/*
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* Copyright (C) 2019 Hertz Wang 1989wanghang@163.com
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see http://www.gnu.org/licenses
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*
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* Any non-GPL usage of this software or parts of this software is strictly
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* forbidden.
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*
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*/
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#include <assert.h>
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#include <fcntl.h>
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#include <poll.h>
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#include <stdio.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/uio.h>
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#include <termios.h>
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#include <unistd.h>
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static struct termios oldtty;
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static int restore_tty = 0;
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// termios.h
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int read_key() {
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unsigned char ch;
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int n = 1;
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struct timeval tv;
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fd_set rfds;
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FD_ZERO(&rfds);
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FD_SET(0, &rfds);
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tv.tv_sec = 0;
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tv.tv_usec = 0;
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n = select(1, &rfds, NULL, NULL, &tv);
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if (n > 0) {
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n = read(0, &ch, 1);
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if (n == 1)
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return ch;
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return n;
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}
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return -1;
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}
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void term_init() {
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struct termios tty;
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if (tcgetattr(0, &tty) == 0) {
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oldtty = tty;
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restore_tty = 1;
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tty.c_iflag &=
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~(IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL | IXON);
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tty.c_oflag |= OPOST;
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tty.c_lflag &= ~(ECHO | ECHONL | ICANON | IEXTEN);
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tty.c_cflag &= ~(CSIZE | PARENB);
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tty.c_cflag |= CS8;
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tty.c_cc[VMIN] = 1;
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tty.c_cc[VTIME] = 0;
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tcsetattr(0, TCSANOW, &tty);
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}
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}
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void term_deinit() {
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if (restore_tty)
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tcsetattr(0, TCSANOW, &oldtty);
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}
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