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#![deny(missing_docs)]
use std::mem;
pub struct Writer {
dst: Vec<u8>,
tmp: Vec<Vec<u8>>,
}
impl Writer {
pub fn new() -> Writer {
let mut w = Writer {
dst: Vec::new(),
tmp: Vec::new(),
};
wit_schema_version::VERSION.encode(&mut w.dst);
return w;
}
pub fn types(&mut self, cnt: u32) -> Types<'_> {
Types {
tmp: self.start_section(cnt),
dst: self,
}
}
pub fn imports(&mut self, cnt: u32) -> Imports<'_> {
Imports {
tmp: self.start_section(cnt),
dst: self,
}
}
pub fn funcs(&mut self, cnt: u32) -> Funcs<'_> {
Funcs {
tmp: self.start_section(cnt),
dst: self,
}
}
pub fn exports(&mut self, cnt: u32) -> Exports<'_> {
Exports {
tmp: self.start_section(cnt),
dst: self,
}
}
pub fn implements(&mut self, cnt: u32) -> Implements<'_> {
Implements {
tmp: self.start_section(cnt),
dst: self,
}
}
pub fn into_payload(self) -> Vec<u8> {
self.dst
}
pub fn into_custom_section(mut self) -> Vec<u8> {
let mut tmp = self.pop_tmp();
wit_schema_version::SECTION_NAME.encode(&mut tmp);
tmp.extend_from_slice(&self.dst);
let mut tmp2 = self.pop_tmp();
tmp2.push(0);
tmp.encode(&mut tmp2);
return tmp2;
}
fn pop_tmp(&mut self) -> Vec<u8> {
self.tmp.pop().unwrap_or(Vec::new())
}
fn push_tmp(&mut self, mut tmp: Vec<u8>) {
tmp.truncate(0);
self.tmp.push(tmp);
}
fn start_section(&mut self, cnt: u32) -> Vec<u8> {
let mut buf = self.pop_tmp();
if cnt > 0 {
cnt.encode(&mut buf);
}
buf
}
fn finish_section(&mut self, id: u8, data: Vec<u8>) {
if data.len() > 0 {
self.dst.push(id);
data.encode(&mut self.dst);
}
self.push_tmp(data);
}
}
pub struct Types<'a> {
dst: &'a mut Writer,
tmp: Vec<u8>,
}
impl Types<'_> {
pub fn add(
&mut self,
nparams: u32,
params: impl FnOnce(&mut Type<'_>),
nresults: u32,
results: impl FnOnce(&mut Type<'_>),
) {
let mut t = Type {
dst: &mut self.tmp,
cnt: 0,
};
nparams.encode(t.dst);
params(&mut t);
assert_eq!(nparams, t.cnt);
t.cnt = 0;
nresults.encode(t.dst);
results(&mut t);
assert_eq!(nresults, t.cnt);
}
}
impl Drop for Types<'_> {
fn drop(&mut self) {
self.dst
.finish_section(0x00, mem::replace(&mut self.tmp, Vec::new()));
}
}
pub struct Type<'a> {
cnt: u32,
dst: &'a mut Vec<u8>,
}
#[allow(missing_docs)]
#[rustfmt::skip]
impl Type<'_> {
fn ty(&mut self, byte: u8) {
self.cnt += 1;
self.dst.push(byte);
}
pub fn s8(&mut self) { self.ty(0x00) }
pub fn s16(&mut self) { self.ty(0x01) }
pub fn s32(&mut self) { self.ty(0x02) }
pub fn s64(&mut self) { self.ty(0x03) }
pub fn u8(&mut self) { self.ty(0x04) }
pub fn u16(&mut self) { self.ty(0x05) }
pub fn u32(&mut self) { self.ty(0x06) }
pub fn u64(&mut self) { self.ty(0x07) }
pub fn f32(&mut self) { self.ty(0x08) }
pub fn f64(&mut self) { self.ty(0x09) }
pub fn string(&mut self) { self.ty(0x0a) }
pub fn externref(&mut self) { self.ty(0x0b) }
pub fn i32(&mut self) { self.ty(0x0c) }
pub fn i64(&mut self) { self.ty(0x0d) }
}
pub struct Imports<'a> {
dst: &'a mut Writer,
tmp: Vec<u8>,
}
impl Imports<'_> {
pub fn add(&mut self, module: &str, name: &str, ty: u32) {
module.encode(&mut self.tmp);
name.encode(&mut self.tmp);
ty.encode(&mut self.tmp);
}
}
impl Drop for Imports<'_> {
fn drop(&mut self) {
self.dst
.finish_section(0x01, mem::replace(&mut self.tmp, Vec::new()));
}
}
pub struct Funcs<'a> {
dst: &'a mut Writer,
tmp: Vec<u8>,
}
impl<'a> Funcs<'a> {
pub fn add(&mut self, ty: u32) -> Instructions<'a, '_> {
let mut dst = self.dst.pop_tmp();
ty.encode(&mut dst);
Instructions {
tmp: dst,
funcs: self,
}
}
}
impl Drop for Funcs<'_> {
fn drop(&mut self) {
self.dst
.finish_section(0x02, mem::replace(&mut self.tmp, Vec::new()));
}
}
pub struct Instructions<'a, 'b> {
tmp: Vec<u8>,
funcs: &'b mut Funcs<'a>,
}
#[allow(missing_docs)]
#[rustfmt::skip]
impl Instructions<'_, '_> {
pub fn arg_get(&mut self, arg: u32) {
self.tmp.push(0x00);
arg.encode(&mut self.tmp);
}
pub fn call_core(&mut self, func: u32) {
self.tmp.push(0x01);
func.encode(&mut self.tmp);
}
pub fn memory_to_string(&mut self, mem: u32) {
self.tmp.push(0x03);
mem.encode(&mut self.tmp);
}
pub fn string_to_memory(&mut self, malloc: u32, mem: u32) {
self.tmp.push(0x04);
malloc.encode(&mut self.tmp);
mem.encode(&mut self.tmp);
}
pub fn call_adapter(&mut self, func: u32) {
self.tmp.push(0x05);
func.encode(&mut self.tmp);
}
pub fn defer_call_core(&mut self, func: u32) {
self.tmp.push(0x06);
func.encode(&mut self.tmp);
}
pub fn i32_to_s8(&mut self) { self.tmp.push(0x07) }
pub fn i32_to_s8x(&mut self) { self.tmp.push(0x08) }
pub fn i32_to_u8(&mut self) { self.tmp.push(0x09) }
pub fn i32_to_s16(&mut self) { self.tmp.push(0x0a) }
pub fn i32_to_s16x(&mut self) { self.tmp.push(0x0b) }
pub fn i32_to_u16(&mut self) { self.tmp.push(0x0c) }
pub fn i32_to_s32(&mut self) { self.tmp.push(0x0d) }
pub fn i32_to_u32(&mut self) { self.tmp.push(0x0e) }
pub fn i32_to_s64(&mut self) { self.tmp.push(0x0f) }
pub fn i32_to_u64(&mut self) { self.tmp.push(0x10) }
pub fn i64_to_s8(&mut self) { self.tmp.push(0x11) }
pub fn i64_to_s8x(&mut self) { self.tmp.push(0x12) }
pub fn i64_to_u8(&mut self) { self.tmp.push(0x13) }
pub fn i64_to_s16(&mut self) { self.tmp.push(0x14) }
pub fn i64_to_s16x(&mut self) { self.tmp.push(0x15) }
pub fn i64_to_u16(&mut self) { self.tmp.push(0x16) }
pub fn i64_to_s32(&mut self) { self.tmp.push(0x17) }
pub fn i64_to_s32x(&mut self) { self.tmp.push(0x18) }
pub fn i64_to_u32(&mut self) { self.tmp.push(0x19) }
pub fn i64_to_s64(&mut self) { self.tmp.push(0x1a) }
pub fn i64_to_u64(&mut self) { self.tmp.push(0x1b) }
pub fn s8_to_i32(&mut self) { self.tmp.push(0x1c) }
pub fn u8_to_i32(&mut self) { self.tmp.push(0x1d) }
pub fn s16_to_i32(&mut self) { self.tmp.push(0x1e) }
pub fn u16_to_i32(&mut self) { self.tmp.push(0x1f) }
pub fn s32_to_i32(&mut self) { self.tmp.push(0x20) }
pub fn u32_to_i32(&mut self) { self.tmp.push(0x21) }
pub fn s64_to_i32(&mut self) { self.tmp.push(0x22) }
pub fn s64_to_i32x(&mut self) { self.tmp.push(0x23) }
pub fn u64_to_i32(&mut self) { self.tmp.push(0x24) }
pub fn u64_to_i32x(&mut self) { self.tmp.push(0x25) }
pub fn s8_to_i64(&mut self) { self.tmp.push(0x26) }
pub fn u8_to_i64(&mut self) { self.tmp.push(0x27) }
pub fn s16_to_i64(&mut self) { self.tmp.push(0x28) }
pub fn u16_to_i64(&mut self) { self.tmp.push(0x29) }
pub fn s32_to_i64(&mut self) { self.tmp.push(0x2a) }
pub fn u32_to_i64(&mut self) { self.tmp.push(0x2b) }
pub fn s64_to_i64(&mut self) { self.tmp.push(0x2c) }
pub fn u64_to_i64(&mut self) { self.tmp.push(0x2d) }
}
impl Drop for Instructions<'_, '_> {
fn drop(&mut self) {
self.tmp.push(0x02);
let buf = mem::replace(&mut self.tmp, Vec::new());
buf.encode(&mut self.funcs.tmp);
self.funcs.dst.push_tmp(buf);
}
}
pub struct Exports<'a> {
dst: &'a mut Writer,
tmp: Vec<u8>,
}
impl Exports<'_> {
pub fn add(&mut self, name: &str, func: u32) {
func.encode(&mut self.tmp);
name.encode(&mut self.tmp);
}
}
impl Drop for Exports<'_> {
fn drop(&mut self) {
self.dst
.finish_section(0x03, mem::replace(&mut self.tmp, Vec::new()));
}
}
pub struct Implements<'a> {
dst: &'a mut Writer,
tmp: Vec<u8>,
}
impl Implements<'_> {
pub fn add(&mut self, core_func: u32, adapter_func: u32) {
core_func.encode(&mut self.tmp);
adapter_func.encode(&mut self.tmp);
}
}
impl Drop for Implements<'_> {
fn drop(&mut self) {
self.dst
.finish_section(0x04, mem::replace(&mut self.tmp, Vec::new()));
}
}
trait Encode {
fn encode(&self, e: &mut Vec<u8>);
}
impl Encode for [u8] {
fn encode(&self, e: &mut Vec<u8>) {
self.len().encode(e);
e.extend_from_slice(self);
}
}
impl Encode for str {
fn encode(&self, e: &mut Vec<u8>) {
self.as_bytes().encode(e);
}
}
impl Encode for usize {
fn encode(&self, e: &mut Vec<u8>) {
assert!(*self <= u32::max_value() as usize);
(*self as u32).encode(e)
}
}
impl Encode for u32 {
fn encode(&self, e: &mut Vec<u8>) {
leb128::write::unsigned(e, (*self).into()).unwrap();
}
}