1 /* $NetBSD: v_delete.c,v 1.3 2014/01/26 21:43:45 christos Exp $ */
2 /*-
3 * Copyright (c) 1992, 1993, 1994
4 * The Regents of the University of California. All rights reserved.
5 * Copyright (c) 1992, 1993, 1994, 1995, 1996
6 * Keith Bostic. All rights reserved.
7 *
8 * See the LICENSE file for redistribution information.
9 */
10
11 #include "config.h"
12
13 #include <sys/cdefs.h>
14 #if 0
15 #ifndef lint
16 static const char sccsid[] = "Id: v_delete.c,v 10.11 2001/06/25 15:19:31 skimo Exp (Berkeley) Date: 2001/06/25 15:19:31 ";
17 #endif /* not lint */
18 #else
19 __RCSID("$NetBSD: v_delete.c,v 1.3 2014/01/26 21:43:45 christos Exp $");
20 #endif
21
22 #include <sys/types.h>
23 #include <sys/queue.h>
24 #include <sys/time.h>
25
26 #include <bitstring.h>
27 #include <limits.h>
28 #include <stdio.h>
29
30 #include "../common/common.h"
31 #include "vi.h"
32
33 /*
34 * v_delete -- [buffer][count]d[count]motion
35 * [buffer][count]D
36 * Delete a range of text.
37 *
38 * PUBLIC: int v_delete __P((SCR *, VICMD *));
39 */
40 int
v_delete(SCR * sp,VICMD * vp)41 v_delete(SCR *sp, VICMD *vp)
42 {
43 db_recno_t nlines;
44 size_t len;
45 int lmode;
46
47 lmode = F_ISSET(vp, VM_LMODE) ? CUT_LINEMODE : 0;
48
49 /* Yank the lines. */
50 if (cut(sp, F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL,
51 &vp->m_start, &vp->m_stop,
52 lmode | (F_ISSET(vp, VM_CUTREQ) ? CUT_NUMREQ : CUT_NUMOPT)))
53 return (1);
54
55 /* Delete the lines. */
56 if (del(sp, &vp->m_start, &vp->m_stop, lmode))
57 return (1);
58
59 /*
60 * Check for deletion of the entire file. Try to check a close
61 * by line so we don't go to the end of the file unnecessarily.
62 */
63 if (!db_exist(sp, vp->m_final.lno + 1)) {
64 if (db_last(sp, &nlines))
65 return (1);
66 if (nlines == 0) {
67 vp->m_final.lno = 1;
68 vp->m_final.cno = 0;
69 return (0);
70 }
71 }
72
73 /*
74 * One special correction, in case we've deleted the current line or
75 * character. We check it here instead of checking in every command
76 * that can be a motion component.
77 */
78 if (db_get(sp, vp->m_final.lno, 0, NULL, &len)) {
79 if (db_get(sp, nlines, DBG_FATAL, NULL, &len))
80 return (1);
81 vp->m_final.lno = nlines;
82 }
83
84 /*
85 * !!!
86 * Cursor movements, other than those caused by a line mode command
87 * moving to another line, historically reset the relative position.
88 *
89 * This currently matches the check made in v_yank(), I'm hoping that
90 * they should be consistent...
91 */
92 if (!F_ISSET(vp, VM_LMODE)) {
93 F_CLR(vp, VM_RCM_MASK);
94 F_SET(vp, VM_RCM_SET);
95
96 /* Make sure the set cursor position exists. */
97 if (vp->m_final.cno >= len)
98 vp->m_final.cno = len ? len - 1 : 0;
99 }
100
101 /*
102 * !!!
103 * The "dd" command moved to the first non-blank; "d<motion>"
104 * didn't.
105 */
106 if (F_ISSET(vp, VM_LDOUBLE)) {
107 F_CLR(vp, VM_RCM_MASK);
108 F_SET(vp, VM_RCM_SETFNB);
109 }
110 return (0);
111 }
112