assemblyscript/std/portable/heap.js

var globalScope = typeof window !== "undefined" && window || typeof global !== "undefined" && global || self;

var HEAP = new Uint8Array(0);
var HEAP_OFFSET = 0;

globalScope["allocate_memory"] =
function allocate_memory(size) {
  if (!(size >>>= 0))
    return 0;
  if (HEAP_OFFSET + size > HEAP.length) {
    var oldHeap = HEAP;
    HEAP = new Uint8Array(Math.max(65536, HEAP.length + size, HEAP.length * 2));
    HEAP.set(oldHeap);
  }
  var ptr = HEAP_OFFSET;
  if ((HEAP_OFFSET += size) & 7)
    HEAP_OFFSET = (HEAP_OFFSET | 7) + 1;
  return ptr;
};

globalScope["free_memory"] =
function free_memory(ptr) {
  // TODO
};

globalScope["move_memory"] =
function move_memory(dest, src, n) {
  HEAP.copyWithin(dest, src, src + n);
};

globalScope["store"] =
function store(ptr, val, off) {
  if (typeof off === "number")
    ptr += off;
  HEAP[ptr] = val;
};

globalScope["load"] =
function load(ptr) {
  if (typeof off === "number")
    ptr += off;
  return HEAP[ptr];
};