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: line.c,v 10.27 2015/04/03 14:17:21 zy Exp $";
16 #include <sys/types.h>
17 #include <sys/queue.h>
20 #include <bitstring.h>
29 static int scr_update(SCR *, recno_t, lnop_t, int);
33 * Front-end to db_get, special case handling for empty files.
35 * PUBLIC: int db_eget(SCR *, recno_t, CHAR_T **, size_t *, int *);
40 recno_t lno, /* Line number. */
41 CHAR_T **pp, /* Pointer store. */
42 size_t *lenp, /* Length store. */
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(SCR *, recno_t, u_int32_t, CHAR_T **, size_t *);
84 recno_t lno, /* Line number. */
86 CHAR_T **pp, /* Pointer store. */
87 size_t *lenp) /* Length store. */
97 * The underlying recno stuff handles zero by returning NULL, but
98 * have to have an OOB condition for the look-aside into the input
104 /* Check for no underlying file. */
105 if ((ep = sp->ep) == NULL) {
106 ex_emsg(sp, NULL, EXM_NOFILEYET);
110 if (LF_ISSET(DBG_NOCACHE))
114 * Look-aside into the TEXT buffers and see if the line we want
117 if (F_ISSET(sp, SC_TINPUT)) {
118 l1 = ((TEXT *)TAILQ_FIRST(sp->tiq))->lno;
119 l2 = ((TEXT *)TAILQ_LAST(sp->tiq, _texth))->lno;
120 if (l1 <= lno && l2 >= lno) {
121 #if defined(DEBUG) && 0
122 TRACE(sp, "retrieve TEXT buffer line %lu\n", (u_long)lno);
124 for (tp = TAILQ_FIRST(sp->tiq);
125 tp->lno != lno; tp = TAILQ_NEXT(tp, q));
133 * Adjust the line number for the number of lines used
134 * by the text input buffers.
140 /* Look-aside into the cache, and see if the line we want is there. */
141 if (lno == ep->c_lno) {
142 #if defined(DEBUG) && 0
143 TRACE(sp, "retrieve cached line %lu\n", (u_long)lno);
154 /* Get the line from the underlying database. */
156 key.size = sizeof(lno);
157 switch (ep->db->get(ep->db, &key, &data, 0)) {
161 err1: if (LF_ISSET(DBG_FATAL))
162 err2: db_err(sp, lno);
164 err3: if (lenp != NULL)
171 if (FILE2INT(sp, data.data, data.size, wp, wlen)) {
172 if (!F_ISSET(sp, SC_CONV_ERROR)) {
173 F_SET(sp, SC_CONV_ERROR);
174 msgq(sp, M_ERR, "324|Conversion error on line %d", lno);
179 /* Reset the cache. */
180 if (wp != data.data) {
181 BINC_GOTOW(sp, ep->c_lp, ep->c_blen, wlen);
182 MEMCPY(ep->c_lp, wp, wlen);
184 ep->c_lp = data.data;
188 #if defined(DEBUG) && 0
189 TRACE(sp, "retrieve DB line %lu\n", (u_long)lno);
200 * Delete a line from the file.
202 * PUBLIC: int db_delete(SCR *, recno_t);
212 #if defined(DEBUG) && 0
213 TRACE(sp, "delete line %lu\n", (u_long)lno);
215 /* Check for no underlying file. */
216 if ((ep = sp->ep) == NULL) {
217 ex_emsg(sp, NULL, EXM_NOFILEYET);
221 /* Update marks, @ and global commands. */
222 if (mark_insdel(sp, LINE_DELETE, lno))
224 if (ex_g_insdel(sp, LINE_DELETE, lno))
228 log_line(sp, lno, LOG_LINE_DELETE);
232 key.size = sizeof(lno);
233 if (ep->db->del(ep->db, &key, 0) == 1) {
235 "003|unable to delete line %lu", (u_long)lno);
239 /* Flush the cache, update line count, before screen update. */
240 if (lno <= ep->c_lno)
242 if (ep->c_nlines != OOBLNO)
245 /* File now modified. */
246 if (F_ISSET(ep, F_FIRSTMODIFY))
248 F_SET(ep, F_MODIFIED);
251 return (scr_update(sp, lno, LINE_DELETE, 1));
256 * Append a line into the file.
258 * PUBLIC: int db_append(SCR *, int, recno_t, CHAR_T *, size_t);
274 #if defined(DEBUG) && 0
275 TRACE(sp, "append to %lu: len %u {%.*s}\n", lno, len, MIN(len, 20), p);
277 /* Check for no underlying file. */
278 if ((ep = sp->ep) == NULL) {
279 ex_emsg(sp, NULL, EXM_NOFILEYET);
283 INT2FILE(sp, p, len, fp, flen);
287 key.size = sizeof(lno);
290 if (ep->db->put(ep->db, &key, &data, R_IAFTER) == -1) {
292 "004|unable to append to line %lu", (u_long)lno);
296 /* Flush the cache, update line count, before screen update. */
299 if (ep->c_nlines != OOBLNO)
302 /* File now dirty. */
303 if (F_ISSET(ep, F_FIRSTMODIFY))
305 F_SET(ep, F_MODIFIED);
308 log_line(sp, lno + 1, LOG_LINE_APPEND);
310 /* Update marks, @ and global commands. */
312 if (mark_insdel(sp, LINE_INSERT, lno + 1))
314 if (ex_g_insdel(sp, LINE_INSERT, lno + 1))
321 * Nasty hack. If multiple lines are input by the user, they aren't
322 * committed until an <ESC> is entered. The problem is the screen was
323 * updated/scrolled as each line was entered. So, when this routine
324 * is called to copy the new lines from the cut buffer into the file,
325 * it has to know not to update the screen again.
327 return (scr_update(sp, lno, LINE_APPEND, update) || rval);
332 * Insert a line into the file.
334 * PUBLIC: int db_insert(SCR *, recno_t, CHAR_T *, size_t);
349 #if defined(DEBUG) && 0
350 TRACE(sp, "insert before %lu: len %lu {%.*s}\n",
351 (u_long)lno, (u_long)len, MIN(len, 20), p);
353 /* Check for no underlying file. */
354 if ((ep = sp->ep) == NULL) {
355 ex_emsg(sp, NULL, EXM_NOFILEYET);
359 INT2FILE(sp, p, len, fp, flen);
363 key.size = sizeof(lno);
366 if (ep->db->put(ep->db, &key, &data, R_IBEFORE) == -1) {
368 "005|unable to insert at line %lu", (u_long)lno);
372 /* Flush the cache, update line count, before screen update. */
373 if (lno >= ep->c_lno)
375 if (ep->c_nlines != OOBLNO)
378 /* File now dirty. */
379 if (F_ISSET(ep, F_FIRSTMODIFY))
381 F_SET(ep, F_MODIFIED);
384 log_line(sp, lno, LOG_LINE_INSERT);
386 /* Update marks, @ and global commands. */
388 if (mark_insdel(sp, LINE_INSERT, lno))
390 if (ex_g_insdel(sp, LINE_INSERT, lno))
394 return (scr_update(sp, lno, LINE_INSERT, 1) || rval);
399 * Store a line in the file.
401 * PUBLIC: int db_set(SCR *, recno_t, CHAR_T *, size_t);
415 #if defined(DEBUG) && 0
416 TRACE(sp, "replace line %lu: len %lu {%.*s}\n",
417 (u_long)lno, (u_long)len, MIN(len, 20), p);
419 /* Check for no underlying file. */
420 if ((ep = sp->ep) == NULL) {
421 ex_emsg(sp, NULL, EXM_NOFILEYET);
425 /* Log before change. */
426 log_line(sp, lno, LOG_LINE_RESET_B);
428 INT2FILE(sp, p, len, fp, flen);
432 key.size = sizeof(lno);
435 if (ep->db->put(ep->db, &key, &data, 0) == -1) {
437 "006|unable to store line %lu", (u_long)lno);
441 /* Flush the cache, before logging or screen update. */
442 if (lno == ep->c_lno)
445 /* File now dirty. */
446 if (F_ISSET(ep, F_FIRSTMODIFY))
448 F_SET(ep, F_MODIFIED);
450 /* Log after change. */
451 log_line(sp, lno, LOG_LINE_RESET_F);
454 return (scr_update(sp, lno, LINE_RESET, 1));
459 * Return if a line exists.
461 * PUBLIC: int db_exist(SCR *, recno_t);
470 /* Check for no underlying file. */
471 if ((ep = sp->ep) == NULL) {
472 ex_emsg(sp, NULL, EXM_NOFILEYET);
480 * Check the last-line number cache. Adjust the cached line
481 * number for the lines used by the text input buffers.
483 if (ep->c_nlines != OOBLNO)
484 return (lno <= (F_ISSET(sp, SC_TINPUT) ?
485 ep->c_nlines + (((TEXT *)TAILQ_LAST(sp->tiq, _texth))->lno -
486 ((TEXT *)TAILQ_FIRST(sp->tiq))->lno) : ep->c_nlines));
488 /* Go get the line. */
489 return (!db_get(sp, lno, 0, NULL, NULL));
494 * Return the number of lines in the file.
496 * PUBLIC: int db_last(SCR *, recno_t *);
509 /* Check for no underlying file. */
510 if ((ep = sp->ep) == NULL) {
511 ex_emsg(sp, NULL, EXM_NOFILEYET);
516 * Check the last-line number cache. Adjust the cached line
517 * number for the lines used by the text input buffers.
519 if (ep->c_nlines != OOBLNO) {
520 *lnop = ep->c_nlines;
521 if (F_ISSET(sp, SC_TINPUT))
522 *lnop += ((TEXT *)TAILQ_LAST(sp->tiq, _texth))->lno -
523 ((TEXT *)TAILQ_FIRST(sp->tiq))->lno;
528 key.size = sizeof(lno);
530 switch (ep->db->seq(ep->db, &key, &data, R_LAST)) {
533 msgq(sp, M_SYSERR, "007|unable to get last line");
541 memcpy(&lno, key.data, sizeof(lno));
543 if (lno != ep->c_lno) {
544 FILE2INT(sp, data.data, data.size, wp, wlen);
546 /* Fill the cache. */
547 if (wp != data.data) {
548 BINC_GOTOW(sp, ep->c_lp, ep->c_blen, wlen);
549 MEMCPY(ep->c_lp, wp, wlen);
551 ep->c_lp = data.data;
557 /* Return the value. */
558 *lnop = (F_ISSET(sp, SC_TINPUT) &&
559 ((TEXT *)TAILQ_LAST(sp->tiq, _texth))->lno > lno ?
560 ((TEXT *)TAILQ_LAST(sp->tiq, _texth))->lno : lno);
566 * Retrieve a raw line from the database.
568 * PUBLIC: int db_rget(SCR *, recno_t, char **, size_t *);
573 recno_t lno, /* Line number. */
574 char **pp, /* Pointer store. */
575 size_t *lenp) /* Length store. */
581 /* Get the line from the underlying database. */
583 key.size = sizeof(lno);
584 if ((rval = ep->db->get(ep->db, &key, &data, 0)) == 0)
595 * Store a raw line into the database.
597 * PUBLIC: int db_rset(SCR *, recno_t, char *, size_t);
611 key.size = sizeof(lno);
614 return ep->db->put(ep->db, &key, &data, 0);
619 * Report a line error.
621 * PUBLIC: void db_err(SCR *, recno_t);
629 "008|Error: unable to retrieve line %lu", (u_long)lno);
634 * Update all of the screens that are backed by the file that
647 if (F_ISSET(sp, SC_EX))
652 TAILQ_FOREACH(tsp, sp->gp->dq, q)
653 if (sp != tsp && tsp->ep == ep)
654 if (vs_change(tsp, lno, op))
656 return (current ? vs_change(sp, lno, op) : 0);