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Disk ARchive
2.5.2
Full featured and portable backup and archiving tool
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compression class for gzip and bzip2 algorithms More...
#include <compressor.hpp>
Inherits libdar::generic_file.
Public Member Functions | |
compressor (compression algo, generic_file &compressed_side, U_I compression_level=9) | |
compressor (compression algo, generic_file *compressed_side, U_I compression_level=9) | |
compression | get_algo () const |
void | suspend_compression () |
void | resume_compression () |
bool | is_compression_suspended () const |
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 |
compression class for gzip and bzip2 algorithms
Definition at line 61 of file compressor.hpp.
void libdar::compressor::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 91 of file compressor.hpp.
U_I libdar::compressor::inherited_read | ( | char * | a, |
U_I | size | ||
) | [inline, 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.
Definition at line 88 of file compressor.hpp.
void libdar::compressor::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 87 of file compressor.hpp.
References libdar::generic_file::read_ahead().
void libdar::compressor::inherited_sync_write | ( | ) | [inline, protected, virtual] |
write down any pending data
Implements libdar::generic_file.
Definition at line 90 of file compressor.hpp.
void libdar::compressor::inherited_terminate | ( | ) | [inline, protected, virtual] |
destructor-like call, except that it is allowed to throw exceptions
Implements libdar::generic_file.
Definition at line 92 of file compressor.hpp.
void libdar::compressor::inherited_write | ( | const char * | a, |
U_I | size | ||
) | [inline, protected, virtual] |
implementation of the write() operation
[in] | a | what data to write |
[in] | size | amount of data to write |
Implements libdar::generic_file.
Definition at line 89 of file compressor.hpp.
bool libdar::compressor::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 81 of file compressor.hpp.
References libdar::generic_file::skip().
bool libdar::compressor::skippable | ( | skippability | direction, |
const infinint & | amount | ||
) | [inline, virtual] |
whether the implementation is able to skip
Implements libdar::generic_file.
Definition at line 80 of file compressor.hpp.
References libdar::generic_file::skippable().