qr Namespace Reference

Classes
struct	Qr
class	QrDelegate
	QR code encoder class. More...

Enumerations
enum	Ecc { L , M , Q , H }
enum	Mode { M_NUMERIC , M_ALPHANUMERIC , M_BYTE , M_KANJI }

Functions
uint8_t	gf_mul (uint8_t a, uint8_t b)
	galois finite field multiplication.
constexpr uint8_t	get_bit_r (uint8_t *arr, int n)
constexpr void	add_bits (uint16_t data, int n, uint8_t *arr, size_t &pos)
constexpr int	alphanumeric (char c)
constexpr bool	is_alphanumeric (const char *str, size_t len)
constexpr bool	is_numeric (const char *str, size_t len)
constexpr bool	is_kanji (const char *str, size_t len)
constexpr void	gf_gen_poly (int degree, uint8_t *poly)
constexpr void	gf_poly_div (uint8_t *dividend, size_t len, uint8_t *divisor, int degree, uint8_t *result)
constexpr Mode	select_mode (const char *str, size_t len)
constexpr int	cci (int ver, Mode mode)

Variables
uint8_t	min_poly = 0b11101
uint8_t	generator = 0b10
constexpr int	ECC_CODEWORDS_PER_BLOCK [4][41]
constexpr int	N_ECC_BLOCKS [4][41]
constexpr int	ALIGN_POS [41][7]

Detailed Description

Note

the QR code is still code 128, it utilizes the same concept of having it's own character set.

Enumeration Type Documentation

Ecc

enum qr::Ecc

Enumerator
L
M
Q
H

Mode

enum qr::Mode

Enumerator
M_NUMERIC
M_ALPHANUMERIC
M_BYTE
M_KANJI

Function Documentation

add_bits()

void qr::add_bits ( uint16_t data, int n, uint8_t * arr, size_t & pos )

constexpr

alphanumeric()

int qr::alphanumeric ( char c )

constexpr

cci()

int qr::cci ( int ver, Mode mode )

constexpr

get_bit_r()

uint8_t qr::get_bit_r ( uint8_t * arr, int n )

constexpr

gf_gen_poly()

void qr::gf_gen_poly ( int degree, uint8_t * poly )

constexpr

gf_mul()

uint8_t qr::gf_mul ( uint8_t a, uint8_t b )

inline

galois finite field multiplication.

gf_poly_div()

void qr::gf_poly_div ( uint8_t * dividend, size_t len, uint8_t * divisor, int degree, uint8_t * result )

constexpr

is_alphanumeric()

bool qr::is_alphanumeric ( const char * str, size_t len )

constexpr

is_kanji()

bool qr::is_kanji ( const char * str, size_t len )

constexpr

is_numeric()

bool qr::is_numeric ( const char * str, size_t len )

constexpr

select_mode()

Mode qr::select_mode ( const char * str, size_t len )

constexpr

Variable Documentation

ALIGN_POS

int qr::ALIGN_POS[41][7]

constexpr

ECC_CODEWORDS_PER_BLOCK

int qr::ECC_CODEWORDS_PER_BLOCK[4][41]

constexpr

Initial value:

= {
    {0,  7,  10, 15, 20, 26, 18, 20, 24, 30, 18, 20, 24, 26, 30, 22, 24, 28, 30, 28, 28,
     28, 28, 30, 30, 26, 28, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30},
    {0,  10, 16, 26, 18, 24, 16, 18, 22, 22, 26, 30, 22, 22, 24, 24, 28, 28, 26, 26, 26,
     26, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28},
    {0,  13, 22, 18, 26, 18, 24, 18, 22, 20, 24, 28, 26, 24, 20, 30, 24, 28, 28, 26, 30,
     28, 30, 30, 30, 30, 28, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30},
    {0,  17, 28, 22, 16, 22, 28, 26, 26, 24, 28, 24, 28, 22, 24, 24, 30, 28, 28, 26, 28,
     30, 24, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30},
}

generator

uint8_t qr::generator = 0b10

min_poly

uint8_t qr::min_poly = 0b11101

inline

N_ECC_BLOCKS

int qr::N_ECC_BLOCKS[4][41]

constexpr

Initial value:

= {
    {0, 1, 1, 1,  1,  1,  2,  2,  2,  2,  4,  4,  4,  4,  4,  6,  6,  6,  6,  7, 8,
     8, 9, 9, 10, 12, 12, 12, 13, 14, 15, 16, 17, 18, 19, 19, 20, 21, 22, 24, 25},
    {0,  1,  1,  1,  2,  2,  4,  4,  4,  5,  5,  5,  8,  9,  9,  10, 10, 11, 13, 14, 16,
     17, 17, 18, 20, 21, 23, 25, 26, 28, 29, 31, 33, 35, 37, 38, 40, 43, 45, 47, 49},
    {0,  1,  1,  2,  2,  4,  4,  6,  6,  8,  8,  8,  10, 12, 16, 12, 17, 16, 18, 21, 20,
     23, 23, 25, 27, 29, 34, 34, 35, 38, 40, 43, 45, 48, 51, 53, 56, 59, 62, 65, 68},
    {0,  1,  1,  2,  4,  4,  4,  5,  6,  8,  8,  11, 11, 16, 16, 18, 16, 19, 21, 25, 25,
     25, 34, 30, 32, 35, 37, 40, 42, 45, 48, 51, 54, 57, 60, 63, 66, 70, 74, 77, 81},
}