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