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sortix--sortix/sortix/mxfs.h

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2011-08-05 08:25:00 -04:00
/******************************************************************************
COPYRIGHT(C) JONAS 'SORTIE' TERMANSEN 2011.
This file is part of Sortix.
Sortix 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.
Sortix 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 Sortix. If not, see <http://www.gnu.org/licenses/>.
mxfs.h
A working file system.
******************************************************************************/
#ifndef SORTIX_MXFS_H
#define SORTIX_MXFS_H
#include "stream.h"
#include "filesystem.h"
namespace Sortix
{
class DevMXFS;
class DevMXFSFile;
class MXFSNode;
class DevMXFSFile : public DevBuffer
{
friend class DevMXFS;
private:
DevMXFSFile* _prevSibling;
DevMXFSFile* _nextSibling;
private:
DevMXFS* _parent;
private:
intmax_t _beginning;
intmax_t _size;
public:
virtual size_t Write(const void* buffer, size_t bufferSize) = 0;
virtual size_t ReadSome(const void* buffer, size_t bufferSize) = 0;
public:
virtual size_t BlockSize() = 0;
virtual intmax_t Size() = 0;
virtual intmax_t Position() = 0;
virtual bool Seek(intmax_t position) = 0;
virtual bool Resize(intmax_t size) = 0;
};
class DevMXFS : public DevFileSystem
{
friend class DevMXFSFile;
public:
DevMXFS();
virtual ~DevMXFS();
public:
virtual int Initialize(MountPoint* mountPoint, const char* commandLine);
private:
MountPoint* _mountPoint;
DevBuffer* _storage;
DevMXFSFile* _children;
MXFSNode* _root;
private:
nat _state;
uint64_t _parsingBlock;
MXFSNode* _parsingLastNode;
MXFSNode* _parsingParent;
private:
volatile int _storageStatus;
intmax_t _blockId;
uint8_t* _block;
intmax_t _fsSize;
private:
uint8_t* GetBlock(intmax_t blockId);
private:
bool ParseHeader();
bool ParseBlocks();
void Failure();
private:
MXFSNode* Search(const char* path);
protected:
virtual void Think();
public:
virtual bool Sync();
public:
virtual Device* Open(const char* path, nat flags, nat permissions, nat* type);
};
}
#endif