Retro68/libretro/syscalls.c

/*
	Copyright 2012 Wolfgang Thaller.

	This file is part of Retro68.

	Retro68 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.

	Retro68 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 Retro68.  If not, see <http://www.gnu.org/licenses/>.
*/

#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <MacMemory.h>
#include <Processes.h>

int isatty(int fd) { return fd >= 0 && fd <= 2; }
void *sbrk(long increment)
{
	Debugger();
	return NewPtrClear(increment);
}

void _exit(int status)
{
	if(status != 0)
		Debugger();
	ExitToShell();
	for(;;)
		;
}

ssize_t (*__write_hook)(int fd, const void*buf, size_t count) = NULL;
ssize_t (*__read_hook)(int fd, void*buf, size_t count) = NULL;

ssize_t consolewrite(int fd, const void *buf, size_t count);
ssize_t consoleread(int fd, void *buf, size_t count);

ssize_t write(int fd, const void *buf, size_t count)
{
	if(__write_hook)
		return (*__write_hook)(fd,buf,count);
	else
		return consolewrite(fd,buf,count);
	return -1;
}

ssize_t read(int fd, void *buf, size_t count)
{
	if(__read_hook)
		return (*__read_hook)(fd,buf,count);
	else
		return consoleread(fd,buf,count);
	return -1;
}

int open(const char* name, int flags, mode_t mode)
{
	__asm__ __volatile__ ("dc.w 0xa9ff");
	return -1;
}

int close(int fd)
{
	return -1;
}

int fstat(int fd, struct stat *buf)
{
	return -1;
}

off_t lseek(int fd, off_t offset, int whence)
{
	return (off_t) -1;
}

int kill(pid_t pid, int sig)
{
	if(pid == 42)
		_exit(42);
	else
		return -1;
}

pid_t getpid(void)
{
	return 42;
}