1/*	$NetBSD: v_right.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
16static const char sccsid[] = "Id: v_right.c,v 10.8 2001/06/25 15:19:34 skimo Exp  (Berkeley) Date: 2001/06/25 15:19:34 ";
17#endif /* not lint */
18#else
19__RCSID("$NetBSD: v_right.c,v 1.3 2014/01/26 21:43:45 christos Exp $");
20#endif
21
22#include <sys/types.h>
23#include <sys/queue.h>
24#include <sys/time.h>
25
26#include <bitstring.h>
27#include <limits.h>
28#include <stdio.h>
29
30#include "../common/common.h"
31#include "vi.h"
32
33/*
34 * v_right -- [count]' ', [count]l
35 *	Move right by columns.
36 *
37 * PUBLIC: int v_right __P((SCR *, VICMD *));
38 */
39int
40v_right(SCR *sp, VICMD *vp)
41{
42	size_t len;
43	int isempty;
44
45	if (db_eget(sp, vp->m_start.lno, NULL, &len, &isempty)) {
46		if (isempty)
47			goto eol;
48		return (1);
49	}
50
51	/* It's always illegal to move right on empty lines. */
52	if (len == 0) {
53eol:		v_eol(sp, NULL);
54		return (1);
55	}
56
57	/*
58	 * Non-motion commands move to the end of the range.  Delete and
59	 * yank stay at the start.  Ignore others.  Adjust the end of the
60	 * range for motion commands.
61	 *
62	 * !!!
63	 * Historically, "[cdsy]l" worked at the end of a line.  Also,
64	 * EOL is a count sink.
65	 */
66	vp->m_stop.cno = vp->m_start.cno +
67	    (F_ISSET(vp, VC_C1SET) ? vp->count : 1);
68	if (vp->m_start.cno == len - 1 && !ISMOTION(vp)) {
69		v_eol(sp, NULL);
70		return (1);
71	}
72	if (vp->m_stop.cno >= len) {
73		vp->m_stop.cno = len - 1;
74		vp->m_final = ISMOTION(vp) ? vp->m_start : vp->m_stop;
75	} else if (ISMOTION(vp)) {
76		--vp->m_stop.cno;
77		vp->m_final = vp->m_start;
78	} else
79		vp->m_final = vp->m_stop;
80	return (0);
81}
82
83/*
84 * v_dollar -- [count]$
85 *	Move to the last column.
86 *
87 * PUBLIC: int v_dollar __P((SCR *, VICMD *));
88 */
89int
90v_dollar(SCR *sp, VICMD *vp)
91{
92	size_t len;
93	int isempty;
94
95	/*
96	 * !!!
97	 * A count moves down count - 1 rows, so, "3$" is the same as "2j$".
98	 */
99	if ((F_ISSET(vp, VC_C1SET) ? vp->count : 1) != 1) {
100		/*
101		 * !!!
102		 * Historically, if the $ is a motion, and deleting from
103		 * at or before the first non-blank of the line, it's a
104		 * line motion, and the line motion flag is set.
105		 */
106		vp->m_stop.cno = 0;
107		if (nonblank(sp, vp->m_start.lno, &vp->m_stop.cno))
108			return (1);
109		if (ISMOTION(vp) && vp->m_start.cno <= vp->m_stop.cno)
110			F_SET(vp, VM_LMODE);
111
112		--vp->count;
113		if (v_down(sp, vp))
114			return (1);
115	}
116
117	/*
118	 * !!!
119	 * Historically, it was illegal to use $ as a motion command on
120	 * an empty line.  Unfortunately, even though C was historically
121	 * aliased to c$, it (and not c$) was special cased to work on
122	 * empty lines.  Since we alias C to c$ too, we have a problem.
123	 * To fix it, we let c$ go through, on the assumption that it's
124	 * not a problem for it to work.
125	 */
126	if (db_eget(sp, vp->m_stop.lno, NULL, &len, &isempty)) {
127		if (!isempty)
128			return (1);
129		len = 0;
130	}
131
132	if (len == 0) {
133		if (ISMOTION(vp) && !ISCMD(vp->rkp, 'c')) {
134			v_eol(sp, NULL);
135			return (1);
136		}
137		return (0);
138	}
139
140	/*
141	 * Non-motion commands move to the end of the range.  Delete
142	 * and yank stay at the start.  Ignore others.
143	 */
144	vp->m_stop.cno = len ? len - 1 : 0;
145	vp->m_final = ISMOTION(vp) ? vp->m_start : vp->m_stop;
146	return (0);
147}
148