profuse/BlockDevice.cpp

176 lines
3.3 KiB
C++

#include "BlockDevice.h"
#include "Exception.h"
#include "MappedFile.h"
#include <cerrno>
#include <cstdlib>
#include <cstring>
#include <unistd.h>
#include <fcntl.h>
#include <sys/mman.h>
using namespace ProFUSE;
BlockDevice::~BlockDevice()
{
}
BlockDevice::zeroBlock(unsigned block)
{
uint8_t bp[512];
std::memset(bp, 0, 512);
write(block, bp);
}
#pragma mark DiskImage
DiskImage::DiskImage(const char *name, bool readOnly) :
_file(NULL)
{
_file = new MappedFile(name, readOnly);
}
DiskImage::DiskImage(MappedFile *file) :
_file(file)
{
}
DiskImage::~DiskImage()
{
delete _file;
}
bool DiskImage::readOnly()
{
#undef __METHOD__
#define __METHOD__ "DiskImage::readOnly"
if (_file) return _file->readOnly();
throw Exception(__METHOD__ ": File not set.");
}
void DiskImage::read(unsigned block, void *bp)
{
#undef __METHOD__
#define __METHOD__ "DiskImage::read"
if (_file) return _file->readBlock(block, bp);
throw Exception(__METHOD__ ": File not set.");
}
void DiskImage::write(unsigned block, const void *bp)
{
#undef __METHOD__
#define __METHOD__ "DiskImage::write"
if (_file) return _file->writeBlock(block, bp);
throw Exception(__METHOD__ ": File not set.");
}
void DiskImage::sync()
{
#undef __METHOD__
#define __METHOD__ "DiskImage::sync"
if (_file) return _file->sync();
throw Exception(__METHOD__ ": File not set.");
}
ProDOSOrderDiskImage::ProDOSOrderDiskImage(const char *name, bool readOnly) :
DiskImage(name, readOnly)
{
Validate(file());
}
ProDOSOrderDiskImage::ProDOSOrderDiskImage(MappedFile *file) :
DiskImage(file)
{
}
ProDOSOrderDiskImage *ProDOSOrderDiskImage::Create(const char *name, size_t blocks)
{
MappedFile *file = new MappedFile(name, blocks * 512);
return new ProDOSOrderDiskImage(file);
}
ProDOSOrderDiskImage *ProDOSOrderDiskImage::Open(MappedFile *file)
{
Validate(file);
return new ProDOSOrderDiskImage(file);
}
void ProDOSOrderDiskImage::Validate(MappedFile *f)
{
#undef __METHOD__
#define __METHOD__ "ProDOSOrderDiskImage::Validate"
if (!f) throw Exception(__METHOD__ ": File not set.");
size_t size = f->fileSize();
if (size % 512)
throw Exception(__METHOD__ ": Invalid file format.");
f->reset();
f->setBlocks(size / 512);
}
DOSOrderDiskImage::DOSOrderDiskImage(const char *name, bool readOnly) :
DiskImage(name, readOnly)
{
Validate(file());
}
DOSOrderDiskImage::DOSOrderDiskImage(MappedFile *file) :
DiskImage(file)
{
}
DOSOrderDiskImage *DOSOrderDiskImage::Create(const char *name, size_t blocks)
{
MappedFile *file = new MappedFile(name, blocks * 512);
file->setDosOrder(true);
return new DOSOrderDiskImage(file);
}
DOSOrderDiskImage *DOSOrderDiskImage::Open(MappedFile *file)
{
Validate(file);
return new DOSOrderDiskImage(file);
}
void DOSOrderDiskImage::Validate(MappedFile *f)
{
#undef __METHOD__
#define __METHOD__ "DOSOrderDiskImage::Validate"
if (!f) throw Exception(__METHOD__ ": File not set.");
size_t size = f->fileSize();
if (size % 512)
throw Exception(__METHOD__ ": Invalid file format.");
f->reset();
f->setDosOrder(true);
f->setBlocks(size / 512);
}