2 * Copyright (c) 1992, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 1992, 1993, 1994, 1995, 1996
5 * Keith Bostic. All rights reserved.
7 * See the LICENSE file for redistribution information.
13 static const char sccsid
[] = "$Id: v_search.c,v 10.27 2000/09/02 13:14:16 skimo Exp $ (Berkeley) $Date: 2000/09/02 13:14:16 $";
16 #include <sys/types.h>
17 #include <sys/queue.h>
20 #include <bitstring.h>
28 #include "../common/common.h"
30 #include "../ipc/ip.h"
32 static int v_exaddr
__P((SCR
*, VICMD
*, dir_t
));
33 static int v_search
__P((SCR
*, VICMD
*, CHAR_T
*, size_t, u_int
, dir_t
));
36 * v_srch -- [count]?RE[? offset]
37 * Ex address search backward.
39 * PUBLIC: int v_searchb __P((SCR *, VICMD *));
46 return (v_exaddr(sp
, vp
, BACKWARD
));
50 * v_searchf -- [count]/RE[/ offset]
51 * Ex address search forward.
53 * PUBLIC: int v_searchf __P((SCR *, VICMD *));
60 return (v_exaddr(sp
, vp
, FORWARD
));
65 * Do a vi search (which is really an ex address).
73 static EXCMDLIST fake
= { "search" };
78 size_t len
, s_cno
, tlen
;
82 static CHAR_T plus
[] = { '+', 0 };
88 * If using the search command as a motion, any addressing components
89 * are lost, i.e. y/ptrn/+2, when repeated, is the same as y/ptrn/.
91 if (F_ISSET(vp
, VC_ISDOT
))
92 return (v_search(sp
, vp
,
93 NULL
, 0, SEARCH_PARSE
| SEARCH_MSG
| SEARCH_SET
, dir
));
95 /* Get the search pattern. */
96 if (v_tcmd(sp
, vp
, dir
== BACKWARD
? CH_BSEARCH
: CH_FSEARCH
,
97 TXT_BS
| TXT_CR
| TXT_ESCAPE
| TXT_PROMPT
|
98 (O_ISSET(sp
, O_SEARCHINCR
) ? TXT_SEARCHINCR
: 0)))
101 tp
= sp
->tiq
.cqh_first
;
103 /* If the user backspaced over the prompt, do nothing. */
104 if (tp
->term
== TERM_BS
)
108 * If the user was doing an incremental search, then we've already
109 * updated the cursor and moved to the right location. Return the
110 * correct values, we're done.
112 if (tp
->term
== TERM_SEARCH
) {
113 vp
->m_stop
.lno
= sp
->lno
;
114 vp
->m_stop
.cno
= sp
->cno
;
116 return (v_correct(sp
, vp
, 0));
117 vp
->m_final
= vp
->m_stop
;
122 * If the user entered <escape> or <carriage-return>, the length is
123 * 1 and the right thing will happen, i.e. the prompt will be used
124 * as a command character.
126 * Build a fake ex command structure.
129 wp
->excmd
.cp
= tp
->lb
;
130 wp
->excmd
.clen
= tp
->len
;
131 F_INIT(&wp
->excmd
, E_VISEARCH
);
135 * Warn if the search wraps. This is a pretty special case, but it's
136 * nice feature that wasn't in the original implementations of ex/vi.
137 * (It was added at some point to System V's version.) This message
138 * is only displayed if there are no keys in the queue. The problem is
139 * the command is going to succeed, and the message is informational,
140 * not an error. If a macro displays it repeatedly, e.g., the pattern
141 * only occurs once in the file and wrapscan is set, you lose big. For
142 * example, if the macro does something like:
144 * :map K /pattern/^MjK
146 * Each search will display the message, but the following "/pattern/"
147 * will immediately overwrite it, with strange results. The System V
148 * vi displays the "wrapped" message multiple times, but because it's
149 * overwritten each time, it's not as noticeable. As we don't discard
150 * messages, it's a real problem for us.
152 if (!KEYS_WAITING(sp
))
153 F_SET(&wp
->excmd
, E_SEARCH_WMSG
);
155 /* Save the current line/column. */
161 * Historically, vi / and ? commands were full-blown ex addresses,
162 * including ';' delimiters, trailing <blank>'s, multiple search
163 * strings (separated by semi-colons) and, finally, full-blown z
164 * commands after the / and ? search strings. (If the search was
165 * being used as a motion, the trailing z command was ignored.
166 * Also, we do some argument checking on the z command, to be sure
167 * that it's not some other random command.) For multiple search
168 * strings, leading <blank>'s at the second and subsequent strings
169 * were eaten as well. This has some (unintended?) side-effects:
170 * the command /ptrn/;3 is legal and results in moving to line 3.
171 * I suppose you could use it to optionally move to line 3...
174 * Historically, if any part of the search command failed, the cursor
175 * remained unmodified (even if ; was used). We have to play games
176 * because the underlying ex parser thinks we're modifying the cursor
177 * as we go, but I think we're compatible with historic practice.
180 * Historically, the command "/STRING/; " failed, apparently it
181 * confused the parser. We're not that compatible.
184 if (ex_range(sp
, cmdp
, &err
))
188 * Remember where any remaining command information is, and clean
189 * up the fake ex command.
198 /* Copy out the new cursor position and make sure it's okay. */
199 switch (cmdp
->addrcnt
) {
201 vp
->m_stop
= cmdp
->addr1
;
204 vp
->m_stop
= cmdp
->addr2
;
207 if (!db_exist(sp
, vp
->m_stop
.lno
)) {
208 ex_badaddr(sp
, &fake
,
209 vp
->m_stop
.lno
== 0 ? A_ZERO
: A_EOF
, NUM_OK
);
215 * Historic practice is that a trailing 'z' was ignored if it was a
216 * motion command. Should probably be an error, but not worth the
220 return (v_correct(sp
, vp
, F_ISSET(cmdp
, E_DELTA
)));
224 * Historically, if it wasn't a motion command, a delta in the search
225 * pattern turns it into a first nonblank movement.
227 nb
= F_ISSET(cmdp
, E_DELTA
);
229 /* Check for the 'z' command. */
234 /* No blanks, just like the z command. */
235 for (t
= cmd
+ 1, tlen
= len
- 1; tlen
> 0; ++t
, --tlen
)
239 (*t
== '-' || *t
== '.' || *t
== '+' || *t
== '^')) {
248 /* The z command will do the nonblank for us. */
253 v_event_push(sp
, NULL
, plus
, 1, CH_NOMAP
| CH_QUOTED
))
256 /* Push the user's command. */
257 if (v_event_push(sp
, NULL
, cmd
, len
, CH_NOMAP
| CH_QUOTED
))
260 /* Push line number so get correct z display. */
262 sizeof(buf
), "%lu", (u_long
)vp
->m_stop
.lno
);
263 CHAR2INT(sp
, buf
, tlen
, w
, wlen
);
264 if (v_event_push(sp
, NULL
, w
, wlen
, CH_NOMAP
| CH_QUOTED
))
267 /* Don't refresh until after 'z' happens. */
268 F_SET(VIP(sp
), VIP_S_REFRESH
);
271 /* Non-motion commands move to the end of the range. */
272 vp
->m_final
= vp
->m_stop
;
274 F_CLR(vp
, VM_RCM_MASK
);
275 F_SET(vp
, VM_RCM_SETFNB
);
279 err1
: msgq(sp
, M_ERR
,
280 "188|Characters after search string, line offset and/or z command");
281 err2
: vp
->m_final
.lno
= s_lno
;
282 vp
->m_final
.cno
= s_cno
;
288 * Reverse last search.
290 * PUBLIC: int v_searchN __P((SCR *, VICMD *));
299 switch (sp
->searchdir
) {
310 return (v_search(sp
, vp
, NULL
, 0, SEARCH_PARSE
, dir
));
315 * Repeat last search.
317 * PUBLIC: int v_searchn __P((SCR *, VICMD *));
324 return (v_search(sp
, vp
, NULL
, 0, SEARCH_PARSE
, sp
->searchdir
));
328 * v_searchw -- [count]^A
329 * Search for the word under the cursor.
331 * PUBLIC: int v_searchw __P((SCR *, VICMD *));
342 len
= VIP(sp
)->klen
+ RE_WSTART_LEN
+ RE_WSTOP_LEN
;
343 GET_SPACE_RETW(sp
, bp
, blen
, len
);
344 MEMCPY(bp
, RE_WSTART
, RE_WSTART_LEN
);
345 p
= bp
+ sizeof(RE_WSTART
)/sizeof(CHAR_T
) - 1;
346 MEMCPY(p
, VIP(sp
)->keyw
, VIP(sp
)->klen
);
348 MEMCPY(bp
, RE_WSTOP
, RE_WSTOP_LEN
);
350 rval
= v_search(sp
, vp
, bp
, len
, SEARCH_SET
, FORWARD
);
352 FREE_SPACEW(sp
, bp
, blen
);
357 * v_esearch -- <dialog box>
358 * Search command from the screen.
360 * PUBLIC: int v_esearch __P((SCR *, VICMD *));
373 LF_INIT(SEARCH_NOOPT
);
374 if (FL_ISSET(vp
->ev
.e_flags
, VI_SEARCH_EXT
))
375 LF_SET(SEARCH_EXTEND
);
376 if (FL_ISSET(vp
->ev
.e_flags
, VI_SEARCH_IC
))
378 if (FL_ISSET(vp
->ev
.e_flags
, VI_SEARCH_ICL
))
380 if (FL_ISSET(vp
->ev
.e_flags
, VI_SEARCH_INCR
))
382 if (FL_ISSET(vp
->ev
.e_flags
, VI_SEARCH_LIT
))
383 LF_SET(SEARCH_LITERAL
);
384 if (FL_ISSET(vp
->ev
.e_flags
, VI_SEARCH_WR
))
386 return (v_search(sp
, vp
, vp
->ev
.e_csp
, vp
->ev
.e_len
, flags
,
387 FL_ISSET(vp
->ev
.e_flags
, VI_SEARCH_REV
) ? BACKWARD
: FORWARD
));
392 * The search commands.
395 v_search(sp
, vp
, ptrn
, plen
, flags
, dir
)
403 /* Display messages. */
406 /* If it's a motion search, offset past end-of-line is okay. */
412 * Warn if the search wraps. See the comment above, in v_exaddr().
414 if (!KEYS_WAITING(sp
))
420 &vp
->m_start
, &vp
->m_stop
, ptrn
, plen
, NULL
, flags
))
425 &vp
->m_start
, &vp
->m_stop
, ptrn
, plen
, NULL
, flags
))
429 msgq(sp
, M_ERR
, "189|No previous search pattern");
435 /* Correct motion commands, otherwise, simply move to the location. */
437 if (v_correct(sp
, vp
, 0))
440 vp
->m_final
= vp
->m_stop
;
446 * Handle command with a search as the motion.
449 * Historically, commands didn't affect the line searched to/from if the
450 * motion command was a search and the final position was the start/end
451 * of the line. There were some special cases and vi was not consistent;
452 * it was fairly easy to confuse it. For example, given the two lines:
457 * placing the cursor on the 'A' and doing y?$ would so confuse it that 'h'
458 * 'k' and put would no longer work correctly. In any case, we try to do
459 * the right thing, but it's not going to exactly match historic practice.
461 * PUBLIC: int v_correct __P((SCR *, VICMD *, int));
464 v_correct(sp
, vp
, isdelta
)
475 * We may have wrapped if wrapscan was set, and we may have returned
476 * to the position where the cursor started. Historic vi didn't cope
477 * with this well. Yank wouldn't beep, but the first put after the
478 * yank would move the cursor right one column (without adding any
479 * text) and the second would put a copy of the current line. The
480 * change and delete commands would beep, but would leave the cursor
481 * on the colon command line. I believe that there are macros that
482 * depend on delete, at least, failing. For now, commands that use
483 * search as a motion component fail when the search returns to the
484 * original cursor position.
486 if (vp
->m_start
.lno
== vp
->m_stop
.lno
&&
487 vp
->m_start
.cno
== vp
->m_stop
.cno
) {
488 msgq(sp
, M_BERR
, "190|Search wrapped to original position");
494 * Searches become line mode operations if there was a delta specified
495 * to the search pattern.
501 * If the motion is in the reverse direction, switch the start and
502 * stop MARK's so that it's in a forward direction. (There's no
503 * reason for this other than to make the tests below easier. The
504 * code in vi.c:vi() would have done the switch.) Both forward
505 * and backward motions can happen for any kind of search command
506 * because of the wrapscan option.
508 if (vp
->m_start
.lno
> vp
->m_stop
.lno
||
509 vp
->m_start
.lno
== vp
->m_stop
.lno
&&
510 vp
->m_start
.cno
> vp
->m_stop
.cno
) {
512 vp
->m_start
= vp
->m_stop
;
520 * Delete and yank commands move to the end of the range.
524 * Delete and yank commands don't move. Ignore others.
526 vp
->m_final
= vp
->m_start
;
530 * Delta'd searches don't correct based on column positions.
537 * Backward searches starting at column 0, and forward searches ending
538 * at column 0 are corrected to the last column of the previous line.
539 * Otherwise, adjust the starting/ending point to the character before
540 * the current one (this is safe because we know the search had to move
543 * Searches become line mode operations if they start at the first
544 * nonblank and end at column 0 of another line.
546 if (vp
->m_start
.lno
< vp
->m_stop
.lno
&& vp
->m_stop
.cno
== 0) {
547 if (db_get(sp
, --vp
->m_stop
.lno
, DBG_FATAL
, NULL
, &len
))
549 vp
->m_stop
.cno
= len
? len
- 1 : 0;
551 if (nonblank(sp
, vp
->m_start
.lno
, &len
))
553 if (vp
->m_start
.cno
<= len
)