1/*	$NetBSD: v_util.c,v 1.2 2013/11/22 15:52:06 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
16static const char sccsid[] = "Id: v_util.c,v 10.14 2001/06/25 15:19:36 skimo Exp  (Berkeley) Date: 2001/06/25 15:19:36 ";
17#endif /* not lint */
18#else
19__RCSID("$NetBSD$");
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 <ctype.h>
28#include <limits.h>
29#include <stdio.h>
30#include <stdlib.h>
31#include <string.h>
32#include <unistd.h>
33
34#include "../common/common.h"
35#include "vi.h"
36
37/*
38 * v_eof --
39 *	Vi end-of-file error.
40 *
41 * PUBLIC: void v_eof __P((SCR *, MARK *));
42 */
43void
44v_eof(SCR *sp, MARK *mp)
45{
46	db_recno_t lno;
47
48	if (mp == NULL)
49		v_emsg(sp, NULL, VIM_EOF);
50	else {
51		if (db_last(sp, &lno))
52			return;
53		if (mp->lno >= lno)
54			v_emsg(sp, NULL, VIM_EOF);
55		else
56			msgq(sp, M_BERR, "195|Movement past the end-of-file");
57	}
58}
59
60/*
61 * v_eol --
62 *	Vi end-of-line error.
63 *
64 * PUBLIC: void v_eol __P((SCR *, MARK *));
65 */
66void
67v_eol(SCR *sp, MARK *mp)
68{
69	size_t len;
70
71	if (mp == NULL)
72		v_emsg(sp, NULL, VIM_EOL);
73	else {
74		if (db_get(sp, mp->lno, DBG_FATAL, NULL, &len))
75			return;
76		if (mp->cno == len - 1)
77			v_emsg(sp, NULL, VIM_EOL);
78		else
79			msgq(sp, M_BERR, "196|Movement past the end-of-line");
80	}
81}
82
83/*
84 * v_nomove --
85 *	Vi no cursor movement error.
86 *
87 * PUBLIC: void v_nomove __P((SCR *));
88 */
89void
90v_nomove(SCR *sp)
91{
92	msgq(sp, M_BERR, "197|No cursor movement made");
93}
94
95/*
96 * v_sof --
97 *	Vi start-of-file error.
98 *
99 * PUBLIC: void v_sof __P((SCR *, MARK *));
100 */
101void
102v_sof(SCR *sp, MARK *mp)
103{
104	if (mp == NULL || mp->lno == 1)
105		msgq(sp, M_BERR, "198|Already at the beginning of the file");
106	else
107		msgq(sp, M_BERR, "199|Movement past the beginning of the file");
108}
109
110/*
111 * v_sol --
112 *	Vi start-of-line error.
113 *
114 * PUBLIC: void v_sol __P((SCR *));
115 */
116void
117v_sol(SCR *sp)
118{
119	msgq(sp, M_BERR, "200|Already in the first column");
120}
121
122/*
123 * v_isempty --
124 *	Return if the line contains nothing but white-space characters.
125 *
126 * PUBLIC: int v_isempty __P((CHAR_T *, size_t));
127 */
128int
129v_isempty(CHAR_T *p, size_t len)
130{
131	for (; len--; ++p)
132		if (!ISBLANK((UCHAR_T)*p))
133			return (0);
134	return (1);
135}
136
137/*
138 * v_emsg --
139 *	Display a few common vi messages.
140 *
141 * PUBLIC: void v_emsg __P((SCR *, const char *, vim_t));
142 */
143void
144v_emsg(SCR *sp, const char *p, vim_t which)
145{
146	switch (which) {
147	case VIM_COMBUF:
148		msgq(sp, M_ERR,
149		    "201|Buffers should be specified before the command");
150		break;
151	case VIM_EMPTY:
152		msgq(sp, M_BERR, "209|The file is empty");
153		break;
154	case VIM_EOF:
155		msgq(sp, M_BERR, "202|Already at end-of-file");
156		break;
157	case VIM_EOL:
158		msgq(sp, M_BERR, "203|Already at end-of-line");
159		break;
160	case VIM_NOCOM:
161	case VIM_NOCOM_B:
162		msgq(sp,
163		    which == VIM_NOCOM_B ? M_BERR : M_ERR,
164		    "204|%s isn't a vi command", p);
165		break;
166	case VIM_WRESIZE:
167		msgq(sp, M_ERR, "Window resize interrupted text input mode");
168		break;
169	case VIM_USAGE:
170		msgq(sp, M_ERR, "205|Usage: %s", p);
171		break;
172	}
173}
174