Struct DataWriter 

pub struct DataWriter<'a> { /* private fields */ }

Sequential write cursor over a mutable byte slice.

Implementations

impl<'a> DataWriter<'a>

pub fn new(data: &'a mut [u8]) -> Self

Create a new writer at position 0.

pub const fn written(&self) -> usize

How many bytes have been written.

pub const fn remaining(&self) -> usize

Remaining writable bytes.

pub fn write_u8(&mut self, v: u8) -> Result<(), ProgramError>

Write a u8 and advance.

pub fn write_u16(&mut self, v: u16) -> Result<(), ProgramError>

Write a little-endian u16 and advance.

pub fn write_u32(&mut self, v: u32) -> Result<(), ProgramError>

Write a little-endian u32 and advance.

pub fn write_u64(&mut self, v: u64) -> Result<(), ProgramError>

Write a little-endian u64 and advance.

pub fn write_bool(&mut self, v: bool) -> Result<(), ProgramError>

Write a boolean (normalized to 0x00 or 0x01) and advance.

pub fn write_address(&mut self, addr: &[u8; 32]) -> Result<(), ProgramError>

Write a 32-byte address and advance.

pub fn write_bytes(&mut self, src: &[u8]) -> Result<(), ProgramError>

Write raw bytes and advance.