Struct rust_mqtt::utils::buffer_writer::BuffWriter

pub struct BuffWriter<'a> {
    pub position: usize,
    /* private fields */
}

Buff writer is writing corresponding types to buffer (Byte array) and stores current position (later as cursor)

Fields

position: usize

Implementations

impl<'a> BuffWriter<'a>

pub fn new(buffer: &'a mut [u8], buff_len: usize) -> Self

pub fn get_n_byte(&mut self, n: usize) -> u8

Returns n-th Byte from the buffer to which is currently written.

pub fn get_rem_len(&mut self) -> Result<VariableByteInteger, RemLenError>

Return the remaining lenght of the packet from the buffer to which is packet written.

pub fn insert_ref(&mut self, len: usize, array: &[u8]) -> Result<(), BufferError>

Writes an array to the buffer.

pub fn write_u8(&mut self, byte: u8) -> Result<(), BufferError>

Writes a single Byte to the buffer.

pub fn write_u16(&mut self, two_bytes: u16) -> Result<(), BufferError>

Writes the two Byte value to the buffer.

pub fn write_u32(&mut self, four_bytes: u32) -> Result<(), BufferError>

Writes the four Byte value to the buffer.

pub fn write_string_ref(
    &mut self,
    str: &EncodedString<'a>
) -> Result<(), BufferError>

Writes the UTF-8 string type to the buffer.

pub fn write_binary_ref(
    &mut self,
    bin: &BinaryData<'a>
) -> Result<(), BufferError>

Writes BinaryData to the buffer.

pub fn write_string_pair_ref(
    &mut self,
    str_pair: &StringPair<'a>
) -> Result<(), BufferError>

Writes the string pair to the buffer.

pub fn write_variable_byte_int(&mut self, int: u32) -> Result<(), BufferError>

Encodes the u32 value into the VariableByteInteger and this value writes to the buffer.

pub fn write_properties<const LEN: usize>(
    &mut self,
    properties: &Vec<Property<'a>, LEN>
) -> Result<(), BufferError>

Writes all properties from the properties Vec into the buffer.

pub fn write_topic_filters_ref<const MAX: usize>(
    &mut self,
    sub: bool,
    len: usize,
    filters: &Vec<TopicFilter<'a>, MAX>
) -> Result<(), BufferError>

Writes the topic filter Vec to the buffer. If the sub option is set to false, it will not write the sub_options only topic names.