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
|
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdarg.h>
#include <termios.h>
#include <sys/ioctl.h>
#include <sys/select.h>
#include <signal.h>
#include <errno.h>
#include "tty.h"
#include "../config.h"
void tty_reset(tty_t *tty) {
tcsetattr(tty->fdin, TCSANOW, &tty->original_termios);
}
void tty_close(tty_t *tty) {
tty_reset(tty);
fclose(tty->fout);
close(tty->fdin);
}
static void handle_sigwinch(int sig){
(void)sig;
}
void tty_init(tty_t *tty, const char *tty_filename) {
tty->fdin = open(tty_filename, O_RDONLY);
if (tty->fdin < 0) {
perror("Failed to open tty");
exit(EXIT_FAILURE);
}
tty->fout = fopen(tty_filename, "w");
if (!tty->fout) {
perror("Failed to open tty");
exit(EXIT_FAILURE);
}
if (setvbuf(tty->fout, NULL, _IOFBF, 4096)) {
perror("setvbuf");
exit(EXIT_FAILURE);
}
if (tcgetattr(tty->fdin, &tty->original_termios)) {
perror("tcgetattr");
exit(EXIT_FAILURE);
}
struct termios new_termios = tty->original_termios;
/*
* Disable all of
* ICANON Canonical input (erase and kill processing).
* ECHO Echo.
* ISIG Signals from control characters
* ICRNL Conversion of CR characters into NL
*/
new_termios.c_iflag &= ~(ICRNL);
new_termios.c_lflag &= ~(ICANON | ECHO | ISIG);
if (tcsetattr(tty->fdin, TCSANOW, &new_termios))
perror("tcsetattr");
tty_getwinsz(tty);
tty_setnormal(tty);
signal(SIGWINCH, handle_sigwinch);
}
void tty_getwinsz(tty_t *tty) {
struct winsize ws;
if (ioctl(fileno(tty->fout), TIOCGWINSZ, &ws) == -1) {
tty->maxwidth = 80;
tty->maxheight = 25;
} else {
tty->maxwidth = ws.ws_col;
tty->maxheight = ws.ws_row;
}
}
char tty_getchar(tty_t *tty) {
char ch;
int size = read(tty->fdin, &ch, 1);
if (size < 0) {
perror("error reading from tty");
exit(EXIT_FAILURE);
} else if (size == 0) {
/* EOF */
exit(EXIT_FAILURE);
} else {
return ch;
}
}
int tty_input_ready(tty_t *tty, long int timeout, int return_on_signal) {
fd_set readfs;
FD_ZERO(&readfs);
FD_SET(tty->fdin, &readfs);
struct timespec ts = {timeout / 1000, (timeout % 1000) * 1000000};
sigset_t mask;
sigemptyset(&mask);
if (!return_on_signal)
sigaddset(&mask, SIGWINCH);
int err = pselect(
tty->fdin + 1,
&readfs,
NULL,
NULL,
timeout < 0 ? NULL : &ts,
return_on_signal ? NULL : &mask);
if (err < 0) {
if (errno == EINTR) {
return 0;
} else {
perror("select");
exit(EXIT_FAILURE);
}
} else {
return FD_ISSET(tty->fdin, &readfs);
}
}
static void tty_sgr(tty_t *tty, int code) {
tty_printf(tty, "%c%c%im", 0x1b, '[', code);
}
void tty_setfg(tty_t *tty, int fg) {
if (tty->fgcolor != fg) {
tty_sgr(tty, 30 + fg);
tty->fgcolor = fg;
}
}
void tty_setinvert(tty_t *tty) {
tty_sgr(tty, 7);
}
void tty_setunderline(tty_t *tty) {
tty_sgr(tty, 4);
}
void tty_setnormal(tty_t *tty) {
tty_sgr(tty, 0);
tty->fgcolor = 9;
}
void tty_setnowrap(tty_t *tty) {
tty_printf(tty, "%c%c?7l", 0x1b, '[');
}
void tty_setwrap(tty_t *tty) {
tty_printf(tty, "%c%c?7h", 0x1b, '[');
}
void tty_newline(tty_t *tty) {
tty_printf(tty, "%c%cK\n", 0x1b, '[');
}
void tty_clearline(tty_t *tty) {
tty_printf(tty, "%c%cK", 0x1b, '[');
}
void tty_setcol(tty_t *tty, int col) {
tty_printf(tty, "%c%c%iG", 0x1b, '[', col + 1);
}
void tty_moveup(tty_t *tty, int i) {
tty_printf(tty, "%c%c%iA", 0x1b, '[', i);
}
void tty_printf(tty_t *tty, const char *fmt, ...) {
va_list args;
va_start(args, fmt);
vfprintf(tty->fout, fmt, args);
va_end(args);
}
void tty_putc(tty_t *tty, char c) {
fputc(c, tty->fout);
}
void tty_flush(tty_t *tty) {
fflush(tty->fout);
}
size_t tty_getwidth(tty_t *tty) {
return tty->maxwidth;
}
size_t tty_getheight(tty_t *tty) {
return tty->maxheight;
}
|
