use crate::{checksum::Checksum, checksum_writer::ChecksummedWriter, toc::entry::TocEntry};
use byteorder::WriteBytesExt;
use std::io::Write;
pub const TOC_MAGIC: &[u8] = b"TOC!";
pub struct TocWriter;
impl TocWriter {
pub fn write_into(mut writer: impl Write, entries: &[TocEntry]) -> crate::Result<Checksum> {
use byteorder::LE;
log::trace!("Writing ToC");
log::trace!("ToC: {entries:#?}");
let mut writer = ChecksummedWriter::new(&mut writer);
writer.write_all(TOC_MAGIC)?;
writer.write_u32::<LE>(
#[allow(clippy::expect_used)]
u32::try_from(entries.len())
.expect("table of contents should not have 4 billion or more entries"),
)?;
for entry in entries {
entry.write_into(&mut writer)?;
}
Ok(writer.checksum())
}
}