NetBSD/usr.bin/vi/put.c

250 lines
7.1 KiB
C

/*-
* Copyright (c) 1992, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static char sccsid[] = "@(#)put.c 8.3 (Berkeley) 3/14/94";
#endif /* not lint */
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/time.h>
#include <bitstring.h>
#include <ctype.h>
#include <limits.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include "compat.h"
#include <db.h>
#include <regex.h>
#include "vi.h"
/*
* put --
* Put text buffer contents into the file.
*
* !!!
* Historically, pasting into a file with no lines in vi would preserve
* the single blank line. This is almost certainly a result of the fact
* that 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.
*/
int
put(sp, ep, cbp, namep, cp, rp, append)
SCR *sp;
EXF *ep;
CB *cbp;
CHAR_T *namep;
MARK *cp, *rp;
int append;
{
CHAR_T name;
TEXT *ltp, *tp;
recno_t lno;
size_t blen, clen, len;
char *bp, *p, *t;
if (cbp == NULL)
if (namep == NULL) {
cbp = sp->gp->dcbp;
if (cbp == NULL) {
msgq(sp, M_ERR, "The default buffer is empty.");
return (1);
}
} else {
name = *namep;
CBNAME(sp, cbp, name);
if (cbp == NULL) {
msgq(sp, M_ERR,
"Buffer %s is empty.", charname(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.
*
* Historical practice is that the cursor ends up on the first
* non-blank character of the first line inserted.
*/
if (cp->lno == 1) {
if (file_lline(sp, ep, &lno))
return (1);
if (lno == 0) {
for (; tp != (void *)&cbp->textq;
++lno, tp = tp->q.cqe_next)
if (file_aline(sp, ep, 1, lno, tp->lb, tp->len))
return (1);
rp->lno = 1;
rp->cno = 0;
(void)nonblank(sp, ep, rp->lno, &rp->cno);
goto ret;
}
}
/* 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, tp = tp->q.cqe_next)
if (file_aline(sp, ep, 1, lno, tp->lb, tp->len))
return (1);
rp->cno = 0;
(void)nonblank(sp, ep, rp->lno, &rp->cno);
goto ret;
}
/*
* 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 ((p = file_gline(sp, ep, lno, &len)) == NULL) {
GETLINE_ERR(sp, lno);
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) {
memmove(bp, p, clen);
p += clen;
t += clen;
}
/* First line from the CB. */
memmove(t, tp->lb, tp->len);
t += tp->len;
/* Calculate length left in original line. */
clen = len ? len - cp->cno - (append ? 1 : 0) : 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) {
/*
* Historical practice is that if a non-line mode put
* is inside a single line, the cursor ends up on the
* last character inserted.
*/
rp->lno = lno;
rp->cno = (t - bp) - 1;
if (clen > 0) {
memmove(t, p, clen);
t += clen;
}
if (file_sline(sp, ep, lno, bp, t - bp))
goto mem;
} 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. */
memmove(t, ltp->lb, ltp->len);
if (clen)
memmove(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 (file_sline(sp, ep, lno, bp, t - bp))
goto mem;
/*
* Historical practice is that if a non-line mode put
* covers multiple lines, the cursor ends up on the
* first character inserted. (Of course.)
*/
rp->lno = lno;
rp->cno = (t - bp) - 1;
/* Output any intermediate lines in the CB. */
for (tp = tp->q.cqe_next;
tp->q.cqe_next != (void *)&cbp->textq;
++lno, tp = tp->q.cqe_next)
if (file_aline(sp, ep, 1, lno, tp->lb, tp->len))
goto mem;
if (file_aline(sp, ep, 1, lno, t, clen)) {
mem: FREE_SPACE(sp, bp, blen);
return (1);
}
}
FREE_SPACE(sp, bp, blen);
/* Reporting... */
ret: sp->rptlines[L_PUT] += lno - cp->lno;
return (0);
}