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
|
#scope_file
#import "POSIX";
#import "System";
// Required to do unlocking input.
libc :: #system_library "libc";
// https://codebrowser.dev/glibc/glibc/sysdeps/unix/sysv/linux/tcsetattr.c.html
tcsetattr :: (fd : s32, optional_actions : s32, termios_p : *Terminal_IO_Mode) -> s32 #foreign libc;
// https://codebrowser.dev/glibc/glibc/sysdeps/unix/sysv/linux/tcgetattr.c.html
tcgetattr :: (fd : s32, termios_p : *Terminal_IO_Mode) -> s32 #foreign libc;
// Input modes.
// https://elixir.bootlin.com/glibc/latest/source/bits/termios.h
Input_Modes :: enum_flags u32 {
IGNBRK; // Ignore break condition.
BRKINT; // Signal interrupt on break.
IGNPAR; // Ignore characters with parity errors.
PARMRK; // Mark parity and framing errors.
INPCK; // Enable input parity check.
ISTRIP; // Strip 8th bit off characters.
INLCR; // Map NL to CR on input.
IGNCR; // Ignore CR.
ICRNL; // Map CR to NL on input.
IXON; // Enable start/stop output control.
IXOFF; // Enable start/stop input control.
IXANY; // Any character will restart after stop.
_1000_;
IMAXBEL; // Ring bell when input queue is full.
IUCLC; // Translate upper case input to lower case. not in POSIX
_8000_;
}
// Output modes.
// https://elixir.bootlin.com/glibc/latest/source/bits/termios.h
Output_Modes :: enum_flags u32 {
OPOST; // Perform output processing.
ONLCR; // Map NL to CR-NL on output.
_UNUSED_0004_;
ONOEOT; // Discard EOT (^D) on output.
OCRNL; // Map CR to NL.
ONOCR; // Discard CR's when on column 0.
ONLRET; // Move to column 0 on NL.
_UNUSED_0080_;
}
// Control modes.
// https://elixir.bootlin.com/glibc/latest/source/bits/termios.h
Control_Modes :: enum_flags u32 {
CIGNORE; // Ignore these control flags.
_0002_;
_0004_;
_0008_;
_0010_;
_0020_;
_0040_;
_0080_;
_0100_;
_0200_;
CSTOPB; // Two stop bits instead of one.
CREAD; // Enable receiver.
PARENB; // Parity enable.
PARODD; // Odd parity instead of even.
HUPCL; // Hang up on last close.
CLOCAL; // Ignore modem status lines.
CRTSCTS; // RTS/CTS flow control.
CDTRCTS; // DTR/CTS flow control.
_0004_0000_;
_0008_0000_;
MDMBUF; // DTR/DCD flow control.
}
CHWFLOW :Control_Modes : (.MDMBUF | .CRTSCTS | .CDTRCTS); // All types of flow control.
CS5 :Control_Modes : 0x0000; // 5 bits per byte.
CS6 :Control_Modes : 0x0100; // 6 bits per byte.
CS7 :Control_Modes : 0x0200; // 7 bits per byte.
CS8 :Control_Modes : CS6|CS7; // 8 bits per byte.
CSIZE :Control_Modes : CS5|CS6|CS7|CS8; // Number of bits per byte (mask).
// Local modes.
// https://elixir.bootlin.com/glibc/latest/source/bits/termios.h
Local_Modes :: enum_flags u32 {
ECHOKE; // Visual erase for KILL.
ECHOE; // Visual erase for ERASE.
ECHOK; // Echo NL after KILL.
ECHO; // Enable echo.
ECHONL; // Echo NL even if ECHO is off.
ECHOPRT; // Hardcopy visual erase.
ECHOCTL; // Echo control characters as ^X.
ISIG; // Enable signals.
ICANON; // Do erase and kill processing.
ALTWERASE; // Alternate WERASE algorithm.
IEXTEN; // Enable DISCARD and LNEXT.
EXTPROC; // External processing.
_1000_;
_2000_;
_4000_;
_8000_;
_0001_0000_;
_0002_0000_;
// TODO Maybe reduce the amount of unused flags by setting the value when there are holes on the table.
// TOSTOP :: 0x0004_0000; // Send SIGTTOU for background output.
TOSTOP; // Send SIGTTOU for background output.
FLUSHO; // Output being flushed (state).
XCASE; // Canonical upper/lower case.
NOKERNINFO; // Disable VSTATUS.
_0040_0000_;
_0080_0000_;
_0100_0000_;
PENDIN; // Retype pending input (state).
_0400_0000_;
NOFLSH; // Disable flush after interrupt.
}
Terminal_IO_Mode :: struct {
c_iflag : Input_Modes; // Input mode flags.
c_oflag : Output_Modes; // Output mode flags.
c_cflag : Control_Modes; // Control modes flags.
c_lflag : Local_Modes; // Local modes flags.
c_line : u8; // Line discipline.
c_cc : [32]u8; // Control characters.
c_ispeed : u32; // Input speed (baud rates).
c_ospeed : u32; // Output speed (baud rates).
}
initial_tio_mode: Terminal_IO_Mode;
default_tio_mode: Terminal_IO_Mode; // TODO Rename to 'raw_tio_mode'
human_tio_mode: Terminal_IO_Mode; // TODO Rename to 'cooked_tio_mode'
#scope_export
OS_prepare_terminal :: () {
tcgetattr(STDIN_FILENO, *initial_tio_mode);
default_tio_mode = initial_tio_mode;
default_tio_mode.c_iflag &= ~(.IGNBRK | .BRKINT | .PARMRK | .ISTRIP | .INLCR | .IGNCR | .ICRNL | .IXOFF);
default_tio_mode.c_oflag &= ~(.OPOST);
default_tio_mode.c_cflag &= ~(CSIZE | .PARENB);
default_tio_mode.c_lflag &= ~(.ECHOCTL |.ECHO | .ECHOE | .ECHOKE);
human_tio_mode = default_tio_mode;
human_tio_mode.c_iflag |= (.IXOFF | .ICRNL);
human_tio_mode.c_lflag |= (.NOKERNINFO | .ECHO | .ECHOE | .ECHOKE);
tcsetattr(STDIN_FILENO, 0, *default_tio_mode);
}
OS_reset_terminal :: () {
tcsetattr(STDIN_FILENO, 0, *initial_tio_mode);
}
OS_get_terminal_size :: () -> rows: int, columns: int {
auto_release_temp();
input := talloc_string(64);
write_string(Commands.QueryWindowSizeInChars);
input.count = OS_read_input(input.data, input.count);
// Expected message format: [8;<r>;<c>t
// where <r> is the number of rows and <c> of columns.
assert(
input[0] == #char "\e" &&
input[1] == #char "[" &&
input[2] == #char "8",
"Query windows size in chars returned invalid response.");
parts := split(input, ";");
rows := parse_int(*parts[1]);
columns := parse_int(*parts[2]);
return rows, columns;
}
OS_set_input_mode :: (mode: Input_Mode) {
tio_mode: *Terminal_IO_Mode = ---;
if mode == {
case .HUMAN;
tio_mode = *human_tio_mode;
case;
tio_mode = *default_tio_mode;
}
tcsetattr(STDIN_FILENO, 0, tio_mode);
// TODO get_error_value_and_string :: () -> (error_code: OS_Error_Code, description: string)
}
OS_read_input :: (buffer: *u8, bytes_to_read: s64) -> bytes_read: s64, error: bool = false, error_message: string = "" {
bytes_read := read(STDIN_FILENO, buffer, xx bytes_to_read);
if bytes_read < 0 {
error_code, error_message := get_error_value_and_string();
return -1, true, error_message;
}
return bytes_read;
}
|
