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rustc_metadata: remove now-redundant length from the start of the encoding.

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Eduard-Mihai Burtescu 2019-05-22 13:46:14 +03:00
parent 437ca55f23
commit e505857914
1 changed files with 3 additions and 7 deletions
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10
src/librustc_metadata/index.rs
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@ -110,12 +110,8 @@ impl Index<'tcx> {
crate fn write_index(&self, buf: &mut Encoder) -> Lazy<[Self]> {
let pos = buf.position();
// First we write the length of the lower range ...
buf.emit_raw_bytes(&(self.positions.len() as u32 / 4).to_le_bytes());
// ... then the values.
buf.emit_raw_bytes(&self.positions);
Lazy::from_position_and_meta(pos as usize, self.positions.len() / 4 + 1)
Lazy::from_position_and_meta(pos as usize, self.positions.len() / 4)
}
}
@ -124,12 +120,12 @@ impl Lazy<[Index<'tcx>]> {
/// DefIndex (if any).
#[inline(never)]
crate fn lookup(&self, bytes: &[u8], def_index: DefIndex) -> Option<Lazy<Entry<'tcx>>> {
let bytes = &bytes[self.position..];
debug!("Index::lookup: index={:?} len={:?}",
def_index,
self.meta);
let position = u32::read_from_bytes_at(bytes, 1 + def_index.index());
let bytes = &bytes[self.position..][..self.meta * 4];
let position = u32::read_from_bytes_at(bytes, def_index.index());
if position == u32::MAX {
debug!("Index::lookup: position=u32::MAX");
None