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.
12 #include <sys/types.h>
13 #include <sys/queue.h>
16 #include <bitstring.h>
27 * Put text buffer contents into the file.
29 * PUBLIC: int put(SCR *, CB *, CHAR_T *, MARK *, MARK *, int);
32 put(SCR *sp, CB *cbp, CHAR_T *namep, MARK *cp, MARK *rp, int append)
37 size_t blen, clen, len;
47 "053|The default buffer is empty");
52 CBNAME(sp, cbp, name);
54 msgq(sp, M_ERR, "054|Buffer %s is empty",
59 tp = TAILQ_FIRST(cbp->textq);
62 * It's possible to do a put into an empty file, meaning that the cut
63 * buffer simply becomes the file. It's a special case so that we can
64 * ignore it in general.
67 * Historically, pasting into a file with no lines in vi would preserve
68 * the single blank line. This is surely a result of the fact that the
69 * historic vi couldn't deal with a file that had no lines in it. This
70 * implementation treats that as a bug, and does not retain the blank
73 * Historical practice is that the cursor ends at the first character
77 if (db_last(sp, &lno))
81 ++lno, ++sp->rptlines[L_ADDED], tp = TAILQ_NEXT(tp, q))
82 if (db_append(sp, 1, lno, tp->lb, tp->len))
90 /* If a line mode buffer, append each new line into the file. */
91 if (F_ISSET(cbp, CB_LMODE)) {
92 lno = append ? cp->lno : cp->lno - 1;
95 ++lno, ++sp->rptlines[L_ADDED], tp = TAILQ_NEXT(tp, q))
96 if (db_append(sp, 1, lno, tp->lb, tp->len))
99 (void)nonblank(sp, rp->lno, &rp->cno);
104 * If buffer was cut in character mode, replace the current line with
105 * one built from the portion of the first line to the left of the
106 * split plus the first line in the CB. Append each intermediate line
107 * in the CB. Append a line built from the portion of the first line
108 * to the right of the split plus the last line in the CB.
110 * Get the first line.
113 if (db_get(sp, lno, DBG_FATAL, &p, &len))
116 GET_SPACE_RETW(sp, bp, blen, tp->len + len + 1);
119 /* Original line, left of the split. */
120 if (len > 0 && (clen = cp->cno + (append ? 1 : 0)) > 0) {
126 /* First line from the CB. */
128 MEMCPY(t, tp->lb, tp->len);
132 /* Calculate length left in the original line. */
133 clen = len == 0 ? 0 : len - (cp->cno + (append ? 1 : 0));
137 * In the historical 4BSD version of vi, character mode puts within
138 * a single line have two cursor behaviors: if the put is from the
139 * unnamed buffer, the cursor moves to the character inserted which
140 * appears last in the file. If the put is from a named buffer,
141 * the cursor moves to the character inserted which appears first
142 * in the file. In System III/V, it was changed at some point and
143 * the cursor always moves to the first character. In both versions
144 * of vi, character mode puts that cross line boundaries leave the
145 * cursor on the first character. Nvi implements the System III/V
146 * behavior, and expect POSIX.2 to do so as well.
149 rp->cno = len == 0 ? 0 : sp->cno + (append && tp->len ? 1 : 0);
152 * If no more lines in the CB, append the rest of the original
153 * line and quit. Otherwise, build the last line before doing
154 * the intermediate lines, because the line changes will lose
157 if (TAILQ_NEXT(tp, q) == NULL) {
162 if (db_set(sp, lno, bp, t - bp))
164 if (sp->rptlchange != lno) {
165 sp->rptlchange = lno;
166 ++sp->rptlines[L_CHANGED];
170 * Have to build both the first and last lines of the
171 * put before doing any sets or we'll lose the cached
172 * line. Build both the first and last lines in the
173 * same buffer, so we don't have to have another buffer
176 * Last part of original line; check for space, reset
177 * the pointer into the buffer.
179 ltp = TAILQ_LAST(cbp->textq, _texth);
181 ADD_SPACE_RETW(sp, bp, blen, ltp->len + clen);
184 /* Add in last part of the CB. */
185 MEMCPY(t, ltp->lb, ltp->len);
187 MEMCPY(t + ltp->len, p, clen);
191 * Now: bp points to the first character of the first
192 * line, t points to the last character of the last
193 * line, t - bp is the length of the first line, and
194 * clen is the length of the last. Just figured you'd
197 * Output the line replacing the original line.
199 if (db_set(sp, lno, bp, t - bp))
201 if (sp->rptlchange != lno) {
202 sp->rptlchange = lno;
203 ++sp->rptlines[L_CHANGED];
206 /* Output any intermediate lines in the CB. */
207 for (tp = TAILQ_NEXT(tp, q); TAILQ_NEXT(tp, q) != NULL;
208 ++lno, ++sp->rptlines[L_ADDED], tp = TAILQ_NEXT(tp, q))
209 if (db_append(sp, 1, lno, tp->lb, tp->len))
212 if (db_append(sp, 1, lno, t, clen))
214 ++sp->rptlines[L_ADDED];
221 FREE_SPACEW(sp, bp, blen);