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
13 static 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(SCR *, MARK *);
36 */
37 void
v_eof(SCR * sp,MARK * mp)38 v_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(SCR *, MARK *);
59 */
60 void
v_eol(SCR * sp,MARK * mp)61 v_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(SCR *);
82 */
83 void
v_nomove(SCR * sp)84 v_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(SCR *, MARK *);
94 */
95 void
v_sof(SCR * sp,MARK * mp)96 v_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(SCR *);
109 */
110 void
v_sol(SCR * sp)111 v_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(CHAR_T *, size_t);
121 */
122 int
v_isempty(CHAR_T * p,size_t len)123 v_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(SCR *, char *, vim_t);
136 */
137 void
v_emsg(SCR * sp,char * p,vim_t which)138 v_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