Struct wasmtime_environ::wasmparser::ElementSectionReader

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

A reader for the element section of a WebAssembly module.

Implementations

impl<'a> ElementSectionReader<'a>

pub fn new( data: &'a [u8], offset: usize ) -> Result<ElementSectionReader<'a>, BinaryReaderError>

Constructs a new ElementSectionReader for the given data and offset.

pub fn original_position(&self) -> usize

Gets the original position of the section reader.

pub fn get_count(&self) -> u32

Gets the count of items in the section.

pub fn read<'b>(&mut self) -> Result<Element<'b>, BinaryReaderError>where 'a: 'b,

Reads content of the element section.

Examples

use wasmparser::{ElementSectionReader, ElementKind};
let mut element_reader = ElementSectionReader::new(data, 0).unwrap();
for _ in 0..element_reader.get_count() {
    let element = element_reader.read().expect("element");
    if let ElementKind::Active { offset_expr, .. } = element.kind {
        let mut offset_expr_reader = offset_expr.get_binary_reader();
        let op = offset_expr_reader.read_operator().expect("op");
        println!("offset expression: {:?}", op);
    }
    let mut items_reader = element.items.get_items_reader().expect("items reader");
    for _ in 0..items_reader.get_count() {
        let item = items_reader.read().expect("item");
        println!("  Item: {:?}", item);
    }
}

Trait Implementations

impl<'a> Clone for ElementSectionReader<'a>

fn clone(&self) -> ElementSectionReader<'a>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a> IntoIterator for ElementSectionReader<'a>

type Item = Result<Element<'a>, BinaryReaderError>

The type of the elements being iterated over.

type IntoIter = SectionIteratorLimited<ElementSectionReader<'a>>

Which kind of iterator are we turning this into?

fn into_iter(self) -> <ElementSectionReader<'a> as IntoIterator>::IntoIter

Creates an iterator from a value.

impl<'a> SectionReader for ElementSectionReader<'a>

type Item = Element<'a>

The item returned by the reader.

fn read( &mut self ) -> Result<<ElementSectionReader<'a> as SectionReader>::Item, BinaryReaderError>

Reads an item from the section.

fn eof(&self) -> bool

Determines if the reader is at end-of-section.

fn original_position(&self) -> usize

Gets the original position of the reader.

fn range(&self) -> Range<usize>

Gets the range of the reader.

fn ensure_end(&self) -> Result<(), BinaryReaderError>

Ensures the reader is at the end of the section.

impl<'a> SectionWithLimitedItems for ElementSectionReader<'a>

fn get_count(&self) -> u32

Gets the count of the items in the section.