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_util.c,v 10.14 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 <ctype.h>
22#include <limits.h>
23#include <stdio.h>
24#include <stdlib.h>
25#include <string.h>
26#include <unistd.h>
27
28#include "../common/common.h"
29#include "vi.h"
30
31/*
32 * v_eof --
33 *	Vi end-of-file error.
34 *
35 * PUBLIC: void v_eof __P((SCR *, MARK *));
36 */
37void
38v_eof(SCR *sp, MARK *mp)
39{
40	recno_t lno;
41
42	if (mp == NULL)
43		v_emsg(sp, NULL, VIM_EOF);
44	else {
45		if (db_last(sp, &lno))
46			return;
47		if (mp->lno >= lno)
48			v_emsg(sp, NULL, VIM_EOF);
49		else
50			msgq(sp, M_BERR, "195|Movement past the end-of-file");
51	}
52}
53
54/*
55 * v_eol --
56 *	Vi end-of-line error.
57 *
58 * PUBLIC: void v_eol __P((SCR *, MARK *));
59 */
60void
61v_eol(SCR *sp, MARK *mp)
62{
63	size_t len;
64
65	if (mp == NULL)
66		v_emsg(sp, NULL, VIM_EOL);
67	else {
68		if (db_get(sp, mp->lno, DBG_FATAL, NULL, &len))
69			return;
70		if (mp->cno == len - 1)
71			v_emsg(sp, NULL, VIM_EOL);
72		else
73			msgq(sp, M_BERR, "196|Movement past the end-of-line");
74	}
75}
76
77/*
78 * v_nomove --
79 *	Vi no cursor movement error.
80 *
81 * PUBLIC: void v_nomove __P((SCR *));
82 */
83void
84v_nomove(SCR *sp)
85{
86	msgq(sp, M_BERR, "197|No cursor movement made");
87}
88
89/*
90 * v_sof --
91 *	Vi start-of-file error.
92 *
93 * PUBLIC: void v_sof __P((SCR *, MARK *));
94 */
95void
96v_sof(SCR *sp, MARK *mp)
97{
98	if (mp == NULL || mp->lno == 1)
99		msgq(sp, M_BERR, "198|Already at the beginning of the file");
100	else
101		msgq(sp, M_BERR, "199|Movement past the beginning of the file");
102}
103
104/*
105 * v_sol --
106 *	Vi start-of-line error.
107 *
108 * PUBLIC: void v_sol __P((SCR *));
109 */
110void
111v_sol(SCR *sp)
112{
113	msgq(sp, M_BERR, "200|Already in the first column");
114}
115
116/*
117 * v_isempty --
118 *	Return if the line contains nothing but white-space characters.
119 *
120 * PUBLIC: int v_isempty __P((CHAR_T *, size_t));
121 */
122int
123v_isempty(CHAR_T *p, size_t len)
124{
125	for (; len--; ++p)
126		if (!isblank(*p))
127			return (0);
128	return (1);
129}
130
131/*
132 * v_emsg --
133 *	Display a few common vi messages.
134 *
135 * PUBLIC: void v_emsg __P((SCR *, char *, vim_t));
136 */
137void
138v_emsg(SCR *sp, char *p, vim_t which)
139{
140	switch (which) {
141	case VIM_COMBUF:
142		msgq(sp, M_ERR,
143		    "201|Buffers should be specified before the command");
144		break;
145	case VIM_EMPTY:
146		msgq(sp, M_BERR, "209|The file is empty");
147		break;
148	case VIM_EOF:
149		msgq(sp, M_BERR, "202|Already at end-of-file");
150		break;
151	case VIM_EOL:
152		msgq(sp, M_BERR, "203|Already at end-of-line");
153		break;
154	case VIM_NOCOM:
155	case VIM_NOCOM_B:
156		msgq(sp,
157		    which == VIM_NOCOM_B ? M_BERR : M_ERR,
158		    "204|%s isn't a vi command", p);
159		break;
160	case VIM_WRESIZE:
161		msgq(sp, M_ERR, "Window resize interrupted text input mode");
162		break;
163	case VIM_USAGE:
164		msgq(sp, M_ERR, "205|Usage: %s", p);
165		break;
166	}
167}
168