Struct BufferMut

pub struct BufferMut<'instance> { /* private fields */ }

A live mutable buffer in the WASM linear memory.

Implementations

impl<'instance> BufferMut<'instance>

pub fn write<T>(&mut self, obj: T) -> Result<(), Error>

where T: AsRef<[u8]>,

Tries to write data into the buffer, after any unread bytes.

Will return an error if there is insufficient space.

pub fn read_bytes(&self, len: usize) -> &[u8]

Read bytes specified number of bytes from the buffer.

Always reads from the beginning.

pub fn shared(self) -> Buffer<'instance>

Give ownership of the buffer back to the guest.

pub fn capacity(&self) -> usize

Return the buffer capacity.

pub unsafe fn from_ptr( builder_ptr: *mut BufferBuilder, linear_mem_space: WasmLinearMem, ) -> Self

Safety

The pointer passed come from a previous call to initiate_buffer exported function from the contract.

pub fn ptr(&self) -> *mut BufferBuilder

A pointer to the linear memory address.

Trait Implementations

impl<'instance> Debug for BufferMut<'instance>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.