More cleanup

src/glue/js/binaryen.js

@@ -0,0 +1,52 @@
+// Copy Binaryen exports to global scope
+
+const binaryen = global.Binaryen || require("binaryen");
+
+for (var key in binaryen)
+  if (key.startsWith("_Binaryen") || key.startsWith("_Relooper"))
+    global[key] = binaryen[key];
+
+// Utilize Binaryen's heap
+
+global.allocate_memory = function(size) {
+  if (!size) return 0; // should be safe in our case
+  return binaryen._malloc(size);
+};
+
+global.free_memory = function(ptr) {
+  if (ptr) binaryen._free(ptr);
+};
+
+global.move_memory = function(dest, src, n) {
+  return binaryen._memmove(dest, src, n);
+};
+
+global.store = function(ptr, val) {
+  binaryen.HEAPU8[ptr] = val;
+};
+
+global.load = function(ptr) {
+  return binaryen.HEAPU8[ptr];
+};
+
+// Implement module stubs
+
+const Module = require("../../module").Module;
+
+Module.prototype.toText = function toText() {
+  var previousPrint = binaryen.print;
+  var ret = "";
+  binaryen.print = function(x) { ret += x + "\n" };
+  _BinaryenModulePrint(this.ref);
+  binaryen.print = previousPrint;
+  return ret;
+};
+
+Module.prototype.toAsmjs = function toAsmjs() {
+  var previousPrint = binaryen.print;
+  var ret = "";
+  binaryen.print = function(x) { ret += x + "\n" };
+  _BinaryenModulePrintAsmjs(this.ref);
+  binaryen.print = previousPrint;
+  return ret;
+};