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_xchar -- [buffer] [count]x
25 * Deletes the character(s) on which the cursor sits.
26 *
27 * PUBLIC: int v_xchar(SCR *, VICMD *);
28 */
29 int
v_xchar(SCR * sp,VICMD * vp)30 v_xchar(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 nodel;
38 return (1);
39 }
40 if (len == 0) {
41 nodel: msgq(sp, M_BERR, "206|No characters to delete");
42 return (1);
43 }
44
45 /*
46 * Delete from the cursor toward the end of line, w/o moving the
47 * cursor.
48 *
49 * !!!
50 * Note, "2x" at EOL isn't the same as "xx" because the left movement
51 * of the cursor as part of the 'x' command isn't taken into account.
52 * Historically correct.
53 */
54 if (F_ISSET(vp, VC_C1SET))
55 vp->m_stop.cno += vp->count - 1;
56 if (vp->m_stop.cno >= len - 1) {
57 vp->m_stop.cno = len - 1;
58 vp->m_final.cno = vp->m_start.cno ? vp->m_start.cno - 1 : 0;
59 } else
60 vp->m_final.cno = vp->m_start.cno;
61
62 if (cut(sp,
63 F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL,
64 &vp->m_start, &vp->m_stop, 0))
65 return (1);
66 return (del(sp, &vp->m_start, &vp->m_stop, 0));
67 }
68
69 /*
70 * v_Xchar -- [buffer] [count]X
71 * Deletes the character(s) immediately before the current cursor
72 * position.
73 *
74 * PUBLIC: int v_Xchar(SCR *, VICMD *);
75 */
76 int
v_Xchar(SCR * sp,VICMD * vp)77 v_Xchar(SCR *sp, VICMD *vp)
78 {
79 u_long cnt;
80
81 if (vp->m_start.cno == 0) {
82 v_sol(sp);
83 return (1);
84 }
85
86 cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1;
87 if (cnt >= vp->m_start.cno)
88 vp->m_start.cno = 0;
89 else
90 vp->m_start.cno -= cnt;
91 --vp->m_stop.cno;
92 vp->m_final.cno = vp->m_start.cno;
93
94 if (cut(sp,
95 F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL,
96 &vp->m_start, &vp->m_stop, 0))
97 return (1);
98 return (del(sp, &vp->m_start, &vp->m_stop, 0));
99 }
100