 /* ed_tty_stop_output():
    517  *	Tty disallow output characters
    518  *	[^S]
    519  */
    520 protected el_action_t
    521 /*ARGSUSED*/
    522 ed_tty_stop_output(EditLine *el __attribute__((__unused__)),
    523 		   wint_t c __attribute__((__unused__)))
    524 {
    525 
    526 	return CC_NORM;
    527 }
    528 
    529 
    530 /* ed_tty_start_output():
    531  *	Tty allow output characters
    532  *	[^Q]
    533  */
    534 protected el_action_t
    535 /*ARGSUSED*/
    536 ed_tty_start_output(EditLine *el __attribute__((__unused__)),
    537 		    wint_t c __attribute__((__unused__)))
    538 {
    539 
    540 	return CC_NORM;
    541 }
    542 
    543 
    544 /* ed_newline():
    545  *	Execute command
    546  *	[^J]
    547  */
    548 protected el_action_t
    549 /*ARGSUSED*/
    550 ed_newline(EditLine *el, wint_t c __attribute__((__unused__)))
    551 {
    552 
    553 	re_goto_bottom(el);
    554 	*el->el_line.lastchar++ = '\n';
    555 	*el->el_line.lastchar = '\0';
    556 	return CC_NEWLINE;
    557 }
    558 
    559 
    560 /* ed_delete_prev_char():
    561  *	Delete the character to the left of the cursor
    562  *	[^?]
    563  */
    564 protected el_action_t
    565 /*ARGSUSED*/
    566 ed_delete_prev_char(EditLine *el, wint_t c __attribute__((__unused__)))
    567 {
    568 
    569 	if (el->el_line.cursor <= el->el_line.buffer)
    570 		return CC_ERROR;
    571 
    572 	c_delbefore(el, el->el_state.argument);
    573 	el->el_line.cursor -= el->el_state.argument;
    574 	if (el->el_line.cursor < el->el_line.buffer)
    575 		el->el_line.cursor = el->el_line.buffer;
    576 	return CC_REFRESH;
    577 }
    578 
    579 
    580 /* ed_clear_screen():
    581  *	Clear screen leaving current line at the top
    582  *	[^L]
    583  */
    584 protected el_action_t
    585 /*ARGSUSED*/
    586 ed_clear_screen(EditLine *el, wint_t c __attribute__((__unused__)))
    587 {
    588 
    589 	terminal_clear_screen(el);	/* clear the whole real screen */
    590 	re_clear_display(el);	/* reset everything */
    591 	return CC_REFRESH;
    592 }
    593 
    594 
    595 /* ed_redisplay():
    596  *	Redisplay everything
    597  *	^R
    598  */
    599 protected el_action_t
    600 /*ARGSUSED*/
    601 ed_redisplay(EditLine *el __attribute__((__unused__)),
    602 	     wint_t c __attribute__((__unused__)))
    603 {
    604 
    605 	return CC_REDISPLAY;
    606 }
    607 
    608 
    609 /* ed_start_over():
    610  *	Erase current line and start from scratch
    611  *	[^G]
    612  */
    613 protected el_action_t
    614 /*ARGSUSED*/
    615 ed_start_over(EditLine *el, wint_t c __attribute__((__unused__)))
    616 {
    617 
    618 	ch_reset(el, 0);
    619 	return CC_REFRESH;
    620 }
    621 
    622 
    623 /* ed_sequence_lead_in():
    624  *	First character in a bound sequence
    625  *	Placeholder for external keys
    626  */
    627 protected el_action_t
    628 /*ARGSUSED*/
    629 ed_sequence_lead_in(EditLine *el __attribute__((__unused__)),
    630 		    wint_t c __attribute__((__unused__)))
    631 {
    632 
    633 	return CC_NORM;
    634 }
    635 
    636 
    637 /* ed_prev_history():
    638  *	Move to the previous history line
    639  *	[^P] [k]
    640  */
    641 protected el_action_t
    642 /*ARGSUSED*/
    643 ed_prev_history(EditLine *el, wint_t c __attribute__((__unused__)))
    644 {
    645 	char beep = 0;
    646 	int sv_event = el->el_history.eventno;
    647 
    648 	el->el_chared.c_undo.len = -1;
    649 	*el->el_line.lastchar = '\0';		/* just in case */
    650 
    651 	if (el->el_history.eventno == 0) {	/* save the current buffer
    652 						 * away */
    653 		(void) Strncpy(el->el_history.buf, el->el_line.buffer,
    654 		    EL_BUFSIZ);
    655 		el->el_history.last = el->el_history.buf +
    656 		    (el->el_line.lastchar - el->el_line.buffer);
    657 	}
    658 	el->el_history.eventno += el->el_state.argument;
    659 
    660 	if (hist_get(el) == CC_ERROR) {
    661 		if (el->el_map.type == MAP_VI) {
    662 			el->el_history.eventno = sv_event;
    663 
    664 		}
    665 		beep = 1;
    666 		/* el->el_history.eventno was fixed by first call */
    667 		(void) hist_get(el);
    668 	}
    669 	if (beep)
    670 		return CC_REFRESH_BEEP;
    671 	return CC_REFRESH;
    672 }
    673 
    674 
    675 /* ed_next_history():
    676  *	Move to the next history line
    677  *	[^N] [j]
    678  */
    679 protected el_action_t
    680 /*ARGSUSED*/
    681 ed_next_history(EditLine *el, wint_t c __attribute__((__unused__)))
    682 {
    683 	el_action_t beep = CC_REFRESH, rval;
    684 
    685 	el->el_chared.c_undo.len = -1;
    686 	*el->el_line.lastchar = '\0';	/* just in case */
    687 
    688 	el->el_history.eventno -= el->el_state.argument;
    689 
    690 	if (el->el_history.eventno < 0) {
    691 		el->el_history.eventno = 0;
    692 		beep = CC_REFRESH_BEEP;
    693 	}
    694 	rval = hist_get(el);
    695 	if (rval == CC_REFRESH)
    696 		return beep;
    697 	return rval;
    698 
    699 }
    700 
    701 
    702 /* ed_search_prev_history():
    703  *	Search previous in history for a line matching the current
    704  *	next search history [M-P] [K]
    705  */
    706 protected el_action_t
    707 /*ARGSUSED*/
    708 ed_search_prev_history(EditLine *el, wint_t c __attribute__((__unused__)))
    709 {
    710 	const Char *hp;
    711 	int h;
    712 	bool_t found = 0;
    713 
    714 	el->el_chared.c_vcmd.action = NOP;
    715 	el->el_chared.c_undo.len = -1;
    716 	*el->el_line.lastchar = '\0';	/* just in case */
    717 	if (el->el_history.eventno < 0) {
    718 #ifdef DEBUG_EDIT
    719 		(void) fprintf(el->el_errfile,
    720 		    "e_prev_search_hist(): eventno < 0;\n");
    721 #endif
    722 		el->el_history.eventno = 0;
    723 		return CC_ERROR;
    724 	}
    725 	if (el->el_history.eventno == 0) {
    726 		(void) Strncpy(el->el_history.buf, el->el_line.buffer,
    727 		    EL_BUFSIZ);
    728 		el->el_history.last = el->el_history.buf +
    729 		    (el->el_line.lastchar - el->el_line.buffer);
    730 	}
    731 	if (el->el_history.ref == NULL)
    732 		return CC_ERROR;
    733 
    734 	hp = HIST_FIRST(el);
    735 	if (hp == NULL)
    736 		return CC_ERROR;
    737 
    738 	c_setpat(el);		/* Set search pattern !! */
    739 
    740 	for (h = 1; h <= el->el_history.eventno; h++)
    741 		hp = HIST_NEXT(el);
    742 
    743 	while (hp != NULL) {
    744 #ifdef SDEBUG
    745 		(void) fprintf(el->el_errfile, "Comparing with \"%s\"\n", hp);
    746 #endif
    747 		if ((Strncmp(hp, el->el_line.buffer, (size_t)
    748 			    (el->el_line.lastchar - el->el_line.buffer)) ||
    749 			hp[el->el_line.lastchar - el->el_line.buffer]) &&
    750 		    c_hmatch(el, hp)) {
    751 			found++;
    752 			break;
    753 		}
    754 		h++;
    755 		hp = HIST_NEXT(el);
    756 	}
    757 
    758 	if (!found) {
    759 #ifdef SDEBUG
    760 		(void) fprintf(el->el_errfile, "not found\n");
    761 #endif
    762 		return CC_ERROR;
    763 	}
    764 	el->el_history.eventno = h;
    765 
    766 	return hist_get(el);
    767 }
    768 
    769 
    770 /* ed_search_next_history():
    771  *	Search next in history for a line matching the current
    772  *	[M-N] [J]
    773  */
    774 protected el_action_t
    775 /*ARGSUSED*/
    776 ed_search_next_history(EditLine *el, wint_t c __attribute__((__unused__)))
    777 {
    778 	const Char *hp;
    779 	int h;
    780 	bool_t found = 0;
    781 
    782 	el->el_chared.c_vcmd.action = NOP;
    783 	el->el_chared.c_undo.len = -1;
    784 	*el->el_line.lastchar = '\0';	/* just in case */
    785 
    786 	if (el->el_history.eventno == 0)
    787 		return CC_ERROR;
    788 
    789 	if (el->el_history.ref == NULL)
    790 		return CC_ERROR;
    791 
    792 	hp = HIST_FIRST(el);
    793 	if (hp == NULL)
    794 		return CC_ERROR;
    795 
    796 	c_setpat(el);		/* Set search pattern !! */
    797 
    798 	for (h = 1; h < el->el_history.eventno && hp; h++) {
    799 #ifdef SDEBUG
    800 		(void) fprintf(el->el_errfile, "Comparing with \"%s\"\n", hp);
    801 #endif
    802 		if ((Strncmp(hp, el->el_line.buffer, (size_t)
    803 			    (el->el_line.lastchar - el->el_line.buffer)) ||
    804 			hp[el->el_line.lastchar - el->el_line.buffer]) &&
    805 		    c_hmatch(el, hp))
    806 			found = h;
    807 		hp = HIST_NEXT(el);
    808 	}
    809 
    810 	if (!found) {		/* is it the current history number? */
    811 		if (!c_hmatch(el, el->el_history.buf)) {
    812 #ifdef SDEBUG
    813 			(void) fprintf(el->el_errfile, "not found\n");
    814 #endif
    815 			return CC_ERROR;
    816 		}
    817 	}
    818 	el->el_history.eventno = found;
    819 
    820 	return hist_get(el);
    821 }
    822 
    823 
    824 /* ed_prev_line():
    825  *	Move up one line
    826  *	Could be [k] [^p]
    827  */
    828 protected el_action_t
    829 /*ARGSUSED*/
    830 ed_prev_line(EditLine *el, wint_t c __attribute__((__unused__)))
    831 {
    832 	Char *ptr;
    833 	int nchars = c_hpos(el);
    834 
    835 	/*
    836          * Move to the line requested
    837          */
    838 	if (*(ptr = el->el_line.cursor) == '\n')
    839 		ptr--;
    840 
    841 	for (; ptr >= el->el_line.buffer; ptr--)
    842 		if (*ptr == '\n' && --el->el_state.argument <= 0)
    843 			break;
    844 
    845 	if (el->el_state.argument > 0)
    846 		return CC_ERROR;
    847 
    848 	/*
    849          * Move to the beginning of the line
    850          */
    851 	for (ptr--; ptr >= el->el_line.buffer && *ptr != '\n'; ptr--)
    852 		continue;
    853 
    854 	/*
    855          * Move to the character requested
    856          */
    857 	for (ptr++;
    858 	    nchars-- > 0 && ptr < el->el_line.lastchar && *ptr != '\n';
    859 	    ptr++)
    860 		continue;
    861 
    862 	el->el_line.cursor = ptr;
    863 	return CC_CURSOR;
    864 }
    865 
    866 
    867 /* ed_next_line():
    868  *	Move down one line
    869  *	Could be [j] [^n]
    870  */
    871 protected el_action_t
    872 /*ARGSUSED*/
    873 ed_next_line(EditLine *el, wint_t c __attribute__((__unused__)))
    874 {
    875 	Char *ptr;
    876 	int nchars = c_hpos(el);
    877 
    878 	/*
    879          * Move to the line requested
    880          */
    881 	for (ptr = el->el_line.cursor; ptr < el->el_line.lastchar; ptr++)
    882 		if (*ptr == '\n' && --el->el_state.argument <= 0)
    883 			break;
    884 
    885 	if (el->el_state.argument > 0)
    886 		return CC_ERROR;
    887 
    888 	/*
    889          * Move to the character requested
    890          */
    891 	for (ptr++;
    892 	    nchars-- > 0 && ptr < el->el_line.lastchar && *ptr != '\n';
    893 	    ptr++)
    894 		continue;
    895 
    896 	el->el_line.cursor = ptr;
    897 	return CC_CURSOR;
    898 }
    899 
    900 
    901 /* ed_command():
    902  *	Editline extended command
    903  *	[M-X] [:]
    904  */
    905 protected el_action_t
    906 /*ARGSUSED*/
    907 ed_command(EditLine *el, wint_t c __attribute__((__unused__)))
    908 {
    909 	Char tmpbuf[EL_BUFSIZ];
    910 	int tmplen;
    911 
    912 	tmplen = c_gets(el, tmpbuf, STR("\n: "));
    913 	terminal__putc(el, '\n');
    914 
    915 	if (tmplen < 0 || (tmpbuf[tmplen] = 0, parse_line(el, tmpbuf)) == -1)
    916 		terminal_beep(el);
    917 
    918 	el->el_map.current = el->el_map.key;
    919 	re_clear_display(el);
    920 	return CC_REFRESH;
    921 }
    922