Struct qrcode::bits::Bits
[−]
[src]
pub struct Bits {
// some fields omitted
}The Bits structure stores the encoded data for a QR code.
Methods
impl Bits[src]
fn new(version: Version) -> Bits
Constructs a new, empty bits structure.
fn into_bytes(self) -> Vec<u8>
Convert the bits into a bytes vector.
fn len(&self) -> usize
Total number of bits currently pushed.
fn max_len(&self, ec_level: EcLevel) -> QrResult<usize>
The maximum number of bits allowed by the provided QR code version and error correction level.
fn version(&self) -> Version
Version of the QR code.
impl Bits[src]
fn push_mode_indicator(&mut self, mode: ExtendedMode) -> QrResult<()>
Push the mode indicator to the end of the bits.
If the mode is not supported in the provided version, this method
returns Err(QrError::UnsupportedCharacterSet).
impl Bits[src]
fn push_eci_designator(&mut self, eci_designator: u32) -> QrResult<()>
Push an ECI (Extended Channel Interpretation) designator to the bits.
An ECI designator is a 6-digit number to specify the character set of
the following binary data. After calling this method, one could call
.push_byte_data() or similar methods to insert the actual data, e.g.
#![allow(unused_must_use)] use qrcode::bits::Bits; use qrcode::types::Version; let mut bits = Bits::new(Version::Normal(1)); bits.push_eci_designator(9); // 9 = ISO-8859-7 (Greek). bits.push_byte_data(b"\xa1\xa2\xa3\xa4\xa5"); // ΑΒΓΔΕ
The full list of ECI designator values can be found from http://strokescribe.com/en/ECI.html. Some example values are:
| ECI # | Character set |
|---|---|
| 3 | ISO-8859-1 (Western European) |
| 20 | Shift JIS (Japanese) |
| 23 | Windows 1252 (Latin 1) (Western European) |
| 25 | UTF-16 Big Endian |
| 26 | UTF-8 |
| 28 | Big 5 (Traditional Chinese) |
| 29 | GB-18030 (Simplified Chinese) |
| 30 | EUC-KR (Korean) |
If the QR code version does not support ECI, this method will return
Err(QrError::UnsupportedCharacterSet).
If the designator is outside of the expected range, this method will
return Err(QrError::InvalidECIDesignator).
impl Bits[src]
fn push_numeric_data(&mut self, data: &[u8]) -> QrResult<()>
Encodes a numeric string to the bits.
The data should only contain the characters 0 to 9.
impl Bits[src]
fn push_alphanumeric_data(&mut self, data: &[u8]) -> QrResult<()>
Encodes an alphanumeric string to the bits.
The data should only contain the charaters A to Z (excluding lowercase),
0 to 9, space, $, %, *, +, -, ., / or :.
impl Bits[src]
impl Bits[src]
fn push_kanji_data(&mut self, data: &[u8]) -> QrResult<()>
Encodes Shift JIS double-byte data to the bits.
impl Bits[src]
fn push_fnc1_first_position(&mut self) -> QrResult<()>
Encodes an indicator that the following data are formatted according to the UCC/EAN Application Identifiers standard.
#![allow(unused_must_use)] use qrcode::bits::Bits; use qrcode::types::Version; let mut bits = Bits::new(Version::Normal(1)); bits.push_fnc1_first_position(); bits.push_numeric_data(b"01049123451234591597033130128"); bits.push_alphanumeric_data(b"%10ABC123");
In QR code, the character % is used as the data field separator (0x1D).
fn push_fnc1_second_position(&mut self, application_indicator: u8) -> QrResult<()>
Encodes an indicator that the following data are formatted in accordance with specific industry or application specifications previously agreed with AIM International.
#![allow(unused_must_use)] use qrcode::bits::Bits; use qrcode::types::Version; let mut bits = Bits::new(Version::Normal(1)); bits.push_fnc1_second_position(37); bits.push_alphanumeric_data(b"AA1234BBB112"); bits.push_byte_data(b"text text text text\r");
If the application indicator is a single Latin alphabet (a–z / A–Z), please pass in its ASCII value + 100:
bits.push_fnc1_second_position(b'A' + 100);
impl Bits[src]
fn push_terminator(&mut self, ec_level: EcLevel) -> QrResult<()>
Pushes the ending bits to indicate no more data.