83f8578be4de69f27b6e1032dc665adc9be813c1
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: db.c,v 10.48 2002/06/08 19:32:52 skimo Exp $ (Berkeley) $Date: 2002/06/08 19:32:52 $";
16 #include <sys/types.h>
17 #include <sys/queue.h>
20 #include <bitstring.h>
29 static int append
__P((SCR
*, db_recno_t
, CHAR_T
*, size_t, lnop_t
, int));
33 * Front-end to db_get, special case handling for empty files.
35 * PUBLIC: int db_eget __P((SCR *, db_recno_t, CHAR_T **, size_t *, int *));
38 db_eget(SCR
*sp
, db_recno_t lno
, CHAR_T
**pp
, size_t *lenp
, int *isemptyp
)
50 /* If the line exists, simply return it. */
51 if (!db_get(sp
, lno
, 0, pp
, lenp
))
55 * If the user asked for line 0 or line 1, i.e. the only possible
56 * line in an empty file, find the last line of the file; db_last
59 if ((lno
== 0 || lno
== 1) && db_last(sp
, &l1
))
62 /* If the file isn't empty, fail loudly. */
63 if ((lno
!= 0 && lno
!= 1) || l1
!= 0) {
76 * Look in the text buffers for a line, followed by the cache, followed
79 * PUBLIC: int db_get __P((SCR *, db_recno_t, u_int32_t, CHAR_T **, size_t *));
82 db_get(SCR
*sp
, db_recno_t lno
, u_int32_t flags
, CHAR_T
**pp
, size_t *lenp
)
83 /* Line number. */ /* Pointer store. */ /* Length store. */
94 * The underlying recno stuff handles zero by returning NULL, but
95 * have to have an OOB condition for the look-aside into the input
101 /* Check for no underlying file. */
102 if ((ep
= sp
->ep
) == NULL
) {
103 ex_emsg(sp
, NULL
, EXM_NOFILEYET
);
107 if (LF_ISSET(DBG_NOCACHE
))
111 * Look-aside into the TEXT buffers and see if the line we want
114 if (F_ISSET(sp
, SC_TINPUT
)) {
115 l1
= ((TEXT
*)sp
->tiq
.cqh_first
)->lno
;
116 l2
= ((TEXT
*)sp
->tiq
.cqh_last
)->lno
;
117 if (l1
<= lno
&& l2
>= lno
) {
118 #if defined(DEBUG) && 0
120 "retrieve TEXT buffer line %lu\n", (u_long
)lno
);
122 for (tp
= sp
->tiq
.cqh_first
;
123 tp
->lno
!= lno
; tp
= tp
->q
.cqe_next
);
131 * Adjust the line number for the number of lines used
132 * by the text input buffers.
138 /* Look-aside into the cache, and see if the line we want is there. */
139 if (lno
== sp
->c_lno
) {
140 #if defined(DEBUG) && 0
141 vtrace(sp
, "retrieve cached line %lu\n", (u_long
)lno
);
154 /* data.size contains length in bytes */
155 BINC_GOTO(sp
, CHAR_T
, sp
->c_lp
, sp
->c_blen
, nlen
);
157 /* Get the line from the underlying database. */
158 memset(&key
, 0, sizeof(key
));
160 key
.size
= sizeof(lno
);
161 memset(&data
, 0, sizeof(data
));
162 data
.data
= sp
->c_lp
;
163 data
.ulen
= sp
->c_blen
;
164 data
.flags
= DB_DBT_USERMEM
;
165 switch (ep
->db
->get(ep
->db
, NULL
, &key
, &data
, 0)) {
166 case DB_BUFFER_SMALL
:
172 err1
: if (LF_ISSET(DBG_FATAL
))
173 err2
: db_err(sp
, lno
);
175 err3
: if (lenp
!= NULL
)
184 if (FILE2INT(sp
, data
.data
, data
.size
, wp
, wlen
)) {
185 if (!F_ISSET(sp
, SC_CONV_ERROR
)) {
186 F_SET(sp
, SC_CONV_ERROR
);
187 msgq(sp
, M_ERR
, "324|Conversion error on line %d", lno
);
192 /* Reset the cache. */
193 if (wp
!= data
.data
) {
194 BINC_GOTOW(sp
, sp
->c_lp
, sp
->c_blen
, wlen
);
195 MEMCPYW(sp
->c_lp
, wp
, wlen
);
200 #if defined(DEBUG) && 0
201 vtrace(sp
, "retrieve DB line %lu\n", (u_long
)lno
);
212 * Delete a line from the file.
214 * PUBLIC: int db_delete __P((SCR *, db_recno_t));
217 db_delete(SCR
*sp
, db_recno_t lno
)
222 #if defined(DEBUG) && 0
223 vtrace(sp
, "delete line %lu\n", (u_long
)lno
);
225 /* Check for no underlying file. */
226 if ((ep
= sp
->ep
) == NULL
) {
227 ex_emsg(sp
, NULL
, EXM_NOFILEYET
);
230 if (ep
->l_win
&& ep
->l_win
!= sp
->wp
) {
231 ex_emsg(sp
, NULL
, EXM_LOCKED
);
235 /* Update marks, @ and global commands. */
236 if (line_insdel(sp
, LINE_DELETE
, lno
))
239 /* Log before change. */
240 log_line(sp
, lno
, LOG_LINE_DELETE_B
);
243 memset(&key
, 0, sizeof(key
));
245 key
.size
= sizeof(lno
);
246 if ((sp
->db_error
= ep
->db
->del(ep
->db
, NULL
, &key
, 0)) != 0) {
247 msgq(sp
, M_DBERR
, "003|unable to delete line %lu",
252 /* Flush the cache, update line count, before screen update. */
253 update_cache(sp
, LINE_DELETE
, lno
);
255 /* File now modified. */
256 if (F_ISSET(ep
, F_FIRSTMODIFY
))
258 F_SET(ep
, F_MODIFIED
);
260 /* Log after change. */
261 log_line(sp
, lno
, LOG_LINE_DELETE_F
);
264 return (scr_update(sp
, lno
, LINE_DELETE
, 1));
267 /* maybe this could be simpler
269 * DB3 behaves differently from DB1
271 * if lno != 0 just go to lno and put the new line after it
272 * if lno == 0 then if there are any record, put in front of the first
273 * otherwise just append to the end thus creating the first
277 append(SCR
*sp
, db_recno_t lno
, CHAR_T
*p
, size_t len
, lnop_t op
, int update
)
286 /* Check for no underlying file. */
287 if ((ep
= sp
->ep
) == NULL
) {
288 ex_emsg(sp
, NULL
, EXM_NOFILEYET
);
291 if (ep
->l_win
&& ep
->l_win
!= sp
->wp
) {
292 ex_emsg(sp
, NULL
, EXM_LOCKED
);
296 /* Log before change. */
297 log_line(sp
, lno
+ 1, LOG_LINE_APPEND_B
);
300 memset(&key
, 0, sizeof(key
));
302 key
.size
= sizeof(lno
);
303 memset(&data
, 0, sizeof(data
));
305 if ((sp
->db_error
= ep
->db
->cursor(ep
->db
, NULL
, &dbcp_put
, 0)) != 0)
308 INT2FILE(sp
, p
, len
, fp
, flen
);
311 if ((sp
->db_error
= dbcp_put
->c_get(dbcp_put
, &key
, &data
, DB_SET
)) != 0)
316 if ((sp
->db_error
= dbcp_put
->c_put(dbcp_put
, &key
, &data
, DB_AFTER
)) != 0) {
318 (void)dbcp_put
->c_close(dbcp_put
);
321 ? "004|unable to append to line %lu"
322 : "005|unable to insert at line %lu",
327 if ((sp
->db_error
= dbcp_put
->c_get(dbcp_put
, &key
, &data
, DB_FIRST
)) != 0) {
328 if (sp
->db_error
!= DB_NOTFOUND
)
333 if ((sp
->db_error
= ep
->db
->put(ep
->db
, NULL
, &key
, &data
, DB_APPEND
)) != 0) {
338 key
.size
= sizeof(lno
);
341 if ((sp
->db_error
= dbcp_put
->c_put(dbcp_put
, &key
, &data
, DB_BEFORE
)) != 0) {
347 (void)dbcp_put
->c_close(dbcp_put
);
349 /* Flush the cache, update line count, before screen update. */
350 update_cache(sp
, LINE_INSERT
, lno
);
352 /* File now dirty. */
353 if (F_ISSET(ep
, F_FIRSTMODIFY
))
355 F_SET(ep
, F_MODIFIED
);
357 /* Log after change. */
358 log_line(sp
, lno
+ 1, LOG_LINE_APPEND_F
);
360 /* Update marks, @ and global commands. */
361 rval
= line_insdel(sp
, LINE_INSERT
, lno
+ 1);
366 * comment copied from db_append
368 * Nasty hack. If multiple lines are input by the user, they aren't
369 * committed until an <ESC> is entered. The problem is the screen was
370 * updated/scrolled as each line was entered. So, when this routine
371 * is called to copy the new lines from the cut buffer into the file,
372 * it has to know not to update the screen again.
374 return (scr_update(sp
, lno
+ 1, LINE_INSERT
, update
) || rval
);
379 * Append a line into the file.
381 * PUBLIC: int db_append __P((SCR *, int, db_recno_t, CHAR_T *, size_t));
384 db_append(SCR
*sp
, int update
, db_recno_t lno
, CHAR_T
*p
, size_t len
)
386 #if defined(DEBUG) && 0
387 vtrace(sp
, "append to %lu: len %u {%.*s}\n", lno
, len
, MIN(len
, 20), p
);
391 return append(sp
, lno
, p
, len
, LINE_APPEND
, update
);
396 * Insert a line into the file.
398 * PUBLIC: int db_insert __P((SCR *, db_recno_t, CHAR_T *, size_t));
401 db_insert(SCR
*sp
, db_recno_t lno
, CHAR_T
*p
, size_t len
)
403 #if defined(DEBUG) && 0
404 vtrace(sp
, "insert before %lu: len %lu {%.*s}\n",
405 (u_long
)lno
, (u_long
)len
, MIN(len
, 20), p
);
407 return append(sp
, lno
- 1, p
, len
, LINE_INSERT
, 1);
412 * Store a line in the file.
414 * PUBLIC: int db_set __P((SCR *, db_recno_t, CHAR_T *, size_t));
417 db_set(SCR
*sp
, db_recno_t lno
, CHAR_T
*p
, size_t len
)
424 #if defined(DEBUG) && 0
425 vtrace(sp
, "replace line %lu: len %lu {%.*s}\n",
426 (u_long
)lno
, (u_long
)len
, MIN(len
, 20), p
);
428 /* Check for no underlying file. */
429 if ((ep
= sp
->ep
) == NULL
) {
430 ex_emsg(sp
, NULL
, EXM_NOFILEYET
);
433 if (ep
->l_win
&& ep
->l_win
!= sp
->wp
) {
434 ex_emsg(sp
, NULL
, EXM_LOCKED
);
438 /* Log before change. */
439 log_line(sp
, lno
, LOG_LINE_RESET_B
);
441 INT2FILE(sp
, p
, len
, fp
, flen
);
444 memset(&key
, 0, sizeof(key
));
446 key
.size
= sizeof(lno
);
447 memset(&data
, 0, sizeof(data
));
450 if ((sp
->db_error
= ep
->db
->put(ep
->db
, NULL
, &key
, &data
, 0)) != 0) {
451 msgq(sp
, M_DBERR
, "006|unable to store line %lu", (u_long
)lno
);
455 /* Flush the cache, update line count, before screen update. */
456 update_cache(sp
, LINE_RESET
, lno
);
458 /* File now dirty. */
459 if (F_ISSET(ep
, F_FIRSTMODIFY
))
461 F_SET(ep
, F_MODIFIED
);
463 /* Log after change. */
464 log_line(sp
, lno
, LOG_LINE_RESET_F
);
467 return (scr_update(sp
, lno
, LINE_RESET
, 1));
472 * Return if a line exists.
474 * PUBLIC: int db_exist __P((SCR *, db_recno_t));
477 db_exist(SCR
*sp
, db_recno_t lno
)
481 /* Check for no underlying file. */
482 if ((ep
= sp
->ep
) == NULL
) {
483 ex_emsg(sp
, NULL
, EXM_NOFILEYET
);
491 * Check the last-line number cache. Adjust the cached line
492 * number for the lines used by the text input buffers.
494 if (ep
->c_nlines
!= OOBLNO
)
495 return (lno
<= (F_ISSET(sp
, SC_TINPUT
) ?
496 ep
->c_nlines
+ (((TEXT
*)sp
->tiq
.cqh_last
)->lno
-
497 ((TEXT
*)sp
->tiq
.cqh_first
)->lno
) : ep
->c_nlines
));
499 /* Go get the line. */
500 return (!db_get(sp
, lno
, 0, NULL
, NULL
));
505 * Return the number of lines in the file.
507 * PUBLIC: int db_last __P((SCR *, db_recno_t *));
510 db_last(SCR
*sp
, db_recno_t
*lnop
)
519 /* Check for no underlying file. */
520 if ((ep
= sp
->ep
) == NULL
) {
521 ex_emsg(sp
, NULL
, EXM_NOFILEYET
);
526 * Check the last-line number cache. Adjust the cached line
527 * number for the lines used by the text input buffers.
529 if (ep
->c_nlines
!= OOBLNO
) {
530 *lnop
= ep
->c_nlines
;
531 if (F_ISSET(sp
, SC_TINPUT
))
532 *lnop
+= ((TEXT
*)sp
->tiq
.cqh_last
)->lno
-
533 ((TEXT
*)sp
->tiq
.cqh_first
)->lno
;
537 memset(&key
, 0, sizeof(key
));
539 key
.size
= sizeof(lno
);
540 memset(&data
, 0, sizeof(data
));
542 if ((sp
->db_error
= ep
->db
->cursor(ep
->db
, NULL
, &dbcp
, 0)) != 0)
544 switch (sp
->db_error
= dbcp
->c_get(dbcp
, &key
, &data
, DB_LAST
)) {
549 (void)dbcp
->c_close(dbcp
);
552 msgq(sp
, M_DBERR
, "007|unable to get last line");
559 memcpy(&lno
, key
.data
, sizeof(lno
));
561 if (lno
!= sp
->c_lno
) {
562 FILE2INT(sp
, data
.data
, data
.size
, wp
, wlen
);
564 /* Fill the cache. */
565 BINC_GOTOW(sp
, sp
->c_lp
, sp
->c_blen
, wlen
);
566 MEMCPYW(sp
->c_lp
, wp
, wlen
);
572 (void)dbcp
->c_close(dbcp
);
574 /* Return the value. */
575 *lnop
= (F_ISSET(sp
, SC_TINPUT
) &&
576 ((TEXT
*)sp
->tiq
.cqh_last
)->lno
> lno
?
577 ((TEXT
*)sp
->tiq
.cqh_last
)->lno
: lno
);
583 * Report a line error.
585 * PUBLIC: void db_err __P((SCR *, db_recno_t));
588 db_err(SCR
*sp
, db_recno_t lno
)
591 "008|Error: unable to retrieve line %lu", (u_long
)lno
);
596 * Update all of the screens that are backed by the file that
599 * PUBLIC: int scr_update __P((SCR *sp, db_recno_t lno,
600 * PUBLIC: lnop_t op, int current));
603 scr_update(SCR
*sp
, db_recno_t lno
, lnop_t op
, int current
)
609 if (F_ISSET(sp
, SC_EX
))
612 /* XXXX goes outside of window */
615 for (wp
= sp
->gp
->dq
.cqh_first
; wp
!= (void *)&sp
->gp
->dq
;
617 for (tsp
= wp
->scrq
.cqh_first
;
618 tsp
!= (void *)&wp
->scrq
; tsp
= tsp
->q
.cqe_next
)
619 if (sp
!= tsp
&& tsp
->ep
== ep
)
620 if (vs_change(tsp
, lno
, op
))
622 return (current
? vs_change(sp
, lno
, op
) : 0);
626 * PUBLIC: void update_cache __P((SCR *sp, lnop_t op, db_recno_t lno));
629 update_cache(SCR
*sp
, lnop_t op
, db_recno_t lno
)
636 /* Flush the cache, update line count, before screen update. */
637 /* The flushing is probably not needed, since it was incorrect
638 * for db_insert. It might be better to adjust it, like
639 * marks, @ and global
641 for (scrp
= ep
->scrq
.cqh_first
; scrp
!= (void *)&ep
->scrq
;
642 scrp
= scrp
->eq
.cqe_next
)
646 if (lno
<= scrp
->c_lno
)
647 scrp
->c_lno
= OOBLNO
;
650 if (lno
== scrp
->c_lno
)
651 scrp
->c_lno
= OOBLNO
;
655 if (ep
->c_nlines
!= OOBLNO
)
667 * PUBLIC: int line_insdel __P((SCR *sp, lnop_t op, db_recno_t lno));
670 line_insdel(SCR
*sp
, lnop_t op
, db_recno_t lno
)
674 /* Update marks, @ and global commands. */
676 if (mark_insdel(sp
, op
, lno
))
678 if (ex_g_insdel(sp
, op
, lno
))