units-impl-wasm.js

const units = require("./units.lib.js");

export function setupUnits() {
  globalThis.printBuffer = "";

  window.convertPromise = units({
    "print": function(out) {
      globalThis.printBuffer += out + "\n";
    }
  }).then((Module) => {
    let _do_a_conversion = Module.cwrap("do_a_conversion", "number", [
      "number",
      "number",
      "number",
    ]);

    async function convert(from, to = "", system="si") {
      let from_c = Module.stringToNewUTF8(from);
      let to_c = Module.stringToNewUTF8(to);
      let sys_c = Module.stringToNewUTF8(system);
      let lenBefore = globalThis.printBuffer.length;
      _do_a_conversion(from_c, to === "" ? 0 : to_c, system);
      return globalThis.printBuffer.slice(lenBefore).trim();
    }

    window.convert = convert;

    return convert;
});
}