ex_delete.c revision 1.6 
1/*	$OpenBSD: ex_delete.c,v 1.6 2009/10/27 23:59:47 deraadt Exp $	*/
2
3/*-
4 * Copyright (c) 1992, 1993, 1994
5 *	The Regents of the University of California.  All rights reserved.
6 * Copyright (c) 1992, 1993, 1994, 1995, 1996
7 *	Keith Bostic.  All rights reserved.
8 *
9 * See the LICENSE file for redistribution information.
10 */
11
12#include "config.h"
13
14#include <sys/types.h>
15#include <sys/queue.h>
16
17#include <bitstring.h>
18#include <limits.h>
19#include <stdio.h>
20
21#include "../common/common.h"
22
23/*
24 * ex_delete: [line [,line]] d[elete] [buffer] [count] [flags]
25 *
26 *	Delete lines from the file.
27 *
28 * PUBLIC: int ex_delete(SCR *, EXCMD *);
29 */
30int
31ex_delete(sp, cmdp)
32	SCR *sp;
33	EXCMD *cmdp;
34{
35	recno_t lno;
36
37	NEEDFILE(sp, cmdp);
38
39	/*
40	 * !!!
41	 * Historically, lines deleted in ex were not placed in the numeric
42	 * buffers.  We follow historic practice so that we don't overwrite
43	 * vi buffers accidentally.
44	 */
45	if (cut(sp,
46	    FL_ISSET(cmdp->iflags, E_C_BUFFER) ? &cmdp->buffer : NULL,
47	    &cmdp->addr1, &cmdp->addr2, CUT_LINEMODE))
48		return (1);
49
50	/* Delete the lines. */
51	if (del(sp, &cmdp->addr1, &cmdp->addr2, 1))
52		return (1);
53
54	/* Set the cursor to the line after the last line deleted. */
55	sp->lno = cmdp->addr1.lno;
56
57	/* Or the last line in the file if deleted to the end of the file. */
58	if (db_last(sp, &lno))
59		return (1);
60	if (sp->lno > lno)
61		sp->lno = lno;
62	return (0);
63}
64