moar stuff

codecs/oxipng/src/lib.rs

@@ -35,14 +35,6 @@ cfg_if! {
 //   }
 // }
 
-pub fn rust_wasm_syscall(index: usize, _data: *mut ()) -> usize {
-  if index == 6 {
-    1
-  } else {
-    0
-  }
-}
-
 #[wasm_bindgen]
 pub fn doit() -> u32 {
   let start = Instant::now();

codecs/oxipng/tmp/lib.rs

@@ -1,10 +1,14 @@
 extern crate wasm_bindgen;
 
 use wasm_bindgen::prelude::*;
-use std::time::{Instant};
+use std::thread::spawn;
 
 #[wasm_bindgen]
-pub fn doit() -> u32 {
-  let start = Instant::now();
-  start.elapsed().as_secs() as u32
+pub fn doit() {
+  // let child = spawn(move || -> u32 {
+  //   5
+  // });
+  // let result = child.join().unwrap();
+  let result = spawn();
+  println!("Result: {}", result);
 }

codecs/oxipng/tmp/lol.js

@@ -0,0 +1,47 @@
+// const oxipng = require("./oxipng_wasm");
+const repl = require("repl");
+const fs = require("fs");
+
+const dec = new TextDecoder();
+let buffer = '';
+async function init() {
+  const { instance } = await WebAssembly.instantiate(
+    fs.readFileSync("./target/wasm32-unknown-unknown/release/loltest.wasm"),
+    {
+      __wbindgen_placeholder__: {
+        __wbindgen_describe(v) {
+          console.log(`__wbindgen_desribe(${v})`);
+        }
+      },
+      env: {
+        // See https://github.com/rust-lang/rust/blob/master/src/libstd/sys/wasm/mod.rs
+        rust_wasm_syscall(syscall, ptr) {
+          switch(syscall) {
+            case 1: // Write
+              const [fd, dataPtr, len] = new Uint32Array(instance.exports.memory.buffer, ptr, 3 * 4);
+              const fragment = new Uint8Array(instance.exports.memory.buffer, dataPtr, len);
+              buffer += dec.decode(fragment);
+              const idx = buffer.indexOf('\n');
+              if(idx !== -1) {
+                console.log(buffer.slice(0, idx));
+                buffer = buffer.slice(idx);
+              }
+              return 1;
+            case 6: // Time
+              return 1;
+            default:
+              return 0; // False, unimplemented
+          }
+        }
+      }
+    }
+  );
+
+  try {
+    instance.exports.doit();
+  } catch{}
+  const r = repl.start("node> ");
+  r.context.i = instance;
+}
+
+init();