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Types section

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Brian Carroll 2021-11-01 08:34:34 +00:00
parent 6ab00d164c
commit 7ad452d78a
4 changed files with 293 additions and 44 deletions
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19
compiler/gen_wasm/src/serialize.rs
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@ -71,6 +71,7 @@ macro_rules! encode_padded_sleb128 {
pub trait SerialBuffer {
fn append_byte(&mut self, b: u8);
fn set_byte(&mut self, index: usize, b: u8);
fn append_slice(&mut self, b: &[u8]);
fn size(&self) -> usize;
@ -79,6 +80,8 @@ pub trait SerialBuffer {
encode_sleb128!(encode_i32, i32);
encode_sleb128!(encode_i64, i64);
/// Inserts extra entries at the given index by copying the following entries to higher indices
fn insert_space_at(&mut self, index: usize, size: usize);
fn reserve_padded_u32(&mut self) -> usize;
fn encode_padded_u32(&mut self, value: u32) -> usize;
fn overwrite_padded_u32(&mut self, index: usize, value: u32);
@ -122,12 +125,20 @@ impl SerialBuffer for std::vec::Vec<u8> {
fn append_byte(&mut self, b: u8) {
self.push(b);
}
fn set_byte(&mut self, index: usize, b: u8) {
self[index] = b;
}
fn append_slice(&mut self, b: &[u8]) {
self.extend_from_slice(b);
}
fn size(&self) -> usize {
self.len()
}
fn insert_space_at(&mut self, index: usize, size: usize) {
let old_len = self.len();
self.resize(old_len + size, 0);
self.copy_within(index..old_len, index + size);
}
fn reserve_padded_u32(&mut self) -> usize {
let index = self.len();
self.resize(index + 5, 0xff);
@ -149,12 +160,20 @@ impl<'a> SerialBuffer for Vec<'a, u8> {
fn append_byte(&mut self, b: u8) {
self.push(b);
}
fn set_byte(&mut self, index: usize, b: u8) {
self[index] = b;
}
fn append_slice(&mut self, b: &[u8]) {
self.extend_from_slice(b);
}
fn size(&self) -> usize {
self.len()
}
fn insert_space_at(&mut self, index: usize, size: usize) {
let old_len = self.len();
self.resize(old_len + size, 0);
self.copy_within(index..old_len, index + size);
}
fn reserve_padded_u32(&mut self) -> usize {
let index = self.len();
self.resize(index + 5, 0xff);