1 /* $OpenBSD: v_xchar.c,v 1.8 2016/01/06 22:28:52 millert 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_xchar -- [buffer] [count]x
27 * Deletes the character(s) on which the cursor sits.
28 *
29 * PUBLIC: int v_xchar(SCR *, VICMD *);
30 */
31 int
v_xchar(SCR * sp,VICMD * vp)32 v_xchar(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 nodel;
40 return (1);
41 }
42 if (len == 0) {
43 nodel: msgq(sp, M_BERR, "No characters to delete");
44 return (1);
45 }
46
47 /*
48 * Delete from the cursor toward the end of line, w/o moving the
49 * cursor.
50 *
51 * !!!
52 * Note, "2x" at EOL isn't the same as "xx" because the left movement
53 * of the cursor as part of the 'x' command isn't taken into account.
54 * Historically correct.
55 */
56 if (F_ISSET(vp, VC_C1SET))
57 vp->m_stop.cno += vp->count - 1;
58 if (vp->m_stop.cno >= len - 1) {
59 vp->m_stop.cno = len - 1;
60 vp->m_final.cno = vp->m_start.cno ? vp->m_start.cno - 1 : 0;
61 } else
62 vp->m_final.cno = vp->m_start.cno;
63
64 if (cut(sp,
65 F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL,
66 &vp->m_start, &vp->m_stop, 0))
67 return (1);
68 return (del(sp, &vp->m_start, &vp->m_stop, 0));
69 }
70
71 /*
72 * v_Xchar -- [buffer] [count]X
73 * Deletes the character(s) immediately before the current cursor
74 * position.
75 *
76 * PUBLIC: int v_Xchar(SCR *, VICMD *);
77 */
78 int
v_Xchar(SCR * sp,VICMD * vp)79 v_Xchar(SCR *sp, VICMD *vp)
80 {
81 u_long cnt;
82
83 if (vp->m_start.cno == 0) {
84 v_sol(sp);
85 return (1);
86 }
87
88 cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1;
89 if (cnt >= vp->m_start.cno)
90 vp->m_start.cno = 0;
91 else
92 vp->m_start.cno -= cnt;
93 --vp->m_stop.cno;
94 vp->m_final.cno = vp->m_start.cno;
95
96 if (cut(sp,
97 F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL,
98 &vp->m_start, &vp->m_stop, 0))
99 return (1);
100 return (del(sp, &vp->m_start, &vp->m_stop, 0));
101 }
102