1 /* $OpenBSD: v_right.c,v 1.6 2014/11/12 04:28:41 bentley 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 #include <sys/time.h>
17
18 #include <bitstring.h>
19 #include <limits.h>
20 #include <stdio.h>
21
22 #include "../common/common.h"
23 #include "vi.h"
24
25 /*
26 * v_right -- [count]' ', [count]l
27 * Move right by columns.
28 *
29 * PUBLIC: int v_right(SCR *, VICMD *);
30 */
31 int
v_right(SCR * sp,VICMD * vp)32 v_right(SCR *sp, VICMD *vp)
33 {
34 size_t len;
35 int isempty;
36
37 if (db_eget(sp, vp->m_start.lno, NULL, &len, &isempty)) {
38 if (isempty)
39 goto eol;
40 return (1);
41 }
42
43 /* It's always illegal to move right on empty lines. */
44 if (len == 0) {
45 eol: v_eol(sp, NULL);
46 return (1);
47 }
48
49 /*
50 * Non-motion commands move to the end of the range. Delete and
51 * yank stay at the start. Ignore others. Adjust the end of the
52 * range for motion commands.
53 *
54 * !!!
55 * Historically, "[cdsy]l" worked at the end of a line. Also,
56 * EOL is a count sink.
57 */
58 vp->m_stop.cno = vp->m_start.cno +
59 (F_ISSET(vp, VC_C1SET) ? vp->count : 1);
60 if (vp->m_start.cno == len - 1 && !ISMOTION(vp)) {
61 v_eol(sp, NULL);
62 return (1);
63 }
64 if (vp->m_stop.cno >= len) {
65 vp->m_stop.cno = len - 1;
66 vp->m_final = ISMOTION(vp) ? vp->m_start : vp->m_stop;
67 } else if (ISMOTION(vp)) {
68 --vp->m_stop.cno;
69 vp->m_final = vp->m_start;
70 } else
71 vp->m_final = vp->m_stop;
72 return (0);
73 }
74
75 /*
76 * v_dollar -- [count]$
77 * Move to the last column.
78 *
79 * PUBLIC: int v_dollar(SCR *, VICMD *);
80 */
81 int
v_dollar(SCR * sp,VICMD * vp)82 v_dollar(SCR *sp, VICMD *vp)
83 {
84 size_t len;
85 int isempty;
86
87 /*
88 * !!!
89 * A count moves down count - 1 rows, so, "3$" is the same as "2j$".
90 */
91 if ((F_ISSET(vp, VC_C1SET) ? vp->count : 1) != 1) {
92 /*
93 * !!!
94 * Historically, if the $ is a motion, and deleting from
95 * at or before the first non-blank of the line, it's a
96 * line motion, and the line motion flag is set.
97 */
98 vp->m_stop.cno = 0;
99 if (nonblank(sp, vp->m_start.lno, &vp->m_stop.cno))
100 return (1);
101 if (ISMOTION(vp) && vp->m_start.cno <= vp->m_stop.cno)
102 F_SET(vp, VM_LMODE);
103
104 --vp->count;
105 if (v_down(sp, vp))
106 return (1);
107 }
108
109 /*
110 * !!!
111 * Historically, it was illegal to use $ as a motion command on
112 * an empty line. Unfortunately, even though C was historically
113 * aliased to c$, it (and not c$) was special cased to work on
114 * empty lines. Since we alias C to c$ too, we have a problem.
115 * To fix it, we let c$ go through, on the assumption that it's
116 * not a problem for it to work.
117 */
118 if (db_eget(sp, vp->m_stop.lno, NULL, &len, &isempty)) {
119 if (!isempty)
120 return (1);
121 len = 0;
122 }
123
124 if (len == 0) {
125 if (ISMOTION(vp) && !ISCMD(vp->rkp, 'c')) {
126 v_eol(sp, NULL);
127 return (1);
128 }
129 return (0);
130 }
131
132 /*
133 * Non-motion commands move to the end of the range. Delete
134 * and yank stay at the start. Ignore others.
135 */
136 vp->m_stop.cno = len ? len - 1 : 0;
137 vp->m_final = ISMOTION(vp) ? vp->m_start : vp->m_stop;
138 return (0);
139 }
140