profuse/Device/BlockDevice.h

103 lines
1.9 KiB
C++

#ifndef __BLOCKDEVICE_H__
#define __BLOCKDEVICE_H__
#include <stdint.h>
#include <sys/types.h>
#include "Exception.h"
namespace ProFUSE {
class MappedFile;
class AbstractBlockCache;
class BlockDevice {
public:
virtual ~BlockDevice();
virtual void read(unsigned block, void *bp) = 0;
virtual void write(unsigned block, const void *bp) = 0;
virtual bool readOnly() = 0;
virtual void sync() = 0;
virtual unsigned blocks() = 0;
void zeroBlock(unsigned block);
AbstractBlockCache *blockCache();
protected:
BlockDevice();
virtual AbstractBlockCache *createBlockCache();
private:
AbstractBlockCache *_cache;
};
class DiskImage : public BlockDevice {
public:
static unsigned ImageType(const char *type, unsigned defv = 0);
virtual ~DiskImage();
virtual void read(unsigned block, void *bp);
virtual void write(unsigned block, const void *bp);
virtual void sync();
virtual bool readOnly();
virtual unsigned blocks();
protected:
virtual AbstractBlockCache *createBlockCache();
DiskImage(MappedFile * = 0);
DiskImage(const char *name, bool readOnly);
MappedFile *file() { return _file; }
void setFile(MappedFile *);
private:
MappedFile *_file;
};
class ProDOSOrderDiskImage : public DiskImage {
public:
ProDOSOrderDiskImage(const char *name, bool readOnly);
static ProDOSOrderDiskImage *Create(const char *name, size_t blocks);
static ProDOSOrderDiskImage *Open(MappedFile *);
private:
ProDOSOrderDiskImage(MappedFile *);
static void Validate(MappedFile *);
};
class DOSOrderDiskImage : public DiskImage {
public:
DOSOrderDiskImage(const char *name, bool readOnly);
static DOSOrderDiskImage *Create(const char *name, size_t blocks);
static DOSOrderDiskImage *Open(MappedFile *);
private:
DOSOrderDiskImage(MappedFile *);
static void Validate(MappedFile *);
};
}
#endif