1 /*        $NetBSD: v_xchar.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
16 static const char sccsid[] = "Id: v_xchar.c,v 10.10 2001/06/25 15:19:36 skimo Exp  (Berkeley) Date: 2001/06/25 15:19:36 ";
17 #endif /* not lint */
18 #else
19 __RCSID("$NetBSD: v_xchar.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_xchar -- [buffer] [count]x
35  *        Deletes the character(s) on which the cursor sits.
36  *
37  * PUBLIC: int v_xchar __P((SCR *, VICMD *));
38  */
39 int
v_xchar(SCR * sp,VICMD * vp)40 v_xchar(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 nodel;
48                     return (1);
49           }
50           if (len == 0) {
51 nodel:              msgq(sp, M_BERR, "206|No characters to delete");
52                     return (1);
53           }
54 
55           /*
56            * Delete from the cursor toward the end of line, w/o moving the
57            * cursor.
58            *
59            * !!!
60            * Note, "2x" at EOL isn't the same as "xx" because the left movement
61            * of the cursor as part of the 'x' command isn't taken into account.
62            * Historically correct.
63            */
64           if (F_ISSET(vp, VC_C1SET))
65                     vp->m_stop.cno += vp->count - 1;
66           if (vp->m_stop.cno >= len - 1) {
67                     vp->m_stop.cno = len - 1;
68                     vp->m_final.cno = vp->m_start.cno ? vp->m_start.cno - 1 : 0;
69           } else
70                     vp->m_final.cno = vp->m_start.cno;
71 
72           if (cut(sp,
73               F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL,
74               &vp->m_start, &vp->m_stop, 0))
75                     return (1);
76           return (del(sp, &vp->m_start, &vp->m_stop, 0));
77 }
78 
79 /*
80  * v_Xchar -- [buffer] [count]X
81  *        Deletes the character(s) immediately before the current cursor
82  *        position.
83  *
84  * PUBLIC: int v_Xchar __P((SCR *, VICMD *));
85  */
86 int
v_Xchar(SCR * sp,VICMD * vp)87 v_Xchar(SCR *sp, VICMD *vp)
88 {
89           u_long cnt;
90 
91           if (vp->m_start.cno == 0) {
92                     v_sol(sp);
93                     return (1);
94           }
95 
96           cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1;
97           if (cnt >= vp->m_start.cno)
98                     vp->m_start.cno = 0;
99           else
100                     vp->m_start.cno -= cnt;
101           --vp->m_stop.cno;
102           vp->m_final.cno = vp->m_start.cno;
103 
104           if (cut(sp,
105               F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL,
106               &vp->m_start, &vp->m_stop, 0))
107                     return (1);
108           return (del(sp, &vp->m_start, &vp->m_stop, 0));
109 }
110