scrambler is a very weak encryption scheme More...

Public Member Functions
	scrambler (const secu_string &pass, generic_file &hidden_side)
	scrambler (const scrambler &ref)
const scrambler &	operator= (const scrambler &ref)
bool	skip (const infinint &pos)
	skip at the absolute position
bool	skip_to_eof ()
	skip to the end of file
bool	skip_relative (S_I x)
	skip relatively to the current position
infinint	get_position ()
	get the current read/write position
Protected Member Functions
U_I	inherited_read (char *a, U_I size)
	implementation of read() operation
void	inherited_write (const char *a, U_I size)
	implementation of the write() operation
void	inherited_sync_write ()
	write down any pending data
void	inherited_terminate ()
	destructor-like call, except that it is allowed to throw exceptions

Detailed Description

scrambler is a very weak encryption scheme

Definition at line 43 of file scrambler.hpp.

Member Function Documentation

U_I libdar::scrambler::inherited_read	(	char *	a,
		U_I	size
	)		`[protected, virtual]`

implementation of read() operation

Parameters:

[in,out]	a	where to put the data to read
[in]	size	says how much data to read

Note:: read as much byte as requested, up to end of file stays blocked if not enough data is available and EOF not yet met. May return less data than requested only if EOF as been reached. in other worlds, EOF is reached when returned data is stricly less than the requested data Any problem shall be reported by throwing an exception.

void libdar::scrambler::inherited_sync_write ( ) [inline, protected, virtual]

write down any pending data

Note:: this method is called after read/write mode checking from sync_write() public method;

Definition at line 63 of file scrambler.hpp.

void libdar::scrambler::inherited_terminate ( ) [inline, protected, virtual]

destructor-like call, except that it is allowed to throw exceptions

Note:: this method must never be called directly but using terminate() instead, generic_file class manages it to never be called more than once

Definition at line 64 of file scrambler.hpp.

void libdar::scrambler::inherited_write	(	const char *	a,
		U_I	size
	)		`[protected, virtual]`

implementation of the write() operation

Parameters:

[in]	a	what data to write
[in]	size	amount of data to write

Note:: must either write all data or report an error by throwing an exception

bool libdar::scrambler::skip ( const infinint & pos ) [inline, virtual]

skip at the absolute position

Parameters:

[in] pos the offset in byte where next read/write operation must start

Returns:: true if operation was successfull and false if the requested position is not valid (after end of file)

Note:: if requested position is not valid the reading/writing cursor must be set to the closest valid position

Definition at line 52 of file scrambler.hpp.

References skip().

Referenced by skip().

The documentation for this class was generated from the following file: