src/deterministic.js

// Copyright 2014 The Emscripten Authors.  All rights reserved.
// Emscripten is available under two separate licenses, the MIT license and the
// University of Illinois/NCSA Open Source License.  Both these licenses can be
// found in the LICENSE file.

var MAGIC = 0;
Math.random = function() {
  MAGIC = Math.pow(MAGIC + 1.8912, 3) % 1;
  return MAGIC;
};
var TIME = 10000;
Date.now = function() {
  return TIME++;
};
if (typeof performance === 'object') performance.now = Date.now;

if (!Module) Module = {};
Module['thisProgram'] = 'thisProgram'; // for consistency between different builds than between runs of the same build

function hashMemory(id) {
  var ret = 0;
  var len = HEAP32[DYNAMICTOP_PTR>>2];
  for (var i = 0; i < len; i++) {
    ret = (ret*17 + HEAPU8[i])|0;
  }
  return id + ':' + ret;
}

function hashString(s) {
  var ret = 0;
  for (var i = 0; i < s.length; i++) {
    ret = (ret*17 + s.charCodeAt(i))|0;
  }
  return ret;
}