NetBSD-5.0.2/dist/nvi/common/put.c
/* $NetBSD: put.c,v 1.1.1.2.6.1 2009/01/20 02:41:11 snj Exp $ */
/*-
* 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[] = "Id: put.c,v 10.18 2001/06/25 15:19:11 skimo Exp (Berkeley) Date: 2001/06/25 15:19:11";
#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(SCR *sp, CB *cbp, CHAR_T *namep, MARK *cp, MARK *rp, int append)
{
CHAR_T name;
TEXT *ltp, *tp;
db_recno_t lno;
size_t blen, clen, len;
int rval;
CHAR_T *bp, *t;
CHAR_T *p;
if (cbp == NULL) {
if (namep == NULL) {
cbp = sp->wp->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_RETW(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) {
MEMCPYW(bp, p, clen);
p += clen;
t += clen;
}
/* First line from the CB. */
if (tp->len != 0) {
MEMCPYW(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) {
MEMCPYW(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_RETW(sp, bp, blen, ltp->len + clen);
t = bp + len;
/* Add in last part of the CB. */
MEMCPYW(t, ltp->lb, ltp->len);
if (clen)
MEMCPYW(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_SPACEW(sp, bp, blen);
return (rval);
}