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/* 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
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* 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 super::{
BinaryReader, Range, Result, SectionIteratorLimited, SectionReader, SectionWithLimitedItems,
TableType,
};
#[derive(Clone)]
pub struct TableSectionReader<'a> {
reader: BinaryReader<'a>,
count: u32,
}
impl<'a> TableSectionReader<'a> {
pub fn new(data: &'a [u8], offset: usize) -> Result<TableSectionReader<'a>> {
let mut reader = BinaryReader::new_with_offset(data, offset);
let count = reader.read_var_u32()?;
Ok(TableSectionReader { reader, count })
}
pub fn original_position(&self) -> usize {
self.reader.original_position()
}
pub fn get_count(&self) -> u32 {
self.count
}
/// Reads content of the table section.
///
/// # Examples
/// ```
/// use wasmparser::TableSectionReader;
///
/// # let data: &[u8] = &[0x01, 0x70, 0x01, 0x01, 0x01];
/// let mut table_reader = TableSectionReader::new(data, 0).unwrap();
/// for _ in 0..table_reader.get_count() {
/// let table = table_reader.read().expect("table");
/// println!("Table: {:?}", table);
/// }
/// ```
pub fn read(&mut self) -> Result<TableType> {
self.reader.read_table_type()
}
}
impl<'a> SectionReader for TableSectionReader<'a> {
type Item = TableType;
fn read(&mut self) -> Result<Self::Item> {
TableSectionReader::read(self)
}
fn eof(&self) -> bool {
self.reader.eof()
}
fn original_position(&self) -> usize {
TableSectionReader::original_position(self)
}
fn range(&self) -> Range {
self.reader.range()
}
}
impl<'a> SectionWithLimitedItems for TableSectionReader<'a> {
fn get_count(&self) -> u32 {
TableSectionReader::get_count(self)
}
}
impl<'a> IntoIterator for TableSectionReader<'a> {
type Item = Result<TableType>;
type IntoIter = SectionIteratorLimited<TableSectionReader<'a>>;
fn into_iter(self) -> Self::IntoIter {
SectionIteratorLimited::new(self)
}
}
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