@thi.ng/wasm-api/memory.js

Generic, modular, extensible API bridge and infrastructure for hybrid JS & WebAssembly projects

const __instanceArray = (type, addr, num, size = type.size) => {
  const items = [];
  for (; num-- > 0; addr += size) items.push(type.instance(addr));
  return items;
};
const __array = (mem, ctor, addr, len) => __instanceArray(ctor(mem), addr, len);
const __slice32 = (mem, ctor, offset) => {
  return __array(
    mem,
    ctor,
    mem.u32[offset >>> 2],
    mem.u32[offset + 4 >>> 2]
  );
};
const __slice64 = (mem, ctor, offset) => {
  return __array(
    mem,
    ctor,
    Number(mem.u64[offset >>> 3]),
    Number(mem.u64[offset + 8 >>> 3])
  );
};
const __primslice32 = (mem, view, offset, shift) => {
  const addr = mem.u32[offset >>> 2] >>> shift;
  const len = mem.u32[offset + 4 >>> 2];
  return view.subarray(addr, addr + len);
};
const __primslice64 = (mem, view, offset, shift) => {
  const addr = Number(mem.u64[offset >>> 3]) >>> shift;
  const len = Number(mem.u64[offset + 8 >>> 3]);
  return view.subarray(addr, addr + len);
};
export {
  __array,
  __instanceArray,
  __primslice32,
  __primslice64,
  __slice32,
  __slice64
};