xref: /netbsd/external/bsd/nvi/dist/vi/v_util.c (revision cc73507a)
1 /*	$NetBSD: v_util.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_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: v_util.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 <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  */
43 void
v_eof(SCR * sp,MARK * mp)44 v_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  */
66 void
v_eol(SCR * sp,MARK * mp)67 v_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  */
89 void
v_nomove(SCR * sp)90 v_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  */
101 void
v_sof(SCR * sp,MARK * mp)102 v_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  */
116 void
v_sol(SCR * sp)117 v_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  */
128 int
v_isempty(CHAR_T * p,size_t len)129 v_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  */
143 void
v_emsg(SCR * sp,const char * p,vim_t which)144 v_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