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[] = "$Id: v_delete.c,v 10.11 2001/06/25 15:19:31 skimo Exp $";
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(SCR *, VICMD *);
33 */
34int
35v_delete(SCR *sp, VICMD *vp)
36{
37	recno_t nlines;
38	size_t len;
39	int lmode;
40
41	lmode = F_ISSET(vp, VM_LMODE) ? CUT_LINEMODE : 0;
42
43	/* Yank the lines. */
44	if (cut(sp, F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL,
45	    &vp->m_start, &vp->m_stop,
46	    lmode | (F_ISSET(vp, VM_CUTREQ) ? CUT_NUMREQ : CUT_NUMOPT)))
47		return (1);
48
49	/* Delete the lines. */
50	if (del(sp, &vp->m_start, &vp->m_stop, lmode))
51		return (1);
52
53	/*
54	 * Check for deletion of the entire file.  Try to check a close
55	 * by line so we don't go to the end of the file unnecessarily.
56	 */
57	if (!db_exist(sp, vp->m_final.lno + 1)) {
58		if (db_last(sp, &nlines))
59			return (1);
60		if (nlines == 0) {
61			vp->m_final.lno = 1;
62			vp->m_final.cno = 0;
63			return (0);
64		}
65	}
66
67	/*
68	 * One special correction, in case we've deleted the current line or
69	 * character.  We check it here instead of checking in every command
70	 * that can be a motion component.
71	 */
72	if (db_get(sp, vp->m_final.lno, 0, NULL, &len)) {
73		if (db_get(sp, nlines, DBG_FATAL, NULL, &len))
74			return (1);
75		vp->m_final.lno = nlines;
76	}
77
78	/*
79	 * !!!
80	 * Cursor movements, other than those caused by a line mode command
81	 * moving to another line, historically reset the relative position.
82	 *
83	 * This currently matches the check made in v_yank(), I'm hoping that
84	 * they should be consistent...
85	 */
86	if (!F_ISSET(vp, VM_LMODE)) {
87		F_CLR(vp, VM_RCM_MASK);
88		F_SET(vp, VM_RCM_SET);
89
90		/* Make sure the set cursor position exists. */
91		if (vp->m_final.cno >= len)
92			vp->m_final.cno = len ? len - 1 : 0;
93	}
94
95	/*
96	 * !!!
97	 * The "dd" command moved to the first non-blank; "d<motion>"
98	 * didn't.
99	 */
100	if (F_ISSET(vp, VM_LDOUBLE)) {
101		F_CLR(vp, VM_RCM_MASK);
102		F_SET(vp, VM_RCM_SETFNB);
103	}
104	return (0);
105}
106