-
Notifications
You must be signed in to change notification settings - Fork 4
/
rterm.c
220 lines (193 loc) · 4.76 KB
/
rterm.c
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
/*
======================================================================
Module to control some display routines that implement ANSI functions.
on LINUX Terminals
@author : Velorek (routines extracted from the internet)
@version : 1.0
LAST MODIFIED : 18/09/2021 Simplified and commented
======================================================================
*/
/*====================================================================*/
/* COMPILER DIRECTIVES AND INCLUDES */
/*====================================================================*/
#include <termios.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <locale.h>
#include <sys/ioctl.h>
#include <poll.h>
#include "rterm.h"
#include "keyb.h"
/*====================================================================*/
/* GLOBAL VARIABLES */
/*====================================================================*/
struct winsize max;
static struct termios term, failsafe;
static int peek_character = -1;
/*====================================================================*/
/* FUNCTIONS - CODE */
/*====================================================================*/
/*-------------------------------------*/
/* Initialize new terminal i/o settings*/
/*-------------------------------------*/
void pushTerm()
{
//Save terminal settings in failsafe to be retrived at the end
tcgetattr(0, &failsafe);
}
/*---------------------------*/
/* Reset terminal to failsafe*/
/*---------------------------*/
int resetTerm(void)
{
//tcsetattr(0, TCSANOW, &failsafe);
/* flush and reset */
if (tcsetattr(0, TCSAFLUSH, &failsafe) < 0)
return -1;
return 0;
}
/*--------------------------------------.*/
/* Detect whether a key has been pressed.*/
/*---------------------------------------*/
int kbhit(int timeout_ms)
{
struct pollfd fds = { STDIN_FILENO, POLLIN, 0 };
fcntl(STDIN_FILENO, F_SETFL, O_NONBLOCK);
int ret = poll(&fds, 1, timeout_ms);
fcntl(STDIN_FILENO, F_SETFL, 0);
if (ret > 0) {
return 1;
} else if (ret == 0) {
return 0; // timeout occurred
} else {
return -1; // error occurred
}
}
/*
int kbhit()
{
if(peek_character != -1)
return 1;
tcgetattr(0, &term);
term2.c_lflag &= ~ICANON;
tcsetattr(0, TCSANOW, &term2);
int byteswaiting;
ioctl(0, FIONREAD, &byteswaiting);
tcsetattr(0, TCSANOW, &term);
return byteswaiting > 0;
}
*/
/*----------------------*/
/*Read char with control*/
/*----------------------*/
int readch(void)
{
char ch;
if (peek_character != -1) {
ch = peek_character;
peek_character = -1;
return ch;
}
read(0, &ch, 1);
return ch;
}
void resetch(void)
{
//Clear ch
term.c_cc[VMIN] = 0;
tcsetattr(0, TCSANOW, &term);
peek_character = 0;
}
/*----------------------------------*/
/* Move cursor to specified position*/
/*----------------------------------*/
void gotoxy(int x, int y)
{
printf("%c[%d;%df", 0x1B, y, x);
}
/*---------------------*/
/* Change colour output*/
/*---------------------*/
void outputcolor(int foreground, int background)
{
printf("%c[%d;%dm", 0x1b, foreground, background);
}
/*-----------------------------------------------------*/
/* Change the whole color of the screen by applying CLS*/
/*-----------------------------------------------------*/
void screencol(int x)
{
gotoxy(0, 0);
outputcolor(0, x);
printf("%c[2J", 0x1b);
outputcolor(0, 0);
}
/*-----------------------*/
/* Reset ANSI ATTRIBUTES */
/*-----------------------*/
void resetAnsi(int x)
{
switch (x) {
case 0: //reset all colors and attributes
printf("%c[0m", 0x1b);
break;
case 1: //reset only attributes
printf("%c[20m", 0x1b);
break;
case 2: //reset foreg. colors and not attrib.
printf("%c[39m", 0x1b);
break;
case 3: //reset back. colors and not attrib.
printf("%c[49m", 0x1b);
break;
default:
break;
}
}
/*------------------------*/
/* Get terminal dimensions*/
/*------------------------*/
int get_terminal_dimensions(int *rows, int *columns)
{
ioctl(0, TIOCGWINSZ, &max);
*columns = max.ws_col;
*rows = max.ws_row;
return 0;
}
/*--------------------------*/
/* Ansi function hide cursor*/
/*--------------------------*/
void hidecursor(void)
{
printf("\e[?25l");
}
/*--------------------------*/
/* Ansi function show cursor*/
/*--------------------------*/
void showcursor(void)
{
printf("\e[?25h");
}
/*--------------------------*/
/* Set up terminal */
/*--------------------------*/
//For code simplification purposes
void init_term(void)
{
hidecursor();
pushTerm();
resetch();
//Setup unicode
setlocale(LC_ALL, "");
}
void close_term(void)
{
showcursor();
resetTerm();
outputcolor(F_WHITE, B_BLACK);
screencol(B_BLACK);
resetAnsi(0);
printf("\n");
}