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common.c revision 1.9 
      1 /*	$NetBSD: common.c,v 1.9 2000/09/04 22:06:29 lukem 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. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by the University of
     21  *	California, Berkeley and its contributors.
     22  * 4. Neither the name of the University nor the names of its contributors
     23  *    may be used to endorse or promote products derived from this software
     24  *    without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     36  * SUCH DAMAGE.
     37  */
     38 
     39 #include <sys/cdefs.h>
     40 #if !defined(lint) && !defined(SCCSID)
     41 #if 0
     42 static char sccsid[] = "@(#)common.c	8.1 (Berkeley) 6/4/93";
     43 #else
     44 __RCSID("$NetBSD: common.c,v 1.9 2000/09/04 22:06:29 lukem Exp $");
     45 #endif
     46 #endif /* not lint && not SCCSID */
     47 
     48 /*
     49  * common.c: Common Editor functions
     50  */
     51 #include "sys.h"
     52 #include "el.h"
     53 
     54 /* ed_end_of_file():
     55  *	Indicate end of file
     56  *	[^D]
     57  */
     58 protected el_action_t
     59 /*ARGSUSED*/
     60 ed_end_of_file(EditLine *el, int c)
     61 {
     62 
     63 	re_goto_bottom(el);
     64 	*el->el_line.lastchar = '\0';
     65 	return (CC_EOF);
     66 }
     67 
     68 
     69 /* ed_insert():
     70  *	Add character to the line
     71  *	Insert a character [bound to all insert keys]
     72  */
     73 protected el_action_t
     74 ed_insert(EditLine *el, int c)
     75 {
     76 	int i;
     77 
     78 	if (c == '\0')
     79 		return (CC_ERROR);
     80 
     81 	if (el->el_line.lastchar + el->el_state.argument >=
     82 	    el->el_line.limit)
     83 		return (CC_ERROR);	/* end of buffer space */
     84 
     85 	if (el->el_state.argument == 1) {
     86 		if (el->el_state.inputmode != MODE_INSERT) {
     87 			el->el_chared.c_undo.buf[el->el_chared.c_undo.isize++] =
     88 			    *el->el_line.cursor;
     89 			el->el_chared.c_undo.buf[el->el_chared.c_undo.isize] =
     90 			    '\0';
     91 			c_delafter(el, 1);
     92 		}
     93 		c_insert(el, 1);
     94 
     95 		*el->el_line.cursor++ = c;
     96 		el->el_state.doingarg = 0;	/* just in case */
     97 		re_fastaddc(el);		/* fast refresh for one char. */
     98 	} else {
     99 		if (el->el_state.inputmode != MODE_INSERT) {
    100 			for (i = 0; i < el->el_state.argument; i++)
    101 				el->el_chared.c_undo.buf[el->el_chared.c_undo.isize++] =
    102 				    el->el_line.cursor[i];
    103 
    104 			el->el_chared.c_undo.buf[el->el_chared.c_undo.isize] =
    105 			    '\0';
    106 			c_delafter(el, el->el_state.argument);
    107 		}
    108 		c_insert(el, el->el_state.argument);
    109 
    110 		while (el->el_state.argument--)
    111 			*el->el_line.cursor++ = c;
    112 		re_refresh(el);
    113 	}
    114 
    115 	if (el->el_state.inputmode == MODE_REPLACE_1)
    116 		(void) vi_command_mode(el, 0);
    117 
    118 	return (CC_NORM);
    119 }
    120 
    121 
    122 /* ed_delete_prev_word():
    123  *	Delete from beginning of current word to cursor
    124  *	[M-^?] [^W]
    125  */
    126 protected el_action_t
    127 /*ARGSUSED*/
    128 ed_delete_prev_word(EditLine *el, int c)
    129 {
    130 	char *cp, *p, *kp;
    131 
    132 	if (el->el_line.cursor == el->el_line.buffer)
    133 		return (CC_ERROR);
    134 
    135 	cp = c__prev_word(el->el_line.cursor, el->el_line.buffer,
    136 	    el->el_state.argument, ce__isword);
    137 
    138 	for (p = cp, kp = el->el_chared.c_kill.buf; p < el->el_line.cursor; p++)
    139 		*kp++ = *p;
    140 	el->el_chared.c_kill.last = kp;
    141 
    142 	c_delbefore(el, el->el_line.cursor - cp);	/* delete before dot */
    143 	el->el_line.cursor = cp;
    144 	if (el->el_line.cursor < el->el_line.buffer)
    145 		el->el_line.cursor = el->el_line.buffer; /* bounds check */
    146 	return (CC_REFRESH);
    147 }
    148 
    149 
    150 /* ed_delete_next_char():
    151  *	Delete character under cursor
    152  *	[^D] [x]
    153  */
    154 protected el_action_t
    155 /*ARGSUSED*/
    156 ed_delete_next_char(EditLine *el, int c)
    157 {
    158 #ifdef notdef			/* XXX */
    159 #define	EL	el->el_line
    160 	(void) fprintf(el->el_errlfile,
    161 	    "\nD(b: %x(%s)  c: %x(%s) last: %x(%s) limit: %x(%s)\n",
    162 	    EL.buffer, EL.buffer, EL.cursor, EL.cursor, EL.lastchar,
    163 	    EL.lastchar, EL.limit, EL.limit);
    164 #endif
    165 	if (el->el_line.cursor == el->el_line.lastchar) {
    166 			/* if I'm at the end */
    167 		if (el->el_map.type == MAP_VI) {
    168 			if (el->el_line.cursor == el->el_line.buffer) {
    169 				/* if I'm also at the beginning */
    170 #ifdef KSHVI
    171 				return (CC_ERROR);
    172 #else
    173 				term_overwrite(el, STReof, 4);
    174 					/* then do a EOF */
    175 				term__flush();
    176 				return (CC_EOF);
    177 #endif
    178 			} else {
    179 #ifdef KSHVI
    180 				el->el_line.cursor--;
    181 #else
    182 				return (CC_ERROR);
    183 #endif
    184 			}
    185 		} else {
    186 			if (el->el_line.cursor != el->el_line.buffer)
    187 				el->el_line.cursor--;
    188 			else
    189 				return (CC_ERROR);
    190 		}
    191 	}
    192 	c_delafter(el, el->el_state.argument);	/* delete after dot */
    193 	if (el->el_line.cursor >= el->el_line.lastchar &&
    194 	    el->el_line.cursor > el->el_line.buffer)
    195 			/* bounds check */
    196 		el->el_line.cursor = el->el_line.lastchar - 1;
    197 	return (CC_REFRESH);
    198 }
    199 
    200 
    201 /* ed_kill_line():
    202  *	Cut to the end of line
    203  *	[^K] [^K]
    204  */
    205 protected el_action_t
    206 /*ARGSUSED*/
    207 ed_kill_line(EditLine *el, int c)
    208 {
    209 	char *kp, *cp;
    210 
    211 	cp = el->el_line.cursor;
    212 	kp = el->el_chared.c_kill.buf;
    213 	while (cp < el->el_line.lastchar)
    214 		*kp++ = *cp++;	/* copy it */
    215 	el->el_chared.c_kill.last = kp;
    216 			/* zap! -- delete to end */
    217 	el->el_line.lastchar = el->el_line.cursor;
    218 	return (CC_REFRESH);
    219 }
    220 
    221 
    222 /* ed_move_to_end():
    223  *	Move cursor to the end of line
    224  *	[^E] [^E]
    225  */
    226 protected el_action_t
    227 /*ARGSUSED*/
    228 ed_move_to_end(EditLine *el, int c)
    229 {
    230 
    231 	el->el_line.cursor = el->el_line.lastchar;
    232 	if (el->el_map.type == MAP_VI) {
    233 #ifdef VI_MOVE
    234 		el->el_line.cursor--;
    235 #endif
    236 		if (el->el_chared.c_vcmd.action & DELETE) {
    237 			cv_delfini(el);
    238 			return (CC_REFRESH);
    239 		}
    240 	}
    241 	return (CC_CURSOR);
    242 }
    243 
    244 
    245 /* ed_move_to_beg():
    246  *	Move cursor to the beginning of line
    247  *	[^A] [^A]
    248  */
    249 protected el_action_t
    250 /*ARGSUSED*/
    251 ed_move_to_beg(EditLine *el, int c)
    252 {
    253 
    254 	el->el_line.cursor = el->el_line.buffer;
    255 
    256 	if (el->el_map.type == MAP_VI) {
    257 			/* We want FIRST non space character */
    258 		while (isspace((unsigned char) *el->el_line.cursor))
    259 			el->el_line.cursor++;
    260 		if (el->el_chared.c_vcmd.action & DELETE) {
    261 			cv_delfini(el);
    262 			return (CC_REFRESH);
    263 		}
    264 	}
    265 	return (CC_CURSOR);
    266 }
    267 
    268 
    269 /* ed_transpose_chars():
    270  *	Exchange the character to the left of the cursor with the one under it
    271  *	[^T] [^T]
    272  */
    273 protected el_action_t
    274 ed_transpose_chars(EditLine *el, int c)
    275 {
    276 
    277 	if (el->el_line.cursor < el->el_line.lastchar) {
    278 		if (el->el_line.lastchar <= &el->el_line.buffer[1])
    279 			return (CC_ERROR);
    280 		else
    281 			el->el_line.cursor++;
    282 	}
    283 	if (el->el_line.cursor > &el->el_line.buffer[1]) {
    284 		/* must have at least two chars entered */
    285 		c = el->el_line.cursor[-2];
    286 		el->el_line.cursor[-2] = el->el_line.cursor[-1];
    287 		el->el_line.cursor[-1] = c;
    288 		return (CC_REFRESH);
    289 	} else
    290 		return (CC_ERROR);
    291 }
    292 
    293 
    294 /* ed_next_char():
    295  *	Move to the right one character
    296  *	[^F] [^F]
    297  */
    298 protected el_action_t
    299 /*ARGSUSED*/
    300 ed_next_char(EditLine *el, int c)
    301 {
    302 
    303 	if (el->el_line.cursor >= el->el_line.lastchar)
    304 		return (CC_ERROR);
    305 
    306 	el->el_line.cursor += el->el_state.argument;
    307 	if (el->el_line.cursor > el->el_line.lastchar)
    308 		el->el_line.cursor = el->el_line.lastchar;
    309 
    310 	if (el->el_map.type == MAP_VI)
    311 		if (el->el_chared.c_vcmd.action & DELETE) {
    312 			cv_delfini(el);
    313 			return (CC_REFRESH);
    314 		}
    315 	return (CC_CURSOR);
    316 }
    317 
    318 
    319 /* ed_prev_word():
    320  *	Move to the beginning of the current word
    321  *	[M-b] [b]
    322  */
    323 protected el_action_t
    324 /*ARGSUSED*/
    325 ed_prev_word(EditLine *el, int c)
    326 {
    327 
    328 	if (el->el_line.cursor == el->el_line.buffer)
    329 		return (CC_ERROR);
    330 
    331 	el->el_line.cursor = c__prev_word(el->el_line.cursor,
    332 	    el->el_line.buffer,
    333 	    el->el_state.argument,
    334 	    ce__isword);
    335 
    336 	if (el->el_map.type == MAP_VI)
    337 		if (el->el_chared.c_vcmd.action & DELETE) {
    338 			cv_delfini(el);
    339 			return (CC_REFRESH);
    340 		}
    341 	return (CC_CURSOR);
    342 }
    343 
    344 
    345 /* ed_prev_char():
    346  *	Move to the left one character
    347  *	[^B] [^B]
    348  */
    349 protected el_action_t
    350 /*ARGSUSED*/
    351 ed_prev_char(EditLine *el, int c)
    352 {
    353 
    354 	if (el->el_line.cursor > el->el_line.buffer) {
    355 		el->el_line.cursor -= el->el_state.argument;
    356 		if (el->el_line.cursor < el->el_line.buffer)
    357 			el->el_line.cursor = el->el_line.buffer;
    358 
    359 		if (el->el_map.type == MAP_VI)
    360 			if (el->el_chared.c_vcmd.action & DELETE) {
    361 				cv_delfini(el);
    362 				return (CC_REFRESH);
    363 			}
    364 		return (CC_CURSOR);
    365 	} else
    366 		return (CC_ERROR);
    367 }
    368 
    369 
    370 /* ed_quoted_insert():
    371  *	Add the next character typed verbatim
    372  *	[^V] [^V]
    373  */
    374 protected el_action_t
    375 ed_quoted_insert(EditLine *el, int c)
    376 {
    377 	int num;
    378 	char tc;
    379 
    380 	tty_quotemode(el);
    381 	num = el_getc(el, &tc);
    382 	c = (unsigned char) tc;
    383 	tty_noquotemode(el);
    384 	if (num == 1)
    385 		return (ed_insert(el, c));
    386 	else
    387 		return (ed_end_of_file(el, 0));
    388 }
    389 
    390 
    391 /* ed_digit():
    392  *	Adds to argument or enters a digit
    393  */
    394 protected el_action_t
    395 ed_digit(EditLine *el, int c)
    396 {
    397 
    398 	if (!isdigit(c))
    399 		return (CC_ERROR);
    400 
    401 	if (el->el_state.doingarg) {
    402 			/* if doing an arg, add this in... */
    403 		if (el->el_state.lastcmd == EM_UNIVERSAL_ARGUMENT)
    404 			el->el_state.argument = c - '0';
    405 		else {
    406 			if (el->el_state.argument > 1000000)
    407 				return (CC_ERROR);
    408 			el->el_state.argument =
    409 			    (el->el_state.argument * 10) + (c - '0');
    410 		}
    411 		return (CC_ARGHACK);
    412 	} else {
    413 		if (el->el_line.lastchar + 1 >= el->el_line.limit)
    414 			return (CC_ERROR);
    415 
    416 		if (el->el_state.inputmode != MODE_INSERT) {
    417 			el->el_chared.c_undo.buf[el->el_chared.c_undo.isize++] =
    418 			    *el->el_line.cursor;
    419 			el->el_chared.c_undo.buf[el->el_chared.c_undo.isize] =
    420 			    '\0';
    421 			c_delafter(el, 1);
    422 		}
    423 		c_insert(el, 1);
    424 		*el->el_line.cursor++ = c;
    425 		el->el_state.doingarg = 0;
    426 		re_fastaddc(el);
    427 	}
    428 	return (CC_NORM);
    429 }
    430 
    431 
    432 /* ed_argument_digit():
    433  *	Digit that starts argument
    434  *	For ESC-n
    435  */
    436 protected el_action_t
    437 ed_argument_digit(EditLine *el, int c)
    438 {
    439 
    440 	if (!isdigit(c))
    441 		return (CC_ERROR);
    442 
    443 	if (el->el_state.doingarg) {
    444 		if (el->el_state.argument > 1000000)
    445 			return (CC_ERROR);
    446 		el->el_state.argument = (el->el_state.argument * 10) +
    447 		    (c - '0');
    448 	} else {		/* else starting an argument */
    449 		el->el_state.argument = c - '0';
    450 		el->el_state.doingarg = 1;
    451 	}
    452 	return (CC_ARGHACK);
    453 }
    454 
    455 
    456 /* ed_unassigned():
    457  *	Indicates unbound character
    458  *	Bound to keys that are not assigned
    459  */
    460 protected el_action_t
    461 /*ARGSUSED*/
    462 ed_unassigned(EditLine *el, int c)
    463 {
    464 
    465 	term_beep(el);
    466 	term__flush();
    467 	return (CC_NORM);
    468 }
    469 
    470 
    471 /**
    472  ** TTY key handling.
    473  **/
    474 
    475 /* ed_tty_sigint():
    476  *	Tty interrupt character
    477  *	[^C]
    478  */
    479 protected el_action_t
    480 /*ARGSUSED*/
    481 ed_tty_sigint(EditLine *el, int c)
    482 {
    483 
    484 	return (CC_NORM);
    485 }
    486 
    487 
    488 /* ed_tty_dsusp():
    489  *	Tty delayed suspend character
    490  *	[^Y]
    491  */
    492 protected el_action_t
    493 /*ARGSUSED*/
    494 ed_tty_dsusp(EditLine *el, int c)
    495 {
    496 
    497 	return (CC_NORM);
    498 }
    499 
    500 
    501 /* ed_tty_flush_output():
    502  *	Tty flush output characters
    503  *	[^O]
    504  */
    505 protected el_action_t
    506 /*ARGSUSED*/
    507 ed_tty_flush_output(EditLine *el, int c)
    508 {
    509 
    510 	return (CC_NORM);
    511 }
    512 
    513 
    514 /* ed_tty_sigquit():
    515  *	Tty quit character
    516  *	[^\]
    517  */
    518 protected el_action_t
    519 /*ARGSUSED*/
    520 ed_tty_sigquit(EditLine *el, int c)
    521 {
    522 
    523 	return (CC_NORM);
    524 }
    525 
    526 
    527 /* ed_tty_sigtstp():
    528  *	Tty suspend character
    529  *	[^Z]
    530  */
    531 protected el_action_t
    532 /*ARGSUSED*/
    533 ed_tty_sigtstp(EditLine *el, int c)
    534 {
    535 
    536 	return (CC_NORM);
    537 }
    538 
    539 
    540 /* ed_tty_stop_output():
    541  *	Tty disallow output characters
    542  *	[^S]
    543  */
    544 protected el_action_t
    545 /*ARGSUSED*/
    546 ed_tty_stop_output(EditLine *el, int c)
    547 {
    548 
    549 	return (CC_NORM);
    550 }
    551 
    552 
    553 /* ed_tty_start_output():
    554  *	Tty allow output characters
    555  *	[^Q]
    556  */
    557 protected el_action_t
    558 /*ARGSUSED*/
    559 ed_tty_start_output(EditLine *el, int c)
    560 {
    561 
    562 	return (CC_NORM);
    563 }
    564 
    565 
    566 /* ed_newline():
    567  *	Execute command
    568  *	[^J]
    569  */
    570 protected el_action_t
    571 /*ARGSUSED*/
    572 ed_newline(EditLine *el, int c)
    573 {
    574 
    575 	re_goto_bottom(el);
    576 	*el->el_line.lastchar++ = '\n';
    577 	*el->el_line.lastchar = '\0';
    578 	if (el->el_map.type == MAP_VI)
    579 		el->el_chared.c_vcmd.ins = el->el_line.buffer;
    580 	return (CC_NEWLINE);
    581 }
    582 
    583 
    584 /* ed_delete_prev_char():
    585  *	Delete the character to the left of the cursor
    586  *	[^?]
    587  */
    588 protected el_action_t
    589 /*ARGSUSED*/
    590 ed_delete_prev_char(EditLine *el, int c)
    591 {
    592 
    593 	if (el->el_line.cursor <= el->el_line.buffer)
    594 		return (CC_ERROR);
    595 
    596 	c_delbefore(el, el->el_state.argument);
    597 	el->el_line.cursor -= el->el_state.argument;
    598 	if (el->el_line.cursor < el->el_line.buffer)
    599 		el->el_line.cursor = el->el_line.buffer;
    600 	return (CC_REFRESH);
    601 }
    602 
    603 
    604 /* ed_clear_screen():
    605  *	Clear screen leaving current line at the top
    606  *	[^L]
    607  */
    608 protected el_action_t
    609 /*ARGSUSED*/
    610 ed_clear_screen(EditLine *el, int c)
    611 {
    612 
    613 	term_clear_screen(el);	/* clear the whole real screen */
    614 	re_clear_display(el);	/* reset everything */
    615 	return (CC_REFRESH);
    616 }
    617 
    618 
    619 /* ed_redisplay():
    620  *	Redisplay everything
    621  *	^R
    622  */
    623 protected el_action_t
    624 /*ARGSUSED*/
    625 ed_redisplay(EditLine *el, int c)
    626 {
    627 
    628 	return (CC_REDISPLAY);
    629 }
    630 
    631 
    632 /* ed_start_over():
    633  *	Erase current line and start from scratch
    634  *	[^G]
    635  */
    636 protected el_action_t
    637 /*ARGSUSED*/
    638 ed_start_over(EditLine *el, int c)
    639 {
    640 
    641 	ch_reset(el);
    642 	return (CC_REFRESH);
    643 }
    644 
    645 
    646 /* ed_sequence_lead_in():
    647  *	First character in a bound sequence
    648  *	Placeholder for external keys
    649  */
    650 protected el_action_t
    651 /*ARGSUSED*/
    652 ed_sequence_lead_in(EditLine *el, int c)
    653 {
    654 
    655 	return (CC_NORM);
    656 }
    657 
    658 
    659 /* ed_prev_history():
    660  *	Move to the previous history line
    661  *	[^P] [k]
    662  */
    663 protected el_action_t
    664 /*ARGSUSED*/
    665 ed_prev_history(EditLine *el, int c)
    666 {
    667 	char beep = 0;
    668 
    669 	el->el_chared.c_undo.action = NOP;
    670 	*el->el_line.lastchar = '\0';		/* just in case */
    671 
    672 	if (el->el_history.eventno == 0) {	/* save the current buffer
    673 						 * away */
    674 		(void) strncpy(el->el_history.buf, el->el_line.buffer,
    675 		    EL_BUFSIZ);
    676 		el->el_history.last = el->el_history.buf +
    677 		    (el->el_line.lastchar - el->el_line.buffer);
    678 	}
    679 	el->el_history.eventno += el->el_state.argument;
    680 
    681 	if (hist_get(el) == CC_ERROR) {
    682 		beep = 1;
    683 		/* el->el_history.eventno was fixed by first call */
    684 		(void) hist_get(el);
    685 	}
    686 	re_refresh(el);
    687 	if (beep)
    688 		return (CC_ERROR);
    689 	else
    690 		return (CC_NORM);	/* was CC_UP_HIST */
    691 }
    692 
    693 
    694 /* ed_next_history():
    695  *	Move to the next history line
    696  *	[^N] [j]
    697  */
    698 protected el_action_t
    699 /*ARGSUSED*/
    700 ed_next_history(EditLine *el, int c)
    701 {
    702 
    703 	el->el_chared.c_undo.action = NOP;
    704 	*el->el_line.lastchar = '\0';	/* just in case */
    705 
    706 	el->el_history.eventno -= el->el_state.argument;
    707 
    708 	if (el->el_history.eventno < 0) {
    709 		el->el_history.eventno = 0;
    710 		return (CC_ERROR);/* make it beep */
    711 	}
    712 	return (hist_get(el));
    713 }
    714 
    715 
    716 /* ed_search_prev_history():
    717  *	Search previous in history for a line matching the current
    718  *	next search history [M-P] [K]
    719  */
    720 protected el_action_t
    721 /*ARGSUSED*/
    722 ed_search_prev_history(EditLine *el, int c)
    723 {
    724 	const char *hp;
    725 	int h;
    726 	bool_t found = 0;
    727 
    728 	el->el_chared.c_vcmd.action = NOP;
    729 	el->el_chared.c_undo.action = NOP;
    730 	*el->el_line.lastchar = '\0';	/* just in case */
    731 	if (el->el_history.eventno < 0) {
    732 #ifdef DEBUG_EDIT
    733 		(void) fprintf(el->el_errfile,
    734 		    "e_prev_search_hist(): eventno < 0;\n");
    735 #endif
    736 		el->el_history.eventno = 0;
    737 		return (CC_ERROR);
    738 	}
    739 	if (el->el_history.eventno == 0) {
    740 		(void) strncpy(el->el_history.buf, el->el_line.buffer,
    741 		    EL_BUFSIZ);
    742 		el->el_history.last = el->el_history.buf +
    743 		    (el->el_line.lastchar - el->el_line.buffer);
    744 	}
    745 	if (el->el_history.ref == NULL)
    746 		return (CC_ERROR);
    747 
    748 	hp = HIST_FIRST(el);
    749 	if (hp == NULL)
    750 		return (CC_ERROR);
    751 
    752 	c_setpat(el);		/* Set search pattern !! */
    753 
    754 	for (h = 1; h <= el->el_history.eventno; h++)
    755 		hp = HIST_NEXT(el);
    756 
    757 	while (hp != NULL) {
    758 #ifdef SDEBUG
    759 		(void) fprintf(el->el_errfile, "Comparing with \"%s\"\n", hp);
    760 #endif
    761 		if ((strncmp(hp, el->el_line.buffer, (size_t)
    762 			    (el->el_line.lastchar - el->el_line.buffer)) ||
    763 			hp[el->el_line.lastchar - el->el_line.buffer]) &&
    764 		    c_hmatch(el, hp)) {
    765 			found++;
    766 			break;
    767 		}
    768 		h++;
    769 		hp = HIST_NEXT(el);
    770 	}
    771 
    772 	if (!found) {
    773 #ifdef SDEBUG
    774 		(void) fprintf(el->el_errfile, "not found\n");
    775 #endif
    776 		return (CC_ERROR);
    777 	}
    778 	el->el_history.eventno = h;
    779 
    780 	return (hist_get(el));
    781 }
    782 
    783 
    784 /* ed_search_next_history():
    785  *	Search next in history for a line matching the current
    786  *	[M-N] [J]
    787  */
    788 protected el_action_t
    789 /*ARGSUSED*/
    790 ed_search_next_history(EditLine *el, int c)
    791 {
    792 	const char *hp;
    793 	int h;
    794 	bool_t found = 0;
    795 
    796 	el->el_chared.c_vcmd.action = NOP;
    797 	el->el_chared.c_undo.action = NOP;
    798 	*el->el_line.lastchar = '\0';	/* just in case */
    799 
    800 	if (el->el_history.eventno == 0)
    801 		return (CC_ERROR);
    802 
    803 	if (el->el_history.ref == NULL)
    804 		return (CC_ERROR);
    805 
    806 	hp = HIST_FIRST(el);
    807 	if (hp == NULL)
    808 		return (CC_ERROR);
    809 
    810 	c_setpat(el);		/* Set search pattern !! */
    811 
    812 	for (h = 1; h < el->el_history.eventno && hp; h++) {
    813 #ifdef SDEBUG
    814 		(void) fprintf(el->el_errfile, "Comparing with \"%s\"\n", hp);
    815 #endif
    816 		if ((strncmp(hp, el->el_line.buffer, (size_t)
    817 			    (el->el_line.lastchar - el->el_line.buffer)) ||
    818 			hp[el->el_line.lastchar - el->el_line.buffer]) &&
    819 		    c_hmatch(el, hp))
    820 			found = h;
    821 		hp = HIST_NEXT(el);
    822 	}
    823 
    824 	if (!found) {		/* is it the current history number? */
    825 		if (!c_hmatch(el, el->el_history.buf)) {
    826 #ifdef SDEBUG
    827 			(void) fprintf(el->el_errfile, "not found\n");
    828 #endif
    829 			return (CC_ERROR);
    830 		}
    831 	}
    832 	el->el_history.eventno = found;
    833 
    834 	return (hist_get(el));
    835 }
    836 
    837 
    838 /* ed_prev_line():
    839  *	Move up one line
    840  *	Could be [k] [^p]
    841  */
    842 protected el_action_t
    843 /*ARGSUSED*/
    844 ed_prev_line(EditLine *el, int c)
    845 {
    846 	char *ptr;
    847 	int nchars = c_hpos(el);
    848 
    849 	/*
    850          * Move to the line requested
    851          */
    852 	if (*(ptr = el->el_line.cursor) == '\n')
    853 		ptr--;
    854 
    855 	for (; ptr >= el->el_line.buffer; ptr--)
    856 		if (*ptr == '\n' && --el->el_state.argument <= 0)
    857 			break;
    858 
    859 	if (el->el_state.argument > 0)
    860 		return (CC_ERROR);
    861 
    862 	/*
    863          * Move to the beginning of the line
    864          */
    865 	for (ptr--; ptr >= el->el_line.buffer && *ptr != '\n'; ptr--)
    866 		continue;
    867 
    868 	/*
    869          * Move to the character requested
    870          */
    871 	for (ptr++;
    872 	    nchars-- > 0 && ptr < el->el_line.lastchar && *ptr != '\n';
    873 	    ptr++)
    874 		continue;
    875 
    876 	el->el_line.cursor = ptr;
    877 	return (CC_CURSOR);
    878 }
    879 
    880 
    881 /* ed_next_line():
    882  *	Move down one line
    883  *	Could be [j] [^n]
    884  */
    885 protected el_action_t
    886 /*ARGSUSED*/
    887 ed_next_line(EditLine *el, int c)
    888 {
    889 	char *ptr;
    890 	int nchars = c_hpos(el);
    891 
    892 	/*
    893          * Move to the line requested
    894          */
    895 	for (ptr = el->el_line.cursor; ptr < el->el_line.lastchar; ptr++)
    896 		if (*ptr == '\n' && --el->el_state.argument <= 0)
    897 			break;
    898 
    899 	if (el->el_state.argument > 0)
    900 		return (CC_ERROR);
    901 
    902 	/*
    903          * Move to the character requested
    904          */
    905 	for (ptr++;
    906 	    nchars-- > 0 && ptr < el->el_line.lastchar && *ptr != '\n';
    907 	    ptr++)
    908 		continue;
    909 
    910 	el->el_line.cursor = ptr;
    911 	return (CC_CURSOR);
    912 }
    913 
    914 
    915 /* ed_command():
    916  *	Editline extended command
    917  *	[M-X] [:]
    918  */
    919 protected el_action_t
    920 /*ARGSUSED*/
    921 ed_command(EditLine *el, int c)
    922 {
    923 	char tmpbuf[EL_BUFSIZ];
    924 	int tmplen;
    925 
    926 	el->el_line.buffer[0] = '\0';
    927 	el->el_line.lastchar = el->el_line.buffer;
    928 	el->el_line.cursor = el->el_line.buffer;
    929 
    930 	c_insert(el, 3);	/* prompt + ": " */
    931 	*el->el_line.cursor++ = '\n';
    932 	*el->el_line.cursor++ = ':';
    933 	*el->el_line.cursor++ = ' ';
    934 	re_refresh(el);
    935 
    936 	tmplen = c_gets(el, tmpbuf);
    937 	tmpbuf[tmplen] = '\0';
    938 
    939 	el->el_line.buffer[0] = '\0';
    940 	el->el_line.lastchar = el->el_line.buffer;
    941 	el->el_line.cursor = el->el_line.buffer;
    942 
    943 	if (parse_line(el, tmpbuf) == -1)
    944 		return (CC_ERROR);
    945 	else
    946 		return (CC_REFRESH);
    947 }
    948