1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
/*-
* Copyright (c) 1992, 1993, 1994
* The Regents of the University of California. All rights reserved.
* Copyright (c) 1992, 1993, 1994, 1995, 1996
* Keith Bostic. All rights reserved.
*
* See the LICENSE file for redistribution information.
*/
#include "config.h"
#ifndef lint
static const char sccsid[] = "@(#)put.c 10.11 (Berkeley) 9/23/96";
#endif /* not lint */
#include <sys/types.h>
#include <sys/queue.h>
#include <bitstring.h>
#include <ctype.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "common.h"
/*
* put --
* Put text buffer contents into the file.
*
* PUBLIC: int put __P((SCR *, CB *, CHAR_T *, MARK *, MARK *, int));
*/
int
put(sp, cbp, namep, cp, rp, append)
SCR *sp;
CB *cbp;
CHAR_T *namep;
MARK *cp, *rp;
int append;
{
CHAR_T name;
TEXT *ltp, *tp;
recno_t lno;
size_t blen, clen, len;
int rval;
char *bp, *p, *t;
if (cbp == NULL)
if (namep == NULL) {
cbp = sp->gp->dcbp;
if (cbp == NULL) {
msgq(sp, M_ERR,
"053|The default buffer is empty");
return (1);
}
} else {
name = *namep;
CBNAME(sp, cbp, name);
if (cbp == NULL) {
msgq(sp, M_ERR, "054|Buffer %s is empty",
KEY_NAME(sp, name));
return (1);
}
}
tp = cbp->textq.cqh_first;
/*
* It's possible to do a put into an empty file, meaning that the cut
* buffer simply becomes the file. It's a special case so that we can
* ignore it in general.
*
* !!!
* Historically, pasting into a file with no lines in vi would preserve
* the single blank line. This is surely a result of the fact that the
* historic vi couldn't deal with a file that had no lines in it. This
* implementation treats that as a bug, and does not retain the blank
* line.
*
* Historical practice is that the cursor ends at the first character
* in the file.
*/
if (cp->lno == 1) {
if (db_last(sp, &lno))
return (1);
if (lno == 0) {
for (; tp != (void *)&cbp->textq;
++lno, ++sp->rptlines[L_ADDED], tp = tp->q.cqe_next)
if (db_append(sp, 1, lno, tp->lb, tp->len))
return (1);
rp->lno = 1;
rp->cno = 0;
return (0);
}
}
/* If a line mode buffer, append each new line into the file. */
if (F_ISSET(cbp, CB_LMODE)) {
lno = append ? cp->lno : cp->lno - 1;
rp->lno = lno + 1;
for (; tp != (void *)&cbp->textq;
++lno, ++sp->rptlines[L_ADDED], tp = tp->q.cqe_next)
if (db_append(sp, 1, lno, tp->lb, tp->len))
return (1);
rp->cno = 0;
(void)nonblank(sp, rp->lno, &rp->cno);
return (0);
}
/*
* If buffer was cut in character mode, replace the current line with
* one built from the portion of the first line to the left of the
* split plus the first line in the CB. Append each intermediate line
* in the CB. Append a line built from the portion of the first line
* to the right of the split plus the last line in the CB.
*
* Get the first line.
*/
lno = cp->lno;
if (db_get(sp, lno, DBG_FATAL, &p, &len))
return (1);
GET_SPACE_RET(sp, bp, blen, tp->len + len + 1);
t = bp;
/* Original line, left of the split. */
if (len > 0 && (clen = cp->cno + (append ? 1 : 0)) > 0) {
memcpy(bp, p, clen);
p += clen;
t += clen;
}
/* First line from the CB. */
if (tp->len != 0) {
memcpy(t, tp->lb, tp->len);
t += tp->len;
}
/* Calculate length left in the original line. */
clen = len == 0 ? 0 : len - (cp->cno + (append ? 1 : 0));
/*
* !!!
* In the historical 4BSD version of vi, character mode puts within
* a single line have two cursor behaviors: if the put is from the
* unnamed buffer, the cursor moves to the character inserted which
* appears last in the file. If the put is from a named buffer,
* the cursor moves to the character inserted which appears first
* in the file. In System III/V, it was changed at some point and
* the cursor always moves to the first character. In both versions
* of vi, character mode puts that cross line boundaries leave the
* cursor on the first character. Nvi implements the System III/V
* behavior, and expect POSIX.2 to do so as well.
*/
rp->lno = lno;
rp->cno = len == 0 ? 0 : sp->cno + (append && tp->len ? 1 : 0);
/*
* If no more lines in the CB, append the rest of the original
* line and quit. Otherwise, build the last line before doing
* the intermediate lines, because the line changes will lose
* the cached line.
*/
if (tp->q.cqe_next == (void *)&cbp->textq) {
if (clen > 0) {
memcpy(t, p, clen);
t += clen;
}
if (db_set(sp, lno, bp, t - bp))
goto err;
if (sp->rptlchange != lno) {
sp->rptlchange = lno;
++sp->rptlines[L_CHANGED];
}
} else {
/*
* Have to build both the first and last lines of the
* put before doing any sets or we'll lose the cached
* line. Build both the first and last lines in the
* same buffer, so we don't have to have another buffer
* floating around.
*
* Last part of original line; check for space, reset
* the pointer into the buffer.
*/
ltp = cbp->textq.cqh_last;
len = t - bp;
ADD_SPACE_RET(sp, bp, blen, ltp->len + clen);
t = bp + len;
/* Add in last part of the CB. */
memcpy(t, ltp->lb, ltp->len);
if (clen)
memcpy(t + ltp->len, p, clen);
clen += ltp->len;
/*
* Now: bp points to the first character of the first
* line, t points to the last character of the last
* line, t - bp is the length of the first line, and
* clen is the length of the last. Just figured you'd
* want to know.
*
* Output the line replacing the original line.
*/
if (db_set(sp, lno, bp, t - bp))
goto err;
if (sp->rptlchange != lno) {
sp->rptlchange = lno;
++sp->rptlines[L_CHANGED];
}
/* Output any intermediate lines in the CB. */
for (tp = tp->q.cqe_next;
tp->q.cqe_next != (void *)&cbp->textq;
++lno, ++sp->rptlines[L_ADDED], tp = tp->q.cqe_next)
if (db_append(sp, 1, lno, tp->lb, tp->len))
goto err;
if (db_append(sp, 1, lno, t, clen))
goto err;
++sp->rptlines[L_ADDED];
}
rval = 0;
if (0)
err: rval = 1;
FREE_SPACE(sp, bp, blen);
return (rval);
}
|
