v_xchar.c revision 254225 
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#ifndef lint
13static const char sccsid[] = "$Id: v_xchar.c,v 10.10 2001/06/25 15:19:36 skimo Exp $";
14#endif /* not lint */
15
16#include <sys/types.h>
17#include <sys/queue.h>
18#include <sys/time.h>
19
20#include <bitstring.h>
21#include <limits.h>
22#include <stdio.h>
23
24#include "../common/common.h"
25#include "vi.h"
26
27/*
28 * v_xchar -- [buffer] [count]x
29 *	Deletes the character(s) on which the cursor sits.
30 *
31 * PUBLIC: int v_xchar __P((SCR *, VICMD *));
32 */
33int
34v_xchar(SCR *sp, VICMD *vp)
35{
36	size_t len;
37	int isempty;
38
39	if (db_eget(sp, vp->m_start.lno, NULL, &len, &isempty)) {
40		if (isempty)
41			goto nodel;
42		return (1);
43	}
44	if (len == 0) {
45nodel:		msgq(sp, M_BERR, "206|No characters to delete");
46		return (1);
47	}
48
49	/*
50	 * Delete from the cursor toward the end of line, w/o moving the
51	 * cursor.
52	 *
53	 * !!!
54	 * Note, "2x" at EOL isn't the same as "xx" because the left movement
55	 * of the cursor as part of the 'x' command isn't taken into account.
56	 * Historically correct.
57	 */
58	if (F_ISSET(vp, VC_C1SET))
59		vp->m_stop.cno += vp->count - 1;
60	if (vp->m_stop.cno >= len - 1) {
61		vp->m_stop.cno = len - 1;
62		vp->m_final.cno = vp->m_start.cno ? vp->m_start.cno - 1 : 0;
63	} else
64		vp->m_final.cno = vp->m_start.cno;
65
66	if (cut(sp,
67	    F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL,
68	    &vp->m_start, &vp->m_stop, 0))
69		return (1);
70	return (del(sp, &vp->m_start, &vp->m_stop, 0));
71}
72
73/*
74 * v_Xchar -- [buffer] [count]X
75 *	Deletes the character(s) immediately before the current cursor
76 *	position.
77 *
78 * PUBLIC: int v_Xchar __P((SCR *, VICMD *));
79 */
80int
81v_Xchar(SCR *sp, VICMD *vp)
82{
83	u_long cnt;
84
85	if (vp->m_start.cno == 0) {
86		v_sol(sp);
87		return (1);
88	}
89
90	cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1;
91	if (cnt >= vp->m_start.cno)
92		vp->m_start.cno = 0;
93	else
94		vp->m_start.cno -= cnt;
95	--vp->m_stop.cno;
96	vp->m_final.cno = vp->m_start.cno;
97
98	if (cut(sp,
99	    F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL,
100	    &vp->m_start, &vp->m_stop, 0))
101		return (1);
102	return (del(sp, &vp->m_start, &vp->m_stop, 0));
103}
104