1 /* $OpenBSD: v_util.c,v 1.8 2016/01/06 22:28:52 millert Exp $ */
2
3 /*-
4 * Copyright (c) 1992, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
6 * Copyright (c) 1992, 1993, 1994, 1995, 1996
7 * Keith Bostic. All rights reserved.
8 *
9 * See the LICENSE file for redistribution information.
10 */
11
12 #include "config.h"
13
14 #include <sys/types.h>
15 #include <sys/queue.h>
16 #include <sys/time.h>
17
18 #include <bitstring.h>
19 #include <ctype.h>
20 #include <limits.h>
21 #include <stdio.h>
22 #include <stdlib.h>
23 #include <string.h>
24 #include <unistd.h>
25
26 #include "../common/common.h"
27 #include "vi.h"
28
29 /*
30 * v_eof --
31 * Vi end-of-file error.
32 *
33 * PUBLIC: void v_eof(SCR *, MARK *);
34 */
35 void
v_eof(SCR * sp,MARK * mp)36 v_eof(SCR *sp, MARK *mp)
37 {
38 recno_t lno;
39
40 if (mp == NULL)
41 v_emsg(sp, NULL, VIM_EOF);
42 else {
43 if (db_last(sp, &lno))
44 return;
45 if (mp->lno >= lno)
46 v_emsg(sp, NULL, VIM_EOF);
47 else
48 msgq(sp, M_BERR, "Movement past the end-of-file");
49 }
50 }
51
52 /*
53 * v_eol --
54 * Vi end-of-line error.
55 *
56 * PUBLIC: void v_eol(SCR *, MARK *);
57 */
58 void
v_eol(SCR * sp,MARK * mp)59 v_eol(SCR *sp, MARK *mp)
60 {
61 size_t len;
62
63 if (mp == NULL)
64 v_emsg(sp, NULL, VIM_EOL);
65 else {
66 if (db_get(sp, mp->lno, DBG_FATAL, NULL, &len))
67 return;
68 if (mp->cno == len - 1)
69 v_emsg(sp, NULL, VIM_EOL);
70 else
71 msgq(sp, M_BERR, "Movement past the end-of-line");
72 }
73 }
74
75 /*
76 * v_nomove --
77 * Vi no cursor movement error.
78 *
79 * PUBLIC: void v_nomove(SCR *);
80 */
81 void
v_nomove(SCR * sp)82 v_nomove(SCR *sp)
83 {
84 msgq(sp, M_BERR, "No cursor movement made");
85 }
86
87 /*
88 * v_sof --
89 * Vi start-of-file error.
90 *
91 * PUBLIC: void v_sof(SCR *, MARK *);
92 */
93 void
v_sof(SCR * sp,MARK * mp)94 v_sof(SCR *sp, MARK *mp)
95 {
96 if (mp == NULL || mp->lno == 1)
97 msgq(sp, M_BERR, "Already at the beginning of the file");
98 else
99 msgq(sp, M_BERR, "Movement past the beginning of the file");
100 }
101
102 /*
103 * v_sol --
104 * Vi start-of-line error.
105 *
106 * PUBLIC: void v_sol(SCR *);
107 */
108 void
v_sol(SCR * sp)109 v_sol(SCR *sp)
110 {
111 msgq(sp, M_BERR, "Already in the first column");
112 }
113
114 /*
115 * v_isempty --
116 * Return if the line contains nothing but white-space characters.
117 *
118 * PUBLIC: int v_isempty(char *, size_t);
119 */
120 int
v_isempty(char * p,size_t len)121 v_isempty(char *p, size_t len)
122 {
123 for (; len--; ++p)
124 if (!isblank(*p))
125 return (0);
126 return (1);
127 }
128
129 /*
130 * v_emsg --
131 * Display a few common vi messages.
132 *
133 * PUBLIC: void v_emsg(SCR *, char *, vim_t);
134 */
135 void
v_emsg(SCR * sp,char * p,vim_t which)136 v_emsg(SCR *sp, char *p, vim_t which)
137 {
138 switch (which) {
139 case VIM_COMBUF:
140 msgq(sp, M_ERR,
141 "Buffers should be specified before the command");
142 break;
143 case VIM_EMPTY:
144 msgq(sp, M_BERR, "The file is empty");
145 break;
146 case VIM_EOF:
147 msgq(sp, M_BERR, "Already at end-of-file");
148 break;
149 case VIM_EOL:
150 msgq(sp, M_BERR, "Already at end-of-line");
151 break;
152 case VIM_NOCOM:
153 case VIM_NOCOM_B:
154 msgq(sp,
155 which == VIM_NOCOM_B ? M_BERR : M_ERR,
156 "%s isn't a vi command", p);
157 break;
158 case VIM_WRESIZE:
159 msgq(sp, M_ERR, "Window resize interrupted text input mode");
160 break;
161 case VIM_USAGE:
162 msgq(sp, M_ERR, "Usage: %s", p);
163 break;
164 }
165 }
166