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#![deny(missing_docs)]
use anyhow::Context;
use std::fmt::Write;
use std::path::Path;
use wasmprinter::Printer;
use wit_parser::*;
pub fn print_file(file: impl AsRef<Path>) -> anyhow::Result<String> {
_print_file(file.as_ref())
}
fn _print_file(file: &Path) -> anyhow::Result<String> {
let contents = std::fs::read(file).context(format!("failed to read `{}`", file.display()))?;
_print_bytes(&contents)
}
pub fn print_bytes(wasm: impl AsRef<[u8]>) -> anyhow::Result<String> {
_print_bytes(wasm.as_ref())
}
fn _print_bytes(wasm: &[u8]) -> anyhow::Result<String> {
let mut printer = Printer::new();
printer.add_custom_section_printer(wit_schema_version::SECTION_NAME, print_wit);
printer.print(wasm)
}
fn print_wit(printer: &mut Printer, offset: usize, bytes: &[u8]) -> anyhow::Result<()> {
let mut parser = Parser::new(offset, bytes).context("failed to parse header")?;
let mut func = 0;
while !parser.is_empty() {
match parser.section().context("failed to parse section")? {
Section::Type(types) => {
let ret = printer.result_mut();
for (i, ty) in types.into_iter().enumerate() {
let ty = ty.context("failed to parse type")?;
write!(ret, "\n (@interface type (;{};) (func", i)?;
for param in ty.params.iter() {
ret.push_str(" (param ");
push_ty(ret, param);
ret.push_str(")");
}
for result in ty.results.iter() {
ret.push_str(" (result ");
push_ty(ret, result);
ret.push_str(")");
}
ret.push_str("))");
}
}
Section::Import(imports) => {
let ret = printer.result_mut();
for i in imports {
let i = i.context("failed to parse import")?;
write!(
ret,
"\n (@interface import \"{}\" \"{}\" \
(func (;{};) (type {})))",
i.module, i.name, func, i.ty,
)?;
func += 1;
}
}
Section::Export(exports) => {
let ret = printer.result_mut();
for e in exports {
let e = e.context("failed to parse export")?;
ret.push_str("\n (@interface export ");
ret.push_str("\"");
ret.push_str(e.name);
ret.push_str("\" (func ");
ret.push_str(&format!("{}", e.func));
ret.push_str("))");
}
}
Section::Func(funcs) => {
for f in funcs {
let f = f.context("failed to parse func")?;
write!(
printer.result_mut(),
"\n (@interface func (;{};) (type {})",
func,
f.ty
)?;
for instr in f.instrs() {
let instr = instr.context("failed to parse instruction")?;
printer.result_mut().push_str("\n ");
push_instr(printer, &instr)?;
}
printer.result_mut().push_str(")");
func += 1;
}
}
Section::Implement(implements) => {
for i in implements {
let i = i.context("failed to parse implement")?;
printer
.result_mut()
.push_str("\n (@interface implement (func ");
printer.print_func_idx(i.core_func)?;
printer.result_mut().push_str(") (func ");
printer
.result_mut()
.push_str(&format!("{}", i.adapter_func));
printer.result_mut().push_str("))");
}
}
}
}
return Ok(());
fn push_ty(ret: &mut String, param: &ValType) {
match param {
ValType::S8 => ret.push_str("s8"),
ValType::S16 => ret.push_str("s16"),
ValType::S32 => ret.push_str("s32"),
ValType::S64 => ret.push_str("s64"),
ValType::U8 => ret.push_str("u8"),
ValType::U16 => ret.push_str("u16"),
ValType::U32 => ret.push_str("u32"),
ValType::U64 => ret.push_str("u64"),
ValType::F32 => ret.push_str("f32"),
ValType::F64 => ret.push_str("f64"),
ValType::String => ret.push_str("string"),
ValType::Anyref => ret.push_str("anyref"),
ValType::I32 => ret.push_str("i32"),
ValType::I64 => ret.push_str("i64"),
}
}
fn push_instr(ret: &mut Printer, instr: &Instruction) -> anyhow::Result<()> {
use Instruction::*;
match instr {
ArgGet(i) => write!(ret.result_mut(), "arg.get {}", i)?,
CallCore(i) => {
ret.result_mut().push_str("call-core ");
ret.print_func_idx(*i)?;
}
End => ret.result_mut().push_str("end"),
MemoryToString(mem) => {
ret.result_mut().push_str("memory-to-string");
if *mem != 0 {
write!(ret.result_mut(), " {}", mem)?;
}
}
StringToMemory(payload) => {
ret.result_mut().push_str("string-to-memory ");
ret.print_func_idx(payload.malloc)?;
if payload.mem != 0 {
write!(ret.result_mut(), " {}", payload.mem)?;
}
}
CallAdapter(f) => write!(ret.result_mut(), "call-adapter {}", f)?,
DeferCallCore(f) => {
ret.result_mut().push_str("defer-call-core ");
ret.print_func_idx(*f)?;
}
I32ToS8 => ret.result_mut().push_str("i32-to-s8"),
I32ToS8X => ret.result_mut().push_str("i32-to-s8x"),
I32ToU8 => ret.result_mut().push_str("i32-to-u8"),
I32ToS16 => ret.result_mut().push_str("i32-to-s16"),
I32ToS16X => ret.result_mut().push_str("i32-to-s16x"),
I32ToU16 => ret.result_mut().push_str("i32-to-u16"),
I32ToS32 => ret.result_mut().push_str("i32-to-s32"),
I32ToU32 => ret.result_mut().push_str("i32-to-u32"),
I32ToS64 => ret.result_mut().push_str("i32-to-s64"),
I32ToU64 => ret.result_mut().push_str("i32-to-u64"),
I64ToS8 => ret.result_mut().push_str("i64-to-s8"),
I64ToS8X => ret.result_mut().push_str("i64-to-s8x"),
I64ToU8 => ret.result_mut().push_str("i64-to-u8"),
I64ToS16 => ret.result_mut().push_str("i64-to-s16"),
I64ToS16X => ret.result_mut().push_str("i64-to-s16x"),
I64ToU16 => ret.result_mut().push_str("i64-to-u16"),
I64ToS32 => ret.result_mut().push_str("i64-to-s32"),
I64ToS32X => ret.result_mut().push_str("i64-to-s32x"),
I64ToU32 => ret.result_mut().push_str("i64-to-u32"),
I64ToS64 => ret.result_mut().push_str("i64-to-s64"),
I64ToU64 => ret.result_mut().push_str("i64-to-u64"),
S8ToI32 => ret.result_mut().push_str("s8-to-i32"),
U8ToI32 => ret.result_mut().push_str("u8-to-i32"),
S16ToI32 => ret.result_mut().push_str("s16-to-i32"),
U16ToI32 => ret.result_mut().push_str("u16-to-i32"),
S32ToI32 => ret.result_mut().push_str("s32-to-i32"),
U32ToI32 => ret.result_mut().push_str("u32-to-i32"),
S64ToI32 => ret.result_mut().push_str("s64-to-i32"),
S64ToI32X => ret.result_mut().push_str("s64-to-i32x"),
U64ToI32 => ret.result_mut().push_str("u64-to-i32"),
U64ToI32X => ret.result_mut().push_str("u64-to-i32x"),
S8ToI64 => ret.result_mut().push_str("s8-to-i64"),
U8ToI64 => ret.result_mut().push_str("u8-to-i64"),
S16ToI64 => ret.result_mut().push_str("s16-to-i64"),
U16ToI64 => ret.result_mut().push_str("u16-to-i64"),
S32ToI64 => ret.result_mut().push_str("s32-to-i64"),
U32ToI64 => ret.result_mut().push_str("u32-to-i64"),
S64ToI64 => ret.result_mut().push_str("s64-to-i64"),
U64ToI64 => ret.result_mut().push_str("u64-to-i64"),
}
Ok(())
}
}