snake.js

// include: shell.js
// The Module object: Our interface to the outside world. We import
// and export values on it. There are various ways Module can be used:
// 1. Not defined. We create it here
// 2. A function parameter, function(Module) { ..generated code.. }
// 3. pre-run appended it, var Module = {}; ..generated code..
// 4. External script tag defines var Module.
// We need to check if Module already exists (e.g. case 3 above).
// Substitution will be replaced with actual code on later stage of the build,
// this way Closure Compiler will not mangle it (e.g. case 4. above).
// Note that if you want to run closure, and also to use Module
// after the generated code, you will need to define   var Module = {};
// before the code. Then that object will be used in the code, and you
// can continue to use Module afterwards as well.
var Module = typeof Module != 'undefined' ? Module : {};

// --pre-jses are emitted after the Module integration code, so that they can
// refer to Module (if they choose; they can also define Module)


// Sometimes an existing Module object exists with properties
// meant to overwrite the default module functionality. Here
// we collect those properties and reapply _after_ we configure
// the current environment's defaults to avoid having to be so
// defensive during initialization.
var moduleOverrides = Object.assign({}, Module);

var arguments_ = [];
var thisProgram = './this.program';
var quit_ = (status, toThrow) => {
  throw toThrow;
};

// Determine the runtime environment we are in. You can customize this by
// setting the ENVIRONMENT setting at compile time (see settings.js).

// Attempt to auto-detect the environment
var ENVIRONMENT_IS_WEB = typeof window == 'object';
var ENVIRONMENT_IS_WORKER = typeof importScripts == 'function';
// N.b. Electron.js environment is simultaneously a NODE-environment, but
// also a web environment.
var ENVIRONMENT_IS_NODE = typeof process == 'object' && typeof process.versions == 'object' && typeof process.versions.node == 'string';
var ENVIRONMENT_IS_SHELL = !ENVIRONMENT_IS_WEB && !ENVIRONMENT_IS_NODE && !ENVIRONMENT_IS_WORKER;

if (Module['ENVIRONMENT']) {
  throw new Error('Module.ENVIRONMENT has been deprecated. To force the environment, use the ENVIRONMENT compile-time option (for example, -sENVIRONMENT=web or -sENVIRONMENT=node)');
}

// `/` should be present at the end if `scriptDirectory` is not empty
var scriptDirectory = '';
function locateFile(path) {
  if (Module['locateFile']) {
    return Module['locateFile'](path, scriptDirectory);
  }
  return scriptDirectory + path;
}

// Hooks that are implemented differently in different runtime environments.
var read_,
    readAsync,
    readBinary,
    setWindowTitle;

if (ENVIRONMENT_IS_NODE) {
  if (typeof process == 'undefined' || !process.release || process.release.name !== 'node') throw new Error('not compiled for this environment (did you build to HTML and try to run it not on the web, or set ENVIRONMENT to something - like node - and run it someplace else - like on the web?)');

  var nodeVersion = process.versions.node;
  var numericVersion = nodeVersion.split('.').slice(0, 3);
  numericVersion = (numericVersion[0] * 10000) + (numericVersion[1] * 100) + (numericVersion[2].split('-')[0] * 1);
  var minVersion = 160000;
  if (numericVersion < 160000) {
    throw new Error('This emscripten-generated code requires node v16.0.0 (detected v' + nodeVersion + ')');
  }

  // `require()` is no-op in an ESM module, use `createRequire()` to construct
  // the require()` function.  This is only necessary for multi-environment
  // builds, `-sENVIRONMENT=node` emits a static import declaration instead.
  // TODO: Swap all `require()`'s with `import()`'s?
  // These modules will usually be used on Node.js. Load them eagerly to avoid
  // the complexity of lazy-loading.
  var fs = require('fs');
  var nodePath = require('path');

  if (ENVIRONMENT_IS_WORKER) {
    scriptDirectory = nodePath.dirname(scriptDirectory) + '/';
  } else {
    scriptDirectory = __dirname + '/';
  }

// include: node_shell_read.js
read_ = (filename, binary) => {
  // We need to re-wrap `file://` strings to URLs. Normalizing isn't
  // necessary in that case, the path should already be absolute.
  filename = isFileURI(filename) ? new URL(filename) : nodePath.normalize(filename);
  return fs.readFileSync(filename, binary ? undefined : 'utf8');
};

readBinary = (filename) => {
  var ret = read_(filename, true);
  if (!ret.buffer) {
    ret = new Uint8Array(ret);
  }
  assert(ret.buffer);
  return ret;
};

readAsync = (filename, onload, onerror, binary = true) => {
  // See the comment in the `read_` function.
  filename = isFileURI(filename) ? new URL(filename) : nodePath.normalize(filename);
  fs.readFile(filename, binary ? undefined : 'utf8', (err, data) => {
    if (err) onerror(err);
    else onload(binary ? data.buffer : data);
  });
};
// end include: node_shell_read.js
  if (!Module['thisProgram'] && process.argv.length > 1) {
    thisProgram = process.argv[1].replace(/\\/g, '/');
  }

  arguments_ = process.argv.slice(2);

  if (typeof module != 'undefined') {
    module['exports'] = Module;
  }

  process.on('uncaughtException', (ex) => {
    // suppress ExitStatus exceptions from showing an error
    if (ex !== 'unwind' && !(ex instanceof ExitStatus) && !(ex.context instanceof ExitStatus)) {
      throw ex;
    }
  });

  quit_ = (status, toThrow) => {
    process.exitCode = status;
    throw toThrow;
  };

  Module['inspect'] = () => '[Emscripten Module object]';

} else
if (ENVIRONMENT_IS_SHELL) {

  if ((typeof process == 'object' && typeof require === 'function') || typeof window == 'object' || typeof importScripts == 'function') throw new Error('not compiled for this environment (did you build to HTML and try to run it not on the web, or set ENVIRONMENT to something - like node - and run it someplace else - like on the web?)');

  if (typeof read != 'undefined') {
    read_ = (f) => {
      return read(f);
    };
  }

  readBinary = (f) => {
    let data;
    if (typeof readbuffer == 'function') {
      return new Uint8Array(readbuffer(f));
    }
    data = read(f, 'binary');
    assert(typeof data == 'object');
    return data;
  };

  readAsync = (f, onload, onerror) => {
    setTimeout(() => onload(readBinary(f)));
  };

  if (typeof clearTimeout == 'undefined') {
    globalThis.clearTimeout = (id) => {};
  }

  if (typeof setTimeout == 'undefined') {
    // spidermonkey lacks setTimeout but we use it above in readAsync.
    globalThis.setTimeout = (f) => (typeof f == 'function') ? f() : abort();
  }

  if (typeof scriptArgs != 'undefined') {
    arguments_ = scriptArgs;
  } else if (typeof arguments != 'undefined') {
    arguments_ = arguments;
  }

  if (typeof quit == 'function') {
    quit_ = (status, toThrow) => {
      // Unlike node which has process.exitCode, d8 has no such mechanism. So we
      // have no way to set the exit code and then let the program exit with
      // that code when it naturally stops running (say, when all setTimeouts
      // have completed). For that reason, we must call `quit` - the only way to
      // set the exit code - but quit also halts immediately.  To increase
      // consistency with node (and the web) we schedule the actual quit call
      // using a setTimeout to give the current stack and any exception handlers
      // a chance to run.  This enables features such as addOnPostRun (which
      // expected to be able to run code after main returns).
      setTimeout(() => {
        if (!(toThrow instanceof ExitStatus)) {
          let toLog = toThrow;
          if (toThrow && typeof toThrow == 'object' && toThrow.stack) {
            toLog = [toThrow, toThrow.stack];
          }
          err(`exiting due to exception: ${toLog}`);
        }
        quit(status);
      });
      throw toThrow;
    };
  }

  if (typeof print != 'undefined') {
    // Prefer to use print/printErr where they exist, as they usually work better.
    if (typeof console == 'undefined') console = /** @type{!Console} */({});
    console.log = /** @type{!function(this:Console, ...*): undefined} */ (print);
    console.warn = console.error = /** @type{!function(this:Console, ...*): undefined} */ (typeof printErr != 'undefined' ? printErr : print);
  }

} else

// Note that this includes Node.js workers when relevant (pthreads is enabled).
// Node.js workers are detected as a combination of ENVIRONMENT_IS_WORKER and
// ENVIRONMENT_IS_NODE.
if (ENVIRONMENT_IS_WEB || ENVIRONMENT_IS_WORKER) {
  if (ENVIRONMENT_IS_WORKER) { // Check worker, not web, since window could be polyfilled
    scriptDirectory = self.location.href;
  } else if (typeof document != 'undefined' && document.currentScript) { // web
    scriptDirectory = document.currentScript.src;
  }
  // blob urls look like blob:http://site.com/etc/etc and we cannot infer anything from them.
  // otherwise, slice off the final part of the url to find the script directory.
  // if scriptDirectory does not contain a slash, lastIndexOf will return -1,
  // and scriptDirectory will correctly be replaced with an empty string.
  // If scriptDirectory contains a query (starting with ?) or a fragment (starting with #),
  // they are removed because they could contain a slash.
  if (scriptDirectory.indexOf('blob:') !== 0) {
    scriptDirectory = scriptDirectory.substr(0, scriptDirectory.replace(/[?#].*/, "").lastIndexOf('/')+1);
  } else {
    scriptDirectory = '';
  }

  if (!(typeof window == 'object' || typeof importScripts == 'function')) throw new Error('not compiled for this environment (did you build to HTML and try to run it not on the web, or set ENVIRONMENT to something - like node - and run it someplace else - like on the web?)');

  // Differentiate the Web Worker from the Node Worker case, as reading must
  // be done differently.
  {
// include: web_or_worker_shell_read.js
read_ = (url) => {
      var xhr = new XMLHttpRequest();
      xhr.open('GET', url, false);
      xhr.send(null);
      return xhr.responseText;
  }

  if (ENVIRONMENT_IS_WORKER) {
    readBinary = (url) => {
        var xhr = new XMLHttpRequest();
        xhr.open('GET', url, false);
        xhr.responseType = 'arraybuffer';
        xhr.send(null);
        return new Uint8Array(/** @type{!ArrayBuffer} */(xhr.response));
    };
  }

  readAsync = (url, onload, onerror) => {
    var xhr = new XMLHttpRequest();
    xhr.open('GET', url, true);
    xhr.responseType = 'arraybuffer';
    xhr.onload = () => {
      if (xhr.status == 200 || (xhr.status == 0 && xhr.response)) { // file URLs can return 0
        onload(xhr.response);
        return;
      }
      onerror();
    };
    xhr.onerror = onerror;
    xhr.send(null);
  }

// end include: web_or_worker_shell_read.js
  }

  setWindowTitle = (title) => document.title = title;
} else
{
  throw new Error('environment detection error');
}

var out = Module['print'] || console.log.bind(console);
var err = Module['printErr'] || console.error.bind(console);

// Merge back in the overrides
Object.assign(Module, moduleOverrides);
// Free the object hierarchy contained in the overrides, this lets the GC
// reclaim data used e.g. in memoryInitializerRequest, which is a large typed array.
moduleOverrides = null;
checkIncomingModuleAPI();

// Emit code to handle expected values on the Module object. This applies Module.x
// to the proper local x. This has two benefits: first, we only emit it if it is
// expected to arrive, and second, by using a local everywhere else that can be
// minified.

if (Module['arguments']) arguments_ = Module['arguments'];legacyModuleProp('arguments', 'arguments_');

if (Module['thisProgram']) thisProgram = Module['thisProgram'];legacyModuleProp('thisProgram', 'thisProgram');

if (Module['quit']) quit_ = Module['quit'];legacyModuleProp('quit', 'quit_');

// perform assertions in shell.js after we set up out() and err(), as otherwise if an assertion fails it cannot print the message
// Assertions on removed incoming Module JS APIs.
assert(typeof Module['memoryInitializerPrefixURL'] == 'undefined', 'Module.memoryInitializerPrefixURL option was removed, use Module.locateFile instead');
assert(typeof Module['pthreadMainPrefixURL'] == 'undefined', 'Module.pthreadMainPrefixURL option was removed, use Module.locateFile instead');
assert(typeof Module['cdInitializerPrefixURL'] == 'undefined', 'Module.cdInitializerPrefixURL option was removed, use Module.locateFile instead');
assert(typeof Module['filePackagePrefixURL'] == 'undefined', 'Module.filePackagePrefixURL option was removed, use Module.locateFile instead');
assert(typeof Module['read'] == 'undefined', 'Module.read option was removed (modify read_ in JS)');
assert(typeof Module['readAsync'] == 'undefined', 'Module.readAsync option was removed (modify readAsync in JS)');
assert(typeof Module['readBinary'] == 'undefined', 'Module.readBinary option was removed (modify readBinary in JS)');
assert(typeof Module['setWindowTitle'] == 'undefined', 'Module.setWindowTitle option was removed (modify setWindowTitle in JS)');
assert(typeof Module['TOTAL_MEMORY'] == 'undefined', 'Module.TOTAL_MEMORY has been renamed Module.INITIAL_MEMORY');
legacyModuleProp('read', 'read_');
legacyModuleProp('readAsync', 'readAsync');
legacyModuleProp('readBinary', 'readBinary');
legacyModuleProp('setWindowTitle', 'setWindowTitle');
var IDBFS = 'IDBFS is no longer included by default; build with -lidbfs.js';
var PROXYFS = 'PROXYFS is no longer included by default; build with -lproxyfs.js';
var WORKERFS = 'WORKERFS is no longer included by default; build with -lworkerfs.js';
var NODEFS = 'NODEFS is no longer included by default; build with -lnodefs.js';

assert(!ENVIRONMENT_IS_SHELL, "shell environment detected but not enabled at build time.  Add 'shell' to `-sENVIRONMENT` to enable.");


// end include: shell.js
// include: preamble.js
// === Preamble library stuff ===

// Documentation for the public APIs defined in this file must be updated in:
//    site/source/docs/api_reference/preamble.js.rst
// A prebuilt local version of the documentation is available at:
//    site/build/text/docs/api_reference/preamble.js.txt
// You can also build docs locally as HTML or other formats in site/
// An online HTML version (which may be of a different version of Emscripten)
//    is up at http://kripken.github.io/emscripten-site/docs/api_reference/preamble.js.html

var wasmBinary;
if (Module['wasmBinary']) wasmBinary = Module['wasmBinary'];legacyModuleProp('wasmBinary', 'wasmBinary');
var noExitRuntime = Module['noExitRuntime'] || true;legacyModuleProp('noExitRuntime', 'noExitRuntime');

if (typeof WebAssembly != 'object') {
  abort('no native wasm support detected');
}

// Wasm globals

var wasmMemory;

//========================================
// Runtime essentials
//========================================

// whether we are quitting the application. no code should run after this.
// set in exit() and abort()
var ABORT = false;

// set by exit() and abort().  Passed to 'onExit' handler.
// NOTE: This is also used as the process return code code in shell environments
// but only when noExitRuntime is false.
var EXITSTATUS;

/** @type {function(*, string=)} */
function assert(condition, text) {
  if (!condition) {
    abort('Assertion failed' + (text ? ': ' + text : ''));
  }
}

// We used to include malloc/free by default in the past. Show a helpful error in
// builds with assertions.
function _free() {
  // Show a helpful error since we used to include free by default in the past.
  abort("free() called but not included in the build - add '_free' to EXPORTED_FUNCTIONS");
}

// Memory management

var HEAP,
/** @type {!Int8Array} */
  HEAP8,
/** @type {!Uint8Array} */
  HEAPU8,
/** @type {!Int16Array} */
  HEAP16,
/** @type {!Uint16Array} */
  HEAPU16,
/** @type {!Int32Array} */
  HEAP32,
/** @type {!Uint32Array} */
  HEAPU32,
/** @type {!Float32Array} */
  HEAPF32,
/** @type {!Float64Array} */
  HEAPF64;

function updateMemoryViews() {
  var b = wasmMemory.buffer;
  Module['HEAP8'] = HEAP8 = new Int8Array(b);
  Module['HEAP16'] = HEAP16 = new Int16Array(b);
  Module['HEAP32'] = HEAP32 = new Int32Array(b);
  Module['HEAPU8'] = HEAPU8 = new Uint8Array(b);
  Module['HEAPU16'] = HEAPU16 = new Uint16Array(b);
  Module['HEAPU32'] = HEAPU32 = new Uint32Array(b);
  Module['HEAPF32'] = HEAPF32 = new Float32Array(b);
  Module['HEAPF64'] = HEAPF64 = new Float64Array(b);
}

assert(!Module['STACK_SIZE'], 'STACK_SIZE can no longer be set at runtime.  Use -sSTACK_SIZE at link time')

assert(typeof Int32Array != 'undefined' && typeof Float64Array !== 'undefined' && Int32Array.prototype.subarray != undefined && Int32Array.prototype.set != undefined,
       'JS engine does not provide full typed array support');

// If memory is defined in wasm, the user can't provide it, or set INITIAL_MEMORY
assert(!Module['wasmMemory'], 'Use of `wasmMemory` detected.  Use -sIMPORTED_MEMORY to define wasmMemory externally');
assert(!Module['INITIAL_MEMORY'], 'Detected runtime INITIAL_MEMORY setting.  Use -sIMPORTED_MEMORY to define wasmMemory dynamically');

// include: runtime_init_table.js
// In regular non-RELOCATABLE mode the table is exported
// from the wasm module and this will be assigned once
// the exports are available.
var wasmTable;
// end include: runtime_init_table.js
// include: runtime_stack_check.js
// Initializes the stack cookie. Called at the startup of main and at the startup of each thread in pthreads mode.
function writeStackCookie() {
  var max = _emscripten_stack_get_end();
  assert((max & 3) == 0);
  // If the stack ends at address zero we write our cookies 4 bytes into the
  // stack.  This prevents interference with SAFE_HEAP and ASAN which also
  // monitor writes to address zero.
  if (max == 0) {
    max += 4;
  }
  // The stack grow downwards towards _emscripten_stack_get_end.
  // We write cookies to the final two words in the stack and detect if they are
  // ever overwritten.
  HEAPU32[((max)>>2)] = 0x02135467;
  HEAPU32[(((max)+(4))>>2)] = 0x89BACDFE;
  // Also test the global address 0 for integrity.
  HEAPU32[((0)>>2)] = 1668509029;
}

function checkStackCookie() {
  if (ABORT) return;
  var max = _emscripten_stack_get_end();
  // See writeStackCookie().
  if (max == 0) {
    max += 4;
  }
  var cookie1 = HEAPU32[((max)>>2)];
  var cookie2 = HEAPU32[(((max)+(4))>>2)];
  if (cookie1 != 0x02135467 || cookie2 != 0x89BACDFE) {
    abort(`Stack overflow! Stack cookie has been overwritten at ${ptrToString(max)}, expected hex dwords 0x89BACDFE and 0x2135467, but received ${ptrToString(cookie2)} ${ptrToString(cookie1)}`);
  }
  // Also test the global address 0 for integrity.
  if (HEAPU32[((0)>>2)] != 0x63736d65 /* 'emsc' */) {
    abort('Runtime error: The application has corrupted its heap memory area (address zero)!');
  }
}
// end include: runtime_stack_check.js
// include: runtime_assertions.js
// Endianness check
(function() {
  var h16 = new Int16Array(1);
  var h8 = new Int8Array(h16.buffer);
  h16[0] = 0x6373;
  if (h8[0] !== 0x73 || h8[1] !== 0x63) throw 'Runtime error: expected the system to be little-endian! (Run with -sSUPPORT_BIG_ENDIAN to bypass)';
})();

// end include: runtime_assertions.js
var __ATPRERUN__  = []; // functions called before the runtime is initialized
var __ATINIT__    = []; // functions called during startup
var __ATMAIN__    = []; // functions called when main() is to be run
var __ATEXIT__    = []; // functions called during shutdown
var __ATPOSTRUN__ = []; // functions called after the main() is called

var runtimeInitialized = false;

var runtimeKeepaliveCounter = 0;

function keepRuntimeAlive() {
  return noExitRuntime || runtimeKeepaliveCounter > 0;
}

function preRun() {
  if (Module['preRun']) {
    if (typeof Module['preRun'] == 'function') Module['preRun'] = [Module['preRun']];
    while (Module['preRun'].length) {
      addOnPreRun(Module['preRun'].shift());
    }
  }
  callRuntimeCallbacks(__ATPRERUN__);
}

function initRuntime() {
  assert(!runtimeInitialized);
  runtimeInitialized = true;

  checkStackCookie();

  
if (!Module["noFSInit"] && !FS.init.initialized)
  FS.init();
FS.ignorePermissions = false;

TTY.init();
  callRuntimeCallbacks(__ATINIT__);
}

function preMain() {
  checkStackCookie();
  
  callRuntimeCallbacks(__ATMAIN__);
}

function postRun() {
  checkStackCookie();

  if (Module['postRun']) {
    if (typeof Module['postRun'] == 'function') Module['postRun'] = [Module['postRun']];
    while (Module['postRun'].length) {
      addOnPostRun(Module['postRun'].shift());
    }
  }

  callRuntimeCallbacks(__ATPOSTRUN__);
}

function addOnPreRun(cb) {
  __ATPRERUN__.unshift(cb);
}

function addOnInit(cb) {
  __ATINIT__.unshift(cb);
}

function addOnPreMain(cb) {
  __ATMAIN__.unshift(cb);
}

function addOnExit(cb) {
}

function addOnPostRun(cb) {
  __ATPOSTRUN__.unshift(cb);
}

// include: runtime_math.js
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/imul

// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/fround

// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/clz32

// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc

assert(Math.imul, 'This browser does not support Math.imul(), build with LEGACY_VM_SUPPORT or POLYFILL_OLD_MATH_FUNCTIONS to add in a polyfill');
assert(Math.fround, 'This browser does not support Math.fround(), build with LEGACY_VM_SUPPORT or POLYFILL_OLD_MATH_FUNCTIONS to add in a polyfill');
assert(Math.clz32, 'This browser does not support Math.clz32(), build with LEGACY_VM_SUPPORT or POLYFILL_OLD_MATH_FUNCTIONS to add in a polyfill');
assert(Math.trunc, 'This browser does not support Math.trunc(), build with LEGACY_VM_SUPPORT or POLYFILL_OLD_MATH_FUNCTIONS to add in a polyfill');
// end include: runtime_math.js
// A counter of dependencies for calling run(). If we need to
// do asynchronous work before running, increment this and
// decrement it. Incrementing must happen in a place like
// Module.preRun (used by emcc to add file preloading).
// Note that you can add dependencies in preRun, even though
// it happens right before run - run will be postponed until
// the dependencies are met.
var runDependencies = 0;
var runDependencyWatcher = null;
var dependenciesFulfilled = null; // overridden to take different actions when all run dependencies are fulfilled
var runDependencyTracking = {};

function getUniqueRunDependency(id) {
  var orig = id;
  while (1) {
    if (!runDependencyTracking[id]) return id;
    id = orig + Math.random();
  }
}

function addRunDependency(id) {
  runDependencies++;

  if (Module['monitorRunDependencies']) {
    Module['monitorRunDependencies'](runDependencies);
  }

  if (id) {
    assert(!runDependencyTracking[id]);
    runDependencyTracking[id] = 1;
    if (runDependencyWatcher === null && typeof setInterval != 'undefined') {
      // Check for missing dependencies every few seconds
      runDependencyWatcher = setInterval(() => {
        if (ABORT) {
          clearInterval(runDependencyWatcher);
          runDependencyWatcher = null;
          return;
        }
        var shown = false;
        for (var dep in runDependencyTracking) {
          if (!shown) {
            shown = true;
            err('still waiting on run dependencies:');
          }
          err('dependency: ' + dep);
        }
        if (shown) {
          err('(end of list)');
        }
      }, 10000);
    }
  } else {
    err('warning: run dependency added without ID');
  }
}

function removeRunDependency(id) {
  runDependencies--;

  if (Module['monitorRunDependencies']) {
    Module['monitorRunDependencies'](runDependencies);
  }

  if (id) {
    assert(runDependencyTracking[id]);
    delete runDependencyTracking[id];
  } else {
    err('warning: run dependency removed without ID');
  }
  if (runDependencies == 0) {
    if (runDependencyWatcher !== null) {
      clearInterval(runDependencyWatcher);
      runDependencyWatcher = null;
    }
    if (dependenciesFulfilled) {
      var callback = dependenciesFulfilled;
      dependenciesFulfilled = null;
      callback(); // can add another dependenciesFulfilled
    }
  }
}

/** @param {string|number=} what */
function abort(what) {
  if (Module['onAbort']) {
    Module['onAbort'](what);
  }

  what = 'Aborted(' + what + ')';
  // TODO(sbc): Should we remove printing and leave it up to whoever
  // catches the exception?
  err(what);

  ABORT = true;
  EXITSTATUS = 1;

  // Use a wasm runtime error, because a JS error might be seen as a foreign
  // exception, which means we'd run destructors on it. We need the error to
  // simply make the program stop.
  // FIXME This approach does not work in Wasm EH because it currently does not assume
  // all RuntimeErrors are from traps; it decides whether a RuntimeError is from
  // a trap or not based on a hidden field within the object. So at the moment
  // we don't have a way of throwing a wasm trap from JS. TODO Make a JS API that
  // allows this in the wasm spec.

  // Suppress closure compiler warning here. Closure compiler's builtin extern
  // defintion for WebAssembly.RuntimeError claims it takes no arguments even
  // though it can.
  // TODO(https://github.com/google/closure-compiler/pull/3913): Remove if/when upstream closure gets fixed.
  /** @suppress {checkTypes} */
  var e = new WebAssembly.RuntimeError(what);

  // Throw the error whether or not MODULARIZE is set because abort is used
  // in code paths apart from instantiation where an exception is expected
  // to be thrown when abort is called.
  throw e;
}

// include: memoryprofiler.js
// end include: memoryprofiler.js
// include: URIUtils.js
// Prefix of data URIs emitted by SINGLE_FILE and related options.
var dataURIPrefix = 'data:application/octet-stream;base64,';

// Indicates whether filename is a base64 data URI.
function isDataURI(filename) {
  // Prefix of data URIs emitted by SINGLE_FILE and related options.
  return filename.startsWith(dataURIPrefix);
}

// Indicates whether filename is delivered via file protocol (as opposed to http/https)
function isFileURI(filename) {
  return filename.startsWith('file://');
}
// end include: URIUtils.js
/** @param {boolean=} fixedasm */
function createExportWrapper(name, fixedasm) {
  return function() {
    var displayName = name;
    var asm = fixedasm;
    if (!fixedasm) {
      asm = Module['asm'];
    }
    assert(runtimeInitialized, 'native function `' + displayName + '` called before runtime initialization');
    if (!asm[name]) {
      assert(asm[name], 'exported native function `' + displayName + '` not found');
    }
    return asm[name].apply(null, arguments);
  };
}

// include: runtime_exceptions.js
// end include: runtime_exceptions.js
var wasmBinaryFile;
  wasmBinaryFile = 'snake.wasm';
  if (!isDataURI(wasmBinaryFile)) {
    wasmBinaryFile = locateFile(wasmBinaryFile);
  }

function getBinary(file) {
  try {
    if (file == wasmBinaryFile && wasmBinary) {
      return new Uint8Array(wasmBinary);
    }
    if (readBinary) {
      return readBinary(file);
    }
    throw "both async and sync fetching of the wasm failed";
  }
  catch (err) {
    abort(err);
  }
}

function getBinaryPromise(binaryFile) {
  // If we don't have the binary yet, try to load it asynchronously.
  // Fetch has some additional restrictions over XHR, like it can't be used on a file:// url.
  // See https://github.com/github/fetch/pull/92#issuecomment-140665932
  // Cordova or Electron apps are typically loaded from a file:// url.
  // So use fetch if it is available and the url is not a file, otherwise fall back to XHR.
  if (!wasmBinary && (ENVIRONMENT_IS_WEB || ENVIRONMENT_IS_WORKER)) {
    if (typeof fetch == 'function'
      && !isFileURI(binaryFile)
    ) {
      return fetch(binaryFile, { credentials: 'same-origin' }).then((response) => {
        if (!response['ok']) {
          throw "failed to load wasm binary file at '" + binaryFile + "'";
        }
        return response['arrayBuffer']();
      }).catch(() => getBinary(binaryFile));
    }
    else {
      if (readAsync) {
        // fetch is not available or url is file => try XHR (readAsync uses XHR internally)
        return new Promise((resolve, reject) => {
          readAsync(binaryFile, (response) => resolve(new Uint8Array(/** @type{!ArrayBuffer} */(response))), reject)
        });
      }
    }
  }

  // Otherwise, getBinary should be able to get it synchronously
  return Promise.resolve().then(() => getBinary(binaryFile));
}

function instantiateArrayBuffer(binaryFile, imports, receiver) {
  return getBinaryPromise(binaryFile).then((binary) => {
    return WebAssembly.instantiate(binary, imports);
  }).then((instance) => {
    return instance;
  }).then(receiver, (reason) => {
    err('failed to asynchronously prepare wasm: ' + reason);

    // Warn on some common problems.
    if (isFileURI(wasmBinaryFile)) {
      err('warning: Loading from a file URI (' + wasmBinaryFile + ') is not supported in most browsers. See https://emscripten.org/docs/getting_started/FAQ.html#how-do-i-run-a-local-webserver-for-testing-why-does-my-program-stall-in-downloading-or-preparing');
    }
    abort(reason);
  });
}

function instantiateAsync(binary, binaryFile, imports, callback) {
  if (!binary &&
      typeof WebAssembly.instantiateStreaming == 'function' &&
      !isDataURI(binaryFile) &&
      // Don't use streaming for file:// delivered objects in a webview, fetch them synchronously.
      !isFileURI(binaryFile) &&
      // Avoid instantiateStreaming() on Node.js environment for now, as while
      // Node.js v18.1.0 implements it, it does not have a full fetch()
      // implementation yet.
      //
      // Reference:
      //   https://github.com/emscripten-core/emscripten/pull/16917
      !ENVIRONMENT_IS_NODE &&
      typeof fetch == 'function') {
    return fetch(binaryFile, { credentials: 'same-origin' }).then((response) => {
      // Suppress closure warning here since the upstream definition for
      // instantiateStreaming only allows Promise<Repsponse> rather than
      // an actual Response.
      // TODO(https://github.com/google/closure-compiler/pull/3913): Remove if/when upstream closure is fixed.
      /** @suppress {checkTypes} */
      var result = WebAssembly.instantiateStreaming(response, imports);

      return result.then(
        callback,
        function(reason) {
          // We expect the most common failure cause to be a bad MIME type for the binary,
          // in which case falling back to ArrayBuffer instantiation should work.
          err('wasm streaming compile failed: ' + reason);
          err('falling back to ArrayBuffer instantiation');
          return instantiateArrayBuffer(binaryFile, imports, callback);
        });
    });
  } else {
    return instantiateArrayBuffer(binaryFile, imports, callback);
  }
}

// Create the wasm instance.
// Receives the wasm imports, returns the exports.
function createWasm() {
  // prepare imports
  var info = {
    'env': wasmImports,
    'wasi_snapshot_preview1': wasmImports,
  };
  // Load the wasm module and create an instance of using native support in the JS engine.
  // handle a generated wasm instance, receiving its exports and
  // performing other necessary setup
  /** @param {WebAssembly.Module=} module*/
  function receiveInstance(instance, module) {
    var exports = instance.exports;

    Module['asm'] = exports;

    wasmMemory = Module['asm']['memory'];
    assert(wasmMemory, "memory not found in wasm exports");
    // This assertion doesn't hold when emscripten is run in --post-link
    // mode.
    // TODO(sbc): Read INITIAL_MEMORY out of the wasm file in post-link mode.
    //assert(wasmMemory.buffer.byteLength === 16777216);
    updateMemoryViews();

    wasmTable = Module['asm']['__indirect_function_table'];
    assert(wasmTable, "table not found in wasm exports");

    addOnInit(Module['asm']['__wasm_call_ctors']);

    removeRunDependency('wasm-instantiate');
    return exports;
  }
  // wait for the pthread pool (if any)
  addRunDependency('wasm-instantiate');

  // Prefer streaming instantiation if available.
  // Async compilation can be confusing when an error on the page overwrites Module
  // (for example, if the order of elements is wrong, and the one defining Module is
  // later), so we save Module and check it later.
  var trueModule = Module;
  function receiveInstantiationResult(result) {
    // 'result' is a ResultObject object which has both the module and instance.
    // receiveInstance() will swap in the exports (to Module.asm) so they can be called
    assert(Module === trueModule, 'the Module object should not be replaced during async compilation - perhaps the order of HTML elements is wrong?');
    trueModule = null;
    // TODO: Due to Closure regression https://github.com/google/closure-compiler/issues/3193, the above line no longer optimizes out down to the following line.
    // When the regression is fixed, can restore the above PTHREADS-enabled path.
    receiveInstance(result['instance']);
  }

  // User shell pages can write their own Module.instantiateWasm = function(imports, successCallback) callback
  // to manually instantiate the Wasm module themselves. This allows pages to
  // run the instantiation parallel to any other async startup actions they are
  // performing.
  // Also pthreads and wasm workers initialize the wasm instance through this
  // path.
  if (Module['instantiateWasm']) {

    try {
      return Module['instantiateWasm'](info, receiveInstance);
    } catch(e) {
      err('Module.instantiateWasm callback failed with error: ' + e);
        return false;
    }
  }

  instantiateAsync(wasmBinary, wasmBinaryFile, info, receiveInstantiationResult);
  return {}; // no exports yet; we'll fill them in later
}

// Globals used by JS i64 conversions (see makeSetValue)
var tempDouble;
var tempI64;

// include: runtime_debug.js
function legacyModuleProp(prop, newName) {
  if (!Object.getOwnPropertyDescriptor(Module, prop)) {
    Object.defineProperty(Module, prop, {
      configurable: true,
      get: function() {
        abort('Module.' + prop + ' has been replaced with plain ' + newName + ' (the initial value can be provided on Module, but after startup the value is only looked for on a local variable of that name)');
      }
    });
  }
}

function ignoredModuleProp(prop) {
  if (Object.getOwnPropertyDescriptor(Module, prop)) {
    abort('`Module.' + prop + '` was supplied but `' + prop + '` not included in INCOMING_MODULE_JS_API');
  }
}

// forcing the filesystem exports a few things by default
function isExportedByForceFilesystem(name) {
  return name === 'FS_createPath' ||
         name === 'FS_createDataFile' ||
         name === 'FS_createPreloadedFile' ||
         name === 'FS_unlink' ||
         name === 'addRunDependency' ||
         // The old FS has some functionality that WasmFS lacks.
         name === 'FS_createLazyFile' ||
         name === 'FS_createDevice' ||
         name === 'removeRunDependency';
}

function missingGlobal(sym, msg) {
  if (typeof globalThis !== 'undefined') {
    Object.defineProperty(globalThis, sym, {
      configurable: true,
      get: function() {
        warnOnce('`' + sym + '` is not longer defined by emscripten. ' + msg);
        return undefined;
      }
    });
  }
}

missingGlobal('buffer', 'Please use HEAP8.buffer or wasmMemory.buffer');

function missingLibrarySymbol(sym) {
  if (typeof globalThis !== 'undefined' && !Object.getOwnPropertyDescriptor(globalThis, sym)) {
    Object.defineProperty(globalThis, sym, {
      configurable: true,
      get: function() {
        // Can't `abort()` here because it would break code that does runtime
        // checks.  e.g. `if (typeof SDL === 'undefined')`.
        var msg = '`' + sym + '` is a library symbol and not included by default; add it to your library.js __deps or to DEFAULT_LIBRARY_FUNCS_TO_INCLUDE on the command line';
        // DEFAULT_LIBRARY_FUNCS_TO_INCLUDE requires the name as it appears in
        // library.js, which means $name for a JS name with no prefix, or name
        // for a JS name like _name.
        var librarySymbol = sym;
        if (!librarySymbol.startsWith('_')) {
          librarySymbol = '$' + sym;
        }
        msg += " (e.g. -sDEFAULT_LIBRARY_FUNCS_TO_INCLUDE='" + librarySymbol + "')";
        if (isExportedByForceFilesystem(sym)) {
          msg += '. Alternatively, forcing filesystem support (-sFORCE_FILESYSTEM) can export this for you';
        }
        warnOnce(msg);
        return undefined;
      }
    });
  }
  // Any symbol that is not included from the JS libary is also (by definition)
  // not exported on the Module object.
  unexportedRuntimeSymbol(sym);
}

function unexportedRuntimeSymbol(sym) {
  if (!Object.getOwnPropertyDescriptor(Module, sym)) {
    Object.defineProperty(Module, sym, {
      configurable: true,
      get: function() {
        var msg = "'" + sym + "' was not exported. add it to EXPORTED_RUNTIME_METHODS (see the FAQ)";
        if (isExportedByForceFilesystem(sym)) {
          msg += '. Alternatively, forcing filesystem support (-sFORCE_FILESYSTEM) can export this for you';
        }
        abort(msg);
      }
    });
  }
}

// Used by XXXXX_DEBUG settings to output debug messages.
function dbg(text) {
  // TODO(sbc): Make this configurable somehow.  Its not always convenient for
  // logging to show up as warnings.
  console.warn.apply(console, arguments);
}
// end include: runtime_debug.js
// === Body ===

var ASM_CONSTS = {
  125064: () => { if (typeof(AudioContext) !== 'undefined') { return true; } else if (typeof(webkitAudioContext) !== 'undefined') { return true; } return false; },  
 125211: () => { if ((typeof(navigator.mediaDevices) !== 'undefined') && (typeof(navigator.mediaDevices.getUserMedia) !== 'undefined')) { return true; } else if (typeof(navigator.webkitGetUserMedia) !== 'undefined') { return true; } return false; },  
 125445: ($0) => { if(typeof(Module['SDL2']) === 'undefined') { Module['SDL2'] = {}; } var SDL2 = Module['SDL2']; if (!$0) { SDL2.audio = {}; } else { SDL2.capture = {}; } if (!SDL2.audioContext) { if (typeof(AudioContext) !== 'undefined') { SDL2.audioContext = new AudioContext(); } else if (typeof(webkitAudioContext) !== 'undefined') { SDL2.audioContext = new webkitAudioContext(); } if (SDL2.audioContext) { autoResumeAudioContext(SDL2.audioContext); } } return SDL2.audioContext === undefined ? -1 : 0; },  
 125938: () => { var SDL2 = Module['SDL2']; return SDL2.audioContext.sampleRate; },  
 126006: ($0, $1, $2, $3) => { var SDL2 = Module['SDL2']; var have_microphone = function(stream) { if (SDL2.capture.silenceTimer !== undefined) { clearTimeout(SDL2.capture.silenceTimer); SDL2.capture.silenceTimer = undefined; } SDL2.capture.mediaStreamNode = SDL2.audioContext.createMediaStreamSource(stream); SDL2.capture.scriptProcessorNode = SDL2.audioContext.createScriptProcessor($1, $0, 1); SDL2.capture.scriptProcessorNode.onaudioprocess = function(audioProcessingEvent) { if ((SDL2 === undefined) || (SDL2.capture === undefined)) { return; } audioProcessingEvent.outputBuffer.getChannelData(0).fill(0.0); SDL2.capture.currentCaptureBuffer = audioProcessingEvent.inputBuffer; dynCall('vi', $2, [$3]); }; SDL2.capture.mediaStreamNode.connect(SDL2.capture.scriptProcessorNode); SDL2.capture.scriptProcessorNode.connect(SDL2.audioContext.destination); SDL2.capture.stream = stream; }; var no_microphone = function(error) { }; SDL2.capture.silenceBuffer = SDL2.audioContext.createBuffer($0, $1, SDL2.audioContext.sampleRate); SDL2.capture.silenceBuffer.getChannelData(0).fill(0.0); var silence_callback = function() { SDL2.capture.currentCaptureBuffer = SDL2.capture.silenceBuffer; dynCall('vi', $2, [$3]); }; SDL2.capture.silenceTimer = setTimeout(silence_callback, ($1 / SDL2.audioContext.sampleRate) * 1000); if ((navigator.mediaDevices !== undefined) && (navigator.mediaDevices.getUserMedia !== undefined)) { navigator.mediaDevices.getUserMedia({ audio: true, video: false }).then(have_microphone).catch(no_microphone); } else if (navigator.webkitGetUserMedia !== undefined) { navigator.webkitGetUserMedia({ audio: true, video: false }, have_microphone, no_microphone); } },  
 127658: ($0, $1, $2, $3) => { var SDL2 = Module['SDL2']; SDL2.audio.scriptProcessorNode = SDL2.audioContext['createScriptProcessor']($1, 0, $0); SDL2.audio.scriptProcessorNode['onaudioprocess'] = function (e) { if ((SDL2 === undefined) || (SDL2.audio === undefined)) { return; } SDL2.audio.currentOutputBuffer = e['outputBuffer']; dynCall('vi', $2, [$3]); }; SDL2.audio.scriptProcessorNode['connect'](SDL2.audioContext['destination']); },  
 128068: ($0, $1) => { var SDL2 = Module['SDL2']; var numChannels = SDL2.capture.currentCaptureBuffer.numberOfChannels; for (var c = 0; c < numChannels; ++c) { var channelData = SDL2.capture.currentCaptureBuffer.getChannelData(c); if (channelData.length != $1) { throw 'Web Audio capture buffer length mismatch! Destination size: ' + channelData.length + ' samples vs expected ' + $1 + ' samples!'; } if (numChannels == 1) { for (var j = 0; j < $1; ++j) { setValue($0 + (j * 4), channelData[j], 'float'); } } else { for (var j = 0; j < $1; ++j) { setValue($0 + (((j * numChannels) + c) * 4), channelData[j], 'float'); } } } },  
 128673: ($0, $1) => { var SDL2 = Module['SDL2']; var numChannels = SDL2.audio.currentOutputBuffer['numberOfChannels']; for (var c = 0; c < numChannels; ++c) { var channelData = SDL2.audio.currentOutputBuffer['getChannelData'](c); if (channelData.length != $1) { throw 'Web Audio output buffer length mismatch! Destination size: ' + channelData.length + ' samples vs expected ' + $1 + ' samples!'; } for (var j = 0; j < $1; ++j) { channelData[j] = HEAPF32[$0 + ((j*numChannels + c) << 2) >> 2]; } } },  
 129153: ($0) => { var SDL2 = Module['SDL2']; if ($0) { if (SDL2.capture.silenceTimer !== undefined) { clearTimeout(SDL2.capture.silenceTimer); } if (SDL2.capture.stream !== undefined) { var tracks = SDL2.capture.stream.getAudioTracks(); for (var i = 0; i < tracks.length; i++) { SDL2.capture.stream.removeTrack(tracks[i]); } SDL2.capture.stream = undefined; } if (SDL2.capture.scriptProcessorNode !== undefined) { SDL2.capture.scriptProcessorNode.onaudioprocess = function(audioProcessingEvent) {}; SDL2.capture.scriptProcessorNode.disconnect(); SDL2.capture.scriptProcessorNode = undefined; } if (SDL2.capture.mediaStreamNode !== undefined) { SDL2.capture.mediaStreamNode.disconnect(); SDL2.capture.mediaStreamNode = undefined; } if (SDL2.capture.silenceBuffer !== undefined) { SDL2.capture.silenceBuffer = undefined } SDL2.capture = undefined; } else { if (SDL2.audio.scriptProcessorNode != undefined) { SDL2.audio.scriptProcessorNode.disconnect(); SDL2.audio.scriptProcessorNode = undefined; } SDL2.audio = undefined; } if ((SDL2.audioContext !== undefined) && (SDL2.audio === undefined) && (SDL2.capture === undefined)) { SDL2.audioContext.close(); SDL2.audioContext = undefined; } },  
 130325: ($0, $1, $2) => { var w = $0; var h = $1; var pixels = $2; if (!Module['SDL2']) Module['SDL2'] = {}; var SDL2 = Module['SDL2']; if (SDL2.ctxCanvas !== Module['canvas']) { SDL2.ctx = Module['createContext'](Module['canvas'], false, true); SDL2.ctxCanvas = Module['canvas']; } if (SDL2.w !== w || SDL2.h !== h || SDL2.imageCtx !== SDL2.ctx) { SDL2.image = SDL2.ctx.createImageData(w, h); SDL2.w = w; SDL2.h = h; SDL2.imageCtx = SDL2.ctx; } var data = SDL2.image.data; var src = pixels >> 2; var dst = 0; var num; if (typeof CanvasPixelArray !== 'undefined' && data instanceof CanvasPixelArray) { num = data.length; while (dst < num) { var val = HEAP32[src]; data[dst ] = val & 0xff; data[dst+1] = (val >> 8) & 0xff; data[dst+2] = (val >> 16) & 0xff; data[dst+3] = 0xff; src++; dst += 4; } } else { if (SDL2.data32Data !== data) { SDL2.data32 = new Int32Array(data.buffer); SDL2.data8 = new Uint8Array(data.buffer); SDL2.data32Data = data; } var data32 = SDL2.data32; num = data32.length; data32.set(HEAP32.subarray(src, src + num)); var data8 = SDL2.data8; var i = 3; var j = i + 4*num; if (num % 8 == 0) { while (i < j) { data8[i] = 0xff; i = i + 4 | 0; data8[i] = 0xff; i = i + 4 | 0; data8[i] = 0xff; i = i + 4 | 0; data8[i] = 0xff; i = i + 4 | 0; data8[i] = 0xff; i = i + 4 | 0; data8[i] = 0xff; i = i + 4 | 0; data8[i] = 0xff; i = i + 4 | 0; data8[i] = 0xff; i = i + 4 | 0; } } else { while (i < j) { data8[i] = 0xff; i = i + 4 | 0; } } } SDL2.ctx.putImageData(SDL2.image, 0, 0); },  
 131794: ($0, $1, $2, $3, $4) => { var w = $0; var h = $1; var hot_x = $2; var hot_y = $3; var pixels = $4; var canvas = document.createElement("canvas"); canvas.width = w; canvas.height = h; var ctx = canvas.getContext("2d"); var image = ctx.createImageData(w, h); var data = image.data; var src = pixels >> 2; var dst = 0; var num; if (typeof CanvasPixelArray !== 'undefined' && data instanceof CanvasPixelArray) { num = data.length; while (dst < num) { var val = HEAP32[src]; data[dst ] = val & 0xff; data[dst+1] = (val >> 8) & 0xff; data[dst+2] = (val >> 16) & 0xff; data[dst+3] = (val >> 24) & 0xff; src++; dst += 4; } } else { var data32 = new Int32Array(data.buffer); num = data32.length; data32.set(HEAP32.subarray(src, src + num)); } ctx.putImageData(image, 0, 0); var url = hot_x === 0 && hot_y === 0 ? "url(" + canvas.toDataURL() + "), auto" : "url(" + canvas.toDataURL() + ") " + hot_x + " " + hot_y + ", auto"; var urlBuf = _malloc(url.length + 1); stringToUTF8(url, urlBuf, url.length + 1); return urlBuf; },  
 132783: ($0) => { if (Module['canvas']) { Module['canvas'].style['cursor'] = UTF8ToString($0); } },  
 132866: () => { if (Module['canvas']) { Module['canvas'].style['cursor'] = 'none'; } },  
 132935: () => { return window.innerWidth; },  
 132965: () => { return window.innerHeight; }
};


// end include: preamble.js

  /** @constructor */
  function ExitStatus(status) {
      this.name = 'ExitStatus';
      this.message = `Program terminated with exit(${status})`;
      this.status = status;
    }

  var listenOnce = (object, event, func) => {
      object.addEventListener(event, func, { 'once': true });
    };
  /** @param {Object=} elements */
  var autoResumeAudioContext = (ctx, elements) => {
      if (!elements) {
        elements = [document, document.getElementById('canvas')];
      }
      ['keydown', 'mousedown', 'touchstart'].forEach((event) => {
        elements.forEach((element) => {
          if (element) {
            listenOnce(element, event, () => {
              if (ctx.state === 'suspended') ctx.resume();
            });
          }
        });
      });
    };

  var callRuntimeCallbacks = (callbacks) => {
      while (callbacks.length > 0) {
        // Pass the module as the first argument.
        callbacks.shift()(Module);
      }
    };

  var dynCallLegacy = (sig, ptr, args) => {
      assert(('dynCall_' + sig) in Module, `bad function pointer type - dynCall function not found for sig '${sig}'`);
      if (args && args.length) {
        // j (64-bit integer) must be passed in as two numbers [low 32, high 32].
        assert(args.length === sig.substring(1).replace(/j/g, '--').length);
      } else {
        assert(sig.length == 1);
      }
      var f = Module['dynCall_' + sig];
      return args && args.length ? f.apply(null, [ptr].concat(args)) : f.call(null, ptr);
    };
  
  var wasmTableMirror = [];
  var getWasmTableEntry = (funcPtr) => {
      var func = wasmTableMirror[funcPtr];
      if (!func) {
        if (funcPtr >= wasmTableMirror.length) wasmTableMirror.length = funcPtr + 1;
        wasmTableMirror[funcPtr] = func = wasmTable.get(funcPtr);
      }
      assert(wasmTable.get(funcPtr) == func, "JavaScript-side Wasm function table mirror is out of date!");
      return func;
    };
  
  /** @param {Object=} args */
  var dynCall = (sig, ptr, args) => {
      // Without WASM_BIGINT support we cannot directly call function with i64 as
      // part of thier signature, so we rely the dynCall functions generated by
      // wasm-emscripten-finalize
      if (sig.includes('j')) {
        return dynCallLegacy(sig, ptr, args);
      }
      assert(getWasmTableEntry(ptr), `missing table entry in dynCall: ${ptr}`);
      var rtn = getWasmTableEntry(ptr).apply(null, args);
      return rtn;
  
    };

  
    /**
     * @param {number} ptr
     * @param {string} type
     */
  function getValue(ptr, type = 'i8') {
    if (type.endsWith('*')) type = '*';
    switch (type) {
      case 'i1': return HEAP8[((ptr)>>0)];
      case 'i8': return HEAP8[((ptr)>>0)];
      case 'i16': return HEAP16[((ptr)>>1)];
      case 'i32': return HEAP32[((ptr)>>2)];
      case 'i64': abort('to do getValue(i64) use WASM_BIGINT');
      case 'float': return HEAPF32[((ptr)>>2)];
      case 'double': return HEAPF64[((ptr)>>3)];
      case '*': return HEAPU32[((ptr)>>2)];
      default: abort(`invalid type for getValue: ${type}`);
    }
  }

  var ptrToString = (ptr) => {
      assert(typeof ptr === 'number');
      return '0x' + ptr.toString(16).padStart(8, '0');
    };

  
    /**
     * @param {number} ptr
     * @param {number} value
     * @param {string} type
     */
  function setValue(ptr, value, type = 'i8') {
    if (type.endsWith('*')) type = '*';
    switch (type) {
      case 'i1': HEAP8[((ptr)>>0)] = value; break;
      case 'i8': HEAP8[((ptr)>>0)] = value; break;
      case 'i16': HEAP16[((ptr)>>1)] = value; break;
      case 'i32': HEAP32[((ptr)>>2)] = value; break;
      case 'i64': abort('to do setValue(i64) use WASM_BIGINT');
      case 'float': HEAPF32[((ptr)>>2)] = value; break;
      case 'double': HEAPF64[((ptr)>>3)] = value; break;
      case '*': HEAPU32[((ptr)>>2)] = value; break;
      default: abort(`invalid type for setValue: ${type}`);
    }
  }

  var warnOnce = (text) => {
      if (!warnOnce.shown) warnOnce.shown = {};
      if (!warnOnce.shown[text]) {
        warnOnce.shown[text] = 1;
        if (ENVIRONMENT_IS_NODE) text = 'warning: ' + text;
        err(text);
      }
    };

  var setErrNo = (value) => {
      HEAP32[((___errno_location())>>2)] = value;
      return value;
    };
  
  var PATH = {isAbs:(path) => path.charAt(0) === '/',splitPath:(filename) => {
        var splitPathRe = /^(\/?|)([\s\S]*?)((?:\.{1,2}|[^\/]+?|)(\.[^.\/]*|))(?:[\/]*)$/;
        return splitPathRe.exec(filename).slice(1);
      },normalizeArray:(parts, allowAboveRoot) => {
        // if the path tries to go above the root, `up` ends up > 0
        var up = 0;
        for (var i = parts.length - 1; i >= 0; i--) {
          var last = parts[i];
          if (last === '.') {
            parts.splice(i, 1);
          } else if (last === '..') {
            parts.splice(i, 1);
            up++;
          } else if (up) {
            parts.splice(i, 1);
            up--;
          }
        }
        // if the path is allowed to go above the root, restore leading ..s
        if (allowAboveRoot) {
          for (; up; up--) {
            parts.unshift('..');
          }
        }
        return parts;
      },normalize:(path) => {
        var isAbsolute = PATH.isAbs(path),
            trailingSlash = path.substr(-1) === '/';
        // Normalize the path
        path = PATH.normalizeArray(path.split('/').filter((p) => !!p), !isAbsolute).join('/');
        if (!path && !isAbsolute) {
          path = '.';
        }
        if (path && trailingSlash) {
          path += '/';
        }
        return (isAbsolute ? '/' : '') + path;
      },dirname:(path) => {
        var result = PATH.splitPath(path),
            root = result[0],
            dir = result[1];
        if (!root && !dir) {
          // No dirname whatsoever
          return '.';
        }
        if (dir) {
          // It has a dirname, strip trailing slash
          dir = dir.substr(0, dir.length - 1);
        }
        return root + dir;
      },basename:(path) => {
        // EMSCRIPTEN return '/'' for '/', not an empty string
        if (path === '/') return '/';
        path = PATH.normalize(path);
        path = path.replace(/\/$/, "");
        var lastSlash = path.lastIndexOf('/');
        if (lastSlash === -1) return path;
        return path.substr(lastSlash+1);
      },join:function() {
        var paths = Array.prototype.slice.call(arguments);
        return PATH.normalize(paths.join('/'));
      },join2:(l, r) => {
        return PATH.normalize(l + '/' + r);
      }};
  
  var initRandomFill = () => {
      if (typeof crypto == 'object' && typeof crypto['getRandomValues'] == 'function') {
        // for modern web browsers
        return (view) => crypto.getRandomValues(view);
      } else
      if (ENVIRONMENT_IS_NODE) {
        // for nodejs with or without crypto support included
        try {
          var crypto_module = require('crypto');
          var randomFillSync = crypto_module['randomFillSync'];
          if (randomFillSync) {
            // nodejs with LTS crypto support
            return (view) => crypto_module['randomFillSync'](view);
          }
          // very old nodejs with the original crypto API
          var randomBytes = crypto_module['randomBytes'];
          return (view) => (
            view.set(randomBytes(view.byteLength)),
            // Return the original view to match modern native implementations.
            view
          );
        } catch (e) {
          // nodejs doesn't have crypto support
        }
      }
      // we couldn't find a proper implementation, as Math.random() is not suitable for /dev/random, see emscripten-core/emscripten/pull/7096
      abort("no cryptographic support found for randomDevice. consider polyfilling it if you want to use something insecure like Math.random(), e.g. put this in a --pre-js: var crypto = { getRandomValues: (array) => { for (var i = 0; i < array.length; i++) array[i] = (Math.random()*256)|0 } };");
    };
  var randomFill = (view) => {
      // Lazily init on the first invocation.
      return (randomFill = initRandomFill())(view);
    };
  
  
  
  var PATH_FS = {resolve:function() {
        var resolvedPath = '',
          resolvedAbsolute = false;
        for (var i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {
          var path = (i >= 0) ? arguments[i] : FS.cwd();
          // Skip empty and invalid entries
          if (typeof path != 'string') {
            throw new TypeError('Arguments to path.resolve must be strings');
          } else if (!path) {
            return ''; // an invalid portion invalidates the whole thing
          }
          resolvedPath = path + '/' + resolvedPath;
          resolvedAbsolute = PATH.isAbs(path);
        }
        // At this point the path should be resolved to a full absolute path, but
        // handle relative paths to be safe (might happen when process.cwd() fails)
        resolvedPath = PATH.normalizeArray(resolvedPath.split('/').filter((p) => !!p), !resolvedAbsolute).join('/');
        return ((resolvedAbsolute ? '/' : '') + resolvedPath) || '.';
      },relative:(from, to) => {
        from = PATH_FS.resolve(from).substr(1);
        to = PATH_FS.resolve(to).substr(1);
        function trim(arr) {
          var start = 0;
          for (; start < arr.length; start++) {
            if (arr[start] !== '') break;
          }
          var end = arr.length - 1;
          for (; end >= 0; end--) {
            if (arr[end] !== '') break;
          }
          if (start > end) return [];
          return arr.slice(start, end - start + 1);
        }
        var fromParts = trim(from.split('/'));
        var toParts = trim(to.split('/'));
        var length = Math.min(fromParts.length, toParts.length);
        var samePartsLength = length;
        for (var i = 0; i < length; i++) {
          if (fromParts[i] !== toParts[i]) {
            samePartsLength = i;
            break;
          }
        }
        var outputParts = [];
        for (var i = samePartsLength; i < fromParts.length; i++) {
          outputParts.push('..');
        }
        outputParts = outputParts.concat(toParts.slice(samePartsLength));
        return outputParts.join('/');
      }};
  
  
  var lengthBytesUTF8 = (str) => {
      var len = 0;
      for (var i = 0; i < str.length; ++i) {
        // Gotcha: charCodeAt returns a 16-bit word that is a UTF-16 encoded code
        // unit, not a Unicode code point of the character! So decode
        // UTF16->UTF32->UTF8.
        // See http://unicode.org/faq/utf_bom.html#utf16-3
        var c = str.charCodeAt(i); // possibly a lead surrogate
        if (c <= 0x7F) {
          len++;
        } else if (c <= 0x7FF) {
          len += 2;
        } else if (c >= 0xD800 && c <= 0xDFFF) {
          len += 4; ++i;
        } else {
          len += 3;
        }
      }
      return len;
    };
  
  var stringToUTF8Array = (str, heap, outIdx, maxBytesToWrite) => {
      assert(typeof str === 'string');
      // Parameter maxBytesToWrite is not optional. Negative values, 0, null,
      // undefined and false each don't write out any bytes.
      if (!(maxBytesToWrite > 0))
        return 0;
  
      var startIdx = outIdx;
      var endIdx = outIdx + maxBytesToWrite - 1; // -1 for string null terminator.
      for (var i = 0; i < str.length; ++i) {
        // Gotcha: charCodeAt returns a 16-bit word that is a UTF-16 encoded code
        // unit, not a Unicode code point of the character! So decode
        // UTF16->UTF32->UTF8.
        // See http://unicode.org/faq/utf_bom.html#utf16-3
        // For UTF8 byte structure, see http://en.wikipedia.org/wiki/UTF-8#Description
        // and https://www.ietf.org/rfc/rfc2279.txt
        // and https://tools.ietf.org/html/rfc3629
        var u = str.charCodeAt(i); // possibly a lead surrogate
        if (u >= 0xD800 && u <= 0xDFFF) {
          var u1 = str.charCodeAt(++i);
          u = 0x10000 + ((u & 0x3FF) << 10) | (u1 & 0x3FF);
        }
        if (u <= 0x7F) {
          if (outIdx >= endIdx) break;
          heap[outIdx++] = u;
        } else if (u <= 0x7FF) {
          if (outIdx + 1 >= endIdx) break;
          heap[outIdx++] = 0xC0 | (u >> 6);
          heap[outIdx++] = 0x80 | (u & 63);
        } else if (u <= 0xFFFF) {
          if (outIdx + 2 >= endIdx) break;
          heap[outIdx++] = 0xE0 | (u >> 12);
          heap[outIdx++] = 0x80 | ((u >> 6) & 63);
          heap[outIdx++] = 0x80 | (u & 63);
        } else {
          if (outIdx + 3 >= endIdx) break;
          if (u > 0x10FFFF) warnOnce('Invalid Unicode code point ' + ptrToString(u) + ' encountered when serializing a JS string to a UTF-8 string in wasm memory! (Valid unicode code points should be in range 0-0x10FFFF).');
          heap[outIdx++] = 0xF0 | (u >> 18);
          heap[outIdx++] = 0x80 | ((u >> 12) & 63);
          heap[outIdx++] = 0x80 | ((u >> 6) & 63);
          heap[outIdx++] = 0x80 | (u & 63);
        }
      }
      // Null-terminate the pointer to the buffer.
      heap[outIdx] = 0;
      return outIdx - startIdx;
    };
  /** @type {function(string, boolean=, number=)} */
  function intArrayFromString(stringy, dontAddNull, length) {
    var len = length > 0 ? length : lengthBytesUTF8(stringy)+1;
    var u8array = new Array(len);
    var numBytesWritten = stringToUTF8Array(stringy, u8array, 0, u8array.length);
    if (dontAddNull) u8array.length = numBytesWritten;
    return u8array;
  }
  
  var UTF8Decoder = typeof TextDecoder != 'undefined' ? new TextDecoder('utf8') : undefined;
  
    /**
     * Given a pointer 'idx' to a null-terminated UTF8-encoded string in the given
     * array that contains uint8 values, returns a copy of that string as a
     * Javascript String object.
     * heapOrArray is either a regular array, or a JavaScript typed array view.
     * @param {number} idx
     * @param {number=} maxBytesToRead
     * @return {string}
     */
  var UTF8ArrayToString = (heapOrArray, idx, maxBytesToRead) => {
      var endIdx = idx + maxBytesToRead;
      var endPtr = idx;
      // TextDecoder needs to know the byte length in advance, it doesn't stop on
      // null terminator by itself.  Also, use the length info to avoid running tiny
      // strings through TextDecoder, since .subarray() allocates garbage.
      // (As a tiny code save trick, compare endPtr against endIdx using a negation,
      // so that undefined means Infinity)
      while (heapOrArray[endPtr] && !(endPtr >= endIdx)) ++endPtr;
  
      if (endPtr - idx > 16 && heapOrArray.buffer && UTF8Decoder) {
        return UTF8Decoder.decode(heapOrArray.subarray(idx, endPtr));
      }
      var str = '';
      // If building with TextDecoder, we have already computed the string length
      // above, so test loop end condition against that
      while (idx < endPtr) {
        // For UTF8 byte structure, see:
        // http://en.wikipedia.org/wiki/UTF-8#Description
        // https://www.ietf.org/rfc/rfc2279.txt
        // https://tools.ietf.org/html/rfc3629
        var u0 = heapOrArray[idx++];
        if (!(u0 & 0x80)) { str += String.fromCharCode(u0); continue; }
        var u1 = heapOrArray[idx++] & 63;
        if ((u0 & 0xE0) == 0xC0) { str += String.fromCharCode(((u0 & 31) << 6) | u1); continue; }
        var u2 = heapOrArray[idx++] & 63;
        if ((u0 & 0xF0) == 0xE0) {
          u0 = ((u0 & 15) << 12) | (u1 << 6) | u2;
        } else {
          if ((u0 & 0xF8) != 0xF0) warnOnce('Invalid UTF-8 leading byte ' + ptrToString(u0) + ' encountered when deserializing a UTF-8 string in wasm memory to a JS string!');
          u0 = ((u0 & 7) << 18) | (u1 << 12) | (u2 << 6) | (heapOrArray[idx++] & 63);
        }
  
        if (u0 < 0x10000) {
          str += String.fromCharCode(u0);
        } else {
          var ch = u0 - 0x10000;
          str += String.fromCharCode(0xD800 | (ch >> 10), 0xDC00 | (ch & 0x3FF));
        }
      }
      return str;
    };
  var TTY = {ttys:[],init:function () {
        // https://github.com/emscripten-core/emscripten/pull/1555
        // if (ENVIRONMENT_IS_NODE) {
        //   // currently, FS.init does not distinguish if process.stdin is a file or TTY
        //   // device, it always assumes it's a TTY device. because of this, we're forcing
        //   // process.stdin to UTF8 encoding to at least make stdin reading compatible
        //   // with text files until FS.init can be refactored.
        //   process.stdin.setEncoding('utf8');
        // }
      },shutdown:function() {
        // https://github.com/emscripten-core/emscripten/pull/1555
        // if (ENVIRONMENT_IS_NODE) {
        //   // inolen: any idea as to why node -e 'process.stdin.read()' wouldn't exit immediately (with process.stdin being a tty)?
        //   // isaacs: because now it's reading from the stream, you've expressed interest in it, so that read() kicks off a _read() which creates a ReadReq operation
        //   // inolen: I thought read() in that case was a synchronous operation that just grabbed some amount of buffered data if it exists?
        //   // isaacs: it is. but it also triggers a _read() call, which calls readStart() on the handle
        //   // isaacs: do process.stdin.pause() and i'd think it'd probably close the pending call
        //   process.stdin.pause();
        // }
      },register:function(dev, ops) {
        TTY.ttys[dev] = { input: [], output: [], ops: ops };
        FS.registerDevice(dev, TTY.stream_ops);
      },stream_ops:{open:function(stream) {
          var tty = TTY.ttys[stream.node.rdev];
          if (!tty) {
            throw new FS.ErrnoError(43);
          }
          stream.tty = tty;
          stream.seekable = false;
        },close:function(stream) {
          // flush any pending line data
          stream.tty.ops.fsync(stream.tty);
        },fsync:function(stream) {
          stream.tty.ops.fsync(stream.tty);
        },read:function(stream, buffer, offset, length, pos /* ignored */) {
          if (!stream.tty || !stream.tty.ops.get_char) {
            throw new FS.ErrnoError(60);
          }
          var bytesRead = 0;
          for (var i = 0; i < length; i++) {
            var result;
            try {
              result = stream.tty.ops.get_char(stream.tty);
            } catch (e) {
              throw new FS.ErrnoError(29);
            }
            if (result === undefined && bytesRead === 0) {
              throw new FS.ErrnoError(6);
            }
            if (result === null || result === undefined) break;
            bytesRead++;
            buffer[offset+i] = result;
          }
          if (bytesRead) {
            stream.node.timestamp = Date.now();
          }
          return bytesRead;
        },write:function(stream, buffer, offset, length, pos) {
          if (!stream.tty || !stream.tty.ops.put_char) {
            throw new FS.ErrnoError(60);
          }
          try {
            for (var i = 0; i < length; i++) {
              stream.tty.ops.put_char(stream.tty, buffer[offset+i]);
            }
          } catch (e) {
            throw new FS.ErrnoError(29);
          }
          if (length) {
            stream.node.timestamp = Date.now();
          }
          return i;
        }},default_tty_ops:{get_char:function(tty) {
          if (!tty.input.length) {
            var result = null;
            if (ENVIRONMENT_IS_NODE) {
              // we will read data by chunks of BUFSIZE
              var BUFSIZE = 256;
              var buf = Buffer.alloc(BUFSIZE);
              var bytesRead = 0;
  
              try {
                bytesRead = fs.readSync(process.stdin.fd, buf, 0, BUFSIZE, -1);
              } catch(e) {
                // Cross-platform differences: on Windows, reading EOF throws an exception, but on other OSes,
                // reading EOF returns 0. Uniformize behavior by treating the EOF exception to return 0.
                if (e.toString().includes('EOF')) bytesRead = 0;
                else throw e;
              }
  
              if (bytesRead > 0) {
                result = buf.slice(0, bytesRead).toString('utf-8');
              } else {
                result = null;
              }
            } else
            if (typeof window != 'undefined' &&
              typeof window.prompt == 'function') {
              // Browser.
              result = window.prompt('Input: ');  // returns null on cancel
              if (result !== null) {
                result += '\n';
              }
            } else if (typeof readline == 'function') {
              // Command line.
              result = readline();
              if (result !== null) {
                result += '\n';
              }
            }
            if (!result) {
              return null;
            }
            tty.input = intArrayFromString(result, true);
          }
          return tty.input.shift();
        },put_char:function(tty, val) {
          if (val === null || val === 10) {
            out(UTF8ArrayToString(tty.output, 0));
            tty.output = [];
          } else {
            if (val != 0) tty.output.push(val); // val == 0 would cut text output off in the middle.
          }
        },fsync:function(tty) {
          if (tty.output && tty.output.length > 0) {
            out(UTF8ArrayToString(tty.output, 0));
            tty.output = [];
          }
        },ioctl_tcgets:function(tty) {
          // typical setting
          return {
            c_iflag: 25856,
            c_oflag: 5,
            c_cflag: 191,
            c_lflag: 35387,
            c_cc: [
              0x03, 0x1c, 0x7f, 0x15, 0x04, 0x00, 0x01, 0x00, 0x11, 0x13, 0x1a, 0x00,
              0x12, 0x0f, 0x17, 0x16, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
              0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
            ]
          };
        },ioctl_tcsets:function(tty, optional_actions, data) {
          // currently just ignore
          return 0;
        },ioctl_tiocgwinsz:function(tty) {
          return [24, 80];
        }},default_tty1_ops:{put_char:function(tty, val) {
          if (val === null || val === 10) {
            err(UTF8ArrayToString(tty.output, 0));
            tty.output = [];
          } else {
            if (val != 0) tty.output.push(val);
          }
        },fsync:function(tty) {
          if (tty.output && tty.output.length > 0) {
            err(UTF8ArrayToString(tty.output, 0));
            tty.output = [];
          }
        }}};
  
  
  var zeroMemory = (address, size) => {
      HEAPU8.fill(0, address, address + size);
      return address;
    };
  
  var alignMemory = (size, alignment) => {
      assert(alignment, "alignment argument is required");
      return Math.ceil(size / alignment) * alignment;
    };
  var mmapAlloc = (size) => {
      abort('internal error: mmapAlloc called but `emscripten_builtin_memalign` native symbol not exported');
    };
  var MEMFS = {ops_table:null,mount:function(mount) {
        return MEMFS.createNode(null, '/', 16384 | 511 /* 0777 */, 0);
      },createNode:function(parent, name, mode, dev) {
        if (FS.isBlkdev(mode) || FS.isFIFO(mode)) {
          // no supported
          throw new FS.ErrnoError(63);
        }
        if (!MEMFS.ops_table) {
          MEMFS.ops_table = {
            dir: {
              node: {
                getattr: MEMFS.node_ops.getattr,
                setattr: MEMFS.node_ops.setattr,
                lookup: MEMFS.node_ops.lookup,
                mknod: MEMFS.node_ops.mknod,
                rename: MEMFS.node_ops.rename,
                unlink: MEMFS.node_ops.unlink,
                rmdir: MEMFS.node_ops.rmdir,
                readdir: MEMFS.node_ops.readdir,
                symlink: MEMFS.node_ops.symlink
              },
              stream: {
                llseek: MEMFS.stream_ops.llseek
              }
            },
            file: {
              node: {
                getattr: MEMFS.node_ops.getattr,
                setattr: MEMFS.node_ops.setattr
              },
              stream: {
                llseek: MEMFS.stream_ops.llseek,
                read: MEMFS.stream_ops.read,
                write: MEMFS.stream_ops.write,
                allocate: MEMFS.stream_ops.allocate,
                mmap: MEMFS.stream_ops.mmap,
                msync: MEMFS.stream_ops.msync
              }
            },
            link: {
              node: {
                getattr: MEMFS.node_ops.getattr,
                setattr: MEMFS.node_ops.setattr,
                readlink: MEMFS.node_ops.readlink
              },
              stream: {}
            },
            chrdev: {
              node: {
                getattr: MEMFS.node_ops.getattr,
                setattr: MEMFS.node_ops.setattr
              },
              stream: FS.chrdev_stream_ops
            }
          };
        }
        var node = FS.createNode(parent, name, mode, dev);
        if (FS.isDir(node.mode)) {
          node.node_ops = MEMFS.ops_table.dir.node;
          node.stream_ops = MEMFS.ops_table.dir.stream;
          node.contents = {};
        } else if (FS.isFile(node.mode)) {
          node.node_ops = MEMFS.ops_table.file.node;
          node.stream_ops = MEMFS.ops_table.file.stream;
          node.usedBytes = 0; // The actual number of bytes used in the typed array, as opposed to contents.length which gives the whole capacity.
          // When the byte data of the file is populated, this will point to either a typed array, or a normal JS array. Typed arrays are preferred
          // for performance, and used by default. However, typed arrays are not resizable like normal JS arrays are, so there is a small disk size
          // penalty involved for appending file writes that continuously grow a file similar to std::vector capacity vs used -scheme.
          node.contents = null; 
        } else if (FS.isLink(node.mode)) {
          node.node_ops = MEMFS.ops_table.link.node;
          node.stream_ops = MEMFS.ops_table.link.stream;
        } else if (FS.isChrdev(node.mode)) {
          node.node_ops = MEMFS.ops_table.chrdev.node;
          node.stream_ops = MEMFS.ops_table.chrdev.stream;
        }
        node.timestamp = Date.now();
        // add the new node to the parent
        if (parent) {
          parent.contents[name] = node;
          parent.timestamp = node.timestamp;
        }
        return node;
      },getFileDataAsTypedArray:function(node) {
        if (!node.contents) return new Uint8Array(0);
        if (node.contents.subarray) return node.contents.subarray(0, node.usedBytes); // Make sure to not return excess unused bytes.
        return new Uint8Array(node.contents);
      },expandFileStorage:function(node, newCapacity) {
        var prevCapacity = node.contents ? node.contents.length : 0;
        if (prevCapacity >= newCapacity) return; // No need to expand, the storage was already large enough.
        // Don't expand strictly to the given requested limit if it's only a very small increase, but instead geometrically grow capacity.
        // For small filesizes (<1MB), perform size*2 geometric increase, but for large sizes, do a much more conservative size*1.125 increase to
        // avoid overshooting the allocation cap by a very large margin.
        var CAPACITY_DOUBLING_MAX = 1024 * 1024;
        newCapacity = Math.max(newCapacity, (prevCapacity * (prevCapacity < CAPACITY_DOUBLING_MAX ? 2.0 : 1.125)) >>> 0);
        if (prevCapacity != 0) newCapacity = Math.max(newCapacity, 256); // At minimum allocate 256b for each file when expanding.
        var oldContents = node.contents;
        node.contents = new Uint8Array(newCapacity); // Allocate new storage.
        if (node.usedBytes > 0) node.contents.set(oldContents.subarray(0, node.usedBytes), 0); // Copy old data over to the new storage.
      },resizeFileStorage:function(node, newSize) {
        if (node.usedBytes == newSize) return;
        if (newSize == 0) {
          node.contents = null; // Fully decommit when requesting a resize to zero.
          node.usedBytes = 0;
        } else {
          var oldContents = node.contents;
          node.contents = new Uint8Array(newSize); // Allocate new storage.
          if (oldContents) {
            node.contents.set(oldContents.subarray(0, Math.min(newSize, node.usedBytes))); // Copy old data over to the new storage.
          }
          node.usedBytes = newSize;
        }
      },node_ops:{getattr:function(node) {
          var attr = {};
          // device numbers reuse inode numbers.
          attr.dev = FS.isChrdev(node.mode) ? node.id : 1;
          attr.ino = node.id;
          attr.mode = node.mode;
          attr.nlink = 1;
          attr.uid = 0;
          attr.gid = 0;
          attr.rdev = node.rdev;
          if (FS.isDir(node.mode)) {
            attr.size = 4096;
          } else if (FS.isFile(node.mode)) {
            attr.size = node.usedBytes;
          } else if (FS.isLink(node.mode)) {
            attr.size = node.link.length;
          } else {
            attr.size = 0;
          }
          attr.atime = new Date(node.timestamp);
          attr.mtime = new Date(node.timestamp);
          attr.ctime = new Date(node.timestamp);
          // NOTE: In our implementation, st_blocks = Math.ceil(st_size/st_blksize),
          //       but this is not required by the standard.
          attr.blksize = 4096;
          attr.blocks = Math.ceil(attr.size / attr.blksize);
          return attr;
        },setattr:function(node, attr) {
          if (attr.mode !== undefined) {
            node.mode = attr.mode;
          }
          if (attr.timestamp !== undefined) {
            node.timestamp = attr.timestamp;
          }
          if (attr.size !== undefined) {
            MEMFS.resizeFileStorage(node, attr.size);
          }
        },lookup:function(parent, name) {
          throw FS.genericErrors[44];
        },mknod:function(parent, name, mode, dev) {
          return MEMFS.createNode(parent, name, mode, dev);
        },rename:function(old_node, new_dir, new_name) {
          // if we're overwriting a directory at new_name, make sure it's empty.
          if (FS.isDir(old_node.mode)) {
            var new_node;
            try {
              new_node = FS.lookupNode(new_dir, new_name);
            } catch (e) {
            }
            if (new_node) {
              for (var i in new_node.contents) {
                throw new FS.ErrnoError(55);
              }
            }
          }
          // do the internal rewiring
          delete old_node.parent.contents[old_node.name];
          old_node.parent.timestamp = Date.now()
          old_node.name = new_name;
          new_dir.contents[new_name] = old_node;
          new_dir.timestamp = old_node.parent.timestamp;
          old_node.parent = new_dir;
        },unlink:function(parent, name) {
          delete parent.contents[name];
          parent.timestamp = Date.now();
        },rmdir:function(parent, name) {
          var node = FS.lookupNode(parent, name);
          for (var i in node.contents) {
            throw new FS.ErrnoError(55);
          }
          delete parent.contents[name];
          parent.timestamp = Date.now();
        },readdir:function(node) {
          var entries = ['.', '..'];
          for (var key in node.contents) {
            if (!node.contents.hasOwnProperty(key)) {
              continue;
            }
            entries.push(key);
          }
          return entries;
        },symlink:function(parent, newname, oldpath) {
          var node = MEMFS.createNode(parent, newname, 511 /* 0777 */ | 40960, 0);
          node.link = oldpath;
          return node;
        },readlink:function(node) {
          if (!FS.isLink(node.mode)) {
            throw new FS.ErrnoError(28);
          }
          return node.link;
        }},stream_ops:{read:function(stream, buffer, offset, length, position) {
          var contents = stream.node.contents;
          if (position >= stream.node.usedBytes) return 0;
          var size = Math.min(stream.node.usedBytes - position, length);
          assert(size >= 0);
          if (size > 8 && contents.subarray) { // non-trivial, and typed array
            buffer.set(contents.subarray(position, position + size), offset);
          } else {
            for (var i = 0; i < size; i++) buffer[offset + i] = contents[position + i];
          }
          return size;
        },write:function(stream, buffer, offset, length, position, canOwn) {
          // The data buffer should be a typed array view
          assert(!(buffer instanceof ArrayBuffer));
  
          if (!length) return 0;
          var node = stream.node;
          node.timestamp = Date.now();
  
          if (buffer.subarray && (!node.contents || node.contents.subarray)) { // This write is from a typed array to a typed array?
            if (canOwn) {
              assert(position === 0, 'canOwn must imply no weird position inside the file');
              node.contents = buffer.subarray(offset, offset + length);
              node.usedBytes = length;
              return length;
            } else if (node.usedBytes === 0 && position === 0) { // If this is a simple first write to an empty file, do a fast set since we don't need to care about old data.
              node.contents = buffer.slice(offset, offset + length);
              node.usedBytes = length;
              return length;
            } else if (position + length <= node.usedBytes) { // Writing to an already allocated and used subrange of the file?
              node.contents.set(buffer.subarray(offset, offset + length), position);
              return length;
            }
          }
  
          // Appending to an existing file and we need to reallocate, or source data did not come as a typed array.
          MEMFS.expandFileStorage(node, position+length);
          if (node.contents.subarray && buffer.subarray) {
            // Use typed array write which is available.
            node.contents.set(buffer.subarray(offset, offset + length), position);
          } else {
            for (var i = 0; i < length; i++) {
             node.contents[position + i] = buffer[offset + i]; // Or fall back to manual write if not.
            }
          }
          node.usedBytes = Math.max(node.usedBytes, position + length);
          return length;
        },llseek:function(stream, offset, whence) {
          var position = offset;
          if (whence === 1) {
            position += stream.position;
          } else if (whence === 2) {
            if (FS.isFile(stream.node.mode)) {
              position += stream.node.usedBytes;
            }
          }
          if (position < 0) {
            throw new FS.ErrnoError(28);
          }
          return position;
        },allocate:function(stream, offset, length) {
          MEMFS.expandFileStorage(stream.node, offset + length);
          stream.node.usedBytes = Math.max(stream.node.usedBytes, offset + length);
        },mmap:function(stream, length, position, prot, flags) {
          if (!FS.isFile(stream.node.mode)) {
            throw new FS.ErrnoError(43);
          }
          var ptr;
          var allocated;
          var contents = stream.node.contents;
          // Only make a new copy when MAP_PRIVATE is specified.
          if (!(flags & 2) && contents.buffer === HEAP8.buffer) {
            // We can't emulate MAP_SHARED when the file is not backed by the
            // buffer we're mapping to (e.g. the HEAP buffer).
            allocated = false;
            ptr = contents.byteOffset;
          } else {
            // Try to avoid unnecessary slices.
            if (position > 0 || position + length < contents.length) {
              if (contents.subarray) {
                contents = contents.subarray(position, position + length);
              } else {
                contents = Array.prototype.slice.call(contents, position, position + length);
              }
            }
            allocated = true;
            ptr = mmapAlloc(length);
            if (!ptr) {
              throw new FS.ErrnoError(48);
            }
            HEAP8.set(contents, ptr);
          }
          return { ptr, allocated };
        },msync:function(stream, buffer, offset, length, mmapFlags) {
          MEMFS.stream_ops.write(stream, buffer, 0, length, offset, false);
          // should we check if bytesWritten and length are the same?
          return 0;
        }}};
  
  /** @param {boolean=} noRunDep */
  var asyncLoad = (url, onload, onerror, noRunDep) => {
      var dep = !noRunDep ? getUniqueRunDependency(`al ${url}`) : '';
      readAsync(url, (arrayBuffer) => {
        assert(arrayBuffer, `Loading data file "${url}" failed (no arrayBuffer).`);
        onload(new Uint8Array(arrayBuffer));
        if (dep) removeRunDependency(dep);
      }, (event) => {
        if (onerror) {
          onerror();
        } else {
          throw `Loading data file "${url}" failed.`;
        }
      });
      if (dep) addRunDependency(dep);
    };
  
  
  var preloadPlugins = Module['preloadPlugins'] || [];
  function FS_handledByPreloadPlugin(byteArray, fullname, finish, onerror) {
      // Ensure plugins are ready.
      if (typeof Browser != 'undefined') Browser.init();
  
      var handled = false;
      preloadPlugins.forEach(function(plugin) {
        if (handled) return;
        if (plugin['canHandle'](fullname)) {
          plugin['handle'](byteArray, fullname, finish, onerror);
          handled = true;
        }
      });
      return handled;
    }
  function FS_createPreloadedFile(parent, name, url, canRead, canWrite, onload, onerror, dontCreateFile, canOwn, preFinish) {
      // TODO we should allow people to just pass in a complete filename instead
      // of parent and name being that we just join them anyways
      var fullname = name ? PATH_FS.resolve(PATH.join2(parent, name)) : parent;
      var dep = getUniqueRunDependency(`cp ${fullname}`); // might have several active requests for the same fullname
      function processData(byteArray) {
        function finish(byteArray) {
          if (preFinish) preFinish();
          if (!dontCreateFile) {
            FS.createDataFile(parent, name, byteArray, canRead, canWrite, canOwn);
          }
          if (onload) onload();
          removeRunDependency(dep);
        }
        if (FS_handledByPreloadPlugin(byteArray, fullname, finish, () => {
          if (onerror) onerror();
          removeRunDependency(dep);
        })) {
          return;
        }
        finish(byteArray);
      }
      addRunDependency(dep);
      if (typeof url == 'string') {
        asyncLoad(url, (byteArray) => processData(byteArray), onerror);
      } else {
        processData(url);
      }
    }
  
  function FS_modeStringToFlags(str) {
      var flagModes = {
        'r': 0,
        'r+': 2,
        'w': 512 | 64 | 1,
        'w+': 512 | 64 | 2,
        'a': 1024 | 64 | 1,
        'a+': 1024 | 64 | 2,
      };
      var flags = flagModes[str];
      if (typeof flags == 'undefined') {
        throw new Error(`Unknown file open mode: ${str}`);
      }
      return flags;
    }
  
  function FS_getMode(canRead, canWrite) {
      var mode = 0;
      if (canRead) mode |= 292 | 73;
      if (canWrite) mode |= 146;
      return mode;
    }
  
  
  
  
  var ERRNO_MESSAGES = {0:"Success",1:"Arg list too long",2:"Permission denied",3:"Address already in use",4:"Address not available",5:"Address family not supported by protocol family",6:"No more processes",7:"Socket already connected",8:"Bad file number",9:"Trying to read unreadable message",10:"Mount device busy",11:"Operation canceled",12:"No children",13:"Connection aborted",14:"Connection refused",15:"Connection reset by peer",16:"File locking deadlock error",17:"Destination address required",18:"Math arg out of domain of func",19:"Quota exceeded",20:"File exists",21:"Bad address",22:"File too large",23:"Host is unreachable",24:"Identifier removed",25:"Illegal byte sequence",26:"Connection already in progress",27:"Interrupted system call",28:"Invalid argument",29:"I/O error",30:"Socket is already connected",31:"Is a directory",32:"Too many symbolic links",33:"Too many open files",34:"Too many links",35:"Message too long",36:"Multihop attempted",37:"File or path name too long",38:"Network interface is not configured",39:"Connection reset by network",40:"Network is unreachable",41:"Too many open files in system",42:"No buffer space available",43:"No such device",44:"No such file or directory",45:"Exec format error",46:"No record locks available",47:"The link has been severed",48:"Not enough core",49:"No message of desired type",50:"Protocol not available",51:"No space left on device",52:"Function not implemented",53:"Socket is not connected",54:"Not a directory",55:"Directory not empty",56:"State not recoverable",57:"Socket operation on non-socket",59:"Not a typewriter",60:"No such device or address",61:"Value too large for defined data type",62:"Previous owner died",63:"Not super-user",64:"Broken pipe",65:"Protocol error",66:"Unknown protocol",67:"Protocol wrong type for socket",68:"Math result not representable",69:"Read only file system",70:"Illegal seek",71:"No such process",72:"Stale file handle",73:"Connection timed out",74:"Text file busy",75:"Cross-device link",100:"Device not a stream",101:"Bad font file fmt",102:"Invalid slot",103:"Invalid request code",104:"No anode",105:"Block device required",106:"Channel number out of range",107:"Level 3 halted",108:"Level 3 reset",109:"Link number out of range",110:"Protocol driver not attached",111:"No CSI structure available",112:"Level 2 halted",113:"Invalid exchange",114:"Invalid request descriptor",115:"Exchange full",116:"No data (for no delay io)",117:"Timer expired",118:"Out of streams resources",119:"Machine is not on the network",120:"Package not installed",121:"The object is remote",122:"Advertise error",123:"Srmount error",124:"Communication error on send",125:"Cross mount point (not really error)",126:"Given log. name not unique",127:"f.d. invalid for this operation",128:"Remote address changed",129:"Can   access a needed shared lib",130:"Accessing a corrupted shared lib",131:".lib section in a.out corrupted",132:"Attempting to link in too many libs",133:"Attempting to exec a shared library",135:"Streams pipe error",136:"Too many users",137:"Socket type not supported",138:"Not supported",139:"Protocol family not supported",140:"Can't send after socket shutdown",141:"Too many references",142:"Host is down",148:"No medium (in tape drive)",156:"Level 2 not synchronized"};
  
  var ERRNO_CODES = {};
  
  function demangle(func) {
      warnOnce('warning: build with -sDEMANGLE_SUPPORT to link in libcxxabi demangling');
      return func;
    }
  function demangleAll(text) {
      var regex =
        /\b_Z[\w\d_]+/g;
      return text.replace(regex,
        function(x) {
          var y = demangle(x);
          return x === y ? x : (y + ' [' + x + ']');
        });
    }
  var FS = {root:null,mounts:[],devices:{},streams:[],nextInode:1,nameTable:null,currentPath:"/",initialized:false,ignorePermissions:true,ErrnoError:null,genericErrors:{},filesystems:null,syncFSRequests:0,lookupPath:(path, opts = {}) => {
        path = PATH_FS.resolve(path);
  
        if (!path) return { path: '', node: null };
  
        var defaults = {
          follow_mount: true,
          recurse_count: 0
        };
        opts = Object.assign(defaults, opts)
  
        if (opts.recurse_count > 8) {  // max recursive lookup of 8
          throw new FS.ErrnoError(32);
        }
  
        // split the absolute path
        var parts = path.split('/').filter((p) => !!p);
  
        // start at the root
        var current = FS.root;
        var current_path = '/';
  
        for (var i = 0; i < parts.length; i++) {
          var islast = (i === parts.length-1);
          if (islast && opts.parent) {
            // stop resolving
            break;
          }
  
          current = FS.lookupNode(current, parts[i]);
          current_path = PATH.join2(current_path, parts[i]);
  
          // jump to the mount's root node if this is a mountpoint
          if (FS.isMountpoint(current)) {
            if (!islast || (islast && opts.follow_mount)) {
              current = current.mounted.root;
            }
          }
  
          // by default, lookupPath will not follow a symlink if it is the final path component.
          // setting opts.follow = true will override this behavior.
          if (!islast || opts.follow) {
            var count = 0;
            while (FS.isLink(current.mode)) {
              var link = FS.readlink(current_path);
              current_path = PATH_FS.resolve(PATH.dirname(current_path), link);
  
              var lookup = FS.lookupPath(current_path, { recurse_count: opts.recurse_count + 1 });
              current = lookup.node;
  
              if (count++ > 40) {  // limit max consecutive symlinks to 40 (SYMLOOP_MAX).
                throw new FS.ErrnoError(32);
              }
            }
          }
        }
  
        return { path: current_path, node: current };
      },getPath:(node) => {
        var path;
        while (true) {
          if (FS.isRoot(node)) {
            var mount = node.mount.mountpoint;
            if (!path) return mount;
            return mount[mount.length-1] !== '/' ? `${mount}/${path}` : mount + path;
          }
          path = path ? `${node.name}/${path}` : node.name;
          node = node.parent;
        }
      },hashName:(parentid, name) => {
        var hash = 0;
  
        for (var i = 0; i < name.length; i++) {
          hash = ((hash << 5) - hash + name.charCodeAt(i)) | 0;
        }
        return ((parentid + hash) >>> 0) % FS.nameTable.length;
      },hashAddNode:(node) => {
        var hash = FS.hashName(node.parent.id, node.name);
        node.name_next = FS.nameTable[hash];
        FS.nameTable[hash] = node;
      },hashRemoveNode:(node) => {
        var hash = FS.hashName(node.parent.id, node.name);
        if (FS.nameTable[hash] === node) {
          FS.nameTable[hash] = node.name_next;
        } else {
          var current = FS.nameTable[hash];
          while (current) {
            if (current.name_next === node) {
              current.name_next = node.name_next;
              break;
            }
            current = current.name_next;
          }
        }
      },lookupNode:(parent, name) => {
        var errCode = FS.mayLookup(parent);
        if (errCode) {
          throw new FS.ErrnoError(errCode, parent);
        }
        var hash = FS.hashName(parent.id, name);
        for (var node = FS.nameTable[hash]; node; node = node.name_next) {
          var nodeName = node.name;
          if (node.parent.id === parent.id && nodeName === name) {
            return node;
          }
        }
        // if we failed to find it in the cache, call into the VFS
        return FS.lookup(parent, name);
      },createNode:(parent, name, mode, rdev) => {
        assert(typeof parent == 'object')
        var node = new FS.FSNode(parent, name, mode, rdev);
  
        FS.hashAddNode(node);
  
        return node;
      },destroyNode:(node) => {
        FS.hashRemoveNode(node);
      },isRoot:(node) => {
        return node === node.parent;
      },isMountpoint:(node) => {
        return !!node.mounted;
      },isFile:(mode) => {
        return (mode & 61440) === 32768;
      },isDir:(mode) => {
        return (mode & 61440) === 16384;
      },isLink:(mode) => {
        return (mode & 61440) === 40960;
      },isChrdev:(mode) => {
        return (mode & 61440) === 8192;
      },isBlkdev:(mode) => {
        return (mode & 61440) === 24576;
      },isFIFO:(mode) => {
        return (mode & 61440) === 4096;
      },isSocket:(mode) => {
        return (mode & 49152) === 49152;
      },flagsToPermissionString:(flag) => {
        var perms = ['r', 'w', 'rw'][flag & 3];
        if ((flag & 512)) {
          perms += 'w';
        }
        return perms;
      },nodePermissions:(node, perms) => {
        if (FS.ignorePermissions) {
          return 0;
        }
        // return 0 if any user, group or owner bits are set.
        if (perms.includes('r') && !(node.mode & 292)) {
          return 2;
        } else if (perms.includes('w') && !(node.mode & 146)) {
          return 2;
        } else if (perms.includes('x') && !(node.mode & 73)) {
          return 2;
        }
        return 0;
      },mayLookup:(dir) => {
        var errCode = FS.nodePermissions(dir, 'x');
        if (errCode) return errCode;
        if (!dir.node_ops.lookup) return 2;
        return 0;
      },mayCreate:(dir, name) => {
        try {
          var node = FS.lookupNode(dir, name);
          return 20;
        } catch (e) {
        }
        return FS.nodePermissions(dir, 'wx');
      },mayDelete:(dir, name, isdir) => {
        var node;
        try {
          node = FS.lookupNode(dir, name);
        } catch (e) {
          return e.errno;
        }
        var errCode = FS.nodePermissions(dir, 'wx');
        if (errCode) {
          return errCode;
        }
        if (isdir) {
          if (!FS.isDir(node.mode)) {
            return 54;
          }
          if (FS.isRoot(node) || FS.getPath(node) === FS.cwd()) {
            return 10;
          }
        } else {
          if (FS.isDir(node.mode)) {
            return 31;
          }
        }
        return 0;
      },mayOpen:(node, flags) => {
        if (!node) {
          return 44;
        }
        if (FS.isLink(node.mode)) {
          return 32;
        } else if (FS.isDir(node.mode)) {
          if (FS.flagsToPermissionString(flags) !== 'r' || // opening for write
              (flags & 512)) { // TODO: check for O_SEARCH? (== search for dir only)
            return 31;
          }
        }
        return FS.nodePermissions(node, FS.flagsToPermissionString(flags));
      },MAX_OPEN_FDS:4096,nextfd:() => {
        for (var fd = 0; fd <= FS.MAX_OPEN_FDS; fd++) {
          if (!FS.streams[fd]) {
            return fd;
          }
        }
        throw new FS.ErrnoError(33);
      },getStreamChecked:(fd) => {
        var stream = FS.getStream(fd);
        if (!stream) {
          throw new FS.ErrnoError(8);
        }
        return stream;
      },getStream:(fd) => FS.streams[fd],createStream:(stream, fd = -1) => {
        if (!FS.FSStream) {
          FS.FSStream = /** @constructor */ function() {
            this.shared = { };
          };
          FS.FSStream.prototype = {};
          Object.defineProperties(FS.FSStream.prototype, {
            object: {
              /** @this {FS.FSStream} */
              get: function() { return this.node; },
              /** @this {FS.FSStream} */
              set: function(val) { this.node = val; }
            },
            isRead: {
              /** @this {FS.FSStream} */
              get: function() { return (this.flags & 2097155) !== 1; }
            },
            isWrite: {
              /** @this {FS.FSStream} */
              get: function() { return (this.flags & 2097155) !== 0; }
            },
            isAppend: {
              /** @this {FS.FSStream} */
              get: function() { return (this.flags & 1024); }
            },
            flags: {
              /** @this {FS.FSStream} */
              get: function() { return this.shared.flags; },
              /** @this {FS.FSStream} */
              set: function(val) { this.shared.flags = val; },
            },
            position : {
              /** @this {FS.FSStream} */
              get: function() { return this.shared.position; },
              /** @this {FS.FSStream} */
              set: function(val) { this.shared.position = val; },
            },
          });
        }
        // clone it, so we can return an instance of FSStream
        stream = Object.assign(new FS.FSStream(), stream);
        if (fd == -1) {
          fd = FS.nextfd();
        }
        stream.fd = fd;
        FS.streams[fd] = stream;
        return stream;
      },closeStream:(fd) => {
        FS.streams[fd] = null;
      },chrdev_stream_ops:{open:(stream) => {
          var device = FS.getDevice(stream.node.rdev);
          // override node's stream ops with the device's
          stream.stream_ops = device.stream_ops;
          // forward the open call
          if (stream.stream_ops.open) {
            stream.stream_ops.open(stream);
          }
        },llseek:() => {
          throw new FS.ErrnoError(70);
        }},major:(dev) => ((dev) >> 8),minor:(dev) => ((dev) & 0xff),makedev:(ma, mi) => ((ma) << 8 | (mi)),registerDevice:(dev, ops) => {
        FS.devices[dev] = { stream_ops: ops };
      },getDevice:(dev) => FS.devices[dev],getMounts:(mount) => {
        var mounts = [];
        var check = [mount];
  
        while (check.length) {
          var m = check.pop();
  
          mounts.push(m);
  
          check.push.apply(check, m.mounts);
        }
  
        return mounts;
      },syncfs:(populate, callback) => {
        if (typeof populate == 'function') {
          callback = populate;
          populate = false;
        }
  
        FS.syncFSRequests++;
  
        if (FS.syncFSRequests > 1) {
          err(`warning: ${FS.syncFSRequests} FS.syncfs operations in flight at once, probably just doing extra work`);
        }
  
        var mounts = FS.getMounts(FS.root.mount);
        var completed = 0;
  
        function doCallback(errCode) {
          assert(FS.syncFSRequests > 0);
          FS.syncFSRequests--;
          return callback(errCode);
        }
  
        function done(errCode) {
          if (errCode) {
            if (!done.errored) {
              done.errored = true;
              return doCallback(errCode);
            }
            return;
          }
          if (++completed >= mounts.length) {
            doCallback(null);
          }
        };
  
        // sync all mounts
        mounts.forEach((mount) => {
          if (!mount.type.syncfs) {
            return done(null);
          }
          mount.type.syncfs(mount, populate, done);
        });
      },mount:(type, opts, mountpoint) => {
        if (typeof type == 'string') {
          // The filesystem was not included, and instead we have an error
          // message stored in the variable.
          throw type;
        }
        var root = mountpoint === '/';
        var pseudo = !mountpoint;
        var node;
  
        if (root && FS.root) {
          throw new FS.ErrnoError(10);
        } else if (!root && !pseudo) {
          var lookup = FS.lookupPath(mountpoint, { follow_mount: false });
  
          mountpoint = lookup.path;  // use the absolute path
          node = lookup.node;
  
          if (FS.isMountpoint(node)) {
            throw new FS.ErrnoError(10);
          }
  
          if (!FS.isDir(node.mode)) {
            throw new FS.ErrnoError(54);
          }
        }
  
        var mount = {
          type,
          opts,
          mountpoint,
          mounts: []
        };
  
        // create a root node for the fs
        var mountRoot = type.mount(mount);
        mountRoot.mount = mount;
        mount.root = mountRoot;
  
        if (root) {
          FS.root = mountRoot;
        } else if (node) {
          // set as a mountpoint
          node.mounted = mount;
  
          // add the new mount to the current mount's children
          if (node.mount) {
            node.mount.mounts.push(mount);
          }
        }
  
        return mountRoot;
      },unmount:(mountpoint) => {
        var lookup = FS.lookupPath(mountpoint, { follow_mount: false });
  
        if (!FS.isMountpoint(lookup.node)) {
          throw new FS.ErrnoError(28);
        }
  
        // destroy the nodes for this mount, and all its child mounts
        var node = lookup.node;
        var mount = node.mounted;
        var mounts = FS.getMounts(mount);
  
        Object.keys(FS.nameTable).forEach((hash) => {
          var current = FS.nameTable[hash];
  
          while (current) {
            var next = current.name_next;
  
            if (mounts.includes(current.mount)) {
              FS.destroyNode(current);
            }
  
            current = next;
          }
        });
  
        // no longer a mountpoint
        node.mounted = null;
  
        // remove this mount from the child mounts
        var idx = node.mount.mounts.indexOf(mount);
        assert(idx !== -1);
        node.mount.mounts.splice(idx, 1);
      },lookup:(parent, name) => {
        return parent.node_ops.lookup(parent, name);
      },mknod:(path, mode, dev) => {
        var lookup = FS.lookupPath(path, { parent: true });
        var parent = lookup.node;
        var name = PATH.basename(path);
        if (!name || name === '.' || name === '..') {
          throw new FS.ErrnoError(28);
        }
        var errCode = FS.mayCreate(parent, name);
        if (errCode) {
          throw new FS.ErrnoError(errCode);
        }
        if (!parent.node_ops.mknod) {
          throw new FS.ErrnoError(63);
        }
        return parent.node_ops.mknod(parent, name, mode, dev);
      },create:(path, mode) => {
        mode = mode !== undefined ? mode : 438 /* 0666 */;
        mode &= 4095;
        mode |= 32768;
        return FS.mknod(path, mode, 0);
      },mkdir:(path, mode) => {
        mode = mode !== undefined ? mode : 511 /* 0777 */;
        mode &= 511 | 512;
        mode |= 16384;
        return FS.mknod(path, mode, 0);
      },mkdirTree:(path, mode) => {
        var dirs = path.split('/');
        var d = '';
        for (var i = 0; i < dirs.length; ++i) {
          if (!dirs[i]) continue;
          d += '/' + dirs[i];
          try {
            FS.mkdir(d, mode);
          } catch(e) {
            if (e.errno != 20) throw e;
          }
        }
      },mkdev:(path, mode, dev) => {
        if (typeof dev == 'undefined') {
          dev = mode;
          mode = 438 /* 0666 */;
        }
        mode |= 8192;
        return FS.mknod(path, mode, dev);
      },symlink:(oldpath, newpath) => {
        if (!PATH_FS.resolve(oldpath)) {
          throw new FS.ErrnoError(44);
        }
        var lookup = FS.lookupPath(newpath, { parent: true });
        var parent = lookup.node;
        if (!parent) {
          throw new FS.ErrnoError(44);
        }
        var newname = PATH.basename(newpath);
        var errCode = FS.mayCreate(parent, newname);
        if (errCode) {
          throw new FS.ErrnoError(errCode);
        }
        if (!parent.node_ops.symlink) {
          throw new FS.ErrnoError(63);
        }
        return parent.node_ops.symlink(parent, newname, oldpath);
      },rename:(old_path, new_path) => {
        var old_dirname = PATH.dirname(old_path);
        var new_dirname = PATH.dirname(new_path);
        var old_name = PATH.basename(old_path);
        var new_name = PATH.basename(new_path);
        // parents must exist
        var lookup, old_dir, new_dir;
  
        // let the errors from non existant directories percolate up
        lookup = FS.lookupPath(old_path, { parent: true });
        old_dir = lookup.node;
        lookup = FS.lookupPath(new_path, { parent: true });
        new_dir = lookup.node;
  
        if (!old_dir || !new_dir) throw new FS.ErrnoError(44);
        // need to be part of the same mount
        if (old_dir.mount !== new_dir.mount) {
          throw new FS.ErrnoError(75);
        }
        // source must exist
        var old_node = FS.lookupNode(old_dir, old_name);
        // old path should not be an ancestor of the new path
        var relative = PATH_FS.relative(old_path, new_dirname);
        if (relative.charAt(0) !== '.') {
          throw new FS.ErrnoError(28);
        }
        // new path should not be an ancestor of the old path
        relative = PATH_FS.relative(new_path, old_dirname);
        if (relative.charAt(0) !== '.') {
          throw new FS.ErrnoError(55);
        }
        // see if the new path already exists
        var new_node;
        try {
          new_node = FS.lookupNode(new_dir, new_name);
        } catch (e) {
          // not fatal
        }
        // early out if nothing needs to change
        if (old_node === new_node) {
          return;
        }
        // we'll need to delete the old entry
        var isdir = FS.isDir(old_node.mode);
        var errCode = FS.mayDelete(old_dir, old_name, isdir);
        if (errCode) {
          throw new FS.ErrnoError(errCode);
        }
        // need delete permissions if we'll be overwriting.
        // need create permissions if new doesn't already exist.
        errCode = new_node ?
          FS.mayDelete(new_dir, new_name, isdir) :
          FS.mayCreate(new_dir, new_name);
        if (errCode) {
          throw new FS.ErrnoError(errCode);
        }
        if (!old_dir.node_ops.rename) {
          throw new FS.ErrnoError(63);
        }
        if (FS.isMountpoint(old_node) || (new_node && FS.isMountpoint(new_node))) {
          throw new FS.ErrnoError(10);
        }
        // if we are going to change the parent, check write permissions
        if (new_dir !== old_dir) {
          errCode = FS.nodePermissions(old_dir, 'w');
          if (errCode) {
            throw new FS.ErrnoError(errCode);
          }
        }
        // remove the node from the lookup hash
        FS.hashRemoveNode(old_node);
        // do the underlying fs rename
        try {
          old_dir.node_ops.rename(old_node, new_dir, new_name);
        } catch (e) {
          throw e;
        } finally {
          // add the node back to the hash (in case node_ops.rename
          // changed its name)
          FS.hashAddNode(old_node);
        }
      },rmdir:(path) => {
        var lookup = FS.lookupPath(path, { parent: true });
        var parent = lookup.node;
        var name = PATH.basename(path);
        var node = FS.lookupNode(parent, name);
        var errCode = FS.mayDelete(parent, name, true);
        if (errCode) {
          throw new FS.ErrnoError(errCode);
        }
        if (!parent.node_ops.rmdir) {
          throw new FS.ErrnoError(63);
        }
        if (FS.isMountpoint(node)) {
          throw new FS.ErrnoError(10);
        }
        parent.node_ops.rmdir(parent, name);
        FS.destroyNode(node);
      },readdir:(path) => {
        var lookup = FS.lookupPath(path, { follow: true });
        var node = lookup.node;
        if (!node.node_ops.readdir) {
          throw new FS.ErrnoError(54);
        }
        return node.node_ops.readdir(node);
      },unlink:(path) => {
        var lookup = FS.lookupPath(path, { parent: true });
        var parent = lookup.node;
        if (!parent) {
          throw new FS.ErrnoError(44);
        }
        var name = PATH.basename(path);
        var node = FS.lookupNode(parent, name);
        var errCode = FS.mayDelete(parent, name, false);
        if (errCode) {
          // According to POSIX, we should map EISDIR to EPERM, but
          // we instead do what Linux does (and we must, as we use
          // the musl linux libc).
          throw new FS.ErrnoError(errCode);
        }
        if (!parent.node_ops.unlink) {
          throw new FS.ErrnoError(63);
        }
        if (FS.isMountpoint(node)) {
          throw new FS.ErrnoError(10);
        }
        parent.node_ops.unlink(parent, name);
        FS.destroyNode(node);
      },readlink:(path) => {
        var lookup = FS.lookupPath(path);
        var link = lookup.node;
        if (!link) {
          throw new FS.ErrnoError(44);
        }
        if (!link.node_ops.readlink) {
          throw new FS.ErrnoError(28);
        }
        return PATH_FS.resolve(FS.getPath(link.parent), link.node_ops.readlink(link));
      },stat:(path, dontFollow) => {
        var lookup = FS.lookupPath(path, { follow: !dontFollow });
        var node = lookup.node;
        if (!node) {
          throw new FS.ErrnoError(44);
        }
        if (!node.node_ops.getattr) {
          throw new FS.ErrnoError(63);
        }
        return node.node_ops.getattr(node);
      },lstat:(path) => {
        return FS.stat(path, true);
      },chmod:(path, mode, dontFollow) => {
        var node;
        if (typeof path == 'string') {
          var lookup = FS.lookupPath(path, { follow: !dontFollow });
          node = lookup.node;
        } else {
          node = path;
        }
        if (!node.node_ops.setattr) {
          throw new FS.ErrnoError(63);
        }
        node.node_ops.setattr(node, {
          mode: (mode & 4095) | (node.mode & ~4095),
          timestamp: Date.now()
        });
      },lchmod:(path, mode) => {
        FS.chmod(path, mode, true);
      },fchmod:(fd, mode) => {
        var stream = FS.getStreamChecked(fd);
        FS.chmod(stream.node, mode);
      },chown:(path, uid, gid, dontFollow) => {
        var node;
        if (typeof path == 'string') {
          var lookup = FS.lookupPath(path, { follow: !dontFollow });
          node = lookup.node;
        } else {
          node = path;
        }
        if (!node.node_ops.setattr) {
          throw new FS.ErrnoError(63);
        }
        node.node_ops.setattr(node, {
          timestamp: Date.now()
          // we ignore the uid / gid for now
        });
      },lchown:(path, uid, gid) => {
        FS.chown(path, uid, gid, true);
      },fchown:(fd, uid, gid) => {
        var stream = FS.getStreamChecked(fd);
        FS.chown(stream.node, uid, gid);
      },truncate:(path, len) => {
        if (len < 0) {
          throw new FS.ErrnoError(28);
        }
        var node;
        if (typeof path == 'string') {
          var lookup = FS.lookupPath(path, { follow: true });
          node = lookup.node;
        } else {
          node = path;
        }
        if (!node.node_ops.setattr) {
          throw new FS.ErrnoError(63);
        }
        if (FS.isDir(node.mode)) {
          throw new FS.ErrnoError(31);
        }
        if (!FS.isFile(node.mode)) {
          throw new FS.ErrnoError(28);
        }
        var errCode = FS.nodePermissions(node, 'w');
        if (errCode) {
          throw new FS.ErrnoError(errCode);
        }
        node.node_ops.setattr(node, {
          size: len,
          timestamp: Date.now()
        });
      },ftruncate:(fd, len) => {
        var stream = FS.getStreamChecked(fd);
        if ((stream.flags & 2097155) === 0) {
          throw new FS.ErrnoError(28);
        }
        FS.truncate(stream.node, len);
      },utime:(path, atime, mtime) => {
        var lookup = FS.lookupPath(path, { follow: true });
        var node = lookup.node;
        node.node_ops.setattr(node, {
          timestamp: Math.max(atime, mtime)
        });
      },open:(path, flags, mode) => {
        if (path === "") {
          throw new FS.ErrnoError(44);
        }
        flags = typeof flags == 'string' ? FS_modeStringToFlags(flags) : flags;
        mode = typeof mode == 'undefined' ? 438 /* 0666 */ : mode;
        if ((flags & 64)) {
          mode = (mode & 4095) | 32768;
        } else {
          mode = 0;
        }
        var node;
        if (typeof path == 'object') {
          node = path;
        } else {
          path = PATH.normalize(path);
          try {
            var lookup = FS.lookupPath(path, {
              follow: !(flags & 131072)
            });
            node = lookup.node;
          } catch (e) {
            // ignore
          }
        }
        // perhaps we need to create the node
        var created = false;
        if ((flags & 64)) {
          if (node) {
            // if O_CREAT and O_EXCL are set, error out if the node already exists
            if ((flags & 128)) {
              throw new FS.ErrnoError(20);
            }
          } else {
            // node doesn't exist, try to create it
            node = FS.mknod(path, mode, 0);
            created = true;
          }
        }
        if (!node) {
          throw new FS.ErrnoError(44);
        }
        // can't truncate a device
        if (FS.isChrdev(node.mode)) {
          flags &= ~512;
        }
        // if asked only for a directory, then this must be one
        if ((flags & 65536) && !FS.isDir(node.mode)) {
          throw new FS.ErrnoError(54);
        }
        // check permissions, if this is not a file we just created now (it is ok to
        // create and write to a file with read-only permissions; it is read-only
        // for later use)
        if (!created) {
          var errCode = FS.mayOpen(node, flags);
          if (errCode) {
            throw new FS.ErrnoError(errCode);
          }
        }
        // do truncation if necessary
        if ((flags & 512) && !created) {
          FS.truncate(node, 0);
        }
        // we've already handled these, don't pass down to the underlying vfs
        flags &= ~(128 | 512 | 131072);
  
        // register the stream with the filesystem
        var stream = FS.createStream({
          node,
          path: FS.getPath(node),  // we want the absolute path to the node
          flags,
          seekable: true,
          position: 0,
          stream_ops: node.stream_ops,
          // used by the file family libc calls (fopen, fwrite, ferror, etc.)
          ungotten: [],
          error: false
        });
        // call the new stream's open function
        if (stream.stream_ops.open) {
          stream.stream_ops.open(stream);
        }
        if (Module['logReadFiles'] && !(flags & 1)) {
          if (!FS.readFiles) FS.readFiles = {};
          if (!(path in FS.readFiles)) {
            FS.readFiles[path] = 1;
          }
        }
        return stream;
      },close:(stream) => {
        if (FS.isClosed(stream)) {
          throw new FS.ErrnoError(8);
        }
        if (stream.getdents) stream.getdents = null; // free readdir state
        try {
          if (stream.stream_ops.close) {
            stream.stream_ops.close(stream);
          }
        } catch (e) {
          throw e;
        } finally {
          FS.closeStream(stream.fd);
        }
        stream.fd = null;
      },isClosed:(stream) => {
        return stream.fd === null;
      },llseek:(stream, offset, whence) => {
        if (FS.isClosed(stream)) {
          throw new FS.ErrnoError(8);
        }
        if (!stream.seekable || !stream.stream_ops.llseek) {
          throw new FS.ErrnoError(70);
        }
        if (whence != 0 && whence != 1 && whence != 2) {
          throw new FS.ErrnoError(28);
        }
        stream.position = stream.stream_ops.llseek(stream, offset, whence);
        stream.ungotten = [];
        return stream.position;
      },read:(stream, buffer, offset, length, position) => {
        if (length < 0 || position < 0) {
          throw new FS.ErrnoError(28);
        }
        if (FS.isClosed(stream)) {
          throw new FS.ErrnoError(8);
        }
        if ((stream.flags & 2097155) === 1) {
          throw new FS.ErrnoError(8);
        }
        if (FS.isDir(stream.node.mode)) {
          throw new FS.ErrnoError(31);
        }
        if (!stream.stream_ops.read) {
          throw new FS.ErrnoError(28);
        }
        var seeking = typeof position != 'undefined';
        if (!seeking) {
          position = stream.position;
        } else if (!stream.seekable) {
          throw new FS.ErrnoError(70);
        }
        var bytesRead = stream.stream_ops.read(stream, buffer, offset, length, position);
        if (!seeking) stream.position += bytesRead;
        return bytesRead;
      },write:(stream, buffer, offset, length, position, canOwn) => {
        if (length < 0 || position < 0) {
          throw new FS.ErrnoError(28);
        }
        if (FS.isClosed(stream)) {
          throw new FS.ErrnoError(8);
        }
        if ((stream.flags & 2097155) === 0) {
          throw new FS.ErrnoError(8);
        }
        if (FS.isDir(stream.node.mode)) {
          throw new FS.ErrnoError(31);
        }
        if (!stream.stream_ops.write) {
          throw new FS.ErrnoError(28);
        }
        if (stream.seekable && stream.flags & 1024) {
          // seek to the end before writing in append mode
          FS.llseek(stream, 0, 2);
        }
        var seeking = typeof position != 'undefined';
        if (!seeking) {
          position = stream.position;
        } else if (!stream.seekable) {
          throw new FS.ErrnoError(70);
        }
        var bytesWritten = stream.stream_ops.write(stream, buffer, offset, length, position, canOwn);
        if (!seeking) stream.position += bytesWritten;
        return bytesWritten;
      },allocate:(stream, offset, length) => {
        if (FS.isClosed(stream)) {
          throw new FS.ErrnoError(8);
        }
        if (offset < 0 || length <= 0) {
          throw new FS.ErrnoError(28);
        }
        if ((stream.flags & 2097155) === 0) {
          throw new FS.ErrnoError(8);
        }
        if (!FS.isFile(stream.node.mode) && !FS.isDir(stream.node.mode)) {
          throw new FS.ErrnoError(43);
        }
        if (!stream.stream_ops.allocate) {
          throw new FS.ErrnoError(138);
        }
        stream.stream_ops.allocate(stream, offset, length);
      },mmap:(stream, length, position, prot, flags) => {
        // User requests writing to file (prot & PROT_WRITE != 0).
        // Checking if we have permissions to write to the file unless
        // MAP_PRIVATE flag is set. According to POSIX spec it is possible
        // to write to file opened in read-only mode with MAP_PRIVATE flag,
        // as all modifications will be visible only in the memory of
        // the current process.
        if ((prot & 2) !== 0
            && (flags & 2) === 0
            && (stream.flags & 2097155) !== 2) {
          throw new FS.ErrnoError(2);
        }
        if ((stream.flags & 2097155) === 1) {
          throw new FS.ErrnoError(2);
        }
        if (!stream.stream_ops.mmap) {
          throw new FS.ErrnoError(43);
        }
        return stream.stream_ops.mmap(stream, length, position, prot, flags);
      },msync:(stream, buffer, offset, length, mmapFlags) => {
        if (!stream.stream_ops.msync) {
          return 0;
        }
        return stream.stream_ops.msync(stream, buffer, offset, length, mmapFlags);
      },munmap:(stream) => 0,ioctl:(stream, cmd, arg) => {
        if (!stream.stream_ops.ioctl) {
          throw new FS.ErrnoError(59);
        }
        return stream.stream_ops.ioctl(stream, cmd, arg);
      },readFile:(path, opts = {}) => {
        opts.flags = opts.flags || 0;
        opts.encoding = opts.encoding || 'binary';
        if (opts.encoding !== 'utf8' && opts.encoding !== 'binary') {
          throw new Error(`Invalid encoding type "${opts.encoding}"`);
        }
        var ret;
        var stream = FS.open(path, opts.flags);
        var stat = FS.stat(path);
        var length = stat.size;
        var buf = new Uint8Array(length);
        FS.read(stream, buf, 0, length, 0);
        if (opts.encoding === 'utf8') {
          ret = UTF8ArrayToString(buf, 0);
        } else if (opts.encoding === 'binary') {
          ret = buf;
        }
        FS.close(stream);
        return ret;
      },writeFile:(path, data, opts = {}) => {
        opts.flags = opts.flags || 577;
        var stream = FS.open(path, opts.flags, opts.mode);
        if (typeof data == 'string') {
          var buf = new Uint8Array(lengthBytesUTF8(data)+1);
          var actualNumBytes = stringToUTF8Array(data, buf, 0, buf.length);
          FS.write(stream, buf, 0, actualNumBytes, undefined, opts.canOwn);
        } else if (ArrayBuffer.isView(data)) {
          FS.write(stream, data, 0, data.byteLength, undefined, opts.canOwn);
        } else {
          throw new Error('Unsupported data type');
        }
        FS.close(stream);
      },cwd:() => FS.currentPath,chdir:(path) => {
        var lookup = FS.lookupPath(path, { follow: true });
        if (lookup.node === null) {
          throw new FS.ErrnoError(44);
        }
        if (!FS.isDir(lookup.node.mode)) {
          throw new FS.ErrnoError(54);
        }
        var errCode = FS.nodePermissions(lookup.node, 'x');
        if (errCode) {
          throw new FS.ErrnoError(errCode);
        }
        FS.currentPath = lookup.path;
      },createDefaultDirectories:() => {
        FS.mkdir('/tmp');
        FS.mkdir('/home');
        FS.mkdir('/home/web_user');
      },createDefaultDevices:() => {
        // create /dev
        FS.mkdir('/dev');
        // setup /dev/null
        FS.registerDevice(FS.makedev(1, 3), {
          read: () => 0,
          write: (stream, buffer, offset, length, pos) => length,
        });
        FS.mkdev('/dev/null', FS.makedev(1, 3));
        // setup /dev/tty and /dev/tty1
        // stderr needs to print output using err() rather than out()
        // so we register a second tty just for it.
        TTY.register(FS.makedev(5, 0), TTY.default_tty_ops);
        TTY.register(FS.makedev(6, 0), TTY.default_tty1_ops);
        FS.mkdev('/dev/tty', FS.makedev(5, 0));
        FS.mkdev('/dev/tty1', FS.makedev(6, 0));
        // setup /dev/[u]random
        // use a buffer to avoid overhead of individual crypto calls per byte
        var randomBuffer = new Uint8Array(1024), randomLeft = 0;
        var randomByte = () => {
          if (randomLeft === 0) {
            randomLeft = randomFill(randomBuffer).byteLength;
          }
          return randomBuffer[--randomLeft];
        };
        FS.createDevice('/dev', 'random', randomByte);
        FS.createDevice('/dev', 'urandom', randomByte);
        // we're not going to emulate the actual shm device,
        // just create the tmp dirs that reside in it commonly
        FS.mkdir('/dev/shm');
        FS.mkdir('/dev/shm/tmp');
      },createSpecialDirectories:() => {
        // create /proc/self/fd which allows /proc/self/fd/6 => readlink gives the
        // name of the stream for fd 6 (see test_unistd_ttyname)
        FS.mkdir('/proc');
        var proc_self = FS.mkdir('/proc/self');
        FS.mkdir('/proc/self/fd');
        FS.mount({
          mount: () => {
            var node = FS.createNode(proc_self, 'fd', 16384 | 511 /* 0777 */, 73);
            node.node_ops = {
              lookup: (parent, name) => {
                var fd = +name;
                var stream = FS.getStreamChecked(fd);
                var ret = {
                  parent: null,
                  mount: { mountpoint: 'fake' },
                  node_ops: { readlink: () => stream.path },
                };
                ret.parent = ret; // make it look like a simple root node
                return ret;
              }
            };
            return node;
          }
        }, {}, '/proc/self/fd');
      },createStandardStreams:() => {
        // TODO deprecate the old functionality of a single
        // input / output callback and that utilizes FS.createDevice
        // and instead require a unique set of stream ops
  
        // by default, we symlink the standard streams to the
        // default tty devices. however, if the standard streams
        // have been overwritten we create a unique device for
        // them instead.
        if (Module['stdin']) {
          FS.createDevice('/dev', 'stdin', Module['stdin']);
        } else {
          FS.symlink('/dev/tty', '/dev/stdin');
        }
        if (Module['stdout']) {
          FS.createDevice('/dev', 'stdout', null, Module['stdout']);
        } else {
          FS.symlink('/dev/tty', '/dev/stdout');
        }
        if (Module['stderr']) {
          FS.createDevice('/dev', 'stderr', null, Module['stderr']);
        } else {
          FS.symlink('/dev/tty1', '/dev/stderr');
        }
  
        // open default streams for the stdin, stdout and stderr devices
        var stdin = FS.open('/dev/stdin', 0);
        var stdout = FS.open('/dev/stdout', 1);
        var stderr = FS.open('/dev/stderr', 1);
        assert(stdin.fd === 0, `invalid handle for stdin (${stdin.fd})`);
        assert(stdout.fd === 1, `invalid handle for stdout (${stdout.fd})`);
        assert(stderr.fd === 2, `invalid handle for stderr (${stderr.fd})`);
      },ensureErrnoError:() => {
        if (FS.ErrnoError) return;
        FS.ErrnoError = /** @this{Object} */ function ErrnoError(errno, node) {
          // We set the `name` property to be able to identify `FS.ErrnoError`
          // - the `name` is a standard ECMA-262 property of error objects. Kind of good to have it anyway.
          // - when using PROXYFS, an error can come from an underlying FS
          // as different FS objects have their own FS.ErrnoError each,
          // the test `err instanceof FS.ErrnoError` won't detect an error coming from another filesystem, causing bugs.
          // we'll use the reliable test `err.name == "ErrnoError"` instead
          this.name = 'ErrnoError';
          this.node = node;
          this.setErrno = /** @this{Object} */ function(errno) {
            this.errno = errno;
            for (var key in ERRNO_CODES) {
              if (ERRNO_CODES[key] === errno) {
                this.code = key;
                break;
              }
            }
          };
          this.setErrno(errno);
          this.message = ERRNO_MESSAGES[errno];
  
          // Try to get a maximally helpful stack trace. On Node.js, getting Error.stack
          // now ensures it shows what we want.
          if (this.stack) {
            // Define the stack property for Node.js 4, which otherwise errors on the next line.
            Object.defineProperty(this, "stack", { value: (new Error).stack, writable: true });
            this.stack = demangleAll(this.stack);
          }
        };
        FS.ErrnoError.prototype = new Error();
        FS.ErrnoError.prototype.constructor = FS.ErrnoError;
        // Some errors may happen quite a bit, to avoid overhead we reuse them (and suffer a lack of stack info)
        [44].forEach((code) => {
          FS.genericErrors[code] = new FS.ErrnoError(code);
          FS.genericErrors[code].stack = '<generic error, no stack>';
        });
      },staticInit:() => {
        FS.ensureErrnoError();
  
        FS.nameTable = new Array(4096);
  
        FS.mount(MEMFS, {}, '/');
  
        FS.createDefaultDirectories();
        FS.createDefaultDevices();
        FS.createSpecialDirectories();
  
        FS.filesystems = {
          'MEMFS': MEMFS,
        };
      },init:(input, output, error) => {
        assert(!FS.init.initialized, 'FS.init was previously called. If you want to initialize later with custom parameters, remove any earlier calls (note that one is automatically added to the generated code)');
        FS.init.initialized = true;
  
        FS.ensureErrnoError();
  
        // Allow Module.stdin etc. to provide defaults, if none explicitly passed to us here
        Module['stdin'] = input || Module['stdin'];
        Module['stdout'] = output || Module['stdout'];
        Module['stderr'] = error || Module['stderr'];
  
        FS.createStandardStreams();
      },quit:() => {
        FS.init.initialized = false;
        // force-flush all streams, so we get musl std streams printed out
        _fflush(0);
        // close all of our streams
        for (var i = 0; i < FS.streams.length; i++) {
          var stream = FS.streams[i];
          if (!stream) {
            continue;
          }
          FS.close(stream);
        }
      },findObject:(path, dontResolveLastLink) => {
        var ret = FS.analyzePath(path, dontResolveLastLink);
        if (!ret.exists) {
          return null;
        }
        return ret.object;
      },analyzePath:(path, dontResolveLastLink) => {
        // operate from within the context of the symlink's target
        try {
          var lookup = FS.lookupPath(path, { follow: !dontResolveLastLink });
          path = lookup.path;
        } catch (e) {
        }
        var ret = {
          isRoot: false, exists: false, error: 0, name: null, path: null, object: null,
          parentExists: false, parentPath: null, parentObject: null
        };
        try {
          var lookup = FS.lookupPath(path, { parent: true });
          ret.parentExists = true;
          ret.parentPath = lookup.path;
          ret.parentObject = lookup.node;
          ret.name = PATH.basename(path);
          lookup = FS.lookupPath(path, { follow: !dontResolveLastLink });
          ret.exists = true;
          ret.path = lookup.path;
          ret.object = lookup.node;
          ret.name = lookup.node.name;
          ret.isRoot = lookup.path === '/';
        } catch (e) {
          ret.error = e.errno;
        };
        return ret;
      },createPath:(parent, path, canRead, canWrite) => {
        parent = typeof parent == 'string' ? parent : FS.getPath(parent);
        var parts = path.split('/').reverse();
        while (parts.length) {
          var part = parts.pop();
          if (!part) continue;
          var current = PATH.join2(parent, part);
          try {
            FS.mkdir(current);
          } catch (e) {
            // ignore EEXIST
          }
          parent = current;
        }
        return current;
      },createFile:(parent, name, properties, canRead, canWrite) => {
        var path = PATH.join2(typeof parent == 'string' ? parent : FS.getPath(parent), name);
        var mode = FS_getMode(canRead, canWrite);
        return FS.create(path, mode);
      },createDataFile:(parent, name, data, canRead, canWrite, canOwn) => {
        var path = name;
        if (parent) {
          parent = typeof parent == 'string' ? parent : FS.getPath(parent);
          path = name ? PATH.join2(parent, name) : parent;
        }
        var mode = FS_getMode(canRead, canWrite);
        var node = FS.create(path, mode);
        if (data) {
          if (typeof data == 'string') {
            var arr = new Array(data.length);
            for (var i = 0, len = data.length; i < len; ++i) arr[i] = data.charCodeAt(i);
            data = arr;
          }
          // make sure we can write to the file
          FS.chmod(node, mode | 146);
          var stream = FS.open(node, 577);
          FS.write(stream, data, 0, data.length, 0, canOwn);
          FS.close(stream);
          FS.chmod(node, mode);
        }
        return node;
      },createDevice:(parent, name, input, output) => {
        var path = PATH.join2(typeof parent == 'string' ? parent : FS.getPath(parent), name);
        var mode = FS_getMode(!!input, !!output);
        if (!FS.createDevice.major) FS.createDevice.major = 64;
        var dev = FS.makedev(FS.createDevice.major++, 0);
        // Create a fake device that a set of stream ops to emulate
        // the old behavior.
        FS.registerDevice(dev, {
          open: (stream) => {
            stream.seekable = false;
          },
          close: (stream) => {
            // flush any pending line data
            if (output && output.buffer && output.buffer.length) {
              output(10);
            }
          },
          read: (stream, buffer, offset, length, pos /* ignored */) => {
            var bytesRead = 0;
            for (var i = 0; i < length; i++) {
              var result;
              try {
                result = input();
              } catch (e) {
                throw new FS.ErrnoError(29);
              }
              if (result === undefined && bytesRead === 0) {
                throw new FS.ErrnoError(6);
              }
              if (result === null || result === undefined) break;
              bytesRead++;
              buffer[offset+i] = result;
            }
            if (bytesRead) {
              stream.node.timestamp = Date.now();
            }
            return bytesRead;
          },
          write: (stream, buffer, offset, length, pos) => {
            for (var i = 0; i < length; i++) {
              try {
                output(buffer[offset+i]);
              } catch (e) {
                throw new FS.ErrnoError(29);
              }
            }
            if (length) {
              stream.node.timestamp = Date.now();
            }
            return i;
          }
        });
        return FS.mkdev(path, mode, dev);
      },forceLoadFile:(obj) => {
        if (obj.isDevice || obj.isFolder || obj.link || obj.contents) return true;
        if (typeof XMLHttpRequest != 'undefined') {
          throw new Error("Lazy loading should have been performed (contents set) in createLazyFile, but it was not. Lazy loading only works in web workers. Use --embed-file or --preload-file in emcc on the main thread.");
        } else if (read_) {
          // Command-line.
          try {
            // WARNING: Can't read binary files in V8's d8 or tracemonkey's js, as
            //          read() will try to parse UTF8.
            obj.contents = intArrayFromString(read_(obj.url), true);
            obj.usedBytes = obj.contents.length;
          } catch (e) {
            throw new FS.ErrnoError(29);
          }
        } else {
          throw new Error('Cannot load without read() or XMLHttpRequest.');
        }
      },createLazyFile:(parent, name, url, canRead, canWrite) => {
        // Lazy chunked Uint8Array (implements get and length from Uint8Array). Actual getting is abstracted away for eventual reuse.
        /** @constructor */
        function LazyUint8Array() {
          this.lengthKnown = false;
          this.chunks = []; // Loaded chunks. Index is the chunk number
        }
        LazyUint8Array.prototype.get = /** @this{Object} */ function LazyUint8Array_get(idx) {
          if (idx > this.length-1 || idx < 0) {
            return undefined;
          }
          var chunkOffset = idx % this.chunkSize;
          var chunkNum = (idx / this.chunkSize)|0;
          return this.getter(chunkNum)[chunkOffset];
        };
        LazyUint8Array.prototype.setDataGetter = function LazyUint8Array_setDataGetter(getter) {
          this.getter = getter;
        };
        LazyUint8Array.prototype.cacheLength = function LazyUint8Array_cacheLength() {
          // Find length
          var xhr = new XMLHttpRequest();
          xhr.open('HEAD', url, false);
          xhr.send(null);
          if (!(xhr.status >= 200 && xhr.status < 300 || xhr.status === 304)) throw new Error("Couldn't load " + url + ". Status: " + xhr.status);
          var datalength = Number(xhr.getResponseHeader("Content-length"));
          var header;
          var hasByteServing = (header = xhr.getResponseHeader("Accept-Ranges")) && header === "bytes";
          var usesGzip = (header = xhr.getResponseHeader("Content-Encoding")) && header === "gzip";
  
          var chunkSize = 1024*1024; // Chunk size in bytes
  
          if (!hasByteServing) chunkSize = datalength;
  
          // Function to get a range from the remote URL.
          var doXHR = (from, to) => {
            if (from > to) throw new Error("invalid range (" + from + ", " + to + ") or no bytes requested!");
            if (to > datalength-1) throw new Error("only " + datalength + " bytes available! programmer error!");
  
            // TODO: Use mozResponseArrayBuffer, responseStream, etc. if available.
            var xhr = new XMLHttpRequest();
            xhr.open('GET', url, false);
            if (datalength !== chunkSize) xhr.setRequestHeader("Range", "bytes=" + from + "-" + to);
  
            // Some hints to the browser that we want binary data.
            xhr.responseType = 'arraybuffer';
            if (xhr.overrideMimeType) {
              xhr.overrideMimeType('text/plain; charset=x-user-defined');
            }
  
            xhr.send(null);
            if (!(xhr.status >= 200 && xhr.status < 300 || xhr.status === 304)) throw new Error("Couldn't load " + url + ". Status: " + xhr.status);
            if (xhr.response !== undefined) {
              return new Uint8Array(/** @type{Array<number>} */(xhr.response || []));
            }
            return intArrayFromString(xhr.responseText || '', true);
          };
          var lazyArray = this;
          lazyArray.setDataGetter((chunkNum) => {
            var start = chunkNum * chunkSize;
            var end = (chunkNum+1) * chunkSize - 1; // including this byte
            end = Math.min(end, datalength-1); // if datalength-1 is selected, this is the last block
            if (typeof lazyArray.chunks[chunkNum] == 'undefined') {
              lazyArray.chunks[chunkNum] = doXHR(start, end);
            }
            if (typeof lazyArray.chunks[chunkNum] == 'undefined') throw new Error('doXHR failed!');
            return lazyArray.chunks[chunkNum];
          });
  
          if (usesGzip || !datalength) {
            // if the server uses gzip or doesn't supply the length, we have to download the whole file to get the (uncompressed) length
            chunkSize = datalength = 1; // this will force getter(0)/doXHR do download the whole file
            datalength = this.getter(0).length;
            chunkSize = datalength;
            out("LazyFiles on gzip forces download of the whole file when length is accessed");
          }
  
          this._length = datalength;
          this._chunkSize = chunkSize;
          this.lengthKnown = true;
        };
        if (typeof XMLHttpRequest != 'undefined') {
          if (!ENVIRONMENT_IS_WORKER) throw 'Cannot do synchronous binary XHRs outside webworkers in modern browsers. Use --embed-file or --preload-file in emcc';
          var lazyArray = new LazyUint8Array();
          Object.defineProperties(lazyArray, {
            length: {
              get: /** @this{Object} */ function() {
                if (!this.lengthKnown) {
                  this.cacheLength();
                }
                return this._length;
              }
            },
            chunkSize: {
              get: /** @this{Object} */ function() {
                if (!this.lengthKnown) {
                  this.cacheLength();
                }
                return this._chunkSize;
              }
            }
          });
  
          var properties = { isDevice: false, contents: lazyArray };
        } else {
          var properties = { isDevice: false, url: url };
        }
  
        var node = FS.createFile(parent, name, properties, canRead, canWrite);
        // This is a total hack, but I want to get this lazy file code out of the
        // core of MEMFS. If we want to keep this lazy file concept I feel it should
        // be its own thin LAZYFS proxying calls to MEMFS.
        if (properties.contents) {
          node.contents = properties.contents;
        } else if (properties.url) {
          node.contents = null;
          node.url = properties.url;
        }
        // Add a function that defers querying the file size until it is asked the first time.
        Object.defineProperties(node, {
          usedBytes: {
            get: /** @this {FSNode} */ function() { return this.contents.length; }
          }
        });
        // override each stream op with one that tries to force load the lazy file first
        var stream_ops = {};
        var keys = Object.keys(node.stream_ops);
        keys.forEach((key) => {
          var fn = node.stream_ops[key];
          stream_ops[key] = function forceLoadLazyFile() {
            FS.forceLoadFile(node);
            return fn.apply(null, arguments);
          };
        });
        function writeChunks(stream, buffer, offset, length, position) {
          var contents = stream.node.contents;
          if (position >= contents.length)
            return 0;
          var size = Math.min(contents.length - position, length);
          assert(size >= 0);
          if (contents.slice) { // normal array
            for (var i = 0; i < size; i++) {
              buffer[offset + i] = contents[position + i];
            }
          } else {
            for (var i = 0; i < size; i++) { // LazyUint8Array from sync binary XHR
              buffer[offset + i] = contents.get(position + i);
            }
          }
          return size;
        }
        // use a custom read function
        stream_ops.read = (stream, buffer, offset, length, position) => {
          FS.forceLoadFile(node);
          return writeChunks(stream, buffer, offset, length, position)
        };
        // use a custom mmap function
        stream_ops.mmap = (stream, length, position, prot, flags) => {
          FS.forceLoadFile(node);
          var ptr = mmapAlloc(length);
          if (!ptr) {
            throw new FS.ErrnoError(48);
          }
          writeChunks(stream, HEAP8, ptr, length, position);
          return { ptr, allocated: true };
        };
        node.stream_ops = stream_ops;
        return node;
      },absolutePath:() => {
        abort('FS.absolutePath has been removed; use PATH_FS.resolve instead');
      },createFolder:() => {
        abort('FS.createFolder has been removed; use FS.mkdir instead');
      },createLink:() => {
        abort('FS.createLink has been removed; use FS.symlink instead');
      },joinPath:() => {
        abort('FS.joinPath has been removed; use PATH.join instead');
      },mmapAlloc:() => {
        abort('FS.mmapAlloc has been replaced by the top level function mmapAlloc');
      },standardizePath:() => {
        abort('FS.standardizePath has been removed; use PATH.normalize instead');
      }};
  
  
    /**
     * Given a pointer 'ptr' to a null-terminated UTF8-encoded string in the
     * emscripten HEAP, returns a copy of that string as a Javascript String object.
     *
     * @param {number} ptr
     * @param {number=} maxBytesToRead - An optional length that specifies the
     *   maximum number of bytes to read. You can omit this parameter to scan the
     *   string until the first 0 byte. If maxBytesToRead is passed, and the string
     *   at [ptr, ptr+maxBytesToReadr[ contains a null byte in the middle, then the
     *   string will cut short at that byte index (i.e. maxBytesToRead will not
     *   produce a string of exact length [ptr, ptr+maxBytesToRead[) N.B. mixing
     *   frequent uses of UTF8ToString() with and without maxBytesToRead may throw
     *   JS JIT optimizations off, so it is worth to consider consistently using one
     * @return {string}
     */
  var UTF8ToString = (ptr, maxBytesToRead) => {
      assert(typeof ptr == 'number');
      return ptr ? UTF8ArrayToString(HEAPU8, ptr, maxBytesToRead) : '';
    };
  var SYSCALLS = {DEFAULT_POLLMASK:5,calculateAt:function(dirfd, path, allowEmpty) {
        if (PATH.isAbs(path)) {
          return path;
        }
        // relative path
        var dir;
        if (dirfd === -100) {
          dir = FS.cwd();
        } else {
          var dirstream = SYSCALLS.getStreamFromFD(dirfd);
          dir = dirstream.path;
        }
        if (path.length == 0) {
          if (!allowEmpty) {
            throw new FS.ErrnoError(44);;
          }
          return dir;
        }
        return PATH.join2(dir, path);
      },doStat:function(func, path, buf) {
        try {
          var stat = func(path);
        } catch (e) {
          if (e && e.node && PATH.normalize(path) !== PATH.normalize(FS.getPath(e.node))) {
            // an error occurred while trying to look up the path; we should just report ENOTDIR
            return -54;
          }
          throw e;
        }
        HEAP32[((buf)>>2)] = stat.dev;
        HEAP32[(((buf)+(4))>>2)] = stat.mode;
        HEAPU32[(((buf)+(8))>>2)] = stat.nlink;
        HEAP32[(((buf)+(12))>>2)] = stat.uid;
        HEAP32[(((buf)+(16))>>2)] = stat.gid;
        HEAP32[(((buf)+(20))>>2)] = stat.rdev;
        (tempI64 = [stat.size>>>0,(tempDouble=stat.size,(+(Math.abs(tempDouble))) >= 1.0 ? (tempDouble > 0.0 ? (+(Math.floor((tempDouble)/4294967296.0)))>>>0 : (~~((+(Math.ceil((tempDouble - +(((~~(tempDouble)))>>>0))/4294967296.0)))))>>>0) : 0)], HEAP32[(((buf)+(24))>>2)] = tempI64[0],HEAP32[(((buf)+(28))>>2)] = tempI64[1]);
        HEAP32[(((buf)+(32))>>2)] = 4096;
        HEAP32[(((buf)+(36))>>2)] = stat.blocks;
        var atime = stat.atime.getTime();
        var mtime = stat.mtime.getTime();
        var ctime = stat.ctime.getTime();
        (tempI64 = [Math.floor(atime / 1000)>>>0,(tempDouble=Math.floor(atime / 1000),(+(Math.abs(tempDouble))) >= 1.0 ? (tempDouble > 0.0 ? (+(Math.floor((tempDouble)/4294967296.0)))>>>0 : (~~((+(Math.ceil((tempDouble - +(((~~(tempDouble)))>>>0))/4294967296.0)))))>>>0) : 0)], HEAP32[(((buf)+(40))>>2)] = tempI64[0],HEAP32[(((buf)+(44))>>2)] = tempI64[1]);
        HEAPU32[(((buf)+(48))>>2)] = (atime % 1000) * 1000;
        (tempI64 = [Math.floor(mtime / 1000)>>>0,(tempDouble=Math.floor(mtime / 1000),(+(Math.abs(tempDouble))) >= 1.0 ? (tempDouble > 0.0 ? (+(Math.floor((tempDouble)/4294967296.0)))>>>0 : (~~((+(Math.ceil((tempDouble - +(((~~(tempDouble)))>>>0))/4294967296.0)))))>>>0) : 0)], HEAP32[(((buf)+(56))>>2)] = tempI64[0],HEAP32[(((buf)+(60))>>2)] = tempI64[1]);
        HEAPU32[(((buf)+(64))>>2)] = (mtime % 1000) * 1000;
        (tempI64 = [Math.floor(ctime / 1000)>>>0,(tempDouble=Math.floor(ctime / 1000),(+(Math.abs(tempDouble))) >= 1.0 ? (tempDouble > 0.0 ? (+(Math.floor((tempDouble)/4294967296.0)))>>>0 : (~~((+(Math.ceil((tempDouble - +(((~~(tempDouble)))>>>0))/4294967296.0)))))>>>0) : 0)], HEAP32[(((buf)+(72))>>2)] = tempI64[0],HEAP32[(((buf)+(76))>>2)] = tempI64[1]);
        HEAPU32[(((buf)+(80))>>2)] = (ctime % 1000) * 1000;
        (tempI64 = [stat.ino>>>0,(tempDouble=stat.ino,(+(Math.abs(tempDouble))) >= 1.0 ? (tempDouble > 0.0 ? (+(Math.floor((tempDouble)/4294967296.0)))>>>0 : (~~((+(Math.ceil((tempDouble - +(((~~(tempDouble)))>>>0))/4294967296.0)))))>>>0) : 0)], HEAP32[(((buf)+(88))>>2)] = tempI64[0],HEAP32[(((buf)+(92))>>2)] = tempI64[1]);
        return 0;
      },doMsync:function(addr, stream, len, flags, offset) {
        if (!FS.isFile(stream.node.mode)) {
          throw new FS.ErrnoError(43);
        }
        if (flags & 2) {
          // MAP_PRIVATE calls need not to be synced back to underlying fs
          return 0;
        }
        var buffer = HEAPU8.slice(addr, addr + len);
        FS.msync(stream, buffer, offset, len, flags);
      },varargs:undefined,get:function() {
        assert(SYSCALLS.varargs != undefined);
        SYSCALLS.varargs += 4;
        var ret = HEAP32[(((SYSCALLS.varargs)-(4))>>2)];
        return ret;
      },getStr:function(ptr) {
        var ret = UTF8ToString(ptr);
        return ret;
      },getStreamFromFD:function(fd) {
        var stream = FS.getStreamChecked(fd);
        return stream;
      }};
  function ___syscall_fcntl64(fd, cmd, varargs) {
  SYSCALLS.varargs = varargs;
  try {
  
      var stream = SYSCALLS.getStreamFromFD(fd);
      switch (cmd) {
        case 0: {
          var arg = SYSCALLS.get();
          if (arg < 0) {
            return -28;
          }
          var newStream;
          newStream = FS.createStream(stream, arg);
          return newStream.fd;
        }
        case 1:
        case 2:
          return 0;  // FD_CLOEXEC makes no sense for a single process.
        case 3:
          return stream.flags;
        case 4: {
          var arg = SYSCALLS.get();
          stream.flags |= arg;
          return 0;
        }
        case 5:
        /* case 5: Currently in musl F_GETLK64 has same value as F_GETLK, so omitted to avoid duplicate case blocks. If that changes, uncomment this */ {
          
          var arg = SYSCALLS.get();
          var offset = 0;
          // We're always unlocked.
          HEAP16[(((arg)+(offset))>>1)] = 2;
          return 0;
        }
        case 6:
        case 7:
        /* case 6: Currently in musl F_SETLK64 has same value as F_SETLK, so omitted to avoid duplicate case blocks. If that changes, uncomment this */
        /* case 7: Currently in musl F_SETLKW64 has same value as F_SETLKW, so omitted to avoid duplicate case blocks. If that changes, uncomment this */
          
          
          return 0; // Pretend that the locking is successful.
        case 16:
        case 8:
          return -28; // These are for sockets. We don't have them fully implemented yet.
        case 9:
          // musl trusts getown return values, due to a bug where they must be, as they overlap with errors. just return -1 here, so fcntl() returns that, and we set errno ourselves.
          setErrNo(28);
          return -1;
        default: {
          return -28;
        }
      }
    } catch (e) {
    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
    return -e.errno;
  }
  }

  function ___syscall_ioctl(fd, op, varargs) {
  SYSCALLS.varargs = varargs;
  try {
  
      var stream = SYSCALLS.getStreamFromFD(fd);
      switch (op) {
        case 21509: {
          if (!stream.tty) return -59;
          return 0;
        }
        case 21505: {
          if (!stream.tty) return -59;
          if (stream.tty.ops.ioctl_tcgets) {
            var termios = stream.tty.ops.ioctl_tcgets(stream);
            var argp = SYSCALLS.get();
            HEAP32[((argp)>>2)] = termios.c_iflag || 0;
            HEAP32[(((argp)+(4))>>2)] = termios.c_oflag || 0;
            HEAP32[(((argp)+(8))>>2)] = termios.c_cflag || 0;
            HEAP32[(((argp)+(12))>>2)] = termios.c_lflag || 0;
            for (var i = 0; i < 32; i++) {
              HEAP8[(((argp + i)+(17))>>0)] = termios.c_cc[i] || 0;
            }
            return 0;
          }
          return 0;
        }
        case 21510:
        case 21511:
        case 21512: {
          if (!stream.tty) return -59;
          return 0; // no-op, not actually adjusting terminal settings
        }
        case 21506:
        case 21507:
        case 21508: {
          if (!stream.tty) return -59;
          if (stream.tty.ops.ioctl_tcsets) {
            var argp = SYSCALLS.get();
            var c_iflag = HEAP32[((argp)>>2)];
            var c_oflag = HEAP32[(((argp)+(4))>>2)];
            var c_cflag = HEAP32[(((argp)+(8))>>2)];
            var c_lflag = HEAP32[(((argp)+(12))>>2)];
            var c_cc = []
            for (var i = 0; i < 32; i++) {
              c_cc.push(HEAP8[(((argp + i)+(17))>>0)]);
            }
            return stream.tty.ops.ioctl_tcsets(stream.tty, op, { c_iflag, c_oflag, c_cflag, c_lflag, c_cc });
          }
          return 0; // no-op, not actually adjusting terminal settings
        }
        case 21519: {
          if (!stream.tty) return -59;
          var argp = SYSCALLS.get();
          HEAP32[((argp)>>2)] = 0;
          return 0;
        }
        case 21520: {
          if (!stream.tty) return -59;
          return -28; // not supported
        }
        case 21531: {
          var argp = SYSCALLS.get();
          return FS.ioctl(stream, op, argp);
        }
        case 21523: {
          // TODO: in theory we should write to the winsize struct that gets
          // passed in, but for now musl doesn't read anything on it
          if (!stream.tty) return -59;
          if (stream.tty.ops.ioctl_tiocgwinsz) {
            var winsize = stream.tty.ops.ioctl_tiocgwinsz(stream.tty);
            var argp = SYSCALLS.get();
            HEAP16[((argp)>>1)] = winsize[0];
            HEAP16[(((argp)+(2))>>1)] = winsize[1];
          }
          return 0;
        }
        case 21524: {
          // TODO: technically, this ioctl call should change the window size.
          // but, since emscripten doesn't have any concept of a terminal window
          // yet, we'll just silently throw it away as we do TIOCGWINSZ
          if (!stream.tty) return -59;
          return 0;
        }
        case 21515: {
          if (!stream.tty) return -59;
          return 0;
        }
        default: return -28; // not supported
      }
    } catch (e) {
    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
    return -e.errno;
  }
  }

  function ___syscall_openat(dirfd, path, flags, varargs) {
  SYSCALLS.varargs = varargs;
  try {
  
      path = SYSCALLS.getStr(path);
      path = SYSCALLS.calculateAt(dirfd, path);
      var mode = varargs ? SYSCALLS.get() : 0;
      return FS.open(path, flags, mode).fd;
    } catch (e) {
    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
    return -e.errno;
  }
  }

  var nowIsMonotonic = true;;
  var __emscripten_get_now_is_monotonic = () => nowIsMonotonic;

  function _emscripten_set_main_loop_timing(mode, value) {
      Browser.mainLoop.timingMode = mode;
      Browser.mainLoop.timingValue = value;
  
      if (!Browser.mainLoop.func) {
        err('emscripten_set_main_loop_timing: Cannot set timing mode for main loop since a main loop does not exist! Call emscripten_set_main_loop first to set one up.');
        return 1; // Return non-zero on failure, can't set timing mode when there is no main loop.
      }
  
      if (!Browser.mainLoop.running) {
        
        Browser.mainLoop.running = true;
      }
      if (mode == 0) {
        Browser.mainLoop.scheduler = function Browser_mainLoop_scheduler_setTimeout() {
          var timeUntilNextTick = Math.max(0, Browser.mainLoop.tickStartTime + value - _emscripten_get_now())|0;
          setTimeout(Browser.mainLoop.runner, timeUntilNextTick); // doing this each time means that on exception, we stop
        };
        Browser.mainLoop.method = 'timeout';
      } else if (mode == 1) {
        Browser.mainLoop.scheduler = function Browser_mainLoop_scheduler_rAF() {
          Browser.requestAnimationFrame(Browser.mainLoop.runner);
        };
        Browser.mainLoop.method = 'rAF';
      } else if (mode == 2) {
        if (typeof setImmediate == 'undefined') {
          // Emulate setImmediate. (note: not a complete polyfill, we don't emulate clearImmediate() to keep code size to minimum, since not needed)
          var setImmediates = [];
          var emscriptenMainLoopMessageId = 'setimmediate';
          /** @param {Event} event */
          var Browser_setImmediate_messageHandler = (event) => {
            // When called in current thread or Worker, the main loop ID is structured slightly different to accommodate for --proxy-to-worker runtime listening to Worker events,
            // so check for both cases.
            if (event.data === emscriptenMainLoopMessageId || event.data.target === emscriptenMainLoopMessageId) {
              event.stopPropagation();
              setImmediates.shift()();
            }
          };
          addEventListener("message", Browser_setImmediate_messageHandler, true);
          setImmediate = /** @type{function(function(): ?, ...?): number} */(function Browser_emulated_setImmediate(func) {
            setImmediates.push(func);
            if (ENVIRONMENT_IS_WORKER) {
              if (Module['setImmediates'] === undefined) Module['setImmediates'] = [];
              Module['setImmediates'].push(func);
              postMessage({target: emscriptenMainLoopMessageId}); // In --proxy-to-worker, route the message via proxyClient.js
            } else postMessage(emscriptenMainLoopMessageId, "*"); // On the main thread, can just send the message to itself.
          })
        }
        Browser.mainLoop.scheduler = function Browser_mainLoop_scheduler_setImmediate() {
          setImmediate(Browser.mainLoop.runner);
        };
        Browser.mainLoop.method = 'immediate';
      }
      return 0;
    }
  
  var _emscripten_get_now;
      // Modern environment where performance.now() is supported:
      // N.B. a shorter form "_emscripten_get_now = performance.now;" is
      // unfortunately not allowed even in current browsers (e.g. FF Nightly 75).
      _emscripten_get_now = () => performance.now();
  ;
  
  
    /**
     * @param {number=} arg
     * @param {boolean=} noSetTiming
     */
  function setMainLoop(browserIterationFunc, fps, simulateInfiniteLoop, arg, noSetTiming) {
      assert(!Browser.mainLoop.func, 'emscripten_set_main_loop: there can only be one main loop function at once: call emscripten_cancel_main_loop to cancel the previous one before setting a new one with different parameters.');
  
      Browser.mainLoop.func = browserIterationFunc;
      Browser.mainLoop.arg = arg;
  
      var thisMainLoopId = Browser.mainLoop.currentlyRunningMainloop;
      function checkIsRunning() {
        if (thisMainLoopId < Browser.mainLoop.currentlyRunningMainloop) {
          
          return false;
        }
        return true;
      }
  
      // We create the loop runner here but it is not actually running until
      // _emscripten_set_main_loop_timing is called (which might happen a
      // later time).  This member signifies that the current runner has not
      // yet been started so that we can call runtimeKeepalivePush when it
      // gets it timing set for the first time.
      Browser.mainLoop.running = false;
      Browser.mainLoop.runner = function Browser_mainLoop_runner() {
        if (ABORT) return;
        if (Browser.mainLoop.queue.length > 0) {
          var start = Date.now();
          var blocker = Browser.mainLoop.queue.shift();
          blocker.func(blocker.arg);
          if (Browser.mainLoop.remainingBlockers) {
            var remaining = Browser.mainLoop.remainingBlockers;
            var next = remaining%1 == 0 ? remaining-1 : Math.floor(remaining);
            if (blocker.counted) {
              Browser.mainLoop.remainingBlockers = next;
            } else {
              // not counted, but move the progress along a tiny bit
              next = next + 0.5; // do not steal all the next one's progress
              Browser.mainLoop.remainingBlockers = (8*remaining + next)/9;
            }
          }
          out('main loop blocker "' + blocker.name + '" took ' + (Date.now() - start) + ' ms'); //, left: ' + Browser.mainLoop.remainingBlockers);
          Browser.mainLoop.updateStatus();
  
          // catches pause/resume main loop from blocker execution
          if (!checkIsRunning()) return;
  
          setTimeout(Browser.mainLoop.runner, 0);
          return;
        }
  
        // catch pauses from non-main loop sources
        if (!checkIsRunning()) return;
  
        // Implement very basic swap interval control
        Browser.mainLoop.currentFrameNumber = Browser.mainLoop.currentFrameNumber + 1 | 0;
        if (Browser.mainLoop.timingMode == 1 && Browser.mainLoop.timingValue > 1 && Browser.mainLoop.currentFrameNumber % Browser.mainLoop.timingValue != 0) {
          // Not the scheduled time to render this frame - skip.
          Browser.mainLoop.scheduler();
          return;
        } else if (Browser.mainLoop.timingMode == 0) {
          Browser.mainLoop.tickStartTime = _emscripten_get_now();
        }
  
        // Signal GL rendering layer that processing of a new frame is about to start. This helps it optimize
        // VBO double-buffering and reduce GPU stalls.
  
        if (Browser.mainLoop.method === 'timeout' && Module.ctx) {
          warnOnce('Looks like you are rendering without using requestAnimationFrame for the main loop. You should use 0 for the frame rate in emscripten_set_main_loop in order to use requestAnimationFrame, as that can greatly improve your frame rates!');
          Browser.mainLoop.method = ''; // just warn once per call to set main loop
        }
  
        Browser.mainLoop.runIter(browserIterationFunc);
  
        checkStackCookie();
  
        // catch pauses from the main loop itself
        if (!checkIsRunning()) return;
  
        // Queue new audio data. This is important to be right after the main loop invocation, so that we will immediately be able
        // to queue the newest produced audio samples.
        // TODO: Consider adding pre- and post- rAF callbacks so that GL.newRenderingFrameStarted() and SDL.audio.queueNewAudioData()
        //       do not need to be hardcoded into this function, but can be more generic.
        if (typeof SDL == 'object' && SDL.audio && SDL.audio.queueNewAudioData) SDL.audio.queueNewAudioData();
  
        Browser.mainLoop.scheduler();
      }
  
      if (!noSetTiming) {
        if (fps && fps > 0) {
          _emscripten_set_main_loop_timing(0, 1000.0 / fps);
        } else {
          // Do rAF by rendering each frame (no decimating)
          _emscripten_set_main_loop_timing(1, 1);
        }
  
        Browser.mainLoop.scheduler();
      }
  
      if (simulateInfiniteLoop) {
        throw 'unwind';
      }
    }
  
  var handleException = (e) => {
      // Certain exception types we do not treat as errors since they are used for
      // internal control flow.
      // 1. ExitStatus, which is thrown by exit()
      // 2. "unwind", which is thrown by emscripten_unwind_to_js_event_loop() and others
      //    that wish to return to JS event loop.
      if (e instanceof ExitStatus || e == 'unwind') {
        return EXITSTATUS;
      }
      checkStackCookie();
      if (e instanceof WebAssembly.RuntimeError) {
        if (_emscripten_stack_get_current() <= 0) {
          err('Stack overflow detected.  You can try increasing -sSTACK_SIZE (currently set to 65536)');
        }
      }
      quit_(1, e);
    };
  
  
  var _proc_exit = (code) => {
      EXITSTATUS = code;
      if (!keepRuntimeAlive()) {
        if (Module['onExit']) Module['onExit'](code);
        ABORT = true;
      }
      quit_(code, new ExitStatus(code));
    };
  /** @suppress {duplicate } */
  /** @param {boolean|number=} implicit */
  var exitJS = (status, implicit) => {
      EXITSTATUS = status;
  
      checkUnflushedContent();
  
      // if exit() was called explicitly, warn the user if the runtime isn't actually being shut down
      if (keepRuntimeAlive() && !implicit) {
        var msg = `program exited (with status: ${status}), but keepRuntimeAlive() is set (counter=${runtimeKeepaliveCounter}) due to an async operation, so halting execution but not exiting the runtime or preventing further async execution (you can use emscripten_force_exit, if you want to force a true shutdown)`;
        err(msg);
      }
  
      _proc_exit(status);
    };
  var _exit = exitJS;
  
  var maybeExit = () => {
      if (!keepRuntimeAlive()) {
        try {
          _exit(EXITSTATUS);
        } catch (e) {
          handleException(e);
        }
      }
    };
  var callUserCallback = (func) => {
      if (ABORT) {
        err('user callback triggered after runtime exited or application aborted.  Ignoring.');
        return;
      }
      try {
        func();
        maybeExit();
      } catch (e) {
        handleException(e);
      }
    };
  
  /** @param {number=} timeout */
  var safeSetTimeout = (func, timeout) => {
      
      return setTimeout(() => {
        
        callUserCallback(func);
      }, timeout);
    };
  
  
  
  
  var Browser = {mainLoop:{running:false,scheduler:null,method:"",currentlyRunningMainloop:0,func:null,arg:0,timingMode:0,timingValue:0,currentFrameNumber:0,queue:[],pause:function() {
          Browser.mainLoop.scheduler = null;
          // Incrementing this signals the previous main loop that it's now become old, and it must return.
          Browser.mainLoop.currentlyRunningMainloop++;
        },resume:function() {
          Browser.mainLoop.currentlyRunningMainloop++;
          var timingMode = Browser.mainLoop.timingMode;
          var timingValue = Browser.mainLoop.timingValue;
          var func = Browser.mainLoop.func;
          Browser.mainLoop.func = null;
          // do not set timing and call scheduler, we will do it on the next lines
          setMainLoop(func, 0, false, Browser.mainLoop.arg, true);
          _emscripten_set_main_loop_timing(timingMode, timingValue);
          Browser.mainLoop.scheduler();
        },updateStatus:function() {
          if (Module['setStatus']) {
            var message = Module['statusMessage'] || 'Please wait...';
            var remaining = Browser.mainLoop.remainingBlockers;
            var expected = Browser.mainLoop.expectedBlockers;
            if (remaining) {
              if (remaining < expected) {
                Module['setStatus'](message + ' (' + (expected - remaining) + '/' + expected + ')');
              } else {
                Module['setStatus'](message);
              }
            } else {
              Module['setStatus']('');
            }
          }
        },runIter:function(func) {
          if (ABORT) return;
          if (Module['preMainLoop']) {
            var preRet = Module['preMainLoop']();
            if (preRet === false) {
              return; // |return false| skips a frame
            }
          }
          callUserCallback(func);
          if (Module['postMainLoop']) Module['postMainLoop']();
        }},isFullscreen:false,pointerLock:false,moduleContextCreatedCallbacks:[],workers:[],init:function() {
        if (Browser.initted) return;
        Browser.initted = true;
  
        // Support for plugins that can process preloaded files. You can add more of these to
        // your app by creating and appending to preloadPlugins.
        //
        // Each plugin is asked if it can handle a file based on the file's name. If it can,
        // it is given the file's raw data. When it is done, it calls a callback with the file's
        // (possibly modified) data. For example, a plugin might decompress a file, or it
        // might create some side data structure for use later (like an Image element, etc.).
  
        var imagePlugin = {};
        imagePlugin['canHandle'] = function imagePlugin_canHandle(name) {
          return !Module.noImageDecoding && /\.(jpg|jpeg|png|bmp)$/i.test(name);
        };
        imagePlugin['handle'] = function imagePlugin_handle(byteArray, name, onload, onerror) {
          var b = new Blob([byteArray], { type: Browser.getMimetype(name) });
          if (b.size !== byteArray.length) { // Safari bug #118630
            // Safari's Blob can only take an ArrayBuffer
            b = new Blob([(new Uint8Array(byteArray)).buffer], { type: Browser.getMimetype(name) });
          }
          var url = URL.createObjectURL(b);
          assert(typeof url == 'string', 'createObjectURL must return a url as a string');
          var img = new Image();
          img.onload = () => {
            assert(img.complete, 'Image ' + name + ' could not be decoded');
            var canvas = /** @type {!HTMLCanvasElement} */ (document.createElement('canvas'));
            canvas.width = img.width;
            canvas.height = img.height;
            var ctx = canvas.getContext('2d');
            ctx.drawImage(img, 0, 0);
            preloadedImages[name] = canvas;
            URL.revokeObjectURL(url);
            if (onload) onload(byteArray);
          };
          img.onerror = (event) => {
            out('Image ' + url + ' could not be decoded');
            if (onerror) onerror();
          };
          img.src = url;
        };
        preloadPlugins.push(imagePlugin);
  
        var audioPlugin = {};
        audioPlugin['canHandle'] = function audioPlugin_canHandle(name) {
          return !Module.noAudioDecoding && name.substr(-4) in { '.ogg': 1, '.wav': 1, '.mp3': 1 };
        };
        audioPlugin['handle'] = function audioPlugin_handle(byteArray, name, onload, onerror) {
          var done = false;
          function finish(audio) {
            if (done) return;
            done = true;
            preloadedAudios[name] = audio;
            if (onload) onload(byteArray);
          }
          function fail() {
            if (done) return;
            done = true;
            preloadedAudios[name] = new Audio(); // empty shim
            if (onerror) onerror();
          }
          var b = new Blob([byteArray], { type: Browser.getMimetype(name) });
          var url = URL.createObjectURL(b); // XXX we never revoke this!
          assert(typeof url == 'string', 'createObjectURL must return a url as a string');
          var audio = new Audio();
          audio.addEventListener('canplaythrough', () => finish(audio), false); // use addEventListener due to chromium bug 124926
          audio.onerror = function audio_onerror(event) {
            if (done) return;
            err('warning: browser could not fully decode audio ' + name + ', trying slower base64 approach');
            function encode64(data) {
              var BASE = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
              var PAD = '=';
              var ret = '';
              var leftchar = 0;
              var leftbits = 0;
              for (var i = 0; i < data.length; i++) {
                leftchar = (leftchar << 8) | data[i];
                leftbits += 8;
                while (leftbits >= 6) {
                  var curr = (leftchar >> (leftbits-6)) & 0x3f;
                  leftbits -= 6;
                  ret += BASE[curr];
                }
              }
              if (leftbits == 2) {
                ret += BASE[(leftchar&3) << 4];
                ret += PAD + PAD;
              } else if (leftbits == 4) {
                ret += BASE[(leftchar&0xf) << 2];
                ret += PAD;
              }
              return ret;
            }
            audio.src = 'data:audio/x-' + name.substr(-3) + ';base64,' + encode64(byteArray);
            finish(audio); // we don't wait for confirmation this worked - but it's worth trying
          };
          audio.src = url;
          // workaround for chrome bug 124926 - we do not always get oncanplaythrough or onerror
          safeSetTimeout(() => {
            finish(audio); // try to use it even though it is not necessarily ready to play
          }, 10000);
        };
        preloadPlugins.push(audioPlugin);
  
        // Canvas event setup
  
        function pointerLockChange() {
          Browser.pointerLock = document['pointerLockElement'] === Module['canvas'] ||
                                document['mozPointerLockElement'] === Module['canvas'] ||
                                document['webkitPointerLockElement'] === Module['canvas'] ||
                                document['msPointerLockElement'] === Module['canvas'];
        }
        var canvas = Module['canvas'];
        if (canvas) {
          // forced aspect ratio can be enabled by defining 'forcedAspectRatio' on Module
          // Module['forcedAspectRatio'] = 4 / 3;
  
          canvas.requestPointerLock = canvas['requestPointerLock'] ||
                                      canvas['mozRequestPointerLock'] ||
                                      canvas['webkitRequestPointerLock'] ||
                                      canvas['msRequestPointerLock'] ||
                                      (() => {});
          canvas.exitPointerLock = document['exitPointerLock'] ||
                                   document['mozExitPointerLock'] ||
                                   document['webkitExitPointerLock'] ||
                                   document['msExitPointerLock'] ||
                                   (() => {}); // no-op if function does not exist
          canvas.exitPointerLock = canvas.exitPointerLock.bind(document);
  
          document.addEventListener('pointerlockchange', pointerLockChange, false);
          document.addEventListener('mozpointerlockchange', pointerLockChange, false);
          document.addEventListener('webkitpointerlockchange', pointerLockChange, false);
          document.addEventListener('mspointerlockchange', pointerLockChange, false);
  
          if (Module['elementPointerLock']) {
            canvas.addEventListener("click", (ev) => {
              if (!Browser.pointerLock && Module['canvas'].requestPointerLock) {
                Module['canvas'].requestPointerLock();
                ev.preventDefault();
              }
            }, false);
          }
        }
      },createContext:function(/** @type {HTMLCanvasElement} */ canvas, useWebGL, setInModule, webGLContextAttributes) {
        if (useWebGL && Module.ctx && canvas == Module.canvas) return Module.ctx; // no need to recreate GL context if it's already been created for this canvas.
  
        var ctx;
        var contextHandle;
        if (useWebGL) {
          // For GLES2/desktop GL compatibility, adjust a few defaults to be different to WebGL defaults, so that they align better with the desktop defaults.
          var contextAttributes = {
            antialias: false,
            alpha: false,
            majorVersion: 1,
          };
  
          if (webGLContextAttributes) {
            for (var attribute in webGLContextAttributes) {
              contextAttributes[attribute] = webGLContextAttributes[attribute];
            }
          }
  
          // This check of existence of GL is here to satisfy Closure compiler, which yells if variable GL is referenced below but GL object is not
          // actually compiled in because application is not doing any GL operations. TODO: Ideally if GL is not being used, this function
          // Browser.createContext() should not even be emitted.
          if (typeof GL != 'undefined') {
            contextHandle = GL.createContext(canvas, contextAttributes);
            if (contextHandle) {
              ctx = GL.getContext(contextHandle).GLctx;
            }
          }
        } else {
          ctx = canvas.getContext('2d');
        }
  
        if (!ctx) return null;
  
        if (setInModule) {
          if (!useWebGL) assert(typeof GLctx == 'undefined', 'cannot set in module if GLctx is used, but we are a non-GL context that would replace it');
  
          Module.ctx = ctx;
          if (useWebGL) GL.makeContextCurrent(contextHandle);
          Module.useWebGL = useWebGL;
          Browser.moduleContextCreatedCallbacks.forEach((callback) => callback());
          Browser.init();
        }
        return ctx;
      },destroyContext:function(canvas, useWebGL, setInModule) {},fullscreenHandlersInstalled:false,lockPointer:undefined,resizeCanvas:undefined,requestFullscreen:function(lockPointer, resizeCanvas) {
        Browser.lockPointer = lockPointer;
        Browser.resizeCanvas = resizeCanvas;
        if (typeof Browser.lockPointer == 'undefined') Browser.lockPointer = true;
        if (typeof Browser.resizeCanvas == 'undefined') Browser.resizeCanvas = false;
  
        var canvas = Module['canvas'];
        function fullscreenChange() {
          Browser.isFullscreen = false;
          var canvasContainer = canvas.parentNode;
          if ((document['fullscreenElement'] || document['mozFullScreenElement'] ||
               document['msFullscreenElement'] || document['webkitFullscreenElement'] ||
               document['webkitCurrentFullScreenElement']) === canvasContainer) {
            canvas.exitFullscreen = Browser.exitFullscreen;
            if (Browser.lockPointer) canvas.requestPointerLock();
            Browser.isFullscreen = true;
            if (Browser.resizeCanvas) {
              Browser.setFullscreenCanvasSize();
            } else {
              Browser.updateCanvasDimensions(canvas);
            }
          } else {
            // remove the full screen specific parent of the canvas again to restore the HTML structure from before going full screen
            canvasContainer.parentNode.insertBefore(canvas, canvasContainer);
            canvasContainer.parentNode.removeChild(canvasContainer);
  
            if (Browser.resizeCanvas) {
              Browser.setWindowedCanvasSize();
            } else {
              Browser.updateCanvasDimensions(canvas);
            }
          }
          if (Module['onFullScreen']) Module['onFullScreen'](Browser.isFullscreen);
          if (Module['onFullscreen']) Module['onFullscreen'](Browser.isFullscreen);
        }
  
        if (!Browser.fullscreenHandlersInstalled) {
          Browser.fullscreenHandlersInstalled = true;
          document.addEventListener('fullscreenchange', fullscreenChange, false);
          document.addEventListener('mozfullscreenchange', fullscreenChange, false);
          document.addEventListener('webkitfullscreenchange', fullscreenChange, false);
          document.addEventListener('MSFullscreenChange', fullscreenChange, false);
        }
  
        // create a new parent to ensure the canvas has no siblings. this allows browsers to optimize full screen performance when its parent is the full screen root
        var canvasContainer = document.createElement("div");
        canvas.parentNode.insertBefore(canvasContainer, canvas);
        canvasContainer.appendChild(canvas);
  
        // use parent of canvas as full screen root to allow aspect ratio correction (Firefox stretches the root to screen size)
        canvasContainer.requestFullscreen = canvasContainer['requestFullscreen'] ||
                                            canvasContainer['mozRequestFullScreen'] ||
                                            canvasContainer['msRequestFullscreen'] ||
                                           (canvasContainer['webkitRequestFullscreen'] ? () => canvasContainer['webkitRequestFullscreen'](Element['ALLOW_KEYBOARD_INPUT']) : null) ||
                                           (canvasContainer['webkitRequestFullScreen'] ? () => canvasContainer['webkitRequestFullScreen'](Element['ALLOW_KEYBOARD_INPUT']) : null);
  
        canvasContainer.requestFullscreen();
      },requestFullScreen:function() {
        abort('Module.requestFullScreen has been replaced by Module.requestFullscreen (without a capital S)');
      },exitFullscreen:function() {
        // This is workaround for chrome. Trying to exit from fullscreen
        // not in fullscreen state will cause "TypeError: Document not active"
        // in chrome. See https://github.com/emscripten-core/emscripten/pull/8236
        if (!Browser.isFullscreen) {
          return false;
        }
  
        var CFS = document['exitFullscreen'] ||
                  document['cancelFullScreen'] ||
                  document['mozCancelFullScreen'] ||
                  document['msExitFullscreen'] ||
                  document['webkitCancelFullScreen'] ||
            (() => {});
        CFS.apply(document, []);
        return true;
      },nextRAF:0,fakeRequestAnimationFrame:function(func) {
        // try to keep 60fps between calls to here
        var now = Date.now();
        if (Browser.nextRAF === 0) {
          Browser.nextRAF = now + 1000/60;
        } else {
          while (now + 2 >= Browser.nextRAF) { // fudge a little, to avoid timer jitter causing us to do lots of delay:0
            Browser.nextRAF += 1000/60;
          }
        }
        var delay = Math.max(Browser.nextRAF - now, 0);
        setTimeout(func, delay);
      },requestAnimationFrame:function(func) {
        if (typeof requestAnimationFrame == 'function') {
          requestAnimationFrame(func);
          return;
        }
        var RAF = Browser.fakeRequestAnimationFrame;
        RAF(func);
      },safeSetTimeout:function(func, timeout) {
        // Legacy function, this is used by the SDL2 port so we need to keep it
        // around at least until that is updated.
        // See https://github.com/libsdl-org/SDL/pull/6304
        return safeSetTimeout(func, timeout);
      },safeRequestAnimationFrame:function(func) {
        
        return Browser.requestAnimationFrame(() => {
          
          callUserCallback(func);
        });
      },getMimetype:function(name) {
        return {
          'jpg': 'image/jpeg',
          'jpeg': 'image/jpeg',
          'png': 'image/png',
          'bmp': 'image/bmp',
          'ogg': 'audio/ogg',
          'wav': 'audio/wav',
          'mp3': 'audio/mpeg'
        }[name.substr(name.lastIndexOf('.')+1)];
      },getUserMedia:function(func) {
        if (!window.getUserMedia) {
          window.getUserMedia = navigator['getUserMedia'] ||
                                navigator['mozGetUserMedia'];
        }
        window.getUserMedia(func);
      },getMovementX:function(event) {
        return event['movementX'] ||
               event['mozMovementX'] ||
               event['webkitMovementX'] ||
               0;
      },getMovementY:function(event) {
        return event['movementY'] ||
               event['mozMovementY'] ||
               event['webkitMovementY'] ||
               0;
      },getMouseWheelDelta:function(event) {
        var delta = 0;
        switch (event.type) {
          case 'DOMMouseScroll':
            // 3 lines make up a step
            delta = event.detail / 3;
            break;
          case 'mousewheel':
            // 120 units make up a step
            delta = event.wheelDelta / 120;
            break;
          case 'wheel':
            delta = event.deltaY
            switch (event.deltaMode) {
              case 0:
                // DOM_DELTA_PIXEL: 100 pixels make up a step
                delta /= 100;
                break;
              case 1:
                // DOM_DELTA_LINE: 3 lines make up a step
                delta /= 3;
                break;
              case 2:
                // DOM_DELTA_PAGE: A page makes up 80 steps
                delta *= 80;
                break;
              default:
                throw 'unrecognized mouse wheel delta mode: ' + event.deltaMode;
            }
            break;
          default:
            throw 'unrecognized mouse wheel event: ' + event.type;
        }
        return delta;
      },mouseX:0,mouseY:0,mouseMovementX:0,mouseMovementY:0,touches:{},lastTouches:{},calculateMouseEvent:function(event) { // event should be mousemove, mousedown or mouseup
        if (Browser.pointerLock) {
          // When the pointer is locked, calculate the coordinates
          // based on the movement of the mouse.
          // Workaround for Firefox bug 764498
          if (event.type != 'mousemove' &&
              ('mozMovementX' in event)) {
            Browser.mouseMovementX = Browser.mouseMovementY = 0;
          } else {
            Browser.mouseMovementX = Browser.getMovementX(event);
            Browser.mouseMovementY = Browser.getMovementY(event);
          }
  
          // check if SDL is available
          if (typeof SDL != "undefined") {
            Browser.mouseX = SDL.mouseX + Browser.mouseMovementX;
            Browser.mouseY = SDL.mouseY + Browser.mouseMovementY;
          } else {
            // just add the mouse delta to the current absolut mouse position
            // FIXME: ideally this should be clamped against the canvas size and zero
            Browser.mouseX += Browser.mouseMovementX;
            Browser.mouseY += Browser.mouseMovementY;
          }
        } else {
          // Otherwise, calculate the movement based on the changes
          // in the coordinates.
          var rect = Module["canvas"].getBoundingClientRect();
          var cw = Module["canvas"].width;
          var ch = Module["canvas"].height;
  
          // Neither .scrollX or .pageXOffset are defined in a spec, but
          // we prefer .scrollX because it is currently in a spec draft.
          // (see: http://www.w3.org/TR/2013/WD-cssom-view-20131217/)
          var scrollX = ((typeof window.scrollX != 'undefined') ? window.scrollX : window.pageXOffset);
          var scrollY = ((typeof window.scrollY != 'undefined') ? window.scrollY : window.pageYOffset);
          // If this assert lands, it's likely because the browser doesn't support scrollX or pageXOffset
          // and we have no viable fallback.
          assert((typeof scrollX != 'undefined') && (typeof scrollY != 'undefined'), 'Unable to retrieve scroll position, mouse positions likely broken.');
  
          if (event.type === 'touchstart' || event.type === 'touchend' || event.type === 'touchmove') {
            var touch = event.touch;
            if (touch === undefined) {
              return; // the "touch" property is only defined in SDL
  
            }
            var adjustedX = touch.pageX - (scrollX + rect.left);
            var adjustedY = touch.pageY - (scrollY + rect.top);
  
            adjustedX = adjustedX * (cw / rect.width);
            adjustedY = adjustedY * (ch / rect.height);
  
            var coords = { x: adjustedX, y: adjustedY };
  
            if (event.type === 'touchstart') {
              Browser.lastTouches[touch.identifier] = coords;
              Browser.touches[touch.identifier] = coords;
            } else if (event.type === 'touchend' || event.type === 'touchmove') {
              var last = Browser.touches[touch.identifier];
              if (!last) last = coords;
              Browser.lastTouches[touch.identifier] = last;
              Browser.touches[touch.identifier] = coords;
            }
            return;
          }
  
          var x = event.pageX - (scrollX + rect.left);
          var y = event.pageY - (scrollY + rect.top);
  
          // the canvas might be CSS-scaled compared to its backbuffer;
          // SDL-using content will want mouse coordinates in terms
          // of backbuffer units.
          x = x * (cw / rect.width);
          y = y * (ch / rect.height);
  
          Browser.mouseMovementX = x - Browser.mouseX;
          Browser.mouseMovementY = y - Browser.mouseY;
          Browser.mouseX = x;
          Browser.mouseY = y;
        }
      },resizeListeners:[],updateResizeListeners:function() {
        var canvas = Module['canvas'];
        Browser.resizeListeners.forEach((listener) => listener(canvas.width, canvas.height));
      },setCanvasSize:function(width, height, noUpdates) {
        var canvas = Module['canvas'];
        Browser.updateCanvasDimensions(canvas, width, height);
        if (!noUpdates) Browser.updateResizeListeners();
      },windowedWidth:0,windowedHeight:0,setFullscreenCanvasSize:function() {
        // check if SDL is available
        if (typeof SDL != "undefined") {
          var flags = HEAPU32[((SDL.screen)>>2)];
          flags = flags | 0x00800000; // set SDL_FULLSCREEN flag
          HEAP32[((SDL.screen)>>2)] = flags;
        }
        Browser.updateCanvasDimensions(Module['canvas']);
        Browser.updateResizeListeners();
      },setWindowedCanvasSize:function() {
        // check if SDL is available
        if (typeof SDL != "undefined") {
          var flags = HEAPU32[((SDL.screen)>>2)];
          flags = flags & ~0x00800000; // clear SDL_FULLSCREEN flag
          HEAP32[((SDL.screen)>>2)] = flags;
        }
        Browser.updateCanvasDimensions(Module['canvas']);
        Browser.updateResizeListeners();
      },updateCanvasDimensions:function(canvas, wNative, hNative) {
        if (wNative && hNative) {
          canvas.widthNative = wNative;
          canvas.heightNative = hNative;
        } else {
          wNative = canvas.widthNative;
          hNative = canvas.heightNative;
        }
        var w = wNative;
        var h = hNative;
        if (Module['forcedAspectRatio'] && Module['forcedAspectRatio'] > 0) {
          if (w/h < Module['forcedAspectRatio']) {
            w = Math.round(h * Module['forcedAspectRatio']);
          } else {
            h = Math.round(w / Module['forcedAspectRatio']);
          }
        }
        if (((document['fullscreenElement'] || document['mozFullScreenElement'] ||
             document['msFullscreenElement'] || document['webkitFullscreenElement'] ||
             document['webkitCurrentFullScreenElement']) === canvas.parentNode) && (typeof screen != 'undefined')) {
           var factor = Math.min(screen.width / w, screen.height / h);
           w = Math.round(w * factor);
           h = Math.round(h * factor);
        }
        if (Browser.resizeCanvas) {
          if (canvas.width  != w) canvas.width  = w;
          if (canvas.height != h) canvas.height = h;
          if (typeof canvas.style != 'undefined') {
            canvas.style.removeProperty( "width");
            canvas.style.removeProperty("height");
          }
        } else {
          if (canvas.width  != wNative) canvas.width  = wNative;
          if (canvas.height != hNative) canvas.height = hNative;
          if (typeof canvas.style != 'undefined') {
            if (w != wNative || h != hNative) {
              canvas.style.setProperty( "width", w + "px", "important");
              canvas.style.setProperty("height", h + "px", "important");
            } else {
              canvas.style.removeProperty( "width");
              canvas.style.removeProperty("height");
            }
          }
        }
      }};
  
  var EGL = {errorCode:12288,defaultDisplayInitialized:false,currentContext:0,currentReadSurface:0,currentDrawSurface:0,contextAttributes:{alpha:false,depth:false,stencil:false,antialias:false},stringCache:{},setErrorCode:function(code) {
        EGL.errorCode = code;
      },chooseConfig:function(display, attribList, config, config_size, numConfigs) {
        if (display != 62000 /* Magic ID for Emscripten 'default display' */) {
          EGL.setErrorCode(0x3008 /* EGL_BAD_DISPLAY */);
          return 0;
        }
  
        if (attribList) {
          // read attribList if it is non-null
          for (;;) {
            var param = HEAP32[((attribList)>>2)];
            if (param == 0x3021 /*EGL_ALPHA_SIZE*/) {
              var alphaSize = HEAP32[(((attribList)+(4))>>2)];
              EGL.contextAttributes.alpha = (alphaSize > 0);
            } else if (param == 0x3025 /*EGL_DEPTH_SIZE*/) {
              var depthSize = HEAP32[(((attribList)+(4))>>2)];
              EGL.contextAttributes.depth = (depthSize > 0);
            } else if (param == 0x3026 /*EGL_STENCIL_SIZE*/) {
              var stencilSize = HEAP32[(((attribList)+(4))>>2)];
              EGL.contextAttributes.stencil = (stencilSize > 0);
            } else if (param == 0x3031 /*EGL_SAMPLES*/) {
              var samples = HEAP32[(((attribList)+(4))>>2)];
              EGL.contextAttributes.antialias = (samples > 0);
            } else if (param == 0x3032 /*EGL_SAMPLE_BUFFERS*/) {
              var samples = HEAP32[(((attribList)+(4))>>2)];
              EGL.contextAttributes.antialias = (samples == 1);
            } else if (param == 0x3100 /*EGL_CONTEXT_PRIORITY_LEVEL_IMG*/) {
              var requestedPriority = HEAP32[(((attribList)+(4))>>2)];
              EGL.contextAttributes.lowLatency = (requestedPriority != 0x3103 /*EGL_CONTEXT_PRIORITY_LOW_IMG*/);
            } else if (param == 0x3038 /*EGL_NONE*/) {
                break;
            }
            attribList += 8;
          }
        }
  
        if ((!config || !config_size) && !numConfigs) {
          EGL.setErrorCode(0x300C /* EGL_BAD_PARAMETER */);
          return 0;
        }
        if (numConfigs) {
          HEAP32[((numConfigs)>>2)] = 1; // Total number of supported configs: 1.
        }
        if (config && config_size > 0) {
          HEAP32[((config)>>2)] = 62002;
        }
  
        EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
        return 1;
      }};
  function _eglBindAPI(api) {
      if (api == 0x30A0 /* EGL_OPENGL_ES_API */) {
        EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
        return 1;
      }
      // if (api == 0x30A1 /* EGL_OPENVG_API */ || api == 0x30A2 /* EGL_OPENGL_API */) {
      EGL.setErrorCode(0x300C /* EGL_BAD_PARAMETER */);
      return 0;
    }

  function _eglChooseConfig(display, attrib_list, configs, config_size, numConfigs) {
      return EGL.chooseConfig(display, attrib_list, configs, config_size, numConfigs);
    }

  function webgl_enable_ANGLE_instanced_arrays(ctx) {
      // Extension available in WebGL 1 from Firefox 26 and Google Chrome 30 onwards. Core feature in WebGL 2.
      var ext = ctx.getExtension('ANGLE_instanced_arrays');
      if (ext) {
        ctx['vertexAttribDivisor'] = function(index, divisor) { ext['vertexAttribDivisorANGLE'](index, divisor); };
        ctx['drawArraysInstanced'] = function(mode, first, count, primcount) { ext['drawArraysInstancedANGLE'](mode, first, count, primcount); };
        ctx['drawElementsInstanced'] = function(mode, count, type, indices, primcount) { ext['drawElementsInstancedANGLE'](mode, count, type, indices, primcount); };
        return 1;
      }
    }
  
  function webgl_enable_OES_vertex_array_object(ctx) {
      // Extension available in WebGL 1 from Firefox 25 and WebKit 536.28/desktop Safari 6.0.3 onwards. Core feature in WebGL 2.
      var ext = ctx.getExtension('OES_vertex_array_object');
      if (ext) {
        ctx['createVertexArray'] = function() { return ext['createVertexArrayOES'](); };
        ctx['deleteVertexArray'] = function(vao) { ext['deleteVertexArrayOES'](vao); };
        ctx['bindVertexArray'] = function(vao) { ext['bindVertexArrayOES'](vao); };
        ctx['isVertexArray'] = function(vao) { return ext['isVertexArrayOES'](vao); };
        return 1;
      }
    }
  
  function webgl_enable_WEBGL_draw_buffers(ctx) {
      // Extension available in WebGL 1 from Firefox 28 onwards. Core feature in WebGL 2.
      var ext = ctx.getExtension('WEBGL_draw_buffers');
      if (ext) {
        ctx['drawBuffers'] = function(n, bufs) { ext['drawBuffersWEBGL'](n, bufs); };
        return 1;
      }
    }
  
  function webgl_enable_WEBGL_multi_draw(ctx) {
      // Closure is expected to be allowed to minify the '.multiDrawWebgl' property, so not accessing it quoted.
      return !!(ctx.multiDrawWebgl = ctx.getExtension('WEBGL_multi_draw'));
    }
  
  
  var GL = {counter:1,buffers:[],programs:[],framebuffers:[],renderbuffers:[],textures:[],shaders:[],vaos:[],contexts:[],offscreenCanvases:{},queries:[],stringCache:{},unpackAlignment:4,recordError:function recordError(errorCode) {
        if (!GL.lastError) {
          GL.lastError = errorCode;
        }
      },getNewId:function(table) {
        var ret = GL.counter++;
        for (var i = table.length; i < ret; i++) {
          table[i] = null;
        }
        return ret;
      },getSource:function(shader, count, string, length) {
        var source = '';
        for (var i = 0; i < count; ++i) {
          var len = length ? HEAP32[(((length)+(i*4))>>2)] : -1;
          source += UTF8ToString(HEAP32[(((string)+(i*4))>>2)], len < 0 ? undefined : len);
        }
        return source;
      },createContext:function(/** @type {HTMLCanvasElement} */ canvas, webGLContextAttributes) {
  
        // BUG: Workaround Safari WebGL issue: After successfully acquiring WebGL context on a canvas,
        // calling .getContext() will always return that context independent of which 'webgl' or 'webgl2'
        // context version was passed. See https://bugs.webkit.org/show_bug.cgi?id=222758 and
        // https://github.com/emscripten-core/emscripten/issues/13295.
        // TODO: Once the bug is fixed and shipped in Safari, adjust the Safari version field in above check.
        if (!canvas.getContextSafariWebGL2Fixed) {
          canvas.getContextSafariWebGL2Fixed = canvas.getContext;
          /** @type {function(this:HTMLCanvasElement, string, (Object|null)=): (Object|null)} */
          function fixedGetContext(ver, attrs) {
            var gl = canvas.getContextSafariWebGL2Fixed(ver, attrs);
            return ((ver == 'webgl') == (gl instanceof WebGLRenderingContext)) ? gl : null;
          }
          canvas.getContext = fixedGetContext;
        }
  
        var ctx =
          (canvas.getContext("webgl", webGLContextAttributes)
            // https://caniuse.com/#feat=webgl
            );
  
        if (!ctx) return 0;
  
        var handle = GL.registerContext(ctx, webGLContextAttributes);
  
        return handle;
      },registerContext:function(ctx, webGLContextAttributes) {
        // without pthreads a context is just an integer ID
        var handle = GL.getNewId(GL.contexts);
  
        var context = {
          handle,
          attributes: webGLContextAttributes,
          version: webGLContextAttributes.majorVersion,
          GLctx: ctx
        };
  
        // Store the created context object so that we can access the context given a canvas without having to pass the parameters again.
        if (ctx.canvas) ctx.canvas.GLctxObject = context;
        GL.contexts[handle] = context;
        if (typeof webGLContextAttributes.enableExtensionsByDefault == 'undefined' || webGLContextAttributes.enableExtensionsByDefault) {
          GL.initExtensions(context);
        }
  
        return handle;
      },makeContextCurrent:function(contextHandle) {
  
        GL.currentContext = GL.contexts[contextHandle]; // Active Emscripten GL layer context object.
        Module.ctx = GLctx = GL.currentContext && GL.currentContext.GLctx; // Active WebGL context object.
        return !(contextHandle && !GLctx);
      },getContext:function(contextHandle) {
        return GL.contexts[contextHandle];
      },deleteContext:function(contextHandle) {
        if (GL.currentContext === GL.contexts[contextHandle]) GL.currentContext = null;
        if (typeof JSEvents == 'object') JSEvents.removeAllHandlersOnTarget(GL.contexts[contextHandle].GLctx.canvas); // Release all JS event handlers on the DOM element that the GL context is associated with since the context is now deleted.
        if (GL.contexts[contextHandle] && GL.contexts[contextHandle].GLctx.canvas) GL.contexts[contextHandle].GLctx.canvas.GLctxObject = undefined; // Make sure the canvas object no longer refers to the context object so there are no GC surprises.
        GL.contexts[contextHandle] = null;
      },initExtensions:function(context) {
        // If this function is called without a specific context object, init the extensions of the currently active context.
        if (!context) context = GL.currentContext;
  
        if (context.initExtensionsDone) return;
        context.initExtensionsDone = true;
  
        var GLctx = context.GLctx;
  
        // Detect the presence of a few extensions manually, this GL interop layer itself will need to know if they exist.
  
        // Extensions that are only available in WebGL 1 (the calls will be no-ops if called on a WebGL 2 context active)
        webgl_enable_ANGLE_instanced_arrays(GLctx);
        webgl_enable_OES_vertex_array_object(GLctx);
        webgl_enable_WEBGL_draw_buffers(GLctx);
  
        {
          GLctx.disjointTimerQueryExt = GLctx.getExtension("EXT_disjoint_timer_query");
        }
  
        webgl_enable_WEBGL_multi_draw(GLctx);
  
        // .getSupportedExtensions() can return null if context is lost, so coerce to empty array.
        var exts = GLctx.getSupportedExtensions() || [];
        exts.forEach(function(ext) {
          // WEBGL_lose_context, WEBGL_debug_renderer_info and WEBGL_debug_shaders are not enabled by default.
          if (!ext.includes('lose_context') && !ext.includes('debug')) {
            // Call .getExtension() to enable that extension permanently.
            GLctx.getExtension(ext);
          }
        });
      }};
  
  function _eglCreateContext(display, config, hmm, contextAttribs) {
      if (display != 62000 /* Magic ID for Emscripten 'default display' */) {
        EGL.setErrorCode(0x3008 /* EGL_BAD_DISPLAY */);
        return 0;
      }
  
      // EGL 1.4 spec says default EGL_CONTEXT_CLIENT_VERSION is GLES1, but this is not supported by Emscripten.
      // So user must pass EGL_CONTEXT_CLIENT_VERSION == 2 to initialize EGL.
      var glesContextVersion = 1;
      for (;;) {
        var param = HEAP32[((contextAttribs)>>2)];
        if (param == 0x3098 /*EGL_CONTEXT_CLIENT_VERSION*/) {
          glesContextVersion = HEAP32[(((contextAttribs)+(4))>>2)];
        } else if (param == 0x3038 /*EGL_NONE*/) {
          break;
        } else {
          /* EGL1.4 specifies only EGL_CONTEXT_CLIENT_VERSION as supported attribute */
          EGL.setErrorCode(0x3004 /*EGL_BAD_ATTRIBUTE*/);
          return 0;
        }
        contextAttribs += 8;
      }
      if (glesContextVersion != 2) {
        EGL.setErrorCode(0x3005 /* EGL_BAD_CONFIG */);
        return 0; /* EGL_NO_CONTEXT */
      }
  
      EGL.contextAttributes.majorVersion = glesContextVersion - 1; // WebGL 1 is GLES 2, WebGL2 is GLES3
      EGL.contextAttributes.minorVersion = 0;
  
      EGL.context = GL.createContext(Module['canvas'], EGL.contextAttributes);
  
      if (EGL.context != 0) {
        EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
  
        // Run callbacks so that GL emulation works
        GL.makeContextCurrent(EGL.context);
        Module.useWebGL = true;
        Browser.moduleContextCreatedCallbacks.forEach(function(callback) { callback() });
  
        // Note: This function only creates a context, but it shall not make it active.
        GL.makeContextCurrent(null);
        return 62004; // Magic ID for Emscripten EGLContext
      } else {
        EGL.setErrorCode(0x3009 /* EGL_BAD_MATCH */); // By the EGL 1.4 spec, an implementation that does not support GLES2 (WebGL in this case), this error code is set.
        return 0; /* EGL_NO_CONTEXT */
      }
    }

  function _eglCreateWindowSurface(display, config, win, attrib_list) {
      if (display != 62000 /* Magic ID for Emscripten 'default display' */) {
        EGL.setErrorCode(0x3008 /* EGL_BAD_DISPLAY */);
        return 0;
      }
      if (config != 62002 /* Magic ID for the only EGLConfig supported by Emscripten */) {
        EGL.setErrorCode(0x3005 /* EGL_BAD_CONFIG */);
        return 0;
      }
      // TODO: Examine attrib_list! Parameters that can be present there are:
      // - EGL_RENDER_BUFFER (must be EGL_BACK_BUFFER)
      // - EGL_VG_COLORSPACE (can't be set)
      // - EGL_VG_ALPHA_FORMAT (can't be set)
      EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
      return 62006; /* Magic ID for Emscripten 'default surface' */
    }

  
  function _eglDestroyContext(display, context) {
      if (display != 62000 /* Magic ID for Emscripten 'default display' */) {
        EGL.setErrorCode(0x3008 /* EGL_BAD_DISPLAY */);
        return 0;
      }
      if (context != 62004 /* Magic ID for Emscripten EGLContext */) {
        EGL.setErrorCode(0x3006 /* EGL_BAD_CONTEXT */);
        return 0;
      }
  
      GL.deleteContext(EGL.context);
      EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
      if (EGL.currentContext == context) {
        EGL.currentContext = 0;
      }
      return 1 /* EGL_TRUE */;
    }

  function _eglDestroySurface(display, surface) {
      if (display != 62000 /* Magic ID for Emscripten 'default display' */) {
        EGL.setErrorCode(0x3008 /* EGL_BAD_DISPLAY */);
        return 0;
      }
      if (surface != 62006 /* Magic ID for the only EGLSurface supported by Emscripten */) {
        EGL.setErrorCode(0x300D /* EGL_BAD_SURFACE */);
        return 1;
      }
      if (EGL.currentReadSurface == surface) {
        EGL.currentReadSurface = 0;
      }
      if (EGL.currentDrawSurface == surface) {
        EGL.currentDrawSurface = 0;
      }
      EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
      return 1; /* Magic ID for Emscripten 'default surface' */
    }

  function _eglGetConfigAttrib(display, config, attribute, value) {
      if (display != 62000 /* Magic ID for Emscripten 'default display' */) {
        EGL.setErrorCode(0x3008 /* EGL_BAD_DISPLAY */);
        return 0;
      }
      if (config != 62002 /* Magic ID for the only EGLConfig supported by Emscripten */) {
        EGL.setErrorCode(0x3005 /* EGL_BAD_CONFIG */);
        return 0;
      }
      if (!value) {
        EGL.setErrorCode(0x300C /* EGL_BAD_PARAMETER */);
        return 0;
      }
      EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
      switch (attribute) {
      case 0x3020: // EGL_BUFFER_SIZE
        HEAP32[((value)>>2)] = EGL.contextAttributes.alpha ? 32 : 24;
        return 1;
      case 0x3021: // EGL_ALPHA_SIZE
        HEAP32[((value)>>2)] = EGL.contextAttributes.alpha ? 8 : 0;
        return 1;
      case 0x3022: // EGL_BLUE_SIZE
        HEAP32[((value)>>2)] = 8;
        return 1;
      case 0x3023: // EGL_GREEN_SIZE
        HEAP32[((value)>>2)] = 8;
        return 1;
      case 0x3024: // EGL_RED_SIZE
        HEAP32[((value)>>2)] = 8;
        return 1;
      case 0x3025: // EGL_DEPTH_SIZE
        HEAP32[((value)>>2)] = EGL.contextAttributes.depth ? 24 : 0;
        return 1;
      case 0x3026: // EGL_STENCIL_SIZE
        HEAP32[((value)>>2)] = EGL.contextAttributes.stencil ? 8 : 0;
        return 1;
      case 0x3027: // EGL_CONFIG_CAVEAT
        // We can return here one of EGL_NONE (0x3038), EGL_SLOW_CONFIG (0x3050) or EGL_NON_CONFORMANT_CONFIG (0x3051).
        HEAP32[((value)>>2)] = 0x3038;
        return 1;
      case 0x3028: // EGL_CONFIG_ID
        HEAP32[((value)>>2)] = 62002;
        return 1;
      case 0x3029: // EGL_LEVEL
        HEAP32[((value)>>2)] = 0;
        return 1;
      case 0x302A: // EGL_MAX_PBUFFER_HEIGHT
        HEAP32[((value)>>2)] = 4096;
        return 1;
      case 0x302B: // EGL_MAX_PBUFFER_PIXELS
        HEAP32[((value)>>2)] = 16777216;
        return 1;
      case 0x302C: // EGL_MAX_PBUFFER_WIDTH
        HEAP32[((value)>>2)] = 4096;
        return 1;
      case 0x302D: // EGL_NATIVE_RENDERABLE
        HEAP32[((value)>>2)] = 0;
        return 1;
      case 0x302E: // EGL_NATIVE_VISUAL_ID
        HEAP32[((value)>>2)] = 0;
        return 1;
      case 0x302F: // EGL_NATIVE_VISUAL_TYPE
        HEAP32[((value)>>2)] = 0x3038;
        return 1;
      case 0x3031: // EGL_SAMPLES
        HEAP32[((value)>>2)] = EGL.contextAttributes.antialias ? 4 : 0;
        return 1;
      case 0x3032: // EGL_SAMPLE_BUFFERS
        HEAP32[((value)>>2)] = EGL.contextAttributes.antialias ? 1 : 0;
        return 1;
      case 0x3033: // EGL_SURFACE_TYPE
        HEAP32[((value)>>2)] = 0x4;
        return 1;
      case 0x3034: // EGL_TRANSPARENT_TYPE
        // If this returns EGL_TRANSPARENT_RGB (0x3052), transparency is used through color-keying. No such thing applies to Emscripten canvas.
        HEAP32[((value)>>2)] = 0x3038;
        return 1;
      case 0x3035: // EGL_TRANSPARENT_BLUE_VALUE
      case 0x3036: // EGL_TRANSPARENT_GREEN_VALUE
      case 0x3037: // EGL_TRANSPARENT_RED_VALUE
        // "If EGL_TRANSPARENT_TYPE is EGL_NONE, then the values for EGL_TRANSPARENT_RED_VALUE, EGL_TRANSPARENT_GREEN_VALUE, and EGL_TRANSPARENT_BLUE_VALUE are undefined."
        HEAP32[((value)>>2)] = -1;
        return 1;
      case 0x3039: // EGL_BIND_TO_TEXTURE_RGB
      case 0x303A: // EGL_BIND_TO_TEXTURE_RGBA
        HEAP32[((value)>>2)] = 0;
        return 1;
      case 0x303B: // EGL_MIN_SWAP_INTERVAL
        HEAP32[((value)>>2)] = 0;
        return 1;
      case 0x303C: // EGL_MAX_SWAP_INTERVAL
        HEAP32[((value)>>2)] = 1;
        return 1;
      case 0x303D: // EGL_LUMINANCE_SIZE
      case 0x303E: // EGL_ALPHA_MASK_SIZE
        HEAP32[((value)>>2)] = 0;
        return 1;
      case 0x303F: // EGL_COLOR_BUFFER_TYPE
        // EGL has two types of buffers: EGL_RGB_BUFFER and EGL_LUMINANCE_BUFFER.
        HEAP32[((value)>>2)] = 0x308E;
        return 1;
      case 0x3040: // EGL_RENDERABLE_TYPE
        // A bit combination of EGL_OPENGL_ES_BIT,EGL_OPENVG_BIT,EGL_OPENGL_ES2_BIT and EGL_OPENGL_BIT.
        HEAP32[((value)>>2)] = 0x4;
        return 1;
      case 0x3042: // EGL_CONFORMANT
        // "EGL_CONFORMANT is a mask indicating if a client API context created with respect to the corresponding EGLConfig will pass the required conformance tests for that API."
        HEAP32[((value)>>2)] = 0;
        return 1;
      default:
        EGL.setErrorCode(0x3004 /* EGL_BAD_ATTRIBUTE */);
        return 0;
      }
    }

  function _eglGetDisplay(nativeDisplayType) {
      EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
      // Note: As a 'conformant' implementation of EGL, we would prefer to init here only if the user
      //       calls this function with EGL_DEFAULT_DISPLAY. Other display IDs would be preferred to be unsupported
      //       and EGL_NO_DISPLAY returned. Uncomment the following code lines to do this.
      // Instead, an alternative route has been preferred, namely that the Emscripten EGL implementation
      // "emulates" X11, and eglGetDisplay is expected to accept/receive a pointer to an X11 Display object.
      // Therefore, be lax and allow anything to be passed in, and return the magic handle to our default EGLDisplay object.
  
  //    if (nativeDisplayType == 0 /* EGL_DEFAULT_DISPLAY */) {
          return 62000; // Magic ID for Emscripten 'default display'
  //    }
  //    else
  //      return 0; // EGL_NO_DISPLAY
    }

  function _eglGetError() {
      return EGL.errorCode;
    }

  function _eglInitialize(display, majorVersion, minorVersion) {
      if (display != 62000 /* Magic ID for Emscripten 'default display' */) {
        EGL.setErrorCode(0x3008 /* EGL_BAD_DISPLAY */);
        return 0;
      }
      if (majorVersion) {
        HEAP32[((majorVersion)>>2)] = 1; // Advertise EGL Major version: '1'
      }
      if (minorVersion) {
        HEAP32[((minorVersion)>>2)] = 4; // Advertise EGL Minor version: '4'
      }
      EGL.defaultDisplayInitialized = true;
      EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
      return 1;
    }

  
  function _eglMakeCurrent(display, draw, read, context) {
      if (display != 62000 /* Magic ID for Emscripten 'default display' */) {
        EGL.setErrorCode(0x3008 /* EGL_BAD_DISPLAY */);
        return 0 /* EGL_FALSE */;
      }
      //\todo An EGL_NOT_INITIALIZED error is generated if EGL is not initialized for dpy.
      if (context != 0 && context != 62004 /* Magic ID for Emscripten EGLContext */) {
        EGL.setErrorCode(0x3006 /* EGL_BAD_CONTEXT */);
        return 0;
      }
      if ((read != 0 && read != 62006) || (draw != 0 && draw != 62006 /* Magic ID for Emscripten 'default surface' */)) {
        EGL.setErrorCode(0x300D /* EGL_BAD_SURFACE */);
        return 0;
      }
  
      GL.makeContextCurrent(context ? EGL.context : null);
  
      EGL.currentContext = context;
      EGL.currentDrawSurface = draw;
      EGL.currentReadSurface = read;
      EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
      return 1 /* EGL_TRUE */;
    }

  
  var stringToUTF8 = (str, outPtr, maxBytesToWrite) => {
      assert(typeof maxBytesToWrite == 'number', 'stringToUTF8(str, outPtr, maxBytesToWrite) is missing the third parameter that specifies the length of the output buffer!');
      return stringToUTF8Array(str, HEAPU8,outPtr, maxBytesToWrite);
    };
  
  var stringToNewUTF8 = (str) => {
      var size = lengthBytesUTF8(str) + 1;
      var ret = _malloc(size);
      if (ret) stringToUTF8(str, ret, size);
      return ret;
    };
  
  function _eglQueryString(display, name) {
      if (display != 62000 /* Magic ID for Emscripten 'default display' */) {
        EGL.setErrorCode(0x3008 /* EGL_BAD_DISPLAY */);
        return 0;
      }
      //\todo An EGL_NOT_INITIALIZED error is generated if EGL is not initialized for dpy.
      EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
      if (EGL.stringCache[name]) return EGL.stringCache[name];
      var ret;
      switch (name) {
        case 0x3053 /* EGL_VENDOR */: ret = stringToNewUTF8("Emscripten"); break;
        case 0x3054 /* EGL_VERSION */: ret = stringToNewUTF8("1.4 Emscripten EGL"); break;
        case 0x3055 /* EGL_EXTENSIONS */:  ret = stringToNewUTF8(""); break; // Currently not supporting any EGL extensions.
        case 0x308D /* EGL_CLIENT_APIS */: ret = stringToNewUTF8("OpenGL_ES"); break;
        default:
          EGL.setErrorCode(0x300C /* EGL_BAD_PARAMETER */);
          return 0;
      }
      EGL.stringCache[name] = ret;
      return ret;
    }

  function _eglSwapBuffers(dpy, surface) {
  
      if (!EGL.defaultDisplayInitialized) {
        EGL.setErrorCode(0x3001 /* EGL_NOT_INITIALIZED */);
      } else if (!Module.ctx) {
        EGL.setErrorCode(0x3002 /* EGL_BAD_ACCESS */);
      } else if (Module.ctx.isContextLost()) {
        EGL.setErrorCode(0x300E /* EGL_CONTEXT_LOST */);
      } else {
        // According to documentation this does an implicit flush.
        // Due to discussion at https://github.com/emscripten-core/emscripten/pull/1871
        // the flush was removed since this _may_ result in slowing code down.
        //_glFlush();
        EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
        return 1 /* EGL_TRUE */;
      }
      return 0 /* EGL_FALSE */;
    }

  
  function _eglSwapInterval(display, interval) {
      if (display != 62000 /* Magic ID for Emscripten 'default display' */) {
        EGL.setErrorCode(0x3008 /* EGL_BAD_DISPLAY */);
        return 0;
      }
      if (interval == 0) _emscripten_set_main_loop_timing(0, 0);
      else _emscripten_set_main_loop_timing(1, interval);
  
      EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
      return 1;
    }

  function _eglTerminate(display) {
      if (display != 62000 /* Magic ID for Emscripten 'default display' */) {
        EGL.setErrorCode(0x3008 /* EGL_BAD_DISPLAY */);
        return 0;
      }
      EGL.currentContext = 0;
      EGL.currentReadSurface = 0;
      EGL.currentDrawSurface = 0;
      EGL.defaultDisplayInitialized = false;
      EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
      return 1;
    }

  
  /** @suppress {duplicate } */
  function _eglWaitClient() {
      EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
      return 1;
    }
  var _eglWaitGL = _eglWaitClient;

  function _eglWaitNative(nativeEngineId) {
      EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
      return 1;
    }

  var readEmAsmArgsArray = [];
  var readEmAsmArgs = (sigPtr, buf) => {
      // Nobody should have mutated _readEmAsmArgsArray underneath us to be something else than an array.
      assert(Array.isArray(readEmAsmArgsArray));
      // The input buffer is allocated on the stack, so it must be stack-aligned.
      assert(buf % 16 == 0);
      readEmAsmArgsArray.length = 0;
      var ch;
      // Most arguments are i32s, so shift the buffer pointer so it is a plain
      // index into HEAP32.
      buf >>= 2;
      while (ch = HEAPU8[sigPtr++]) {
        var chr = String.fromCharCode(ch);
        var validChars = ['d', 'f', 'i'];
        assert(validChars.includes(chr), `Invalid character ${ch}("${chr}") in readEmAsmArgs! Use only [${validChars}], and do not specify "v" for void return argument.`);
        // Floats are always passed as doubles, and doubles and int64s take up 8
        // bytes (two 32-bit slots) in memory, align reads to these:
        buf += (ch != 105/*i*/) & buf;
        readEmAsmArgsArray.push(
          ch == 105/*i*/ ? HEAP32[buf] :
         HEAPF64[buf++ >> 1]
        );
        ++buf;
      }
      return readEmAsmArgsArray;
    };
  var runEmAsmFunction = (code, sigPtr, argbuf) => {
      var args = readEmAsmArgs(sigPtr, argbuf);
      if (!ASM_CONSTS.hasOwnProperty(code)) abort(`No EM_ASM constant found at address ${code}`);
      return ASM_CONSTS[code].apply(null, args);
    };
  var _emscripten_asm_const_int = (code, sigPtr, argbuf) => {
      return runEmAsmFunction(code, sigPtr, argbuf);
    };

  var runMainThreadEmAsm = (code, sigPtr, argbuf, sync) => {
      var args = readEmAsmArgs(sigPtr, argbuf);
      if (!ASM_CONSTS.hasOwnProperty(code)) abort(`No EM_ASM constant found at address ${code}`);
      return ASM_CONSTS[code].apply(null, args);
    };
  var _emscripten_asm_const_int_sync_on_main_thread = (code, sigPtr, argbuf) => {
      return runMainThreadEmAsm(code, sigPtr, argbuf, 1);
    };

  function _emscripten_date_now() {
      return Date.now();
    }

  var withStackSave = (f) => {
      var stack = stackSave();
      var ret = f();
      stackRestore(stack);
      return ret;
    };
  var JSEvents = {inEventHandler:0,removeAllEventListeners:function() {
        for (var i = JSEvents.eventHandlers.length-1; i >= 0; --i) {
          JSEvents._removeHandler(i);
        }
        JSEvents.eventHandlers = [];
        JSEvents.deferredCalls = [];
      },registerRemoveEventListeners:function() {
        if (!JSEvents.removeEventListenersRegistered) {
          __ATEXIT__.push(JSEvents.removeAllEventListeners);
          JSEvents.removeEventListenersRegistered = true;
        }
      },deferredCalls:[],deferCall:function(targetFunction, precedence, argsList) {
        function arraysHaveEqualContent(arrA, arrB) {
          if (arrA.length != arrB.length) return false;
  
          for (var i in arrA) {
            if (arrA[i] != arrB[i]) return false;
          }
          return true;
        }
        // Test if the given call was already queued, and if so, don't add it again.
        for (var i in JSEvents.deferredCalls) {
          var call = JSEvents.deferredCalls[i];
          if (call.targetFunction == targetFunction && arraysHaveEqualContent(call.argsList, argsList)) {
            return;
          }
        }
        JSEvents.deferredCalls.push({
          targetFunction,
          precedence,
          argsList
        });
  
        JSEvents.deferredCalls.sort(function(x,y) { return x.precedence < y.precedence; });
      },removeDeferredCalls:function(targetFunction) {
        for (var i = 0; i < JSEvents.deferredCalls.length; ++i) {
          if (JSEvents.deferredCalls[i].targetFunction == targetFunction) {
            JSEvents.deferredCalls.splice(i, 1);
            --i;
          }
        }
      },canPerformEventHandlerRequests:function() {
        return JSEvents.inEventHandler && JSEvents.currentEventHandler.allowsDeferredCalls;
      },runDeferredCalls:function() {
        if (!JSEvents.canPerformEventHandlerRequests()) {
          return;
        }
        for (var i = 0; i < JSEvents.deferredCalls.length; ++i) {
          var call = JSEvents.deferredCalls[i];
          JSEvents.deferredCalls.splice(i, 1);
          --i;
          call.targetFunction.apply(null, call.argsList);
        }
      },eventHandlers:[],removeAllHandlersOnTarget:function(target, eventTypeString) {
        for (var i = 0; i < JSEvents.eventHandlers.length; ++i) {
          if (JSEvents.eventHandlers[i].target == target && 
            (!eventTypeString || eventTypeString == JSEvents.eventHandlers[i].eventTypeString)) {
             JSEvents._removeHandler(i--);
           }
        }
      },_removeHandler:function(i) {
        var h = JSEvents.eventHandlers[i];
        h.target.removeEventListener(h.eventTypeString, h.eventListenerFunc, h.useCapture);
        JSEvents.eventHandlers.splice(i, 1);
      },registerOrRemoveHandler:function(eventHandler) {
        if (!eventHandler.target) {
          err('registerOrRemoveHandler: the target element for event handler registration does not exist, when processing the following event handler registration:');
          console.dir(eventHandler);
          return -4;
        }
        var jsEventHandler = function jsEventHandler(event) {
          // Increment nesting count for the event handler.
          ++JSEvents.inEventHandler;
          JSEvents.currentEventHandler = eventHandler;
          // Process any old deferred calls the user has placed.
          JSEvents.runDeferredCalls();
          // Process the actual event, calls back to user C code handler.
          eventHandler.handlerFunc(event);
          // Process any new deferred calls that were placed right now from this event handler.
          JSEvents.runDeferredCalls();
          // Out of event handler - restore nesting count.
          --JSEvents.inEventHandler;
        };
        
        if (eventHandler.callbackfunc) {
          eventHandler.eventListenerFunc = jsEventHandler;
          eventHandler.target.addEventListener(eventHandler.eventTypeString, jsEventHandler, eventHandler.useCapture);
          JSEvents.eventHandlers.push(eventHandler);
          JSEvents.registerRemoveEventListeners();
        } else {
          for (var i = 0; i < JSEvents.eventHandlers.length; ++i) {
            if (JSEvents.eventHandlers[i].target == eventHandler.target
             && JSEvents.eventHandlers[i].eventTypeString == eventHandler.eventTypeString) {
               JSEvents._removeHandler(i--);
             }
          }
        }
        return 0;
      },getNodeNameForTarget:function(target) {
        if (!target) return '';
        if (target == window) return '#window';
        if (target == screen) return '#screen';
        return (target && target.nodeName) ? target.nodeName : '';
      },fullscreenEnabled:function() {
        return document.fullscreenEnabled
        // Safari 13.0.3 on macOS Catalina 10.15.1 still ships with prefixed webkitFullscreenEnabled.
        // TODO: If Safari at some point ships with unprefixed version, update the version check above.
        || document.webkitFullscreenEnabled
         ;
      }};
  
  var currentFullscreenStrategy = {};
  
  
  
  
  function maybeCStringToJsString(cString) {
      // "cString > 2" checks if the input is a number, and isn't of the special
      // values we accept here, EMSCRIPTEN_EVENT_TARGET_* (which map to 0, 1, 2).
      // In other words, if cString > 2 then it's a pointer to a valid place in
      // memory, and points to a C string.
      return cString > 2 ? UTF8ToString(cString) : cString;
    }
  
  var specialHTMLTargets = [0, typeof document != 'undefined' ? document : 0, typeof window != 'undefined' ? window : 0];
  function findEventTarget(target) {
      target = maybeCStringToJsString(target);
      var domElement = specialHTMLTargets[target] || (typeof document != 'undefined' ? document.querySelector(target) : undefined);
      return domElement;
    }
  function findCanvasEventTarget(target) { return findEventTarget(target); }
  function _emscripten_get_canvas_element_size(target, width, height) {
      var canvas = findCanvasEventTarget(target);
      if (!canvas) return -4;
      HEAP32[((width)>>2)] = canvas.width;
      HEAP32[((height)>>2)] = canvas.height;
    }
  
  
  
  var stringToUTF8OnStack = (str) => {
      var size = lengthBytesUTF8(str) + 1;
      var ret = stackAlloc(size);
      stringToUTF8(str, ret, size);
      return ret;
    };
  var getCanvasElementSize = (target) => withStackSave(() => {
      var w = stackAlloc(8);
      var h = w + 4;
  
      var targetInt = stringToUTF8OnStack(target.id);
      var ret = _emscripten_get_canvas_element_size(targetInt, w, h);
      var size = [HEAP32[((w)>>2)], HEAP32[((h)>>2)]];
      return size;
    });
  
  
  function _emscripten_set_canvas_element_size(target, width, height) {
      var canvas = findCanvasEventTarget(target);
      if (!canvas) return -4;
      canvas.width = width;
      canvas.height = height;
      return 0;
    }
  
  
  function setCanvasElementSize(target, width, height) {
      if (!target.controlTransferredOffscreen) {
        target.width = width;
        target.height = height;
      } else {
        // This function is being called from high-level JavaScript code instead of asm.js/Wasm,
        // and it needs to synchronously proxy over to another thread, so marshal the string onto the heap to do the call.
        withStackSave(function() {
          var targetInt = stringToUTF8OnStack(target.id);
          _emscripten_set_canvas_element_size(targetInt, width, height);
        });
      }
    }
  
  function registerRestoreOldStyle(canvas) {
      var canvasSize = getCanvasElementSize(canvas);
      var oldWidth = canvasSize[0];
      var oldHeight = canvasSize[1];
      var oldCssWidth = canvas.style.width;
      var oldCssHeight = canvas.style.height;
      var oldBackgroundColor = canvas.style.backgroundColor; // Chrome reads color from here.
      var oldDocumentBackgroundColor = document.body.style.backgroundColor; // IE11 reads color from here.
      // Firefox always has black background color.
      var oldPaddingLeft = canvas.style.paddingLeft; // Chrome, FF, Safari
      var oldPaddingRight = canvas.style.paddingRight;
      var oldPaddingTop = canvas.style.paddingTop;
      var oldPaddingBottom = canvas.style.paddingBottom;
      var oldMarginLeft = canvas.style.marginLeft; // IE11
      var oldMarginRight = canvas.style.marginRight;
      var oldMarginTop = canvas.style.marginTop;
      var oldMarginBottom = canvas.style.marginBottom;
      var oldDocumentBodyMargin = document.body.style.margin;
      var oldDocumentOverflow = document.documentElement.style.overflow; // Chrome, Firefox
      var oldDocumentScroll = document.body.scroll; // IE
      var oldImageRendering = canvas.style.imageRendering;
  
      function restoreOldStyle() {
        var fullscreenElement = document.fullscreenElement
          || document.webkitFullscreenElement
          ;
        if (!fullscreenElement) {
          document.removeEventListener('fullscreenchange', restoreOldStyle);
  
          // Unprefixed Fullscreen API shipped in Chromium 71 (https://bugs.chromium.org/p/chromium/issues/detail?id=383813)
          // As of Safari 13.0.3 on macOS Catalina 10.15.1 still ships with prefixed webkitfullscreenchange. TODO: revisit this check once Safari ships unprefixed version.
          document.removeEventListener('webkitfullscreenchange', restoreOldStyle);
  
          setCanvasElementSize(canvas, oldWidth, oldHeight);
  
          canvas.style.width = oldCssWidth;
          canvas.style.height = oldCssHeight;
          canvas.style.backgroundColor = oldBackgroundColor; // Chrome
          // IE11 hack: assigning 'undefined' or an empty string to document.body.style.backgroundColor has no effect, so first assign back the default color
          // before setting the undefined value. Setting undefined value is also important, or otherwise we would later treat that as something that the user
          // had explicitly set so subsequent fullscreen transitions would not set background color properly.
          if (!oldDocumentBackgroundColor) document.body.style.backgroundColor = 'white';
          document.body.style.backgroundColor = oldDocumentBackgroundColor; // IE11
          canvas.style.paddingLeft = oldPaddingLeft; // Chrome, FF, Safari
          canvas.style.paddingRight = oldPaddingRight;
          canvas.style.paddingTop = oldPaddingTop;
          canvas.style.paddingBottom = oldPaddingBottom;
          canvas.style.marginLeft = oldMarginLeft; // IE11
          canvas.style.marginRight = oldMarginRight;
          canvas.style.marginTop = oldMarginTop;
          canvas.style.marginBottom = oldMarginBottom;
          document.body.style.margin = oldDocumentBodyMargin;
          document.documentElement.style.overflow = oldDocumentOverflow; // Chrome, Firefox
          document.body.scroll = oldDocumentScroll; // IE
          canvas.style.imageRendering = oldImageRendering;
          if (canvas.GLctxObject) canvas.GLctxObject.GLctx.viewport(0, 0, oldWidth, oldHeight);
  
          if (currentFullscreenStrategy.canvasResizedCallback) {
            getWasmTableEntry(currentFullscreenStrategy.canvasResizedCallback)(37, 0, currentFullscreenStrategy.canvasResizedCallbackUserData);
          }
        }
      }
      document.addEventListener('fullscreenchange', restoreOldStyle);
      // Unprefixed Fullscreen API shipped in Chromium 71 (https://bugs.chromium.org/p/chromium/issues/detail?id=383813)
      // As of Safari 13.0.3 on macOS Catalina 10.15.1 still ships with prefixed webkitfullscreenchange. TODO: revisit this check once Safari ships unprefixed version.
      document.addEventListener('webkitfullscreenchange', restoreOldStyle);
      return restoreOldStyle;
    }
  
  
  function setLetterbox(element, topBottom, leftRight) {
        // Cannot use margin to specify letterboxes in FF or Chrome, since those ignore margins in fullscreen mode.
        element.style.paddingLeft = element.style.paddingRight = leftRight + 'px';
        element.style.paddingTop = element.style.paddingBottom = topBottom + 'px';
    }
  
  
  function getBoundingClientRect(e) {
      return specialHTMLTargets.indexOf(e) < 0 ? e.getBoundingClientRect() : {'left':0,'top':0};
    }
  function JSEvents_resizeCanvasForFullscreen(target, strategy) {
      var restoreOldStyle = registerRestoreOldStyle(target);
      var cssWidth = strategy.softFullscreen ? innerWidth : screen.width;
      var cssHeight = strategy.softFullscreen ? innerHeight : screen.height;
      var rect = getBoundingClientRect(target);
      var windowedCssWidth = rect.width;
      var windowedCssHeight = rect.height;
      var canvasSize = getCanvasElementSize(target);
      var windowedRttWidth = canvasSize[0];
      var windowedRttHeight = canvasSize[1];
  
      if (strategy.scaleMode == 3) {
        setLetterbox(target, (cssHeight - windowedCssHeight) / 2, (cssWidth - windowedCssWidth) / 2);
        cssWidth = windowedCssWidth;
        cssHeight = windowedCssHeight;
      } else if (strategy.scaleMode == 2) {
        if (cssWidth*windowedRttHeight < windowedRttWidth*cssHeight) {
          var desiredCssHeight = windowedRttHeight * cssWidth / windowedRttWidth;
          setLetterbox(target, (cssHeight - desiredCssHeight) / 2, 0);
          cssHeight = desiredCssHeight;
        } else {
          var desiredCssWidth = windowedRttWidth * cssHeight / windowedRttHeight;
          setLetterbox(target, 0, (cssWidth - desiredCssWidth) / 2);
          cssWidth = desiredCssWidth;
        }
      }
  
      // If we are adding padding, must choose a background color or otherwise Chrome will give the
      // padding a default white color. Do it only if user has not customized their own background color.
      if (!target.style.backgroundColor) target.style.backgroundColor = 'black';
      // IE11 does the same, but requires the color to be set in the document body.
      if (!document.body.style.backgroundColor) document.body.style.backgroundColor = 'black'; // IE11
      // Firefox always shows black letterboxes independent of style color.
  
      target.style.width = cssWidth + 'px';
      target.style.height = cssHeight + 'px';
  
      if (strategy.filteringMode == 1) {
        target.style.imageRendering = 'optimizeSpeed';
        target.style.imageRendering = '-moz-crisp-edges';
        target.style.imageRendering = '-o-crisp-edges';
        target.style.imageRendering = '-webkit-optimize-contrast';
        target.style.imageRendering = 'optimize-contrast';
        target.style.imageRendering = 'crisp-edges';
        target.style.imageRendering = 'pixelated';
      }
  
      var dpiScale = (strategy.canvasResolutionScaleMode == 2) ? devicePixelRatio : 1;
      if (strategy.canvasResolutionScaleMode != 0) {
        var newWidth = (cssWidth * dpiScale)|0;
        var newHeight = (cssHeight * dpiScale)|0;
        setCanvasElementSize(target, newWidth, newHeight);
        if (target.GLctxObject) target.GLctxObject.GLctx.viewport(0, 0, newWidth, newHeight);
      }
      return restoreOldStyle;
    }
  
  function JSEvents_requestFullscreen(target, strategy) {
      // EMSCRIPTEN_FULLSCREEN_SCALE_DEFAULT + EMSCRIPTEN_FULLSCREEN_CANVAS_SCALE_NONE is a mode where no extra logic is performed to the DOM elements.
      if (strategy.scaleMode != 0 || strategy.canvasResolutionScaleMode != 0) {
        JSEvents_resizeCanvasForFullscreen(target, strategy);
      }
  
      if (target.requestFullscreen) {
        target.requestFullscreen();
      } else if (target.webkitRequestFullscreen) {
        target.webkitRequestFullscreen(Element.ALLOW_KEYBOARD_INPUT);
      } else {
        return JSEvents.fullscreenEnabled() ? -3 : -1;
      }
  
      currentFullscreenStrategy = strategy;
  
      if (strategy.canvasResizedCallback) {
        getWasmTableEntry(strategy.canvasResizedCallback)(37, 0, strategy.canvasResizedCallbackUserData);
      }
  
      return 0;
    }
  
  function _emscripten_exit_fullscreen() {
      if (!JSEvents.fullscreenEnabled()) return -1;
      // Make sure no queued up calls will fire after this.
      JSEvents.removeDeferredCalls(JSEvents_requestFullscreen);
  
      var d = specialHTMLTargets[1];
      if (d.exitFullscreen) {
        d.fullscreenElement && d.exitFullscreen();
      } else if (d.webkitExitFullscreen) {
        d.webkitFullscreenElement && d.webkitExitFullscreen();
      } else {
        return -1;
      }
  
      return 0;
    }

  
  function requestPointerLock(target) {
      if (target.requestPointerLock) {
        target.requestPointerLock();
      } else {
        // document.body is known to accept pointer lock, so use that to differentiate if the user passed a bad element,
        // or if the whole browser just doesn't support the feature.
        if (document.body.requestPointerLock
          ) {
          return -3;
        }
        return -1;
      }
      return 0;
    }
  function _emscripten_exit_pointerlock() {
      // Make sure no queued up calls will fire after this.
      JSEvents.removeDeferredCalls(requestPointerLock);
  
      if (document.exitPointerLock) {
        document.exitPointerLock();
      } else {
        return -1;
      }
      return 0;
    }

  function _emscripten_get_device_pixel_ratio() {
      return (typeof devicePixelRatio == 'number' && devicePixelRatio) || 1.0;
    }

  
  
  function _emscripten_get_element_css_size(target, width, height) {
      target = findEventTarget(target);
      if (!target) return -4;
  
      var rect = getBoundingClientRect(target);
      HEAPF64[((width)>>3)] = rect.width;
      HEAPF64[((height)>>3)] = rect.height;
  
      return 0;
    }

  
  function fillGamepadEventData(eventStruct, e) {
      HEAPF64[((eventStruct)>>3)] = e.timestamp;
      for (var i = 0; i < e.axes.length; ++i) {
        HEAPF64[(((eventStruct+i*8)+(16))>>3)] = e.axes[i];
      }
      for (var i = 0; i < e.buttons.length; ++i) {
        if (typeof e.buttons[i] == 'object') {
          HEAPF64[(((eventStruct+i*8)+(528))>>3)] = e.buttons[i].value;
        } else {
          HEAPF64[(((eventStruct+i*8)+(528))>>3)] = e.buttons[i];
        }
      }
      for (var i = 0; i < e.buttons.length; ++i) {
        if (typeof e.buttons[i] == 'object') {
          HEAP32[(((eventStruct+i*4)+(1040))>>2)] = e.buttons[i].pressed;
        } else {
          // Assigning a boolean to HEAP32, that's ok, but Closure would like to warn about it:
          /** @suppress {checkTypes} */
          HEAP32[(((eventStruct+i*4)+(1040))>>2)] = e.buttons[i] == 1;
        }
      }
      HEAP32[(((eventStruct)+(1296))>>2)] = e.connected;
      HEAP32[(((eventStruct)+(1300))>>2)] = e.index;
      HEAP32[(((eventStruct)+(8))>>2)] = e.axes.length;
      HEAP32[(((eventStruct)+(12))>>2)] = e.buttons.length;
      stringToUTF8(e.id, eventStruct + 1304, 64);
      stringToUTF8(e.mapping, eventStruct + 1368, 64);
    }
  function _emscripten_get_gamepad_status(index, gamepadState) {
      if (!JSEvents.lastGamepadState) throw 'emscripten_get_gamepad_status() can only be called after having first called emscripten_sample_gamepad_data() and that function has returned EMSCRIPTEN_RESULT_SUCCESS!';
  
      // INVALID_PARAM is returned on a Gamepad index that never was there.
      if (index < 0 || index >= JSEvents.lastGamepadState.length) return -5;
  
      // NO_DATA is returned on a Gamepad index that was removed.
      // For previously disconnected gamepads there should be an empty slot (null/undefined/false) at the index.
      // This is because gamepads must keep their original position in the array.
      // For example, removing the first of two gamepads produces [null/undefined/false, gamepad].
      if (!JSEvents.lastGamepadState[index]) return -7;
  
      fillGamepadEventData(gamepadState, JSEvents.lastGamepadState[index]);
      return 0;
    }


  function _emscripten_get_num_gamepads() {
      if (!JSEvents.lastGamepadState) throw 'emscripten_get_num_gamepads() can only be called after having first called emscripten_sample_gamepad_data() and that function has returned EMSCRIPTEN_RESULT_SUCCESS!';
      // N.B. Do not call emscripten_get_num_gamepads() unless having first called emscripten_sample_gamepad_data(), and that has returned EMSCRIPTEN_RESULT_SUCCESS.
      // Otherwise the following line will throw an exception.
      return JSEvents.lastGamepadState.length;
    }

  function _emscripten_get_screen_size(width, height) {
      HEAP32[((width)>>2)] = screen.width;
      HEAP32[((height)>>2)] = screen.height;
    }

  /** @suppress {duplicate } */
  function _glActiveTexture(x0) { GLctx.activeTexture(x0) }
  var _emscripten_glActiveTexture = _glActiveTexture;

  /** @suppress {duplicate } */
  function _glAttachShader(program, shader) {
      GLctx.attachShader(GL.programs[program], GL.shaders[shader]);
    }
  var _emscripten_glAttachShader = _glAttachShader;

  /** @suppress {duplicate } */
  function _glBeginQueryEXT(target, id) {
      GLctx.disjointTimerQueryExt['beginQueryEXT'](target, GL.queries[id]);
    }
  var _emscripten_glBeginQueryEXT = _glBeginQueryEXT;

  
  /** @suppress {duplicate } */
  function _glBindAttribLocation(program, index, name) {
      GLctx.bindAttribLocation(GL.programs[program], index, UTF8ToString(name));
    }
  var _emscripten_glBindAttribLocation = _glBindAttribLocation;

  /** @suppress {duplicate } */
  function _glBindBuffer(target, buffer) {
  
      GLctx.bindBuffer(target, GL.buffers[buffer]);
    }
  var _emscripten_glBindBuffer = _glBindBuffer;

  /** @suppress {duplicate } */
  function _glBindFramebuffer(target, framebuffer) {
  
      GLctx.bindFramebuffer(target, GL.framebuffers[framebuffer]);
  
    }
  var _emscripten_glBindFramebuffer = _glBindFramebuffer;

  /** @suppress {duplicate } */
  function _glBindRenderbuffer(target, renderbuffer) {
      GLctx.bindRenderbuffer(target, GL.renderbuffers[renderbuffer]);
    }
  var _emscripten_glBindRenderbuffer = _glBindRenderbuffer;

  /** @suppress {duplicate } */
  function _glBindTexture(target, texture) {
      GLctx.bindTexture(target, GL.textures[texture]);
    }
  var _emscripten_glBindTexture = _glBindTexture;

  
  /** @suppress {duplicate } */
  function _glBindVertexArray(vao) {
      GLctx.bindVertexArray(GL.vaos[vao]);
    }
  /** @suppress {duplicate } */
  var _glBindVertexArrayOES = _glBindVertexArray;
  var _emscripten_glBindVertexArrayOES = _glBindVertexArrayOES;

  /** @suppress {duplicate } */
  function _glBlendColor(x0, x1, x2, x3) { GLctx.blendColor(x0, x1, x2, x3) }
  var _emscripten_glBlendColor = _glBlendColor;

  /** @suppress {duplicate } */
  function _glBlendEquation(x0) { GLctx.blendEquation(x0) }
  var _emscripten_glBlendEquation = _glBlendEquation;

  /** @suppress {duplicate } */
  function _glBlendEquationSeparate(x0, x1) { GLctx.blendEquationSeparate(x0, x1) }
  var _emscripten_glBlendEquationSeparate = _glBlendEquationSeparate;

  /** @suppress {duplicate } */
  function _glBlendFunc(x0, x1) { GLctx.blendFunc(x0, x1) }
  var _emscripten_glBlendFunc = _glBlendFunc;

  /** @suppress {duplicate } */
  function _glBlendFuncSeparate(x0, x1, x2, x3) { GLctx.blendFuncSeparate(x0, x1, x2, x3) }
  var _emscripten_glBlendFuncSeparate = _glBlendFuncSeparate;

  /** @suppress {duplicate } */
  function _glBufferData(target, size, data, usage) {
  
        // N.b. here first form specifies a heap subarray, second form an integer size, so the ?: code here is polymorphic. It is advised to avoid
        // randomly mixing both uses in calling code, to avoid any potential JS engine JIT issues.
        GLctx.bufferData(target, data ? HEAPU8.subarray(data, data+size) : size, usage);
    }
  var _emscripten_glBufferData = _glBufferData;

  /** @suppress {duplicate } */
  function _glBufferSubData(target, offset, size, data) {
      GLctx.bufferSubData(target, offset, HEAPU8.subarray(data, data+size));
    }
  var _emscripten_glBufferSubData = _glBufferSubData;

  /** @suppress {duplicate } */
  function _glCheckFramebufferStatus(x0) { return GLctx.checkFramebufferStatus(x0) }
  var _emscripten_glCheckFramebufferStatus = _glCheckFramebufferStatus;

  /** @suppress {duplicate } */
  function _glClear(x0) { GLctx.clear(x0) }
  var _emscripten_glClear = _glClear;

  /** @suppress {duplicate } */
  function _glClearColor(x0, x1, x2, x3) { GLctx.clearColor(x0, x1, x2, x3) }
  var _emscripten_glClearColor = _glClearColor;

  /** @suppress {duplicate } */
  function _glClearDepthf(x0) { GLctx.clearDepth(x0) }
  var _emscripten_glClearDepthf = _glClearDepthf;

  /** @suppress {duplicate } */
  function _glClearStencil(x0) { GLctx.clearStencil(x0) }
  var _emscripten_glClearStencil = _glClearStencil;

  /** @suppress {duplicate } */
  function _glColorMask(red, green, blue, alpha) {
      GLctx.colorMask(!!red, !!green, !!blue, !!alpha);
    }
  var _emscripten_glColorMask = _glColorMask;

  /** @suppress {duplicate } */
  function _glCompileShader(shader) {
      GLctx.compileShader(GL.shaders[shader]);
    }
  var _emscripten_glCompileShader = _glCompileShader;

  /** @suppress {duplicate } */
  function _glCompressedTexImage2D(target, level, internalFormat, width, height, border, imageSize, data) {
      GLctx.compressedTexImage2D(target, level, internalFormat, width, height, border, data ? HEAPU8.subarray((data), (data+imageSize)) : null);
    }
  var _emscripten_glCompressedTexImage2D = _glCompressedTexImage2D;

  /** @suppress {duplicate } */
  function _glCompressedTexSubImage2D(target, level, xoffset, yoffset, width, height, format, imageSize, data) {
      GLctx.compressedTexSubImage2D(target, level, xoffset, yoffset, width, height, format, data ? HEAPU8.subarray((data), (data+imageSize)) : null);
    }
  var _emscripten_glCompressedTexSubImage2D = _glCompressedTexSubImage2D;

  /** @suppress {duplicate } */
  function _glCopyTexImage2D(x0, x1, x2, x3, x4, x5, x6, x7) { GLctx.copyTexImage2D(x0, x1, x2, x3, x4, x5, x6, x7) }
  var _emscripten_glCopyTexImage2D = _glCopyTexImage2D;

  /** @suppress {duplicate } */
  function _glCopyTexSubImage2D(x0, x1, x2, x3, x4, x5, x6, x7) { GLctx.copyTexSubImage2D(x0, x1, x2, x3, x4, x5, x6, x7) }
  var _emscripten_glCopyTexSubImage2D = _glCopyTexSubImage2D;

  /** @suppress {duplicate } */
  function _glCreateProgram() {
      var id = GL.getNewId(GL.programs);
      var program = GLctx.createProgram();
      // Store additional information needed for each shader program:
      program.name = id;
      // Lazy cache results of glGetProgramiv(GL_ACTIVE_UNIFORM_MAX_LENGTH/GL_ACTIVE_ATTRIBUTE_MAX_LENGTH/GL_ACTIVE_UNIFORM_BLOCK_MAX_NAME_LENGTH)
      program.maxUniformLength = program.maxAttributeLength = program.maxUniformBlockNameLength = 0;
      program.uniformIdCounter = 1;
      GL.programs[id] = program;
      return id;
    }
  var _emscripten_glCreateProgram = _glCreateProgram;

  /** @suppress {duplicate } */
  function _glCreateShader(shaderType) {
      var id = GL.getNewId(GL.shaders);
      GL.shaders[id] = GLctx.createShader(shaderType);
  
      return id;
    }
  var _emscripten_glCreateShader = _glCreateShader;

  /** @suppress {duplicate } */
  function _glCullFace(x0) { GLctx.cullFace(x0) }
  var _emscripten_glCullFace = _glCullFace;

  /** @suppress {duplicate } */
  function _glDeleteBuffers(n, buffers) {
      for (var i = 0; i < n; i++) {
        var id = HEAP32[(((buffers)+(i*4))>>2)];
        var buffer = GL.buffers[id];
  
        // From spec: "glDeleteBuffers silently ignores 0's and names that do not
        // correspond to existing buffer objects."
        if (!buffer) continue;
  
        GLctx.deleteBuffer(buffer);
        buffer.name = 0;
        GL.buffers[id] = null;
  
      }
    }
  var _emscripten_glDeleteBuffers = _glDeleteBuffers;

  /** @suppress {duplicate } */
  function _glDeleteFramebuffers(n, framebuffers) {
      for (var i = 0; i < n; ++i) {
        var id = HEAP32[(((framebuffers)+(i*4))>>2)];
        var framebuffer = GL.framebuffers[id];
        if (!framebuffer) continue; // GL spec: "glDeleteFramebuffers silently ignores 0s and names that do not correspond to existing framebuffer objects".
        GLctx.deleteFramebuffer(framebuffer);
        framebuffer.name = 0;
        GL.framebuffers[id] = null;
      }
    }
  var _emscripten_glDeleteFramebuffers = _glDeleteFramebuffers;

  /** @suppress {duplicate } */
  function _glDeleteProgram(id) {
      if (!id) return;
      var program = GL.programs[id];
      if (!program) { // glDeleteProgram actually signals an error when deleting a nonexisting object, unlike some other GL delete functions.
        GL.recordError(0x501 /* GL_INVALID_VALUE */);
        return;
      }
      GLctx.deleteProgram(program);
      program.name = 0;
      GL.programs[id] = null;
    }
  var _emscripten_glDeleteProgram = _glDeleteProgram;

  /** @suppress {duplicate } */
  function _glDeleteQueriesEXT(n, ids) {
      for (var i = 0; i < n; i++) {
        var id = HEAP32[(((ids)+(i*4))>>2)];
        var query = GL.queries[id];
        if (!query) continue; // GL spec: "unused names in ids are ignored, as is the name zero."
        GLctx.disjointTimerQueryExt['deleteQueryEXT'](query);
        GL.queries[id] = null;
      }
    }
  var _emscripten_glDeleteQueriesEXT = _glDeleteQueriesEXT;

  /** @suppress {duplicate } */
  function _glDeleteRenderbuffers(n, renderbuffers) {
      for (var i = 0; i < n; i++) {
        var id = HEAP32[(((renderbuffers)+(i*4))>>2)];
        var renderbuffer = GL.renderbuffers[id];
        if (!renderbuffer) continue; // GL spec: "glDeleteRenderbuffers silently ignores 0s and names that do not correspond to existing renderbuffer objects".
        GLctx.deleteRenderbuffer(renderbuffer);
        renderbuffer.name = 0;
        GL.renderbuffers[id] = null;
      }
    }
  var _emscripten_glDeleteRenderbuffers = _glDeleteRenderbuffers;

  /** @suppress {duplicate } */
  function _glDeleteShader(id) {
      if (!id) return;
      var shader = GL.shaders[id];
      if (!shader) { // glDeleteShader actually signals an error when deleting a nonexisting object, unlike some other GL delete functions.
        GL.recordError(0x501 /* GL_INVALID_VALUE */);
        return;
      }
      GLctx.deleteShader(shader);
      GL.shaders[id] = null;
    }
  var _emscripten_glDeleteShader = _glDeleteShader;

  /** @suppress {duplicate } */
  function _glDeleteTextures(n, textures) {
      for (var i = 0; i < n; i++) {
        var id = HEAP32[(((textures)+(i*4))>>2)];
        var texture = GL.textures[id];
        if (!texture) continue; // GL spec: "glDeleteTextures silently ignores 0s and names that do not correspond to existing textures".
        GLctx.deleteTexture(texture);
        texture.name = 0;
        GL.textures[id] = null;
      }
    }
  var _emscripten_glDeleteTextures = _glDeleteTextures;

  
  /** @suppress {duplicate } */
  function _glDeleteVertexArrays(n, vaos) {
      for (var i = 0; i < n; i++) {
        var id = HEAP32[(((vaos)+(i*4))>>2)];
        GLctx.deleteVertexArray(GL.vaos[id]);
        GL.vaos[id] = null;
      }
    }
  /** @suppress {duplicate } */
  var _glDeleteVertexArraysOES = _glDeleteVertexArrays;
  var _emscripten_glDeleteVertexArraysOES = _glDeleteVertexArraysOES;

  /** @suppress {duplicate } */
  function _glDepthFunc(x0) { GLctx.depthFunc(x0) }
  var _emscripten_glDepthFunc = _glDepthFunc;

  /** @suppress {duplicate } */
  function _glDepthMask(flag) {
      GLctx.depthMask(!!flag);
    }
  var _emscripten_glDepthMask = _glDepthMask;

  /** @suppress {duplicate } */
  function _glDepthRangef(x0, x1) { GLctx.depthRange(x0, x1) }
  var _emscripten_glDepthRangef = _glDepthRangef;

  /** @suppress {duplicate } */
  function _glDetachShader(program, shader) {
      GLctx.detachShader(GL.programs[program], GL.shaders[shader]);
    }
  var _emscripten_glDetachShader = _glDetachShader;

  /** @suppress {duplicate } */
  function _glDisable(x0) { GLctx.disable(x0) }
  var _emscripten_glDisable = _glDisable;

  /** @suppress {duplicate } */
  function _glDisableVertexAttribArray(index) {
      GLctx.disableVertexAttribArray(index);
    }
  var _emscripten_glDisableVertexAttribArray = _glDisableVertexAttribArray;

  /** @suppress {duplicate } */
  function _glDrawArrays(mode, first, count) {
  
      GLctx.drawArrays(mode, first, count);
  
    }
  var _emscripten_glDrawArrays = _glDrawArrays;

  
  /** @suppress {duplicate } */
  function _glDrawArraysInstanced(mode, first, count, primcount) {
      GLctx.drawArraysInstanced(mode, first, count, primcount);
    }
  /** @suppress {duplicate } */
  var _glDrawArraysInstancedANGLE = _glDrawArraysInstanced;
  var _emscripten_glDrawArraysInstancedANGLE = _glDrawArraysInstancedANGLE;

  
  var tempFixedLengthArray = [];
  
  /** @suppress {duplicate } */
  function _glDrawBuffers(n, bufs) {
  
      var bufArray = tempFixedLengthArray[n];
      for (var i = 0; i < n; i++) {
        bufArray[i] = HEAP32[(((bufs)+(i*4))>>2)];
      }
  
      GLctx.drawBuffers(bufArray);
    }
  /** @suppress {duplicate } */
  var _glDrawBuffersWEBGL = _glDrawBuffers;
  var _emscripten_glDrawBuffersWEBGL = _glDrawBuffersWEBGL;

  /** @suppress {duplicate } */
  function _glDrawElements(mode, count, type, indices) {
  
      GLctx.drawElements(mode, count, type, indices);
  
    }
  var _emscripten_glDrawElements = _glDrawElements;

  
  /** @suppress {duplicate } */
  function _glDrawElementsInstanced(mode, count, type, indices, primcount) {
      GLctx.drawElementsInstanced(mode, count, type, indices, primcount);
    }
  /** @suppress {duplicate } */
  var _glDrawElementsInstancedANGLE = _glDrawElementsInstanced;
  var _emscripten_glDrawElementsInstancedANGLE = _glDrawElementsInstancedANGLE;

  /** @suppress {duplicate } */
  function _glEnable(x0) { GLctx.enable(x0) }
  var _emscripten_glEnable = _glEnable;

  /** @suppress {duplicate } */
  function _glEnableVertexAttribArray(index) {
      GLctx.enableVertexAttribArray(index);
    }
  var _emscripten_glEnableVertexAttribArray = _glEnableVertexAttribArray;

  /** @suppress {duplicate } */
  function _glEndQueryEXT(target) {
      GLctx.disjointTimerQueryExt['endQueryEXT'](target);
    }
  var _emscripten_glEndQueryEXT = _glEndQueryEXT;

  /** @suppress {duplicate } */
  function _glFinish() { GLctx.finish() }
  var _emscripten_glFinish = _glFinish;

  /** @suppress {duplicate } */
  function _glFlush() { GLctx.flush() }
  var _emscripten_glFlush = _glFlush;

  /** @suppress {duplicate } */
  function _glFramebufferRenderbuffer(target, attachment, renderbuffertarget, renderbuffer) {
      GLctx.framebufferRenderbuffer(target, attachment, renderbuffertarget,
                                         GL.renderbuffers[renderbuffer]);
    }
  var _emscripten_glFramebufferRenderbuffer = _glFramebufferRenderbuffer;

  /** @suppress {duplicate } */
  function _glFramebufferTexture2D(target, attachment, textarget, texture, level) {
      GLctx.framebufferTexture2D(target, attachment, textarget,
                                      GL.textures[texture], level);
    }
  var _emscripten_glFramebufferTexture2D = _glFramebufferTexture2D;

  /** @suppress {duplicate } */
  function _glFrontFace(x0) { GLctx.frontFace(x0) }
  var _emscripten_glFrontFace = _glFrontFace;

  function __glGenObject(n, buffers, createFunction, objectTable
      ) {
      for (var i = 0; i < n; i++) {
        var buffer = GLctx[createFunction]();
        var id = buffer && GL.getNewId(objectTable);
        if (buffer) {
          buffer.name = id;
          objectTable[id] = buffer;
        } else {
          GL.recordError(0x502 /* GL_INVALID_OPERATION */);
        }
        HEAP32[(((buffers)+(i*4))>>2)] = id;
      }
    }
  
  /** @suppress {duplicate } */
  function _glGenBuffers(n, buffers) {
      __glGenObject(n, buffers, 'createBuffer', GL.buffers
        );
    }
  var _emscripten_glGenBuffers = _glGenBuffers;

  
  /** @suppress {duplicate } */
  function _glGenFramebuffers(n, ids) {
      __glGenObject(n, ids, 'createFramebuffer', GL.framebuffers
        );
    }
  var _emscripten_glGenFramebuffers = _glGenFramebuffers;

  /** @suppress {duplicate } */
  function _glGenQueriesEXT(n, ids) {
      for (var i = 0; i < n; i++) {
        var query = GLctx.disjointTimerQueryExt['createQueryEXT']();
        if (!query) {
          GL.recordError(0x502 /* GL_INVALID_OPERATION */);
          while (i < n) HEAP32[(((ids)+(i++*4))>>2)] = 0;
          return;
        }
        var id = GL.getNewId(GL.queries);
        query.name = id;
        GL.queries[id] = query;
        HEAP32[(((ids)+(i*4))>>2)] = id;
      }
    }
  var _emscripten_glGenQueriesEXT = _glGenQueriesEXT;

  
  /** @suppress {duplicate } */
  function _glGenRenderbuffers(n, renderbuffers) {
      __glGenObject(n, renderbuffers, 'createRenderbuffer', GL.renderbuffers
        );
    }
  var _emscripten_glGenRenderbuffers = _glGenRenderbuffers;

  
  /** @suppress {duplicate } */
  function _glGenTextures(n, textures) {
      __glGenObject(n, textures, 'createTexture', GL.textures
        );
    }
  var _emscripten_glGenTextures = _glGenTextures;

  
  
  /** @suppress {duplicate } */
  function _glGenVertexArrays(n, arrays) {
      __glGenObject(n, arrays, 'createVertexArray', GL.vaos
        );
    }
  /** @suppress {duplicate } */
  var _glGenVertexArraysOES = _glGenVertexArrays;
  var _emscripten_glGenVertexArraysOES = _glGenVertexArraysOES;

  /** @suppress {duplicate } */
  function _glGenerateMipmap(x0) { GLctx.generateMipmap(x0) }
  var _emscripten_glGenerateMipmap = _glGenerateMipmap;

  
  function __glGetActiveAttribOrUniform(funcName, program, index, bufSize, length, size, type, name) {
      program = GL.programs[program];
      var info = GLctx[funcName](program, index);
      if (info) { // If an error occurs, nothing will be written to length, size and type and name.
        var numBytesWrittenExclNull = name && stringToUTF8(info.name, name, bufSize);
        if (length) HEAP32[((length)>>2)] = numBytesWrittenExclNull;
        if (size) HEAP32[((size)>>2)] = info.size;
        if (type) HEAP32[((type)>>2)] = info.type;
      }
    }
  
  /** @suppress {duplicate } */
  function _glGetActiveAttrib(program, index, bufSize, length, size, type, name) {
      __glGetActiveAttribOrUniform('getActiveAttrib', program, index, bufSize, length, size, type, name);
    }
  var _emscripten_glGetActiveAttrib = _glGetActiveAttrib;

  
  /** @suppress {duplicate } */
  function _glGetActiveUniform(program, index, bufSize, length, size, type, name) {
      __glGetActiveAttribOrUniform('getActiveUniform', program, index, bufSize, length, size, type, name);
    }
  var _emscripten_glGetActiveUniform = _glGetActiveUniform;

  /** @suppress {duplicate } */
  function _glGetAttachedShaders(program, maxCount, count, shaders) {
      var result = GLctx.getAttachedShaders(GL.programs[program]);
      var len = result.length;
      if (len > maxCount) {
        len = maxCount;
      }
      HEAP32[((count)>>2)] = len;
      for (var i = 0; i < len; ++i) {
        var id = GL.shaders.indexOf(result[i]);
        HEAP32[(((shaders)+(i*4))>>2)] = id;
      }
    }
  var _emscripten_glGetAttachedShaders = _glGetAttachedShaders;

  
  /** @suppress {duplicate } */
  function _glGetAttribLocation(program, name) {
      return GLctx.getAttribLocation(GL.programs[program], UTF8ToString(name));
    }
  var _emscripten_glGetAttribLocation = _glGetAttribLocation;

  function readI53FromI64(ptr) {
      return HEAPU32[ptr>>2] + HEAP32[ptr+4>>2] * 4294967296;
    }
  
  function readI53FromU64(ptr) {
      return HEAPU32[ptr>>2] + HEAPU32[ptr+4>>2] * 4294967296;
    }
  function writeI53ToI64(ptr, num) {
      HEAPU32[ptr>>2] = num;
      HEAPU32[ptr+4>>2] = (num - HEAPU32[ptr>>2])/4294967296;
      var deserialized = (num >= 0) ? readI53FromU64(ptr) : readI53FromI64(ptr);
      if (deserialized != num) warnOnce('writeI53ToI64() out of range: serialized JS Number ' + num + ' to Wasm heap as bytes lo=' + ptrToString(HEAPU32[ptr>>2]) + ', hi=' + ptrToString(HEAPU32[ptr+4>>2]) + ', which deserializes back to ' + deserialized + ' instead!');
    }
  
  function emscriptenWebGLGet(name_, p, type) {
      // Guard against user passing a null pointer.
      // Note that GLES2 spec does not say anything about how passing a null pointer should be treated.
      // Testing on desktop core GL 3, the application crashes on glGetIntegerv to a null pointer, but
      // better to report an error instead of doing anything random.
      if (!p) {
        GL.recordError(0x501 /* GL_INVALID_VALUE */);
        return;
      }
      var ret = undefined;
      switch (name_) { // Handle a few trivial GLES values
        case 0x8DFA: // GL_SHADER_COMPILER
          ret = 1;
          break;
        case 0x8DF8: // GL_SHADER_BINARY_FORMATS
          if (type != 0 && type != 1) {
            GL.recordError(0x500); // GL_INVALID_ENUM
          }
          return; // Do not write anything to the out pointer, since no binary formats are supported.
        case 0x8DF9: // GL_NUM_SHADER_BINARY_FORMATS
          ret = 0;
          break;
        case 0x86A2: // GL_NUM_COMPRESSED_TEXTURE_FORMATS
          // WebGL doesn't have GL_NUM_COMPRESSED_TEXTURE_FORMATS (it's obsolete since GL_COMPRESSED_TEXTURE_FORMATS returns a JS array that can be queried for length),
          // so implement it ourselves to allow C++ GLES2 code get the length.
          var formats = GLctx.getParameter(0x86A3 /*GL_COMPRESSED_TEXTURE_FORMATS*/);
          ret = formats ? formats.length : 0;
          break;
  
      }
  
      if (ret === undefined) {
        var result = GLctx.getParameter(name_);
        switch (typeof result) {
          case "number":
            ret = result;
            break;
          case "boolean":
            ret = result ? 1 : 0;
            break;
          case "string":
            GL.recordError(0x500); // GL_INVALID_ENUM
            return;
          case "object":
            if (result === null) {
              // null is a valid result for some (e.g., which buffer is bound - perhaps nothing is bound), but otherwise
              // can mean an invalid name_, which we need to report as an error
              switch (name_) {
                case 0x8894: // ARRAY_BUFFER_BINDING
                case 0x8B8D: // CURRENT_PROGRAM
                case 0x8895: // ELEMENT_ARRAY_BUFFER_BINDING
                case 0x8CA6: // FRAMEBUFFER_BINDING or DRAW_FRAMEBUFFER_BINDING
                case 0x8CA7: // RENDERBUFFER_BINDING
                case 0x8069: // TEXTURE_BINDING_2D
                case 0x85B5: // WebGL 2 GL_VERTEX_ARRAY_BINDING, or WebGL 1 extension OES_vertex_array_object GL_VERTEX_ARRAY_BINDING_OES
                case 0x8514: { // TEXTURE_BINDING_CUBE_MAP
                  ret = 0;
                  break;
                }
                default: {
                  GL.recordError(0x500); // GL_INVALID_ENUM
                  return;
                }
              }
            } else if (result instanceof Float32Array ||
                       result instanceof Uint32Array ||
                       result instanceof Int32Array ||
                       result instanceof Array) {
              for (var i = 0; i < result.length; ++i) {
                switch (type) {
                  case 0: HEAP32[(((p)+(i*4))>>2)] = result[i]; break;
                  case 2: HEAPF32[(((p)+(i*4))>>2)] = result[i]; break;
                  case 4: HEAP8[(((p)+(i))>>0)] = result[i] ? 1 : 0; break;
                }
              }
              return;
            } else {
              try {
                ret = result.name | 0;
              } catch(e) {
                GL.recordError(0x500); // GL_INVALID_ENUM
                err('GL_INVALID_ENUM in glGet' + type + 'v: Unknown object returned from WebGL getParameter(' + name_ + ')! (error: ' + e + ')');
                return;
              }
            }
            break;
          default:
            GL.recordError(0x500); // GL_INVALID_ENUM
            err('GL_INVALID_ENUM in glGet' + type + 'v: Native code calling glGet' + type + 'v(' + name_ + ') and it returns ' + result + ' of type ' + typeof(result) + '!');
            return;
        }
      }
  
      switch (type) {
        case 1: writeI53ToI64(p, ret); break;
        case 0: HEAP32[((p)>>2)] = ret; break;
        case 2:   HEAPF32[((p)>>2)] = ret; break;
        case 4: HEAP8[((p)>>0)] = ret ? 1 : 0; break;
      }
    }
  
  /** @suppress {duplicate } */
  function _glGetBooleanv(name_, p) {
      emscriptenWebGLGet(name_, p, 4);
    }
  var _emscripten_glGetBooleanv = _glGetBooleanv;

  /** @suppress {duplicate } */
  function _glGetBufferParameteriv(target, value, data) {
      if (!data) {
        // GLES2 specification does not specify how to behave if data is a null pointer. Since calling this function does not make sense
        // if data == null, issue a GL error to notify user about it.
        GL.recordError(0x501 /* GL_INVALID_VALUE */);
        return;
      }
      HEAP32[((data)>>2)] = GLctx.getBufferParameter(target, value);
    }
  var _emscripten_glGetBufferParameteriv = _glGetBufferParameteriv;

  /** @suppress {duplicate } */
  function _glGetError() {
      var error = GLctx.getError() || GL.lastError;
      GL.lastError = 0/*GL_NO_ERROR*/;
      return error;
    }
  var _emscripten_glGetError = _glGetError;

  
  /** @suppress {duplicate } */
  function _glGetFloatv(name_, p) {
      emscriptenWebGLGet(name_, p, 2);
    }
  var _emscripten_glGetFloatv = _glGetFloatv;

  /** @suppress {duplicate } */
  function _glGetFramebufferAttachmentParameteriv(target, attachment, pname, params) {
      var result = GLctx.getFramebufferAttachmentParameter(target, attachment, pname);
      if (result instanceof WebGLRenderbuffer ||
          result instanceof WebGLTexture) {
        result = result.name | 0;
      }
      HEAP32[((params)>>2)] = result;
    }
  var _emscripten_glGetFramebufferAttachmentParameteriv = _glGetFramebufferAttachmentParameteriv;

  
  /** @suppress {duplicate } */
  function _glGetIntegerv(name_, p) {
      emscriptenWebGLGet(name_, p, 0);
    }
  var _emscripten_glGetIntegerv = _glGetIntegerv;

  /** @suppress {duplicate } */
  function _glGetProgramInfoLog(program, maxLength, length, infoLog) {
      var log = GLctx.getProgramInfoLog(GL.programs[program]);
      if (log === null) log = '(unknown error)';
      var numBytesWrittenExclNull = (maxLength > 0 && infoLog) ? stringToUTF8(log, infoLog, maxLength) : 0;
      if (length) HEAP32[((length)>>2)] = numBytesWrittenExclNull;
    }
  var _emscripten_glGetProgramInfoLog = _glGetProgramInfoLog;

  /** @suppress {duplicate } */
  function _glGetProgramiv(program, pname, p) {
      if (!p) {
        // GLES2 specification does not specify how to behave if p is a null pointer. Since calling this function does not make sense
        // if p == null, issue a GL error to notify user about it.
        GL.recordError(0x501 /* GL_INVALID_VALUE */);
        return;
      }
  
      if (program >= GL.counter) {
        GL.recordError(0x501 /* GL_INVALID_VALUE */);
        return;
      }
  
      program = GL.programs[program];
  
      if (pname == 0x8B84) { // GL_INFO_LOG_LENGTH
        var log = GLctx.getProgramInfoLog(program);
        if (log === null) log = '(unknown error)';
        HEAP32[((p)>>2)] = log.length + 1;
      } else if (pname == 0x8B87 /* GL_ACTIVE_UNIFORM_MAX_LENGTH */) {
        if (!program.maxUniformLength) {
          for (var i = 0; i < GLctx.getProgramParameter(program, 0x8B86/*GL_ACTIVE_UNIFORMS*/); ++i) {
            program.maxUniformLength = Math.max(program.maxUniformLength, GLctx.getActiveUniform(program, i).name.length+1);
          }
        }
        HEAP32[((p)>>2)] = program.maxUniformLength;
      } else if (pname == 0x8B8A /* GL_ACTIVE_ATTRIBUTE_MAX_LENGTH */) {
        if (!program.maxAttributeLength) {
          for (var i = 0; i < GLctx.getProgramParameter(program, 0x8B89/*GL_ACTIVE_ATTRIBUTES*/); ++i) {
            program.maxAttributeLength = Math.max(program.maxAttributeLength, GLctx.getActiveAttrib(program, i).name.length+1);
          }
        }
        HEAP32[((p)>>2)] = program.maxAttributeLength;
      } else if (pname == 0x8A35 /* GL_ACTIVE_UNIFORM_BLOCK_MAX_NAME_LENGTH */) {
        if (!program.maxUniformBlockNameLength) {
          for (var i = 0; i < GLctx.getProgramParameter(program, 0x8A36/*GL_ACTIVE_UNIFORM_BLOCKS*/); ++i) {
            program.maxUniformBlockNameLength = Math.max(program.maxUniformBlockNameLength, GLctx.getActiveUniformBlockName(program, i).length+1);
          }
        }
        HEAP32[((p)>>2)] = program.maxUniformBlockNameLength;
      } else {
        HEAP32[((p)>>2)] = GLctx.getProgramParameter(program, pname);
      }
    }
  var _emscripten_glGetProgramiv = _glGetProgramiv;

  
  /** @suppress {duplicate } */
  function _glGetQueryObjecti64vEXT(id, pname, params) {
      if (!params) {
        // GLES2 specification does not specify how to behave if params is a null pointer. Since calling this function does not make sense
        // if p == null, issue a GL error to notify user about it.
        GL.recordError(0x501 /* GL_INVALID_VALUE */);
        return;
      }
      var query = GL.queries[id];
      var param;
      {
        param = GLctx.disjointTimerQueryExt['getQueryObjectEXT'](query, pname);
      }
      var ret;
      if (typeof param == 'boolean') {
        ret = param ? 1 : 0;
      } else {
        ret = param;
      }
      writeI53ToI64(params, ret);
    }
  var _emscripten_glGetQueryObjecti64vEXT = _glGetQueryObjecti64vEXT;

  /** @suppress {duplicate } */
  function _glGetQueryObjectivEXT(id, pname, params) {
      if (!params) {
        // GLES2 specification does not specify how to behave if params is a null pointer. Since calling this function does not make sense
        // if p == null, issue a GL error to notify user about it.
        GL.recordError(0x501 /* GL_INVALID_VALUE */);
        return;
      }
      var query = GL.queries[id];
      var param = GLctx.disjointTimerQueryExt['getQueryObjectEXT'](query, pname);
      var ret;
      if (typeof param == 'boolean') {
        ret = param ? 1 : 0;
      } else {
        ret = param;
      }
      HEAP32[((params)>>2)] = ret;
    }
  var _emscripten_glGetQueryObjectivEXT = _glGetQueryObjectivEXT;

  
  /** @suppress {duplicate } */
  var _glGetQueryObjectui64vEXT = _glGetQueryObjecti64vEXT;
  var _emscripten_glGetQueryObjectui64vEXT = _glGetQueryObjectui64vEXT;

  
  /** @suppress {duplicate } */
  var _glGetQueryObjectuivEXT = _glGetQueryObjectivEXT;
  var _emscripten_glGetQueryObjectuivEXT = _glGetQueryObjectuivEXT;

  /** @suppress {duplicate } */
  function _glGetQueryivEXT(target, pname, params) {
      if (!params) {
        // GLES2 specification does not specify how to behave if params is a null pointer. Since calling this function does not make sense
        // if p == null, issue a GL error to notify user about it.
        GL.recordError(0x501 /* GL_INVALID_VALUE */);
        return;
      }
      HEAP32[((params)>>2)] = GLctx.disjointTimerQueryExt['getQueryEXT'](target, pname);
    }
  var _emscripten_glGetQueryivEXT = _glGetQueryivEXT;

  /** @suppress {duplicate } */
  function _glGetRenderbufferParameteriv(target, pname, params) {
      if (!params) {
        // GLES2 specification does not specify how to behave if params is a null pointer. Since calling this function does not make sense
        // if params == null, issue a GL error to notify user about it.
        GL.recordError(0x501 /* GL_INVALID_VALUE */);
        return;
      }
      HEAP32[((params)>>2)] = GLctx.getRenderbufferParameter(target, pname);
    }
  var _emscripten_glGetRenderbufferParameteriv = _glGetRenderbufferParameteriv;

  
  /** @suppress {duplicate } */
  function _glGetShaderInfoLog(shader, maxLength, length, infoLog) {
      var log = GLctx.getShaderInfoLog(GL.shaders[shader]);
      if (log === null) log = '(unknown error)';
      var numBytesWrittenExclNull = (maxLength > 0 && infoLog) ? stringToUTF8(log, infoLog, maxLength) : 0;
      if (length) HEAP32[((length)>>2)] = numBytesWrittenExclNull;
    }
  var _emscripten_glGetShaderInfoLog = _glGetShaderInfoLog;

  /** @suppress {duplicate } */
  function _glGetShaderPrecisionFormat(shaderType, precisionType, range, precision) {
      var result = GLctx.getShaderPrecisionFormat(shaderType, precisionType);
      HEAP32[((range)>>2)] = result.rangeMin;
      HEAP32[(((range)+(4))>>2)] = result.rangeMax;
      HEAP32[((precision)>>2)] = result.precision;
    }
  var _emscripten_glGetShaderPrecisionFormat = _glGetShaderPrecisionFormat;

  /** @suppress {duplicate } */
  function _glGetShaderSource(shader, bufSize, length, source) {
      var result = GLctx.getShaderSource(GL.shaders[shader]);
      if (!result) return; // If an error occurs, nothing will be written to length or source.
      var numBytesWrittenExclNull = (bufSize > 0 && source) ? stringToUTF8(result, source, bufSize) : 0;
      if (length) HEAP32[((length)>>2)] = numBytesWrittenExclNull;
    }
  var _emscripten_glGetShaderSource = _glGetShaderSource;

  /** @suppress {duplicate } */
  function _glGetShaderiv(shader, pname, p) {
      if (!p) {
        // GLES2 specification does not specify how to behave if p is a null pointer. Since calling this function does not make sense
        // if p == null, issue a GL error to notify user about it.
        GL.recordError(0x501 /* GL_INVALID_VALUE */);
        return;
      }
      if (pname == 0x8B84) { // GL_INFO_LOG_LENGTH
        var log = GLctx.getShaderInfoLog(GL.shaders[shader]);
        if (log === null) log = '(unknown error)';
        // The GLES2 specification says that if the shader has an empty info log,
        // a value of 0 is returned. Otherwise the log has a null char appended.
        // (An empty string is falsey, so we can just check that instead of
        // looking at log.length.)
        var logLength = log ? log.length + 1 : 0;
        HEAP32[((p)>>2)] = logLength;
      } else if (pname == 0x8B88) { // GL_SHADER_SOURCE_LENGTH
        var source = GLctx.getShaderSource(GL.shaders[shader]);
        // source may be a null, or the empty string, both of which are falsey
        // values that we report a 0 length for.
        var sourceLength = source ? source.length + 1 : 0;
        HEAP32[((p)>>2)] = sourceLength;
      } else {
        HEAP32[((p)>>2)] = GLctx.getShaderParameter(GL.shaders[shader], pname);
      }
    }
  var _emscripten_glGetShaderiv = _glGetShaderiv;

  
  /** @suppress {duplicate } */
  function _glGetString(name_) {
      var ret = GL.stringCache[name_];
      if (!ret) {
        switch (name_) {
          case 0x1F03 /* GL_EXTENSIONS */:
            var exts = GLctx.getSupportedExtensions() || []; // .getSupportedExtensions() can return null if context is lost, so coerce to empty array.
            exts = exts.concat(exts.map(function(e) { return "GL_" + e; }));
            ret = stringToNewUTF8(exts.join(' '));
            break;
          case 0x1F00 /* GL_VENDOR */:
          case 0x1F01 /* GL_RENDERER */:
          case 0x9245 /* UNMASKED_VENDOR_WEBGL */:
          case 0x9246 /* UNMASKED_RENDERER_WEBGL */:
            var s = GLctx.getParameter(name_);
            if (!s) {
              GL.recordError(0x500/*GL_INVALID_ENUM*/);
            }
            ret = s && stringToNewUTF8(s);
            break;
  
          case 0x1F02 /* GL_VERSION */:
            var glVersion = GLctx.getParameter(0x1F02 /*GL_VERSION*/);
            // return GLES version string corresponding to the version of the WebGL context
            {
              glVersion = 'OpenGL ES 2.0 (' + glVersion + ')';
            }
            ret = stringToNewUTF8(glVersion);
            break;
          case 0x8B8C /* GL_SHADING_LANGUAGE_VERSION */:
            var glslVersion = GLctx.getParameter(0x8B8C /*GL_SHADING_LANGUAGE_VERSION*/);
            // extract the version number 'N.M' from the string 'WebGL GLSL ES N.M ...'
            var ver_re = /^WebGL GLSL ES ([0-9]\.[0-9][0-9]?)(?:$| .*)/;
            var ver_num = glslVersion.match(ver_re);
            if (ver_num !== null) {
              if (ver_num[1].length == 3) ver_num[1] = ver_num[1] + '0'; // ensure minor version has 2 digits
              glslVersion = 'OpenGL ES GLSL ES ' + ver_num[1] + ' (' + glslVersion + ')';
            }
            ret = stringToNewUTF8(glslVersion);
            break;
          default:
            GL.recordError(0x500/*GL_INVALID_ENUM*/);
            // fall through
        }
        GL.stringCache[name_] = ret;
      }
      return ret;
    }
  var _emscripten_glGetString = _glGetString;

  /** @suppress {duplicate } */
  function _glGetTexParameterfv(target, pname, params) {
      if (!params) {
        // GLES2 specification does not specify how to behave if params is a null pointer. Since calling this function does not make sense
        // if p == null, issue a GL error to notify user about it.
        GL.recordError(0x501 /* GL_INVALID_VALUE */);
        return;
      }
      HEAPF32[((params)>>2)] = GLctx.getTexParameter(target, pname);
    }
  var _emscripten_glGetTexParameterfv = _glGetTexParameterfv;

  /** @suppress {duplicate } */
  function _glGetTexParameteriv(target, pname, params) {
      if (!params) {
        // GLES2 specification does not specify how to behave if params is a null pointer. Since calling this function does not make sense
        // if p == null, issue a GL error to notify user about it.
        GL.recordError(0x501 /* GL_INVALID_VALUE */);
        return;
      }
      HEAP32[((params)>>2)] = GLctx.getTexParameter(target, pname);
    }
  var _emscripten_glGetTexParameteriv = _glGetTexParameteriv;

  /** @suppress {checkTypes} */
  var jstoi_q = (str) => parseInt(str);
  
  /** @noinline */
  function webglGetLeftBracePos(name) {
      return name.slice(-1) == ']' && name.lastIndexOf('[');
    }
  
  function webglPrepareUniformLocationsBeforeFirstUse(program) {
      var uniformLocsById = program.uniformLocsById, // Maps GLuint -> WebGLUniformLocation
        uniformSizeAndIdsByName = program.uniformSizeAndIdsByName, // Maps name -> [uniform array length, GLuint]
        i, j;
  
      // On the first time invocation of glGetUniformLocation on this shader program:
      // initialize cache data structures and discover which uniforms are arrays.
      if (!uniformLocsById) {
        // maps GLint integer locations to WebGLUniformLocations
        program.uniformLocsById = uniformLocsById = {};
        // maps integer locations back to uniform name strings, so that we can lazily fetch uniform array locations
        program.uniformArrayNamesById = {};
  
        for (i = 0; i < GLctx.getProgramParameter(program, 0x8B86/*GL_ACTIVE_UNIFORMS*/); ++i) {
          var u = GLctx.getActiveUniform(program, i);
          var nm = u.name;
          var sz = u.size;
          var lb = webglGetLeftBracePos(nm);
          var arrayName = lb > 0 ? nm.slice(0, lb) : nm;
  
          // Assign a new location.
          var id = program.uniformIdCounter;
          program.uniformIdCounter += sz;
          // Eagerly get the location of the uniformArray[0] base element.
          // The remaining indices >0 will be left for lazy evaluation to
          // improve performance. Those may never be needed to fetch, if the
          // application fills arrays always in full starting from the first
          // element of the array.
          uniformSizeAndIdsByName[arrayName] = [sz, id];
  
          // Store placeholder integers in place that highlight that these
          // >0 index locations are array indices pending population.
          for(j = 0; j < sz; ++j) {
            uniformLocsById[id] = j;
            program.uniformArrayNamesById[id++] = arrayName;
          }
        }
      }
    }
  
  
  
  /** @suppress {duplicate } */
  function _glGetUniformLocation(program, name) {
  
      name = UTF8ToString(name);
  
      if (program = GL.programs[program]) {
        webglPrepareUniformLocationsBeforeFirstUse(program);
        var uniformLocsById = program.uniformLocsById; // Maps GLuint -> WebGLUniformLocation
        var arrayIndex = 0;
        var uniformBaseName = name;
  
        // Invariant: when populating integer IDs for uniform locations, we must maintain the precondition that
        // arrays reside in contiguous addresses, i.e. for a 'vec4 colors[10];', colors[4] must be at location colors[0]+4.
        // However, user might call glGetUniformLocation(program, "colors") for an array, so we cannot discover based on the user
        // input arguments whether the uniform we are dealing with is an array. The only way to discover which uniforms are arrays
        // is to enumerate over all the active uniforms in the program.
        var leftBrace = webglGetLeftBracePos(name);
  
        // If user passed an array accessor "[index]", parse the array index off the accessor.
        if (leftBrace > 0) {
          arrayIndex = jstoi_q(name.slice(leftBrace + 1)) >>> 0; // "index]", coerce parseInt(']') with >>>0 to treat "foo[]" as "foo[0]" and foo[-1] as unsigned out-of-bounds.
          uniformBaseName = name.slice(0, leftBrace);
        }
  
        // Have we cached the location of this uniform before?
        var sizeAndId = program.uniformSizeAndIdsByName[uniformBaseName]; // A pair [array length, GLint of the uniform location]
  
        // If an uniform with this name exists, and if its index is within the array limits (if it's even an array),
        // query the WebGLlocation, or return an existing cached location.
        if (sizeAndId && arrayIndex < sizeAndId[0]) {
          arrayIndex += sizeAndId[1]; // Add the base location of the uniform to the array index offset.
          if ((uniformLocsById[arrayIndex] = uniformLocsById[arrayIndex] || GLctx.getUniformLocation(program, name))) {
            return arrayIndex;
          }
        }
      }
      else {
        // N.b. we are currently unable to distinguish between GL program IDs that never existed vs GL program IDs that have been deleted,
        // so report GL_INVALID_VALUE in both cases.
        GL.recordError(0x501 /* GL_INVALID_VALUE */);
      }
      return -1;
    }
  var _emscripten_glGetUniformLocation = _glGetUniformLocation;

  function webglGetUniformLocation(location) {
      var p = GLctx.currentProgram;
  
      if (p) {
        var webglLoc = p.uniformLocsById[location];
        // p.uniformLocsById[location] stores either an integer, or a WebGLUniformLocation.
  
        // If an integer, we have not yet bound the location, so do it now. The integer value specifies the array index
        // we should bind to.
        if (typeof webglLoc == 'number') {
          p.uniformLocsById[location] = webglLoc = GLctx.getUniformLocation(p, p.uniformArrayNamesById[location] + (webglLoc > 0 ? '[' + webglLoc + ']' : ''));
        }
        // Else an already cached WebGLUniformLocation, return it.
        return webglLoc;
      } else {
        GL.recordError(0x502/*GL_INVALID_OPERATION*/);
      }
    }
  
  
  /** @suppress{checkTypes} */
  function emscriptenWebGLGetUniform(program, location, params, type) {
      if (!params) {
        // GLES2 specification does not specify how to behave if params is a null pointer. Since calling this function does not make sense
        // if params == null, issue a GL error to notify user about it.
        GL.recordError(0x501 /* GL_INVALID_VALUE */);
        return;
      }
      program = GL.programs[program];
      webglPrepareUniformLocationsBeforeFirstUse(program);
      var data = GLctx.getUniform(program, webglGetUniformLocation(location));
      if (typeof data == 'number' || typeof data == 'boolean') {
        switch (type) {
          case 0: HEAP32[((params)>>2)] = data; break;
          case 2: HEAPF32[((params)>>2)] = data; break;
        }
      } else {
        for (var i = 0; i < data.length; i++) {
          switch (type) {
            case 0: HEAP32[(((params)+(i*4))>>2)] = data[i]; break;
            case 2: HEAPF32[(((params)+(i*4))>>2)] = data[i]; break;
          }
        }
      }
    }
  
  /** @suppress {duplicate } */
  function _glGetUniformfv(program, location, params) {
      emscriptenWebGLGetUniform(program, location, params, 2);
    }
  var _emscripten_glGetUniformfv = _glGetUniformfv;

  
  /** @suppress {duplicate } */
  function _glGetUniformiv(program, location, params) {
      emscriptenWebGLGetUniform(program, location, params, 0);
    }
  var _emscripten_glGetUniformiv = _glGetUniformiv;

  /** @suppress {duplicate } */
  function _glGetVertexAttribPointerv(index, pname, pointer) {
      if (!pointer) {
        // GLES2 specification does not specify how to behave if pointer is a null pointer. Since calling this function does not make sense
        // if pointer == null, issue a GL error to notify user about it.
        GL.recordError(0x501 /* GL_INVALID_VALUE */);
        return;
      }
      HEAP32[((pointer)>>2)] = GLctx.getVertexAttribOffset(index, pname);
    }
  var _emscripten_glGetVertexAttribPointerv = _glGetVertexAttribPointerv;

  /** @suppress{checkTypes} */
  function emscriptenWebGLGetVertexAttrib(index, pname, params, type) {
      if (!params) {
        // GLES2 specification does not specify how to behave if params is a null pointer. Since calling this function does not make sense
        // if params == null, issue a GL error to notify user about it.
        GL.recordError(0x501 /* GL_INVALID_VALUE */);
        return;
      }
      var data = GLctx.getVertexAttrib(index, pname);
      if (pname == 0x889F/*VERTEX_ATTRIB_ARRAY_BUFFER_BINDING*/) {
        HEAP32[((params)>>2)] = data && data["name"];
      } else if (typeof data == 'number' || typeof data == 'boolean') {
        switch (type) {
          case 0: HEAP32[((params)>>2)] = data; break;
          case 2: HEAPF32[((params)>>2)] = data; break;
          case 5: HEAP32[((params)>>2)] = Math.fround(data); break;
        }
      } else {
        for (var i = 0; i < data.length; i++) {
          switch (type) {
            case 0: HEAP32[(((params)+(i*4))>>2)] = data[i]; break;
            case 2: HEAPF32[(((params)+(i*4))>>2)] = data[i]; break;
            case 5: HEAP32[(((params)+(i*4))>>2)] = Math.fround(data[i]); break;
          }
        }
      }
    }
  
  /** @suppress {duplicate } */
  function _glGetVertexAttribfv(index, pname, params) {
      // N.B. This function may only be called if the vertex attribute was specified using the function glVertexAttrib*f(),
      // otherwise the results are undefined. (GLES3 spec 6.1.12)
      emscriptenWebGLGetVertexAttrib(index, pname, params, 2);
    }
  var _emscripten_glGetVertexAttribfv = _glGetVertexAttribfv;

  
  /** @suppress {duplicate } */
  function _glGetVertexAttribiv(index, pname, params) {
      // N.B. This function may only be called if the vertex attribute was specified using the function glVertexAttrib*f(),
      // otherwise the results are undefined. (GLES3 spec 6.1.12)
      emscriptenWebGLGetVertexAttrib(index, pname, params, 5);
    }
  var _emscripten_glGetVertexAttribiv = _glGetVertexAttribiv;

  /** @suppress {duplicate } */
  function _glHint(x0, x1) { GLctx.hint(x0, x1) }
  var _emscripten_glHint = _glHint;

  /** @suppress {duplicate } */
  function _glIsBuffer(buffer) {
      var b = GL.buffers[buffer];
      if (!b) return 0;
      return GLctx.isBuffer(b);
    }
  var _emscripten_glIsBuffer = _glIsBuffer;

  /** @suppress {duplicate } */
  function _glIsEnabled(x0) { return GLctx.isEnabled(x0) }
  var _emscripten_glIsEnabled = _glIsEnabled;

  /** @suppress {duplicate } */
  function _glIsFramebuffer(framebuffer) {
      var fb = GL.framebuffers[framebuffer];
      if (!fb) return 0;
      return GLctx.isFramebuffer(fb);
    }
  var _emscripten_glIsFramebuffer = _glIsFramebuffer;

  /** @suppress {duplicate } */
  function _glIsProgram(program) {
      program = GL.programs[program];
      if (!program) return 0;
      return GLctx.isProgram(program);
    }
  var _emscripten_glIsProgram = _glIsProgram;

  /** @suppress {duplicate } */
  function _glIsQueryEXT(id) {
      var query = GL.queries[id];
      if (!query) return 0;
      return GLctx.disjointTimerQueryExt['isQueryEXT'](query);
    }
  var _emscripten_glIsQueryEXT = _glIsQueryEXT;

  /** @suppress {duplicate } */
  function _glIsRenderbuffer(renderbuffer) {
      var rb = GL.renderbuffers[renderbuffer];
      if (!rb) return 0;
      return GLctx.isRenderbuffer(rb);
    }
  var _emscripten_glIsRenderbuffer = _glIsRenderbuffer;

  /** @suppress {duplicate } */
  function _glIsShader(shader) {
      var s = GL.shaders[shader];
      if (!s) return 0;
      return GLctx.isShader(s);
    }
  var _emscripten_glIsShader = _glIsShader;

  /** @suppress {duplicate } */
  function _glIsTexture(id) {
      var texture = GL.textures[id];
      if (!texture) return 0;
      return GLctx.isTexture(texture);
    }
  var _emscripten_glIsTexture = _glIsTexture;

  
  /** @suppress {duplicate } */
  function _glIsVertexArray(array) {
  
      var vao = GL.vaos[array];
      if (!vao) return 0;
      return GLctx.isVertexArray(vao);
    }
  /** @suppress {duplicate } */
  var _glIsVertexArrayOES = _glIsVertexArray;
  var _emscripten_glIsVertexArrayOES = _glIsVertexArrayOES;

  /** @suppress {duplicate } */
  function _glLineWidth(x0) { GLctx.lineWidth(x0) }
  var _emscripten_glLineWidth = _glLineWidth;

  /** @suppress {duplicate } */
  function _glLinkProgram(program) {
      program = GL.programs[program];
      GLctx.linkProgram(program);
      // Invalidate earlier computed uniform->ID mappings, those have now become stale
      program.uniformLocsById = 0; // Mark as null-like so that glGetUniformLocation() knows to populate this again.
      program.uniformSizeAndIdsByName = {};
  
    }
  var _emscripten_glLinkProgram = _glLinkProgram;

  /** @suppress {duplicate } */
  function _glPixelStorei(pname, param) {
      if (pname == 0xCF5 /* GL_UNPACK_ALIGNMENT */) {
        GL.unpackAlignment = param;
      }
      GLctx.pixelStorei(pname, param);
    }
  var _emscripten_glPixelStorei = _glPixelStorei;

  /** @suppress {duplicate } */
  function _glPolygonOffset(x0, x1) { GLctx.polygonOffset(x0, x1) }
  var _emscripten_glPolygonOffset = _glPolygonOffset;

  /** @suppress {duplicate } */
  function _glQueryCounterEXT(id, target) {
      GLctx.disjointTimerQueryExt['queryCounterEXT'](GL.queries[id], target);
    }
  var _emscripten_glQueryCounterEXT = _glQueryCounterEXT;

  function computeUnpackAlignedImageSize(width, height, sizePerPixel, alignment) {
      function roundedToNextMultipleOf(x, y) {
        return (x + y - 1) & -y;
      }
      var plainRowSize = width * sizePerPixel;
      var alignedRowSize = roundedToNextMultipleOf(plainRowSize, alignment);
      return height * alignedRowSize;
    }
  
  function colorChannelsInGlTextureFormat(format) {
      // Micro-optimizations for size: map format to size by subtracting smallest enum value (0x1902) from all values first.
      // Also omit the most common size value (1) from the list, which is assumed by formats not on the list.
      var colorChannels = {
        // 0x1902 /* GL_DEPTH_COMPONENT */ - 0x1902: 1,
        // 0x1906 /* GL_ALPHA */ - 0x1902: 1,
        5: 3,
        6: 4,
        // 0x1909 /* GL_LUMINANCE */ - 0x1902: 1,
        8: 2,
        29502: 3,
        29504: 4,
      };
      return colorChannels[format - 0x1902]||1;
    }
  
  function heapObjectForWebGLType(type) {
      // Micro-optimization for size: Subtract lowest GL enum number (0x1400/* GL_BYTE */) from type to compare
      // smaller values for the heap, for shorter generated code size.
      // Also the type HEAPU16 is not tested for explicitly, but any unrecognized type will return out HEAPU16.
      // (since most types are HEAPU16)
      type -= 0x1400;
  
      if (type == 1) return HEAPU8;
  
      if (type == 4) return HEAP32;
  
      if (type == 6) return HEAPF32;
  
      if (type == 5
        || type == 28922
        )
        return HEAPU32;
  
      return HEAPU16;
    }
  
  function heapAccessShiftForWebGLHeap(heap) {
      return 31 - Math.clz32(heap.BYTES_PER_ELEMENT);
    }
  
  function emscriptenWebGLGetTexPixelData(type, format, width, height, pixels, internalFormat) {
      var heap = heapObjectForWebGLType(type);
      var shift = heapAccessShiftForWebGLHeap(heap);
      var byteSize = 1<<shift;
      var sizePerPixel = colorChannelsInGlTextureFormat(format) * byteSize;
      var bytes = computeUnpackAlignedImageSize(width, height, sizePerPixel, GL.unpackAlignment);
      return heap.subarray(pixels >> shift, pixels + bytes >> shift);
    }
  
  /** @suppress {duplicate } */
  function _glReadPixels(x, y, width, height, format, type, pixels) {
      var pixelData = emscriptenWebGLGetTexPixelData(type, format, width, height, pixels, format);
      if (!pixelData) {
        GL.recordError(0x500/*GL_INVALID_ENUM*/);
        return;
      }
      GLctx.readPixels(x, y, width, height, format, type, pixelData);
    }
  var _emscripten_glReadPixels = _glReadPixels;

  /** @suppress {duplicate } */
  function _glReleaseShaderCompiler() {
      // NOP (as allowed by GLES 2.0 spec)
    }
  var _emscripten_glReleaseShaderCompiler = _glReleaseShaderCompiler;

  /** @suppress {duplicate } */
  function _glRenderbufferStorage(x0, x1, x2, x3) { GLctx.renderbufferStorage(x0, x1, x2, x3) }
  var _emscripten_glRenderbufferStorage = _glRenderbufferStorage;

  /** @suppress {duplicate } */
  function _glSampleCoverage(value, invert) {
      GLctx.sampleCoverage(value, !!invert);
    }
  var _emscripten_glSampleCoverage = _glSampleCoverage;

  /** @suppress {duplicate } */
  function _glScissor(x0, x1, x2, x3) { GLctx.scissor(x0, x1, x2, x3) }
  var _emscripten_glScissor = _glScissor;

  /** @suppress {duplicate } */
  function _glShaderBinary(count, shaders, binaryformat, binary, length) {
      GL.recordError(0x500/*GL_INVALID_ENUM*/);
    }
  var _emscripten_glShaderBinary = _glShaderBinary;

  /** @suppress {duplicate } */
  function _glShaderSource(shader, count, string, length) {
      var source = GL.getSource(shader, count, string, length);
  
      GLctx.shaderSource(GL.shaders[shader], source);
    }
  var _emscripten_glShaderSource = _glShaderSource;

  /** @suppress {duplicate } */
  function _glStencilFunc(x0, x1, x2) { GLctx.stencilFunc(x0, x1, x2) }
  var _emscripten_glStencilFunc = _glStencilFunc;

  /** @suppress {duplicate } */
  function _glStencilFuncSeparate(x0, x1, x2, x3) { GLctx.stencilFuncSeparate(x0, x1, x2, x3) }
  var _emscripten_glStencilFuncSeparate = _glStencilFuncSeparate;

  /** @suppress {duplicate } */
  function _glStencilMask(x0) { GLctx.stencilMask(x0) }
  var _emscripten_glStencilMask = _glStencilMask;

  /** @suppress {duplicate } */
  function _glStencilMaskSeparate(x0, x1) { GLctx.stencilMaskSeparate(x0, x1) }
  var _emscripten_glStencilMaskSeparate = _glStencilMaskSeparate;

  /** @suppress {duplicate } */
  function _glStencilOp(x0, x1, x2) { GLctx.stencilOp(x0, x1, x2) }
  var _emscripten_glStencilOp = _glStencilOp;

  /** @suppress {duplicate } */
  function _glStencilOpSeparate(x0, x1, x2, x3) { GLctx.stencilOpSeparate(x0, x1, x2, x3) }
  var _emscripten_glStencilOpSeparate = _glStencilOpSeparate;

  
  /** @suppress {duplicate } */
  function _glTexImage2D(target, level, internalFormat, width, height, border, format, type, pixels) {
      GLctx.texImage2D(target, level, internalFormat, width, height, border, format, type, pixels ? emscriptenWebGLGetTexPixelData(type, format, width, height, pixels, internalFormat) : null);
    }
  var _emscripten_glTexImage2D = _glTexImage2D;

  /** @suppress {duplicate } */
  function _glTexParameterf(x0, x1, x2) { GLctx.texParameterf(x0, x1, x2) }
  var _emscripten_glTexParameterf = _glTexParameterf;

  /** @suppress {duplicate } */
  function _glTexParameterfv(target, pname, params) {
      var param = HEAPF32[((params)>>2)];
      GLctx.texParameterf(target, pname, param);
    }
  var _emscripten_glTexParameterfv = _glTexParameterfv;

  /** @suppress {duplicate } */
  function _glTexParameteri(x0, x1, x2) { GLctx.texParameteri(x0, x1, x2) }
  var _emscripten_glTexParameteri = _glTexParameteri;

  /** @suppress {duplicate } */
  function _glTexParameteriv(target, pname, params) {
      var param = HEAP32[((params)>>2)];
      GLctx.texParameteri(target, pname, param);
    }
  var _emscripten_glTexParameteriv = _glTexParameteriv;

  
  /** @suppress {duplicate } */
  function _glTexSubImage2D(target, level, xoffset, yoffset, width, height, format, type, pixels) {
      var pixelData = null;
      if (pixels) pixelData = emscriptenWebGLGetTexPixelData(type, format, width, height, pixels, 0);
      GLctx.texSubImage2D(target, level, xoffset, yoffset, width, height, format, type, pixelData);
    }
  var _emscripten_glTexSubImage2D = _glTexSubImage2D;

  
  /** @suppress {duplicate } */
  function _glUniform1f(location, v0) {
      GLctx.uniform1f(webglGetUniformLocation(location), v0);
    }
  var _emscripten_glUniform1f = _glUniform1f;

  
  var miniTempWebGLFloatBuffers = [];
  
  /** @suppress {duplicate } */
  function _glUniform1fv(location, count, value) {
  
      if (count <= 288) {
        // avoid allocation when uploading few enough uniforms
        var view = miniTempWebGLFloatBuffers[count-1];
        for (var i = 0; i < count; ++i) {
          view[i] = HEAPF32[(((value)+(4*i))>>2)];
        }
      } else
      {
        var view = HEAPF32.subarray((value)>>2, (value+count*4)>>2);
      }
      GLctx.uniform1fv(webglGetUniformLocation(location), view);
    }
  var _emscripten_glUniform1fv = _glUniform1fv;

  
  /** @suppress {duplicate } */
  function _glUniform1i(location, v0) {
      GLctx.uniform1i(webglGetUniformLocation(location), v0);
    }
  var _emscripten_glUniform1i = _glUniform1i;

  
  var miniTempWebGLIntBuffers = [];
  
  /** @suppress {duplicate } */
  function _glUniform1iv(location, count, value) {
  
      if (count <= 288) {
        // avoid allocation when uploading few enough uniforms
        var view = miniTempWebGLIntBuffers[count-1];
        for (var i = 0; i < count; ++i) {
          view[i] = HEAP32[(((value)+(4*i))>>2)];
        }
      } else
      {
        var view = HEAP32.subarray((value)>>2, (value+count*4)>>2);
      }
      GLctx.uniform1iv(webglGetUniformLocation(location), view);
    }
  var _emscripten_glUniform1iv = _glUniform1iv;

  
  /** @suppress {duplicate } */
  function _glUniform2f(location, v0, v1) {
      GLctx.uniform2f(webglGetUniformLocation(location), v0, v1);
    }
  var _emscripten_glUniform2f = _glUniform2f;

  
  
  /** @suppress {duplicate } */
  function _glUniform2fv(location, count, value) {
  
      if (count <= 144) {
        // avoid allocation when uploading few enough uniforms
        var view = miniTempWebGLFloatBuffers[2*count-1];
        for (var i = 0; i < 2*count; i += 2) {
          view[i] = HEAPF32[(((value)+(4*i))>>2)];
          view[i+1] = HEAPF32[(((value)+(4*i+4))>>2)];
        }
      } else
      {
        var view = HEAPF32.subarray((value)>>2, (value+count*8)>>2);
      }
      GLctx.uniform2fv(webglGetUniformLocation(location), view);
    }
  var _emscripten_glUniform2fv = _glUniform2fv;

  
  /** @suppress {duplicate } */
  function _glUniform2i(location, v0, v1) {
      GLctx.uniform2i(webglGetUniformLocation(location), v0, v1);
    }
  var _emscripten_glUniform2i = _glUniform2i;

  
  
  /** @suppress {duplicate } */
  function _glUniform2iv(location, count, value) {
  
      if (count <= 144) {
        // avoid allocation when uploading few enough uniforms
        var view = miniTempWebGLIntBuffers[2*count-1];
        for (var i = 0; i < 2*count; i += 2) {
          view[i] = HEAP32[(((value)+(4*i))>>2)];
          view[i+1] = HEAP32[(((value)+(4*i+4))>>2)];
        }
      } else
      {
        var view = HEAP32.subarray((value)>>2, (value+count*8)>>2);
      }
      GLctx.uniform2iv(webglGetUniformLocation(location), view);
    }
  var _emscripten_glUniform2iv = _glUniform2iv;

  
  /** @suppress {duplicate } */
  function _glUniform3f(location, v0, v1, v2) {
      GLctx.uniform3f(webglGetUniformLocation(location), v0, v1, v2);
    }
  var _emscripten_glUniform3f = _glUniform3f;

  
  
  /** @suppress {duplicate } */
  function _glUniform3fv(location, count, value) {
  
      if (count <= 96) {
        // avoid allocation when uploading few enough uniforms
        var view = miniTempWebGLFloatBuffers[3*count-1];
        for (var i = 0; i < 3*count; i += 3) {
          view[i] = HEAPF32[(((value)+(4*i))>>2)];
          view[i+1] = HEAPF32[(((value)+(4*i+4))>>2)];
          view[i+2] = HEAPF32[(((value)+(4*i+8))>>2)];
        }
      } else
      {
        var view = HEAPF32.subarray((value)>>2, (value+count*12)>>2);
      }
      GLctx.uniform3fv(webglGetUniformLocation(location), view);
    }
  var _emscripten_glUniform3fv = _glUniform3fv;

  
  /** @suppress {duplicate } */
  function _glUniform3i(location, v0, v1, v2) {
      GLctx.uniform3i(webglGetUniformLocation(location), v0, v1, v2);
    }
  var _emscripten_glUniform3i = _glUniform3i;

  
  
  /** @suppress {duplicate } */
  function _glUniform3iv(location, count, value) {
  
      if (count <= 96) {
        // avoid allocation when uploading few enough uniforms
        var view = miniTempWebGLIntBuffers[3*count-1];
        for (var i = 0; i < 3*count; i += 3) {
          view[i] = HEAP32[(((value)+(4*i))>>2)];
          view[i+1] = HEAP32[(((value)+(4*i+4))>>2)];
          view[i+2] = HEAP32[(((value)+(4*i+8))>>2)];
        }
      } else
      {
        var view = HEAP32.subarray((value)>>2, (value+count*12)>>2);
      }
      GLctx.uniform3iv(webglGetUniformLocation(location), view);
    }
  var _emscripten_glUniform3iv = _glUniform3iv;

  
  /** @suppress {duplicate } */
  function _glUniform4f(location, v0, v1, v2, v3) {
      GLctx.uniform4f(webglGetUniformLocation(location), v0, v1, v2, v3);
    }
  var _emscripten_glUniform4f = _glUniform4f;

  
  
  /** @suppress {duplicate } */
  function _glUniform4fv(location, count, value) {
  
      if (count <= 72) {
        // avoid allocation when uploading few enough uniforms
        var view = miniTempWebGLFloatBuffers[4*count-1];
        // hoist the heap out of the loop for size and for pthreads+growth.
        var heap = HEAPF32;
        value >>= 2;
        for (var i = 0; i < 4 * count; i += 4) {
          var dst = value + i;
          view[i] = heap[dst];
          view[i + 1] = heap[dst + 1];
          view[i + 2] = heap[dst + 2];
          view[i + 3] = heap[dst + 3];
        }
      } else
      {
        var view = HEAPF32.subarray((value)>>2, (value+count*16)>>2);
      }
      GLctx.uniform4fv(webglGetUniformLocation(location), view);
    }
  var _emscripten_glUniform4fv = _glUniform4fv;

  
  /** @suppress {duplicate } */
  function _glUniform4i(location, v0, v1, v2, v3) {
      GLctx.uniform4i(webglGetUniformLocation(location), v0, v1, v2, v3);
    }
  var _emscripten_glUniform4i = _glUniform4i;

  
  
  /** @suppress {duplicate } */
  function _glUniform4iv(location, count, value) {
  
      if (count <= 72) {
        // avoid allocation when uploading few enough uniforms
        var view = miniTempWebGLIntBuffers[4*count-1];
        for (var i = 0; i < 4*count; i += 4) {
          view[i] = HEAP32[(((value)+(4*i))>>2)];
          view[i+1] = HEAP32[(((value)+(4*i+4))>>2)];
          view[i+2] = HEAP32[(((value)+(4*i+8))>>2)];
          view[i+3] = HEAP32[(((value)+(4*i+12))>>2)];
        }
      } else
      {
        var view = HEAP32.subarray((value)>>2, (value+count*16)>>2);
      }
      GLctx.uniform4iv(webglGetUniformLocation(location), view);
    }
  var _emscripten_glUniform4iv = _glUniform4iv;

  
  
  /** @suppress {duplicate } */
  function _glUniformMatrix2fv(location, count, transpose, value) {
  
      if (count <= 72) {
        // avoid allocation when uploading few enough uniforms
        var view = miniTempWebGLFloatBuffers[4*count-1];
        for (var i = 0; i < 4*count; i += 4) {
          view[i] = HEAPF32[(((value)+(4*i))>>2)];
          view[i+1] = HEAPF32[(((value)+(4*i+4))>>2)];
          view[i+2] = HEAPF32[(((value)+(4*i+8))>>2)];
          view[i+3] = HEAPF32[(((value)+(4*i+12))>>2)];
        }
      } else
      {
        var view = HEAPF32.subarray((value)>>2, (value+count*16)>>2);
      }
      GLctx.uniformMatrix2fv(webglGetUniformLocation(location), !!transpose, view);
    }
  var _emscripten_glUniformMatrix2fv = _glUniformMatrix2fv;

  
  
  /** @suppress {duplicate } */
  function _glUniformMatrix3fv(location, count, transpose, value) {
  
      if (count <= 32) {
        // avoid allocation when uploading few enough uniforms
        var view = miniTempWebGLFloatBuffers[9*count-1];
        for (var i = 0; i < 9*count; i += 9) {
          view[i] = HEAPF32[(((value)+(4*i))>>2)];
          view[i+1] = HEAPF32[(((value)+(4*i+4))>>2)];
          view[i+2] = HEAPF32[(((value)+(4*i+8))>>2)];
          view[i+3] = HEAPF32[(((value)+(4*i+12))>>2)];
          view[i+4] = HEAPF32[(((value)+(4*i+16))>>2)];
          view[i+5] = HEAPF32[(((value)+(4*i+20))>>2)];
          view[i+6] = HEAPF32[(((value)+(4*i+24))>>2)];
          view[i+7] = HEAPF32[(((value)+(4*i+28))>>2)];
          view[i+8] = HEAPF32[(((value)+(4*i+32))>>2)];
        }
      } else
      {
        var view = HEAPF32.subarray((value)>>2, (value+count*36)>>2);
      }
      GLctx.uniformMatrix3fv(webglGetUniformLocation(location), !!transpose, view);
    }
  var _emscripten_glUniformMatrix3fv = _glUniformMatrix3fv;

  
  
  /** @suppress {duplicate } */
  function _glUniformMatrix4fv(location, count, transpose, value) {
  
      if (count <= 18) {
        // avoid allocation when uploading few enough uniforms
        var view = miniTempWebGLFloatBuffers[16*count-1];
        // hoist the heap out of the loop for size and for pthreads+growth.
        var heap = HEAPF32;
        value >>= 2;
        for (var i = 0; i < 16 * count; i += 16) {
          var dst = value + i;
          view[i] = heap[dst];
          view[i + 1] = heap[dst + 1];
          view[i + 2] = heap[dst + 2];
          view[i + 3] = heap[dst + 3];
          view[i + 4] = heap[dst + 4];
          view[i + 5] = heap[dst + 5];
          view[i + 6] = heap[dst + 6];
          view[i + 7] = heap[dst + 7];
          view[i + 8] = heap[dst + 8];
          view[i + 9] = heap[dst + 9];
          view[i + 10] = heap[dst + 10];
          view[i + 11] = heap[dst + 11];
          view[i + 12] = heap[dst + 12];
          view[i + 13] = heap[dst + 13];
          view[i + 14] = heap[dst + 14];
          view[i + 15] = heap[dst + 15];
        }
      } else
      {
        var view = HEAPF32.subarray((value)>>2, (value+count*64)>>2);
      }
      GLctx.uniformMatrix4fv(webglGetUniformLocation(location), !!transpose, view);
    }
  var _emscripten_glUniformMatrix4fv = _glUniformMatrix4fv;

  /** @suppress {duplicate } */
  function _glUseProgram(program) {
      program = GL.programs[program];
      GLctx.useProgram(program);
      // Record the currently active program so that we can access the uniform
      // mapping table of that program.
      GLctx.currentProgram = program;
    }
  var _emscripten_glUseProgram = _glUseProgram;

  /** @suppress {duplicate } */
  function _glValidateProgram(program) {
      GLctx.validateProgram(GL.programs[program]);
    }
  var _emscripten_glValidateProgram = _glValidateProgram;

  /** @suppress {duplicate } */
  function _glVertexAttrib1f(x0, x1) { GLctx.vertexAttrib1f(x0, x1) }
  var _emscripten_glVertexAttrib1f = _glVertexAttrib1f;

  /** @suppress {duplicate } */
  function _glVertexAttrib1fv(index, v) {
  
      GLctx.vertexAttrib1f(index, HEAPF32[v>>2]);
    }
  var _emscripten_glVertexAttrib1fv = _glVertexAttrib1fv;

  /** @suppress {duplicate } */
  function _glVertexAttrib2f(x0, x1, x2) { GLctx.vertexAttrib2f(x0, x1, x2) }
  var _emscripten_glVertexAttrib2f = _glVertexAttrib2f;

  /** @suppress {duplicate } */
  function _glVertexAttrib2fv(index, v) {
  
      GLctx.vertexAttrib2f(index, HEAPF32[v>>2], HEAPF32[v+4>>2]);
    }
  var _emscripten_glVertexAttrib2fv = _glVertexAttrib2fv;

  /** @suppress {duplicate } */
  function _glVertexAttrib3f(x0, x1, x2, x3) { GLctx.vertexAttrib3f(x0, x1, x2, x3) }
  var _emscripten_glVertexAttrib3f = _glVertexAttrib3f;

  /** @suppress {duplicate } */
  function _glVertexAttrib3fv(index, v) {
  
      GLctx.vertexAttrib3f(index, HEAPF32[v>>2], HEAPF32[v+4>>2], HEAPF32[v+8>>2]);
    }
  var _emscripten_glVertexAttrib3fv = _glVertexAttrib3fv;

  /** @suppress {duplicate } */
  function _glVertexAttrib4f(x0, x1, x2, x3, x4) { GLctx.vertexAttrib4f(x0, x1, x2, x3, x4) }
  var _emscripten_glVertexAttrib4f = _glVertexAttrib4f;

  /** @suppress {duplicate } */
  function _glVertexAttrib4fv(index, v) {
  
      GLctx.vertexAttrib4f(index, HEAPF32[v>>2], HEAPF32[v+4>>2], HEAPF32[v+8>>2], HEAPF32[v+12>>2]);
    }
  var _emscripten_glVertexAttrib4fv = _glVertexAttrib4fv;

  
  /** @suppress {duplicate } */
  function _glVertexAttribDivisor(index, divisor) {
      GLctx.vertexAttribDivisor(index, divisor);
    }
  /** @suppress {duplicate } */
  var _glVertexAttribDivisorANGLE = _glVertexAttribDivisor;
  var _emscripten_glVertexAttribDivisorANGLE = _glVertexAttribDivisorANGLE;

  /** @suppress {duplicate } */
  function _glVertexAttribPointer(index, size, type, normalized, stride, ptr) {
      GLctx.vertexAttribPointer(index, size, type, !!normalized, stride, ptr);
    }
  var _emscripten_glVertexAttribPointer = _glVertexAttribPointer;

  /** @suppress {duplicate } */
  function _glViewport(x0, x1, x2, x3) { GLctx.viewport(x0, x1, x2, x3) }
  var _emscripten_glViewport = _glViewport;

  var _emscripten_has_asyncify = () => 0;

  var _emscripten_memcpy_big = (dest, src, num) => HEAPU8.copyWithin(dest, src, src + num);

  
  
  
  
  
  
  
  function doRequestFullscreen(target, strategy) {
      if (!JSEvents.fullscreenEnabled()) return -1;
      target = findEventTarget(target);
      if (!target) return -4;
  
      if (!target.requestFullscreen
        && !target.webkitRequestFullscreen
        ) {
        return -3;
      }
  
      var canPerformRequests = JSEvents.canPerformEventHandlerRequests();
  
      // Queue this function call if we're not currently in an event handler and the user saw it appropriate to do so.
      if (!canPerformRequests) {
        if (strategy.deferUntilInEventHandler) {
          JSEvents.deferCall(JSEvents_requestFullscreen, 1 /* priority over pointer lock */, [target, strategy]);
          return 1;
        }
        return -2;
      }
  
      return JSEvents_requestFullscreen(target, strategy);
    }
  
  
  function _emscripten_request_fullscreen_strategy(target, deferUntilInEventHandler, fullscreenStrategy) {
      var strategy = {
        scaleMode: HEAP32[((fullscreenStrategy)>>2)],
        canvasResolutionScaleMode: HEAP32[(((fullscreenStrategy)+(4))>>2)],
        filteringMode: HEAP32[(((fullscreenStrategy)+(8))>>2)],
        deferUntilInEventHandler,
        canvasResizedCallback: HEAP32[(((fullscreenStrategy)+(12))>>2)],
        canvasResizedCallbackUserData: HEAP32[(((fullscreenStrategy)+(16))>>2)]
      };
  
      return doRequestFullscreen(target, strategy);
    }

  
  
  function _emscripten_request_pointerlock(target, deferUntilInEventHandler) {
      target = findEventTarget(target);
      if (!target) return -4;
      if (!target.requestPointerLock
        ) {
        return -1;
      }
  
      var canPerformRequests = JSEvents.canPerformEventHandlerRequests();
  
      // Queue this function call if we're not currently in an event handler and the user saw it appropriate to do so.
      if (!canPerformRequests) {
        if (deferUntilInEventHandler) {
          JSEvents.deferCall(requestPointerLock, 2 /* priority below fullscreen */, [target]);
          return 1;
        }
        return -2;
      }
  
      return requestPointerLock(target);
    }

  var getHeapMax = () =>
      HEAPU8.length;
  
  var abortOnCannotGrowMemory = (requestedSize) => {
      abort(`Cannot enlarge memory arrays to size ${requestedSize} bytes (OOM). Either (1) compile with -sINITIAL_MEMORY=X with X higher than the current value ${HEAP8.length}, (2) compile with -sALLOW_MEMORY_GROWTH which allows increasing the size at runtime, or (3) if you want malloc to return NULL (0) instead of this abort, compile with -sABORTING_MALLOC=0`);
    };
  var _emscripten_resize_heap = (requestedSize) => {
      var oldSize = HEAPU8.length;
      requestedSize = requestedSize >>> 0;
      abortOnCannotGrowMemory(requestedSize);
    };

  function _emscripten_sample_gamepad_data() {
      return (JSEvents.lastGamepadState = (navigator.getGamepads ? navigator.getGamepads() : (navigator.webkitGetGamepads ? navigator.webkitGetGamepads() : null)))
        ? 0 : -1;
    }

  
  
  
  function registerBeforeUnloadEventCallback(target, userData, useCapture, callbackfunc, eventTypeId, eventTypeString) {
      var beforeUnloadEventHandlerFunc = function(e = event) {
        // Note: This is always called on the main browser thread, since it needs synchronously return a value!
        var confirmationMessage = getWasmTableEntry(callbackfunc)(eventTypeId, 0, userData);
        
        if (confirmationMessage) {
          confirmationMessage = UTF8ToString(confirmationMessage);
        }
        if (confirmationMessage) {
          e.preventDefault();
          e.returnValue = confirmationMessage;
          return confirmationMessage;
        }
      };
  
      var eventHandler = {
        target: findEventTarget(target),
        eventTypeString,
        callbackfunc,
        handlerFunc: beforeUnloadEventHandlerFunc,
        useCapture
      };
      return JSEvents.registerOrRemoveHandler(eventHandler);
    }
  function _emscripten_set_beforeunload_callback_on_thread(userData, callbackfunc, targetThread) {
      if (typeof onbeforeunload == 'undefined') return -1;
      // beforeunload callback can only be registered on the main browser thread, because the page will go away immediately after returning from the handler,
      // and there is no time to start proxying it anywhere.
      if (targetThread !== 1) return -5;
      return registerBeforeUnloadEventCallback(2, userData, true, callbackfunc, 28, "beforeunload");
    }

  
  
  
  
  function registerFocusEventCallback(target, userData, useCapture, callbackfunc, eventTypeId, eventTypeString, targetThread) {
      if (!JSEvents.focusEvent) JSEvents.focusEvent = _malloc( 256 );
  
      var focusEventHandlerFunc = function(e = event) {
        var nodeName = JSEvents.getNodeNameForTarget(e.target);
        var id = e.target.id ? e.target.id : '';
  
        var focusEvent = JSEvents.focusEvent;
        stringToUTF8(nodeName, focusEvent + 0, 128);
        stringToUTF8(id, focusEvent + 128, 128);
  
        if (getWasmTableEntry(callbackfunc)(eventTypeId, focusEvent, userData)) e.preventDefault();
      };
  
      var eventHandler = {
        target: findEventTarget(target),
        eventTypeString,
        callbackfunc,
        handlerFunc: focusEventHandlerFunc,
        useCapture
      };
      return JSEvents.registerOrRemoveHandler(eventHandler);
    }
  function _emscripten_set_blur_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
      return registerFocusEventCallback(target, userData, useCapture, callbackfunc, 12, "blur", targetThread);
    }


  
  function _emscripten_set_element_css_size(target, width, height) {
      target = findEventTarget(target);
      if (!target) return -4;
  
      target.style.width = width + "px";
      target.style.height = height + "px";
  
      return 0;
    }

  function _emscripten_set_focus_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
      return registerFocusEventCallback(target, userData, useCapture, callbackfunc, 13, "focus", targetThread);
    }

  
  
  
  function fillFullscreenChangeEventData(eventStruct) {
      var fullscreenElement = document.fullscreenElement || document.mozFullScreenElement || document.webkitFullscreenElement || document.msFullscreenElement;
      var isFullscreen = !!fullscreenElement;
      // Assigning a boolean to HEAP32 with expected type coercion.
      /** @suppress{checkTypes} */
      HEAP32[((eventStruct)>>2)] = isFullscreen;
      HEAP32[(((eventStruct)+(4))>>2)] = JSEvents.fullscreenEnabled();
      // If transitioning to fullscreen, report info about the element that is now fullscreen.
      // If transitioning to windowed mode, report info about the element that just was fullscreen.
      var reportedElement = isFullscreen ? fullscreenElement : JSEvents.previousFullscreenElement;
      var nodeName = JSEvents.getNodeNameForTarget(reportedElement);
      var id = (reportedElement && reportedElement.id) ? reportedElement.id : '';
      stringToUTF8(nodeName, eventStruct + 8, 128);
      stringToUTF8(id, eventStruct + 136, 128);
      HEAP32[(((eventStruct)+(264))>>2)] = reportedElement ? reportedElement.clientWidth : 0;
      HEAP32[(((eventStruct)+(268))>>2)] = reportedElement ? reportedElement.clientHeight : 0;
      HEAP32[(((eventStruct)+(272))>>2)] = screen.width;
      HEAP32[(((eventStruct)+(276))>>2)] = screen.height;
      if (isFullscreen) {
        JSEvents.previousFullscreenElement = fullscreenElement;
      }
    }
  
  
  
  function registerFullscreenChangeEventCallback(target, userData, useCapture, callbackfunc, eventTypeId, eventTypeString, targetThread) {
      if (!JSEvents.fullscreenChangeEvent) JSEvents.fullscreenChangeEvent = _malloc( 280 );
  
      var fullscreenChangeEventhandlerFunc = function(e = event) {
        var fullscreenChangeEvent = JSEvents.fullscreenChangeEvent;
  
        fillFullscreenChangeEventData(fullscreenChangeEvent);
  
        if (getWasmTableEntry(callbackfunc)(eventTypeId, fullscreenChangeEvent, userData)) e.preventDefault();
      };
  
      var eventHandler = {
        target,
        eventTypeString,
        callbackfunc,
        handlerFunc: fullscreenChangeEventhandlerFunc,
        useCapture
      };
      return JSEvents.registerOrRemoveHandler(eventHandler);
    }
  
  
  function _emscripten_set_fullscreenchange_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
      if (!JSEvents.fullscreenEnabled()) return -1;
      target = findEventTarget(target);
      if (!target) return -4;
  
      // Unprefixed Fullscreen API shipped in Chromium 71 (https://bugs.chromium.org/p/chromium/issues/detail?id=383813)
      // As of Safari 13.0.3 on macOS Catalina 10.15.1 still ships with prefixed webkitfullscreenchange. TODO: revisit this check once Safari ships unprefixed version.
      registerFullscreenChangeEventCallback(target, userData, useCapture, callbackfunc, 19, "webkitfullscreenchange", targetThread);
  
      return registerFullscreenChangeEventCallback(target, userData, useCapture, callbackfunc, 19, "fullscreenchange", targetThread);
    }

  
  
  
  
  function registerGamepadEventCallback(target, userData, useCapture, callbackfunc, eventTypeId, eventTypeString, targetThread) {
      if (!JSEvents.gamepadEvent) JSEvents.gamepadEvent = _malloc( 1432 );
  
      var gamepadEventHandlerFunc = function(e = event) {
        var gamepadEvent = JSEvents.gamepadEvent;
        fillGamepadEventData(gamepadEvent, e["gamepad"]);
  
        if (getWasmTableEntry(callbackfunc)(eventTypeId, gamepadEvent, userData)) e.preventDefault();
      };
  
      var eventHandler = {
        target: findEventTarget(target),
        allowsDeferredCalls: true,
        eventTypeString,
        callbackfunc,
        handlerFunc: gamepadEventHandlerFunc,
        useCapture
      };
      return JSEvents.registerOrRemoveHandler(eventHandler);
    }
  function _emscripten_set_gamepadconnected_callback_on_thread(userData, useCapture, callbackfunc, targetThread) {
      if (!navigator.getGamepads && !navigator.webkitGetGamepads) return -1;
      return registerGamepadEventCallback(2, userData, useCapture, callbackfunc, 26, "gamepadconnected", targetThread);
    }

  function _emscripten_set_gamepaddisconnected_callback_on_thread(userData, useCapture, callbackfunc, targetThread) {
      if (!navigator.getGamepads && !navigator.webkitGetGamepads) return -1;
      return registerGamepadEventCallback(2, userData, useCapture, callbackfunc, 27, "gamepaddisconnected", targetThread);
    }

  
  
  
  
  function registerKeyEventCallback(target, userData, useCapture, callbackfunc, eventTypeId, eventTypeString, targetThread) {
      if (!JSEvents.keyEvent) JSEvents.keyEvent = _malloc( 176 );
  
      var keyEventHandlerFunc = function(e) {
        assert(e);
  
        var keyEventData = JSEvents.keyEvent;
        HEAPF64[((keyEventData)>>3)] = e.timeStamp;
  
        var idx = keyEventData >> 2;
  
        HEAP32[idx + 2] = e.location;
        HEAP32[idx + 3] = e.ctrlKey;
        HEAP32[idx + 4] = e.shiftKey;
        HEAP32[idx + 5] = e.altKey;
        HEAP32[idx + 6] = e.metaKey;
        HEAP32[idx + 7] = e.repeat;
        HEAP32[idx + 8] = e.charCode;
        HEAP32[idx + 9] = e.keyCode;
        HEAP32[idx + 10] = e.which;
        stringToUTF8(e.key || '', keyEventData + 44, 32);
        stringToUTF8(e.code || '', keyEventData + 76, 32);
        stringToUTF8(e.char || '', keyEventData + 108, 32);
        stringToUTF8(e.locale || '', keyEventData + 140, 32);
  
        if (getWasmTableEntry(callbackfunc)(eventTypeId, keyEventData, userData)) e.preventDefault();
      };
  
      var eventHandler = {
        target: findEventTarget(target),
        allowsDeferredCalls: true,
        eventTypeString,
        callbackfunc,
        handlerFunc: keyEventHandlerFunc,
        useCapture
      };
      return JSEvents.registerOrRemoveHandler(eventHandler);
    }
  function _emscripten_set_keydown_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
      return registerKeyEventCallback(target, userData, useCapture, callbackfunc, 2, "keydown", targetThread);
    }

  function _emscripten_set_keypress_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
      return registerKeyEventCallback(target, userData, useCapture, callbackfunc, 1, "keypress", targetThread);
    }

  function _emscripten_set_keyup_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
      return registerKeyEventCallback(target, userData, useCapture, callbackfunc, 3, "keyup", targetThread);
    }

  
  
  
  function fillMouseEventData(eventStruct, e, target) {
      assert(eventStruct % 4 == 0);
      HEAPF64[((eventStruct)>>3)] = e.timeStamp;
      var idx = eventStruct >> 2;
      HEAP32[idx + 2] = e.screenX;
      HEAP32[idx + 3] = e.screenY;
      HEAP32[idx + 4] = e.clientX;
      HEAP32[idx + 5] = e.clientY;
      HEAP32[idx + 6] = e.ctrlKey;
      HEAP32[idx + 7] = e.shiftKey;
      HEAP32[idx + 8] = e.altKey;
      HEAP32[idx + 9] = e.metaKey;
      HEAP16[idx*2 + 20] = e.button;
      HEAP16[idx*2 + 21] = e.buttons;
  
      HEAP32[idx + 11] = e["movementX"]
        ;
  
      HEAP32[idx + 12] = e["movementY"]
        ;
  
      var rect = getBoundingClientRect(target);
      HEAP32[idx + 13] = e.clientX - rect.left;
      HEAP32[idx + 14] = e.clientY - rect.top;
  
    }
  
  
  
  function registerMouseEventCallback(target, userData, useCapture, callbackfunc, eventTypeId, eventTypeString, targetThread) {
      if (!JSEvents.mouseEvent) JSEvents.mouseEvent = _malloc( 72 );
      target = findEventTarget(target);
  
      var mouseEventHandlerFunc = function(e = event) {
        // TODO: Make this access thread safe, or this could update live while app is reading it.
        fillMouseEventData(JSEvents.mouseEvent, e, target);
  
        if (getWasmTableEntry(callbackfunc)(eventTypeId, JSEvents.mouseEvent, userData)) e.preventDefault();
      };
  
      var eventHandler = {
        target,
        allowsDeferredCalls: eventTypeString != 'mousemove' && eventTypeString != 'mouseenter' && eventTypeString != 'mouseleave', // Mouse move events do not allow fullscreen/pointer lock requests to be handled in them!
        eventTypeString,
        callbackfunc,
        handlerFunc: mouseEventHandlerFunc,
        useCapture
      };
      return JSEvents.registerOrRemoveHandler(eventHandler);
    }
  function _emscripten_set_mousedown_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
      return registerMouseEventCallback(target, userData, useCapture, callbackfunc, 5, "mousedown", targetThread);
    }

  function _emscripten_set_mouseenter_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
      return registerMouseEventCallback(target, userData, useCapture, callbackfunc, 33, "mouseenter", targetThread);
    }

  function _emscripten_set_mouseleave_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
      return registerMouseEventCallback(target, userData, useCapture, callbackfunc, 34, "mouseleave", targetThread);
    }

  function _emscripten_set_mousemove_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
      return registerMouseEventCallback(target, userData, useCapture, callbackfunc, 8, "mousemove", targetThread);
    }

  function _emscripten_set_mouseup_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
      return registerMouseEventCallback(target, userData, useCapture, callbackfunc, 6, "mouseup", targetThread);
    }

  
  
  
  function fillPointerlockChangeEventData(eventStruct) {
      var pointerLockElement = document.pointerLockElement || document.mozPointerLockElement || document.webkitPointerLockElement || document.msPointerLockElement;
      var isPointerlocked = !!pointerLockElement;
      // Assigning a boolean to HEAP32 with expected type coercion.
      /** @suppress{checkTypes} */
      HEAP32[((eventStruct)>>2)] = isPointerlocked;
      var nodeName = JSEvents.getNodeNameForTarget(pointerLockElement);
      var id = (pointerLockElement && pointerLockElement.id) ? pointerLockElement.id : '';
      stringToUTF8(nodeName, eventStruct + 4, 128);
      stringToUTF8(id, eventStruct + 132, 128);
    }
  
  
  
  function registerPointerlockChangeEventCallback(target, userData, useCapture, callbackfunc, eventTypeId, eventTypeString, targetThread) {
      if (!JSEvents.pointerlockChangeEvent) JSEvents.pointerlockChangeEvent = _malloc( 260 );
  
      var pointerlockChangeEventHandlerFunc = function(e = event) {
        var pointerlockChangeEvent = JSEvents.pointerlockChangeEvent;
        fillPointerlockChangeEventData(pointerlockChangeEvent);
  
        if (getWasmTableEntry(callbackfunc)(eventTypeId, pointerlockChangeEvent, userData)) e.preventDefault();
      };
  
      var eventHandler = {
        target,
        eventTypeString,
        callbackfunc,
        handlerFunc: pointerlockChangeEventHandlerFunc,
        useCapture
      };
      return JSEvents.registerOrRemoveHandler(eventHandler);
    }
  
  
  /** @suppress {missingProperties} */
  function _emscripten_set_pointerlockchange_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
      // TODO: Currently not supported in pthreads or in --proxy-to-worker mode. (In pthreads mode, document object is not defined)
      if (!document || !document.body || (!document.body.requestPointerLock && !document.body.mozRequestPointerLock && !document.body.webkitRequestPointerLock && !document.body.msRequestPointerLock)) {
        return -1;
      }
  
      target = findEventTarget(target);
      if (!target) return -4;
      registerPointerlockChangeEventCallback(target, userData, useCapture, callbackfunc, 20, "mozpointerlockchange", targetThread);
      registerPointerlockChangeEventCallback(target, userData, useCapture, callbackfunc, 20, "webkitpointerlockchange", targetThread);
      registerPointerlockChangeEventCallback(target, userData, useCapture, callbackfunc, 20, "mspointerlockchange", targetThread);
      return registerPointerlockChangeEventCallback(target, userData, useCapture, callbackfunc, 20, "pointerlockchange", targetThread);
    }

  
  
  
  function registerUiEventCallback(target, userData, useCapture, callbackfunc, eventTypeId, eventTypeString, targetThread) {
      if (!JSEvents.uiEvent) JSEvents.uiEvent = _malloc( 36 );
  
      target = findEventTarget(target);
  
      var uiEventHandlerFunc = function(e = event) {
        if (e.target != target) {
          // Never take ui events such as scroll via a 'bubbled' route, but always from the direct element that
          // was targeted. Otherwise e.g. if app logs a message in response to a page scroll, the Emscripten log
          // message box could cause to scroll, generating a new (bubbled) scroll message, causing a new log print,
          // causing a new scroll, etc..
          return;
        }
        var b = document.body; // Take document.body to a variable, Closure compiler does not outline access to it on its own.
        if (!b) {
          // During a page unload 'body' can be null, with "Cannot read property 'clientWidth' of null" being thrown
          return;
        }
        var uiEvent = JSEvents.uiEvent;
        HEAP32[((uiEvent)>>2)] = e.detail;
        HEAP32[(((uiEvent)+(4))>>2)] = b.clientWidth;
        HEAP32[(((uiEvent)+(8))>>2)] = b.clientHeight;
        HEAP32[(((uiEvent)+(12))>>2)] = innerWidth;
        HEAP32[(((uiEvent)+(16))>>2)] = innerHeight;
        HEAP32[(((uiEvent)+(20))>>2)] = outerWidth;
        HEAP32[(((uiEvent)+(24))>>2)] = outerHeight;
        HEAP32[(((uiEvent)+(28))>>2)] = pageXOffset;
        HEAP32[(((uiEvent)+(32))>>2)] = pageYOffset;
        if (getWasmTableEntry(callbackfunc)(eventTypeId, uiEvent, userData)) e.preventDefault();
      };
  
      var eventHandler = {
        target,
        eventTypeString,
        callbackfunc,
        handlerFunc: uiEventHandlerFunc,
        useCapture
      };
      return JSEvents.registerOrRemoveHandler(eventHandler);
    }
  function _emscripten_set_resize_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
      return registerUiEventCallback(target, userData, useCapture, callbackfunc, 10, "resize", targetThread);
    }

  
  
  
  
  function registerTouchEventCallback(target, userData, useCapture, callbackfunc, eventTypeId, eventTypeString, targetThread) {
      if (!JSEvents.touchEvent) JSEvents.touchEvent = _malloc( 1696 );
  
      target = findEventTarget(target);
  
      var touchEventHandlerFunc = function(e) {
        assert(e);
        var t, touches = {}, et = e.touches;
        // To ease marshalling different kinds of touches that browser reports (all touches are listed in e.touches, 
        // only changed touches in e.changedTouches, and touches on target at a.targetTouches), mark a boolean in
        // each Touch object so that we can later loop only once over all touches we see to marshall over to Wasm.
  
        for (var i = 0; i < et.length; ++i) {
          t = et[i];
          // Browser might recycle the generated Touch objects between each frame (Firefox on Android), so reset any
          // changed/target states we may have set from previous frame.
          t.isChanged = t.onTarget = 0;
          touches[t.identifier] = t;
        }
        // Mark which touches are part of the changedTouches list.
        for (var i = 0; i < e.changedTouches.length; ++i) {
          t = e.changedTouches[i];
          t.isChanged = 1;
          touches[t.identifier] = t;
        }
        // Mark which touches are part of the targetTouches list.
        for (var i = 0; i < e.targetTouches.length; ++i) {
          touches[e.targetTouches[i].identifier].onTarget = 1;
        }
  
        var touchEvent = JSEvents.touchEvent;
        HEAPF64[((touchEvent)>>3)] = e.timeStamp;
        var idx = touchEvent>>2; // Pre-shift the ptr to index to HEAP32 to save code size
        HEAP32[idx + 3] = e.ctrlKey;
        HEAP32[idx + 4] = e.shiftKey;
        HEAP32[idx + 5] = e.altKey;
        HEAP32[idx + 6] = e.metaKey;
        idx += 7; // Advance to the start of the touch array.
        var targetRect = getBoundingClientRect(target);
        var numTouches = 0;
        for (var i in touches) {
          t = touches[i];
          HEAP32[idx + 0] = t.identifier;
          HEAP32[idx + 1] = t.screenX;
          HEAP32[idx + 2] = t.screenY;
          HEAP32[idx + 3] = t.clientX;
          HEAP32[idx + 4] = t.clientY;
          HEAP32[idx + 5] = t.pageX;
          HEAP32[idx + 6] = t.pageY;
          HEAP32[idx + 7] = t.isChanged;
          HEAP32[idx + 8] = t.onTarget;
          HEAP32[idx + 9] = t.clientX - targetRect.left;
          HEAP32[idx + 10] = t.clientY - targetRect.top;
  
          idx += 13;
  
          if (++numTouches > 31) {
            break;
          }
        }
        HEAP32[(((touchEvent)+(8))>>2)] = numTouches;
  
        if (getWasmTableEntry(callbackfunc)(eventTypeId, touchEvent, userData)) e.preventDefault();
      };
  
      var eventHandler = {
        target,
        allowsDeferredCalls: eventTypeString == 'touchstart' || eventTypeString == 'touchend',
        eventTypeString,
        callbackfunc,
        handlerFunc: touchEventHandlerFunc,
        useCapture
      };
      return JSEvents.registerOrRemoveHandler(eventHandler);
    }
  function _emscripten_set_touchcancel_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
      return registerTouchEventCallback(target, userData, useCapture, callbackfunc, 25, "touchcancel", targetThread);
    }

  function _emscripten_set_touchend_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
      return registerTouchEventCallback(target, userData, useCapture, callbackfunc, 23, "touchend", targetThread);
    }

  function _emscripten_set_touchmove_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
      return registerTouchEventCallback(target, userData, useCapture, callbackfunc, 24, "touchmove", targetThread);
    }

  function _emscripten_set_touchstart_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
      return registerTouchEventCallback(target, userData, useCapture, callbackfunc, 22, "touchstart", targetThread);
    }

  
  function fillVisibilityChangeEventData(eventStruct) {
      var visibilityStates = [ "hidden", "visible", "prerender", "unloaded" ];
      var visibilityState = visibilityStates.indexOf(document.visibilityState);
  
      // Assigning a boolean to HEAP32 with expected type coercion.
      /** @suppress{checkTypes} */
      HEAP32[((eventStruct)>>2)] = document.hidden;
      HEAP32[(((eventStruct)+(4))>>2)] = visibilityState;
    }
  
  
  
  function registerVisibilityChangeEventCallback(target, userData, useCapture, callbackfunc, eventTypeId, eventTypeString, targetThread) {
      if (!JSEvents.visibilityChangeEvent) JSEvents.visibilityChangeEvent = _malloc( 8 );
  
      var visibilityChangeEventHandlerFunc = function(e = event) {
        var visibilityChangeEvent = JSEvents.visibilityChangeEvent;
  
        fillVisibilityChangeEventData(visibilityChangeEvent);
  
        if (getWasmTableEntry(callbackfunc)(eventTypeId, visibilityChangeEvent, userData)) e.preventDefault();
      };
  
      var eventHandler = {
        target,
        eventTypeString,
        callbackfunc,
        handlerFunc: visibilityChangeEventHandlerFunc,
        useCapture
      };
      return JSEvents.registerOrRemoveHandler(eventHandler);
    }
  
  function _emscripten_set_visibilitychange_callback_on_thread(userData, useCapture, callbackfunc, targetThread) {
    if (!specialHTMLTargets[1]) {
      return -4;
    }
      return registerVisibilityChangeEventCallback(specialHTMLTargets[1], userData, useCapture, callbackfunc, 21, "visibilitychange", targetThread);
    }

  
  
  
  
  
  function registerWheelEventCallback(target, userData, useCapture, callbackfunc, eventTypeId, eventTypeString, targetThread) {
      if (!JSEvents.wheelEvent) JSEvents.wheelEvent = _malloc( 104 );
  
      // The DOM Level 3 events spec event 'wheel'
      var wheelHandlerFunc = function(e = event) {
        var wheelEvent = JSEvents.wheelEvent;
        fillMouseEventData(wheelEvent, e, target);
        HEAPF64[(((wheelEvent)+(72))>>3)] = e["deltaX"];
        HEAPF64[(((wheelEvent)+(80))>>3)] = e["deltaY"];
        HEAPF64[(((wheelEvent)+(88))>>3)] = e["deltaZ"];
        HEAP32[(((wheelEvent)+(96))>>2)] = e["deltaMode"];
        if (getWasmTableEntry(callbackfunc)(eventTypeId, wheelEvent, userData)) e.preventDefault();
      };
  
      var eventHandler = {
        target,
        allowsDeferredCalls: true,
        eventTypeString,
        callbackfunc,
        handlerFunc: wheelHandlerFunc,
        useCapture
      };
      return JSEvents.registerOrRemoveHandler(eventHandler);
    }
  
  function _emscripten_set_wheel_callback_on_thread(target, userData, useCapture, callbackfunc, targetThread) {
      target = findEventTarget(target);
      if (!target) return -4;
      if (typeof target.onwheel != 'undefined') {
        return registerWheelEventCallback(target, userData, useCapture, callbackfunc, 9, "wheel", targetThread);
      } else {
        return -1;
      }
    }

  
  function _emscripten_set_window_title(title) {
      setWindowTitle(UTF8ToString(title));
    }

  function _emscripten_sleep() {
      throw 'Please compile your program with async support in order to use asynchronous operations like emscripten_sleep';
    }

  var ENV = {};
  
  var getExecutableName = () => {
      return thisProgram || './this.program';
    };
  var getEnvStrings = () => {
      if (!getEnvStrings.strings) {
        // Default values.
        // Browser language detection #8751
        var lang = ((typeof navigator == 'object' && navigator.languages && navigator.languages[0]) || 'C').replace('-', '_') + '.UTF-8';
        var env = {
          'USER': 'web_user',
          'LOGNAME': 'web_user',
          'PATH': '/',
          'PWD': '/',
          'HOME': '/home/web_user',
          'LANG': lang,
          '_': getExecutableName()
        };
        // Apply the user-provided values, if any.
        for (var x in ENV) {
          // x is a key in ENV; if ENV[x] is undefined, that means it was
          // explicitly set to be so. We allow user code to do that to
          // force variables with default values to remain unset.
          if (ENV[x] === undefined) delete env[x];
          else env[x] = ENV[x];
        }
        var strings = [];
        for (var x in env) {
          strings.push(`${x}=${env[x]}`);
        }
        getEnvStrings.strings = strings;
      }
      return getEnvStrings.strings;
    };
  
  var stringToAscii = (str, buffer) => {
      for (var i = 0; i < str.length; ++i) {
        assert(str.charCodeAt(i) === (str.charCodeAt(i) & 0xff));
        HEAP8[((buffer++)>>0)] = str.charCodeAt(i);
      }
      // Null-terminate the string
      HEAP8[((buffer)>>0)] = 0;
    };
  
  var _environ_get = (__environ, environ_buf) => {
      var bufSize = 0;
      getEnvStrings().forEach(function(string, i) {
        var ptr = environ_buf + bufSize;
        HEAPU32[(((__environ)+(i*4))>>2)] = ptr;
        stringToAscii(string, ptr);
        bufSize += string.length + 1;
      });
      return 0;
    };

  
  var _environ_sizes_get = (penviron_count, penviron_buf_size) => {
      var strings = getEnvStrings();
      HEAPU32[((penviron_count)>>2)] = strings.length;
      var bufSize = 0;
      strings.forEach(function(string) {
        bufSize += string.length + 1;
      });
      HEAPU32[((penviron_buf_size)>>2)] = bufSize;
      return 0;
    };

  function _fd_close(fd) {
  try {
  
      var stream = SYSCALLS.getStreamFromFD(fd);
      FS.close(stream);
      return 0;
    } catch (e) {
    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
    return e.errno;
  }
  }

  /** @param {number=} offset */
  var doReadv = (stream, iov, iovcnt, offset) => {
      var ret = 0;
      for (var i = 0; i < iovcnt; i++) {
        var ptr = HEAPU32[((iov)>>2)];
        var len = HEAPU32[(((iov)+(4))>>2)];
        iov += 8;
        var curr = FS.read(stream, HEAP8,ptr, len, offset);
        if (curr < 0) return -1;
        ret += curr;
        if (curr < len) break; // nothing more to read
        if (typeof offset !== 'undefined') {
          offset += curr;
        }
      }
      return ret;
    };
  
  function _fd_read(fd, iov, iovcnt, pnum) {
  try {
  
      var stream = SYSCALLS.getStreamFromFD(fd);
      var num = doReadv(stream, iov, iovcnt);
      HEAPU32[((pnum)>>2)] = num;
      return 0;
    } catch (e) {
    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
    return e.errno;
  }
  }

  function convertI32PairToI53Checked(lo, hi) {
      assert(lo == (lo >>> 0) || lo == (lo|0)); // lo should either be a i32 or a u32
      assert(hi === (hi|0));                    // hi should be a i32
      return ((hi + 0x200000) >>> 0 < 0x400001 - !!lo) ? (lo >>> 0) + hi * 4294967296 : NaN;
    }
  
  
  
  
  
  function _fd_seek(fd, offset_low, offset_high, whence, newOffset) {
  try {
  
      var offset = convertI32PairToI53Checked(offset_low, offset_high); if (isNaN(offset)) return 61;
      var stream = SYSCALLS.getStreamFromFD(fd);
      FS.llseek(stream, offset, whence);
      (tempI64 = [stream.position>>>0,(tempDouble=stream.position,(+(Math.abs(tempDouble))) >= 1.0 ? (tempDouble > 0.0 ? (+(Math.floor((tempDouble)/4294967296.0)))>>>0 : (~~((+(Math.ceil((tempDouble - +(((~~(tempDouble)))>>>0))/4294967296.0)))))>>>0) : 0)], HEAP32[((newOffset)>>2)] = tempI64[0],HEAP32[(((newOffset)+(4))>>2)] = tempI64[1]);
      if (stream.getdents && offset === 0 && whence === 0) stream.getdents = null; // reset readdir state
      return 0;
    } catch (e) {
    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
    return e.errno;
  }
  }

  /** @param {number=} offset */
  var doWritev = (stream, iov, iovcnt, offset) => {
      var ret = 0;
      for (var i = 0; i < iovcnt; i++) {
        var ptr = HEAPU32[((iov)>>2)];
        var len = HEAPU32[(((iov)+(4))>>2)];
        iov += 8;
        var curr = FS.write(stream, HEAP8,ptr, len, offset);
        if (curr < 0) return -1;
        ret += curr;
        if (typeof offset !== 'undefined') {
          offset += curr;
        }
      }
      return ret;
    };
  
  function _fd_write(fd, iov, iovcnt, pnum) {
  try {
  
      var stream = SYSCALLS.getStreamFromFD(fd);
      var num = doWritev(stream, iov, iovcnt);
      HEAPU32[((pnum)>>2)] = num;
      return 0;
    } catch (e) {
    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
    return e.errno;
  }
  }



  var FSNode = /** @constructor */ function(parent, name, mode, rdev) {
    if (!parent) {
      parent = this;  // root node sets parent to itself
    }
    this.parent = parent;
    this.mount = parent.mount;
    this.mounted = null;
    this.id = FS.nextInode++;
    this.name = name;
    this.mode = mode;
    this.node_ops = {};
    this.stream_ops = {};
    this.rdev = rdev;
  };
  var readMode = 292/*292*/ | 73/*73*/;
  var writeMode = 146/*146*/;
  Object.defineProperties(FSNode.prototype, {
   read: {
    get: /** @this{FSNode} */function() {
     return (this.mode & readMode) === readMode;
    },
    set: /** @this{FSNode} */function(val) {
     val ? this.mode |= readMode : this.mode &= ~readMode;
    }
   },
   write: {
    get: /** @this{FSNode} */function() {
     return (this.mode & writeMode) === writeMode;
    },
    set: /** @this{FSNode} */function(val) {
     val ? this.mode |= writeMode : this.mode &= ~writeMode;
    }
   },
   isFolder: {
    get: /** @this{FSNode} */function() {
     return FS.isDir(this.mode);
    }
   },
   isDevice: {
    get: /** @this{FSNode} */function() {
     return FS.isChrdev(this.mode);
    }
   }
  });
  FS.FSNode = FSNode;
  FS.createPreloadedFile = FS_createPreloadedFile;
  FS.staticInit();;
ERRNO_CODES = {
      'EPERM': 63,
      'ENOENT': 44,
      'ESRCH': 71,
      'EINTR': 27,
      'EIO': 29,
      'ENXIO': 60,
      'E2BIG': 1,
      'ENOEXEC': 45,
      'EBADF': 8,
      'ECHILD': 12,
      'EAGAIN': 6,
      'EWOULDBLOCK': 6,
      'ENOMEM': 48,
      'EACCES': 2,
      'EFAULT': 21,
      'ENOTBLK': 105,
      'EBUSY': 10,
      'EEXIST': 20,
      'EXDEV': 75,
      'ENODEV': 43,
      'ENOTDIR': 54,
      'EISDIR': 31,
      'EINVAL': 28,
      'ENFILE': 41,
      'EMFILE': 33,
      'ENOTTY': 59,
      'ETXTBSY': 74,
      'EFBIG': 22,
      'ENOSPC': 51,
      'ESPIPE': 70,
      'EROFS': 69,
      'EMLINK': 34,
      'EPIPE': 64,
      'EDOM': 18,
      'ERANGE': 68,
      'ENOMSG': 49,
      'EIDRM': 24,
      'ECHRNG': 106,
      'EL2NSYNC': 156,
      'EL3HLT': 107,
      'EL3RST': 108,
      'ELNRNG': 109,
      'EUNATCH': 110,
      'ENOCSI': 111,
      'EL2HLT': 112,
      'EDEADLK': 16,
      'ENOLCK': 46,
      'EBADE': 113,
      'EBADR': 114,
      'EXFULL': 115,
      'ENOANO': 104,
      'EBADRQC': 103,
      'EBADSLT': 102,
      'EDEADLOCK': 16,
      'EBFONT': 101,
      'ENOSTR': 100,
      'ENODATA': 116,
      'ETIME': 117,
      'ENOSR': 118,
      'ENONET': 119,
      'ENOPKG': 120,
      'EREMOTE': 121,
      'ENOLINK': 47,
      'EADV': 122,
      'ESRMNT': 123,
      'ECOMM': 124,
      'EPROTO': 65,
      'EMULTIHOP': 36,
      'EDOTDOT': 125,
      'EBADMSG': 9,
      'ENOTUNIQ': 126,
      'EBADFD': 127,
      'EREMCHG': 128,
      'ELIBACC': 129,
      'ELIBBAD': 130,
      'ELIBSCN': 131,
      'ELIBMAX': 132,
      'ELIBEXEC': 133,
      'ENOSYS': 52,
      'ENOTEMPTY': 55,
      'ENAMETOOLONG': 37,
      'ELOOP': 32,
      'EOPNOTSUPP': 138,
      'EPFNOSUPPORT': 139,
      'ECONNRESET': 15,
      'ENOBUFS': 42,
      'EAFNOSUPPORT': 5,
      'EPROTOTYPE': 67,
      'ENOTSOCK': 57,
      'ENOPROTOOPT': 50,
      'ESHUTDOWN': 140,
      'ECONNREFUSED': 14,
      'EADDRINUSE': 3,
      'ECONNABORTED': 13,
      'ENETUNREACH': 40,
      'ENETDOWN': 38,
      'ETIMEDOUT': 73,
      'EHOSTDOWN': 142,
      'EHOSTUNREACH': 23,
      'EINPROGRESS': 26,
      'EALREADY': 7,
      'EDESTADDRREQ': 17,
      'EMSGSIZE': 35,
      'EPROTONOSUPPORT': 66,
      'ESOCKTNOSUPPORT': 137,
      'EADDRNOTAVAIL': 4,
      'ENETRESET': 39,
      'EISCONN': 30,
      'ENOTCONN': 53,
      'ETOOMANYREFS': 141,
      'EUSERS': 136,
      'EDQUOT': 19,
      'ESTALE': 72,
      'ENOTSUP': 138,
      'ENOMEDIUM': 148,
      'EILSEQ': 25,
      'EOVERFLOW': 61,
      'ECANCELED': 11,
      'ENOTRECOVERABLE': 56,
      'EOWNERDEAD': 62,
      'ESTRPIPE': 135,
    };;

      // exports
      Module["requestFullscreen"] = function Module_requestFullscreen(lockPointer, resizeCanvas) { Browser.requestFullscreen(lockPointer, resizeCanvas) };
      Module["requestFullScreen"] = function Module_requestFullScreen() { Browser.requestFullScreen() };
      Module["requestAnimationFrame"] = function Module_requestAnimationFrame(func) { Browser.requestAnimationFrame(func) };
      Module["setCanvasSize"] = function Module_setCanvasSize(width, height, noUpdates) { Browser.setCanvasSize(width, height, noUpdates) };
      Module["pauseMainLoop"] = function Module_pauseMainLoop() { Browser.mainLoop.pause() };
      Module["resumeMainLoop"] = function Module_resumeMainLoop() { Browser.mainLoop.resume() };
      Module["getUserMedia"] = function Module_getUserMedia() { Browser.getUserMedia() };
      Module["createContext"] = function Module_createContext(canvas, useWebGL, setInModule, webGLContextAttributes) { return Browser.createContext(canvas, useWebGL, setInModule, webGLContextAttributes) };
      var preloadedImages = {};
      var preloadedAudios = {};;
var GLctx;;
for (var i = 0; i < 32; ++i) tempFixedLengthArray.push(new Array(i));;
var miniTempWebGLFloatBuffersStorage = new Float32Array(288);
  for (/**@suppress{duplicate}*/var i = 0; i < 288; ++i) {
  miniTempWebGLFloatBuffers[i] = miniTempWebGLFloatBuffersStorage.subarray(0, i+1);
  }
  ;
var miniTempWebGLIntBuffersStorage = new Int32Array(288);
  for (/**@suppress{duplicate}*/var i = 0; i < 288; ++i) {
  miniTempWebGLIntBuffers[i] = miniTempWebGLIntBuffersStorage.subarray(0, i+1);
  }
  ;
function checkIncomingModuleAPI() {
  ignoredModuleProp('fetchSettings');
}
var wasmImports = {
  "__syscall_fcntl64": ___syscall_fcntl64,
  "__syscall_ioctl": ___syscall_ioctl,
  "__syscall_openat": ___syscall_openat,
  "_emscripten_get_now_is_monotonic": __emscripten_get_now_is_monotonic,
  "eglBindAPI": _eglBindAPI,
  "eglChooseConfig": _eglChooseConfig,
  "eglCreateContext": _eglCreateContext,
  "eglCreateWindowSurface": _eglCreateWindowSurface,
  "eglDestroyContext": _eglDestroyContext,
  "eglDestroySurface": _eglDestroySurface,
  "eglGetConfigAttrib": _eglGetConfigAttrib,
  "eglGetDisplay": _eglGetDisplay,
  "eglGetError": _eglGetError,
  "eglInitialize": _eglInitialize,
  "eglMakeCurrent": _eglMakeCurrent,
  "eglQueryString": _eglQueryString,
  "eglSwapBuffers": _eglSwapBuffers,
  "eglSwapInterval": _eglSwapInterval,
  "eglTerminate": _eglTerminate,
  "eglWaitGL": _eglWaitGL,
  "eglWaitNative": _eglWaitNative,
  "emscripten_asm_const_int": _emscripten_asm_const_int,
  "emscripten_asm_const_int_sync_on_main_thread": _emscripten_asm_const_int_sync_on_main_thread,
  "emscripten_date_now": _emscripten_date_now,
  "emscripten_exit_fullscreen": _emscripten_exit_fullscreen,
  "emscripten_exit_pointerlock": _emscripten_exit_pointerlock,
  "emscripten_get_device_pixel_ratio": _emscripten_get_device_pixel_ratio,
  "emscripten_get_element_css_size": _emscripten_get_element_css_size,
  "emscripten_get_gamepad_status": _emscripten_get_gamepad_status,
  "emscripten_get_now": _emscripten_get_now,
  "emscripten_get_num_gamepads": _emscripten_get_num_gamepads,
  "emscripten_get_screen_size": _emscripten_get_screen_size,
  "emscripten_glActiveTexture": _emscripten_glActiveTexture,
  "emscripten_glAttachShader": _emscripten_glAttachShader,
  "emscripten_glBeginQueryEXT": _emscripten_glBeginQueryEXT,
  "emscripten_glBindAttribLocation": _emscripten_glBindAttribLocation,
  "emscripten_glBindBuffer": _emscripten_glBindBuffer,
  "emscripten_glBindFramebuffer": _emscripten_glBindFramebuffer,
  "emscripten_glBindRenderbuffer": _emscripten_glBindRenderbuffer,
  "emscripten_glBindTexture": _emscripten_glBindTexture,
  "emscripten_glBindVertexArrayOES": _emscripten_glBindVertexArrayOES,
  "emscripten_glBlendColor": _emscripten_glBlendColor,
  "emscripten_glBlendEquation": _emscripten_glBlendEquation,
  "emscripten_glBlendEquationSeparate": _emscripten_glBlendEquationSeparate,
  "emscripten_glBlendFunc": _emscripten_glBlendFunc,
  "emscripten_glBlendFuncSeparate": _emscripten_glBlendFuncSeparate,
  "emscripten_glBufferData": _emscripten_glBufferData,
  "emscripten_glBufferSubData": _emscripten_glBufferSubData,
  "emscripten_glCheckFramebufferStatus": _emscripten_glCheckFramebufferStatus,
  "emscripten_glClear": _emscripten_glClear,
  "emscripten_glClearColor": _emscripten_glClearColor,
  "emscripten_glClearDepthf": _emscripten_glClearDepthf,
  "emscripten_glClearStencil": _emscripten_glClearStencil,
  "emscripten_glColorMask": _emscripten_glColorMask,
  "emscripten_glCompileShader": _emscripten_glCompileShader,
  "emscripten_glCompressedTexImage2D": _emscripten_glCompressedTexImage2D,
  "emscripten_glCompressedTexSubImage2D": _emscripten_glCompressedTexSubImage2D,
  "emscripten_glCopyTexImage2D": _emscripten_glCopyTexImage2D,
  "emscripten_glCopyTexSubImage2D": _emscripten_glCopyTexSubImage2D,
  "emscripten_glCreateProgram": _emscripten_glCreateProgram,
  "emscripten_glCreateShader": _emscripten_glCreateShader,
  "emscripten_glCullFace": _emscripten_glCullFace,
  "emscripten_glDeleteBuffers": _emscripten_glDeleteBuffers,
  "emscripten_glDeleteFramebuffers": _emscripten_glDeleteFramebuffers,
  "emscripten_glDeleteProgram": _emscripten_glDeleteProgram,
  "emscripten_glDeleteQueriesEXT": _emscripten_glDeleteQueriesEXT,
  "emscripten_glDeleteRenderbuffers": _emscripten_glDeleteRenderbuffers,
  "emscripten_glDeleteShader": _emscripten_glDeleteShader,
  "emscripten_glDeleteTextures": _emscripten_glDeleteTextures,
  "emscripten_glDeleteVertexArraysOES": _emscripten_glDeleteVertexArraysOES,
  "emscripten_glDepthFunc": _emscripten_glDepthFunc,
  "emscripten_glDepthMask": _emscripten_glDepthMask,
  "emscripten_glDepthRangef": _emscripten_glDepthRangef,
  "emscripten_glDetachShader": _emscripten_glDetachShader,
  "emscripten_glDisable": _emscripten_glDisable,
  "emscripten_glDisableVertexAttribArray": _emscripten_glDisableVertexAttribArray,
  "emscripten_glDrawArrays": _emscripten_glDrawArrays,
  "emscripten_glDrawArraysInstancedANGLE": _emscripten_glDrawArraysInstancedANGLE,
  "emscripten_glDrawBuffersWEBGL": _emscripten_glDrawBuffersWEBGL,
  "emscripten_glDrawElements": _emscripten_glDrawElements,
  "emscripten_glDrawElementsInstancedANGLE": _emscripten_glDrawElementsInstancedANGLE,
  "emscripten_glEnable": _emscripten_glEnable,
  "emscripten_glEnableVertexAttribArray": _emscripten_glEnableVertexAttribArray,
  "emscripten_glEndQueryEXT": _emscripten_glEndQueryEXT,
  "emscripten_glFinish": _emscripten_glFinish,
  "emscripten_glFlush": _emscripten_glFlush,
  "emscripten_glFramebufferRenderbuffer": _emscripten_glFramebufferRenderbuffer,
  "emscripten_glFramebufferTexture2D": _emscripten_glFramebufferTexture2D,
  "emscripten_glFrontFace": _emscripten_glFrontFace,
  "emscripten_glGenBuffers": _emscripten_glGenBuffers,
  "emscripten_glGenFramebuffers": _emscripten_glGenFramebuffers,
  "emscripten_glGenQueriesEXT": _emscripten_glGenQueriesEXT,
  "emscripten_glGenRenderbuffers": _emscripten_glGenRenderbuffers,
  "emscripten_glGenTextures": _emscripten_glGenTextures,
  "emscripten_glGenVertexArraysOES": _emscripten_glGenVertexArraysOES,
  "emscripten_glGenerateMipmap": _emscripten_glGenerateMipmap,
  "emscripten_glGetActiveAttrib": _emscripten_glGetActiveAttrib,
  "emscripten_glGetActiveUniform": _emscripten_glGetActiveUniform,
  "emscripten_glGetAttachedShaders": _emscripten_glGetAttachedShaders,
  "emscripten_glGetAttribLocation": _emscripten_glGetAttribLocation,
  "emscripten_glGetBooleanv": _emscripten_glGetBooleanv,
  "emscripten_glGetBufferParameteriv": _emscripten_glGetBufferParameteriv,
  "emscripten_glGetError": _emscripten_glGetError,
  "emscripten_glGetFloatv": _emscripten_glGetFloatv,
  "emscripten_glGetFramebufferAttachmentParameteriv": _emscripten_glGetFramebufferAttachmentParameteriv,
  "emscripten_glGetIntegerv": _emscripten_glGetIntegerv,
  "emscripten_glGetProgramInfoLog": _emscripten_glGetProgramInfoLog,
  "emscripten_glGetProgramiv": _emscripten_glGetProgramiv,
  "emscripten_glGetQueryObjecti64vEXT": _emscripten_glGetQueryObjecti64vEXT,
  "emscripten_glGetQueryObjectivEXT": _emscripten_glGetQueryObjectivEXT,
  "emscripten_glGetQueryObjectui64vEXT": _emscripten_glGetQueryObjectui64vEXT,
  "emscripten_glGetQueryObjectuivEXT": _emscripten_glGetQueryObjectuivEXT,
  "emscripten_glGetQueryivEXT": _emscripten_glGetQueryivEXT,
  "emscripten_glGetRenderbufferParameteriv": _emscripten_glGetRenderbufferParameteriv,
  "emscripten_glGetShaderInfoLog": _emscripten_glGetShaderInfoLog,
  "emscripten_glGetShaderPrecisionFormat": _emscripten_glGetShaderPrecisionFormat,
  "emscripten_glGetShaderSource": _emscripten_glGetShaderSource,
  "emscripten_glGetShaderiv": _emscripten_glGetShaderiv,
  "emscripten_glGetString": _emscripten_glGetString,
  "emscripten_glGetTexParameterfv": _emscripten_glGetTexParameterfv,
  "emscripten_glGetTexParameteriv": _emscripten_glGetTexParameteriv,
  "emscripten_glGetUniformLocation": _emscripten_glGetUniformLocation,
  "emscripten_glGetUniformfv": _emscripten_glGetUniformfv,
  "emscripten_glGetUniformiv": _emscripten_glGetUniformiv,
  "emscripten_glGetVertexAttribPointerv": _emscripten_glGetVertexAttribPointerv,
  "emscripten_glGetVertexAttribfv": _emscripten_glGetVertexAttribfv,
  "emscripten_glGetVertexAttribiv": _emscripten_glGetVertexAttribiv,
  "emscripten_glHint": _emscripten_glHint,
  "emscripten_glIsBuffer": _emscripten_glIsBuffer,
  "emscripten_glIsEnabled": _emscripten_glIsEnabled,
  "emscripten_glIsFramebuffer": _emscripten_glIsFramebuffer,
  "emscripten_glIsProgram": _emscripten_glIsProgram,
  "emscripten_glIsQueryEXT": _emscripten_glIsQueryEXT,
  "emscripten_glIsRenderbuffer": _emscripten_glIsRenderbuffer,
  "emscripten_glIsShader": _emscripten_glIsShader,
  "emscripten_glIsTexture": _emscripten_glIsTexture,
  "emscripten_glIsVertexArrayOES": _emscripten_glIsVertexArrayOES,
  "emscripten_glLineWidth": _emscripten_glLineWidth,
  "emscripten_glLinkProgram": _emscripten_glLinkProgram,
  "emscripten_glPixelStorei": _emscripten_glPixelStorei,
  "emscripten_glPolygonOffset": _emscripten_glPolygonOffset,
  "emscripten_glQueryCounterEXT": _emscripten_glQueryCounterEXT,
  "emscripten_glReadPixels": _emscripten_glReadPixels,
  "emscripten_glReleaseShaderCompiler": _emscripten_glReleaseShaderCompiler,
  "emscripten_glRenderbufferStorage": _emscripten_glRenderbufferStorage,
  "emscripten_glSampleCoverage": _emscripten_glSampleCoverage,
  "emscripten_glScissor": _emscripten_glScissor,
  "emscripten_glShaderBinary": _emscripten_glShaderBinary,
  "emscripten_glShaderSource": _emscripten_glShaderSource,
  "emscripten_glStencilFunc": _emscripten_glStencilFunc,
  "emscripten_glStencilFuncSeparate": _emscripten_glStencilFuncSeparate,
  "emscripten_glStencilMask": _emscripten_glStencilMask,
  "emscripten_glStencilMaskSeparate": _emscripten_glStencilMaskSeparate,
  "emscripten_glStencilOp": _emscripten_glStencilOp,
  "emscripten_glStencilOpSeparate": _emscripten_glStencilOpSeparate,
  "emscripten_glTexImage2D": _emscripten_glTexImage2D,
  "emscripten_glTexParameterf": _emscripten_glTexParameterf,
  "emscripten_glTexParameterfv": _emscripten_glTexParameterfv,
  "emscripten_glTexParameteri": _emscripten_glTexParameteri,
  "emscripten_glTexParameteriv": _emscripten_glTexParameteriv,
  "emscripten_glTexSubImage2D": _emscripten_glTexSubImage2D,
  "emscripten_glUniform1f": _emscripten_glUniform1f,
  "emscripten_glUniform1fv": _emscripten_glUniform1fv,
  "emscripten_glUniform1i": _emscripten_glUniform1i,
  "emscripten_glUniform1iv": _emscripten_glUniform1iv,
  "emscripten_glUniform2f": _emscripten_glUniform2f,
  "emscripten_glUniform2fv": _emscripten_glUniform2fv,
  "emscripten_glUniform2i": _emscripten_glUniform2i,
  "emscripten_glUniform2iv": _emscripten_glUniform2iv,
  "emscripten_glUniform3f": _emscripten_glUniform3f,
  "emscripten_glUniform3fv": _emscripten_glUniform3fv,
  "emscripten_glUniform3i": _emscripten_glUniform3i,
  "emscripten_glUniform3iv": _emscripten_glUniform3iv,
  "emscripten_glUniform4f": _emscripten_glUniform4f,
  "emscripten_glUniform4fv": _emscripten_glUniform4fv,
  "emscripten_glUniform4i": _emscripten_glUniform4i,
  "emscripten_glUniform4iv": _emscripten_glUniform4iv,
  "emscripten_glUniformMatrix2fv": _emscripten_glUniformMatrix2fv,
  "emscripten_glUniformMatrix3fv": _emscripten_glUniformMatrix3fv,
  "emscripten_glUniformMatrix4fv": _emscripten_glUniformMatrix4fv,
  "emscripten_glUseProgram": _emscripten_glUseProgram,
  "emscripten_glValidateProgram": _emscripten_glValidateProgram,
  "emscripten_glVertexAttrib1f": _emscripten_glVertexAttrib1f,
  "emscripten_glVertexAttrib1fv": _emscripten_glVertexAttrib1fv,
  "emscripten_glVertexAttrib2f": _emscripten_glVertexAttrib2f,
  "emscripten_glVertexAttrib2fv": _emscripten_glVertexAttrib2fv,
  "emscripten_glVertexAttrib3f": _emscripten_glVertexAttrib3f,
  "emscripten_glVertexAttrib3fv": _emscripten_glVertexAttrib3fv,
  "emscripten_glVertexAttrib4f": _emscripten_glVertexAttrib4f,
  "emscripten_glVertexAttrib4fv": _emscripten_glVertexAttrib4fv,
  "emscripten_glVertexAttribDivisorANGLE": _emscripten_glVertexAttribDivisorANGLE,
  "emscripten_glVertexAttribPointer": _emscripten_glVertexAttribPointer,
  "emscripten_glViewport": _emscripten_glViewport,
  "emscripten_has_asyncify": _emscripten_has_asyncify,
  "emscripten_memcpy_big": _emscripten_memcpy_big,
  "emscripten_request_fullscreen_strategy": _emscripten_request_fullscreen_strategy,
  "emscripten_request_pointerlock": _emscripten_request_pointerlock,
  "emscripten_resize_heap": _emscripten_resize_heap,
  "emscripten_sample_gamepad_data": _emscripten_sample_gamepad_data,
  "emscripten_set_beforeunload_callback_on_thread": _emscripten_set_beforeunload_callback_on_thread,
  "emscripten_set_blur_callback_on_thread": _emscripten_set_blur_callback_on_thread,
  "emscripten_set_canvas_element_size": _emscripten_set_canvas_element_size,
  "emscripten_set_element_css_size": _emscripten_set_element_css_size,
  "emscripten_set_focus_callback_on_thread": _emscripten_set_focus_callback_on_thread,
  "emscripten_set_fullscreenchange_callback_on_thread": _emscripten_set_fullscreenchange_callback_on_thread,
  "emscripten_set_gamepadconnected_callback_on_thread": _emscripten_set_gamepadconnected_callback_on_thread,
  "emscripten_set_gamepaddisconnected_callback_on_thread": _emscripten_set_gamepaddisconnected_callback_on_thread,
  "emscripten_set_keydown_callback_on_thread": _emscripten_set_keydown_callback_on_thread,
  "emscripten_set_keypress_callback_on_thread": _emscripten_set_keypress_callback_on_thread,
  "emscripten_set_keyup_callback_on_thread": _emscripten_set_keyup_callback_on_thread,
  "emscripten_set_mousedown_callback_on_thread": _emscripten_set_mousedown_callback_on_thread,
  "emscripten_set_mouseenter_callback_on_thread": _emscripten_set_mouseenter_callback_on_thread,
  "emscripten_set_mouseleave_callback_on_thread": _emscripten_set_mouseleave_callback_on_thread,
  "emscripten_set_mousemove_callback_on_thread": _emscripten_set_mousemove_callback_on_thread,
  "emscripten_set_mouseup_callback_on_thread": _emscripten_set_mouseup_callback_on_thread,
  "emscripten_set_pointerlockchange_callback_on_thread": _emscripten_set_pointerlockchange_callback_on_thread,
  "emscripten_set_resize_callback_on_thread": _emscripten_set_resize_callback_on_thread,
  "emscripten_set_touchcancel_callback_on_thread": _emscripten_set_touchcancel_callback_on_thread,
  "emscripten_set_touchend_callback_on_thread": _emscripten_set_touchend_callback_on_thread,
  "emscripten_set_touchmove_callback_on_thread": _emscripten_set_touchmove_callback_on_thread,
  "emscripten_set_touchstart_callback_on_thread": _emscripten_set_touchstart_callback_on_thread,
  "emscripten_set_visibilitychange_callback_on_thread": _emscripten_set_visibilitychange_callback_on_thread,
  "emscripten_set_wheel_callback_on_thread": _emscripten_set_wheel_callback_on_thread,
  "emscripten_set_window_title": _emscripten_set_window_title,
  "emscripten_sleep": _emscripten_sleep,
  "environ_get": _environ_get,
  "environ_sizes_get": _environ_sizes_get,
  "fd_close": _fd_close,
  "fd_read": _fd_read,
  "fd_seek": _fd_seek,
  "fd_write": _fd_write
};
var asm = createWasm();
/** @type {function(...*):?} */
var ___wasm_call_ctors = createExportWrapper("__wasm_call_ctors");
/** @type {function(...*):?} */
var _main = Module["_main"] = createExportWrapper("main");
/** @type {function(...*):?} */
var _malloc = createExportWrapper("malloc");
/** @type {function(...*):?} */
var ___errno_location = createExportWrapper("__errno_location");
/** @type {function(...*):?} */
var _fflush = Module["_fflush"] = createExportWrapper("fflush");
/** @type {function(...*):?} */
var _emscripten_stack_init = function() {
  return (_emscripten_stack_init = Module["asm"]["emscripten_stack_init"]).apply(null, arguments);
};

/** @type {function(...*):?} */
var _emscripten_stack_get_free = function() {
  return (_emscripten_stack_get_free = Module["asm"]["emscripten_stack_get_free"]).apply(null, arguments);
};

/** @type {function(...*):?} */
var _emscripten_stack_get_base = function() {
  return (_emscripten_stack_get_base = Module["asm"]["emscripten_stack_get_base"]).apply(null, arguments);
};

/** @type {function(...*):?} */
var _emscripten_stack_get_end = function() {
  return (_emscripten_stack_get_end = Module["asm"]["emscripten_stack_get_end"]).apply(null, arguments);
};

/** @type {function(...*):?} */
var stackSave = createExportWrapper("stackSave");
/** @type {function(...*):?} */
var stackRestore = createExportWrapper("stackRestore");
/** @type {function(...*):?} */
var stackAlloc = createExportWrapper("stackAlloc");
/** @type {function(...*):?} */
var _emscripten_stack_get_current = function() {
  return (_emscripten_stack_get_current = Module["asm"]["emscripten_stack_get_current"]).apply(null, arguments);
};

/** @type {function(...*):?} */
var dynCall_jiji = Module["dynCall_jiji"] = createExportWrapper("dynCall_jiji");
/** @type {function(...*):?} */
var dynCall_ji = Module["dynCall_ji"] = createExportWrapper("dynCall_ji");


// include: postamble.js
// === Auto-generated postamble setup entry stuff ===

var missingLibrarySymbols = [
  'growMemory',
  'isLeapYear',
  'ydayFromDate',
  'arraySum',
  'addDays',
  'inetPton4',
  'inetNtop4',
  'inetPton6',
  'inetNtop6',
  'readSockaddr',
  'writeSockaddr',
  'getHostByName',
  'traverseStack',
  'getCallstack',
  'emscriptenLog',
  'convertPCtoSourceLocation',
  'jstoi_s',
  'getDynCaller',
  'runtimeKeepalivePush',
  'runtimeKeepalivePop',
  'asmjsMangle',
  'HandleAllocator',
  'getNativeTypeSize',
  'STACK_SIZE',
  'STACK_ALIGN',
  'POINTER_SIZE',
  'ASSERTIONS',
  'writeI53ToI64Clamped',
  'writeI53ToI64Signaling',
  'writeI53ToU64Clamped',
  'writeI53ToU64Signaling',
  'convertI32PairToI53',
  'convertU32PairToI53',
  'getCFunc',
  'ccall',
  'cwrap',
  'uleb128Encode',
  'sigToWasmTypes',
  'generateFuncType',
  'convertJsFunctionToWasm',
  'getEmptyTableSlot',
  'updateTableMap',
  'getFunctionAddress',
  'addFunction',
  'removeFunction',
  'reallyNegative',
  'unSign',
  'strLen',
  'reSign',
  'formatString',
  'intArrayToString',
  'AsciiToString',
  'UTF16ToString',
  'stringToUTF16',
  'lengthBytesUTF16',
  'UTF32ToString',
  'stringToUTF32',
  'lengthBytesUTF32',
  'writeArrayToMemory',
  'fillDeviceOrientationEventData',
  'registerDeviceOrientationEventCallback',
  'fillDeviceMotionEventData',
  'registerDeviceMotionEventCallback',
  'screenOrientation',
  'fillOrientationChangeEventData',
  'registerOrientationChangeEventCallback',
  'hideEverythingExceptGivenElement',
  'restoreHiddenElements',
  'softFullscreenResizeWebGLRenderTarget',
  'registerPointerlockErrorEventCallback',
  'fillBatteryEventData',
  'battery',
  'registerBatteryEventCallback',
  'jsStackTrace',
  'stackTrace',
  'checkWasiClock',
  'wasiRightsToMuslOFlags',
  'wasiOFlagsToMuslOFlags',
  'createDyncallWrapper',
  'setImmediateWrapped',
  'clearImmediateWrapped',
  'polyfillSetImmediate',
  'getPromise',
  'makePromise',
  'idsToPromises',
  'makePromiseCallback',
  'ExceptionInfo',
  'getSocketFromFD',
  'getSocketAddress',
  '_setNetworkCallback',
  'writeGLArray',
  'registerWebGlEventCallback',
  'runAndAbortIfError',
  'GLFW_Window',
  'ALLOC_NORMAL',
  'ALLOC_STACK',
  'allocate',
  'writeStringToMemory',
  'writeAsciiToMemory',
];
missingLibrarySymbols.forEach(missingLibrarySymbol)

var unexportedSymbols = [
  'run',
  'addOnPreRun',
  'addOnInit',
  'addOnPreMain',
  'addOnExit',
  'addOnPostRun',
  'addRunDependency',
  'removeRunDependency',
  'FS_createFolder',
  'FS_createPath',
  'FS_createDataFile',
  'FS_createLazyFile',
  'FS_createLink',
  'FS_createDevice',
  'FS_unlink',
  'out',
  'err',
  'callMain',
  'abort',
  'keepRuntimeAlive',
  'wasmMemory',
  'stackAlloc',
  'stackSave',
  'stackRestore',
  'getTempRet0',
  'setTempRet0',
  'writeStackCookie',
  'checkStackCookie',
  'ptrToString',
  'zeroMemory',
  'exitJS',
  'getHeapMax',
  'abortOnCannotGrowMemory',
  'ENV',
  'MONTH_DAYS_REGULAR',
  'MONTH_DAYS_LEAP',
  'MONTH_DAYS_REGULAR_CUMULATIVE',
  'MONTH_DAYS_LEAP_CUMULATIVE',
  'ERRNO_CODES',
  'ERRNO_MESSAGES',
  'setErrNo',
  'DNS',
  'Protocols',
  'Sockets',
  'initRandomFill',
  'randomFill',
  'timers',
  'warnOnce',
  'UNWIND_CACHE',
  'readEmAsmArgsArray',
  'readEmAsmArgs',
  'runEmAsmFunction',
  'runMainThreadEmAsm',
  'jstoi_q',
  'getExecutableName',
  'listenOnce',
  'autoResumeAudioContext',
  'dynCallLegacy',
  'dynCall',
  'handleException',
  'callUserCallback',
  'maybeExit',
  'safeSetTimeout',
  'asyncLoad',
  'alignMemory',
  'mmapAlloc',
  'writeI53ToI64',
  'readI53FromI64',
  'readI53FromU64',
  'convertI32PairToI53Checked',
  'freeTableIndexes',
  'functionsInTableMap',
  'setValue',
  'getValue',
  'PATH',
  'PATH_FS',
  'UTF8Decoder',
  'UTF8ArrayToString',
  'UTF8ToString',
  'stringToUTF8Array',
  'stringToUTF8',
  'lengthBytesUTF8',
  'intArrayFromString',
  'stringToAscii',
  'UTF16Decoder',
  'stringToNewUTF8',
  'stringToUTF8OnStack',
  'JSEvents',
  'registerKeyEventCallback',
  'specialHTMLTargets',
  'maybeCStringToJsString',
  'findEventTarget',
  'findCanvasEventTarget',
  'getBoundingClientRect',
  'fillMouseEventData',
  'registerMouseEventCallback',
  'registerWheelEventCallback',
  'registerUiEventCallback',
  'registerFocusEventCallback',
  'fillFullscreenChangeEventData',
  'registerFullscreenChangeEventCallback',
  'JSEvents_requestFullscreen',
  'JSEvents_resizeCanvasForFullscreen',
  'registerRestoreOldStyle',
  'setLetterbox',
  'currentFullscreenStrategy',
  'restoreOldWindowedStyle',
  'doRequestFullscreen',
  'fillPointerlockChangeEventData',
  'registerPointerlockChangeEventCallback',
  'requestPointerLock',
  'fillVisibilityChangeEventData',
  'registerVisibilityChangeEventCallback',
  'registerTouchEventCallback',
  'fillGamepadEventData',
  'registerGamepadEventCallback',
  'registerBeforeUnloadEventCallback',
  'setCanvasElementSize',
  'getCanvasElementSize',
  'demangle',
  'demangleAll',
  'ExitStatus',
  'getEnvStrings',
  'doReadv',
  'doWritev',
  'promiseMap',
  'uncaughtExceptionCount',
  'exceptionLast',
  'exceptionCaught',
  'Browser',
  'setMainLoop',
  'wget',
  'SYSCALLS',
  'preloadPlugins',
  'FS_createPreloadedFile',
  'FS_modeStringToFlags',
  'FS_getMode',
  'FS',
  'MEMFS',
  'TTY',
  'PIPEFS',
  'SOCKFS',
  'tempFixedLengthArray',
  'miniTempWebGLFloatBuffers',
  'miniTempWebGLIntBuffers',
  'heapObjectForWebGLType',
  'heapAccessShiftForWebGLHeap',
  'webgl_enable_ANGLE_instanced_arrays',
  'webgl_enable_OES_vertex_array_object',
  'webgl_enable_WEBGL_draw_buffers',
  'webgl_enable_WEBGL_multi_draw',
  'GL',
  'emscriptenWebGLGet',
  'computeUnpackAlignedImageSize',
  'colorChannelsInGlTextureFormat',
  'emscriptenWebGLGetTexPixelData',
  '__glGenObject',
  'emscriptenWebGLGetUniform',
  'webglGetUniformLocation',
  'webglPrepareUniformLocationsBeforeFirstUse',
  'webglGetLeftBracePos',
  'emscriptenWebGLGetVertexAttrib',
  '__glGetActiveAttribOrUniform',
  'emscripten_webgl_power_preferences',
  'AL',
  'GLUT',
  'EGL',
  'GLEW',
  'IDBStore',
  'GLFW',
  'allocateUTF8',
  'allocateUTF8OnStack',
];
unexportedSymbols.forEach(unexportedRuntimeSymbol);



var calledRun;

dependenciesFulfilled = function runCaller() {
  // If run has never been called, and we should call run (INVOKE_RUN is true, and Module.noInitialRun is not false)
  if (!calledRun) run();
  if (!calledRun) dependenciesFulfilled = runCaller; // try this again later, after new deps are fulfilled
};

function callMain() {
  assert(runDependencies == 0, 'cannot call main when async dependencies remain! (listen on Module["onRuntimeInitialized"])');
  assert(__ATPRERUN__.length == 0, 'cannot call main when preRun functions remain to be called');

  var entryFunction = _main;

  var argc = 0;
  var argv = 0;

  try {

    var ret = entryFunction(argc, argv);

    // if we're not running an evented main loop, it's time to exit
    exitJS(ret, /* implicit = */ true);
    return ret;
  }
  catch (e) {
    return handleException(e);
  }
}

function stackCheckInit() {
  // This is normally called automatically during __wasm_call_ctors but need to
  // get these values before even running any of the ctors so we call it redundantly
  // here.
  _emscripten_stack_init();
  // TODO(sbc): Move writeStackCookie to native to to avoid this.
  writeStackCookie();
}

function run() {

  if (runDependencies > 0) {
    return;
  }

    stackCheckInit();

  preRun();

  // a preRun added a dependency, run will be called later
  if (runDependencies > 0) {
    return;
  }

  function doRun() {
    // run may have just been called through dependencies being fulfilled just in this very frame,
    // or while the async setStatus time below was happening
    if (calledRun) return;
    calledRun = true;
    Module['calledRun'] = true;

    if (ABORT) return;

    initRuntime();

    preMain();

    if (Module['onRuntimeInitialized']) Module['onRuntimeInitialized']();

    if (shouldRunNow) callMain();

    postRun();
  }

  if (Module['setStatus']) {
    Module['setStatus']('Running...');
    setTimeout(function() {
      setTimeout(function() {
        Module['setStatus']('');
      }, 1);
      doRun();
    }, 1);
  } else
  {
    doRun();
  }
  checkStackCookie();
}

function checkUnflushedContent() {
  // Compiler settings do not allow exiting the runtime, so flushing
  // the streams is not possible. but in ASSERTIONS mode we check
  // if there was something to flush, and if so tell the user they
  // should request that the runtime be exitable.
  // Normally we would not even include flush() at all, but in ASSERTIONS
  // builds we do so just for this check, and here we see if there is any
  // content to flush, that is, we check if there would have been
  // something a non-ASSERTIONS build would have not seen.
  // How we flush the streams depends on whether we are in SYSCALLS_REQUIRE_FILESYSTEM=0
  // mode (which has its own special function for this; otherwise, all
  // the code is inside libc)
  var oldOut = out;
  var oldErr = err;
  var has = false;
  out = err = (x) => {
    has = true;
  }
  try { // it doesn't matter if it fails
    _fflush(0);
    // also flush in the JS FS layer
    ['stdout', 'stderr'].forEach(function(name) {
      var info = FS.analyzePath('/dev/' + name);
      if (!info) return;
      var stream = info.object;
      var rdev = stream.rdev;
      var tty = TTY.ttys[rdev];
      if (tty && tty.output && tty.output.length) {
        has = true;
      }
    });
  } catch(e) {}
  out = oldOut;
  err = oldErr;
  if (has) {
    warnOnce('stdio streams had content in them that was not flushed. you should set EXIT_RUNTIME to 1 (see the FAQ), or make sure to emit a newline when you printf etc.');
  }
}

if (Module['preInit']) {
  if (typeof Module['preInit'] == 'function') Module['preInit'] = [Module['preInit']];
  while (Module['preInit'].length > 0) {
    Module['preInit'].pop()();
  }
}

// shouldRunNow refers to calling main(), not run().
var shouldRunNow = true;

if (Module['noInitialRun']) shouldRunNow = false;

run();


// end include: postamble.js