multiboot2_host/bootinfo/
mod.rs

1use byteorder::{WriteBytesExt, LE};
2use std::io::Write;
3
4mod tag;
5pub use tag::{MemMapEntry, RegionType, Tag, TagType};
6
7pub fn bootinfo_size<'a, I: IntoIterator<Item = &'a Tag>>(tags: I) -> u32 {
8    8 + tags.into_iter().map(Tag::size).sum::<u32>()
9}
10
11pub fn write_bootinfo<'a, I, W>(tags: I, mut w: W) -> std::io::Result<()>
12where
13    // &'a [Tag] or &'a Vec<Tag> or std::slice::Iter<'a, Tag> or something
14    I: IntoIterator<Item = &'a Tag> + Clone,
15    W: Write,
16{
17    w.write_u32::<LE>(bootinfo_size(tags.clone()))?;
18    w.write_u32::<LE>(0)?;
19
20    let mut final_tag = None;
21    for tag in tags {
22        final_tag = Some(tag);
23        tag.write_to(&mut w)?;
24    }
25
26    match final_tag {
27        Some(Tag::End) => Ok(()),
28        _ => Err(std::io::Error::new(
29            std::io::ErrorKind::InvalidData,
30            "bootinfo tags must end with Tag::End",
31        )),
32    }
33}
multiboot2_host/bootinfo/mod.rs

multiboot2_host/bootinfo/
mod.rs
