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common.c revision 1.36 
      1 /*	$NetBSD: common.c,v 1.36 2016/02/16 19:11:25 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 1.36 2016/02/16 19:11:25 christos Exp $");
     41 #endif
     42 #endif /* not lint && not SCCSID */
     43 
     44 /*
     45  * common.c: Common Editor functions
     46  */
     47 #include "el.h"
     48 #include "common.h"
     49 #include "parse.h"
     50 #include "vi.h"
     51 
     52 /* ed_end_of_file():
     53  *	Indicate end of file
     54  *	[^D]
     55  */
     56 protected el_action_t
     57 /*ARGSUSED*/
     58 ed_end_of_file(EditLine *el, wint_t c __attribute__((__unused__)))
     59 {
     60 
     61 	re_goto_bottom(el);
     62 	*el->el_line.lastchar = '\0';
     63 	return CC_EOF;
     64 }
     65 
     66 
     67 /* ed_insert():
     68  *	Add character to the line
     69  *	Insert a character [bound to all insert keys]
     70  */
     71 protected el_action_t
     72 ed_insert(EditLine *el, wint_t c)
     73 {
     74 	int count = el->el_state.argument;
     75 
     76 	if (c == '\0')
     77 		return CC_ERROR;
     78 
     79 	if (el->el_line.lastchar + el->el_state.argument >=
     80 	    el->el_line.limit) {
     81 		/* end of buffer space, try to allocate more */
     82 		if (!ch_enlargebufs(el, (size_t) count))
     83 			return CC_ERROR;	/* error allocating more */
     84 	}
     85 
     86 	if (count == 1) {
     87 		if (el->el_state.inputmode == MODE_INSERT
     88 		    || el->el_line.cursor >= el->el_line.lastchar)
     89 			c_insert(el, 1);
     90 
     91 		*el->el_line.cursor++ = (Char)c;
     92 		re_fastaddc(el);		/* fast refresh for one char. */
     93 	} else {
     94 		if (el->el_state.inputmode != MODE_REPLACE_1)
     95 			c_insert(el, el->el_state.argument);
     96 
     97 		while (count-- && el->el_line.cursor < el->el_line.lastchar)
     98 			*el->el_line.cursor++ = (Char)c;
     99 		re_refresh(el);
    100 	}
    101 
    102 	if (el->el_state.inputmode == MODE_REPLACE_1)
    103 		return vi_command_mode(el, 0);
    104 
    105 	return CC_NORM;
    106 }
    107 
    108 
    109 /* ed_delete_prev_word():
    110  *	Delete from beginning of current word to cursor
    111  *	[M-^?] [^W]
    112  */
    113 protected el_action_t
    114 /*ARGSUSED*/
    115 ed_delete_prev_word(EditLine *el, wint_t c __attribute__((__unused__)))
    116 {
    117 	Char *cp, *p, *kp;
    118 
    119 	if (el->el_line.cursor == el->el_line.buffer)
    120 		return CC_ERROR;
    121 
    122 	cp = c__prev_word(el->el_line.cursor, el->el_line.buffer,
    123 	    el->el_state.argument, ce__isword);
    124 
    125 	for (p = cp, kp = el->el_chared.c_kill.buf; p < el->el_line.cursor; p++)
    126 		*kp++ = *p;
    127 	el->el_chared.c_kill.last = kp;
    128 
    129 	c_delbefore(el, (int)(el->el_line.cursor - cp));/* delete before dot */
    130 	el->el_line.cursor = cp;
    131 	if (el->el_line.cursor < el->el_line.buffer)
    132 		el->el_line.cursor = el->el_line.buffer; /* bounds check */
    133 	return CC_REFRESH;
    134 }
    135 
    136 
    137 /* ed_delete_next_char():
    138  *	Delete character under cursor
    139  *	[^D] [x]
    140  */
    141 protected el_action_t
    142 /*ARGSUSED*/
    143 ed_delete_next_char(EditLine *el, wint_t c __attribute__((__unused__)))
    144 {
    145 #ifdef DEBUG_EDIT
    146 #define	EL	el->el_line
    147 	(void) fprintf(el->el_errlfile,
    148 	    "\nD(b: %x(%s)  c: %x(%s) last: %x(%s) limit: %x(%s)\n",
    149 	    EL.buffer, EL.buffer, EL.cursor, EL.cursor, EL.lastchar,
    150 	    EL.lastchar, EL.limit, EL.limit);
    151 #endif
    152 	if (el->el_line.cursor == el->el_line.lastchar) {
    153 			/* if I'm at the end */
    154 		if (el->el_map.type == MAP_VI) {
    155 			if (el->el_line.cursor == el->el_line.buffer) {
    156 				/* if I'm also at the beginning */
    157 #ifdef KSHVI
    158 				return CC_ERROR;
    159 #else
    160 				/* then do an EOF */
    161 				terminal_writec(el, c);
    162 				return CC_EOF;
    163 #endif
    164 			} else {
    165 #ifdef KSHVI
    166 				el->el_line.cursor--;
    167 #else
    168 				return CC_ERROR;
    169 #endif
    170 			}
    171 		} else
    172 				return CC_ERROR;
    173 	}
    174 	c_delafter(el, el->el_state.argument);	/* delete after dot */
    175 	if (el->el_map.type == MAP_VI &&
    176 	    el->el_line.cursor >= el->el_line.lastchar &&
    177 	    el->el_line.cursor > el->el_line.buffer)
    178 			/* bounds check */
    179 		el->el_line.cursor = el->el_line.lastchar - 1;
    180 	return CC_REFRESH;
    181 }
    182 
    183 
    184 /* ed_kill_line():
    185  *	Cut to the end of line
    186  *	[^K] [^K]
    187  */
    188 protected el_action_t
    189 /*ARGSUSED*/
    190 ed_kill_line(EditLine *el, wint_t c __attribute__((__unused__)))
    191 {
    192 	Char *kp, *cp;
    193 
    194 	cp = el->el_line.cursor;
    195 	kp = el->el_chared.c_kill.buf;
    196 	while (cp < el->el_line.lastchar)
    197 		*kp++ = *cp++;	/* copy it */
    198 	el->el_chared.c_kill.last = kp;
    199 			/* zap! -- delete to end */
    200 	el->el_line.lastchar = el->el_line.cursor;
    201 	return CC_REFRESH;
    202 }
    203 
    204 
    205 /* ed_move_to_end():
    206  *	Move cursor to the end of line
    207  *	[^E] [^E]
    208  */
    209 protected el_action_t
    210 /*ARGSUSED*/
    211 ed_move_to_end(EditLine *el, wint_t c __attribute__((__unused__)))
    212 {
    213 
    214 	el->el_line.cursor = el->el_line.lastchar;
    215 	if (el->el_map.type == MAP_VI) {
    216 		if (el->el_chared.c_vcmd.action != NOP) {
    217 			cv_delfini(el);
    218 			return CC_REFRESH;
    219 		}
    220 #ifdef VI_MOVE
    221 		el->el_line.cursor--;
    222 #endif
    223 	}
    224 	return CC_CURSOR;
    225 }
    226 
    227 
    228 /* ed_move_to_beg():
    229  *	Move cursor to the beginning of line
    230  *	[^A] [^A]
    231  */
    232 protected el_action_t
    233 /*ARGSUSED*/
    234 ed_move_to_beg(EditLine *el, wint_t c __attribute__((__unused__)))
    235 {
    236 
    237 	el->el_line.cursor = el->el_line.buffer;
    238 
    239 	if (el->el_map.type == MAP_VI) {
    240 			/* We want FIRST non space character */
    241 		while (Isspace(*el->el_line.cursor))
    242 			el->el_line.cursor++;
    243 		if (el->el_chared.c_vcmd.action != NOP) {
    244 			cv_delfini(el);
    245 			return CC_REFRESH;
    246 		}
    247 	}
    248 	return CC_CURSOR;
    249 }
    250 
    251 
    252 /* ed_transpose_chars():
    253  *	Exchange the character to the left of the cursor with the one under it
    254  *	[^T] [^T]
    255  */
    256 protected el_action_t
    257 ed_transpose_chars(EditLine *el, wint_t c)
    258 {
    259 
    260 	if (el->el_line.cursor < el->el_line.lastchar) {
    261 		if (el->el_line.lastchar <= &el->el_line.buffer[1])
    262 			return CC_ERROR;
    263 		else
    264 			el->el_line.cursor++;
    265 	}
    266 	if (el->el_line.cursor > &el->el_line.buffer[1]) {
    267 		/* must have at least two chars entered */
    268 		c = el->el_line.cursor[-2];
    269 		el->el_line.cursor[-2] = el->el_line.cursor[-1];
    270 		el->el_line.cursor[-1] = (Char)c;
    271 		return CC_REFRESH;
    272 	} else
    273 		return CC_ERROR;
    274 }
    275 
    276 
    277 /* ed_next_char():
    278  *	Move to the right one character
    279  *	[^F] [^F]
    280  */
    281 protected el_action_t
    282 /*ARGSUSED*/
    283 ed_next_char(EditLine *el, wint_t c __attribute__((__unused__)))
    284 {
    285 	Char *lim = el->el_line.lastchar;
    286 
    287 	if (el->el_line.cursor >= lim ||
    288 	    (el->el_line.cursor == lim - 1 &&
    289 	    el->el_map.type == MAP_VI &&
    290 	    el->el_chared.c_vcmd.action == NOP))
    291 		return CC_ERROR;
    292 
    293 	el->el_line.cursor += el->el_state.argument;
    294 	if (el->el_line.cursor > lim)
    295 		el->el_line.cursor = lim;
    296 
    297 	if (el->el_map.type == MAP_VI)
    298 		if (el->el_chared.c_vcmd.action != NOP) {
    299 			cv_delfini(el);
    300 			return CC_REFRESH;
    301 		}
    302 	return CC_CURSOR;
    303 }
    304 
    305 
    306 /* ed_prev_word():
    307  *	Move to the beginning of the current word
    308  *	[M-b] [b]
    309  */
    310 protected el_action_t
    311 /*ARGSUSED*/
    312 ed_prev_word(EditLine *el, wint_t c __attribute__((__unused__)))
    313 {
    314 
    315 	if (el->el_line.cursor == el->el_line.buffer)
    316 		return CC_ERROR;
    317 
    318 	el->el_line.cursor = c__prev_word(el->el_line.cursor,
    319 	    el->el_line.buffer,
    320 	    el->el_state.argument,
    321 	    ce__isword);
    322 
    323 	if (el->el_map.type == MAP_VI)
    324 		if (el->el_chared.c_vcmd.action != NOP) {
    325 			cv_delfini(el);
    326 			return CC_REFRESH;
    327 		}
    328 	return CC_CURSOR;
    329 }
    330 
    331 
    332 /* ed_prev_char():
    333  *	Move to the left one character
    334  *	[^B] [^B]
    335  */
    336 protected el_action_t
    337 /*ARGSUSED*/
    338 ed_prev_char(EditLine *el, wint_t c __attribute__((__unused__)))
    339 {
    340 
    341 	if (el->el_line.cursor > el->el_line.buffer) {
    342 		el->el_line.cursor -= el->el_state.argument;
    343 		if (el->el_line.cursor < el->el_line.buffer)
    344 			el->el_line.cursor = el->el_line.buffer;
    345 
    346 		if (el->el_map.type == MAP_VI)
    347 			if (el->el_chared.c_vcmd.action != NOP) {
    348 				cv_delfini(el);
    349 				return CC_REFRESH;
    350 			}
    351 		return CC_CURSOR;
    352 	} else
    353 		return CC_ERROR;
    354 }
    355 
    356 
    357 /* ed_quoted_insert():
    358  *	Add the next character typed verbatim
    359  *	[^V] [^V]
    360  */
    361 protected el_action_t
    362 ed_quoted_insert(EditLine *el, wint_t c)
    363 {
    364 	int num;
    365 	Char tc;
    366 
    367 	tty_quotemode(el);
    368 	num = FUN(el,getc)(el, &tc);
    369 	c = tc;
    370 	tty_noquotemode(el);
    371 	if (num == 1)
    372 		return ed_insert(el, c);
    373 	else
    374 		return ed_end_of_file(el, 0);
    375 }
    376 
    377 
    378 /* ed_digit():
    379  *	Adds to argument or enters a digit
    380  */
    381 protected el_action_t
    382 ed_digit(EditLine *el, wint_t c)
    383 {
    384 
    385 	if (!Isdigit(c))
    386 		return CC_ERROR;
    387 
    388 	if (el->el_state.doingarg) {
    389 			/* if doing an arg, add this in... */
    390 		if (el->el_state.lastcmd == EM_UNIVERSAL_ARGUMENT)
    391 			el->el_state.argument = c - '0';
    392 		else {
    393 			if (el->el_state.argument > 1000000)
    394 				return CC_ERROR;
    395 			el->el_state.argument =
    396 			    (el->el_state.argument * 10) + (c - '0');
    397 		}
    398 		return CC_ARGHACK;
    399 	}
    400 
    401 	return ed_insert(el, c);
    402 }
    403 
    404 
    405 /* ed_argument_digit():
    406  *	Digit that starts argument
    407  *	For ESC-n
    408  */
    409 protected el_action_t
    410 ed_argument_digit(EditLine *el, wint_t c)
    411 {
    412 
    413 	if (!Isdigit(c))
    414 		return CC_ERROR;
    415 
    416 	if (el->el_state.doingarg) {
    417 		if (el->el_state.argument > 1000000)
    418 			return CC_ERROR;
    419 		el->el_state.argument = (el->el_state.argument * 10) +
    420 		    (c - '0');
    421 	} else {		/* else starting an argument */
    422 		el->el_state.argument = c - '0';
    423 		el->el_state.doingarg = 1;
    424 	}
    425 	return CC_ARGHACK;
    426 }
    427 
    428 
    429 /* ed_unassigned():
    430  *	Indicates unbound character
    431  *	Bound to keys that are not assigned
    432  */
    433 protected el_action_t
    434 /*ARGSUSED*/
    435 ed_unassigned(EditLine *el __attribute__((__unused__)),
    436     wint_t c __attribute__((__unused__)))
    437 {
    438 
    439 	return CC_ERROR;
    440 }
    441 
    442 
    443 /**
    444  ** TTY key handling.
    445  **/
    446 
    447 /* ed_tty_sigint():
    448  *	Tty interrupt character
    449  *	[^C]
    450  */
    451 protected el_action_t
    452 /*ARGSUSED*/
    453 ed_tty_sigint(EditLine *el __attribute__((__unused__)),
    454 	      wint_t c __attribute__((__unused__)))
    455 {
    456 
    457 	return CC_NORM;
    458 }
    459 
    460 
    461 /* ed_tty_dsusp():
    462  *	Tty delayed suspend character
    463  *	[^Y]
    464  */
    465 protected el_action_t
    466 /*ARGSUSED*/
    467 ed_tty_dsusp(EditLine *el __attribute__((__unused__)),
    468 	     wint_t c __attribute__((__unused__)))
    469 {
    470 
    471 	return CC_NORM;
    472 }
    473 
    474 
    475 /* ed_tty_flush_output():
    476  *	Tty flush output characters
    477  *	[^O]
    478  */
    479 protected el_action_t
    480 /*ARGSUSED*/
    481 ed_tty_flush_output(EditLine *el __attribute__((__unused__)),
    482 		    wint_t c __attribute__((__unused__)))
    483 {
    484 
    485 	return CC_NORM;
    486 }
    487 
    488 
    489 /* ed_tty_sigquit():
    490  *	Tty quit character
    491  *	[^\]
    492  */
    493 protected el_action_t
    494 /*ARGSUSED*/
    495 ed_tty_sigquit(EditLine *el __attribute__((__unused__)),
    496 	       wint_t c __attribute__((__unused__)))
    497 {
    498 
    499 	return CC_NORM;
    500 }
    501 
    502 
    503 /* ed_tty_sigtstp():
    504  *	Tty suspend character
    505  *	[^Z]
    506  */
    507 protected el_action_t
    508 /*ARGSUSED*/
    509 ed_tty_sigtstp(EditLine *el __attribute__((__unused__)),
    510 	       wint_t c __attribute__((__unused__)))
    511 {
    512 
    513 	return CC_NORM;
    514 }
    515 
    516 
    517 /* ed_tty_stop_output():
    518  *	Tty disallow output characters
    519  *	[^S]
    520  */
    521 protected el_action_t
    522 /*ARGSUSED*/
    523 ed_tty_stop_output(EditLine *el __attribute__((__unused__)),
    524 		   wint_t c __attribute__((__unused__)))
    525 {
    526 
    527 	return CC_NORM;
    528 }
    529 
    530 
    531 /* ed_tty_start_output():
    532  *	Tty allow output characters
    533  *	[^Q]
    534  */
    535 protected el_action_t
    536 /*ARGSUSED*/
    537 ed_tty_start_output(EditLine *el __attribute__((__unused__)),
    538 		    wint_t c __attribute__((__unused__)))
    539 {
    540 
    541 	return CC_NORM;
    542 }
    543 
    544 
    545 /* ed_newline():
    546  *	Execute command
    547  *	[^J]
    548  */
    549 protected el_action_t
    550 /*ARGSUSED*/
    551 ed_newline(EditLine *el, wint_t c __attribute__((__unused__)))
    552 {
    553 
    554 	re_goto_bottom(el);
    555 	*el->el_line.lastchar++ = '\n';
    556 	*el->el_line.lastchar = '\0';
    557 	return CC_NEWLINE;
    558 }
    559 
    560 
    561 /* ed_delete_prev_char():
    562  *	Delete the character to the left of the cursor
    563  *	[^?]
    564  */
    565 protected el_action_t
    566 /*ARGSUSED*/
    567 ed_delete_prev_char(EditLine *el, wint_t c __attribute__((__unused__)))
    568 {
    569 
    570 	if (el->el_line.cursor <= el->el_line.buffer)
    571 		return CC_ERROR;
    572 
    573 	c_delbefore(el, el->el_state.argument);
    574 	el->el_line.cursor -= el->el_state.argument;
    575 	if (el->el_line.cursor < el->el_line.buffer)
    576 		el->el_line.cursor = el->el_line.buffer;
    577 	return CC_REFRESH;
    578 }
    579 
    580 
    581 /* ed_clear_screen():
    582  *	Clear screen leaving current line at the top
    583  *	[^L]
    584  */
    585 protected el_action_t
    586 /*ARGSUSED*/
    587 ed_clear_screen(EditLine *el, wint_t c __attribute__((__unused__)))
    588 {
    589 
    590 	terminal_clear_screen(el);	/* clear the whole real screen */
    591 	re_clear_display(el);	/* reset everything */
    592 	return CC_REFRESH;
    593 }
    594 
    595 
    596 /* ed_redisplay():
    597  *	Redisplay everything
    598  *	^R
    599  */
    600 protected el_action_t
    601 /*ARGSUSED*/
    602 ed_redisplay(EditLine *el __attribute__((__unused__)),
    603 	     wint_t c __attribute__((__unused__)))
    604 {
    605 
    606 	return CC_REDISPLAY;
    607 }
    608 
    609 
    610 /* ed_start_over():
    611  *	Erase current line and start from scratch
    612  *	[^G]
    613  */
    614 protected el_action_t
    615 /*ARGSUSED*/
    616 ed_start_over(EditLine *el, wint_t c __attribute__((__unused__)))
    617 {
    618 
    619 	ch_reset(el, 0);
    620 	return CC_REFRESH;
    621 }
    622 
    623 
    624 /* ed_sequence_lead_in():
    625  *	First character in a bound sequence
    626  *	Placeholder for external keys
    627  */
    628 protected el_action_t
    629 /*ARGSUSED*/
    630 ed_sequence_lead_in(EditLine *el __attribute__((__unused__)),
    631 		    wint_t c __attribute__((__unused__)))
    632 {
    633 
    634 	return CC_NORM;
    635 }
    636 
    637 
    638 /* ed_prev_history():
    639  *	Move to the previous history line
    640  *	[^P] [k]
    641  */
    642 protected el_action_t
    643 /*ARGSUSED*/
    644 ed_prev_history(EditLine *el, wint_t c __attribute__((__unused__)))
    645 {
    646 	char beep = 0;
    647 	int sv_event = el->el_history.eventno;
    648 
    649 	el->el_chared.c_undo.len = -1;
    650 	*el->el_line.lastchar = '\0';		/* just in case */
    651 
    652 	if (el->el_history.eventno == 0) {	/* save the current buffer
    653 						 * away */
    654 		(void) Strncpy(el->el_history.buf, el->el_line.buffer,
    655 		    EL_BUFSIZ);
    656 		el->el_history.last = el->el_history.buf +
    657 		    (el->el_line.lastchar - el->el_line.buffer);
    658 	}
    659 	el->el_history.eventno += el->el_state.argument;
    660 
    661 	if (hist_get(el) == CC_ERROR) {
    662 		if (el->el_map.type == MAP_VI) {
    663 			el->el_history.eventno = sv_event;
    664 
    665 		}
    666 		beep = 1;
    667 		/* el->el_history.eventno was fixed by first call */
    668 		(void) hist_get(el);
    669 	}
    670 	if (beep)
    671 		return CC_REFRESH_BEEP;
    672 	return CC_REFRESH;
    673 }
    674 
    675 
    676 /* ed_next_history():
    677  *	Move to the next history line
    678  *	[^N] [j]
    679  */
    680 protected el_action_t
    681 /*ARGSUSED*/
    682 ed_next_history(EditLine *el, wint_t c __attribute__((__unused__)))
    683 {
    684 	el_action_t beep = CC_REFRESH, rval;
    685 
    686 	el->el_chared.c_undo.len = -1;
    687 	*el->el_line.lastchar = '\0';	/* just in case */
    688 
    689 	el->el_history.eventno -= el->el_state.argument;
    690 
    691 	if (el->el_history.eventno < 0) {
    692 		el->el_history.eventno = 0;
    693 		beep = CC_REFRESH_BEEP;
    694 	}
    695 	rval = hist_get(el);
    696 	if (rval == CC_REFRESH)
    697 		return beep;
    698 	return rval;
    699 
    700 }
    701 
    702 
    703 /* ed_search_prev_history():
    704  *	Search previous in history for a line matching the current
    705  *	next search history [M-P] [K]
    706  */
    707 protected el_action_t
    708 /*ARGSUSED*/
    709 ed_search_prev_history(EditLine *el, wint_t c __attribute__((__unused__)))
    710 {
    711 	const Char *hp;
    712 	int h;
    713 	int found = 0;
    714 
    715 	el->el_chared.c_vcmd.action = NOP;
    716 	el->el_chared.c_undo.len = -1;
    717 	*el->el_line.lastchar = '\0';	/* just in case */
    718 	if (el->el_history.eventno < 0) {
    719 #ifdef DEBUG_EDIT
    720 		(void) fprintf(el->el_errfile,
    721 		    "e_prev_search_hist(): eventno < 0;\n");
    722 #endif
    723 		el->el_history.eventno = 0;
    724 		return CC_ERROR;
    725 	}
    726 	if (el->el_history.eventno == 0) {
    727 		(void) Strncpy(el->el_history.buf, el->el_line.buffer,
    728 		    EL_BUFSIZ);
    729 		el->el_history.last = el->el_history.buf +
    730 		    (el->el_line.lastchar - el->el_line.buffer);
    731 	}
    732 	if (el->el_history.ref == NULL)
    733 		return CC_ERROR;
    734 
    735 	hp = HIST_FIRST(el);
    736 	if (hp == NULL)
    737 		return CC_ERROR;
    738 
    739 	c_setpat(el);		/* Set search pattern !! */
    740 
    741 	for (h = 1; h <= el->el_history.eventno; h++)
    742 		hp = HIST_NEXT(el);
    743 
    744 	while (hp != NULL) {
    745 #ifdef SDEBUG
    746 		(void) fprintf(el->el_errfile, "Comparing with \"%s\"\n", hp);
    747 #endif
    748 		if ((Strncmp(hp, el->el_line.buffer, (size_t)
    749 			    (el->el_line.lastchar - el->el_line.buffer)) ||
    750 			hp[el->el_line.lastchar - el->el_line.buffer]) &&
    751 		    c_hmatch(el, hp)) {
    752 			found = 1;
    753 			break;
    754 		}
    755 		h++;
    756 		hp = HIST_NEXT(el);
    757 	}
    758 
    759 	if (!found) {
    760 #ifdef SDEBUG
    761 		(void) fprintf(el->el_errfile, "not found\n");
    762 #endif
    763 		return CC_ERROR;
    764 	}
    765 	el->el_history.eventno = h;
    766 
    767 	return hist_get(el);
    768 }
    769 
    770 
    771 /* ed_search_next_history():
    772  *	Search next in history for a line matching the current
    773  *	[M-N] [J]
    774  */
    775 protected el_action_t
    776 /*ARGSUSED*/
    777 ed_search_next_history(EditLine *el, wint_t c __attribute__((__unused__)))
    778 {
    779 	const Char *hp;
    780 	int h;
    781 	int found = 0;
    782 
    783 	el->el_chared.c_vcmd.action = NOP;
    784 	el->el_chared.c_undo.len = -1;
    785 	*el->el_line.lastchar = '\0';	/* just in case */
    786 
    787 	if (el->el_history.eventno == 0)
    788 		return CC_ERROR;
    789 
    790 	if (el->el_history.ref == NULL)
    791 		return CC_ERROR;
    792 
    793 	hp = HIST_FIRST(el);
    794 	if (hp == NULL)
    795 		return CC_ERROR;
    796 
    797 	c_setpat(el);		/* Set search pattern !! */
    798 
    799 	for (h = 1; h < el->el_history.eventno && hp; h++) {
    800 #ifdef SDEBUG
    801 		(void) fprintf(el->el_errfile, "Comparing with \"%s\"\n", hp);
    802 #endif
    803 		if ((Strncmp(hp, el->el_line.buffer, (size_t)
    804 			    (el->el_line.lastchar - el->el_line.buffer)) ||
    805 			hp[el->el_line.lastchar - el->el_line.buffer]) &&
    806 		    c_hmatch(el, hp))
    807 			found = h;
    808 		hp = HIST_NEXT(el);
    809 	}
    810 
    811 	if (!found) {		/* is it the current history number? */
    812 		if (!c_hmatch(el, el->el_history.buf)) {
    813 #ifdef SDEBUG
    814 			(void) fprintf(el->el_errfile, "not found\n");
    815 #endif
    816 			return CC_ERROR;
    817 		}
    818 	}
    819 	el->el_history.eventno = found;
    820 
    821 	return hist_get(el);
    822 }
    823 
    824 
    825 /* ed_prev_line():
    826  *	Move up one line
    827  *	Could be [k] [^p]
    828  */
    829 protected el_action_t
    830 /*ARGSUSED*/
    831 ed_prev_line(EditLine *el, wint_t c __attribute__((__unused__)))
    832 {
    833 	Char *ptr;
    834 	int nchars = c_hpos(el);
    835 
    836 	/*
    837          * Move to the line requested
    838          */
    839 	if (*(ptr = el->el_line.cursor) == '\n')
    840 		ptr--;
    841 
    842 	for (; ptr >= el->el_line.buffer; ptr--)
    843 		if (*ptr == '\n' && --el->el_state.argument <= 0)
    844 			break;
    845 
    846 	if (el->el_state.argument > 0)
    847 		return CC_ERROR;
    848 
    849 	/*
    850          * Move to the beginning of the line
    851          */
    852 	for (ptr--; ptr >= el->el_line.buffer && *ptr != '\n'; ptr--)
    853 		continue;
    854 
    855 	/*
    856          * Move to the character requested
    857          */
    858 	for (ptr++;
    859 	    nchars-- > 0 && ptr < el->el_line.lastchar && *ptr != '\n';
    860 	    ptr++)
    861 		continue;
    862 
    863 	el->el_line.cursor = ptr;
    864 	return CC_CURSOR;
    865 }
    866 
    867 
    868 /* ed_next_line():
    869  *	Move down one line
    870  *	Could be [j] [^n]
    871  */
    872 protected el_action_t
    873 /*ARGSUSED*/
    874 ed_next_line(EditLine *el, wint_t c __attribute__((__unused__)))
    875 {
    876 	Char *ptr;
    877 	int nchars = c_hpos(el);
    878 
    879 	/*
    880          * Move to the line requested
    881          */
    882 	for (ptr = el->el_line.cursor; ptr < el->el_line.lastchar; ptr++)
    883 		if (*ptr == '\n' && --el->el_state.argument <= 0)
    884 			break;
    885 
    886 	if (el->el_state.argument > 0)
    887 		return CC_ERROR;
    888 
    889 	/*
    890          * Move to the character requested
    891          */
    892 	for (ptr++;
    893 	    nchars-- > 0 && ptr < el->el_line.lastchar && *ptr != '\n';
    894 	    ptr++)
    895 		continue;
    896 
    897 	el->el_line.cursor = ptr;
    898 	return CC_CURSOR;
    899 }
    900 
    901 
    902 /* ed_command():
    903  *	Editline extended command
    904  *	[M-X] [:]
    905  */
    906 protected el_action_t
    907 /*ARGSUSED*/
    908 ed_command(EditLine *el, wint_t c __attribute__((__unused__)))
    909 {
    910 	Char tmpbuf[EL_BUFSIZ];
    911 	int tmplen;
    912 
    913 	tmplen = c_gets(el, tmpbuf, STR("\n: "));
    914 	terminal__putc(el, '\n');
    915 
    916 	if (tmplen < 0 || (tmpbuf[tmplen] = 0, parse_line(el, tmpbuf)) == -1)
    917 		terminal_beep(el);
    918 
    919 	el->el_map.current = el->el_map.key;
    920 	re_clear_display(el);
    921 	return CC_REFRESH;
    922 }
    923