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>

Collaboration diagram for libdar::delta_sig_block_size:

Public Types
enum	fs_function_t {   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 More...
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 More...

Public Attributes
fs_function_t	fs_function
	the function to use to calculate the signature block len More...
infinint	multiplier
	function dependently used multiplier More...
infinint	divisor
	function dependently used divisor More...
U_I	min_block_len
	calculated block len will never be lower than that More...
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) More...

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 delta_sig_block_size.hpp.

Member Enumeration Documentation

fs_function_t

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

Definition at line 52 of file delta_sig_block_size.hpp.

Constructor & Destructor Documentation

delta_sig_block_size()

libdar::delta_sig_block_size::delta_sig_block_size ( )

inline

Definition at line 71 of file delta_sig_block_size.hpp.

Member Function Documentation

calculate()

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()

bool libdar::delta_sig_block_size::equals_default ( )

inline

whether structure has default values

Definition at line 84 of file 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 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 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 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 delta_sig_block_size.hpp.

multiplier

infinint libdar::delta_sig_block_size::multiplier

function dependently used multiplier

Definition at line 64 of file delta_sig_block_size.hpp.

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

• delta_sig_block_size.hpp