Struct cranelift_wasm::wasmparser::CodeSectionReader

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

A reader for the code section of a WebAssembly module.

Implementations

impl<'a> CodeSectionReader<'a>

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

Constructs a new CodeSectionReader for the given data and offset.

pub fn original_position(&self) -> usize

Gets the original position of the reader.

pub fn get_count(&self) -> u32

Gets the count of items in the section.

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

Reads content of the code section.

Examples

use wasmparser::CodeSectionReader;
let mut code_reader = CodeSectionReader::new(data, 0).unwrap();
for _ in 0..code_reader.get_count() {
    let body = code_reader.read().expect("function body");
    let mut binary_reader = body.get_binary_reader();
    assert!(binary_reader.read_var_u32().expect("local count") == 0);
    let op = binary_reader.read_operator().expect("first operator");
    println!("First operator: {:?}", op);
}

Trait Implementations

impl<'a> IntoIterator for CodeSectionReader<'a>

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

Implements iterator over the code section.

Examples

use wasmparser::CodeSectionReader;
let mut code_reader = CodeSectionReader::new(data, 0).unwrap();
for body in code_reader {
    let mut binary_reader = body.expect("b").get_binary_reader();
    assert!(binary_reader.read_var_u32().expect("local count") == 0);
    let op = binary_reader.read_operator().expect("first operator");
    println!("First operator: {:?}", op);
}

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

The type of the elements being iterated over.

type IntoIter = SectionIteratorLimited<CodeSectionReader<'a>>

Which kind of iterator are we turning this into?

impl<'a> SectionReader for CodeSectionReader<'a>

type Item = FunctionBody<'a>

The item returned by the reader.

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

fn get_count(&self) -> u32

Gets the count of the items in the section.