mirror of
https://github.com/fluencelabs/wasm-bindgen
synced 2025-04-02 18:31:05 +00:00
1767 lines
59 KiB
Rust
1767 lines
59 KiB
Rust
use std::collections::{HashSet, HashMap};
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use std::fmt::Write;
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use std::mem;
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use failure::{Error, ResultExt};
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use parity_wasm::elements::*;
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use parity_wasm;
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use serde_json;
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use shared;
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use wasm_gc;
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use super::Bindgen;
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use descriptor::{Descriptor, VectorKind};
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mod js2rust;
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use self::js2rust::Js2Rust;
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mod rust2js;
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use self::rust2js::Rust2Js;
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pub struct Context<'a> {
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pub globals: String,
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pub imports: String,
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pub footer: String,
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pub typescript: String,
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pub exposed_globals: HashSet<&'static str>,
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pub required_internal_exports: HashSet<&'static str>,
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pub config: &'a Bindgen,
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pub module: &'a mut Module,
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pub imported_names: HashSet<String>,
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pub exported_classes: HashMap<String, ExportedClass>,
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pub function_table_needed: bool,
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pub run_descriptor: &'a Fn(&str) -> Option<Vec<u32>>,
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pub module_versions: Vec<(String, String)>,
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}
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#[derive(Default)]
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pub struct ExportedClass {
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comments: String,
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contents: String,
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typescript: String,
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constructor: Option<String>,
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fields: Vec<ClassField>,
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}
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struct ClassField {
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comments: String,
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name: String,
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readonly: bool,
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}
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pub struct SubContext<'a, 'b: 'a> {
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pub program: &'a shared::Program,
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pub cx: &'a mut Context<'b>,
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}
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impl<'a> Context<'a> {
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fn export(&mut self, name: &str, contents: &str, comments: Option<String>) {
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let contents = contents;
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let contents = contents.trim();
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if let Some(ref c) = comments {
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self.globals.push_str(c);
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}
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let global = if self.config.nodejs {
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if contents.starts_with("class") {
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format!("{1}\nmodule.exports.{0} = {0};\n", name, contents)
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} else {
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format!("module.exports.{} = {};\n", name, contents)
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}
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} else if self.config.no_modules {
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if contents.starts_with("class") {
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format!("{1}\n__exports.{0} = {0};\n", name, contents)
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} else {
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format!("__exports.{} = {};\n", name, contents)
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}
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} else {
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if contents.starts_with("function") {
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format!("export function {}{}\n", name, &contents[8..])
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} else if contents.starts_with("class") {
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format!("export {}\n", contents)
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} else {
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format!("export const {} = {};\n", name, contents)
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}
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};
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self.global(&global);
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}
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fn require_internal_export(&mut self, name: &'static str)
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-> Result<(), Error>
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{
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if !self.required_internal_exports.insert(name) {
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return Ok(())
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}
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if let Some(s) = self.module.export_section() {
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if s.entries().iter().any(|e| e.field() == name) {
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return Ok(())
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}
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}
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bail!("the exported function `{}` is required to generate bindings \
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but it was not found in the wasm file, perhaps the `std` feature \
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of the `wasm-bindgen` crate needs to be enabled?",
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name);
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}
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pub fn finalize(&mut self, module_name: &str) -> Result<(String, String), Error> {
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self.write_classes()?;
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self.bind("__wbindgen_object_clone_ref", &|me| {
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me.expose_add_heap_object();
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me.expose_get_object();
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let bump_cnt = if me.config.debug {
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String::from("
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if (typeof(val) === 'number') throw new Error('corrupt slab');
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val.cnt += 1;
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")
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} else {
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String::from("val.cnt += 1;")
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};
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Ok(format!("
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function(idx) {{
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// If this object is on the stack promote it to the heap.
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if ((idx & 1) === 1) return addHeapObject(getObject(idx));
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// Otherwise if the object is on the heap just bump the
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// refcount and move on
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const val = slab[idx >> 1];
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{}
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return idx;
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}}
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", bump_cnt))
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})?;
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self.bind("__wbindgen_object_drop_ref", &|me| {
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me.expose_drop_ref();
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Ok("function(i) {
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dropRef(i);
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}".to_string())
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})?;
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self.bind("__wbindgen_string_new", &|me| {
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me.expose_add_heap_object();
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me.expose_get_string_from_wasm();
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Ok(String::from("
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function(p, l) {
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return addHeapObject(getStringFromWasm(p, l));
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}
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"))
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})?;
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self.bind("__wbindgen_number_new", &|me| {
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me.expose_add_heap_object();
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Ok(String::from("function(i) {
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return addHeapObject(i);
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}"))
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})?;
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self.bind("__wbindgen_number_get", &|me| {
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me.expose_get_object();
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me.expose_uint8_memory();
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Ok(format!("
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function(n, invalid) {{
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let obj = getObject(n);
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if (typeof(obj) === 'number') return obj;
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getUint8Memory()[invalid] = 1;
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return 0;
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}}
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"))
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})?;
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self.bind("__wbindgen_undefined_new", &|me| {
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me.expose_add_heap_object();
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Ok(String::from("function() {
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return addHeapObject(undefined);
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}"))
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})?;
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self.bind("__wbindgen_null_new", &|me| {
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me.expose_add_heap_object();
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Ok(String::from("
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function() {
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return addHeapObject(null);
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}
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"))
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})?;
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self.bind("__wbindgen_is_null", &|me| {
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me.expose_get_object();
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Ok(String::from("
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function(idx) {
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return getObject(idx) === null ? 1 : 0;
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}
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"))
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})?;
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self.bind("__wbindgen_is_undefined", &|me| {
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me.expose_get_object();
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Ok(String::from("
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function(idx) {
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return getObject(idx) === undefined ? 1 : 0;
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}
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"))
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})?;
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self.bind("__wbindgen_boolean_new", &|me| {
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me.expose_add_heap_object();
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Ok(String::from("
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function(v) {
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return addHeapObject(v === 1);
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}
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"))
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})?;
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self.bind("__wbindgen_boolean_get", &|me| {
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me.expose_get_object();
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Ok(String::from("
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function(i) {
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let v = getObject(i);
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if (typeof(v) === 'boolean') {
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return v ? 1 : 0;
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} else {
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return 2;
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}
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}
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"))
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})?;
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self.bind("__wbindgen_symbol_new", &|me| {
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me.expose_get_string_from_wasm();
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me.expose_add_heap_object();
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Ok(format!("
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function(ptr, len) {{
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let a;
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if (ptr === 0) {{
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a = Symbol();
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}} else {{
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a = Symbol(getStringFromWasm(ptr, len));
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}}
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return addHeapObject(a);
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}}
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"))
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})?;
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self.bind("__wbindgen_is_symbol", &|me| {
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me.expose_get_object();
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Ok(String::from("
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function(i) {
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return typeof(getObject(i)) === 'symbol' ? 1 : 0;
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}
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"))
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})?;
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self.bind("__wbindgen_string_get", &|me| {
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me.expose_pass_string_to_wasm()?;
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me.expose_get_object();
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me.expose_uint32_memory();
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Ok(String::from("
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function(i, len_ptr) {
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let obj = getObject(i);
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if (typeof(obj) !== 'string') return 0;
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const [ptr, len] = passStringToWasm(obj);
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getUint32Memory()[len_ptr / 4] = len;
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return ptr;
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}
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"))
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})?;
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self.bind("__wbindgen_cb_drop", &|me| {
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me.expose_drop_ref();
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Ok(String::from("
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function(i) {
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let obj = getObject(i).original;
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obj.a = obj.b = 0;
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dropRef(i);
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}
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"))
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})?;
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self.bind("__wbindgen_cb_forget", &|me| {
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me.expose_drop_ref();
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Ok(String::from("
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function(i) {
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dropRef(i);
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}
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"))
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})?;
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self.bind("__wbindgen_json_parse", &|me| {
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me.expose_add_heap_object();
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me.expose_get_string_from_wasm();
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Ok(String::from("
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function(ptr, len) {
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return addHeapObject(JSON.parse(getStringFromWasm(ptr, len)));
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}
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"))
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})?;
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self.bind("__wbindgen_json_serialize", &|me| {
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me.expose_get_object();
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me.expose_pass_string_to_wasm()?;
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me.expose_uint32_memory();
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Ok(String::from("
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function(idx, ptrptr) {
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const [ptr, len] = passStringToWasm(JSON.stringify(getObject(idx)));
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getUint32Memory()[ptrptr / 4] = ptr;
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return len;
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}
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"))
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})?;
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self.bind("__wbindgen_jsval_eq", &|me| {
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me.expose_get_object();
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Ok(String::from("
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function(a, b) {
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return getObject(a) === getObject(b) ? 1 : 0;
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}
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"))
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})?;
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self.unexport_unused_internal_exports();
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self.gc()?;
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// Note that it's important `throw` comes last *after* we gc. The
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// `__wbindgen_malloc` function may call this but we only want to
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// generate code for this if it's actually live (and __wbindgen_malloc
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// isn't gc'd).
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self.bind("__wbindgen_throw", &|me| {
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me.expose_get_string_from_wasm();
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Ok(format!("
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function(ptr, len) {{
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throw new Error(getStringFromWasm(ptr, len));
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}}
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"))
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})?;
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self.rewrite_imports(module_name);
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let mut js = if self.config.no_modules {
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format!("
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(function() {{
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var wasm;
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const __exports = {{}};
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{globals}
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function init(wasm_path) {{
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return fetch(wasm_path)
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.then(response => response.arrayBuffer())
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.then(buffer => WebAssembly.instantiate(buffer, {{ './{module}': __exports }}))
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.then(({{instance}}) => {{
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wasm = init.wasm = instance.exports;
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return;
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}});
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}};
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self.{global_name} = Object.assign(init, __exports);
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}})();
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",
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globals = self.globals,
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module = module_name,
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global_name = self.config.no_modules_global
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.as_ref()
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.map(|s| &**s)
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.unwrap_or("wasm_bindgen"),
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)
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} else {
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let import_wasm = if self.config.nodejs {
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self.footer.push_str(&format!("wasm = require('./{}_bg');",
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module_name));
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format!("var wasm;")
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} else {
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format!("import * as wasm from './{}_bg.wasm';", module_name)
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};
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format!("\
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/* tslint:disable */\n\
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{import_wasm}\n\
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{imports}\n\
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{globals}\n\
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{footer}",
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import_wasm = import_wasm,
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globals = self.globals,
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imports = self.imports,
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footer = self.footer,
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)
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};
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self.export_table();
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self.gc()?;
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self.add_wasm_pack_section();
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while js.contains("\n\n\n") {
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js = js.replace("\n\n\n", "\n\n");
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}
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Ok((js, self.typescript.clone()))
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}
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fn bind(&mut self, name: &str, f: &Fn(&mut Self) -> Result<String, Error>)
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-> Result<(), Error>
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{
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if !self.wasm_import_needed(name) {
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return Ok(());
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}
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let contents = f(self)
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.with_context(|_| {
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format!("failed to generate internal JS function `{}`", name)
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})?;
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self.export(name, &contents, None);
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Ok(())
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}
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fn write_classes(&mut self) -> Result<(), Error> {
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let classes = mem::replace(&mut self.exported_classes, Default::default());
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for (class, exports) in classes {
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self.write_class(&class, &exports)?;
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}
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Ok(())
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}
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fn write_class(&mut self, name: &str, class: &ExportedClass) -> Result<(), Error> {
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let mut dst = format!("class {} {{\n", name);
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let mut ts_dst = format!("export {}", dst);
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|
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if self.config.debug || class.constructor.is_some() {
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self.expose_constructor_token();
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dst.push_str(&format!("
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static __construct(ptr) {{
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return new {}(new ConstructorToken(ptr));
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}}
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|
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constructor(...args) {{
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if (args.length === 1 && args[0] instanceof ConstructorToken) {{
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this.ptr = args[0].ptr;
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return;
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}}
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", name));
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|
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if let Some(ref constructor) = class.constructor {
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ts_dst.push_str(&format!("constructor(...args: any[]);\n"));
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|
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dst.push_str(&format!("
|
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// This invocation of new will call this constructor with a ConstructorToken
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let instance = {class}.{constructor}(...args);
|
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this.ptr = instance.ptr;
|
|
", class = name, constructor = constructor));
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} else {
|
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dst.push_str("throw new Error('you cannot invoke `new` directly without having a \
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method annotated a constructor');\n");
|
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}
|
|
|
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dst.push_str("}");
|
|
} else {
|
|
dst.push_str(&format!("
|
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static __construct(ptr) {{
|
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return new {}(ptr);
|
|
}}
|
|
|
|
constructor(ptr) {{
|
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this.ptr = ptr;
|
|
}}
|
|
", name));
|
|
}
|
|
|
|
let new_name = shared::new_function(&name);
|
|
if self.wasm_import_needed(&new_name) {
|
|
self.expose_add_heap_object();
|
|
|
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self.export(&new_name, &format!("
|
|
function(ptr) {{
|
|
return addHeapObject({}.__construct(ptr));
|
|
}}
|
|
", name), None);
|
|
}
|
|
|
|
for field in class.fields.iter() {
|
|
let wasm_getter = shared::struct_field_get(name, &field.name);
|
|
let wasm_setter = shared::struct_field_set(name, &field.name);
|
|
let descriptor = match self.describe(&wasm_getter) {
|
|
None => continue,
|
|
Some(d) => d,
|
|
};
|
|
|
|
let set = {
|
|
let mut cx = Js2Rust::new(&field.name, self);
|
|
cx.method(true)
|
|
.argument(&descriptor)?
|
|
.ret(&None)?;
|
|
ts_dst.push_str(&format!("{}{}: {}\n",
|
|
if field.readonly { "readonly " } else { "" },
|
|
field.name,
|
|
&cx.js_arguments[0].1));
|
|
cx.finish("", &format!("wasm.{}", wasm_setter)).0
|
|
};
|
|
let (get, _ts) = Js2Rust::new(&field.name, self)
|
|
.method(true)
|
|
.ret(&Some(descriptor))?
|
|
.finish("", &format!("wasm.{}", wasm_getter));
|
|
if !dst.ends_with("\n") {
|
|
dst.push_str("\n");
|
|
}
|
|
dst.push_str(&field.comments);
|
|
dst.push_str("get ");
|
|
dst.push_str(&field.name);
|
|
dst.push_str(&get);
|
|
dst.push_str("\n");
|
|
if !field.readonly {
|
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dst.push_str("set ");
|
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dst.push_str(&field.name);
|
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dst.push_str(&set);
|
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}
|
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}
|
|
|
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dst.push_str(&format!("
|
|
free() {{
|
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const ptr = this.ptr;
|
|
this.ptr = 0;
|
|
wasm.{}(ptr);
|
|
}}
|
|
", shared::free_function(&name)));
|
|
ts_dst.push_str("free(): void;\n");
|
|
dst.push_str(&class.contents);
|
|
ts_dst.push_str(&class.typescript);
|
|
dst.push_str("}\n");
|
|
ts_dst.push_str("}\n");
|
|
|
|
self.export(&name, &dst, Some(class.comments.clone()));
|
|
self.typescript.push_str(&ts_dst);
|
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|
|
Ok(())
|
|
}
|
|
|
|
fn export_table(&mut self) {
|
|
if !self.function_table_needed {
|
|
return
|
|
}
|
|
for section in self.module.sections_mut() {
|
|
let exports = match *section {
|
|
Section::Export(ref mut s) => s,
|
|
_ => continue,
|
|
};
|
|
let entry = ExportEntry::new("__wbg_function_table".to_string(),
|
|
Internal::Table(0));
|
|
exports.entries_mut().push(entry);
|
|
break
|
|
}
|
|
}
|
|
|
|
fn rewrite_imports(&mut self, module_name: &str) {
|
|
for (name, contents) in self._rewrite_imports(module_name) {
|
|
self.export(&name, &contents, None);
|
|
}
|
|
}
|
|
|
|
fn _rewrite_imports(&mut self, module_name: &str)
|
|
-> Vec<(String, String)>
|
|
{
|
|
let mut math_imports = Vec::new();
|
|
let imports = self.module.sections_mut()
|
|
.iter_mut()
|
|
.filter_map(|s| {
|
|
match *s {
|
|
Section::Import(ref mut s) => Some(s),
|
|
_ => None,
|
|
}
|
|
})
|
|
.flat_map(|s| s.entries_mut());
|
|
|
|
for import in imports {
|
|
if import.module() == "__wbindgen_placeholder__" {
|
|
import.module_mut().truncate(0);
|
|
import.module_mut().push_str("./");
|
|
import.module_mut().push_str(module_name);
|
|
continue;
|
|
}
|
|
|
|
if import.module() != "env" {
|
|
continue;
|
|
}
|
|
|
|
let renamed_import = format!("__wbindgen_{}", import.field());
|
|
let mut bind_math = |expr: &str| {
|
|
math_imports.push((
|
|
renamed_import.clone(),
|
|
format!("function{}", expr),
|
|
));
|
|
};
|
|
|
|
// FIXME(#32): try to not use function shims
|
|
match import.field() {
|
|
"Math_acos" => bind_math("(x) { return Math.acos(x); }"),
|
|
"Math_asin" => bind_math("(x) { return Math.asin(x); }"),
|
|
"Math_atan" => bind_math("(x) { return Math.atan(x); }"),
|
|
"Math_atan2" => bind_math("(x, y) { return Math.atan2(x, y); }"),
|
|
"Math_cbrt" => bind_math("(x) { return Math.cbrt(x); }"),
|
|
"Math_cosh" => bind_math("(x) { return Math.cosh(x); }"),
|
|
"Math_expm1" => bind_math("(x) { return Math.expm1(x); }"),
|
|
"Math_hypot" => bind_math("(x, y) { return Math.hypot(x, y); }"),
|
|
"Math_log1p" => bind_math("(x) { return Math.log1p(x); }"),
|
|
"Math_sinh" => bind_math("(x) { return Math.sinh(x); }"),
|
|
"Math_tan" => bind_math("(x) { return Math.tan(x); }"),
|
|
"Math_tanh" => bind_math("(x) { return Math.tanh(x); }"),
|
|
"cos" => bind_math("(x) { return Math.cos(x); }"),
|
|
"cosf" => bind_math("(x) { return Math.cos(x); }"),
|
|
"exp" => bind_math("(x) { return Math.exp(x); }"),
|
|
"expf" => bind_math("(x) { return Math.exp(x); }"),
|
|
"log2" => bind_math("(x) { return Math.log2(x); }"),
|
|
"log2f" => bind_math("(x) { return Math.log2(x); }"),
|
|
"log10" => bind_math("(x) { return Math.log10(x); }"),
|
|
"log10f" => bind_math("(x) { return Math.log10(x); }"),
|
|
"log" => bind_math("(x) { return Math.log(x); }"),
|
|
"logf" => bind_math("(x) { return Math.log(x); }"),
|
|
"round" => bind_math("(x) { return Math.round(x); }"),
|
|
"roundf" => bind_math("(x) { return Math.round(x); }"),
|
|
"sin" => bind_math("(x) { return Math.sin(x); }"),
|
|
"sinf" => bind_math("(x) { return Math.sin(x); }"),
|
|
"pow" => bind_math("(x, y) { return Math.pow(x, y); }"),
|
|
"powf" => bind_math("(x, y) { return Math.pow(x, y); }"),
|
|
"exp2" => bind_math("(a) { return Math.pow(2, a); }"),
|
|
"exp2f" => bind_math("(a) { return Math.pow(2, a); }"),
|
|
"fmod" => bind_math("(a, b) { return a % b; }"),
|
|
"fmodf" => bind_math("(a, b) { return a % b; }"),
|
|
"fma" => bind_math("(a, b, c) { return (a * b) + c; }"),
|
|
"fmaf" => bind_math("(a, b, c) { return (a * b) + c; }"),
|
|
_ => continue,
|
|
}
|
|
|
|
import.module_mut().truncate(0);
|
|
import.module_mut().push_str("./");
|
|
import.module_mut().push_str(module_name);
|
|
*import.field_mut() = renamed_import.clone();
|
|
}
|
|
|
|
math_imports
|
|
}
|
|
|
|
fn unexport_unused_internal_exports(&mut self) {
|
|
let required = &self.required_internal_exports;
|
|
for section in self.module.sections_mut() {
|
|
let exports = match *section {
|
|
Section::Export(ref mut s) => s,
|
|
_ => continue,
|
|
};
|
|
exports.entries_mut().retain(|export| {
|
|
!export.field().starts_with("__wbindgen") ||
|
|
required.contains(export.field())
|
|
});
|
|
}
|
|
}
|
|
|
|
fn expose_drop_ref(&mut self) {
|
|
if !self.exposed_globals.insert("drop_ref") {
|
|
return;
|
|
}
|
|
self.expose_global_slab();
|
|
self.expose_global_slab_next();
|
|
let validate_owned = if self.config.debug {
|
|
String::from("
|
|
if ((idx & 1) === 1) throw new Error('cannot drop ref of stack objects');
|
|
")
|
|
} else {
|
|
String::new()
|
|
};
|
|
let dec_ref = if self.config.debug {
|
|
String::from("
|
|
if (typeof(obj) === 'number') throw new Error('corrupt slab');
|
|
obj.cnt -= 1;
|
|
if (obj.cnt > 0) return;
|
|
")
|
|
} else {
|
|
String::from("
|
|
obj.cnt -= 1;
|
|
if (obj.cnt > 0) return;
|
|
")
|
|
};
|
|
self.global(&format!("
|
|
function dropRef(idx) {{
|
|
{}
|
|
let obj = slab[idx >> 1];
|
|
{}
|
|
// If we hit 0 then free up our space in the slab
|
|
slab[idx >> 1] = slab_next;
|
|
slab_next = idx >> 1;
|
|
}}
|
|
", validate_owned, dec_ref));
|
|
}
|
|
|
|
fn expose_global_stack(&mut self) {
|
|
if !self.exposed_globals.insert("stack") {
|
|
return;
|
|
}
|
|
self.global(&format!("
|
|
let stack = [];
|
|
"));
|
|
if self.config.debug {
|
|
self.export("assertStackEmpty", "
|
|
function() {
|
|
if (stack.length === 0) return;
|
|
throw new Error('stack is not currently empty');
|
|
}
|
|
", None);
|
|
}
|
|
}
|
|
|
|
fn expose_global_slab(&mut self) {
|
|
if !self.exposed_globals.insert("slab") {
|
|
return;
|
|
}
|
|
let initial_values = [
|
|
"{ obj: null }",
|
|
"{ obj: undefined }",
|
|
"{ obj: true }",
|
|
"{ obj: false }",
|
|
];
|
|
self.global(&format!("let slab = [{}];", initial_values.join(", ")));
|
|
if self.config.debug {
|
|
self.export("assertSlabEmpty", &format!("
|
|
function() {{
|
|
for (let i = {}; i < slab.length; i++) {{
|
|
if (typeof(slab[i]) === 'number') continue;
|
|
throw new Error('slab is not currently empty');
|
|
}}
|
|
}}
|
|
", initial_values.len()), None);
|
|
}
|
|
}
|
|
|
|
fn expose_global_slab_next(&mut self) {
|
|
if !self.exposed_globals.insert("slab_next") {
|
|
return;
|
|
}
|
|
self.expose_global_slab();
|
|
self.global(&format!("
|
|
let slab_next = slab.length;
|
|
"));
|
|
}
|
|
|
|
fn expose_get_object(&mut self) {
|
|
if !self.exposed_globals.insert("get_object") {
|
|
return;
|
|
}
|
|
self.expose_global_stack();
|
|
self.expose_global_slab();
|
|
|
|
let get_obj = if self.config.debug {
|
|
String::from("
|
|
if (typeof(val) === 'number') throw new Error('corrupt slab');
|
|
return val.obj;
|
|
")
|
|
} else {
|
|
String::from("
|
|
return val.obj;
|
|
")
|
|
};
|
|
self.global(&format!("
|
|
function getObject(idx) {{
|
|
if ((idx & 1) === 1) {{
|
|
return stack[idx >> 1];
|
|
}} else {{
|
|
const val = slab[idx >> 1];
|
|
{}
|
|
}}
|
|
}}
|
|
", get_obj));
|
|
}
|
|
|
|
fn expose_assert_num(&mut self) {
|
|
if !self.exposed_globals.insert("assert_num") {
|
|
return;
|
|
}
|
|
self.global(&format!("
|
|
function _assertNum(n) {{
|
|
if (typeof(n) !== 'number') throw new Error('expected a number argument');
|
|
}}
|
|
"));
|
|
}
|
|
|
|
fn expose_assert_bool(&mut self) {
|
|
if !self.exposed_globals.insert("assert_bool") {
|
|
return;
|
|
}
|
|
self.global(&format!("
|
|
function _assertBoolean(n) {{
|
|
if (typeof(n) !== 'boolean') {{
|
|
throw new Error('expected a boolean argument');
|
|
}}
|
|
}}
|
|
"));
|
|
}
|
|
|
|
fn expose_pass_string_to_wasm(&mut self) -> Result<(), Error> {
|
|
if !self.exposed_globals.insert("pass_string_to_wasm") {
|
|
return Ok(());
|
|
}
|
|
self.require_internal_export("__wbindgen_malloc")?;
|
|
self.expose_text_encoder();
|
|
self.expose_uint8_memory();
|
|
let debug = if self.config.debug {
|
|
"
|
|
if (typeof(arg) !== 'string') throw new Error('expected a string argument');
|
|
"
|
|
} else {
|
|
""
|
|
};
|
|
self.global(&format!("
|
|
function passStringToWasm(arg) {{
|
|
{}
|
|
const buf = cachedEncoder.encode(arg);
|
|
const ptr = wasm.__wbindgen_malloc(buf.length);
|
|
getUint8Memory().set(buf, ptr);
|
|
return [ptr, buf.length];
|
|
}}
|
|
", debug));
|
|
Ok(())
|
|
}
|
|
|
|
fn expose_pass_array8_to_wasm(&mut self) -> Result<(), Error> {
|
|
self.expose_uint8_memory();
|
|
self.pass_array_to_wasm("passArray8ToWasm", "getUint8Memory", 1)
|
|
}
|
|
|
|
fn expose_pass_array16_to_wasm(&mut self) -> Result<(), Error> {
|
|
self.expose_uint16_memory();
|
|
self.pass_array_to_wasm("passArray16ToWasm", "getUint16Memory", 2)
|
|
}
|
|
|
|
fn expose_pass_array32_to_wasm(&mut self) -> Result<(), Error> {
|
|
self.expose_uint32_memory();
|
|
self.pass_array_to_wasm("passArray32ToWasm", "getUint32Memory", 4)
|
|
}
|
|
|
|
fn expose_pass_array64_to_wasm(&mut self) -> Result<(), Error> {
|
|
self.expose_uint64_memory();
|
|
self.pass_array_to_wasm("passArray64ToWasm", "getUint64Memory", 8)
|
|
}
|
|
|
|
fn expose_pass_array_f32_to_wasm(&mut self) -> Result<(), Error> {
|
|
self.expose_f32_memory();
|
|
self.pass_array_to_wasm("passArrayF32ToWasm", "getFloat32Memory", 4)
|
|
}
|
|
|
|
fn expose_pass_array_f64_to_wasm(&mut self) -> Result<(), Error> {
|
|
self.expose_f64_memory();
|
|
self.pass_array_to_wasm("passArrayF64ToWasm", "getFloat64Memory", 8)
|
|
}
|
|
|
|
fn pass_array_to_wasm(&mut self,
|
|
name: &'static str,
|
|
delegate: &str,
|
|
size: usize) -> Result<(), Error>
|
|
{
|
|
if !self.exposed_globals.insert(name) {
|
|
return Ok(())
|
|
}
|
|
self.require_internal_export("__wbindgen_malloc")?;
|
|
self.expose_uint64_memory();
|
|
self.global(&format!("
|
|
function {}(arg) {{
|
|
const ptr = wasm.__wbindgen_malloc(arg.length * {size});
|
|
{}().set(arg, ptr / {size});
|
|
return [ptr, arg.length];
|
|
}}
|
|
", name, delegate, size = size));
|
|
Ok(())
|
|
}
|
|
|
|
fn expose_text_encoder(&mut self) {
|
|
if !self.exposed_globals.insert("text_encoder") {
|
|
return;
|
|
}
|
|
if self.config.nodejs {
|
|
self.global(&format!("
|
|
const TextEncoder = require('util').TextEncoder;
|
|
"));
|
|
} else if !(self.config.browser || self.config.no_modules) {
|
|
self.global(&format!("
|
|
const TextEncoder = typeof self === 'object' && self.TextEncoder
|
|
? self.TextEncoder
|
|
: require('util').TextEncoder;
|
|
"));
|
|
}
|
|
self.global(&format!("
|
|
let cachedEncoder = new TextEncoder('utf-8');
|
|
"));
|
|
}
|
|
|
|
fn expose_text_decoder(&mut self) {
|
|
if !self.exposed_globals.insert("text_decoder") {
|
|
return;
|
|
}
|
|
if self.config.nodejs {
|
|
self.global(&format!("
|
|
const TextDecoder = require('util').TextDecoder;
|
|
"));
|
|
} else if !(self.config.browser || self.config.no_modules) {
|
|
self.global(&format!("
|
|
const TextDecoder = typeof self === 'object' && self.TextDecoder
|
|
? self.TextDecoder
|
|
: require('util').TextDecoder;
|
|
"));
|
|
}
|
|
self.global(&format!("
|
|
let cachedDecoder = new TextDecoder('utf-8');
|
|
"));
|
|
}
|
|
|
|
fn expose_constructor_token(&mut self) {
|
|
if !self.exposed_globals.insert("ConstructorToken") {
|
|
return;
|
|
}
|
|
|
|
self.global("
|
|
class ConstructorToken {
|
|
constructor(ptr) {
|
|
this.ptr = ptr;
|
|
}
|
|
}
|
|
");
|
|
}
|
|
|
|
fn expose_get_string_from_wasm(&mut self) {
|
|
if !self.exposed_globals.insert("get_string_from_wasm") {
|
|
return;
|
|
}
|
|
self.expose_text_decoder();
|
|
self.expose_uint8_memory();
|
|
self.global(&format!("
|
|
function getStringFromWasm(ptr, len) {{
|
|
return cachedDecoder.decode(getUint8Memory().subarray(ptr, ptr + len));
|
|
}}
|
|
"));
|
|
}
|
|
|
|
fn expose_get_array_js_value_from_wasm(&mut self) {
|
|
if !self.exposed_globals.insert("get_array_js_value_from_wasm") {
|
|
return;
|
|
}
|
|
self.expose_get_array_u32_from_wasm();
|
|
self.expose_take_object();
|
|
self.global(&format!("
|
|
function getArrayJsValueFromWasm(ptr, len) {{
|
|
const mem = getUint32Memory();
|
|
const slice = mem.subarray(ptr / 4, ptr / 4 + len);
|
|
const result = [];
|
|
for (let i = 0; i < slice.length; i++) {{
|
|
result.push(takeObject(slice[i]));
|
|
}}
|
|
return result;
|
|
}}
|
|
"));
|
|
}
|
|
|
|
fn expose_get_array_i8_from_wasm(&mut self) {
|
|
self.expose_int8_memory();
|
|
self.arrayget("getArrayI8FromWasm", "getInt8Memory", 1);
|
|
}
|
|
|
|
fn expose_get_array_u8_from_wasm(&mut self) {
|
|
self.expose_uint8_memory();
|
|
self.arrayget("getArrayU8FromWasm", "getUint8Memory", 1);
|
|
}
|
|
|
|
fn expose_get_array_i16_from_wasm(&mut self) {
|
|
self.expose_int16_memory();
|
|
self.arrayget("getArrayI16FromWasm", "getInt16Memory", 2);
|
|
}
|
|
|
|
fn expose_get_array_u16_from_wasm(&mut self) {
|
|
self.expose_uint16_memory();
|
|
self.arrayget("getArrayU16FromWasm", "getUint16Memory", 2);
|
|
}
|
|
|
|
fn expose_get_array_i32_from_wasm(&mut self) {
|
|
self.expose_int32_memory();
|
|
self.arrayget("getArrayI32FromWasm", "getInt32Memory", 4);
|
|
}
|
|
|
|
fn expose_get_array_u32_from_wasm(&mut self) {
|
|
self.expose_uint32_memory();
|
|
self.arrayget("getArrayU32FromWasm", "getUint32Memory", 4);
|
|
}
|
|
|
|
fn expose_get_array_i64_from_wasm(&mut self) {
|
|
self.expose_int64_memory();
|
|
self.arrayget("getArrayI64FromWasm", "getInt64Memory", 8);
|
|
}
|
|
|
|
fn expose_get_array_u64_from_wasm(&mut self) {
|
|
self.expose_uint64_memory();
|
|
self.arrayget("getArrayU64FromWasm", "getUint64Memory", 8);
|
|
}
|
|
|
|
fn expose_get_array_f32_from_wasm(&mut self) {
|
|
self.expose_f32_memory();
|
|
self.arrayget("getArrayF32FromWasm", "getFloat32Memory", 4);
|
|
}
|
|
|
|
fn expose_get_array_f64_from_wasm(&mut self) {
|
|
self.expose_f64_memory();
|
|
self.arrayget("getArrayF64FromWasm", "getFloat64Memory", 8);
|
|
}
|
|
|
|
fn arrayget(&mut self, name: &'static str, mem: &'static str, size: usize) {
|
|
if !self.exposed_globals.insert(name) {
|
|
return;
|
|
}
|
|
self.global(&format!("
|
|
function {name}(ptr, len) {{
|
|
return {mem}().subarray(ptr / {size}, ptr / {size} + len);
|
|
}}
|
|
",
|
|
name = name,
|
|
mem = mem,
|
|
size = size,
|
|
));
|
|
}
|
|
|
|
fn expose_int8_memory(&mut self) {
|
|
self.memview("getInt8Memory", "Int8Array");
|
|
}
|
|
|
|
fn expose_uint8_memory(&mut self) {
|
|
self.memview("getUint8Memory", "Uint8Array");
|
|
}
|
|
|
|
fn expose_int16_memory(&mut self) {
|
|
self.memview("getInt16Memory", "Int16Array");
|
|
}
|
|
|
|
fn expose_uint16_memory(&mut self) {
|
|
self.memview("getUint16Memory", "Uint16Array");
|
|
}
|
|
|
|
fn expose_int32_memory(&mut self) {
|
|
self.memview("getInt32Memory", "Int32Array");
|
|
}
|
|
|
|
fn expose_uint32_memory(&mut self) {
|
|
self.memview("getUint32Memory", "Uint32Array");
|
|
}
|
|
|
|
fn expose_int64_memory(&mut self) {
|
|
self.memview("getInt64Memory", "BigInt64Array");
|
|
}
|
|
|
|
fn expose_uint64_memory(&mut self) {
|
|
self.memview("getUint64Memory", "BigUint64Array");
|
|
}
|
|
|
|
fn expose_f32_memory(&mut self) {
|
|
self.memview("getFloat32Memory", "Float32Array");
|
|
}
|
|
|
|
fn expose_f64_memory(&mut self) {
|
|
self.memview("getFloat64Memory", "Float64Array");
|
|
}
|
|
|
|
fn memview_function(&mut self, t: VectorKind) -> &'static str {
|
|
match t {
|
|
VectorKind::String => {
|
|
self.expose_uint8_memory();
|
|
"getUint8Memory"
|
|
}
|
|
VectorKind::I8 => {
|
|
self.expose_int8_memory();
|
|
"getInt8Memory"
|
|
}
|
|
VectorKind::U8 => {
|
|
self.expose_uint8_memory();
|
|
"getUint8Memory"
|
|
}
|
|
VectorKind::I16 => {
|
|
self.expose_int16_memory();
|
|
"getInt16Memory"
|
|
}
|
|
VectorKind::U16 => {
|
|
self.expose_uint16_memory();
|
|
"getUint16Memory"
|
|
}
|
|
VectorKind::I32 => {
|
|
self.expose_int32_memory();
|
|
"getInt32Memory"
|
|
}
|
|
VectorKind::U32 => {
|
|
self.expose_uint32_memory();
|
|
"getUint32Memory"
|
|
}
|
|
VectorKind::I64 => {
|
|
self.expose_int64_memory();
|
|
"getInt64Memory"
|
|
}
|
|
VectorKind::U64 => {
|
|
self.expose_uint64_memory();
|
|
"getUint64Memory"
|
|
}
|
|
VectorKind::F32 => {
|
|
self.expose_f32_memory();
|
|
"getFloat32Memory"
|
|
}
|
|
VectorKind::F64 => {
|
|
self.expose_f64_memory();
|
|
"getFloat64Memory"
|
|
}
|
|
VectorKind::Anyref => {
|
|
self.expose_uint32_memory();
|
|
"getUint32Memory"
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
fn memview(&mut self, name: &'static str, js: &str) {
|
|
if !self.exposed_globals.insert(name) {
|
|
return;
|
|
}
|
|
self.global(&format!("
|
|
let cache{name} = null;
|
|
function {name}() {{
|
|
if (cache{name} === null || cache{name}.buffer !== wasm.memory.buffer) {{
|
|
cache{name} = new {js}(wasm.memory.buffer);
|
|
}}
|
|
return cache{name};
|
|
}}
|
|
",
|
|
name = name,
|
|
js = js,
|
|
));
|
|
}
|
|
|
|
fn expose_assert_class(&mut self) {
|
|
if !self.exposed_globals.insert("assert_class") {
|
|
return;
|
|
}
|
|
self.global(&format!("
|
|
function _assertClass(instance, klass) {{
|
|
if (!(instance instanceof klass)) {{
|
|
throw new Error(`expected instance of ${{klass.name}}`);
|
|
}}
|
|
return instance.ptr;
|
|
}}
|
|
"));
|
|
}
|
|
|
|
fn expose_borrowed_objects(&mut self) {
|
|
if !self.exposed_globals.insert("borrowed_objects") {
|
|
return;
|
|
}
|
|
self.expose_global_stack();
|
|
self.global(&format!("
|
|
function addBorrowedObject(obj) {{
|
|
stack.push(obj);
|
|
return ((stack.length - 1) << 1) | 1;
|
|
}}
|
|
"));
|
|
}
|
|
|
|
fn expose_take_object(&mut self) {
|
|
if !self.exposed_globals.insert("take_object") {
|
|
return;
|
|
}
|
|
self.expose_get_object();
|
|
self.expose_drop_ref();
|
|
self.global(&format!("
|
|
function takeObject(idx) {{
|
|
const ret = getObject(idx);
|
|
dropRef(idx);
|
|
return ret;
|
|
}}
|
|
"));
|
|
}
|
|
|
|
fn expose_add_heap_object(&mut self) {
|
|
if !self.exposed_globals.insert("add_heap_object") {
|
|
return;
|
|
}
|
|
self.expose_global_slab();
|
|
self.expose_global_slab_next();
|
|
let set_slab_next = if self.config.debug {
|
|
String::from("
|
|
if (typeof(next) !== 'number') throw new Error('corrupt slab');
|
|
slab_next = next;
|
|
")
|
|
} else {
|
|
String::from("
|
|
slab_next = next;
|
|
")
|
|
};
|
|
self.global(&format!("
|
|
function addHeapObject(obj) {{
|
|
if (slab_next === slab.length) slab.push(slab.length + 1);
|
|
const idx = slab_next;
|
|
const next = slab[idx];
|
|
{}
|
|
slab[idx] = {{ obj, cnt: 1 }};
|
|
return idx << 1;
|
|
}}
|
|
", set_slab_next));
|
|
}
|
|
|
|
fn wasm_import_needed(&self, name: &str) -> bool {
|
|
let imports = match self.module.import_section() {
|
|
Some(s) => s,
|
|
None => return false,
|
|
};
|
|
|
|
imports.entries().iter().any(|i| {
|
|
i.module() == "__wbindgen_placeholder__" && i.field() == name
|
|
})
|
|
}
|
|
|
|
fn pass_to_wasm_function(&mut self, t: VectorKind) -> Result<&'static str, Error> {
|
|
let s = match t {
|
|
VectorKind::String => {
|
|
self.expose_pass_string_to_wasm()?;
|
|
"passStringToWasm"
|
|
}
|
|
VectorKind::I8 |
|
|
VectorKind::U8 => {
|
|
self.expose_pass_array8_to_wasm()?;
|
|
"passArray8ToWasm"
|
|
}
|
|
VectorKind::U16 |
|
|
VectorKind::I16 => {
|
|
self.expose_pass_array16_to_wasm()?;
|
|
"passArray16ToWasm"
|
|
}
|
|
VectorKind::I32 |
|
|
VectorKind::U32 => {
|
|
self.expose_pass_array32_to_wasm()?;
|
|
"passArray32ToWasm"
|
|
}
|
|
VectorKind::I64 |
|
|
VectorKind::U64 => {
|
|
self.expose_pass_array64_to_wasm()?;
|
|
"passArray64ToWasm"
|
|
}
|
|
VectorKind::F32 => {
|
|
self.expose_pass_array_f32_to_wasm()?;
|
|
"passArrayF32ToWasm"
|
|
}
|
|
VectorKind::F64 => {
|
|
self.expose_pass_array_f64_to_wasm()?;
|
|
"passArrayF64ToWasm"
|
|
}
|
|
VectorKind::Anyref => {
|
|
bail!("cannot pass list of JsValue to wasm yet")
|
|
}
|
|
};
|
|
Ok(s)
|
|
}
|
|
|
|
fn expose_get_vector_from_wasm(&mut self, ty: VectorKind) -> &'static str {
|
|
match ty {
|
|
VectorKind::String => {
|
|
self.expose_get_string_from_wasm();
|
|
"getStringFromWasm"
|
|
}
|
|
VectorKind::I8 => {
|
|
self.expose_get_array_i8_from_wasm();
|
|
"getArrayI8FromWasm"
|
|
}
|
|
VectorKind::U8 => {
|
|
self.expose_get_array_u8_from_wasm();
|
|
"getArrayU8FromWasm"
|
|
}
|
|
VectorKind::I16 => {
|
|
self.expose_get_array_i16_from_wasm();
|
|
"getArrayI16FromWasm"
|
|
}
|
|
VectorKind::U16 => {
|
|
self.expose_get_array_u16_from_wasm();
|
|
"getArrayU16FromWasm"
|
|
}
|
|
VectorKind::I32 => {
|
|
self.expose_get_array_i32_from_wasm();
|
|
"getArrayI32FromWasm"
|
|
}
|
|
VectorKind::U32 => {
|
|
self.expose_get_array_u32_from_wasm();
|
|
"getArrayU32FromWasm"
|
|
}
|
|
VectorKind::I64 => {
|
|
self.expose_get_array_i64_from_wasm();
|
|
"getArrayI64FromWasm"
|
|
}
|
|
VectorKind::U64 => {
|
|
self.expose_get_array_u64_from_wasm();
|
|
"getArrayU64FromWasm"
|
|
}
|
|
VectorKind::F32 => {
|
|
self.expose_get_array_f32_from_wasm();
|
|
"getArrayF32FromWasm"
|
|
}
|
|
VectorKind::F64 => {
|
|
self.expose_get_array_f64_from_wasm();
|
|
"getArrayF64FromWasm"
|
|
}
|
|
VectorKind::Anyref => {
|
|
self.expose_get_array_js_value_from_wasm();
|
|
"getArrayJsValueFromWasm"
|
|
}
|
|
}
|
|
}
|
|
|
|
fn expose_get_global_argument(&mut self) -> Result<(), Error> {
|
|
if !self.exposed_globals.insert("get_global_argument") {
|
|
return Ok(());
|
|
}
|
|
self.expose_uint32_memory();
|
|
self.expose_global_argument_ptr()?;
|
|
self.global("
|
|
function getGlobalArgument(arg) {
|
|
const idx = globalArgumentPtr() / 4 + arg;
|
|
return getUint32Memory()[idx];
|
|
}
|
|
");
|
|
Ok(())
|
|
}
|
|
|
|
fn expose_global_argument_ptr(&mut self) -> Result<(), Error> {
|
|
if !self.exposed_globals.insert("global_argument_ptr") {
|
|
return Ok(());
|
|
}
|
|
self.require_internal_export("__wbindgen_global_argument_ptr")?;
|
|
self.global("
|
|
let cachedGlobalArgumentPtr = null;
|
|
function globalArgumentPtr() {
|
|
if (cachedGlobalArgumentPtr === null) {{
|
|
cachedGlobalArgumentPtr = wasm.__wbindgen_global_argument_ptr();
|
|
}}
|
|
return cachedGlobalArgumentPtr;
|
|
}
|
|
");
|
|
Ok(())
|
|
}
|
|
|
|
fn expose_get_inherited_descriptor(&mut self) {
|
|
if !self.exposed_globals.insert("get_inherited_descriptor") {
|
|
return
|
|
}
|
|
// It looks like while rare some browsers will move descriptors up the
|
|
// property chain which runs the risk of breaking wasm-bindgen-generated
|
|
// code because we're looking for precise descriptor functions rather
|
|
// than relying on the prototype chain like most "normal JS" projects
|
|
// do.
|
|
//
|
|
// As a result we have a small helper here which will walk the prototype
|
|
// chain looking for a descriptor. For some more information on this see
|
|
// #109
|
|
self.global("
|
|
function GetOwnOrInheritedPropertyDescriptor(obj, id) {
|
|
while (obj) {
|
|
let desc = Object.getOwnPropertyDescriptor(obj, id);
|
|
if (desc) return desc;
|
|
obj = Object.getPrototypeOf(obj);
|
|
}
|
|
throw new Error('descriptor not found');
|
|
}
|
|
");
|
|
}
|
|
|
|
fn expose_u32_cvt_shim(&mut self) -> &'static str {
|
|
let name = "u32CvtShim";
|
|
if !self.exposed_globals.insert(name) {
|
|
return name
|
|
}
|
|
self.global(&format!("const {} = new Uint32Array(2);", name));
|
|
name
|
|
}
|
|
|
|
fn expose_int64_cvt_shim(&mut self) -> &'static str {
|
|
let name = "int64CvtShim";
|
|
if !self.exposed_globals.insert(name) {
|
|
return name
|
|
}
|
|
let n = self.expose_u32_cvt_shim();
|
|
self.global(&format!("const {} = new BigInt64Array({}.buffer);", name, n));
|
|
name
|
|
}
|
|
|
|
fn expose_uint64_cvt_shim(&mut self) -> &'static str {
|
|
let name = "uint64CvtShim";
|
|
if !self.exposed_globals.insert(name) {
|
|
return name
|
|
}
|
|
let n = self.expose_u32_cvt_shim();
|
|
self.global(&format!("const {} = new BigUint64Array({}.buffer);", name, n));
|
|
name
|
|
}
|
|
|
|
fn gc(&mut self) -> Result<(), Error> {
|
|
let module = mem::replace(self.module, Module::default());
|
|
let wasm_bytes = parity_wasm::serialize(module)?;
|
|
let bytes = wasm_gc::Config::new()
|
|
.demangle(self.config.demangle)
|
|
.gc(&wasm_bytes)?;
|
|
*self.module = deserialize_buffer(&bytes)?;
|
|
Ok(())
|
|
}
|
|
|
|
fn describe(&self, name: &str) -> Option<Descriptor> {
|
|
let name = format!("__wbindgen_describe_{}", name);
|
|
(self.run_descriptor)(&name).map(|d| Descriptor::decode(&d))
|
|
}
|
|
|
|
fn global(&mut self, s: &str) {
|
|
let s = s;
|
|
let s = s.trim();
|
|
|
|
// Ensure a blank line between adjacent items, and ensure everything is
|
|
// terminated with a newline.
|
|
while !self.globals.ends_with("\n\n\n") && !self.globals.ends_with("*/\n") {
|
|
self.globals.push_str("\n");
|
|
}
|
|
self.globals.push_str(s);
|
|
self.globals.push_str("\n");
|
|
}
|
|
|
|
fn add_wasm_pack_section(&mut self) {
|
|
if self.module_versions.len() == 0 {
|
|
return
|
|
}
|
|
|
|
#[derive(Serialize)]
|
|
struct WasmPackSchema<'a> {
|
|
version: &'a str,
|
|
modules: &'a [(String, String)],
|
|
}
|
|
|
|
let contents = serde_json::to_string(&WasmPackSchema {
|
|
version: "0.0.1",
|
|
modules: &self.module_versions,
|
|
}).unwrap();
|
|
|
|
let mut section = CustomSection::default();
|
|
*section.name_mut() = "__wasm_pack_unstable".to_string();
|
|
*section.payload_mut() = contents.into_bytes();
|
|
self.module.sections_mut().push(Section::Custom(section));
|
|
}
|
|
}
|
|
|
|
impl<'a, 'b> SubContext<'a, 'b> {
|
|
pub fn generate(&mut self) -> Result<(), Error> {
|
|
for f in self.program.exports.iter() {
|
|
self.generate_export(f)
|
|
.with_context(|_| {
|
|
format!("failed to generate bindings for Rust export `{}`",
|
|
f.function.name)
|
|
})?;
|
|
}
|
|
for f in self.program.imports.iter() {
|
|
self.generate_import(f)?;
|
|
}
|
|
for e in self.program.enums.iter() {
|
|
self.generate_enum(e);
|
|
}
|
|
for s in self.program.structs.iter() {
|
|
let mut class = self.cx.exported_classes
|
|
.entry(s.name.clone())
|
|
.or_insert_with(Default::default);
|
|
class.comments = format_doc_comments(&s.comments);
|
|
class.fields
|
|
.extend(s.fields.iter().map(|f| {
|
|
ClassField {
|
|
name: f.name.clone(),
|
|
readonly: f.readonly,
|
|
comments: format_doc_comments(&f.comments),
|
|
}
|
|
}));
|
|
}
|
|
|
|
Ok(())
|
|
}
|
|
|
|
fn generate_export(&mut self, export: &shared::Export)
|
|
-> Result<(), Error>
|
|
{
|
|
if let Some(ref class) = export.class {
|
|
return self.generate_export_for_class(class, export);
|
|
}
|
|
|
|
let descriptor = match self.cx.describe(&export.function.name) {
|
|
None => return Ok(()),
|
|
Some(d) => d,
|
|
};
|
|
|
|
let (js, ts) = Js2Rust::new(&export.function.name, self.cx)
|
|
.process(descriptor.unwrap_function())?
|
|
.finish("function", &format!("wasm.{}", export.function.name));
|
|
self.cx.export(&export.function.name, &js, Some(format_doc_comments(&export.comments)));
|
|
self.cx.globals.push_str("\n");
|
|
self.cx.typescript.push_str("export ");
|
|
self.cx.typescript.push_str(&ts);
|
|
self.cx.typescript.push_str("\n");
|
|
Ok(())
|
|
}
|
|
|
|
fn generate_export_for_class(
|
|
&mut self,
|
|
class_name: &str,
|
|
export: &shared::Export,
|
|
) -> Result<(), Error> {
|
|
let wasm_name = shared::struct_function_export_name(class_name, &export.function.name);
|
|
|
|
let descriptor = match self.cx.describe(&wasm_name) {
|
|
None => return Ok(()),
|
|
Some(d) => d,
|
|
};
|
|
|
|
let (js, ts) = Js2Rust::new(&export.function.name, self.cx)
|
|
.method(export.method)
|
|
.process(descriptor.unwrap_function())?
|
|
.finish("", &format!("wasm.{}", wasm_name));
|
|
let class = self.cx.exported_classes.entry(class_name.to_string())
|
|
.or_insert(ExportedClass::default());
|
|
class.contents.push_str(&format_doc_comments(&export.comments));
|
|
if !export.method {
|
|
class.contents.push_str("static ");
|
|
class.typescript.push_str("static ");
|
|
}
|
|
|
|
let constructors: Vec<String> = self.program.exports
|
|
.iter()
|
|
.filter(|x| x.class == Some(class_name.to_string()))
|
|
.filter_map(|x| x.constructor.clone())
|
|
.collect();
|
|
|
|
class.constructor = match constructors.len() {
|
|
0 => None,
|
|
1 => Some(constructors[0].clone()),
|
|
x @ _ => bail!("there must be only one constructor, not {}", x),
|
|
};
|
|
class.contents.push_str(&export.function.name);
|
|
class.contents.push_str(&js);
|
|
class.contents.push_str("\n");
|
|
class.typescript.push_str(&ts);
|
|
class.typescript.push_str("\n");
|
|
Ok(())
|
|
}
|
|
|
|
fn generate_import(&mut self, import: &shared::Import) -> Result<(), Error> {
|
|
self.validate_import_module(import)?;
|
|
match import.kind {
|
|
shared::ImportKind::Function(ref f) => {
|
|
self.generate_import_function(import, f)
|
|
.with_context(|_| {
|
|
format!("failed to generate bindings for JS import `{}`",
|
|
f.function.name)
|
|
})?;
|
|
}
|
|
shared::ImportKind::Static(ref s) => {
|
|
self.generate_import_static(import, s)
|
|
.with_context(|_| {
|
|
format!("failed to generate bindings for JS import `{}`",
|
|
s.name)
|
|
})?;
|
|
}
|
|
shared::ImportKind::Type(_) => {}
|
|
}
|
|
Ok(())
|
|
}
|
|
|
|
fn validate_import_module(&mut self, import: &shared::Import)
|
|
-> Result<(), Error>
|
|
{
|
|
let version = match import.version {
|
|
Some(ref s) => s,
|
|
None => return Ok(()),
|
|
};
|
|
let module = match import.module {
|
|
Some(ref s) => s,
|
|
None => return Ok(()),
|
|
};
|
|
if module.starts_with("./") {
|
|
return Ok(())
|
|
}
|
|
let pkg = if module.starts_with("@") {
|
|
// Translate `@foo/bar/baz` to `@foo/bar` and `@foo/bar` to itself
|
|
let first_slash = match module.find('/') {
|
|
Some(i) => i,
|
|
None => {
|
|
bail!("packages starting with `@` must be of the form \
|
|
`@foo/bar`, but found: `{}`", module)
|
|
}
|
|
};
|
|
match module[first_slash + 1..].find('/') {
|
|
Some(i) => &module[..i],
|
|
None => module,
|
|
}
|
|
} else {
|
|
module.split('/').next().unwrap()
|
|
};
|
|
self.cx.module_versions.push((pkg.to_string(), version.clone()));
|
|
Ok(())
|
|
}
|
|
|
|
fn generate_import_static(
|
|
&mut self,
|
|
info: &shared::Import,
|
|
import: &shared::ImportStatic,
|
|
)
|
|
-> Result<(), Error>
|
|
{
|
|
// TODO: should support more types to import here
|
|
let obj = self.import_name(info, &import.name)?;
|
|
self.cx.expose_add_heap_object();
|
|
self.cx.export(&import.shim, &format!("
|
|
function() {{
|
|
return addHeapObject({});
|
|
}}
|
|
", obj), None);
|
|
Ok(())
|
|
}
|
|
|
|
fn generate_import_function(&mut self,
|
|
info: &shared::Import,
|
|
import: &shared::ImportFunction)
|
|
-> Result<(), Error>
|
|
{
|
|
let descriptor = match self.cx.describe(&import.shim) {
|
|
None => return Ok(()),
|
|
Some(d) => d,
|
|
};
|
|
|
|
let target = match &import.method {
|
|
Some(shared::MethodData { class, kind, getter, setter }) => {
|
|
let class = self.import_name(info, class)?;
|
|
if let shared::MethodKind::Constructor = kind {
|
|
format!("new {}", class)
|
|
} else {
|
|
let is_static = if let shared::MethodKind::Static = kind {
|
|
true
|
|
} else {
|
|
false
|
|
};
|
|
|
|
let target = if let Some(g) = getter {
|
|
if import.structural {
|
|
format!("function(y) {{
|
|
return this.{};
|
|
}}", g)
|
|
} else {
|
|
self.cx.expose_get_inherited_descriptor();
|
|
format!(
|
|
"GetOwnOrInheritedPropertyDescriptor\
|
|
({}{}, '{}').get",
|
|
class,
|
|
if is_static { "" } else { ".prototype "},
|
|
g,
|
|
)
|
|
}
|
|
} else if let Some(s) = setter {
|
|
if import.structural {
|
|
format!("function(y) {{
|
|
this.{} = y;
|
|
}}", s)
|
|
} else {
|
|
self.cx.expose_get_inherited_descriptor();
|
|
format!(
|
|
"GetOwnOrInheritedPropertyDescriptor\
|
|
({}{}, '{}').set",
|
|
class,
|
|
if is_static { "" } else { ".prototype "},
|
|
s,
|
|
)
|
|
}
|
|
} else {
|
|
if import.structural {
|
|
let nargs = descriptor.unwrap_function().arguments.len();
|
|
let mut s = format!("function(");
|
|
for i in 0..nargs - 1 {
|
|
if i > 0 {
|
|
drop(write!(s, ", "));
|
|
}
|
|
drop(write!(s, "x{}", i));
|
|
}
|
|
s.push_str(") { \nreturn this.");
|
|
s.push_str(&import.function.name);
|
|
s.push_str("(");
|
|
for i in 0..nargs - 1 {
|
|
if i > 0 {
|
|
drop(write!(s, ", "));
|
|
}
|
|
drop(write!(s, "x{}", i));
|
|
}
|
|
s.push_str(");\n}");
|
|
s
|
|
} else {
|
|
format!("{}{}.{}", class, if is_static { "" } else { ".prototype" }, import.function.name)
|
|
}
|
|
};
|
|
self.cx.global(&format!("
|
|
const {}_target = {};
|
|
", import.shim, target));
|
|
format!("{}_target{}", import.shim, if is_static { "" } else { ".call" })
|
|
}
|
|
}
|
|
None => {
|
|
let name = self.import_name(info, &import.function.name)?;
|
|
if name.contains(".") {
|
|
self.cx.global(&format!("
|
|
const {}_target = {};
|
|
", import.shim, name));
|
|
format!("{}_target", import.shim)
|
|
} else {
|
|
name
|
|
}
|
|
}
|
|
};
|
|
|
|
let js = Rust2Js::new(self.cx)
|
|
.catch(import.catch)
|
|
.process(descriptor.unwrap_function())?
|
|
.finish(&target);
|
|
self.cx.export(&import.shim, &js, None);
|
|
Ok(())
|
|
}
|
|
|
|
fn generate_enum(&mut self, enum_: &shared::Enum) {
|
|
let mut variants = String::new();
|
|
|
|
for variant in enum_.variants.iter() {
|
|
variants.push_str(&format!("{}:{},", variant.name, variant.value));
|
|
}
|
|
self.cx.export(&enum_.name, &format!("Object.freeze({{ {} }})", variants), Some(format_doc_comments(&enum_.comments)));
|
|
self.cx.typescript.push_str(&format!("export enum {} {{", enum_.name));
|
|
|
|
variants.clear();
|
|
for variant in enum_.variants.iter() {
|
|
variants.push_str(&format!("{},", variant.name));
|
|
}
|
|
self.cx.typescript.push_str(&variants);
|
|
self.cx.typescript.push_str("}\n");
|
|
}
|
|
|
|
fn import_name(&mut self, import: &shared::Import, item: &str)
|
|
-> Result<String, Error>
|
|
{
|
|
if let Some(ref module) = import.module {
|
|
if self.cx.config.no_modules {
|
|
bail!("import from `{}` module not allowed with `--no-modules`; \
|
|
use `--nodejs` or `--browser` instead", module);
|
|
}
|
|
|
|
let name = import.js_namespace.as_ref().map(|s| &**s).unwrap_or(item);
|
|
|
|
if self.cx.imported_names.insert(name.to_string()) {
|
|
if self.cx.config.nodejs {
|
|
self.cx.imports.push_str(&format!("\
|
|
const {} = require('{}').{};\n\
|
|
", name, module, name));
|
|
} else {
|
|
self.cx.imports.push_str(&format!("\
|
|
import {{ {} }} from '{}';\n\
|
|
", name, module));
|
|
}
|
|
}
|
|
}
|
|
Ok(match import.js_namespace {
|
|
Some(ref s) => format!("{}.{}", s, item),
|
|
None => item.to_string(),
|
|
})
|
|
}
|
|
}
|
|
|
|
fn format_doc_comments(comments: &Vec<String>) -> String {
|
|
let body: String = comments.iter().map(|c| format!("*{}\n", c.trim_matches('"'))).collect();
|
|
format!("/**\n{}*/\n", body)
|
|
} |