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/*-
* 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[] = "@(#)delete.c 8.9 (Berkeley) 3/8/94";
#endif /* not lint */
#include <sys/types.h>
#include <queue.h>
#include <sys/time.h>
#include <bitstring.h>
#include <errno.h>
#include <limits.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <db.h>
#include <regex.h>
#include "vi.h"
/*
* delete --
* Delete a range of text.
*/
int
delete(sp, ep, fm, tm, lmode)
SCR *sp;
EXF *ep;
MARK *fm, *tm;
int lmode;
{
recno_t lno;
size_t blen, len, tlen;
char *bp, *p;
int eof;
bp = NULL;
/* Case 1 -- delete in line mode. */
if (lmode) {
for (lno = tm->lno; lno >= fm->lno; --lno)
if (file_dline(sp, ep, lno))
return (1);
goto vdone;
}
/*
* Case 2 -- delete to EOF. This is a special case because it's
* easier to pick it off than try and find it in the other cases.
*/
if (file_lline(sp, ep, &lno))
return (1);
if (tm->lno >= lno) {
if (tm->lno == lno) {
if ((p = file_gline(sp, ep, lno, &len)) == NULL) {
GETLINE_ERR(sp, lno);
return (1);
}
eof = tm->cno >= len ? 1 : 0;
} else
eof = 1;
if (eof) {
for (lno = tm->lno; lno > fm->lno; --lno) {
if (file_dline(sp, ep, lno))
return (1);
++sp->rptlines[L_DELETED];
}
if ((p = file_gline(sp, ep, fm->lno, &len)) == NULL) {
GETLINE_ERR(sp, fm->lno);
return (1);
}
GET_SPACE_RET(sp, bp, blen, fm->cno);
memmove(bp, p, fm->cno);
if (file_sline(sp, ep, fm->lno, bp, fm->cno))
return (1);
goto done;
}
}
/* Case 3 -- delete within a single line. */
if (tm->lno == fm->lno) {
if ((p = file_gline(sp, ep, fm->lno, &len)) == NULL) {
GETLINE_ERR(sp, fm->lno);
return (1);
}
GET_SPACE_RET(sp, bp, blen, len);
if (fm->cno != 0)
memmove(bp, p, fm->cno);
memmove(bp + fm->cno, p + (tm->cno + 1), len - (tm->cno + 1));
if (file_sline(sp, ep, fm->lno,
bp, len - ((tm->cno - fm->cno) + 1)))
goto err;
goto done;
}
/*
* Case 4 -- delete over multiple lines.
*
* Figure out how big a buffer we need.
*/
if ((p = file_gline(sp, ep, fm->lno, &len)) == NULL) {
GETLINE_ERR(sp, fm->lno);
return (1);
}
tlen = len;
if ((p = file_gline(sp, ep, tm->lno, &len)) == NULL) {
GETLINE_ERR(sp, tm->lno);
return (1);
}
/*
* XXX
* We can overflow memory here, if (len + tlen) > SIZE_T_MAX. The
* only portable way I've found to test is to depend on the overflow
* being less than the value.
*/
tlen += len;
if (len > tlen) {
msgq(sp, M_ERR, "Error: line length overflow");
return (1);
}
GET_SPACE_RET(sp, bp, blen, tlen);
/* Copy the start partial line into place. */
if ((p = file_gline(sp, ep, fm->lno, &len)) == NULL) {
GETLINE_ERR(sp, fm->lno);
goto err;
}
memmove(bp, p, fm->cno);
tlen = fm->cno;
/* Copy the end partial line into place. */
if ((p = file_gline(sp, ep, tm->lno, &len)) == NULL) {
GETLINE_ERR(sp, tm->lno);
goto err;
}
memmove(bp + tlen, p + (tm->cno + 1), len - (tm->cno + 1));
tlen += len - (tm->cno + 1);
/* Set the current line. */
if (file_sline(sp, ep, fm->lno, bp, tlen))
goto err;
/* Delete the last and intermediate lines. */
for (lno = tm->lno; lno > fm->lno; --lno)
if (file_dline(sp, ep, lno))
return (1);
/* Reporting. */
vdone: sp->rptlines[L_DELETED] += tm->lno - fm->lno + 1;
done: if (bp != NULL)
FREE_SPACE(sp, bp, blen);
return (0);
/* Free memory. */
err: FREE_SPACE(sp, bp, blen);
return (1);
}
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