mirror of
https://github.com/dingusdev/dingusppc.git
synced 2024-11-18 22:05:51 +00:00
143 lines
3.2 KiB
C++
143 lines
3.2 KiB
C++
/*
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DingusPPC - The Experimental PowerPC Macintosh emulator
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Copyright (C) 2018-22 divingkatae and maximum
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(theweirdo) spatium
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(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
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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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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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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/** Character I/O backend implementations. */
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#include <devices/serial/chario.h>
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#include <loguru.hpp>
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#include <cinttypes>
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#include <memory>
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bool CharIoNull::rcv_char_available()
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{
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return false;
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}
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int CharIoNull::xmit_char(uint8_t c)
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{
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return 0;
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}
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int CharIoNull::rcv_char(uint8_t *c)
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{
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*c = 0xFF;
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return 0;
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}
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//======================== STDIO character I/O backend ========================
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#ifndef _WIN32
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#include<signal.h>
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#include <stdio.h>
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#include <termios.h>
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#include <unistd.h>
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struct sigaction old_act, new_act;
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struct termios orig_termios;
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void mysig_handler(int signum)
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{
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// restore original terminal state
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tcsetattr(STDIN_FILENO, TCSANOW, &orig_termios);
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// restore original signal handler for SIGINT
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signal(SIGINT, old_act.sa_handler);
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LOG_F(INFO, "Old terminal state restored, SIG#=%d", signum);
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// re-post signal
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raise(signum);
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}
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int CharIoStdin::rcv_enable()
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{
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if (this->stdio_inited)
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return 0;
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// save original terminal state
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tcgetattr(STDIN_FILENO, &orig_termios);
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struct termios new_termios = orig_termios;
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new_termios.c_cflag &= ~(CSIZE | PARENB);
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new_termios.c_cflag |= CS8;
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new_termios.c_lflag &= ~(ECHO | ICANON | ISIG);
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new_termios.c_iflag &= ~(ICRNL);
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tcsetattr(STDIN_FILENO, TCSANOW, &new_termios);
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// save original signal handler for SIGINT
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// then redirect SIGINT to new handler
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memset(&new_act, 0, sizeof(new_act));
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new_act.sa_handler = mysig_handler;
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sigaction(SIGINT, &new_act, &old_act);
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this->stdio_inited = true;
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return 0;
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}
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void CharIoStdin::rcv_disable()
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{
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if (!this->stdio_inited)
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return;
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// restore original terminal state
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tcsetattr(STDIN_FILENO, TCSANOW, &orig_termios);
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// restore original signal handler for SIGINT
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signal(SIGINT, old_act.sa_handler);
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this->stdio_inited = false;
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}
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bool CharIoStdin::rcv_char_available()
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{
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fd_set readfds;
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FD_ZERO(&readfds);
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FD_SET(STDIN_FILENO, &readfds);
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fd_set savefds = readfds;
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struct timeval timeout;
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timeout.tv_sec = 0;
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timeout.tv_usec = 0;
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int chr;
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int sel_rv = select(1, &readfds, NULL, NULL, &timeout);
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return sel_rv > 0;
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}
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int CharIoStdin::xmit_char(uint8_t c)
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{
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write(STDOUT_FILENO, &c, 1);
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return 0;
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}
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int CharIoStdin::rcv_char(uint8_t *c)
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{
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read(STDIN_FILENO, c, 1);
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return 0;
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}
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#endif // _WIN32
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