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2.5.2
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scrambler is a very weak encryption scheme More...
#include <scrambler.hpp>
Inherits libdar::generic_file.
Public Member Functions | |
scrambler (const secu_string &pass, generic_file &hidden_side) | |
scrambler (const scrambler &ref) | |
const scrambler & | operator= (const scrambler &ref) |
bool | skippable (skippability direction, const infinint &amount) |
bool | skip (const infinint &pos) |
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 () const |
get the current read/write position | |
Protected Member Functions | |
void | inherited_read_ahead (const infinint &amount) |
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_flush_read () |
void | inherited_terminate () |
destructor-like call, except that it is allowed to throw exceptions |
scrambler is a very weak encryption scheme
Definition at line 43 of file scrambler.hpp.
void libdar::scrambler::inherited_flush_read | ( | ) | [inline, protected, virtual] |
reset internal engine, flush caches in order to read the data at current position
Implements libdar::generic_file.
Definition at line 63 of file scrambler.hpp.
U_I libdar::scrambler::inherited_read | ( | char * | a, |
U_I | size | ||
) | [protected, virtual] |
implementation of read() operation
[in,out] | a | where to put the data to read |
[in] | size | says how much data to read |
Implements libdar::generic_file.
void libdar::scrambler::inherited_read_ahead | ( | const infinint & | amount | ) | [inline, protected, virtual] |
tells the object that several calls to read() will follow to probably obtain at least the given amount of data
[in] | amount | is the maximum expected amount of data that is known to be read |
Implements libdar::generic_file.
Definition at line 59 of file scrambler.hpp.
References libdar::generic_file::read_ahead().
void libdar::scrambler::inherited_sync_write | ( | ) | [inline, protected, virtual] |
write down any pending data
Implements libdar::generic_file.
Definition at line 62 of file scrambler.hpp.
void libdar::scrambler::inherited_terminate | ( | ) | [inline, protected, virtual] |
destructor-like call, except that it is allowed to throw exceptions
Implements libdar::generic_file.
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
[in] | a | what data to write |
[in] | size | amount of data to write |
Implements libdar::generic_file.
bool libdar::scrambler::skip | ( | const infinint & | pos | ) | [inline, virtual] |
skip at the absolute position
[in] | pos | the offset in byte where next read/write operation must start |
Implements libdar::generic_file.
Definition at line 53 of file scrambler.hpp.
References skip().
Referenced by skip().
bool libdar::scrambler::skippable | ( | skippability | direction, |
const infinint & | amount | ||
) | [inline, virtual] |
whether the implementation is able to skip
Implements libdar::generic_file.
Definition at line 52 of file scrambler.hpp.
References skippable().
Referenced by skippable().