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