libdar::delta_sig_block_size Struct Reference

defines how to calculate delta signature block size based of file size to delta sign More...

#include <delta_sig_block_size.hpp>

Public Types
enum	fs_function_t {   fixed , linear , log2 , root2 ,   root3 , fixed , linear , log2 ,   root2 , root3 }
	defines the function to use to derivate block size from file size More...
enum	fs_function_t {   fixed , linear , log2 , root2 ,   root3 , fixed , linear , log2 ,   root2 , root3 }
	defines the function to use to derivate block size from file size More...

Public Member Functions
	delta_sig_block_size (const delta_sig_block_size &ref)=default
	set the structure to defaults value
	delta_sig_block_size (delta_sig_block_size &&ref) noexcept=default
delta_sig_block_size &	operator= (const delta_sig_block_size &ref)=default
delta_sig_block_size &	operator= (delta_sig_block_size &&ref) noexcept=default
bool	operator== (const delta_sig_block_size &ref) const
void	reset ()
	reset to default value
bool	equals_default ()
	whether structure has default values
void	check () const
	check the sanity of the provided values
U_I	calculate (const infinint &filesize) const
	calculate the value of the block size given the file size
	delta_sig_block_size (const delta_sig_block_size &ref)=default
	set the structure to defaults value
	delta_sig_block_size (delta_sig_block_size &&ref) noexcept=default
delta_sig_block_size &	operator= (const delta_sig_block_size &ref)=default
delta_sig_block_size &	operator= (delta_sig_block_size &&ref) noexcept=default
bool	operator== (const delta_sig_block_size &ref) const
void	reset ()
	reset to default value
bool	equals_default ()
	whether structure has default values
void	check () const
	check the sanity of the provided values
U_I	calculate (const infinint &filesize) const
	calculate the value of the block size given the file size

Public Attributes
fs_function_t	fs_function
	the function to use to calculate the signature block len
infinint	multiplier
	function dependently used multiplier
infinint	divisor
	function dependently used divisor
U_I	min_block_len
	calculated block len will never be lower than that
U_I	max_block_len
	calculated block len will never be higer than that except if this field is set to zero (disabling this ceiling check)

Detailed Description

defines how to calculate delta signature block size based of file size to delta sign

Note

the global formula is block_size = multiplicator/divisor*fs_function(filesize)

of course, divisor cannot be null

Definition at line 49 of file dar64-2.8.3-win64/include/dar/delta_sig_block_size.hpp.

Member Enumeration Documentation

fs_function_t [1/2]

enum libdar::delta_sig_block_size::fs_function_t

defines the function to use to derivate block size from file size

Enumerator
fixed	block size is independant from file size
linear	block size if proportionnal to file size
log2	block size is proportional to log2(file size)
root2	block size is proportional to the square root of file size
root3	block size if proportional to the cube root of the file size
fixed	block size is independant from file size
linear	block size if proportionnal to file size
log2	block size is proportional to log2(file size)
root2	block size is proportional to the square root of file size
root3	block size if proportional to the cube root of the file size

Definition at line 52 of file dar64-2.8.3-win64/include/dar/delta_sig_block_size.hpp.

fs_function_t [2/2]

enum libdar::delta_sig_block_size::fs_function_t

defines the function to use to derivate block size from file size

Enumerator
fixed	block size is independant from file size
linear	block size if proportionnal to file size
log2	block size is proportional to log2(file size)
root2	block size is proportional to the square root of file size
root3	block size if proportional to the cube root of the file size
fixed	block size is independant from file size
linear	block size if proportionnal to file size
log2	block size is proportional to log2(file size)
root2	block size is proportional to the square root of file size
root3	block size if proportional to the cube root of the file size

Definition at line 52 of file src/libdar/delta_sig_block_size.hpp.

Constructor & Destructor Documentation

delta_sig_block_size() [1/2]

libdar::delta_sig_block_size::delta_sig_block_size ( )

inline

Definition at line 71 of file dar64-2.8.3-win64/include/dar/delta_sig_block_size.hpp.

delta_sig_block_size() [2/2]

libdar::delta_sig_block_size::delta_sig_block_size ( )

inline

Definition at line 71 of file src/libdar/delta_sig_block_size.hpp.

Member Function Documentation

calculate() [1/2]

U_I libdar::delta_sig_block_size::calculate

(

const infinint &

filesize

)

const

calculate the value of the block size given the file size

Parameters

[in]

filesize

is the size of the file which delta signature to be calculated

Returns

the block len to use for delta signature

calculate() [2/2]

U_I libdar::delta_sig_block_size::calculate

(

const infinint &

filesize

)

const

calculate the value of the block size given the file size

Parameters

[in]

filesize

is the size of the file which delta signature to be calculated

Returns

the block len to use for delta signature

equals_default() [1/2]

bool libdar::delta_sig_block_size::equals_default ( )

inline

whether structure has default values

Definition at line 84 of file dar64-2.8.3-win64/include/dar/delta_sig_block_size.hpp.

equals_default() [2/2]

bool libdar::delta_sig_block_size::equals_default ( )

inline

whether structure has default values

Definition at line 84 of file src/libdar/delta_sig_block_size.hpp.

Member Data Documentation

divisor

infinint libdar::delta_sig_block_size::divisor

function dependently used divisor

Definition at line 65 of file dar64-2.8.3-win64/include/dar/delta_sig_block_size.hpp.

fs_function

fs_function_t libdar::delta_sig_block_size::fs_function

the function to use to calculate the signature block len

Definition at line 63 of file dar64-2.8.3-win64/include/dar/delta_sig_block_size.hpp.

max_block_len

U_I libdar::delta_sig_block_size::max_block_len

calculated block len will never be higer than that except if this field is set to zero (disabling this ceiling check)

Definition at line 67 of file dar64-2.8.3-win64/include/dar/delta_sig_block_size.hpp.

min_block_len

U_I libdar::delta_sig_block_size::min_block_len

calculated block len will never be lower than that

Definition at line 66 of file dar64-2.8.3-win64/include/dar/delta_sig_block_size.hpp.

multiplier

infinint libdar::delta_sig_block_size::multiplier

function dependently used multiplier

Definition at line 64 of file dar64-2.8.3-win64/include/dar/delta_sig_block_size.hpp.

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The documentation for this struct was generated from the following files:

• dar64-2.8.3-win64/include/dar/delta_sig_block_size.hpp
• src/libdar/delta_sig_block_size.hpp