pabigot::crc::details Namespace Reference

Internal support for pabigot::crc. More...

Data Structures
class	base_crc
	CRC core framework using Rocksoft^tm Model characteristics. More...
struct	uint_size_traits
	Entry-point to identifying unsigned integral types supporting a specific number of bits. More...
struct	uint_size_traits< 1 >
struct	uint_size_traits< 2 >
struct	uint_size_traits< 3 >
struct	uint_size_traits< 4 >
struct	uint_support
	Type and policy traits providing support for operations on B-bit values. More...
struct	uint_traits
	Extend the size-related traits with functionality operating on the specific types. More...

Typedefs
using	uint8_traits = uint_traits< 4 >
	for uint8_t
using	uint16_traits = uint_traits< 3 >
	for uint16_t
using	uint32_traits = uint_traits< 2 >
	for uint32_t
using	uint64_traits = uint_traits< 1 >
	for uint64_t

Functions
template<typename UI >
static constexpr UI	reverse_low_bits (const UI &v, unsigned int bits)
	Reverse bits [0..bits) of v. More...
template<unsigned int B>
constexpr unsigned int	uint_category ()
	Compute the #uint_size_traits category value for a required bit length. More...
template<typename CRC , size_t... n>
constexpr auto	lookup_table (std::index_sequence< n... >)
	Use a template parameter pack to fill out a 256-element std::initializer_list for a std::array.
template<typename CRC >
constexpr auto	lookup_table ()
	Return a std::array for the CRC byte-indexed table. More...

Detailed Description

Internal support for pabigot::crc.

Applications should not need to use any of these.

Function Documentation

lookup_table()

template<typename CRC >

constexpr auto pabigot::crc::details::lookup_table ( )

constexpr

Return a std::array for the CRC byte-indexed table.

Template Parameters

A	fully instantiated class. a std::array with 256 elements where element i is the result of invoking crc::lookup_for_byte on i.

reverse_low_bits()

template<typename UI >

static constexpr UI pabigot::crc::details::reverse_low_bits ( const UI &  v, unsigned int  bits  )

staticconstexpr

Reverse bits [0..bits) of v.

Template Parameters

UI	an unsigned integral type

Parameters

v	a value, the low bits bits of which contain data
bits	the number of valid bits within a word of type UI

Returns

the result of reversing the low bits bits of v.

Note

Keep this outside of the traits classes since the same underlying fast_type may be shared for different sizes.

uint_category()

template<unsigned int B>

constexpr unsigned int pabigot::crc::details::uint_category ( )

constexpr

Compute the #uint_size_traits category value for a required bit length.

Template Parameters

B	the number of bits required in an unsigned integer.

Returns

the category value for B