Struct Memory

pub struct Memory { /* private fields */ }

A sequencial memory. It uses Rust’s Vec for internal representation.

Implementations

impl Memory

pub fn new(limit: usize) -> Self

Create a new memory with the given limit.

pub fn limit(&self) -> usize

Memory limit.

pub fn len(&self) -> usize

Get the length of the current memory range.

pub fn effective_len(&self) -> U256

Get the effective length.

pub fn is_empty(&self) -> bool

Return true if current effective memory range is zero.

pub fn data(&self) -> &Vec<u8>

Return the full memory.

pub fn resize_offset( &mut self, offset: U256, len: U256, ) -> Result<(), ExitError>

Resize the memory, making it cover the memory region of offset..(offset + len), with 32 bytes as the step. If the length is zero, this function does nothing.

pub fn resize_end(&mut self, end: U256) -> Result<(), ExitError>

Resize the memory, making it cover to end, with 32 bytes as the step.

pub fn get(&self, offset: usize, size: usize) -> Vec<u8>

Get memory region at given offset.

Panics

Value of size is considered trusted. If they’re too large, the program can run out of memory, or it can overflow.

pub fn set( &mut self, offset: usize, value: &[u8], target_size: Option<usize>, ) -> Result<(), ExitFatal>

Set memory region at given offset. The offset and value is considered untrusted.

pub fn copy_large( &mut self, memory_offset: U256, data_offset: U256, len: U256, data: &[u8], ) -> Result<(), ExitFatal>

Copy data into the memory, of given len.

pub fn copy(&mut self, dst: usize, src: usize, len: usize)

Copies part of the memory inside another part of itself.

Trait Implementations

impl Clone for Memory

fn clone(&self) -> Memory

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Memory

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

Formats the value using the given formatter.