mpw/mpw/mpw_io.cpp
Kelvin Sherlock fc04a2b2cb add license
2013-07-30 01:06:19 -04:00

144 lines
3.4 KiB
C++

/*
* Copyright (c) 2013, Kelvin W Sherlock
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "mpw.h"
#include "mpw_internal.h"
#include <algorithm>
#include <memory>
#include <cerrno>
#include <cstdio>
#include <unistd.h>
#include <cpu/defs.h>
#include <cpu/fmem.h>
#include <cpu/cpuModule.h>
#include <macos/errors.h>
#include <toolbox/os.h>
#include <toolbox/os_internal.h>
namespace MPW
{
void ftrap_read(uint16_t trap)
{
uint32_t d0;
uint32_t sp = cpuGetAReg(7);
uint32_t parm = memoryReadLong(sp + 4);
MPWFile f;
f.flags = memoryReadWord(parm);
f.error = memoryReadWord(parm + 2);
f.device = memoryReadLong(parm + 4);
f.cookie = memoryReadLong(parm + 8);
f.count = memoryReadLong(parm + 12);
f.buffer = memoryReadLong(parm + 16);
Log("%04x Read(%08x)\n", trap, parm);
d0 = 0;
int fd = f.cookie;
ssize_t size;
Log(" read(%04x, %08x, %08x)", fd, f.buffer, f.count);
size = OS::Internal::FDEntry::read(fd, memoryPointer(f.buffer), f.count);
//Log(" -> %ld\n", size);
if (size < 0)
{
//f.count = 0;
f.error = MacOS::ioErr; // ioErr
d0 = errno_to_errno(errno);
}
else
{
f.count -= size;
f.error = 0;
}
// write back...
memoryWriteWord(f.error, parm + 2);
memoryWriteLong(f.count, parm + 12);
cpuSetDReg(0, d0);
}
void ftrap_write(uint16_t trap)
{
uint32_t d0;
uint32_t sp = cpuGetAReg(7);
uint32_t parm = memoryReadLong(sp + 4);
MPWFile f;
f.flags = memoryReadWord(parm);
f.error = memoryReadWord(parm + 2);
f.device = memoryReadLong(parm + 4);
f.cookie = memoryReadLong(parm + 8);
f.count = memoryReadLong(parm + 12);
f.buffer = memoryReadLong(parm + 16);
Log("%04x Write(%08x)\n", trap, parm);
d0 = 0;
int fd = f.cookie;
ssize_t size;
Log(" write(%04x, %08x, %08x)\n", fd, f.buffer, f.count);
size = OS::Internal::FDEntry::write(fd, memoryPointer(f.buffer), f.count);
if (size < 0)
{
//f.count = 0;
f.error = MacOS::ioErr; // ioErr
d0 = errno_to_errno(errno);
}
else
{
f.count -= size;
f.error = 0;
}
// write back...
memoryWriteWord(f.error, parm + 2);
memoryWriteLong(f.count, parm + 12);
cpuSetDReg(0, d0);
}
}