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use crate::{
BinaryReader, ConstExpr, GlobalType, Result, SectionIteratorLimited, SectionReader,
SectionWithLimitedItems,
};
use std::ops::Range;
#[derive(Debug, Copy, Clone)]
pub struct Global<'a> {
pub ty: GlobalType,
pub init_expr: ConstExpr<'a>,
}
#[derive(Clone)]
pub struct GlobalSectionReader<'a> {
reader: BinaryReader<'a>,
count: u32,
}
impl<'a> GlobalSectionReader<'a> {
pub fn new(data: &'a [u8], offset: usize) -> Result<GlobalSectionReader<'a>> {
let mut reader = BinaryReader::new_with_offset(data, offset);
let count = reader.read_var_u32()?;
Ok(GlobalSectionReader { reader, count })
}
pub fn original_position(&self) -> usize {
self.reader.original_position()
}
pub fn get_count(&self) -> u32 {
self.count
}
pub fn read<'b>(&mut self) -> Result<Global<'b>>
where
'a: 'b,
{
let ty = self.reader.read_global_type()?;
let init_expr = self.reader.read_const_expr()?;
Ok(Global { ty, init_expr })
}
}
impl<'a> SectionReader for GlobalSectionReader<'a> {
type Item = Global<'a>;
fn read(&mut self) -> Result<Self::Item> {
GlobalSectionReader::read(self)
}
fn eof(&self) -> bool {
self.reader.eof()
}
fn original_position(&self) -> usize {
GlobalSectionReader::original_position(self)
}
fn range(&self) -> Range<usize> {
self.reader.range()
}
}
impl<'a> SectionWithLimitedItems for GlobalSectionReader<'a> {
fn get_count(&self) -> u32 {
GlobalSectionReader::get_count(self)
}
}
impl<'a> IntoIterator for GlobalSectionReader<'a> {
type Item = Result<Global<'a>>;
type IntoIter = SectionIteratorLimited<GlobalSectionReader<'a>>;
fn into_iter(self) -> Self::IntoIter {
SectionIteratorLimited::new(self)
}
}