Struct wasmtime_environ::wasmparser::DataSectionReader

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

A reader for the data section of a WebAssembly module.

Implementations

impl<'a> DataSectionReader<'a>

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

Constructs a new DataSectionReader 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<Data<'b>, BinaryReaderError>where 'a: 'b,

Reads content of the data section.

Examples

use wasmparser::{DataSectionReader, DataKind};
let mut data_reader = DataSectionReader::new(data, 0).unwrap();
for _ in 0..data_reader.get_count() {
    let data = data_reader.read().expect("data");
    println!("Data: {:?}", data);
    if let DataKind::Active { offset_expr, .. } = data.kind {
        let mut offset_expr_reader = offset_expr.get_binary_reader();
        let op = offset_expr_reader.read_operator().expect("op");
        println!("offset expression: {:?}", op);
    }
}

Trait Implementations

impl<'a> Clone for DataSectionReader<'a>

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a> IntoIterator for DataSectionReader<'a>

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

The type of the elements being iterated over.

type IntoIter = SectionIteratorLimited<DataSectionReader<'a>>

Which kind of iterator are we turning this into?

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

Creates an iterator from a value.

impl<'a> SectionReader for DataSectionReader<'a>

type Item = Data<'a>

The item returned by the reader.

fn read( &mut self ) -> Result<<DataSectionReader<'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 DataSectionReader<'a>

fn get_count(&self) -> u32

Gets the count of the items in the section.