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Disk ARchive
2.5.15
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 | |
Public Member Functions inherited from libdar::generic_file | |
| generic_file (gf_mode m) | |
| main constructor | |
| generic_file (const generic_file &ref) | |
| copy constructor | |
| virtual | ~generic_file () throw (Ebug) |
| virtual destructor, this let inherited destructor to be called even from a generic_file pointer to an inherited class | |
| void | terminate () const |
| destructor-like call, except that it is allowed to throw exceptions | |
| const generic_file & | operator= (const generic_file &ref) |
| assignment operator | |
| gf_mode | get_mode () const |
| retreive the openning mode for this object | |
| virtual void | read_ahead (const infinint &amount) |
| void | ignore_read_ahead (bool mode) |
| U_I | read (char *a, U_I size) |
| read data from the generic_file More... | |
| void | write (const char *a, U_I size) |
| write data to the generic_file More... | |
| void | write (const std::string &arg) |
| write a string to the generic_file More... | |
| S_I | read_back (char &a) |
| skip back one char, read on char and skip back one char | |
| S_I | read_forward (char &a) |
| read one char | |
| virtual void | copy_to (generic_file &ref) |
| copy all data from current position to the object in argument | |
| virtual void | copy_to (generic_file &ref, const infinint &crc_size, crc *&value) |
| copy all data from the current position to the object in argument and computes a CRC value of the transmitted data More... | |
| U_32 | copy_to (generic_file &ref, U_32 size) |
| small copy (up to 4GB) with CRC calculation | |
| infinint | copy_to (generic_file &ref, infinint size) |
| copy the given amount to the object in argument | |
| bool | diff (generic_file &f, const infinint &me_read_ahead, const infinint &you_read_ahead, const infinint &crc_size, crc *&value) |
| compares the contents with the object in argument More... | |
| bool | diff (generic_file &f, const infinint &me_read_ahead, const infinint &you_read_ahead, const infinint &crc_size, crc *&value, infinint &err_offset) |
| void | reset_crc (const infinint &width) |
| reset CRC on read or writen data More... | |
| bool | crc_status () const |
| to known whether CRC calculation is activated or not | |
| crc * | get_crc () |
| get CRC of the transfered date since last reset More... | |
| void | sync_write () |
| write any pending data | |
| void | flush_read () |
| be ready to read at current position, reseting all pending data for reading, cached and in compression engine for example | |
Public Member Functions inherited from libdar::on_pool | |
| void * | operator new (size_t n_byte) |
| void * | operator new (size_t n_byte, const std::nothrow_t ¬hrow_value) |
| void * | operator new[] (size_t n_byte) |
| void * | operator new[] (size_t n_byte, const std::nothrow_t ¬hrow_value) |
| void * | operator new (size_t n_byte, memory_pool *p) |
| void * | operator new[] (size_t n_byte, memory_pool *p) |
| void | operator delete (void *ptr, memory_pool *p) |
| this operator is called by the compiler if an exception is throw from the constructor of the allocated object | |
| void | operator delete[] (void *ptr, memory_pool *p) |
| this operator is called by the compiler if an exception is throw from the constructor of the allocated objects | |
| void | operator delete (void *ptr) |
| this is the usual delete operator, modified to handle allocated objects allocated on a memory pool or not | |
| void | operator delete[] (void *ptr) |
| this is the usual delete[] operator, modified to handle allocated objects allocated on a memory pool or not | |
Protected Member Functions | |
| void | inherited_read_ahead (const infinint &amount) |
| U_I | inherited_read (char *a, U_I size) |
| implementation of read() operation More... | |
| void | inherited_write (const char *a, U_I size) |
| implementation of the write() operation More... | |
| void | inherited_sync_write () |
| write down any pending data More... | |
| void | inherited_flush_read () |
| void | inherited_terminate () |
| destructor-like call, except that it is allowed to throw exceptions More... | |
Protected Member Functions inherited from libdar::generic_file | |
| void | set_mode (gf_mode x) |
| bool | is_terminated () const |
Protected Member Functions inherited from libdar::on_pool | |
| memory_pool * | get_pool () const |
| template<class T > | |
| void | meta_new (T *&ptr, size_t num) |
| template<class T > | |
| void | meta_delete (T *ptr) |
Additional Inherited Members | |
Public Types inherited from libdar::generic_file | |
| enum | skippability { skip_backward, skip_forward } |
compression class for gzip and bzip2 algorithms
Definition at line 67 of file compressor.hpp.
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inlineprotectedvirtual |
reset internal engine, flush caches in order to read the data at current position
Implements libdar::generic_file.
Definition at line 97 of file compressor.hpp.
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inlineprotectedvirtual |
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 94 of file compressor.hpp.
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inlineprotectedvirtual |
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 93 of file compressor.hpp.
References libdar::generic_file::read_ahead().
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inlineprotectedvirtual |
write down any pending data
Implements libdar::generic_file.
Definition at line 96 of file compressor.hpp.
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inlineprotectedvirtual |
destructor-like call, except that it is allowed to throw exceptions
Implements libdar::generic_file.
Definition at line 98 of file compressor.hpp.
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inlineprotectedvirtual |
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 95 of file compressor.hpp.
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inlinevirtual |
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 87 of file compressor.hpp.
References libdar::generic_file::skip().
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inlinevirtual |
whether the implementation is able to skip
Implements libdar::generic_file.
Definition at line 86 of file compressor.hpp.
References libdar::generic_file::skippable().
1.8.14