join::utf8::details Namespace Reference

Classes
struct	OrderTable
	rank of UTF-8 bytes in UTF-16 code unit order. More...
struct	SequenceTable
	UTF-8 well-formed multibyte sequences indexed by lead byte. More...

Functions
uint32_t	sequenceLength (const uint8_t *cur, const uint8_t *end) noexcept
	get the length of a multibyte sequence.
int	validateMixed (const uint8_t *cur, const uint8_t *end) noexcept
	validate UTF-8 input that may contain multibyte sequences.

Variables
constexpr SequenceTable	sequenceLookup {}
	UTF-8 multibyte sequences lookup table.
constexpr OrderTable	orderLookup {}
	UTF-16 code unit order lookup table.
constexpr uint64_t	highBits = 0x8080808080808080ULL
	mask of the high bit of each byte of a 64 bits word.

Function Documentation

sequenceLength()

uint32_t join::utf8::details::sequenceLength ( const uint8_t * cur, const uint8_t * end )

inlinenoexcept

get the length of a multibyte sequence.

Parameters

cur	lead byte of the sequence.
end	end of the input.

Returns

sequence length, 0 if the sequence is ill-formed.

validateMixed()

int join::utf8::details::validateMixed ( const uint8_t * cur, const uint8_t * end )

inlinenoexcept

validate UTF-8 input that may contain multibyte sequences.

Parameters

cur	first byte of the input.
end	end of the input.

Returns

0 on success, -1 otherwise.

Variable Documentation

highBits

uint64_t join::utf8::details::highBits = 0x8080808080808080ULL

constexpr

mask of the high bit of each byte of a 64 bits word.

orderLookup

OrderTable join::utf8::details::orderLookup {}

constexpr

UTF-16 code unit order lookup table.

sequenceLookup

SequenceTable join::utf8::details::sequenceLookup {}

constexpr

UTF-8 multibyte sequences lookup table.