ex_delete.c revision 1.3 
1/*-
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.
6 *
7 * See the LICENSE file for redistribution information.
8 */
9
10#include "config.h"
11
12#ifndef lint
13static const char sccsid[] = "@(#)ex_delete.c	10.9 (Berkeley) 10/23/96";
14#endif /* not lint */
15
16#include <sys/types.h>
17#include <sys/queue.h>
18
19#include <bitstring.h>
20#include <limits.h>
21#include <stdio.h>
22
23#include "../common/common.h"
24
25/*
26 * ex_delete: [line [,line]] d[elete] [buffer] [count] [flags]
27 *
28 *	Delete lines from the file.
29 *
30 * PUBLIC: int ex_delete __P((SCR *, EXCMD *));
31 */
32int
33ex_delete(sp, cmdp)
34	SCR *sp;
35	EXCMD *cmdp;
36{
37	recno_t lno;
38
39	NEEDFILE(sp, cmdp);
40
41	/*
42	 * !!!
43	 * Historically, lines deleted in ex were not placed in the numeric
44	 * buffers.  We follow historic practice so that we don't overwrite
45	 * vi buffers accidentally.
46	 */
47	if (cut(sp,
48	    FL_ISSET(cmdp->iflags, E_C_BUFFER) ? &cmdp->buffer : NULL,
49	    &cmdp->addr1, &cmdp->addr2, CUT_LINEMODE))
50		return (1);
51
52	/* Delete the lines. */
53	if (del(sp, &cmdp->addr1, &cmdp->addr2, 1))
54		return (1);
55
56	/* Set the cursor to the line after the last line deleted. */
57	sp->lno = cmdp->addr1.lno;
58
59	/* Or the last line in the file if deleted to the end of the file. */
60	if (db_last(sp, &lno))
61		return (1);
62	if (sp->lno > lno)
63		sp->lno = lno;
64	return (0);
65}
66