dingusppc/devices/serial/chario.h
2024-03-08 19:27:42 -07:00

108 lines
2.8 KiB
C++

/*
DingusPPC - The Experimental PowerPC Macintosh emulator
Copyright (C) 2018-22 divingkatae and maximum
(theweirdo) spatium
(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
/** Character I/O definitions. */
#ifndef CHAR_IO_H
#define CHAR_IO_H
#include <cinttypes>
#ifdef _WIN32
#else
#include <termios.h>
#include <signal.h>
#endif
enum {
CHARIO_BE_NULL = 0, // NULL backend: swallows everything, receives nothing
CHARIO_BE_STDIO = 1, // STDIO backend: uses STDIN for input and STDOUT for output
CHARIO_BE_SOCKET = 2, // socket backend: uses a socket for input and output
};
/** Interface for character I/O backends. */
class CharIoBackEnd {
public:
CharIoBackEnd() = default;
virtual ~CharIoBackEnd() = default;
virtual int rcv_enable() { return 0; };
virtual void rcv_disable() {};
virtual bool rcv_char_available() = 0;
virtual bool rcv_char_available_now() = 0;
virtual int xmit_char(uint8_t c) = 0;
virtual int rcv_char(uint8_t *c) = 0;
};
/** Null character I/O backend. */
class CharIoNull : public CharIoBackEnd {
public:
CharIoNull() = default;
~CharIoNull() = default;
bool rcv_char_available();
bool rcv_char_available_now();
int xmit_char(uint8_t c);
int rcv_char(uint8_t *c);
};
/** Stdin character I/O backend. */
class CharIoStdin : public CharIoBackEnd {
public:
CharIoStdin() { this->stdio_inited = false; };
~CharIoStdin() = default;
int rcv_enable();
void rcv_disable();
bool rcv_char_available();
bool rcv_char_available_now();
int xmit_char(uint8_t c);
int rcv_char(uint8_t *c);
private:
static void mysig_handler(int signum);
bool stdio_inited;
int consecutivechars = 0;
};
/** Socket character I/O backend. */
class CharIoSocket : public CharIoBackEnd {
public:
CharIoSocket();
~CharIoSocket();
int rcv_enable();
void rcv_disable();
bool rcv_char_available();
bool rcv_char_available_now();
int xmit_char(uint8_t c);
int rcv_char(uint8_t *c);
private:
bool socket_inited = false;
int sockfd = -1;
int acceptfd = -1;
const char* path = 0;
int consecutivechars = 0;
};
#endif // CHAR_IO_H