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#include <sys/types.h>
13#include <sys/queue.h>
14#include <sys/time.h>
15
16#include <bitstring.h>
17#include <ctype.h>
18#include <limits.h>
19#include <stdio.h>
20#include <stdlib.h>
21#include <string.h>
22#include <unistd.h>
23
24#include "../common/common.h"
25#include "vi.h"
26
27/*
28 * v_eof --
29 *	Vi end-of-file error.
30 *
31 * PUBLIC: void v_eof(SCR *, MARK *);
32 */
33void
34v_eof(SCR *sp, MARK *mp)
35{
36	recno_t lno;
37
38	if (mp == NULL)
39		v_emsg(sp, NULL, VIM_EOF);
40	else {
41		if (db_last(sp, &lno))
42			return;
43		if (mp->lno >= lno)
44			v_emsg(sp, NULL, VIM_EOF);
45		else
46			msgq(sp, M_BERR, "195|Movement past the end-of-file");
47	}
48}
49
50/*
51 * v_eol --
52 *	Vi end-of-line error.
53 *
54 * PUBLIC: void v_eol(SCR *, MARK *);
55 */
56void
57v_eol(SCR *sp, MARK *mp)
58{
59	size_t len;
60
61	if (mp == NULL)
62		v_emsg(sp, NULL, VIM_EOL);
63	else {
64		if (db_get(sp, mp->lno, DBG_FATAL, NULL, &len))
65			return;
66		if (mp->cno == len - 1)
67			v_emsg(sp, NULL, VIM_EOL);
68		else
69			msgq(sp, M_BERR, "196|Movement past the end-of-line");
70	}
71}
72
73/*
74 * v_nomove --
75 *	Vi no cursor movement error.
76 *
77 * PUBLIC: void v_nomove(SCR *);
78 */
79void
80v_nomove(SCR *sp)
81{
82	msgq(sp, M_BERR, "197|No cursor movement made");
83}
84
85/*
86 * v_sof --
87 *	Vi start-of-file error.
88 *
89 * PUBLIC: void v_sof(SCR *, MARK *);
90 */
91void
92v_sof(SCR *sp, MARK *mp)
93{
94	if (mp == NULL || mp->lno == 1)
95		msgq(sp, M_BERR, "198|Already at the beginning of the file");
96	else
97		msgq(sp, M_BERR, "199|Movement past the beginning of the file");
98}
99
100/*
101 * v_sol --
102 *	Vi start-of-line error.
103 *
104 * PUBLIC: void v_sol(SCR *);
105 */
106void
107v_sol(SCR *sp)
108{
109	msgq(sp, M_BERR, "200|Already in the first column");
110}
111
112/*
113 * v_isempty --
114 *	Return if the line contains nothing but white-space characters.
115 *
116 * PUBLIC: int v_isempty(CHAR_T *, size_t);
117 */
118int
119v_isempty(CHAR_T *p, size_t len)
120{
121	for (; len--; ++p)
122		if (!isblank(*p))
123			return (0);
124	return (1);
125}
126
127/*
128 * v_emsg --
129 *	Display a few common vi messages.
130 *
131 * PUBLIC: void v_emsg(SCR *, char *, vim_t);
132 */
133void
134v_emsg(SCR *sp, char *p, vim_t which)
135{
136	switch (which) {
137	case VIM_COMBUF:
138		msgq(sp, M_ERR,
139		    "201|Buffers should be specified before the command");
140		break;
141	case VIM_EMPTY:
142		msgq(sp, M_BERR, "209|The file is empty");
143		break;
144	case VIM_EOF:
145		msgq(sp, M_BERR, "202|Already at end-of-file");
146		break;
147	case VIM_EOL:
148		msgq(sp, M_BERR, "203|Already at end-of-line");
149		break;
150	case VIM_NOCOM:
151	case VIM_NOCOM_B:
152		msgq(sp,
153		    which == VIM_NOCOM_B ? M_BERR : M_ERR,
154		    "204|%s isn't a vi command", p);
155		break;
156	case VIM_WRESIZE:
157		msgq(sp, M_ERR, "Window resize interrupted text input mode");
158		break;
159	case VIM_USAGE:
160		msgq(sp, M_ERR, "205|Usage: %s", p);
161		break;
162	}
163}
164