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
|
/*
* map.c -- mapping routines.
*
* Copyright (C) 1998 by Massimiliano Ghilardi
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <ctype.h>
#include <time.h>
#include <sys/types.h>
#include <sys/time.h>
#include "defines.h"
#include "main.h"
#include "tty.h"
#include "edit.h"
#include "tcp.h"
#include "list.h"
/*
* mapping variables
*/
static char mappath[MAX_MAPLEN]; /* circular path list */
static int mapstart = 0; /* index to first map entry */
static int mapend = 0; /* index one past last map entry */
#define MAPINDEX(i) (((i) + MAX_MAPLEN) % MAX_MAPLEN)
#define MAPENTRY(i) mappath[MAPINDEX(i)]
/*
* return reverse direction
*/
static char reverse_dir(char dir)
{
static char dirs[] = "nsewud";
char *p = strchr(dirs, dir);
return p ? dirs[(p - dirs) ^ 1] : 0;
}
/*
* retrace steps on map, optionally walk them back
*/
void map_retrace(int steps, int walk_back)
{
char cmd[2];
cmd[1] = '\0';
if (!steps && !walk_back)
mapend = mapstart;
else {
if (!steps)
steps = -1;
if (walk_back && opt_echo) {
status(1);
tty_putc('[');
}
while (mapstart != mapend && steps--) {
mapend = MAPINDEX(mapend - 1);
if (walk_back) {
cmd[0] = reverse_dir(mappath[mapend]);
if (opt_echo)
tty_putc(cmd[0]);
tcp_write(tcp_fd, cmd);
}
}
if (walk_back && opt_echo)
tty_puts("]\n");
}
}
/*
* show automatic map (latest steps) in the form s2ews14n
*/
void map_show(void)
{
char lastdir;
int count = 0;
int i;
if (mapstart == mapend) {
PRINTF("#map empty\n");
} else {
PRINTF("#map: ");
lastdir = mappath[mapstart];
for (i = mapstart; i != mapend; i = MAPINDEX(i + 1)) {
if (mappath[i] != lastdir) {
if (count > 1)
tty_printf("%d", count);
tty_putc(lastdir);
count = 1;
lastdir = mappath[i];
} else
count++;
}
if (count > 1)
tty_printf("%d", count);
tty_printf("%c\n", lastdir);
}
}
/*
* print map to string in the form seewsnnnnn
*/
void map_sprintf(char *buf)
{
int i;
if (mapstart != mapend)
for (i = mapstart; i != mapend; i = MAPINDEX(i + 1))
*buf++ = mappath[i];
*buf = '\0';
}
/*
* add direction to automap
*/
void map_add_dir(char dir)
{
#ifdef NOMAZEMAPPING
if (mapend != mapstart && dir == reverse_dir(MAPENTRY(mapend - 1))) {
mapend = MAPINDEX(mapend - 1); /* retrace one step */
} else
#endif
{
MAPENTRY(mapend) = dir;
mapend = MAPINDEX(mapend + 1);
if(mapend == mapstart)
mapstart = MAPINDEX(mapstart + 1);
}
}
/*
* execute walk if word is valid [speed]walk sequence -
* return 1 if walked, 0 if not
*/
int map_walk(char *word, int silent, int maponly)
{
char buf[16];
int n = strlen(word);
int is_main = (tcp_fd == tcp_main_fd);
if (!is_main && !maponly && !opt_speedwalk)
return 0;
if (!n || (n > 1 && !opt_speedwalk && !maponly) ||
!strchr("neswud", word[n - 1]) ||
(int)strspn(word, "neswud0123456789") != n)
return 0;
if (maponly)
silent = 1;
buf[1] = '\0';
while (*word) {
if (!silent) { status(1); tty_putc('['); }
if (isdigit(*word)) {
n = strtol(word, &word, 10);
if (!silent)
tty_printf("%d", n);
} else
n = 1;
if (!silent)
tty_putc(*word);
while (n--) {
*buf = *word;
if (!maponly) {
if (*lookup_alias(buf))
parse_instruction(buf, 1, 0, 0); /* we want to execute aliases n,e,s,w,u,d */
else tcp_write(tcp_fd, buf);
}
if (is_main || maponly)
map_add_dir(*word);
}
if (!silent)
tty_puts("] ");
word++;
}
if (!silent)
tty_putc('\n');
return !maponly;
}
|
