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: put.c,v 10.19 04/07/11 17:00:24 zy Exp $";
16 #include <sys/types.h>
17 #include <sys/queue.h>
20 #include <bitstring.h>
31 * Put text buffer contents into the file.
33 * PUBLIC: int put(SCR *, CB *, CHAR_T *, MARK *, MARK *, int);
47 size_t blen, clen, len;
57 "053|The default buffer is empty");
62 CBNAME(sp, cbp, name);
64 msgq(sp, M_ERR, "054|Buffer %s is empty",
69 tp = TAILQ_FIRST(cbp->textq);
72 * It's possible to do a put into an empty file, meaning that the cut
73 * buffer simply becomes the file. It's a special case so that we can
74 * ignore it in general.
77 * Historically, pasting into a file with no lines in vi would preserve
78 * the single blank line. This is surely a result of the fact that the
79 * historic vi couldn't deal with a file that had no lines in it. This
80 * implementation treats that as a bug, and does not retain the blank
83 * Historical practice is that the cursor ends at the first character
87 if (db_last(sp, &lno))
91 ++lno, ++sp->rptlines[L_ADDED], tp = TAILQ_NEXT(tp, q))
92 if (db_append(sp, 1, lno, tp->lb, tp->len))
100 /* If a line mode buffer, append each new line into the file. */
101 if (F_ISSET(cbp, CB_LMODE)) {
102 lno = append ? cp->lno : cp->lno - 1;
105 ++lno, ++sp->rptlines[L_ADDED], tp = TAILQ_NEXT(tp, q))
106 if (db_append(sp, 1, lno, tp->lb, tp->len))
109 (void)nonblank(sp, rp->lno, &rp->cno);
114 * If buffer was cut in character mode, replace the current line with
115 * one built from the portion of the first line to the left of the
116 * split plus the first line in the CB. Append each intermediate line
117 * in the CB. Append a line built from the portion of the first line
118 * to the right of the split plus the last line in the CB.
120 * Get the first line.
123 if (db_get(sp, lno, DBG_FATAL, &p, &len))
126 GET_SPACE_RETW(sp, bp, blen, tp->len + len + 1);
129 /* Original line, left of the split. */
130 if (len > 0 && (clen = cp->cno + (append ? 1 : 0)) > 0) {
136 /* First line from the CB. */
138 MEMCPY(t, tp->lb, tp->len);
142 /* Calculate length left in the original line. */
143 clen = len == 0 ? 0 : len - (cp->cno + (append ? 1 : 0));
147 * In the historical 4BSD version of vi, character mode puts within
148 * a single line have two cursor behaviors: if the put is from the
149 * unnamed buffer, the cursor moves to the character inserted which
150 * appears last in the file. If the put is from a named buffer,
151 * the cursor moves to the character inserted which appears first
152 * in the file. In System III/V, it was changed at some point and
153 * the cursor always moves to the first character. In both versions
154 * of vi, character mode puts that cross line boundaries leave the
155 * cursor on the first character. Nvi implements the System III/V
156 * behavior, and expect POSIX.2 to do so as well.
159 rp->cno = len == 0 ? 0 : sp->cno + (append && tp->len ? 1 : 0);
162 * If no more lines in the CB, append the rest of the original
163 * line and quit. Otherwise, build the last line before doing
164 * the intermediate lines, because the line changes will lose
167 if (TAILQ_NEXT(tp, q) == NULL) {
172 if (db_set(sp, lno, bp, t - bp))
174 if (sp->rptlchange != lno) {
175 sp->rptlchange = lno;
176 ++sp->rptlines[L_CHANGED];
180 * Have to build both the first and last lines of the
181 * put before doing any sets or we'll lose the cached
182 * line. Build both the first and last lines in the
183 * same buffer, so we don't have to have another buffer
186 * Last part of original line; check for space, reset
187 * the pointer into the buffer.
189 ltp = TAILQ_LAST(cbp->textq, _texth);
191 ADD_SPACE_RETW(sp, bp, blen, ltp->len + clen);
194 /* Add in last part of the CB. */
195 MEMCPY(t, ltp->lb, ltp->len);
197 MEMCPY(t + ltp->len, p, clen);
201 * Now: bp points to the first character of the first
202 * line, t points to the last character of the last
203 * line, t - bp is the length of the first line, and
204 * clen is the length of the last. Just figured you'd
207 * Output the line replacing the original line.
209 if (db_set(sp, lno, bp, t - bp))
211 if (sp->rptlchange != lno) {
212 sp->rptlchange = lno;
213 ++sp->rptlines[L_CHANGED];
216 /* Output any intermediate lines in the CB. */
217 for (tp = TAILQ_NEXT(tp, q); TAILQ_NEXT(tp, q) != NULL;
218 ++lno, ++sp->rptlines[L_ADDED], tp = TAILQ_NEXT(tp, q))
219 if (db_append(sp, 1, lno, tp->lb, tp->len))
222 if (db_append(sp, 1, lno, t, clen))
224 ++sp->rptlines[L_ADDED];
231 FREE_SPACEW(sp, bp, blen);