mirror of
https://github.com/dingusdev/dingusppc.git
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481 lines
12 KiB
C++
481 lines
12 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 <cstring>
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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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#ifdef _WIN32
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#include <fcntl.h>
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#include <io.h>
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#include <stdio.h>
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#include <windows.h>
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HANDLE hInput = GetStdHandle(STD_INPUT_HANDLE);
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HANDLE hOutput = GetStdHandle(STD_OUTPUT_HANDLE);
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DWORD old_in_mode, old_out_mode;
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int old_stdin_trans_mode;
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void CharIoStdin::mysig_handler(int signum) {
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SetStdHandle(signum, hInput);
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SetStdHandle(signum, hOutput);
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}
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int CharIoStdin::rcv_enable() {
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if (this->stdio_inited)
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return 0;
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GetConsoleMode(hInput, &old_in_mode);
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GetConsoleMode(hOutput, &old_out_mode);
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DWORD new_in_mode = old_in_mode;
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new_in_mode &= ~ENABLE_ECHO_INPUT;
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new_in_mode &= ~ENABLE_LINE_INPUT;
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new_in_mode &= ~ENABLE_PROCESSED_INPUT;
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new_in_mode |= ENABLE_EXTENDED_FLAGS;
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new_in_mode |= ENABLE_INSERT_MODE;
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new_in_mode |= ENABLE_VIRTUAL_TERMINAL_INPUT;
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SetConsoleMode(hInput, new_in_mode);
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SetConsoleMode(hOutput, old_out_mode | ENABLE_VIRTUAL_TERMINAL_PROCESSING);
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// disable automatic CRLF translation
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old_stdin_trans_mode = _setmode(_fileno(stdin), _O_BINARY);
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this->stdio_inited = true;
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LOG_F(INFO, "Winterm: receiver initialized");
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return 0;
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}
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void CharIoStdin::rcv_disable() {
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if (!this->stdio_inited)
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return;
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// restore original console mode
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SetConsoleMode(hInput, old_in_mode);
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SetConsoleMode(hOutput, old_out_mode);
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// restore original translation mode
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_setmode(_fileno(stdin), old_stdin_trans_mode);
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this->stdio_inited = false;
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LOG_F(INFO, "Winterm: receiver disabled");
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}
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bool CharIoStdin::rcv_char_available() {
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DWORD events;
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INPUT_RECORD buffer;
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PeekConsoleInput(hInput, &buffer, 1, &events);
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return !!(events > 0);
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}
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int CharIoStdin::xmit_char(uint8_t c) {
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_write(_fileno(stdout), &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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_read(_fileno(stdin), c, 1);
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return 0;
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}
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#else // non-Windows OS (Linux, mac OS etc.)
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#include <stdio.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/select.h>
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#include <unistd.h>
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static struct sigaction old_act_sigint, new_act_sigint;
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static struct sigaction old_act_sigterm, new_act_sigterm;
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static struct termios orig_termios;
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void CharIoStdin::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_sigint.sa_handler);
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signal(SIGTERM, old_act_sigterm.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_sigint, 0, sizeof(new_act_sigint));
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new_act_sigint.sa_handler = mysig_handler;
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sigaction(SIGINT, &new_act_sigint, &old_act_sigint);
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// save original signal handler for SIGTERM
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// then redirect SIGTERM to new handler
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memset(&new_act_sigterm, 0, sizeof(new_act_sigterm));
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new_act_sigterm.sa_handler = mysig_handler;
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sigaction(SIGTERM, &new_act_sigterm, &old_act_sigterm);
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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_sigint.sa_handler);
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// restore original signal handler for SIGTERM
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signal(SIGTERM, old_act_sigterm.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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static int consecutivechars = 0;
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if (consecutivechars >= 15) {
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consecutivechars++;
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if (consecutivechars >= 400)
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consecutivechars = 0;
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return 0;
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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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struct timeval timeout;
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timeout.tv_sec = 0;
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timeout.tv_usec = 0;
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int sel_rv = select(1, &readfds, NULL, NULL, &timeout);
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if (sel_rv > 0)
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consecutivechars++;
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else
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consecutivechars = 0;
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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
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//======================== SOCKET character I/O backend ========================
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#ifdef _WIN32
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#else // non-Windows OS (Linux, mac OS etc.)
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <sys/errno.h>
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CharIoSocket::CharIoSocket()
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{
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int rc;
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path = "dingussocket";
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do {
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rc = unlink(path);
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if (rc == 0) {
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LOG_F(INFO, "socket unlinked %s", path);
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}
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else if (errno != ENOENT) {
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LOG_F(INFO, "socket unlink err: %s", strerror(errno));
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break;
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}
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sockaddr_un address;
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memset(&address, 0, sizeof(address));
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address.sun_family = AF_UNIX;
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strcpy(address.sun_path, path);
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sockfd = socket(AF_UNIX, SOCK_STREAM, 0);
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if (sockfd == -1) {
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LOG_F(INFO, "socket create err: %s", strerror(errno));
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break;
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}
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rc = bind(sockfd, (sockaddr*)(&address), sizeof(address));
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if (rc == -1) {
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LOG_F(INFO, "socket bind err: %s", strerror(errno));
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close(sockfd);
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sockfd = -1;
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break;
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}
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rc = listen(sockfd, 100);
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if (rc == -1) {
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LOG_F(INFO, "socket listen err: %s", strerror(errno));
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close(sockfd);
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sockfd = -1;
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break;
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}
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LOG_F(INFO, "socket listen %d", sockfd);
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} while (0);
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};
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CharIoSocket::~CharIoSocket() {
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unlink(path);
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if (errno != ENOENT) {
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LOG_F(INFO, "socket unlink err: %s", strerror(errno));
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}
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if (sockfd != -1) {
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close(sockfd);
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sockfd = -1;
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}
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}
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int CharIoSocket::rcv_enable()
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{
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if (this->socket_inited)
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return 0;
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this->socket_inited = true;
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return 0;
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}
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void CharIoSocket::rcv_disable()
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{
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if (!this->socket_inited)
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return;
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this->socket_inited = false;
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}
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bool CharIoSocket::rcv_char_available()
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{
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static int consecutivechars = 0;
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if (consecutivechars >= 15) {
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consecutivechars++;
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if (consecutivechars >= 800)
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consecutivechars = 0;
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return 0;
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}
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int sel_rv = 0;
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bool havechars = false;
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fd_set readfds;
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fd_set writefds;
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fd_set errorfds;
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int sockmax = 0;
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if (sockfd != -1) {
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FD_ZERO(&readfds);
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FD_SET(sockfd, &readfds);
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if (sockfd > sockmax) sockmax = sockfd;
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if (acceptfd != -1) {
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FD_SET(acceptfd, &readfds);
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if (acceptfd > sockmax) sockmax = acceptfd;
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}
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writefds = readfds;
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errorfds = 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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sel_rv = select(sockmax + 1, &readfds, &writefds, &errorfds, &timeout);
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if (sel_rv == -1) {
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LOG_F(INFO, "socket select err: %s", strerror(errno));
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}
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}
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if (sel_rv > 0) {
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if (sockfd != -1) {
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if (FD_ISSET(sockfd, &readfds)) {
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uint8_t c;
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int received = (int)recv(sockfd, &c, 1, 0);
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if (received == -1) {
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if (acceptfd == -1) {
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//LOG_F(INFO, "socket sock read (not accepted yet) err: %s", strerror(errno)); // this happens once before accept
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}
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else {
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LOG_F(INFO, "socket sock read err: %s", strerror(errno)); // should never happen
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}
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}
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else if (received == 1) {
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LOG_F(INFO, "socket sock read '%c'", c); // should never happen
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}
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else {
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LOG_F(INFO, "socket sock read %d", received); // should never happen
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}
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if (acceptfd == -1) {
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sockaddr_un acceptfdaddr;
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memset(&acceptfdaddr, 0, sizeof(acceptfdaddr));
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socklen_t len = sizeof(acceptfdaddr);
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acceptfd = accept(sockfd, (struct sockaddr *) &acceptfdaddr, &len);
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if (acceptfd == -1){
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LOG_F(INFO, "socket accept err: %s", strerror(errno));
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}
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else {
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LOG_F(INFO, "socket accept %d", acceptfd);
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}
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}
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} // if read
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if (FD_ISSET(sockfd, &writefds)) {
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LOG_F(INFO, "socket sock write");
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}
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if (FD_ISSET(sockfd, &errorfds)) {
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LOG_F(INFO, "socket sock error");
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}
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} // if sockfd
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if (acceptfd != -1) {
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if (FD_ISSET(acceptfd, &readfds)) {
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// LOG_F(INFO, "socket accept read havechars");
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havechars = true;
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consecutivechars++;
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} // if read
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if (FD_ISSET(acceptfd, &writefds)) {
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// LOG_F(INFO, "socket accept write"); // this is usually always true
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}
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if (FD_ISSET(acceptfd, &errorfds)) {
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LOG_F(INFO, "socket accept error");
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}
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} // if acceptfd
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}
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else
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consecutivechars = 0;
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return havechars;
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}
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int CharIoSocket::xmit_char(uint8_t c)
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{
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if (acceptfd == -1)
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CharIoSocket::rcv_char_available();
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if (acceptfd != -1) {
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int sent = (int)send(acceptfd, &c, 1, 0);
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if (sent == -1) {
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LOG_F(INFO, "socket accept write err: %s", strerror(errno));
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}
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if (sent == 1) {
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// LOG_F(INFO, "socket accept write '%c'", c);
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}
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else {
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LOG_F(INFO, "socket accept write %d", sent);
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}
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}
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return 0;
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}
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int CharIoSocket::rcv_char(uint8_t *c)
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{
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if (acceptfd == -1)
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CharIoSocket::rcv_char_available();
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if (acceptfd != -1) {
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int received = (int)recv(acceptfd, c, 1, 0);
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if (received == -1) {
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LOG_F(INFO, "socket accept read err: %s", strerror(errno));
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}
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else if (received == 1) {
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// LOG_F(INFO, "socket accept read '%c'", c ? *c : 0);
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}
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else {
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LOG_F(INFO, "socket accept read %d", received);
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}
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}
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return 0;
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}
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#endif
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