WIP: VFS

newvfs.ec

#define DEFAULT_DIR_MODE S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH // 0755

#define BLOCKSIZE       512
#define BLOCKING_FACTOR 20
#define RECORDSIZE      10240

// file type values (1 octet)
#define REGULAR          0
#define NORMAL          '0'
#define HARDLINK        '1'
#define SYMLINK         '2'
#define CHAR            '3'
#define BLOCK           '4'
#define DIRECTORY       '5'
#define FIFO            '6'
#define CONTIGUOUS      '7'

class VFSEntryMeta: struct {
    char original_name[100];                // original filenme; only availible when writing into a tar
    unsigned int begin;                     // location of data in file (including metadata)
	union {
		// Pre-POSIX.1-1988 format
		struct {
			char name[100];             // file name
			char mode[8];               // permissions
			char uid[8];                // user id (octal)
			char gid[8];                // group id (octal)
			char size[12];              // size (octal)
			char mtime[12];             // modification time (octal)
			char check[8];              // sum of unsigned characters in block, with spaces in the check field while calculation is done (octal)
			char link;                  // link indicator
			char link_name[100];        // name of linked file
		};

		// UStar format (POSIX IEEE P1003.1)
		struct {
			char old[156];              // first 156 octets of Pre-POSIX.1-1988 format
			char type;                  // file type
			char also_link_name[100];   // name of linked file
			char ustar[8];              // ustar\000
			char owner[32];             // user name (string)
			char group[32];             // group name (string)
			char major[8];              // device major number
			char minor[8];              // device minor number
			char prefix[155];
		};
		
		char block[512];                    // raw memory (500 octets of actual data, padded to 1 block)
	};
};

class VFSEntry: struct {
	
}

class VFSFile: VFSEntry {
	
}


class VFSDirectory: VFSEntry {
	
}

class VFS {
	bool read() {
		return true;
	}
	bool write(Array<VFSFile> contents) {
		return true;
	}
	
	~VFS();
	
	bool list(Array<VFSFile> contents) {
		return true;
	}
	
	bool extract(const String location, const String pathname) {
		return true;
	}
	
	bool update(const String filename, void* buffer) {
		return true;
	}
	
	bool remove(const String filename) {
		return true;
	}
	
	bool find(const char * filename) {
		return true;
	}
	
	bool readEntry(VFSEntry entry, const char * filename) {
		return true;
	}
	
	bool listEntry(Array<VFSEntry> items, const string pathname) {
		return true;
	}
	
	bool writeEntries(Array<VFSEntry> items, int * offset) {
		return true;
	}
	
	bool writeCatalog(const char verbosity) {
		return true;
	}
	
	bool validate() {
		return true;
	}
}