v_delete.c revision 19305 
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[] = "@(#)v_delete.c	10.9 (Berkeley) 10/23/96";
14#endif /* not lint */
15
16#include <sys/types.h>
17#include <sys/queue.h>
18#include <sys/time.h>
19
20#include <bitstring.h>
21#include <limits.h>
22#include <stdio.h>
23
24#include "../common/common.h"
25#include "vi.h"
26
27/*
28 * v_delete -- [buffer][count]d[count]motion
29 *	       [buffer][count]D
30 *	Delete a range of text.
31 *
32 * PUBLIC: int v_delete __P((SCR *, VICMD *));
33 */
34int
35v_delete(sp, vp)
36	SCR *sp;
37	VICMD *vp;
38{
39	recno_t nlines;
40	size_t len;
41	int lmode;
42
43	lmode = F_ISSET(vp, VM_LMODE) ? CUT_LINEMODE : 0;
44
45	/* Yank the lines. */
46	if (cut(sp, F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL,
47	    &vp->m_start, &vp->m_stop,
48	    lmode | (F_ISSET(vp, VM_CUTREQ) ? CUT_NUMREQ : CUT_NUMOPT)))
49		return (1);
50
51	/* Delete the lines. */
52	if (del(sp, &vp->m_start, &vp->m_stop, lmode))
53		return (1);
54
55	/*
56	 * Check for deletion of the entire file.  Try to check a close
57	 * by line so we don't go to the end of the file unnecessarily.
58	 */
59	if (!db_exist(sp, vp->m_final.lno + 1)) {
60		if (db_last(sp, &nlines))
61			return (1);
62		if (nlines == 0) {
63			vp->m_final.lno = 1;
64			vp->m_final.cno = 0;
65			return (0);
66		}
67	}
68
69	/*
70	 * One special correction, in case we've deleted the current line or
71	 * character.  We check it here instead of checking in every command
72	 * that can be a motion component.
73	 */
74	if (db_get(sp, vp->m_final.lno, 0, NULL, &len)) {
75		if (db_get(sp, nlines, DBG_FATAL, NULL, &len))
76			return (1);
77		vp->m_final.lno = nlines;
78	}
79
80	/*
81	 * !!!
82	 * Cursor movements, other than those caused by a line mode command
83	 * moving to another line, historically reset the relative position.
84	 *
85	 * This currently matches the check made in v_yank(), I'm hoping that
86	 * they should be consistent...
87	 */
88	if (!F_ISSET(vp, VM_LMODE)) {
89		F_CLR(vp, VM_RCM_MASK);
90		F_SET(vp, VM_RCM_SET);
91
92		/* Make sure the set cursor position exists. */
93		if (vp->m_final.cno >= len)
94			vp->m_final.cno = len ? len - 1 : 0;
95	}
96
97	/*
98	 * !!!
99	 * The "dd" command moved to the first non-blank; "d<motion>"
100	 * didn't.
101	 */
102	if (F_ISSET(vp, VM_LDOUBLE)) {
103		F_CLR(vp, VM_RCM_MASK);
104		F_SET(vp, VM_RCM_SETFNB);
105	}
106	return (0);
107}
108