1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
/* $OpenBSD: tgoto.c,v 1.1 1998/07/23 21:10:28 millert Exp $ */
/* $NetBSD: tgoto.c,v 1.5 1995/06/05 19:45:54 pk Exp $ */
/*
* Copyright (c) 1980, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
#if 0
static char sccsid[] = "@(#)tgoto.c 8.1 (Berkeley) 6/4/93";
#else
static char rcsid[] = "$OpenBSD: tgoto.c,v 1.1 1998/07/23 21:10:28 millert Exp $";
#endif
#endif /* not lint */
#include <string.h>
#include <curses.h>
#define CTRL(c) ((c) & 037)
#define MAXRETURNSIZE 64
char *UP;
char *BC;
/*
* Routine to perform cursor addressing.
* CM is a string containing printf type escapes to allow
* cursor addressing. We start out ready to print the destination
* line, and switch each time we print row or column.
* The following escapes are defined for substituting row/column:
*
* %d as in printf
* %2 like %2d
* %3 like %3d
* %. gives %c hacking special case characters
* %+x like %c but adding x first
*
* The codes below affect the state but don't use up a value.
*
* %>xy if value > x add y
* %r reverses row/column
* %i increments row/column (for one origin indexing)
* %% gives %
* %B BCD (2 decimal digits encoded in one byte)
* %D Delta Data (backwards bcd)
*
* all other characters are ``self-inserting''.
*/
char *
tgoto(CM, destcol, destline)
char *CM;
int destcol, destline;
{
static char result[MAXRETURNSIZE];
static char added[10];
char *cp = CM;
register char *dp = result;
register int c;
int oncol = 0;
register int which = destline;
if (cp == 0) {
toohard:
/*
* ``We don't do that under BOZO's big top''
*/
return ("OOPS");
}
added[0] = 0;
while ((c = *cp++) != '\0') {
if (c != '%') {
if (dp >= &result[MAXRETURNSIZE])
goto toohard;
*dp++ = c;
continue;
}
switch (c = *cp++) {
#ifdef CM_N
case 'n':
destcol ^= 0140;
destline ^= 0140;
goto setwhich;
#endif
case 'd':
if (which < 10)
goto one;
if (which < 100)
goto two;
/* fall into... */
case '3':
if (dp >= &result[MAXRETURNSIZE])
goto toohard;
*dp++ = (which / 100) | '0';
which %= 100;
/* fall into... */
case '2':
two:
if (dp >= &result[MAXRETURNSIZE])
goto toohard;
*dp++ = which / 10 | '0';
one:
if (dp >= &result[MAXRETURNSIZE])
goto toohard;
*dp++ = which % 10 | '0';
swap:
oncol = 1 - oncol;
setwhich:
which = oncol ? destcol : destline;
continue;
#ifdef CM_GT
case '>':
if (which > *cp++)
which += *cp++;
else
cp++;
continue;
#endif
case '+':
which += *cp++;
/* fall into... */
case '.':
/*
* This code is worth scratching your head at for a
* while. The idea is that various weird things can
* happen to nulls, EOT's, tabs, and newlines by the
* tty driver, arpanet, and so on, so we don't send
* them if we can help it.
*
* Tab is taken out to get Ann Arbors to work, otherwise
* when they go to column 9 we increment which is wrong
* because bcd isn't continuous. We should take out
* the rest too, or run the thing through more than
* once until it doesn't make any of these, but that
* would make termlib (and hence pdp-11 ex) bigger,
* and also somewhat slower. This requires all
* programs which use termlib to stty tabs so they
* don't get expanded. They should do this anyway
* because some terminals use ^I for other things,
* like nondestructive space.
*/
if (which == 0 || which == CTRL('d') || /* which == '\t' || */ which == '\n') {
if (oncol || UP) /* Assumption: backspace works */
/*
* Loop needed because newline happens
* to be the successor of tab.
*/
do {
if (strlen(added) + 1 >= sizeof(added))
goto toohard;
strcat(added, oncol ? (BC ? BC : "\b") : UP);
which++;
} while (which == '\n');
}
if (dp >= &result[MAXRETURNSIZE])
goto toohard;
*dp++ = which;
goto swap;
case 'r':
oncol = 1;
goto setwhich;
case 'i':
destcol++;
destline++;
which++;
continue;
case '%':
if (dp >= &result[MAXRETURNSIZE])
goto toohard;
*dp++ = c;
continue;
#ifdef CM_B
case 'B':
which = (which/10 << 4) + which%10;
continue;
#endif
#ifdef CM_D
case 'D':
which = which - 2 * (which%16);
continue;
#endif
default:
goto toohard;
}
}
if (dp - result + strlen(added) >= MAXRETURNSIZE - 1)
goto toohard;
strcpy(dp, added);
return (result);
}
|
