Revision control
Copy as Markdown
Other Tools
/* Copyright 2018 Mozilla Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
use crate::{BinaryReader, FromReader, Result, SectionLimited};
/// A reader for the export section of a WebAssembly module.
pub type ExportSectionReader<'a> = SectionLimited<'a, Export<'a>>;
/// External types as defined [here].
///
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
pub enum ExternalKind {
/// The external kind is a function.
Func,
/// The external kind if a table.
Table,
/// The external kind is a memory.
Memory,
/// The external kind is a global.
Global,
/// The external kind is a tag.
Tag,
}
/// Represents an export in a WebAssembly module.
#[derive(Debug, Copy, Clone, Eq, PartialEq)]
pub struct Export<'a> {
/// The name of the exported item.
pub name: &'a str,
/// The kind of the export.
pub kind: ExternalKind,
/// The index of the exported item.
pub index: u32,
}
impl<'a> FromReader<'a> for Export<'a> {
fn from_reader(reader: &mut BinaryReader<'a>) -> Result<Self> {
Ok(Export {
name: reader.read_string()?,
kind: reader.read()?,
index: reader.read_var_u32()?,
})
}
}
impl<'a> FromReader<'a> for ExternalKind {
fn from_reader(reader: &mut BinaryReader<'a>) -> Result<Self> {
let offset = reader.original_position();
let byte = reader.read_u8()?;
BinaryReader::external_kind_from_byte(byte, offset)
}
}