// 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)
/**
 * Web Worker API for libzim JavaScript bindings
 * 
 * This file provides the pre-JS portion of the web worker that handles ZIM file operations.
 * It is concatenated with postjs_file_api.js during the Emscripten build process (see Makefile)
 * to create a complete web worker script that can be used with WebAssembly or asm.js builds.
 * 
 * Supported actions: getEntryByPath, search, searchWithSnippets, suggest, getArticleCount, init
 */

self.addEventListener('message', function(e) {
    var action = e.data.action;
    var path = e.data.path;
    var outgoingMessagePort = e.ports[0];
    console.debug('WebWorker called with action=' + action);
    
    // Retrieve content from ZIM archive by path
    if (action === 'getEntryByPath') {
        var follow = e.data.follow;
        var entry = Module[action](path);
        if (entry) {
            var item = {};
            if (follow || !entry.isRedirect()) {
                item = entry.getItem(follow);
                // It's necessary to keep an instance of the blob till the end of this block,
                // to ensure that the corresponding content is not deleted on the C side.
                var blob = item.getData();
                var content = blob.getContent();
                // TODO : is there a more efficient way to make the Array detachable? So that it can be transfered back from the WebWorker without a copy?
                var contentArray = new Uint8Array(content);
                outgoingMessagePort.postMessage({ content: contentArray, mimetype: item.getMimetype(), isRedirect: entry.isRedirect()});
            }
            else {
                outgoingMessagePort.postMessage({ content: new Uint8Array(), isRedirect: true, redirectPath: entry.getRedirectEntry().getPath()});
            }
        }
        else {
            outgoingMessagePort.postMessage({ content: new Uint8Array(), mimetype: 'unknown', isRedirect: false});
        }
    } 
    // Full-text search across ZIM archive content (basic version - paths only)
    else if (action === 'search') {
        var text = e.data.text;
        var numResults = e.data.numResults || 50;
        var entries = Module[action](text, numResults);
        console.debug('Found nb results = ' + entries.size(), entries);
        var serializedResults = [];
        for (var i=0; i<entries.size(); i++) {
            var entry = entries.get(i);
            serializedResults.push({
                path: entry.getPath(),
                title: entry.getTitle(),
                snippet: null,
                score: null,
                wordCount: null
            });
        }
        outgoingMessagePort.postMessage({ results: serializedResults });
    } 
    // NEW: Enhanced full-text search with content snippets
    else if (action === 'searchWithSnippets') {
        var text = e.data.text;
        var numResults = e.data.numResults || 50;
        try {
            var searchResults = Module['searchWithSnippets'](text, numResults);
            console.debug('Found nb search results with snippets = ' + searchResults.size(), searchResults);
            var serializedResults = [];
            for (var i=0; i<searchResults.size(); i++) {
                var result = searchResults.get(i);
                try {
                    serializedResults.push({
                        path: result.getPath(),
                        title: result.getTitle(),
                        snippet: result.getSnippet(),
                        score: result.getScore(),
                        wordCount: result.getWordCount()
                    });
                } catch (error) {
                    console.warn('Error processing search result ' + i + ':', error);
                    // Include basic info even if snippet extraction fails
                    serializedResults.push({
                        path: result.getPath() || '',
                        title: result.getTitle() || '',
                        snippet: '',
                        score: 0,
                        wordCount: 0
                    });
                }
            }
            outgoingMessagePort.postMessage({ results: serializedResults });
        } catch (error) {
            console.error('searchWithSnippets error:', error);
            outgoingMessagePort.postMessage({ results: [], error: error.message });
        }
    } 
    // Title-based suggestions for autocomplete (faster than full-text search)
    else if (action === 'suggest') {
        var text = e.data.text;
        var numResults = e.data.numResults || 10;
        var suggestions = Module[action](text, numResults);
        console.debug('Found nb suggestions = ' + suggestions.size(), suggestions);
        var serializedSuggestions = [];
        for (var i=0; i<suggestions.size(); i++) {
            var entry = suggestions.get(i);
            serializedSuggestions.push({path: entry.getPath(), title: entry.getTitle()});
        }
        outgoingMessagePort.postMessage({ suggestions: serializedSuggestions });
    } 
    // Get total number of articles in the ZIM archive
    else if (action === 'getArticleCount') {
        var articleCount = Module[action]();
        outgoingMessagePort.postMessage(articleCount);
    } 
    // Initialize the ZIM archive with file system mounting
    else if (action === 'init') {
        var files = e.data.files;
        var assemblerType = e.data.assemblerType || 'runtime';
        // When using split ZIM files, we need to remove the last two letters of the suffix (like .zimaa -> .zim)
        var baseZimFileName = files[0].name.replace(/\.zim..$/, '.zim');
        Module = {};
        Module['onRuntimeInitialized'] = function() {
            Module.loadArchive('/work/' + baseZimFileName);
            console.debug(assemblerType + ' initialized');
            outgoingMessagePort.postMessage('runtime initialized');
        };
        Module['arguments'] = [];
        for (let i = 0; i < files.length; i++) {
              Module['arguments'].push('/work/' + files[i].name);
        }
        // Mount file system for ZIM file access (Electron vs browser environments)
        Module['preRun'] = function() {
            FS.mkdir('/work');
            if (files[0].readMode === 'electron') {
                var path = files[0].path.replace(/[^\\/]+$/, '');
                FS.mount(NODEFS, {
                    root: path
                }, '/work');    
            } else {
                FS.mount(WORKERFS, {
                    files: files
                }, '/work');
            }
        };
        console.debug('baseZimFileName = ' + baseZimFileName);
        console.debug("Module['arguments'] = " + Module['arguments']);

        // File continues in postjs_file_api.js - handles invalid actions and closes the event listener
        // Between prejs and postjs: Emscripten injects the compiled WebAssembly/asm.js Module code and bindings

// 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 = 101900;
  if (numericVersion < 101900) {
    throw new Error('This emscripten-generated code requires node v10.19.19.0 (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
    dbg(`node: uncaughtException: ${ex}`)
    if (ex !== 'unwind' && !(ex instanceof ExitStatus) && !(ex.context instanceof ExitStatus)) {
      throw ex;
    }
  });

  // Without this older versions of node (< v15) will log unhandled rejections
  // but return 0, which is not normally the desired behaviour.  This is
  // not be needed with node v15 and about because it is now the default
  // behaviour:
  // See https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode
  var nodeMajor = process.versions.node.split(".")[0];
  if (nodeMajor < 15) {
    process.on('unhandledRejection', (reason) => { throw reason; });
  }

  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)), 0);
  };

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

  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';



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.

// 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();
  dbg(`writeStackCookie: ${ptrToString(max)}`);
  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();
  dbg(`checkStackCookie: ${ptrToString(max)}`);
  // 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
// Base Emscripten EH error class
class EmscriptenEH extends Error {}

class EmscriptenSjLj extends EmscriptenEH {}

class CppException extends EmscriptenEH {
  constructor(excPtr) {
    super(excPtr);
    this.excPtr = excPtr;
    const excInfo = getExceptionMessage(excPtr);
    this.name = excInfo[0];
    this.message = excInfo[1];
  }
}

// end include: runtime_exceptions.js
var wasmBinaryFile;
  wasmBinaryFile = 'libzim-wasm.dev.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 === 83886080);
    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;
    }
  }

  dbg('asynchronously preparing wasm');
  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);
      }
    });
  }
}

var runtimeDebug = true; // Switch to false at runtime to disable logging at the right times

var printObjectList = [];

function prettyPrint(arg) {
  if (typeof arg == 'undefined') return '!UNDEFINED!';
  if (typeof arg == 'boolean') arg = arg + 0;
  if (!arg) return arg;
  var index = printObjectList.indexOf(arg);
  if (index >= 0) return '<' + arg + '|' + index + '>';
  if (arg.toString() == '[object HTMLImageElement]') {
    return arg + '\n\n';
  }
  if (arg.byteLength) {
    return '{' + Array.prototype.slice.call(arg, 0, Math.min(arg.length, 400)) + '}';
  }
  if (typeof arg == 'function') {
    return '<function>';
  } else if (typeof arg == 'object') {
    printObjectList.push(arg);
    return '<' + arg + '|' + (printObjectList.length-1) + '>';
  } else if (typeof arg == 'number') {
    if (arg > 0) return ptrToString(arg) + ' (' + arg + ')';
  }
  return arg;
}

// 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 ===


// end include: preamble.js

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

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

  function decrementExceptionRefcount(ptr) {
      ___cxa_decrement_exception_refcount(ptr);
    }

  function withStackSave(f) {
      var stack = stackSave();
      var ret = f();
      stackRestore(stack);
      return ret;
    }
  
  
  
  function 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;
    }
  
  function 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;
    }
  function 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);
    }
  function stringToUTF8OnStack(str) {
      var size = lengthBytesUTF8(str) + 1;
      var ret = stackAlloc(size);
      stringToUTF8(str, ret, size);
      return ret;
    }
  
  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}
     */
  function 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;
    }
  
  
    /**
     * 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}
     */
  function UTF8ToString(ptr, maxBytesToRead) {
      assert(typeof ptr == 'number');
      return ptr ? UTF8ArrayToString(HEAPU8, ptr, maxBytesToRead) : '';
    }
  function demangle(func) {
      // If demangle has failed before, stop demangling any further function names
      // This avoids an infinite recursion with malloc()->abort()->stackTrace()->demangle()->malloc()->...
      demangle.recursionGuard = (demangle.recursionGuard|0)+1;
      if (demangle.recursionGuard > 1) return func;
      return withStackSave(function() {
        try {
          var s = func;
          if (s.startsWith('__Z'))
            s = s.substr(1);
          var buf = stringToUTF8OnStack(s);
          var status = stackAlloc(4);
          var ret = ___cxa_demangle(buf, 0, 0, status);
          if (HEAP32[((status)>>2)] === 0 && ret) {
            return UTF8ToString(ret);
          }
          // otherwise, libcxxabi failed
        } catch(e) {
        } finally {
          _free(ret);
          if (demangle.recursionGuard < 2) --demangle.recursionGuard;
        }
        // failure when using libcxxabi, don't demangle
        return func;
      });
    }

  
  
  
  function getExceptionMessageCommon(ptr) {
      return withStackSave(function() {
        var type_addr_addr = stackAlloc(4);
        var message_addr_addr = stackAlloc(4);
        ___get_exception_message(ptr, type_addr_addr, message_addr_addr);
        var type_addr = HEAPU32[((type_addr_addr)>>2)];
        var message_addr = HEAPU32[((message_addr_addr)>>2)];
        var type = UTF8ToString(type_addr);
        _free(type_addr);
        var message;
        if (message_addr) {
          message = UTF8ToString(message_addr);
          _free(message_addr);
        }
        return [type, message];
      });
    }
  function getExceptionMessage(ptr) {
      return getExceptionMessageCommon(ptr);
    }
  Module["getExceptionMessage"] = getExceptionMessage;

  
    /**
     * @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}`);
    }
  }

  function incrementExceptionRefcount(ptr) {
      ___cxa_increment_exception_refcount(ptr);
    }

  function 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}`);
    }
  }

  function jsStackTrace() {
      var error = new Error();
      if (!error.stack) {
        // IE10+ special cases: It does have callstack info, but it is only
        // populated if an Error object is thrown, so try that as a special-case.
        try {
          throw new Error();
        } catch(e) {
          error = e;
        }
        if (!error.stack) {
          return '(no stack trace available)';
        }
      }
      return error.stack.toString();
    }
  
  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 + ']');
        });
    }
  function stackTrace() {
      var js = jsStackTrace();
      if (Module['extraStackTrace']) js += '\n' + Module['extraStackTrace']();
      return demangleAll(js);
    }

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

  function ___assert_fail(condition, filename, line, func) {
      abort(`Assertion failed: ${UTF8ToString(condition)}, at: ` + [filename ? UTF8ToString(filename) : 'unknown filename', line, func ? UTF8ToString(func) : 'unknown function']);
    }

  var wasmTableMirror = [];
  
  function 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;
    }
  function ___call_sighandler(fp, sig) {
      getWasmTableEntry(fp)(sig);
    }

  var exceptionCaught =  [];
  
  
  var uncaughtExceptionCount = 0;
  function ___cxa_begin_catch(ptr) {
      var info = new ExceptionInfo(ptr);
      if (!info.get_caught()) {
        info.set_caught(true);
        uncaughtExceptionCount--;
      }
      info.set_rethrown(false);
      exceptionCaught.push(info);
      dbg('__cxa_begin_catch ' + [ptrToString(ptr), 'stack', exceptionCaught]);
      ___cxa_increment_exception_refcount(info.excPtr);
      return info.get_exception_ptr();
    }

  
  var exceptionLast = 0;
  
  
  function ___cxa_end_catch() {
      // Clear state flag.
      _setThrew(0);
      assert(exceptionCaught.length > 0);
      // Call destructor if one is registered then clear it.
      var info = exceptionCaught.pop();
  
      dbg('__cxa_end_catch popped ' + [info, exceptionLast, 'stack', exceptionCaught]);
      ___cxa_decrement_exception_refcount(info.excPtr);
      exceptionLast = 0; // XXX in decRef?
    }

  
  
  /** @constructor */
  function ExceptionInfo(excPtr) {
      this.excPtr = excPtr;
      this.ptr = excPtr - 24;
  
      this.set_type = function(type) {
        HEAPU32[(((this.ptr)+(4))>>2)] = type;
      };
  
      this.get_type = function() {
        return HEAPU32[(((this.ptr)+(4))>>2)];
      };
  
      this.set_destructor = function(destructor) {
        HEAPU32[(((this.ptr)+(8))>>2)] = destructor;
      };
  
      this.get_destructor = function() {
        return HEAPU32[(((this.ptr)+(8))>>2)];
      };
  
      this.set_caught = function (caught) {
        caught = caught ? 1 : 0;
        HEAP8[(((this.ptr)+(12))>>0)] = caught;
      };
  
      this.get_caught = function () {
        return HEAP8[(((this.ptr)+(12))>>0)] != 0;
      };
  
      this.set_rethrown = function (rethrown) {
        rethrown = rethrown ? 1 : 0;
        HEAP8[(((this.ptr)+(13))>>0)] = rethrown;
      };
  
      this.get_rethrown = function () {
        return HEAP8[(((this.ptr)+(13))>>0)] != 0;
      };
  
      // Initialize native structure fields. Should be called once after allocated.
      this.init = function(type, destructor) {
        dbg('ExceptionInfo init: ' + [type, destructor]);
        this.set_adjusted_ptr(0);
        this.set_type(type);
        this.set_destructor(destructor);
      }
  
      this.set_adjusted_ptr = function(adjustedPtr) {
        HEAPU32[(((this.ptr)+(16))>>2)] = adjustedPtr;
      };
  
      this.get_adjusted_ptr = function() {
        return HEAPU32[(((this.ptr)+(16))>>2)];
      };
  
      // Get pointer which is expected to be received by catch clause in C++ code. It may be adjusted
      // when the pointer is casted to some of the exception object base classes (e.g. when virtual
      // inheritance is used). When a pointer is thrown this method should return the thrown pointer
      // itself.
      this.get_exception_ptr = function() {
        // Work around a fastcomp bug, this code is still included for some reason in a build without
        // exceptions support.
        var isPointer = ___cxa_is_pointer_type(this.get_type());
        if (isPointer) {
          return HEAPU32[((this.excPtr)>>2)];
        }
        var adjusted = this.get_adjusted_ptr();
        if (adjusted !== 0) return adjusted;
        return this.excPtr;
      };
    }
  
  function ___resumeException(ptr) {
      dbg("__resumeException " + [ptrToString(ptr), exceptionLast]);
      if (!exceptionLast) { 
        exceptionLast = new CppException(ptr);
      }
      throw exceptionLast;
    }
  
  
  /** @suppress {duplicate } */
  function ___cxa_find_matching_catch() {
      // Here we use explicit calls to `from64`/`to64` rather then using the
      // `__sig` attribute to perform these automatically.  This is because the
      // `__sig` wrapper uses arrow function notation, which is not compatible
      // with the use of `arguments` in this function.
      var thrown =
        exceptionLast && exceptionLast.excPtr;
      if (!thrown) {
        // just pass through the null ptr
        setTempRet0(0);
        return 0;
      }
      var info = new ExceptionInfo(thrown);
      info.set_adjusted_ptr(thrown);
      var thrownType = info.get_type();
      if (!thrownType) {
        // just pass through the thrown ptr
        setTempRet0(0);
        return thrown;
      }
  
      // can_catch receives a **, add indirection
      dbg("__cxa_find_matching_catch on " + ptrToString(thrown));
      // The different catch blocks are denoted by different types.
      // Due to inheritance, those types may not precisely match the
      // type of the thrown object. Find one which matches, and
      // return the type of the catch block which should be called.
      for (var i = 0; i < arguments.length; i++) {
        var caughtType = arguments[i];
        ;
  
        if (caughtType === 0 || caughtType === thrownType) {
          // Catch all clause matched or exactly the same type is caught
          break;
        }
        var adjusted_ptr_addr = info.ptr + 16;
        if (___cxa_can_catch(caughtType, thrownType, adjusted_ptr_addr)) {
          dbg("  __cxa_find_matching_catch found " + [ptrToString(info.get_adjusted_ptr()), caughtType]);
          setTempRet0(caughtType);
          return thrown;
        }
      }
      setTempRet0(thrownType);
      return thrown;
    }
  var ___cxa_find_matching_catch_2 = ___cxa_find_matching_catch;

  var ___cxa_find_matching_catch_3 = ___cxa_find_matching_catch;

  var ___cxa_find_matching_catch_4 = ___cxa_find_matching_catch;

  
  
  function ___cxa_rethrow() {
      var info = exceptionCaught.pop();
      if (!info) {
        abort('no exception to throw');
      }
      var ptr = info.excPtr;
      if (!info.get_rethrown()) {
        // Only pop if the corresponding push was through rethrow_primary_exception
        exceptionCaught.push(info);
        info.set_rethrown(true);
        info.set_caught(false);
        uncaughtExceptionCount++;
      }
      dbg('__cxa_rethrow, popped ' +
        [ptrToString(ptr), exceptionLast, 'stack', exceptionCaught]);
      exceptionLast = new CppException(ptr);
      throw exceptionLast;
    }

  
  
  function ___cxa_rethrow_primary_exception(ptr) {
      if (!ptr) return;
      var info = new ExceptionInfo(ptr);
      exceptionCaught.push(info);
      info.set_rethrown(true);
      ___cxa_rethrow();
    }

  
  
  function ___cxa_throw(ptr, type, destructor) {
      dbg('__cxa_throw: ' + [ptrToString(ptr), type, ptrToString(destructor)]);
      var info = new ExceptionInfo(ptr);
      // Initialize ExceptionInfo content after it was allocated in __cxa_allocate_exception.
      info.init(type, destructor);
      exceptionLast = new CppException(ptr);
      uncaughtExceptionCount++;
      throw exceptionLast;
    }

  function ___cxa_uncaught_exceptions() {
      return uncaughtExceptionCount;
    }


  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);
      }};
  
  function 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: function(array) { for (var i = 0; i < array.length; i++) array[i] = (Math.random()*256)|0 } };");
    }
  function 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('/');
      }};
  
  
  
  /** @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 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 = [];
          }
        }},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 = [];
          }
        }}};
  
  
  function zeroMemory(address, size) {
      HEAPU8.fill(0, address, address + size);
      return address;
    }
  
  function alignMemory(size, alignment) {
      assert(alignment, "alignment argument is required");
      return Math.ceil(size / alignment) * alignment;
    }
  function mmapAlloc(size) {
      size = alignMemory(size, 65536);
      var ptr = _emscripten_builtin_memalign(65536, size);
      if (!ptr) return 0;
      return zeroMemory(ptr, size);
    }
  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 the buffer is located in main memory (HEAP), and if
          // memory can grow, we can't hold on to references of the
          // memory buffer, as they may get invalidated. That means we
          // need to do copy its contents.
          if (buffer.buffer === HEAP8.buffer) {
            canOwn = false;
          }
  
          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: ptr, allocated: 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 */
  function 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_CODES = {};
  
  var NODEFS = {isWindows:false,staticInit:() => {
        NODEFS.isWindows = !!process.platform.match(/^win/);
        var flags = process.binding("constants");
        // Node.js 4 compatibility: it has no namespaces for constants
        if (flags["fs"]) {
          flags = flags["fs"];
        }
        NODEFS.flagsForNodeMap = {
          "1024": flags["O_APPEND"],
          "64": flags["O_CREAT"],
          "128": flags["O_EXCL"],
          "256": flags["O_NOCTTY"],
          "0": flags["O_RDONLY"],
          "2": flags["O_RDWR"],
          "4096": flags["O_SYNC"],
          "512": flags["O_TRUNC"],
          "1": flags["O_WRONLY"],
          "131072": flags["O_NOFOLLOW"],
        };
        // The 0 define must match on both sides, as otherwise we would not
        // know to add it.
        assert(NODEFS.flagsForNodeMap["0"] === 0);
      },convertNodeCode:(e) => {
        var code = e.code;
        assert(code in ERRNO_CODES, `unexpected node error code: ${code} (${e})`);
        return ERRNO_CODES[code];
      },mount:(mount) => {
        assert(ENVIRONMENT_IS_NODE);
        return NODEFS.createNode(null, '/', NODEFS.getMode(mount.opts.root), 0);
      },createNode:(parent, name, mode, dev) => {
        if (!FS.isDir(mode) && !FS.isFile(mode) && !FS.isLink(mode)) {
          throw new FS.ErrnoError(28);
        }
        var node = FS.createNode(parent, name, mode);
        node.node_ops = NODEFS.node_ops;
        node.stream_ops = NODEFS.stream_ops;
        return node;
      },getMode:(path) => {
        var stat;
        try {
          stat = fs.lstatSync(path);
          if (NODEFS.isWindows) {
            // Node.js on Windows never represents permission bit 'x', so
            // propagate read bits to execute bits
            stat.mode = stat.mode | ((stat.mode & 292) >> 2);
          }
        } catch (e) {
          if (!e.code) throw e;
          throw new FS.ErrnoError(NODEFS.convertNodeCode(e));
        }
        return stat.mode;
      },realPath:(node) => {
        var parts = [];
        while (node.parent !== node) {
          parts.push(node.name);
          node = node.parent;
        }
        parts.push(node.mount.opts.root);
        parts.reverse();
        return PATH.join.apply(null, parts);
      },flagsForNode:(flags) => {
        flags &= ~2097152; // Ignore this flag from musl, otherwise node.js fails to open the file.
        flags &= ~2048; // Ignore this flag from musl, otherwise node.js fails to open the file.
        flags &= ~32768; // Ignore this flag from musl, otherwise node.js fails to open the file.
        flags &= ~524288; // Some applications may pass it; it makes no sense for a single process.
        flags &= ~65536; // Node.js doesn't need this passed in, it errors.
        var newFlags = 0;
        for (var k in NODEFS.flagsForNodeMap) {
          if (flags & k) {
            newFlags |= NODEFS.flagsForNodeMap[k];
            flags ^= k;
          }
        }
        if (flags) {
          throw new FS.ErrnoError(28);
        }
        return newFlags;
      },node_ops:{getattr:(node) => {
          var path = NODEFS.realPath(node);
          var stat;
          try {
            stat = fs.lstatSync(path);
          } catch (e) {
            if (!e.code) throw e;
            throw new FS.ErrnoError(NODEFS.convertNodeCode(e));
          }
          // node.js v0.10.20 doesn't report blksize and blocks on Windows. Fake them with default blksize of 4096.
          // See http://support.microsoft.com/kb/140365
          if (NODEFS.isWindows && !stat.blksize) {
            stat.blksize = 4096;
          }
          if (NODEFS.isWindows && !stat.blocks) {
            stat.blocks = (stat.size+stat.blksize-1)/stat.blksize|0;
          }
          return {
            dev: stat.dev,
            ino: stat.ino,
            mode: stat.mode,
            nlink: stat.nlink,
            uid: stat.uid,
            gid: stat.gid,
            rdev: stat.rdev,
            size: stat.size,
            atime: stat.atime,
            mtime: stat.mtime,
            ctime: stat.ctime,
            blksize: stat.blksize,
            blocks: stat.blocks
          };
        },setattr:(node, attr) => {
          var path = NODEFS.realPath(node);
          try {
            if (attr.mode !== undefined) {
              fs.chmodSync(path, attr.mode);
              // update the common node structure mode as well
              node.mode = attr.mode;
            }
            if (attr.timestamp !== undefined) {
              var date = new Date(attr.timestamp);
              fs.utimesSync(path, date, date);
            }
            if (attr.size !== undefined) {
              fs.truncateSync(path, attr.size);
            }
          } catch (e) {
            if (!e.code) throw e;
            throw new FS.ErrnoError(NODEFS.convertNodeCode(e));
          }
        },lookup:(parent, name) => {
          var path = PATH.join2(NODEFS.realPath(parent), name);
          var mode = NODEFS.getMode(path);
          return NODEFS.createNode(parent, name, mode);
        },mknod:(parent, name, mode, dev) => {
          var node = NODEFS.createNode(parent, name, mode, dev);
          // create the backing node for this in the fs root as well
          var path = NODEFS.realPath(node);
          try {
            if (FS.isDir(node.mode)) {
              fs.mkdirSync(path, node.mode);
            } else {
              fs.writeFileSync(path, '', { mode: node.mode });
            }
          } catch (e) {
            if (!e.code) throw e;
            throw new FS.ErrnoError(NODEFS.convertNodeCode(e));
          }
          return node;
        },rename:(oldNode, newDir, newName) => {
          var oldPath = NODEFS.realPath(oldNode);
          var newPath = PATH.join2(NODEFS.realPath(newDir), newName);
          try {
            fs.renameSync(oldPath, newPath);
          } catch (e) {
            if (!e.code) throw e;
            throw new FS.ErrnoError(NODEFS.convertNodeCode(e));
          }
          oldNode.name = newName;
        },unlink:(parent, name) => {
          var path = PATH.join2(NODEFS.realPath(parent), name);
          try {
            fs.unlinkSync(path);
          } catch (e) {
            if (!e.code) throw e;
            throw new FS.ErrnoError(NODEFS.convertNodeCode(e));
          }
        },rmdir:(parent, name) => {
          var path = PATH.join2(NODEFS.realPath(parent), name);
          try {
            fs.rmdirSync(path);
          } catch (e) {
            if (!e.code) throw e;
            throw new FS.ErrnoError(NODEFS.convertNodeCode(e));
          }
        },readdir:(node) => {
          var path = NODEFS.realPath(node);
          try {
            return fs.readdirSync(path);
          } catch (e) {
            if (!e.code) throw e;
            throw new FS.ErrnoError(NODEFS.convertNodeCode(e));
          }
        },symlink:(parent, newName, oldPath) => {
          var newPath = PATH.join2(NODEFS.realPath(parent), newName);
          try {
            fs.symlinkSync(oldPath, newPath);
          } catch (e) {
            if (!e.code) throw e;
            throw new FS.ErrnoError(NODEFS.convertNodeCode(e));
          }
        },readlink:(node) => {
          var path = NODEFS.realPath(node);
          try {
            path = fs.readlinkSync(path);
            path = nodePath.relative(nodePath.resolve(node.mount.opts.root), path);
            return path;
          } catch (e) {
            if (!e.code) throw e;
            // node under windows can return code 'UNKNOWN' here:
            // https://github.com/emscripten-core/emscripten/issues/15468
            if (e.code === 'UNKNOWN') throw new FS.ErrnoError(28);
            throw new FS.ErrnoError(NODEFS.convertNodeCode(e));
          }
        }},stream_ops:{open:(stream) => {
          var path = NODEFS.realPath(stream.node);
          try {
            if (FS.isFile(stream.node.mode)) {
              stream.nfd = fs.openSync(path, NODEFS.flagsForNode(stream.flags));
            }
          } catch (e) {
            if (!e.code) throw e;
            throw new FS.ErrnoError(NODEFS.convertNodeCode(e));
          }
        },close:(stream) => {
          try {
            if (FS.isFile(stream.node.mode) && stream.nfd) {
              fs.closeSync(stream.nfd);
            }
          } catch (e) {
            if (!e.code) throw e;
            throw new FS.ErrnoError(NODEFS.convertNodeCode(e));
          }
        },read:(stream, buffer, offset, length, position) => {
          // Node.js < 6 compatibility: node errors on 0 length reads
          if (length === 0) return 0;
          try {
            return fs.readSync(stream.nfd, Buffer.from(buffer.buffer), offset, length, position);
          } catch (e) {
            throw new FS.ErrnoError(NODEFS.convertNodeCode(e));
          }
        },write:(stream, buffer, offset, length, position) => {
          try {
            return fs.writeSync(stream.nfd, Buffer.from(buffer.buffer), offset, length, position);
          } catch (e) {
            throw new FS.ErrnoError(NODEFS.convertNodeCode(e));
          }
        },llseek:(stream, offset, whence) => {
          var position = offset;
          if (whence === 1) {
            position += stream.position;
          } else if (whence === 2) {
            if (FS.isFile(stream.node.mode)) {
              try {
                var stat = fs.fstatSync(stream.nfd);
                position += stat.size;
              } catch (e) {
                throw new FS.ErrnoError(NODEFS.convertNodeCode(e));
              }
            }
          }
  
          if (position < 0) {
            throw new FS.ErrnoError(28);
          }
  
          return position;
        },mmap:(stream, length, position, prot, flags) => {
          if (!FS.isFile(stream.node.mode)) {
            throw new FS.ErrnoError(43);
          }
  
          var ptr = mmapAlloc(length);
  
          NODEFS.stream_ops.read(stream, HEAP8, ptr, length, position);
          return { ptr: ptr, allocated: true };
        },msync:(stream, buffer, offset, length, mmapFlags) => {
          NODEFS.stream_ops.write(stream, buffer, 0, length, offset, false);
          // should we check if bytesWritten and length are the same?
          return 0;
        }}};
  
  var WORKERFS = {DIR_MODE:16895,FILE_MODE:33279,reader:null,mount:function (mount) {
        assert(ENVIRONMENT_IS_WORKER);
        if (!WORKERFS.reader) WORKERFS.reader = new FileReaderSync();
        var root = WORKERFS.createNode(null, '/', WORKERFS.DIR_MODE, 0);
        var createdParents = {};
        function ensureParent(path) {
          // return the parent node, creating subdirs as necessary
          var parts = path.split('/');
          var parent = root;
          for (var i = 0; i < parts.length-1; i++) {
            var curr = parts.slice(0, i+1).join('/');
            // Issue 4254: Using curr as a node name will prevent the node
            // from being found in FS.nameTable when FS.open is called on
            // a path which holds a child of this node,
            // given that all FS functions assume node names
            // are just their corresponding parts within their given path,
            // rather than incremental aggregates which include their parent's
            // directories.
            if (!createdParents[curr]) {
              createdParents[curr] = WORKERFS.createNode(parent, parts[i], WORKERFS.DIR_MODE, 0);
            }
            parent = createdParents[curr];
          }
          return parent;
        }
        function base(path) {
          var parts = path.split('/');
          return parts[parts.length-1];
        }
        // We also accept FileList here, by using Array.prototype
        Array.prototype.forEach.call(mount.opts["files"] || [], function(file) {
          WORKERFS.createNode(ensureParent(file.name), base(file.name), WORKERFS.FILE_MODE, 0, file, file.lastModifiedDate);
        });
        (mount.opts["blobs"] || []).forEach(function(obj) {
          WORKERFS.createNode(ensureParent(obj["name"]), base(obj["name"]), WORKERFS.FILE_MODE, 0, obj["data"]);
        });
        (mount.opts["packages"] || []).forEach(function(pack) {
          pack['metadata'].files.forEach(function(file) {
            var name = file.filename.substr(1); // remove initial slash
            WORKERFS.createNode(ensureParent(name), base(name), WORKERFS.FILE_MODE, 0, pack['blob'].slice(file.start, file.end));
          });
        });
        return root;
      },createNode:function (parent, name, mode, dev, contents, mtime) {
        var node = FS.createNode(parent, name, mode);
        node.mode = mode;
        node.node_ops = WORKERFS.node_ops;
        node.stream_ops = WORKERFS.stream_ops;
        node.timestamp = (mtime || new Date).getTime();
        assert(WORKERFS.FILE_MODE !== WORKERFS.DIR_MODE);
        if (mode === WORKERFS.FILE_MODE) {
          node.size = contents.size;
          node.contents = contents;
        } else {
          node.size = 4096;
          node.contents = {};
        }
        if (parent) {
          parent.contents[name] = node;
        }
        return node;
      },node_ops:{getattr:function(node) {
          return {
            dev: 1,
            ino: node.id,
            mode: node.mode,
            nlink: 1,
            uid: 0,
            gid: 0,
            rdev: undefined,
            size: node.size,
            atime: new Date(node.timestamp),
            mtime: new Date(node.timestamp),
            ctime: new Date(node.timestamp),
            blksize: 4096,
            blocks: Math.ceil(node.size / 4096),
          };
        },setattr:function(node, attr) {
          if (attr.mode !== undefined) {
            node.mode = attr.mode;
          }
          if (attr.timestamp !== undefined) {
            node.timestamp = attr.timestamp;
          }
        },lookup:function(parent, name) {
          throw new FS.ErrnoError(44);
        },mknod:function (parent, name, mode, dev) {
          throw new FS.ErrnoError(63);
        },rename:function (oldNode, newDir, newName) {
          throw new FS.ErrnoError(63);
        },unlink:function(parent, name) {
          throw new FS.ErrnoError(63);
        },rmdir:function(parent, name) {
          throw new FS.ErrnoError(63);
        },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) {
          throw new FS.ErrnoError(63);
        }},stream_ops:{read:function (stream, buffer, offset, length, position) {
          if (position >= stream.node.size) return 0;
          var chunk = stream.node.contents.slice(position, position + length);
          var ab = WORKERFS.reader.readAsArrayBuffer(chunk);
          buffer.set(new Uint8Array(ab), offset);
          return chunk.size;
        },write:function (stream, buffer, offset, length, position) {
          throw new FS.ErrnoError(29);
        },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.size;
            }
          }
          if (position < 0) {
            throw new FS.ErrnoError(28);
          }
          return position;
        }}};
  
  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 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);
      },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: type,
          opts: opts,
          mountpoint: 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.getStream(fd);
        if (!stream) {
          throw new FS.ErrnoError(8);
        }
        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.getStream(fd);
        if (!stream) {
          throw new FS.ErrnoError(8);
        }
        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.getStream(fd);
        if (!stream) {
          throw new FS.ErrnoError(8);
        }
        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: node,
          path: FS.getPath(node),  // we want the absolute path to the node
          flags: 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.getStream(fd);
                if (!stream) throw new FS.ErrnoError(8);
                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,
          'NODEFS': NODEFS,
          'WORKERFS': WORKERFS,
        };
      },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: 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');
      }};
  
  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)+(8))>>2)] = stat.ino;
        HEAP32[(((buf)+(12))>>2)] = stat.mode;
        HEAPU32[(((buf)+(16))>>2)] = stat.nlink;
        HEAP32[(((buf)+(20))>>2)] = stat.uid;
        HEAP32[(((buf)+(24))>>2)] = stat.gid;
        HEAP32[(((buf)+(28))>>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)+(40))>>2)] = tempI64[0],HEAP32[(((buf)+(44))>>2)] = tempI64[1]);
        HEAP32[(((buf)+(48))>>2)] = 4096;
        HEAP32[(((buf)+(52))>>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)+(56))>>2)] = tempI64[0],HEAP32[(((buf)+(60))>>2)] = tempI64[1]);
        HEAPU32[(((buf)+(64))>>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)+(72))>>2)] = tempI64[0],HEAP32[(((buf)+(76))>>2)] = tempI64[1]);
        HEAPU32[(((buf)+(80))>>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)+(88))>>2)] = tempI64[0],HEAP32[(((buf)+(92))>>2)] = tempI64[1]);
        HEAPU32[(((buf)+(96))>>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)+(104))>>2)] = tempI64[0],HEAP32[(((buf)+(108))>>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.getStream(fd);
        if (!stream) throw new FS.ErrnoError(8);
        return stream;
      }};
  function ___syscall_fadvise64(fd, offset, len, advice) {
      return 0; // your advice is important to us (but we can't use it)
    }

  function setErrNo(value) {
      HEAP32[((___errno_location())>>2)] = value;
      return value;
    }
  
  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_fstat64(fd, buf) {
  try {
  
      var stream = SYSCALLS.getStreamFromFD(fd);
      return SYSCALLS.doStat(FS.stat, stream.path, buf);
    } catch (e) {
    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
    return -e.errno;
  }
  }

  function ___syscall_lstat64(path, buf) {
  try {
  
      path = SYSCALLS.getStr(path);
      return SYSCALLS.doStat(FS.lstat, path, buf);
    } catch (e) {
    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
    return -e.errno;
  }
  }

  function ___syscall_newfstatat(dirfd, path, buf, flags) {
  try {
  
      path = SYSCALLS.getStr(path);
      var nofollow = flags & 256;
      var allowEmpty = flags & 4096;
      flags = flags & (~6400);
      assert(!flags, `unknown flags in __syscall_newfstatat: ${flags}`);
      path = SYSCALLS.calculateAt(dirfd, path, allowEmpty);
      return SYSCALLS.doStat(nofollow ? FS.lstat : FS.stat, path, buf);
    } 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;
  }
  }

  function ___syscall_stat64(path, buf) {
  try {
  
      path = SYSCALLS.getStr(path);
      return SYSCALLS.doStat(FS.stat, path, buf);
    } catch (e) {
    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
    return -e.errno;
  }
  }

  function ___syscall_unlinkat(dirfd, path, flags) {
  try {
  
      path = SYSCALLS.getStr(path);
      path = SYSCALLS.calculateAt(dirfd, path);
      if (flags === 0) {
        FS.unlink(path);
      } else if (flags === 512) {
        FS.rmdir(path);
      } else {
        abort('Invalid flags passed to unlinkat');
      }
      return 0;
    } catch (e) {
    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
    return -e.errno;
  }
  }

  function __embind_register_bigint(primitiveType, name, size, minRange, maxRange) {}

  function getShiftFromSize(size) {
      switch (size) {
          case 1: return 0;
          case 2: return 1;
          case 4: return 2;
          case 8: return 3;
          default:
              throw new TypeError(`Unknown type size: ${size}`);
      }
    }
  
  function embind_init_charCodes() {
      var codes = new Array(256);
      for (var i = 0; i < 256; ++i) {
          codes[i] = String.fromCharCode(i);
      }
      embind_charCodes = codes;
    }
  var embind_charCodes = undefined;
  function readLatin1String(ptr) {
      var ret = "";
      var c = ptr;
      while (HEAPU8[c]) {
          ret += embind_charCodes[HEAPU8[c++]];
      }
      return ret;
    }
  
  var awaitingDependencies = {};
  
  var registeredTypes = {};
  
  var typeDependencies = {};
  
  var char_0 = 48;
  
  var char_9 = 57;
  function makeLegalFunctionName(name) {
      if (undefined === name) {
        return '_unknown';
      }
      name = name.replace(/[^a-zA-Z0-9_]/g, '$');
      var f = name.charCodeAt(0);
      if (f >= char_0 && f <= char_9) {
        return `_${name}`;
      }
      return name;
    }
  function createNamedFunction(name, body) {
      name = makeLegalFunctionName(name);
      // Use an abject with a computed property name to create a new function with
      // a name specified at runtime, but without using `new Function` or `eval`.
      return {
        [name]: function() {
          return body.apply(this, arguments);
        }
      }[name];
    }
  function extendError(baseErrorType, errorName) {
      var errorClass = createNamedFunction(errorName, function(message) {
        this.name = errorName;
        this.message = message;
  
        var stack = (new Error(message)).stack;
        if (stack !== undefined) {
          this.stack = this.toString() + '\n' +
              stack.replace(/^Error(:[^\n]*)?\n/, '');
        }
      });
      errorClass.prototype = Object.create(baseErrorType.prototype);
      errorClass.prototype.constructor = errorClass;
      errorClass.prototype.toString = function() {
        if (this.message === undefined) {
          return this.name;
        } else {
          return `${this.name}: ${this.message}`;
        }
      };
  
      return errorClass;
    }
  var BindingError = undefined;
  function throwBindingError(message) {
      throw new BindingError(message);
    }
  
  
  
  
  var InternalError = undefined;
  function throwInternalError(message) {
      throw new InternalError(message);
    }
  function whenDependentTypesAreResolved(myTypes, dependentTypes, getTypeConverters) {
      myTypes.forEach(function(type) {
          typeDependencies[type] = dependentTypes;
      });
  
      function onComplete(typeConverters) {
          var myTypeConverters = getTypeConverters(typeConverters);
          if (myTypeConverters.length !== myTypes.length) {
              throwInternalError('Mismatched type converter count');
          }
          for (var i = 0; i < myTypes.length; ++i) {
              registerType(myTypes[i], myTypeConverters[i]);
          }
      }
  
      var typeConverters = new Array(dependentTypes.length);
      var unregisteredTypes = [];
      var registered = 0;
      dependentTypes.forEach((dt, i) => {
        if (registeredTypes.hasOwnProperty(dt)) {
          typeConverters[i] = registeredTypes[dt];
        } else {
          unregisteredTypes.push(dt);
          if (!awaitingDependencies.hasOwnProperty(dt)) {
            awaitingDependencies[dt] = [];
          }
          awaitingDependencies[dt].push(() => {
            typeConverters[i] = registeredTypes[dt];
            ++registered;
            if (registered === unregisteredTypes.length) {
              onComplete(typeConverters);
            }
          });
        }
      });
      if (0 === unregisteredTypes.length) {
        onComplete(typeConverters);
      }
    }
  /** @param {Object=} options */
  function registerType(rawType, registeredInstance, options = {}) {
      if (!('argPackAdvance' in registeredInstance)) {
        throw new TypeError('registerType registeredInstance requires argPackAdvance');
      }
  
      var name = registeredInstance.name;
      if (!rawType) {
        throwBindingError(`type "${name}" must have a positive integer typeid pointer`);
      }
      if (registeredTypes.hasOwnProperty(rawType)) {
        if (options.ignoreDuplicateRegistrations) {
          return;
        } else {
          throwBindingError(`Cannot register type '${name}' twice`);
        }
      }
  
      registeredTypes[rawType] = registeredInstance;
      delete typeDependencies[rawType];
  
      if (awaitingDependencies.hasOwnProperty(rawType)) {
        var callbacks = awaitingDependencies[rawType];
        delete awaitingDependencies[rawType];
        callbacks.forEach((cb) => cb());
      }
    }
  function __embind_register_bool(rawType, name, size, trueValue, falseValue) {
      var shift = getShiftFromSize(size);
  
      name = readLatin1String(name);
      registerType(rawType, {
          name: name,
          'fromWireType': function(wt) {
              // ambiguous emscripten ABI: sometimes return values are
              // true or false, and sometimes integers (0 or 1)
              return !!wt;
          },
          'toWireType': function(destructors, o) {
              return o ? trueValue : falseValue;
          },
          'argPackAdvance': 8,
          'readValueFromPointer': function(pointer) {
              // TODO: if heap is fixed (like in asm.js) this could be executed outside
              var heap;
              if (size === 1) {
                  heap = HEAP8;
              } else if (size === 2) {
                  heap = HEAP16;
              } else if (size === 4) {
                  heap = HEAP32;
              } else {
                  throw new TypeError("Unknown boolean type size: " + name);
              }
              return this['fromWireType'](heap[pointer >> shift]);
          },
          destructorFunction: null, // This type does not need a destructor
      });
    }

  
  function ClassHandle_isAliasOf(other) {
      if (!(this instanceof ClassHandle)) {
        return false;
      }
      if (!(other instanceof ClassHandle)) {
        return false;
      }
  
      var leftClass = this.$$.ptrType.registeredClass;
      var left = this.$$.ptr;
      var rightClass = other.$$.ptrType.registeredClass;
      var right = other.$$.ptr;
  
      while (leftClass.baseClass) {
        left = leftClass.upcast(left);
        leftClass = leftClass.baseClass;
      }
  
      while (rightClass.baseClass) {
        right = rightClass.upcast(right);
        rightClass = rightClass.baseClass;
      }
  
      return leftClass === rightClass && left === right;
    }
  
  function shallowCopyInternalPointer(o) {
      return {
        count: o.count,
        deleteScheduled: o.deleteScheduled,
        preservePointerOnDelete: o.preservePointerOnDelete,
        ptr: o.ptr,
        ptrType: o.ptrType,
        smartPtr: o.smartPtr,
        smartPtrType: o.smartPtrType,
      };
    }
  
  function throwInstanceAlreadyDeleted(obj) {
      function getInstanceTypeName(handle) {
        return handle.$$.ptrType.registeredClass.name;
      }
      throwBindingError(getInstanceTypeName(obj) + ' instance already deleted');
    }
  
  var finalizationRegistry = false;
  
  function detachFinalizer(handle) {}
  
  function runDestructor($$) {
      if ($$.smartPtr) {
        $$.smartPtrType.rawDestructor($$.smartPtr);
      } else {
        $$.ptrType.registeredClass.rawDestructor($$.ptr);
      }
    }
  function releaseClassHandle($$) {
      $$.count.value -= 1;
      var toDelete = 0 === $$.count.value;
      if (toDelete) {
        runDestructor($$);
      }
    }
  
  function downcastPointer(ptr, ptrClass, desiredClass) {
      if (ptrClass === desiredClass) {
        return ptr;
      }
      if (undefined === desiredClass.baseClass) {
        return null; // no conversion
      }
  
      var rv = downcastPointer(ptr, ptrClass, desiredClass.baseClass);
      if (rv === null) {
        return null;
      }
      return desiredClass.downcast(rv);
    }
  
  var registeredPointers = {};
  
  function getInheritedInstanceCount() {
      return Object.keys(registeredInstances).length;
    }
  
  function getLiveInheritedInstances() {
      var rv = [];
      for (var k in registeredInstances) {
        if (registeredInstances.hasOwnProperty(k)) {
          rv.push(registeredInstances[k]);
        }
      }
      return rv;
    }
  
  var deletionQueue = [];
  function flushPendingDeletes() {
      while (deletionQueue.length) {
        var obj = deletionQueue.pop();
        obj.$$.deleteScheduled = false;
        obj['delete']();
      }
    }
  
  var delayFunction = undefined;
  
  
  function setDelayFunction(fn) {
      delayFunction = fn;
      if (deletionQueue.length && delayFunction) {
        delayFunction(flushPendingDeletes);
      }
    }
  function init_embind() {
      Module['getInheritedInstanceCount'] = getInheritedInstanceCount;
      Module['getLiveInheritedInstances'] = getLiveInheritedInstances;
      Module['flushPendingDeletes'] = flushPendingDeletes;
      Module['setDelayFunction'] = setDelayFunction;
    }
  var registeredInstances = {};
  
  function getBasestPointer(class_, ptr) {
      if (ptr === undefined) {
          throwBindingError('ptr should not be undefined');
      }
      while (class_.baseClass) {
          ptr = class_.upcast(ptr);
          class_ = class_.baseClass;
      }
      return ptr;
    }
  function getInheritedInstance(class_, ptr) {
      ptr = getBasestPointer(class_, ptr);
      return registeredInstances[ptr];
    }
  
  
  function makeClassHandle(prototype, record) {
      if (!record.ptrType || !record.ptr) {
        throwInternalError('makeClassHandle requires ptr and ptrType');
      }
      var hasSmartPtrType = !!record.smartPtrType;
      var hasSmartPtr = !!record.smartPtr;
      if (hasSmartPtrType !== hasSmartPtr) {
        throwInternalError('Both smartPtrType and smartPtr must be specified');
      }
      record.count = { value: 1 };
      return attachFinalizer(Object.create(prototype, {
        $$: {
            value: record,
        },
      }));
    }
  function RegisteredPointer_fromWireType(ptr) {
      // ptr is a raw pointer (or a raw smartpointer)
  
      // rawPointer is a maybe-null raw pointer
      var rawPointer = this.getPointee(ptr);
      if (!rawPointer) {
        this.destructor(ptr);
        return null;
      }
  
      var registeredInstance = getInheritedInstance(this.registeredClass, rawPointer);
      if (undefined !== registeredInstance) {
        // JS object has been neutered, time to repopulate it
        if (0 === registeredInstance.$$.count.value) {
          registeredInstance.$$.ptr = rawPointer;
          registeredInstance.$$.smartPtr = ptr;
          return registeredInstance['clone']();
        } else {
          // else, just increment reference count on existing object
          // it already has a reference to the smart pointer
          var rv = registeredInstance['clone']();
          this.destructor(ptr);
          return rv;
        }
      }
  
      function makeDefaultHandle() {
        if (this.isSmartPointer) {
          return makeClassHandle(this.registeredClass.instancePrototype, {
            ptrType: this.pointeeType,
            ptr: rawPointer,
            smartPtrType: this,
            smartPtr: ptr,
          });
        } else {
          return makeClassHandle(this.registeredClass.instancePrototype, {
            ptrType: this,
            ptr: ptr,
          });
        }
      }
  
      var actualType = this.registeredClass.getActualType(rawPointer);
      var registeredPointerRecord = registeredPointers[actualType];
      if (!registeredPointerRecord) {
        return makeDefaultHandle.call(this);
      }
  
      var toType;
      if (this.isConst) {
        toType = registeredPointerRecord.constPointerType;
      } else {
        toType = registeredPointerRecord.pointerType;
      }
      var dp = downcastPointer(
          rawPointer,
          this.registeredClass,
          toType.registeredClass);
      if (dp === null) {
        return makeDefaultHandle.call(this);
      }
      if (this.isSmartPointer) {
        return makeClassHandle(toType.registeredClass.instancePrototype, {
          ptrType: toType,
          ptr: dp,
          smartPtrType: this,
          smartPtr: ptr,
        });
      } else {
        return makeClassHandle(toType.registeredClass.instancePrototype, {
          ptrType: toType,
          ptr: dp,
        });
      }
    }
  function attachFinalizer(handle) {
      if ('undefined' === typeof FinalizationRegistry) {
        attachFinalizer = (handle) => handle;
        return handle;
      }
      // If the running environment has a FinalizationRegistry (see
      // https://github.com/tc39/proposal-weakrefs), then attach finalizers
      // for class handles.  We check for the presence of FinalizationRegistry
      // at run-time, not build-time.
      finalizationRegistry = new FinalizationRegistry((info) => {
        console.warn(info.leakWarning.stack.replace(/^Error: /, ''));
        releaseClassHandle(info.$$);
      });
      attachFinalizer = (handle) => {
        var $$ = handle.$$;
        var hasSmartPtr = !!$$.smartPtr;
        if (hasSmartPtr) {
          // We should not call the destructor on raw pointers in case other code expects the pointee to live
          var info = { $$: $$ };
          // Create a warning as an Error instance in advance so that we can store
          // the current stacktrace and point to it when / if a leak is detected.
          // This is more useful than the empty stacktrace of `FinalizationRegistry`
          // callback.
          var cls = $$.ptrType.registeredClass;
          info.leakWarning = new Error(`Embind found a leaked C++ instance ${cls.name} <${ptrToString($$.ptr)}>.\n` +
          "We'll free it automatically in this case, but this functionality is not reliable across various environments.\n" +
          "Make sure to invoke .delete() manually once you're done with the instance instead.\n" +
          "Originally allocated"); // `.stack` will add "at ..." after this sentence
          if ('captureStackTrace' in Error) {
            Error.captureStackTrace(info.leakWarning, RegisteredPointer_fromWireType);
          }
          finalizationRegistry.register(handle, info, handle);
        }
        return handle;
      };
      detachFinalizer = (handle) => finalizationRegistry.unregister(handle);
      return attachFinalizer(handle);
    }
  function ClassHandle_clone() {
      if (!this.$$.ptr) {
        throwInstanceAlreadyDeleted(this);
      }
  
      if (this.$$.preservePointerOnDelete) {
        this.$$.count.value += 1;
        return this;
      } else {
        var clone = attachFinalizer(Object.create(Object.getPrototypeOf(this), {
          $$: {
            value: shallowCopyInternalPointer(this.$$),
          }
        }));
  
        clone.$$.count.value += 1;
        clone.$$.deleteScheduled = false;
        return clone;
      }
    }
  
  
  
  
  function ClassHandle_delete() {
      if (!this.$$.ptr) {
        throwInstanceAlreadyDeleted(this);
      }
  
      if (this.$$.deleteScheduled && !this.$$.preservePointerOnDelete) {
        throwBindingError('Object already scheduled for deletion');
      }
  
      detachFinalizer(this);
      releaseClassHandle(this.$$);
  
      if (!this.$$.preservePointerOnDelete) {
        this.$$.smartPtr = undefined;
        this.$$.ptr = undefined;
      }
    }
  
  function ClassHandle_isDeleted() {
      return !this.$$.ptr;
    }
  
  
  
  function ClassHandle_deleteLater() {
      if (!this.$$.ptr) {
        throwInstanceAlreadyDeleted(this);
      }
      if (this.$$.deleteScheduled && !this.$$.preservePointerOnDelete) {
        throwBindingError('Object already scheduled for deletion');
      }
      deletionQueue.push(this);
      if (deletionQueue.length === 1 && delayFunction) {
        delayFunction(flushPendingDeletes);
      }
      this.$$.deleteScheduled = true;
      return this;
    }
  function init_ClassHandle() {
      ClassHandle.prototype['isAliasOf'] = ClassHandle_isAliasOf;
      ClassHandle.prototype['clone'] = ClassHandle_clone;
      ClassHandle.prototype['delete'] = ClassHandle_delete;
      ClassHandle.prototype['isDeleted'] = ClassHandle_isDeleted;
      ClassHandle.prototype['deleteLater'] = ClassHandle_deleteLater;
    }
  function ClassHandle() {
    }
  
  
  
  function ensureOverloadTable(proto, methodName, humanName) {
      if (undefined === proto[methodName].overloadTable) {
        var prevFunc = proto[methodName];
        // Inject an overload resolver function that routes to the appropriate overload based on the number of arguments.
        proto[methodName] = function() {
          // TODO This check can be removed in -O3 level "unsafe" optimizations.
          if (!proto[methodName].overloadTable.hasOwnProperty(arguments.length)) {
              throwBindingError(`Function '${humanName}' called with an invalid number of arguments (${arguments.length}) - expects one of (${proto[methodName].overloadTable})!`);
          }
          return proto[methodName].overloadTable[arguments.length].apply(this, arguments);
        };
        // Move the previous function into the overload table.
        proto[methodName].overloadTable = [];
        proto[methodName].overloadTable[prevFunc.argCount] = prevFunc;
      }
    }
  
  /** @param {number=} numArguments */
  function exposePublicSymbol(name, value, numArguments) {
      if (Module.hasOwnProperty(name)) {
        if (undefined === numArguments || (undefined !== Module[name].overloadTable && undefined !== Module[name].overloadTable[numArguments])) {
          throwBindingError(`Cannot register public name '${name}' twice`);
        }
  
        // We are exposing a function with the same name as an existing function. Create an overload table and a function selector
        // that routes between the two.
        ensureOverloadTable(Module, name, name);
        if (Module.hasOwnProperty(numArguments)) {
          throwBindingError(`Cannot register multiple overloads of a function with the same number of arguments (${numArguments})!`);
        }
        // Add the new function into the overload table.
        Module[name].overloadTable[numArguments] = value;
      }
      else {
        Module[name] = value;
        if (undefined !== numArguments) {
          Module[name].numArguments = numArguments;
        }
      }
    }
  
  
  
  /** @constructor */
  function RegisteredClass(name,
                               constructor,
                               instancePrototype,
                               rawDestructor,
                               baseClass,
                               getActualType,
                               upcast,
                               downcast) {
      this.name = name;
      this.constructor = constructor;
      this.instancePrototype = instancePrototype;
      this.rawDestructor = rawDestructor;
      this.baseClass = baseClass;
      this.getActualType = getActualType;
      this.upcast = upcast;
      this.downcast = downcast;
      this.pureVirtualFunctions = [];
    }
  
  
  function upcastPointer(ptr, ptrClass, desiredClass) {
      while (ptrClass !== desiredClass) {
        if (!ptrClass.upcast) {
          throwBindingError(`Expected null or instance of ${desiredClass.name}, got an instance of ${ptrClass.name}`);
        }
        ptr = ptrClass.upcast(ptr);
        ptrClass = ptrClass.baseClass;
      }
      return ptr;
    }
  function constNoSmartPtrRawPointerToWireType(destructors, handle) {
      if (handle === null) {
        if (this.isReference) {
          throwBindingError(`null is not a valid ${this.name}`);
        }
        return 0;
      }
  
      if (!handle.$$) {
        throwBindingError(`Cannot pass "${embindRepr(handle)}" as a ${this.name}`);
      }
      if (!handle.$$.ptr) {
        throwBindingError(`Cannot pass deleted object as a pointer of type ${this.name}`);
      }
      var handleClass = handle.$$.ptrType.registeredClass;
      var ptr = upcastPointer(handle.$$.ptr, handleClass, this.registeredClass);
      return ptr;
    }
  
  
  function genericPointerToWireType(destructors, handle) {
      var ptr;
      if (handle === null) {
        if (this.isReference) {
          throwBindingError(`null is not a valid ${this.name}`);
        }
  
        if (this.isSmartPointer) {
          ptr = this.rawConstructor();
          if (destructors !== null) {
            destructors.push(this.rawDestructor, ptr);
          }
          return ptr;
        } else {
          return 0;
        }
      }
  
      if (!handle.$$) {
        throwBindingError(`Cannot pass "${embindRepr(handle)}" as a ${this.name}`);
      }
      if (!handle.$$.ptr) {
        throwBindingError(`Cannot pass deleted object as a pointer of type ${this.name}`);
      }
      if (!this.isConst && handle.$$.ptrType.isConst) {
        throwBindingError(`Cannot convert argument of type ${(handle.$$.smartPtrType ? handle.$$.smartPtrType.name : handle.$$.ptrType.name)} to parameter type ${this.name}`);
      }
      var handleClass = handle.$$.ptrType.registeredClass;
      ptr = upcastPointer(handle.$$.ptr, handleClass, this.registeredClass);
  
      if (this.isSmartPointer) {
        // TODO: this is not strictly true
        // We could support BY_EMVAL conversions from raw pointers to smart pointers
        // because the smart pointer can hold a reference to the handle
        if (undefined === handle.$$.smartPtr) {
          throwBindingError('Passing raw pointer to smart pointer is illegal');
        }
  
        switch (this.sharingPolicy) {
          case 0: // NONE
            // no upcasting
            if (handle.$$.smartPtrType === this) {
              ptr = handle.$$.smartPtr;
            } else {
              throwBindingError(`Cannot convert argument of type ${(handle.$$.smartPtrType ? handle.$$.smartPtrType.name : handle.$$.ptrType.name)} to parameter type ${this.name}`);
            }
            break;
  
          case 1: // INTRUSIVE
            ptr = handle.$$.smartPtr;
            break;
  
          case 2: // BY_EMVAL
            if (handle.$$.smartPtrType === this) {
              ptr = handle.$$.smartPtr;
            } else {
              var clonedHandle = handle['clone']();
              ptr = this.rawShare(
                ptr,
                Emval.toHandle(function() {
                  clonedHandle['delete']();
                })
              );
              if (destructors !== null) {
                destructors.push(this.rawDestructor, ptr);
              }
            }
            break;
  
          default:
            throwBindingError('Unsupporting sharing policy');
        }
      }
      return ptr;
    }
  
  
  function nonConstNoSmartPtrRawPointerToWireType(destructors, handle) {
      if (handle === null) {
        if (this.isReference) {
          throwBindingError(`null is not a valid ${this.name}`);
        }
        return 0;
      }
  
      if (!handle.$$) {
        throwBindingError(`Cannot pass "${embindRepr(handle)}" as a ${this.name}`);
      }
      if (!handle.$$.ptr) {
        throwBindingError(`Cannot pass deleted object as a pointer of type ${this.name}`);
      }
      if (handle.$$.ptrType.isConst) {
          throwBindingError(`Cannot convert argument of type ${handle.$$.ptrType.name} to parameter type ${this.name}`);
      }
      var handleClass = handle.$$.ptrType.registeredClass;
      var ptr = upcastPointer(handle.$$.ptr, handleClass, this.registeredClass);
      return ptr;
    }
  
  function simpleReadValueFromPointer(pointer) {
      return this['fromWireType'](HEAP32[((pointer)>>2)]);
    }
  
  function RegisteredPointer_getPointee(ptr) {
      if (this.rawGetPointee) {
        ptr = this.rawGetPointee(ptr);
      }
      return ptr;
    }
  
  function RegisteredPointer_destructor(ptr) {
      if (this.rawDestructor) {
        this.rawDestructor(ptr);
      }
    }
  
  function RegisteredPointer_deleteObject(handle) {
      if (handle !== null) {
        handle['delete']();
      }
    }
  
  function init_RegisteredPointer() {
      RegisteredPointer.prototype.getPointee = RegisteredPointer_getPointee;
      RegisteredPointer.prototype.destructor = RegisteredPointer_destructor;
      RegisteredPointer.prototype['argPackAdvance'] = 8;
      RegisteredPointer.prototype['readValueFromPointer'] = simpleReadValueFromPointer;
      RegisteredPointer.prototype['deleteObject'] = RegisteredPointer_deleteObject;
      RegisteredPointer.prototype['fromWireType'] = RegisteredPointer_fromWireType;
    }
  /** @constructor
      @param {*=} pointeeType,
      @param {*=} sharingPolicy,
      @param {*=} rawGetPointee,
      @param {*=} rawConstructor,
      @param {*=} rawShare,
      @param {*=} rawDestructor,
       */
  function RegisteredPointer(
      name,
      registeredClass,
      isReference,
      isConst,
  
      // smart pointer properties
      isSmartPointer,
      pointeeType,
      sharingPolicy,
      rawGetPointee,
      rawConstructor,
      rawShare,
      rawDestructor
    ) {
      this.name = name;
      this.registeredClass = registeredClass;
      this.isReference = isReference;
      this.isConst = isConst;
  
      // smart pointer properties
      this.isSmartPointer = isSmartPointer;
      this.pointeeType = pointeeType;
      this.sharingPolicy = sharingPolicy;
      this.rawGetPointee = rawGetPointee;
      this.rawConstructor = rawConstructor;
      this.rawShare = rawShare;
      this.rawDestructor = rawDestructor;
  
      if (!isSmartPointer && registeredClass.baseClass === undefined) {
        if (isConst) {
          this['toWireType'] = constNoSmartPtrRawPointerToWireType;
          this.destructorFunction = null;
        } else {
          this['toWireType'] = nonConstNoSmartPtrRawPointerToWireType;
          this.destructorFunction = null;
        }
      } else {
        this['toWireType'] = genericPointerToWireType;
        // Here we must leave this.destructorFunction undefined, since whether genericPointerToWireType returns
        // a pointer that needs to be freed up is runtime-dependent, and cannot be evaluated at registration time.
        // TODO: Create an alternative mechanism that allows removing the use of var destructors = []; array in
        //       craftInvokerFunction altogether.
      }
    }
  
  /** @param {number=} numArguments */
  function replacePublicSymbol(name, value, numArguments) {
      if (!Module.hasOwnProperty(name)) {
        throwInternalError('Replacing nonexistant public symbol');
      }
      // If there's an overload table for this symbol, replace the symbol in the overload table instead.
      if (undefined !== Module[name].overloadTable && undefined !== numArguments) {
        Module[name].overloadTable[numArguments] = value;
      }
      else {
        Module[name] = value;
        Module[name].argCount = numArguments;
      }
    }
  
  
  
  function 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);
    }
  
  
  /** @param {Object=} args */
  function 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;
  
    }
  
  function getDynCaller(sig, ptr) {
      assert(sig.includes('j') || sig.includes('p'), 'getDynCaller should only be called with i64 sigs')
      var argCache = [];
      return function() {
        argCache.length = 0;
        Object.assign(argCache, arguments);
        return dynCall(sig, ptr, argCache);
      };
    }
  
  
  function embind__requireFunction(signature, rawFunction) {
      signature = readLatin1String(signature);
  
      function makeDynCaller() {
        if (signature.includes('j')) {
          return getDynCaller(signature, rawFunction);
        }
        return getWasmTableEntry(rawFunction);
      }
  
      var fp = makeDynCaller();
      if (typeof fp != "function") {
          throwBindingError(`unknown function pointer with signature ${signature}: ${rawFunction}`);
      }
      return fp;
    }
  
  
  
  var UnboundTypeError = undefined;
  
  
  
  function getTypeName(type) {
      var ptr = ___getTypeName(type);
      var rv = readLatin1String(ptr);
      _free(ptr);
      return rv;
    }
  function throwUnboundTypeError(message, types) {
      var unboundTypes = [];
      var seen = {};
      function visit(type) {
        if (seen[type]) {
          return;
        }
        if (registeredTypes[type]) {
          return;
        }
        if (typeDependencies[type]) {
          typeDependencies[type].forEach(visit);
          return;
        }
        unboundTypes.push(type);
        seen[type] = true;
      }
      types.forEach(visit);
  
      throw new UnboundTypeError(`${message}: ` + unboundTypes.map(getTypeName).join([', ']));
    }
  
  function __embind_register_class(rawType,
                                     rawPointerType,
                                     rawConstPointerType,
                                     baseClassRawType,
                                     getActualTypeSignature,
                                     getActualType,
                                     upcastSignature,
                                     upcast,
                                     downcastSignature,
                                     downcast,
                                     name,
                                     destructorSignature,
                                     rawDestructor) {
      name = readLatin1String(name);
      getActualType = embind__requireFunction(getActualTypeSignature, getActualType);
      if (upcast) {
        upcast = embind__requireFunction(upcastSignature, upcast);
      }
      if (downcast) {
        downcast = embind__requireFunction(downcastSignature, downcast);
      }
      rawDestructor = embind__requireFunction(destructorSignature, rawDestructor);
      var legalFunctionName = makeLegalFunctionName(name);
  
      exposePublicSymbol(legalFunctionName, function() {
        // this code cannot run if baseClassRawType is zero
        throwUnboundTypeError(`Cannot construct ${name} due to unbound types`, [baseClassRawType]);
      });
  
      whenDependentTypesAreResolved(
        [rawType, rawPointerType, rawConstPointerType],
        baseClassRawType ? [baseClassRawType] : [],
        function(base) {
          base = base[0];
  
          var baseClass;
          var basePrototype;
          if (baseClassRawType) {
            baseClass = base.registeredClass;
            basePrototype = baseClass.instancePrototype;
          } else {
            basePrototype = ClassHandle.prototype;
          }
  
          var constructor = createNamedFunction(legalFunctionName, function() {
            if (Object.getPrototypeOf(this) !== instancePrototype) {
              throw new BindingError("Use 'new' to construct " + name);
            }
            if (undefined === registeredClass.constructor_body) {
              throw new BindingError(name + " has no accessible constructor");
            }
            var body = registeredClass.constructor_body[arguments.length];
            if (undefined === body) {
              throw new BindingError(`Tried to invoke ctor of ${name} with invalid number of parameters (${arguments.length}) - expected (${Object.keys(registeredClass.constructor_body).toString()}) parameters instead!`);
            }
            return body.apply(this, arguments);
          });
  
          var instancePrototype = Object.create(basePrototype, {
            constructor: { value: constructor },
          });
  
          constructor.prototype = instancePrototype;
  
          var registeredClass = new RegisteredClass(name,
                                                    constructor,
                                                    instancePrototype,
                                                    rawDestructor,
                                                    baseClass,
                                                    getActualType,
                                                    upcast,
                                                    downcast);
  
          if (registeredClass.baseClass) {
            // Keep track of class hierarchy. Used to allow sub-classes to inherit class functions.
            if (registeredClass.baseClass.__derivedClasses === undefined) {
              registeredClass.baseClass.__derivedClasses = [];
            }
  
            registeredClass.baseClass.__derivedClasses.push(registeredClass);
          }
  
          var referenceConverter = new RegisteredPointer(name,
                                                         registeredClass,
                                                         true,
                                                         false,
                                                         false);
  
          var pointerConverter = new RegisteredPointer(name + '*',
                                                       registeredClass,
                                                       false,
                                                       false,
                                                       false);
  
          var constPointerConverter = new RegisteredPointer(name + ' const*',
                                                            registeredClass,
                                                            false,
                                                            true,
                                                            false);
  
          registeredPointers[rawType] = {
            pointerType: pointerConverter,
            constPointerType: constPointerConverter
          };
  
          replacePublicSymbol(legalFunctionName, constructor);
  
          return [referenceConverter, pointerConverter, constPointerConverter];
        }
      );
    }

  function heap32VectorToArray(count, firstElement) {
      var array = [];
      for (var i = 0; i < count; i++) {
          // TODO(https://github.com/emscripten-core/emscripten/issues/17310):
          // Find a way to hoist the `>> 2` or `>> 3` out of this loop.
          array.push(HEAPU32[(((firstElement)+(i * 4))>>2)]);
      }
      return array;
    }
  
  
  function runDestructors(destructors) {
      while (destructors.length) {
        var ptr = destructors.pop();
        var del = destructors.pop();
        del(ptr);
      }
    }
  
  
  
  
  
  
  function craftInvokerFunction(humanName, argTypes, classType, cppInvokerFunc, cppTargetFunc, /** boolean= */ isAsync) {
      // humanName: a human-readable string name for the function to be generated.
      // argTypes: An array that contains the embind type objects for all types in the function signature.
      //    argTypes[0] is the type object for the function return value.
      //    argTypes[1] is the type object for function this object/class type, or null if not crafting an invoker for a class method.
      //    argTypes[2...] are the actual function parameters.
      // classType: The embind type object for the class to be bound, or null if this is not a method of a class.
      // cppInvokerFunc: JS Function object to the C++-side function that interops into C++ code.
      // cppTargetFunc: Function pointer (an integer to FUNCTION_TABLE) to the target C++ function the cppInvokerFunc will end up calling.
      // isAsync: Optional. If true, returns an async function. Async bindings are only supported with JSPI.
      var argCount = argTypes.length;
  
      if (argCount < 2) {
        throwBindingError("argTypes array size mismatch! Must at least get return value and 'this' types!");
      }
  
      assert(!isAsync, 'Async bindings are only supported with JSPI.');
  
      var isClassMethodFunc = (argTypes[1] !== null && classType !== null);
  
      // Free functions with signature "void function()" do not need an invoker that marshalls between wire types.
  // TODO: This omits argument count check - enable only at -O3 or similar.
  //    if (ENABLE_UNSAFE_OPTS && argCount == 2 && argTypes[0].name == "void" && !isClassMethodFunc) {
  //       return FUNCTION_TABLE[fn];
  //    }
  
      // Determine if we need to use a dynamic stack to store the destructors for the function parameters.
      // TODO: Remove this completely once all function invokers are being dynamically generated.
      var needsDestructorStack = false;
  
      for (var i = 1; i < argTypes.length; ++i) { // Skip return value at index 0 - it's not deleted here.
        if (argTypes[i] !== null && argTypes[i].destructorFunction === undefined) { // The type does not define a destructor function - must use dynamic stack
          needsDestructorStack = true;
          break;
        }
      }
  
      var returns = (argTypes[0].name !== "void");
  
      var expectedArgCount = argCount - 2;
      var argsWired = new Array(expectedArgCount);
      var invokerFuncArgs = [];
      var destructors = [];
      return function() {
        if (arguments.length !== expectedArgCount) {
          throwBindingError(`function ${humanName} called with ${arguments.length} arguments, expected ${expectedArgCount} args!`);
        }
        destructors.length = 0;
        var thisWired;
        invokerFuncArgs.length = isClassMethodFunc ? 2 : 1;
        invokerFuncArgs[0] = cppTargetFunc;
        if (isClassMethodFunc) {
          thisWired = argTypes[1]['toWireType'](destructors, this);
          invokerFuncArgs[1] = thisWired;
        }
        for (var i = 0; i < expectedArgCount; ++i) {
          argsWired[i] = argTypes[i + 2]['toWireType'](destructors, arguments[i]);
          invokerFuncArgs.push(argsWired[i]);
        }
  
        var rv = cppInvokerFunc.apply(null, invokerFuncArgs);
  
        function onDone(rv) {
          if (needsDestructorStack) {
            runDestructors(destructors);
          } else {
            for (var i = isClassMethodFunc ? 1 : 2; i < argTypes.length; i++) {
              var param = i === 1 ? thisWired : argsWired[i - 2];
              if (argTypes[i].destructorFunction !== null) {
                argTypes[i].destructorFunction(param);
              }
            }
          }
  
          if (returns) {
            return argTypes[0]['fromWireType'](rv);
          }
        }
  
        return onDone(rv);
      };
    }
  function __embind_register_class_constructor(
      rawClassType,
      argCount,
      rawArgTypesAddr,
      invokerSignature,
      invoker,
      rawConstructor
    ) {
      assert(argCount > 0);
      var rawArgTypes = heap32VectorToArray(argCount, rawArgTypesAddr);
      invoker = embind__requireFunction(invokerSignature, invoker);
      var args = [rawConstructor];
      var destructors = [];
  
      whenDependentTypesAreResolved([], [rawClassType], function(classType) {
        classType = classType[0];
        var humanName = `constructor ${classType.name}`;
  
        if (undefined === classType.registeredClass.constructor_body) {
          classType.registeredClass.constructor_body = [];
        }
        if (undefined !== classType.registeredClass.constructor_body[argCount - 1]) {
          throw new BindingError(`Cannot register multiple constructors with identical number of parameters (${argCount-1}) for class '${classType.name}'! Overload resolution is currently only performed using the parameter count, not actual type info!`);
        }
        classType.registeredClass.constructor_body[argCount - 1] = () => {
          throwUnboundTypeError(`Cannot construct ${classType.name} due to unbound types`, rawArgTypes);
        };
  
        whenDependentTypesAreResolved([], rawArgTypes, function(argTypes) {
          // Insert empty slot for context type (argTypes[1]).
          argTypes.splice(1, 0, null);
          classType.registeredClass.constructor_body[argCount - 1] = craftInvokerFunction(humanName, argTypes, null, invoker, rawConstructor);
          return [];
        });
        return [];
      });
    }

  
  
  
  
  
  function __embind_register_class_function(rawClassType,
                                              methodName,
                                              argCount,
                                              rawArgTypesAddr, // [ReturnType, ThisType, Args...]
                                              invokerSignature,
                                              rawInvoker,
                                              context,
                                              isPureVirtual,
                                              isAsync) {
      var rawArgTypes = heap32VectorToArray(argCount, rawArgTypesAddr);
      methodName = readLatin1String(methodName);
      rawInvoker = embind__requireFunction(invokerSignature, rawInvoker);
  
      whenDependentTypesAreResolved([], [rawClassType], function(classType) {
        classType = classType[0];
        var humanName = `${classType.name}.${methodName}`;
  
        if (methodName.startsWith("@@")) {
          methodName = Symbol[methodName.substring(2)];
        }
  
        if (isPureVirtual) {
          classType.registeredClass.pureVirtualFunctions.push(methodName);
        }
  
        function unboundTypesHandler() {
          throwUnboundTypeError(`Cannot call ${humanName} due to unbound types`, rawArgTypes);
        }
  
        var proto = classType.registeredClass.instancePrototype;
        var method = proto[methodName];
        if (undefined === method || (undefined === method.overloadTable && method.className !== classType.name && method.argCount === argCount - 2)) {
          // This is the first overload to be registered, OR we are replacing a
          // function in the base class with a function in the derived class.
          unboundTypesHandler.argCount = argCount - 2;
          unboundTypesHandler.className = classType.name;
          proto[methodName] = unboundTypesHandler;
        } else {
          // There was an existing function with the same name registered. Set up
          // a function overload routing table.
          ensureOverloadTable(proto, methodName, humanName);
          proto[methodName].overloadTable[argCount - 2] = unboundTypesHandler;
        }
  
        whenDependentTypesAreResolved([], rawArgTypes, function(argTypes) {
          var memberFunction = craftInvokerFunction(humanName, argTypes, classType, rawInvoker, context, isAsync);
  
          // Replace the initial unbound-handler-stub function with the appropriate member function, now that all types
          // are resolved. If multiple overloads are registered for this function, the function goes into an overload table.
          if (undefined === proto[methodName].overloadTable) {
            // Set argCount in case an overload is registered later
            memberFunction.argCount = argCount - 2;
            proto[methodName] = memberFunction;
          } else {
            proto[methodName].overloadTable[argCount - 2] = memberFunction;
          }
  
          return [];
        });
        return [];
      });
    }

  /** @constructor */
  function HandleAllocator() {
      // Reserve slot 0 so that 0 is always an invalid handle
      this.allocated = [undefined];
      this.freelist = [];
      this.get = function(id) {
        assert(this.allocated[id] !== undefined, `invalid handle: ${id}`);
        return this.allocated[id];
      };
      this.has = function(id) {
        return this.allocated[id] !== undefined;
      };
      this.allocate = function(handle) {
        var id = this.freelist.pop() || this.allocated.length;
        this.allocated[id] = handle;
        return id;
      };
      this.free = function(id) {
        assert(this.allocated[id] !== undefined);
        // Set the slot to `undefined` rather than using `delete` here since
        // apparently arrays with holes in them can be less efficient.
        this.allocated[id] = undefined;
        this.freelist.push(id);
      };
    }
  var emval_handles = new HandleAllocator();;
  function __emval_decref(handle) {
      if (handle >= emval_handles.reserved && 0 === --emval_handles.get(handle).refcount) {
        emval_handles.free(handle);
      }
    }
  
  
  
  function count_emval_handles() {
      var count = 0;
      for (var i = emval_handles.reserved; i < emval_handles.allocated.length; ++i) {
        if (emval_handles.allocated[i] !== undefined) {
          ++count;
        }
      }
      return count;
    }
  
  function init_emval() {
      // reserve some special values. These never get de-allocated.
      // The HandleAllocator takes care of reserving zero.
      emval_handles.allocated.push(
        {value: undefined},
        {value: null},
        {value: true},
        {value: false},
      );
      emval_handles.reserved = emval_handles.allocated.length
      Module['count_emval_handles'] = count_emval_handles;
    }
  var Emval = {toValue:(handle) => {
        if (!handle) {
            throwBindingError('Cannot use deleted val. handle = ' + handle);
        }
        return emval_handles.get(handle).value;
      },toHandle:(value) => {
        switch (value) {
          case undefined: return 1;
          case null: return 2;
          case true: return 3;
          case false: return 4;
          default:{
            return emval_handles.allocate({refcount: 1, value: value});
          }
        }
      }};
  
  
  
  function __embind_register_emval(rawType, name) {
      name = readLatin1String(name);
      registerType(rawType, {
        name: name,
        'fromWireType': function(handle) {
          var rv = Emval.toValue(handle);
          __emval_decref(handle);
          return rv;
        },
        'toWireType': function(destructors, value) {
          return Emval.toHandle(value);
        },
        'argPackAdvance': 8,
        'readValueFromPointer': simpleReadValueFromPointer,
        destructorFunction: null, // This type does not need a destructor
  
        // TODO: do we need a deleteObject here?  write a test where
        // emval is passed into JS via an interface
      });
    }

  function embindRepr(v) {
      if (v === null) {
          return 'null';
      }
      var t = typeof v;
      if (t === 'object' || t === 'array' || t === 'function') {
          return v.toString();
      } else {
          return '' + v;
      }
    }
  
  function floatReadValueFromPointer(name, shift) {
      switch (shift) {
          case 2: return function(pointer) {
              return this['fromWireType'](HEAPF32[pointer >> 2]);
          };
          case 3: return function(pointer) {
              return this['fromWireType'](HEAPF64[pointer >> 3]);
          };
          default:
              throw new TypeError("Unknown float type: " + name);
      }
    }
  
  
  
  function __embind_register_float(rawType, name, size) {
      var shift = getShiftFromSize(size);
      name = readLatin1String(name);
      registerType(rawType, {
        name: name,
        'fromWireType': function(value) {
           return value;
        },
        'toWireType': function(destructors, value) {
          if (typeof value != "number" && typeof value != "boolean") {
            throw new TypeError(`Cannot convert ${embindRepr(value)} to ${this.name}`);
          }
          // The VM will perform JS to Wasm value conversion, according to the spec:
          // https://www.w3.org/TR/wasm-js-api-1/#towebassemblyvalue
          return value;
        },
        'argPackAdvance': 8,
        'readValueFromPointer': floatReadValueFromPointer(name, shift),
        destructorFunction: null, // This type does not need a destructor
      });
    }

  
  
  
  
  
  
  
  function __embind_register_function(name, argCount, rawArgTypesAddr, signature, rawInvoker, fn, isAsync) {
      var argTypes = heap32VectorToArray(argCount, rawArgTypesAddr);
      name = readLatin1String(name);
  
      rawInvoker = embind__requireFunction(signature, rawInvoker);
  
      exposePublicSymbol(name, function() {
        throwUnboundTypeError(`Cannot call ${name} due to unbound types`, argTypes);
      }, argCount - 1);
  
      whenDependentTypesAreResolved([], argTypes, function(argTypes) {
        var invokerArgsArray = [argTypes[0] /* return value */, null /* no class 'this'*/].concat(argTypes.slice(1) /* actual params */);
        replacePublicSymbol(name, craftInvokerFunction(name, invokerArgsArray, null /* no class 'this'*/, rawInvoker, fn, isAsync), argCount - 1);
        return [];
      });
    }

  
  
  function integerReadValueFromPointer(name, shift, signed) {
      // integers are quite common, so generate very specialized functions
      switch (shift) {
          case 0: return signed ?
              function readS8FromPointer(pointer) { return HEAP8[pointer]; } :
              function readU8FromPointer(pointer) { return HEAPU8[pointer]; };
          case 1: return signed ?
              function readS16FromPointer(pointer) { return HEAP16[pointer >> 1]; } :
              function readU16FromPointer(pointer) { return HEAPU16[pointer >> 1]; };
          case 2: return signed ?
              function readS32FromPointer(pointer) { return HEAP32[pointer >> 2]; } :
              function readU32FromPointer(pointer) { return HEAPU32[pointer >> 2]; };
          default:
              throw new TypeError("Unknown integer type: " + name);
      }
    }
  
  
  function __embind_register_integer(primitiveType, name, size, minRange, maxRange) {
      name = readLatin1String(name);
      // LLVM doesn't have signed and unsigned 32-bit types, so u32 literals come
      // out as 'i32 -1'. Always treat those as max u32.
      if (maxRange === -1) {
          maxRange = 4294967295;
      }
  
      var shift = getShiftFromSize(size);
  
      var fromWireType = (value) => value;
  
      if (minRange === 0) {
          var bitshift = 32 - 8*size;
          fromWireType = (value) => (value << bitshift) >>> bitshift;
      }
  
      var isUnsignedType = (name.includes('unsigned'));
      var checkAssertions = (value, toTypeName) => {
        if (typeof value != "number" && typeof value != "boolean") {
          throw new TypeError(`Cannot convert "${embindRepr(value)}" to ${toTypeName}`);
        }
        if (value < minRange || value > maxRange) {
          throw new TypeError(`Passing a number "${embindRepr(value)}" from JS side to C/C++ side to an argument of type "${name}", which is outside the valid range [${minRange}, ${maxRange}]!`);
        }
      }
      var toWireType;
      if (isUnsignedType) {
        toWireType = function(destructors, value) {
          checkAssertions(value, this.name);
          return value >>> 0;
        }
      } else {
        toWireType = function(destructors, value) {
          checkAssertions(value, this.name);
          // The VM will perform JS to Wasm value conversion, according to the spec:
          // https://www.w3.org/TR/wasm-js-api-1/#towebassemblyvalue
          return value;
        }
      }
      registerType(primitiveType, {
        name: name,
        'fromWireType': fromWireType,
        'toWireType': toWireType,
        'argPackAdvance': 8,
        'readValueFromPointer': integerReadValueFromPointer(name, shift, minRange !== 0),
        destructorFunction: null, // This type does not need a destructor
      });
    }

  
  function __embind_register_memory_view(rawType, dataTypeIndex, name) {
      var typeMapping = [
        Int8Array,
        Uint8Array,
        Int16Array,
        Uint16Array,
        Int32Array,
        Uint32Array,
        Float32Array,
        Float64Array,
      ];
  
      var TA = typeMapping[dataTypeIndex];
  
      function decodeMemoryView(handle) {
        handle = handle >> 2;
        var heap = HEAPU32;
        var size = heap[handle]; // in elements
        var data = heap[handle + 1]; // byte offset into emscripten heap
        return new TA(heap.buffer, data, size);
      }
  
      name = readLatin1String(name);
      registerType(rawType, {
        name: name,
        'fromWireType': decodeMemoryView,
        'argPackAdvance': 8,
        'readValueFromPointer': decodeMemoryView,
      }, {
        ignoreDuplicateRegistrations: true,
      });
    }

  
  
  
  
  
  
  
  
  function __embind_register_std_string(rawType, name) {
      name = readLatin1String(name);
      var stdStringIsUTF8
      //process only std::string bindings with UTF8 support, in contrast to e.g. std::basic_string<unsigned char>
      = (name === "std::string");
  
      registerType(rawType, {
        name: name,
        'fromWireType': function(value) {
          var length = HEAPU32[((value)>>2)];
          var payload = value + 4;
  
          var str;
          if (stdStringIsUTF8) {
            var decodeStartPtr = payload;
            // Looping here to support possible embedded '0' bytes
            for (var i = 0; i <= length; ++i) {
              var currentBytePtr = payload + i;
              if (i == length || HEAPU8[currentBytePtr] == 0) {
                var maxRead = currentBytePtr - decodeStartPtr;
                var stringSegment = UTF8ToString(decodeStartPtr, maxRead);
                if (str === undefined) {
                  str = stringSegment;
                } else {
                  str += String.fromCharCode(0);
                  str += stringSegment;
                }
                decodeStartPtr = currentBytePtr + 1;
              }
            }
          } else {
            var a = new Array(length);
            for (var i = 0; i < length; ++i) {
              a[i] = String.fromCharCode(HEAPU8[payload + i]);
            }
            str = a.join('');
          }
  
          _free(value);
  
          return str;
        },
        'toWireType': function(destructors, value) {
          if (value instanceof ArrayBuffer) {
            value = new Uint8Array(value);
          }
  
          var length;
          var valueIsOfTypeString = (typeof value == 'string');
  
          if (!(valueIsOfTypeString || value instanceof Uint8Array || value instanceof Uint8ClampedArray || value instanceof Int8Array)) {
            throwBindingError('Cannot pass non-string to std::string');
          }
          if (stdStringIsUTF8 && valueIsOfTypeString) {
            length = lengthBytesUTF8(value);
          } else {
            length = value.length;
          }
  
          // assumes 4-byte alignment
          var base = _malloc(4 + length + 1);
          var ptr = base + 4;
          HEAPU32[((base)>>2)] = length;
          if (stdStringIsUTF8 && valueIsOfTypeString) {
            stringToUTF8(value, ptr, length + 1);
          } else {
            if (valueIsOfTypeString) {
              for (var i = 0; i < length; ++i) {
                var charCode = value.charCodeAt(i);
                if (charCode > 255) {
                  _free(ptr);
                  throwBindingError('String has UTF-16 code units that do not fit in 8 bits');
                }
                HEAPU8[ptr + i] = charCode;
              }
            } else {
              for (var i = 0; i < length; ++i) {
                HEAPU8[ptr + i] = value[i];
              }
            }
          }
  
          if (destructors !== null) {
            destructors.push(_free, base);
          }
          return base;
        },
        'argPackAdvance': 8,
        'readValueFromPointer': simpleReadValueFromPointer,
        destructorFunction: function(ptr) { _free(ptr); },
      });
    }

  
  
  
  var UTF16Decoder = typeof TextDecoder != 'undefined' ? new TextDecoder('utf-16le') : undefined;;
  function UTF16ToString(ptr, maxBytesToRead) {
      assert(ptr % 2 == 0, 'Pointer passed to UTF16ToString must be aligned to two bytes!');
      var endPtr = ptr;
      // 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.
      var idx = endPtr >> 1;
      var maxIdx = idx + maxBytesToRead / 2;
      // If maxBytesToRead is not passed explicitly, it will be undefined, and this
      // will always evaluate to true. This saves on code size.
      while (!(idx >= maxIdx) && HEAPU16[idx]) ++idx;
      endPtr = idx << 1;
  
      if (endPtr - ptr > 32 && UTF16Decoder)
        return UTF16Decoder.decode(HEAPU8.subarray(ptr, endPtr));
  
      // Fallback: decode without UTF16Decoder
      var str = '';
  
      // If maxBytesToRead is not passed explicitly, it will be undefined, and the
      // for-loop's condition will always evaluate to true. The loop is then
      // terminated on the first null char.
      for (var i = 0; !(i >= maxBytesToRead / 2); ++i) {
        var codeUnit = HEAP16[(((ptr)+(i*2))>>1)];
        if (codeUnit == 0) break;
        // fromCharCode constructs a character from a UTF-16 code unit, so we can
        // pass the UTF16 string right through.
        str += String.fromCharCode(codeUnit);
      }
  
      return str;
    }
  
  function stringToUTF16(str, outPtr, maxBytesToWrite) {
      assert(outPtr % 2 == 0, 'Pointer passed to stringToUTF16 must be aligned to two bytes!');
      assert(typeof maxBytesToWrite == 'number', 'stringToUTF16(str, outPtr, maxBytesToWrite) is missing the third parameter that specifies the length of the output buffer!');
      // Backwards compatibility: if max bytes is not specified, assume unsafe unbounded write is allowed.
      if (maxBytesToWrite === undefined) {
        maxBytesToWrite = 0x7FFFFFFF;
      }
      if (maxBytesToWrite < 2) return 0;
      maxBytesToWrite -= 2; // Null terminator.
      var startPtr = outPtr;
      var numCharsToWrite = (maxBytesToWrite < str.length*2) ? (maxBytesToWrite / 2) : str.length;
      for (var i = 0; i < numCharsToWrite; ++i) {
        // charCodeAt returns a UTF-16 encoded code unit, so it can be directly written to the HEAP.
        var codeUnit = str.charCodeAt(i); // possibly a lead surrogate
        HEAP16[((outPtr)>>1)] = codeUnit;
        outPtr += 2;
      }
      // Null-terminate the pointer to the HEAP.
      HEAP16[((outPtr)>>1)] = 0;
      return outPtr - startPtr;
    }
  
  function lengthBytesUTF16(str) {
      return str.length*2;
    }
  
  function UTF32ToString(ptr, maxBytesToRead) {
      assert(ptr % 4 == 0, 'Pointer passed to UTF32ToString must be aligned to four bytes!');
      var i = 0;
  
      var str = '';
      // If maxBytesToRead is not passed explicitly, it will be undefined, and this
      // will always evaluate to true. This saves on code size.
      while (!(i >= maxBytesToRead / 4)) {
        var utf32 = HEAP32[(((ptr)+(i*4))>>2)];
        if (utf32 == 0) break;
        ++i;
        // Gotcha: fromCharCode constructs a character from a UTF-16 encoded code (pair), not from a Unicode code point! So encode the code point to UTF-16 for constructing.
        // See http://unicode.org/faq/utf_bom.html#utf16-3
        if (utf32 >= 0x10000) {
          var ch = utf32 - 0x10000;
          str += String.fromCharCode(0xD800 | (ch >> 10), 0xDC00 | (ch & 0x3FF));
        } else {
          str += String.fromCharCode(utf32);
        }
      }
      return str;
    }
  
  function stringToUTF32(str, outPtr, maxBytesToWrite) {
      assert(outPtr % 4 == 0, 'Pointer passed to stringToUTF32 must be aligned to four bytes!');
      assert(typeof maxBytesToWrite == 'number', 'stringToUTF32(str, outPtr, maxBytesToWrite) is missing the third parameter that specifies the length of the output buffer!');
      // Backwards compatibility: if max bytes is not specified, assume unsafe unbounded write is allowed.
      if (maxBytesToWrite === undefined) {
        maxBytesToWrite = 0x7FFFFFFF;
      }
      if (maxBytesToWrite < 4) return 0;
      var startPtr = outPtr;
      var endPtr = startPtr + maxBytesToWrite - 4;
      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! We must decode the string to UTF-32 to the heap.
        // See http://unicode.org/faq/utf_bom.html#utf16-3
        var codeUnit = str.charCodeAt(i); // possibly a lead surrogate
        if (codeUnit >= 0xD800 && codeUnit <= 0xDFFF) {
          var trailSurrogate = str.charCodeAt(++i);
          codeUnit = 0x10000 + ((codeUnit & 0x3FF) << 10) | (trailSurrogate & 0x3FF);
        }
        HEAP32[((outPtr)>>2)] = codeUnit;
        outPtr += 4;
        if (outPtr + 4 > endPtr) break;
      }
      // Null-terminate the pointer to the HEAP.
      HEAP32[((outPtr)>>2)] = 0;
      return outPtr - startPtr;
    }
  
  function lengthBytesUTF32(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! We must decode the string to UTF-32 to the heap.
        // See http://unicode.org/faq/utf_bom.html#utf16-3
        var codeUnit = str.charCodeAt(i);
        if (codeUnit >= 0xD800 && codeUnit <= 0xDFFF) ++i; // possibly a lead surrogate, so skip over the tail surrogate.
        len += 4;
      }
  
      return len;
    }
  function __embind_register_std_wstring(rawType, charSize, name) {
      name = readLatin1String(name);
      var decodeString, encodeString, getHeap, lengthBytesUTF, shift;
      if (charSize === 2) {
        decodeString = UTF16ToString;
        encodeString = stringToUTF16;
        lengthBytesUTF = lengthBytesUTF16;
        getHeap = () => HEAPU16;
        shift = 1;
      } else if (charSize === 4) {
        decodeString = UTF32ToString;
        encodeString = stringToUTF32;
        lengthBytesUTF = lengthBytesUTF32;
        getHeap = () => HEAPU32;
        shift = 2;
      }
      registerType(rawType, {
        name: name,
        'fromWireType': function(value) {
          // Code mostly taken from _embind_register_std_string fromWireType
          var length = HEAPU32[value >> 2];
          var HEAP = getHeap();
          var str;
  
          var decodeStartPtr = value + 4;
          // Looping here to support possible embedded '0' bytes
          for (var i = 0; i <= length; ++i) {
            var currentBytePtr = value + 4 + i * charSize;
            if (i == length || HEAP[currentBytePtr >> shift] == 0) {
              var maxReadBytes = currentBytePtr - decodeStartPtr;
              var stringSegment = decodeString(decodeStartPtr, maxReadBytes);
              if (str === undefined) {
                str = stringSegment;
              } else {
                str += String.fromCharCode(0);
                str += stringSegment;
              }
              decodeStartPtr = currentBytePtr + charSize;
            }
          }
  
          _free(value);
  
          return str;
        },
        'toWireType': function(destructors, value) {
          if (!(typeof value == 'string')) {
            throwBindingError(`Cannot pass non-string to C++ string type ${name}`);
          }
  
          // assumes 4-byte alignment
          var length = lengthBytesUTF(value);
          var ptr = _malloc(4 + length + charSize);
          HEAPU32[ptr >> 2] = length >> shift;
  
          encodeString(value, ptr + 4, length + charSize);
  
          if (destructors !== null) {
            destructors.push(_free, ptr);
          }
          return ptr;
        },
        'argPackAdvance': 8,
        'readValueFromPointer': simpleReadValueFromPointer,
        destructorFunction: function(ptr) { _free(ptr); },
      });
    }

  
  function __embind_register_void(rawType, name) {
      name = readLatin1String(name);
      registerType(rawType, {
          isVoid: true, // void return values can be optimized out sometimes
          name: name,
          'argPackAdvance': 0,
          'fromWireType': function() {
              return undefined;
          },
          'toWireType': function(destructors, o) {
              // TODO: assert if anything else is given?
              return undefined;
          },
      });
    }


  function __emval_incref(handle) {
      if (handle > 4) {
        emval_handles.get(handle).refcount += 1;
      }
    }

  
  
  
  function requireRegisteredType(rawType, humanName) {
      var impl = registeredTypes[rawType];
      if (undefined === impl) {
          throwBindingError(humanName + " has unknown type " + getTypeName(rawType));
      }
      return impl;
    }
  function __emval_take_value(type, arg) {
      type = requireRegisteredType(type, '_emval_take_value');
      var v = type['readValueFromPointer'](arg);
      return Emval.toHandle(v);
    }

  
  
  
  
  function __mmap_js(len, prot, flags, fd, off, allocated, addr) {
  try {
  
      var stream = SYSCALLS.getStreamFromFD(fd);
      var res = FS.mmap(stream, len, off, prot, flags);
      var ptr = res.ptr;
      HEAP32[((allocated)>>2)] = res.allocated;
      HEAPU32[((addr)>>2)] = ptr;
      return 0;
    } catch (e) {
    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
    return -e.errno;
  }
  }

  
  
  function __munmap_js(addr, len, prot, flags, fd, offset) {
  try {
  
      var stream = SYSCALLS.getStreamFromFD(fd);
      if (prot & 2) {
        SYSCALLS.doMsync(addr, stream, len, flags, offset);
      }
      FS.munmap(stream);
      // implicitly return 0
    } catch (e) {
    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
    return -e.errno;
  }
  }

  function _abort() {
      abort('native code called abort()');
    }

  function _emscripten_console_error(str) {
      assert(typeof str == 'number');
      console.error(UTF8ToString(str));
    }

  function _emscripten_memcpy_big(dest, src, num) {
      HEAPU8.copyWithin(dest, src, src + num);
    }

  function getHeapMax() {
      // Stay one Wasm page short of 4GB: while e.g. Chrome is able to allocate
      // full 4GB Wasm memories, the size will wrap back to 0 bytes in Wasm side
      // for any code that deals with heap sizes, which would require special
      // casing all heap size related code to treat 0 specially.
      return 2147483648;
    }
  
  function emscripten_realloc_buffer(size) {
      var b = wasmMemory.buffer;
      var pages = (size - b.byteLength + 65535) >>> 16;
      dbg(`emscripten_resize_heap: ${size} (+${size - b.byteLength} bytes / ${pages} pages)`);
      try {
        // round size grow request up to wasm page size (fixed 64KB per spec)
        wasmMemory.grow(pages); // .grow() takes a delta compared to the previous size
        updateMemoryViews();
        return 1 /*success*/;
      } catch(e) {
        err(`emscripten_realloc_buffer: Attempted to grow heap from ${b.byteLength} bytes to ${size} bytes, but got error: ${e}`);
      }
      // implicit 0 return to save code size (caller will cast "undefined" into 0
      // anyhow)
    }
  function _emscripten_resize_heap(requestedSize) {
      var oldSize = HEAPU8.length;
      requestedSize = requestedSize >>> 0;
      // With multithreaded builds, races can happen (another thread might increase the size
      // in between), so return a failure, and let the caller retry.
      assert(requestedSize > oldSize);
  
      // Memory resize rules:
      // 1.  Always increase heap size to at least the requested size, rounded up
      //     to next page multiple.
      // 2a. If MEMORY_GROWTH_LINEAR_STEP == -1, excessively resize the heap
      //     geometrically: increase the heap size according to
      //     MEMORY_GROWTH_GEOMETRIC_STEP factor (default +20%), At most
      //     overreserve by MEMORY_GROWTH_GEOMETRIC_CAP bytes (default 96MB).
      // 2b. If MEMORY_GROWTH_LINEAR_STEP != -1, excessively resize the heap
      //     linearly: increase the heap size by at least
      //     MEMORY_GROWTH_LINEAR_STEP bytes.
      // 3.  Max size for the heap is capped at 2048MB-WASM_PAGE_SIZE, or by
      //     MAXIMUM_MEMORY, or by ASAN limit, depending on which is smallest
      // 4.  If we were unable to allocate as much memory, it may be due to
      //     over-eager decision to excessively reserve due to (3) above.
      //     Hence if an allocation fails, cut down on the amount of excess
      //     growth, in an attempt to succeed to perform a smaller allocation.
  
      // A limit is set for how much we can grow. We should not exceed that
      // (the wasm binary specifies it, so if we tried, we'd fail anyhow).
      var maxHeapSize = getHeapMax();
      if (requestedSize > maxHeapSize) {
        err(`Cannot enlarge memory, asked to go up to ${requestedSize} bytes, but the limit is ${maxHeapSize} bytes!`);
        return false;
      }
  
      var alignUp = (x, multiple) => x + (multiple - x % multiple) % multiple;
  
      // Loop through potential heap size increases. If we attempt a too eager
      // reservation that fails, cut down on the attempted size and reserve a
      // smaller bump instead. (max 3 times, chosen somewhat arbitrarily)
      for (var cutDown = 1; cutDown <= 4; cutDown *= 2) {
        var overGrownHeapSize = oldSize * (1 + 0.2 / cutDown); // ensure geometric growth
        // but limit overreserving (default to capping at +96MB overgrowth at most)
        overGrownHeapSize = Math.min(overGrownHeapSize, requestedSize + 100663296 );
  
        var newSize = Math.min(maxHeapSize, alignUp(Math.max(requestedSize, overGrownHeapSize), 65536));
  
        var replacement = emscripten_realloc_buffer(newSize);
        if (replacement) {
  
          return true;
        }
      }
      err(`Failed to grow the heap from ${oldSize} bytes to ${newSize} bytes, not enough memory!`);
      return false;
    }

  var ENV = {};
  
  function getExecutableName() {
      return thisProgram || './this.program';
    }
  function 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;
    }
  
  function 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;
    }
  
  function _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;
    }

  
  function _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 */
  function 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 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_pread(fd, iov, iovcnt, offset_low, offset_high, pnum) {
  try {
  
      var offset = convertI32PairToI53Checked(offset_low, offset_high); if (isNaN(offset)) return 61;
      var stream = SYSCALLS.getStreamFromFD(fd)
      var num = doReadv(stream, iov, iovcnt, offset);
      HEAPU32[((pnum)>>2)] = num;
      return 0;
    } catch (e) {
    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
    return e.errno;
  }
  }

  /** @param {number=} offset */
  function 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_pwrite(fd, iov, iovcnt, offset_low, offset_high, pnum) {
  try {
  
      var offset = convertI32PairToI53Checked(offset_low, offset_high); if (isNaN(offset)) return 61;
      var stream = SYSCALLS.getStreamFromFD(fd)
      var num = doWritev(stream, iov, iovcnt, offset);
      HEAPU32[((pnum)>>2)] = num;
      return 0;
    } catch (e) {
    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
    return e.errno;
  }
  }

  
  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 _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;
  }
  }

  
  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;
  }
  }

  function _llvm_eh_typeid_for(type) {
      return type;
    }

  function isLeapYear(year) {
        return year%4 === 0 && (year%100 !== 0 || year%400 === 0);
    }
  
  function arraySum(array, index) {
      var sum = 0;
      for (var i = 0; i <= index; sum += array[i++]) {
        // no-op
      }
      return sum;
    }
  
  
  var MONTH_DAYS_LEAP = [31,29,31,30,31,30,31,31,30,31,30,31];
  
  var MONTH_DAYS_REGULAR = [31,28,31,30,31,30,31,31,30,31,30,31];
  function addDays(date, days) {
      var newDate = new Date(date.getTime());
      while (days > 0) {
        var leap = isLeapYear(newDate.getFullYear());
        var currentMonth = newDate.getMonth();
        var daysInCurrentMonth = (leap ? MONTH_DAYS_LEAP : MONTH_DAYS_REGULAR)[currentMonth];
  
        if (days > daysInCurrentMonth-newDate.getDate()) {
          // we spill over to next month
          days -= (daysInCurrentMonth-newDate.getDate()+1);
          newDate.setDate(1);
          if (currentMonth < 11) {
            newDate.setMonth(currentMonth+1)
          } else {
            newDate.setMonth(0);
            newDate.setFullYear(newDate.getFullYear()+1);
          }
        } else {
          // we stay in current month
          newDate.setDate(newDate.getDate()+days);
          return newDate;
        }
      }
  
      return newDate;
    }
  
  
  
  
  function writeArrayToMemory(array, buffer) {
      assert(array.length >= 0, 'writeArrayToMemory array must have a length (should be an array or typed array)')
      HEAP8.set(array, buffer);
    }
  
  function _strftime(s, maxsize, format, tm) {
      // size_t strftime(char *restrict s, size_t maxsize, const char *restrict format, const struct tm *restrict timeptr);
      // http://pubs.opengroup.org/onlinepubs/009695399/functions/strftime.html
  
      var tm_zone = HEAP32[(((tm)+(40))>>2)];
  
      var date = {
        tm_sec: HEAP32[((tm)>>2)],
        tm_min: HEAP32[(((tm)+(4))>>2)],
        tm_hour: HEAP32[(((tm)+(8))>>2)],
        tm_mday: HEAP32[(((tm)+(12))>>2)],
        tm_mon: HEAP32[(((tm)+(16))>>2)],
        tm_year: HEAP32[(((tm)+(20))>>2)],
        tm_wday: HEAP32[(((tm)+(24))>>2)],
        tm_yday: HEAP32[(((tm)+(28))>>2)],
        tm_isdst: HEAP32[(((tm)+(32))>>2)],
        tm_gmtoff: HEAP32[(((tm)+(36))>>2)],
        tm_zone: tm_zone ? UTF8ToString(tm_zone) : ''
      };
  
      var pattern = UTF8ToString(format);
  
      // expand format
      var EXPANSION_RULES_1 = {
        '%c': '%a %b %d %H:%M:%S %Y',     // Replaced by the locale's appropriate date and time representation - e.g., Mon Aug  3 14:02:01 2013
        '%D': '%m/%d/%y',                 // Equivalent to %m / %d / %y
        '%F': '%Y-%m-%d',                 // Equivalent to %Y - %m - %d
        '%h': '%b',                       // Equivalent to %b
        '%r': '%I:%M:%S %p',              // Replaced by the time in a.m. and p.m. notation
        '%R': '%H:%M',                    // Replaced by the time in 24-hour notation
        '%T': '%H:%M:%S',                 // Replaced by the time
        '%x': '%m/%d/%y',                 // Replaced by the locale's appropriate date representation
        '%X': '%H:%M:%S',                 // Replaced by the locale's appropriate time representation
        // Modified Conversion Specifiers
        '%Ec': '%c',                      // Replaced by the locale's alternative appropriate date and time representation.
        '%EC': '%C',                      // Replaced by the name of the base year (period) in the locale's alternative representation.
        '%Ex': '%m/%d/%y',                // Replaced by the locale's alternative date representation.
        '%EX': '%H:%M:%S',                // Replaced by the locale's alternative time representation.
        '%Ey': '%y',                      // Replaced by the offset from %EC (year only) in the locale's alternative representation.
        '%EY': '%Y',                      // Replaced by the full alternative year representation.
        '%Od': '%d',                      // Replaced by the day of the month, using the locale's alternative numeric symbols, filled as needed with leading zeros if there is any alternative symbol for zero; otherwise, with leading <space> characters.
        '%Oe': '%e',                      // Replaced by the day of the month, using the locale's alternative numeric symbols, filled as needed with leading <space> characters.
        '%OH': '%H',                      // Replaced by the hour (24-hour clock) using the locale's alternative numeric symbols.
        '%OI': '%I',                      // Replaced by the hour (12-hour clock) using the locale's alternative numeric symbols.
        '%Om': '%m',                      // Replaced by the month using the locale's alternative numeric symbols.
        '%OM': '%M',                      // Replaced by the minutes using the locale's alternative numeric symbols.
        '%OS': '%S',                      // Replaced by the seconds using the locale's alternative numeric symbols.
        '%Ou': '%u',                      // Replaced by the weekday as a number in the locale's alternative representation (Monday=1).
        '%OU': '%U',                      // Replaced by the week number of the year (Sunday as the first day of the week, rules corresponding to %U ) using the locale's alternative numeric symbols.
        '%OV': '%V',                      // Replaced by the week number of the year (Monday as the first day of the week, rules corresponding to %V ) using the locale's alternative numeric symbols.
        '%Ow': '%w',                      // Replaced by the number of the weekday (Sunday=0) using the locale's alternative numeric symbols.
        '%OW': '%W',                      // Replaced by the week number of the year (Monday as the first day of the week) using the locale's alternative numeric symbols.
        '%Oy': '%y',                      // Replaced by the year (offset from %C ) using the locale's alternative numeric symbols.
      };
      for (var rule in EXPANSION_RULES_1) {
        pattern = pattern.replace(new RegExp(rule, 'g'), EXPANSION_RULES_1[rule]);
      }
  
      var WEEKDAYS = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'];
      var MONTHS = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'];
  
      function leadingSomething(value, digits, character) {
        var str = typeof value == 'number' ? value.toString() : (value || '');
        while (str.length < digits) {
          str = character[0]+str;
        }
        return str;
      }
  
      function leadingNulls(value, digits) {
        return leadingSomething(value, digits, '0');
      }
  
      function compareByDay(date1, date2) {
        function sgn(value) {
          return value < 0 ? -1 : (value > 0 ? 1 : 0);
        }
  
        var compare;
        if ((compare = sgn(date1.getFullYear()-date2.getFullYear())) === 0) {
          if ((compare = sgn(date1.getMonth()-date2.getMonth())) === 0) {
            compare = sgn(date1.getDate()-date2.getDate());
          }
        }
        return compare;
      }
  
      function getFirstWeekStartDate(janFourth) {
          switch (janFourth.getDay()) {
            case 0: // Sunday
              return new Date(janFourth.getFullYear()-1, 11, 29);
            case 1: // Monday
              return janFourth;
            case 2: // Tuesday
              return new Date(janFourth.getFullYear(), 0, 3);
            case 3: // Wednesday
              return new Date(janFourth.getFullYear(), 0, 2);
            case 4: // Thursday
              return new Date(janFourth.getFullYear(), 0, 1);
            case 5: // Friday
              return new Date(janFourth.getFullYear()-1, 11, 31);
            case 6: // Saturday
              return new Date(janFourth.getFullYear()-1, 11, 30);
          }
      }
  
      function getWeekBasedYear(date) {
          var thisDate = addDays(new Date(date.tm_year+1900, 0, 1), date.tm_yday);
  
          var janFourthThisYear = new Date(thisDate.getFullYear(), 0, 4);
          var janFourthNextYear = new Date(thisDate.getFullYear()+1, 0, 4);
  
          var firstWeekStartThisYear = getFirstWeekStartDate(janFourthThisYear);
          var firstWeekStartNextYear = getFirstWeekStartDate(janFourthNextYear);
  
          if (compareByDay(firstWeekStartThisYear, thisDate) <= 0) {
            // this date is after the start of the first week of this year
            if (compareByDay(firstWeekStartNextYear, thisDate) <= 0) {
              return thisDate.getFullYear()+1;
            }
            return thisDate.getFullYear();
          }
          return thisDate.getFullYear()-1;
      }
  
      var EXPANSION_RULES_2 = {
        '%a': function(date) {
          return WEEKDAYS[date.tm_wday].substring(0,3);
        },
        '%A': function(date) {
          return WEEKDAYS[date.tm_wday];
        },
        '%b': function(date) {
          return MONTHS[date.tm_mon].substring(0,3);
        },
        '%B': function(date) {
          return MONTHS[date.tm_mon];
        },
        '%C': function(date) {
          var year = date.tm_year+1900;
          return leadingNulls((year/100)|0,2);
        },
        '%d': function(date) {
          return leadingNulls(date.tm_mday, 2);
        },
        '%e': function(date) {
          return leadingSomething(date.tm_mday, 2, ' ');
        },
        '%g': function(date) {
          // %g, %G, and %V give values according to the ISO 8601:2000 standard week-based year.
          // In this system, weeks begin on a Monday and week 1 of the year is the week that includes
          // January 4th, which is also the week that includes the first Thursday of the year, and
          // is also the first week that contains at least four days in the year.
          // If the first Monday of January is the 2nd, 3rd, or 4th, the preceding days are part of
          // the last week of the preceding year; thus, for Saturday 2nd January 1999,
          // %G is replaced by 1998 and %V is replaced by 53. If December 29th, 30th,
          // or 31st is a Monday, it and any following days are part of week 1 of the following year.
          // Thus, for Tuesday 30th December 1997, %G is replaced by 1998 and %V is replaced by 01.
  
          return getWeekBasedYear(date).toString().substring(2);
        },
        '%G': function(date) {
          return getWeekBasedYear(date);
        },
        '%H': function(date) {
          return leadingNulls(date.tm_hour, 2);
        },
        '%I': function(date) {
          var twelveHour = date.tm_hour;
          if (twelveHour == 0) twelveHour = 12;
          else if (twelveHour > 12) twelveHour -= 12;
          return leadingNulls(twelveHour, 2);
        },
        '%j': function(date) {
          // Day of the year (001-366)
          return leadingNulls(date.tm_mday + arraySum(isLeapYear(date.tm_year+1900) ? MONTH_DAYS_LEAP : MONTH_DAYS_REGULAR, date.tm_mon-1), 3);
        },
        '%m': function(date) {
          return leadingNulls(date.tm_mon+1, 2);
        },
        '%M': function(date) {
          return leadingNulls(date.tm_min, 2);
        },
        '%n': function() {
          return '\n';
        },
        '%p': function(date) {
          if (date.tm_hour >= 0 && date.tm_hour < 12) {
            return 'AM';
          }
          return 'PM';
        },
        '%S': function(date) {
          return leadingNulls(date.tm_sec, 2);
        },
        '%t': function() {
          return '\t';
        },
        '%u': function(date) {
          return date.tm_wday || 7;
        },
        '%U': function(date) {
          var days = date.tm_yday + 7 - date.tm_wday;
          return leadingNulls(Math.floor(days / 7), 2);
        },
        '%V': function(date) {
          // Replaced by the week number of the year (Monday as the first day of the week)
          // as a decimal number [01,53]. If the week containing 1 January has four
          // or more days in the new year, then it is considered week 1.
          // Otherwise, it is the last week of the previous year, and the next week is week 1.
          // Both January 4th and the first Thursday of January are always in week 1. [ tm_year, tm_wday, tm_yday]
          var val = Math.floor((date.tm_yday + 7 - (date.tm_wday + 6) % 7 ) / 7);
          // If 1 Jan is just 1-3 days past Monday, the previous week
          // is also in this year.
          if ((date.tm_wday + 371 - date.tm_yday - 2) % 7 <= 2) {
            val++;
          }
          if (!val) {
            val = 52;
            // If 31 December of prev year a Thursday, or Friday of a
            // leap year, then the prev year has 53 weeks.
            var dec31 = (date.tm_wday + 7 - date.tm_yday - 1) % 7;
            if (dec31 == 4 || (dec31 == 5 && isLeapYear(date.tm_year%400-1))) {
              val++;
            }
          } else if (val == 53) {
            // If 1 January is not a Thursday, and not a Wednesday of a
            // leap year, then this year has only 52 weeks.
            var jan1 = (date.tm_wday + 371 - date.tm_yday) % 7;
            if (jan1 != 4 && (jan1 != 3 || !isLeapYear(date.tm_year)))
              val = 1;
          }
          return leadingNulls(val, 2);
        },
        '%w': function(date) {
          return date.tm_wday;
        },
        '%W': function(date) {
          var days = date.tm_yday + 7 - ((date.tm_wday + 6) % 7);
          return leadingNulls(Math.floor(days / 7), 2);
        },
        '%y': function(date) {
          // Replaced by the last two digits of the year as a decimal number [00,99]. [ tm_year]
          return (date.tm_year+1900).toString().substring(2);
        },
        '%Y': function(date) {
          // Replaced by the year as a decimal number (for example, 1997). [ tm_year]
          return date.tm_year+1900;
        },
        '%z': function(date) {
          // Replaced by the offset from UTC in the ISO 8601:2000 standard format ( +hhmm or -hhmm ).
          // For example, "-0430" means 4 hours 30 minutes behind UTC (west of Greenwich).
          var off = date.tm_gmtoff;
          var ahead = off >= 0;
          off = Math.abs(off) / 60;
          // convert from minutes into hhmm format (which means 60 minutes = 100 units)
          off = (off / 60)*100 + (off % 60);
          return (ahead ? '+' : '-') + String("0000" + off).slice(-4);
        },
        '%Z': function(date) {
          return date.tm_zone;
        },
        '%%': function() {
          return '%';
        }
      };
  
      // Replace %% with a pair of NULLs (which cannot occur in a C string), then
      // re-inject them after processing.
      pattern = pattern.replace(/%%/g, '\0\0')
      for (var rule in EXPANSION_RULES_2) {
        if (pattern.includes(rule)) {
          pattern = pattern.replace(new RegExp(rule, 'g'), EXPANSION_RULES_2[rule](date));
        }
      }
      pattern = pattern.replace(/\0\0/g, '%')
  
      var bytes = intArrayFromString(pattern, false);
      if (bytes.length > maxsize) {
        return 0;
      }
  
      writeArrayToMemory(bytes, s);
      return bytes.length-1;
    }
  function _strftime_l(s, maxsize, format, tm, loc) {
      return _strftime(s, maxsize, format, tm); // no locale support yet
    }

  
  function _proc_exit(code) {
      dbg(`proc_exit: ${code}`);
      EXITSTATUS = code;
      if (!keepRuntimeAlive()) {
        if (Module['onExit']) Module['onExit'](code);
        ABORT = true;
      }
      quit_(code, new ExitStatus(code));
    }
  /** @param {boolean|number=} implicit */
  function 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);
    }

  function 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') {
        dbg(`handleException: unwinding: EXITSTATUS=${EXITSTATUS}`);
        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 ALLOC_NORMAL = 0;

  var ALLOC_STACK = 1;

  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();;
if (ENVIRONMENT_IS_NODE) { NODEFS.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,
    };;
embind_init_charCodes();
BindingError = Module['BindingError'] = extendError(Error, 'BindingError');;
InternalError = Module['InternalError'] = extendError(Error, 'InternalError');;
init_ClassHandle();
init_embind();;
init_RegisteredPointer();
UnboundTypeError = Module['UnboundTypeError'] = extendError(Error, 'UnboundTypeError');;
init_emval();;
function checkIncomingModuleAPI() {
  ignoredModuleProp('fetchSettings');
}
var wasmImports = {
  "__assert_fail": ___assert_fail,
  "__call_sighandler": ___call_sighandler,
  "__cxa_begin_catch": ___cxa_begin_catch,
  "__cxa_end_catch": ___cxa_end_catch,
  "__cxa_find_matching_catch_2": ___cxa_find_matching_catch_2,
  "__cxa_find_matching_catch_3": ___cxa_find_matching_catch_3,
  "__cxa_find_matching_catch_4": ___cxa_find_matching_catch_4,
  "__cxa_rethrow": ___cxa_rethrow,
  "__cxa_rethrow_primary_exception": ___cxa_rethrow_primary_exception,
  "__cxa_throw": ___cxa_throw,
  "__cxa_uncaught_exceptions": ___cxa_uncaught_exceptions,
  "__resumeException": ___resumeException,
  "__syscall_fadvise64": ___syscall_fadvise64,
  "__syscall_fcntl64": ___syscall_fcntl64,
  "__syscall_fstat64": ___syscall_fstat64,
  "__syscall_lstat64": ___syscall_lstat64,
  "__syscall_newfstatat": ___syscall_newfstatat,
  "__syscall_openat": ___syscall_openat,
  "__syscall_stat64": ___syscall_stat64,
  "__syscall_unlinkat": ___syscall_unlinkat,
  "_embind_register_bigint": __embind_register_bigint,
  "_embind_register_bool": __embind_register_bool,
  "_embind_register_class": __embind_register_class,
  "_embind_register_class_constructor": __embind_register_class_constructor,
  "_embind_register_class_function": __embind_register_class_function,
  "_embind_register_emval": __embind_register_emval,
  "_embind_register_float": __embind_register_float,
  "_embind_register_function": __embind_register_function,
  "_embind_register_integer": __embind_register_integer,
  "_embind_register_memory_view": __embind_register_memory_view,
  "_embind_register_std_string": __embind_register_std_string,
  "_embind_register_std_wstring": __embind_register_std_wstring,
  "_embind_register_void": __embind_register_void,
  "_emval_decref": __emval_decref,
  "_emval_incref": __emval_incref,
  "_emval_take_value": __emval_take_value,
  "_mmap_js": __mmap_js,
  "_munmap_js": __munmap_js,
  "abort": _abort,
  "emscripten_console_error": _emscripten_console_error,
  "emscripten_memcpy_big": _emscripten_memcpy_big,
  "emscripten_resize_heap": _emscripten_resize_heap,
  "environ_get": _environ_get,
  "environ_sizes_get": _environ_sizes_get,
  "fd_close": _fd_close,
  "fd_pread": _fd_pread,
  "fd_pwrite": _fd_pwrite,
  "fd_read": _fd_read,
  "fd_seek": _fd_seek,
  "fd_write": _fd_write,
  "invoke_di": invoke_di,
  "invoke_dii": invoke_dii,
  "invoke_diii": invoke_diii,
  "invoke_fii": invoke_fii,
  "invoke_fiii": invoke_fiii,
  "invoke_i": invoke_i,
  "invoke_iddi": invoke_iddi,
  "invoke_ii": invoke_ii,
  "invoke_iid": invoke_iid,
  "invoke_iiddddd": invoke_iiddddd,
  "invoke_iidi": invoke_iidi,
  "invoke_iii": invoke_iii,
  "invoke_iiid": invoke_iiid,
  "invoke_iiidi": invoke_iiidi,
  "invoke_iiii": invoke_iiii,
  "invoke_iiiid": invoke_iiiid,
  "invoke_iiiiddii": invoke_iiiiddii,
  "invoke_iiiidii": invoke_iiiidii,
  "invoke_iiiii": invoke_iiiii,
  "invoke_iiiiiddd": invoke_iiiiiddd,
  "invoke_iiiiii": invoke_iiiiii,
  "invoke_iiiiiii": invoke_iiiiiii,
  "invoke_iiiiiiid": invoke_iiiiiiid,
  "invoke_iiiiiiii": invoke_iiiiiiii,
  "invoke_iiiiiiiii": invoke_iiiiiiiii,
  "invoke_iiiiiiiiiddid": invoke_iiiiiiiiiddid,
  "invoke_iiiiiiiiidiiiidiiiii": invoke_iiiiiiiiidiiiidiiiii,
  "invoke_iiiiiiiiii": invoke_iiiiiiiiii,
  "invoke_iiiiiiiiiii": invoke_iiiiiiiiiii,
  "invoke_iiiiiiiiiiii": invoke_iiiiiiiiiiii,
  "invoke_iiiiiiiiiiiii": invoke_iiiiiiiiiiiii,
  "invoke_iiiiiiiiiiiiii": invoke_iiiiiiiiiiiiii,
  "invoke_iiiiij": invoke_iiiiij,
  "invoke_iiiji": invoke_iiiji,
  "invoke_iiijii": invoke_iiijii,
  "invoke_iij": invoke_iij,
  "invoke_iijjiii": invoke_iijjiii,
  "invoke_ji": invoke_ji,
  "invoke_jiiii": invoke_jiiii,
  "invoke_jiji": invoke_jiji,
  "invoke_v": invoke_v,
  "invoke_vdd": invoke_vdd,
  "invoke_vi": invoke_vi,
  "invoke_vid": invoke_vid,
  "invoke_vii": invoke_vii,
  "invoke_viid": invoke_viid,
  "invoke_viii": invoke_viii,
  "invoke_viiid": invoke_viiid,
  "invoke_viiidii": invoke_viiidii,
  "invoke_viiidiii": invoke_viiidiii,
  "invoke_viiii": invoke_viiii,
  "invoke_viiiii": invoke_viiiii,
  "invoke_viiiiii": invoke_viiiiii,
  "invoke_viiiiiii": invoke_viiiiiii,
  "invoke_viiiiiiii": invoke_viiiiiiii,
  "invoke_viiiiiiiiii": invoke_viiiiiiiiii,
  "invoke_viiiiiiiiiii": invoke_viiiiiiiiiii,
  "invoke_viiiiiiiiiiiiiii": invoke_viiiiiiiiiiiiiii,
  "invoke_vij": invoke_vij,
  "llvm_eh_typeid_for": _llvm_eh_typeid_for,
  "strftime_l": _strftime_l
};
var asm = createWasm();
/** @type {function(...*):?} */
var ___wasm_call_ctors = createExportWrapper("__wasm_call_ctors");
/** @type {function(...*):?} */
var _main = Module["_main"] = createExportWrapper("__main_argc_argv");
/** @type {function(...*):?} */
var ___cxa_free_exception = createExportWrapper("__cxa_free_exception");
/** @type {function(...*):?} */
var _malloc = createExportWrapper("malloc");
/** @type {function(...*):?} */
var ___errno_location = createExportWrapper("__errno_location");
/** @type {function(...*):?} */
var _free = Module["_free"] = createExportWrapper("free");
/** @type {function(...*):?} */
var ___getTypeName = createExportWrapper("__getTypeName");
/** @type {function(...*):?} */
var __embind_initialize_bindings = Module["__embind_initialize_bindings"] = createExportWrapper("_embind_initialize_bindings");
/** @type {function(...*):?} */
var _fflush = Module["_fflush"] = createExportWrapper("fflush");
/** @type {function(...*):?} */
var _emscripten_builtin_memalign = createExportWrapper("emscripten_builtin_memalign");
/** @type {function(...*):?} */
var _setThrew = createExportWrapper("setThrew");
/** @type {function(...*):?} */
var setTempRet0 = createExportWrapper("setTempRet0");
/** @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 ___cxa_decrement_exception_refcount = createExportWrapper("__cxa_decrement_exception_refcount");
/** @type {function(...*):?} */
var ___cxa_increment_exception_refcount = createExportWrapper("__cxa_increment_exception_refcount");
/** @type {function(...*):?} */
var ___cxa_demangle = createExportWrapper("__cxa_demangle");
/** @type {function(...*):?} */
var ___get_exception_message = Module["___get_exception_message"] = createExportWrapper("__get_exception_message");
/** @type {function(...*):?} */
var ___cxa_can_catch = createExportWrapper("__cxa_can_catch");
/** @type {function(...*):?} */
var ___cxa_is_pointer_type = createExportWrapper("__cxa_is_pointer_type");
/** @type {function(...*):?} */
var dynCall_ji = Module["dynCall_ji"] = createExportWrapper("dynCall_ji");
/** @type {function(...*):?} */
var dynCall_viijj = Module["dynCall_viijj"] = createExportWrapper("dynCall_viijj");
/** @type {function(...*):?} */
var dynCall_iijj = Module["dynCall_iijj"] = createExportWrapper("dynCall_iijj");
/** @type {function(...*):?} */
var dynCall_iij = Module["dynCall_iij"] = createExportWrapper("dynCall_iij");
/** @type {function(...*):?} */
var dynCall_viij = Module["dynCall_viij"] = createExportWrapper("dynCall_viij");
/** @type {function(...*):?} */
var dynCall_ij = Module["dynCall_ij"] = createExportWrapper("dynCall_ij");
/** @type {function(...*):?} */
var dynCall_iiiji = Module["dynCall_iiiji"] = createExportWrapper("dynCall_iiiji");
/** @type {function(...*):?} */
var dynCall_iiiij = Module["dynCall_iiiij"] = createExportWrapper("dynCall_iiiij");
/** @type {function(...*):?} */
var dynCall_viji = Module["dynCall_viji"] = createExportWrapper("dynCall_viji");
/** @type {function(...*):?} */
var dynCall_iiijii = Module["dynCall_iiijii"] = createExportWrapper("dynCall_iiijii");
/** @type {function(...*):?} */
var dynCall_jiji = Module["dynCall_jiji"] = createExportWrapper("dynCall_jiji");
/** @type {function(...*):?} */
var dynCall_vij = Module["dynCall_vij"] = createExportWrapper("dynCall_vij");
/** @type {function(...*):?} */
var dynCall_iijjiii = Module["dynCall_iijjiii"] = createExportWrapper("dynCall_iijjiii");
/** @type {function(...*):?} */
var dynCall_iiji = Module["dynCall_iiji"] = createExportWrapper("dynCall_iiji");
/** @type {function(...*):?} */
var dynCall_vijjjii = Module["dynCall_vijjjii"] = createExportWrapper("dynCall_vijjjii");
/** @type {function(...*):?} */
var dynCall_iiiiij = Module["dynCall_iiiiij"] = createExportWrapper("dynCall_iiiiij");
/** @type {function(...*):?} */
var dynCall_viijii = Module["dynCall_viijii"] = createExportWrapper("dynCall_viijii");
/** @type {function(...*):?} */
var dynCall_jiiii = Module["dynCall_jiiii"] = createExportWrapper("dynCall_jiiii");
/** @type {function(...*):?} */
var dynCall_iiiiijj = Module["dynCall_iiiiijj"] = createExportWrapper("dynCall_iiiiijj");
/** @type {function(...*):?} */
var dynCall_iiiiiijj = Module["dynCall_iiiiiijj"] = createExportWrapper("dynCall_iiiiiijj");

function invoke_iii(index,a1,a2) {
  var sp = stackSave();
  try {
    return getWasmTableEntry(index)(a1,a2);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_viii(index,a1,a2,a3) {
  var sp = stackSave();
  try {
    getWasmTableEntry(index)(a1,a2,a3);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_v(index) {
  var sp = stackSave();
  try {
    getWasmTableEntry(index)();
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_ii(index,a1) {
  var sp = stackSave();
  try {
    return getWasmTableEntry(index)(a1);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_iiii(index,a1,a2,a3) {
  var sp = stackSave();
  try {
    return getWasmTableEntry(index)(a1,a2,a3);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_viiii(index,a1,a2,a3,a4) {
  var sp = stackSave();
  try {
    getWasmTableEntry(index)(a1,a2,a3,a4);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_vii(index,a1,a2) {
  var sp = stackSave();
  try {
    getWasmTableEntry(index)(a1,a2);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_vi(index,a1) {
  var sp = stackSave();
  try {
    getWasmTableEntry(index)(a1);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_iiiiiii(index,a1,a2,a3,a4,a5,a6) {
  var sp = stackSave();
  try {
    return getWasmTableEntry(index)(a1,a2,a3,a4,a5,a6);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_iiiii(index,a1,a2,a3,a4) {
  var sp = stackSave();
  try {
    return getWasmTableEntry(index)(a1,a2,a3,a4);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_iiiiii(index,a1,a2,a3,a4,a5) {
  var sp = stackSave();
  try {
    return getWasmTableEntry(index)(a1,a2,a3,a4,a5);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_viiiiiiii(index,a1,a2,a3,a4,a5,a6,a7,a8) {
  var sp = stackSave();
  try {
    getWasmTableEntry(index)(a1,a2,a3,a4,a5,a6,a7,a8);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_viiiiii(index,a1,a2,a3,a4,a5,a6) {
  var sp = stackSave();
  try {
    getWasmTableEntry(index)(a1,a2,a3,a4,a5,a6);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_viiiii(index,a1,a2,a3,a4,a5) {
  var sp = stackSave();
  try {
    getWasmTableEntry(index)(a1,a2,a3,a4,a5);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_vid(index,a1,a2) {
  var sp = stackSave();
  try {
    getWasmTableEntry(index)(a1,a2);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_iiiiiiiiidiiiidiiiii(index,a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15,a16,a17,a18,a19) {
  var sp = stackSave();
  try {
    return getWasmTableEntry(index)(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15,a16,a17,a18,a19);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_di(index,a1) {
  var sp = stackSave();
  try {
    return getWasmTableEntry(index)(a1);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_iidi(index,a1,a2,a3) {
  var sp = stackSave();
  try {
    return getWasmTableEntry(index)(a1,a2,a3);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_iiiidii(index,a1,a2,a3,a4,a5,a6) {
  var sp = stackSave();
  try {
    return getWasmTableEntry(index)(a1,a2,a3,a4,a5,a6);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_iiiid(index,a1,a2,a3,a4) {
  var sp = stackSave();
  try {
    return getWasmTableEntry(index)(a1,a2,a3,a4);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_iiidi(index,a1,a2,a3,a4) {
  var sp = stackSave();
  try {
    return getWasmTableEntry(index)(a1,a2,a3,a4);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_viiid(index,a1,a2,a3,a4) {
  var sp = stackSave();
  try {
    getWasmTableEntry(index)(a1,a2,a3,a4);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_viiidii(index,a1,a2,a3,a4,a5,a6) {
  var sp = stackSave();
  try {
    getWasmTableEntry(index)(a1,a2,a3,a4,a5,a6);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_iiid(index,a1,a2,a3) {
  var sp = stackSave();
  try {
    return getWasmTableEntry(index)(a1,a2,a3);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_viid(index,a1,a2,a3) {
  var sp = stackSave();
  try {
    getWasmTableEntry(index)(a1,a2,a3);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_dii(index,a1,a2) {
  var sp = stackSave();
  try {
    return getWasmTableEntry(index)(a1,a2);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_iid(index,a1,a2) {
  var sp = stackSave();
  try {
    return getWasmTableEntry(index)(a1,a2);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_iiiiiddd(index,a1,a2,a3,a4,a5,a6,a7) {
  var sp = stackSave();
  try {
    return getWasmTableEntry(index)(a1,a2,a3,a4,a5,a6,a7);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_viiiiiii(index,a1,a2,a3,a4,a5,a6,a7) {
  var sp = stackSave();
  try {
    getWasmTableEntry(index)(a1,a2,a3,a4,a5,a6,a7);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_iddi(index,a1,a2,a3) {
  var sp = stackSave();
  try {
    return getWasmTableEntry(index)(a1,a2,a3);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_diii(index,a1,a2,a3) {
  var sp = stackSave();
  try {
    return getWasmTableEntry(index)(a1,a2,a3);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_vdd(index,a1,a2) {
  var sp = stackSave();
  try {
    getWasmTableEntry(index)(a1,a2);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_i(index) {
  var sp = stackSave();
  try {
    return getWasmTableEntry(index)();
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_iiiiddii(index,a1,a2,a3,a4,a5,a6,a7) {
  var sp = stackSave();
  try {
    return getWasmTableEntry(index)(a1,a2,a3,a4,a5,a6,a7);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_viiidiii(index,a1,a2,a3,a4,a5,a6,a7) {
  var sp = stackSave();
  try {
    getWasmTableEntry(index)(a1,a2,a3,a4,a5,a6,a7);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_iiiiiiid(index,a1,a2,a3,a4,a5,a6,a7) {
  var sp = stackSave();
  try {
    return getWasmTableEntry(index)(a1,a2,a3,a4,a5,a6,a7);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_iiiiiiii(index,a1,a2,a3,a4,a5,a6,a7) {
  var sp = stackSave();
  try {
    return getWasmTableEntry(index)(a1,a2,a3,a4,a5,a6,a7);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_iiiiiiiiiddid(index,a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12) {
  var sp = stackSave();
  try {
    return getWasmTableEntry(index)(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_iiddddd(index,a1,a2,a3,a4,a5,a6) {
  var sp = stackSave();
  try {
    return getWasmTableEntry(index)(a1,a2,a3,a4,a5,a6);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_iiiiiiiii(index,a1,a2,a3,a4,a5,a6,a7,a8) {
  var sp = stackSave();
  try {
    return getWasmTableEntry(index)(a1,a2,a3,a4,a5,a6,a7,a8);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_iiiiiiiiii(index,a1,a2,a3,a4,a5,a6,a7,a8,a9) {
  var sp = stackSave();
  try {
    return getWasmTableEntry(index)(a1,a2,a3,a4,a5,a6,a7,a8,a9);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_iiiiiiiiiii(index,a1,a2,a3,a4,a5,a6,a7,a8,a9,a10) {
  var sp = stackSave();
  try {
    return getWasmTableEntry(index)(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_viiiiiiiiii(index,a1,a2,a3,a4,a5,a6,a7,a8,a9,a10) {
  var sp = stackSave();
  try {
    getWasmTableEntry(index)(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_iiiiiiiiiiiiii(index,a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13) {
  var sp = stackSave();
  try {
    return getWasmTableEntry(index)(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_viiiiiiiiiii(index,a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11) {
  var sp = stackSave();
  try {
    getWasmTableEntry(index)(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_fii(index,a1,a2) {
  var sp = stackSave();
  try {
    return getWasmTableEntry(index)(a1,a2);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_fiii(index,a1,a2,a3) {
  var sp = stackSave();
  try {
    return getWasmTableEntry(index)(a1,a2,a3);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_iiiiiiiiiiiii(index,a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12) {
  var sp = stackSave();
  try {
    return getWasmTableEntry(index)(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_iiiiiiiiiiii(index,a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11) {
  var sp = stackSave();
  try {
    return getWasmTableEntry(index)(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_viiiiiiiiiiiiiii(index,a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15) {
  var sp = stackSave();
  try {
    getWasmTableEntry(index)(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_jiji(index,a1,a2,a3,a4) {
  var sp = stackSave();
  try {
    return dynCall_jiji(index,a1,a2,a3,a4);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_iiiji(index,a1,a2,a3,a4,a5) {
  var sp = stackSave();
  try {
    return dynCall_iiiji(index,a1,a2,a3,a4,a5);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_iiijii(index,a1,a2,a3,a4,a5,a6) {
  var sp = stackSave();
  try {
    return dynCall_iiijii(index,a1,a2,a3,a4,a5,a6);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_vij(index,a1,a2,a3) {
  var sp = stackSave();
  try {
    dynCall_vij(index,a1,a2,a3);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_iij(index,a1,a2,a3) {
  var sp = stackSave();
  try {
    return dynCall_iij(index,a1,a2,a3);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_ji(index,a1) {
  var sp = stackSave();
  try {
    return dynCall_ji(index,a1);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_iijjiii(index,a1,a2,a3,a4,a5,a6,a7,a8) {
  var sp = stackSave();
  try {
    return dynCall_iijjiii(index,a1,a2,a3,a4,a5,a6,a7,a8);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_iiiiij(index,a1,a2,a3,a4,a5,a6) {
  var sp = stackSave();
  try {
    return dynCall_iiiiij(index,a1,a2,a3,a4,a5,a6);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}

function invoke_jiiii(index,a1,a2,a3,a4) {
  var sp = stackSave();
  try {
    return dynCall_jiiii(index,a1,a2,a3,a4);
  } catch(e) {
    stackRestore(sp);
    if (!(e instanceof EmscriptenEH)) throw e;
    _setThrew(1, 0);
  }
}


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

Module["out"] = out;
Module["err"] = err;
Module["ALLOC_NORMAL"] = ALLOC_NORMAL;
Module["ALLOC_STACK"] = ALLOC_STACK;
var missingLibrarySymbols = [
  'ydayFromDate',
  'inetPton4',
  'inetNtop4',
  'inetPton6',
  'inetNtop6',
  'readSockaddr',
  'writeSockaddr',
  'getHostByName',
  'traverseStack',
  'getCallstack',
  'emscriptenLog',
  'convertPCtoSourceLocation',
  'readEmAsmArgs',
  'jstoi_q',
  'jstoi_s',
  'listenOnce',
  'autoResumeAudioContext',
  'runtimeKeepalivePush',
  'runtimeKeepalivePop',
  'callUserCallback',
  'maybeExit',
  'safeSetTimeout',
  'asmjsMangle',
  'getNativeTypeSize',
  'STACK_SIZE',
  'STACK_ALIGN',
  'POINTER_SIZE',
  'ASSERTIONS',
  'writeI53ToI64',
  'writeI53ToI64Clamped',
  'writeI53ToI64Signaling',
  'writeI53ToU64Clamped',
  'writeI53ToU64Signaling',
  'readI53FromI64',
  'readI53FromU64',
  'convertI32PairToI53',
  'convertU32PairToI53',
  'getCFunc',
  'ccall',
  'cwrap',
  'uleb128Encode',
  'sigToWasmTypes',
  'generateFuncType',
  'convertJsFunctionToWasm',
  'getEmptyTableSlot',
  'updateTableMap',
  'getFunctionAddress',
  'addFunction',
  'removeFunction',
  'reallyNegative',
  'unSign',
  'strLen',
  'reSign',
  'formatString',
  'intArrayToString',
  'AsciiToString',
  'stringToNewUTF8',
  'registerKeyEventCallback',
  'maybeCStringToJsString',
  'findEventTarget',
  'findCanvasEventTarget',
  'getBoundingClientRect',
  'fillMouseEventData',
  'registerMouseEventCallback',
  'registerWheelEventCallback',
  'registerUiEventCallback',
  'registerFocusEventCallback',
  'fillDeviceOrientationEventData',
  'registerDeviceOrientationEventCallback',
  'fillDeviceMotionEventData',
  'registerDeviceMotionEventCallback',
  'screenOrientation',
  'fillOrientationChangeEventData',
  'registerOrientationChangeEventCallback',
  'fillFullscreenChangeEventData',
  'registerFullscreenChangeEventCallback',
  'JSEvents_requestFullscreen',
  'JSEvents_resizeCanvasForFullscreen',
  'registerRestoreOldStyle',
  'hideEverythingExceptGivenElement',
  'restoreHiddenElements',
  'setLetterbox',
  'softFullscreenResizeWebGLRenderTarget',
  'doRequestFullscreen',
  'fillPointerlockChangeEventData',
  'registerPointerlockChangeEventCallback',
  'registerPointerlockErrorEventCallback',
  'requestPointerLock',
  'fillVisibilityChangeEventData',
  'registerVisibilityChangeEventCallback',
  'registerTouchEventCallback',
  'fillGamepadEventData',
  'registerGamepadEventCallback',
  'registerBeforeUnloadEventCallback',
  'fillBatteryEventData',
  'battery',
  'registerBatteryEventCallback',
  'setCanvasElementSize',
  'getCanvasElementSize',
  'checkWasiClock',
  'wasiRightsToMuslOFlags',
  'wasiOFlagsToMuslOFlags',
  'createDyncallWrapper',
  'setImmediateWrapped',
  'clearImmediateWrapped',
  'polyfillSetImmediate',
  'getPromise',
  'makePromise',
  'idsToPromises',
  'makePromiseCallback',
  'setMainLoop',
  'getSocketFromFD',
  'getSocketAddress',
  '_setNetworkCallback',
  'heapObjectForWebGLType',
  'heapAccessShiftForWebGLHeap',
  'webgl_enable_ANGLE_instanced_arrays',
  'webgl_enable_OES_vertex_array_object',
  'webgl_enable_WEBGL_draw_buffers',
  'webgl_enable_WEBGL_multi_draw',
  'emscriptenWebGLGet',
  'computeUnpackAlignedImageSize',
  'colorChannelsInGlTextureFormat',
  'emscriptenWebGLGetTexPixelData',
  '__glGenObject',
  'emscriptenWebGLGetUniform',
  'webglGetUniformLocation',
  'webglPrepareUniformLocationsBeforeFirstUse',
  'webglGetLeftBracePos',
  'emscriptenWebGLGetVertexAttrib',
  '__glGetActiveAttribOrUniform',
  'writeGLArray',
  'registerWebGlEventCallback',
  'runAndAbortIfError',
  'SDL_unicode',
  'SDL_ttfContext',
  'SDL_audio',
  'GLFW_Window',
  'allocate',
  'writeStringToMemory',
  'writeAsciiToMemory',
  'registerInheritedInstance',
  'unregisterInheritedInstance',
  'enumReadValueFromPointer',
  'validateThis',
  'getStringOrSymbol',
  'craftEmvalAllocator',
  'emval_get_global',
  'emval_lookupTypes',
  'emval_allocateDestructors',
  'emval_addMethodCaller',
];
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',
  'callMain',
  'abort',
  'keepRuntimeAlive',
  'wasmMemory',
  'stackAlloc',
  'stackSave',
  'stackRestore',
  'getTempRet0',
  'setTempRet0',
  'writeStackCookie',
  'checkStackCookie',
  'prettyPrint',
  'ptrToString',
  'zeroMemory',
  'exitJS',
  'getHeapMax',
  'emscripten_realloc_buffer',
  'ENV',
  'MONTH_DAYS_REGULAR',
  'MONTH_DAYS_LEAP',
  'MONTH_DAYS_REGULAR_CUMULATIVE',
  'MONTH_DAYS_LEAP_CUMULATIVE',
  'isLeapYear',
  'arraySum',
  'addDays',
  'ERRNO_CODES',
  'ERRNO_MESSAGES',
  'setErrNo',
  'DNS',
  'Protocols',
  'Sockets',
  'initRandomFill',
  'randomFill',
  'timers',
  'warnOnce',
  'UNWIND_CACHE',
  'readEmAsmArgsArray',
  'getExecutableName',
  'dynCallLegacy',
  'getDynCaller',
  'dynCall',
  'handleException',
  'asyncLoad',
  'alignMemory',
  'mmapAlloc',
  'HandleAllocator',
  'convertI32PairToI53Checked',
  'freeTableIndexes',
  'functionsInTableMap',
  'setValue',
  'getValue',
  'PATH',
  'PATH_FS',
  'UTF8Decoder',
  'UTF8ArrayToString',
  'UTF8ToString',
  'stringToUTF8Array',
  'stringToUTF8',
  'lengthBytesUTF8',
  'intArrayFromString',
  'stringToAscii',
  'UTF16Decoder',
  'UTF16ToString',
  'stringToUTF16',
  'lengthBytesUTF16',
  'UTF32ToString',
  'stringToUTF32',
  'lengthBytesUTF32',
  'stringToUTF8OnStack',
  'writeArrayToMemory',
  'JSEvents',
  'specialHTMLTargets',
  'currentFullscreenStrategy',
  'restoreOldWindowedStyle',
  'demangle',
  'demangleAll',
  'jsStackTrace',
  'stackTrace',
  'ExitStatus',
  'getEnvStrings',
  'doReadv',
  'doWritev',
  'dlopenMissingError',
  'promiseMap',
  'uncaughtExceptionCount',
  'exceptionLast',
  'exceptionCaught',
  'ExceptionInfo',
  'getExceptionMessageCommon',
  'incrementExceptionRefcount',
  'decrementExceptionRefcount',
  'getExceptionMessage',
  'Browser',
  'wget',
  'SYSCALLS',
  'preloadPlugins',
  'FS_createPreloadedFile',
  'FS_modeStringToFlags',
  'FS_getMode',
  'FS',
  'MEMFS',
  'TTY',
  'PIPEFS',
  'SOCKFS',
  'tempFixedLengthArray',
  'miniTempWebGLFloatBuffers',
  'miniTempWebGLIntBuffers',
  'GL',
  'emscripten_webgl_power_preferences',
  'AL',
  'GLUT',
  'EGL',
  'GLEW',
  'IDBStore',
  'SDL',
  'SDL_gfx',
  'GLFW',
  'allocateUTF8',
  'allocateUTF8OnStack',
  'InternalError',
  'BindingError',
  'UnboundTypeError',
  'PureVirtualError',
  'init_embind',
  'throwInternalError',
  'throwBindingError',
  'throwUnboundTypeError',
  'ensureOverloadTable',
  'exposePublicSymbol',
  'replacePublicSymbol',
  'extendError',
  'createNamedFunction',
  'embindRepr',
  'registeredInstances',
  'getBasestPointer',
  'getInheritedInstance',
  'getInheritedInstanceCount',
  'getLiveInheritedInstances',
  'registeredTypes',
  'awaitingDependencies',
  'typeDependencies',
  'registeredPointers',
  'registerType',
  'whenDependentTypesAreResolved',
  'embind_charCodes',
  'embind_init_charCodes',
  'readLatin1String',
  'getTypeName',
  'heap32VectorToArray',
  'requireRegisteredType',
  'getShiftFromSize',
  'integerReadValueFromPointer',
  'floatReadValueFromPointer',
  'simpleReadValueFromPointer',
  'runDestructors',
  'craftInvokerFunction',
  'embind__requireFunction',
  'tupleRegistrations',
  'structRegistrations',
  'genericPointerToWireType',
  'constNoSmartPtrRawPointerToWireType',
  'nonConstNoSmartPtrRawPointerToWireType',
  'init_RegisteredPointer',
  'RegisteredPointer',
  'RegisteredPointer_getPointee',
  'RegisteredPointer_destructor',
  'RegisteredPointer_deleteObject',
  'RegisteredPointer_fromWireType',
  'runDestructor',
  'releaseClassHandle',
  'finalizationRegistry',
  'detachFinalizer_deps',
  'detachFinalizer',
  'attachFinalizer',
  'makeClassHandle',
  'init_ClassHandle',
  'ClassHandle',
  'ClassHandle_isAliasOf',
  'throwInstanceAlreadyDeleted',
  'ClassHandle_clone',
  'ClassHandle_delete',
  'deletionQueue',
  'ClassHandle_isDeleted',
  'ClassHandle_deleteLater',
  'flushPendingDeletes',
  'delayFunction',
  'setDelayFunction',
  'RegisteredClass',
  'shallowCopyInternalPointer',
  'downcastPointer',
  'upcastPointer',
  'char_0',
  'char_9',
  'makeLegalFunctionName',
  'emval_handles',
  'emval_symbols',
  'init_emval',
  'count_emval_handles',
  'Emval',
  'emval_newers',
  'emval_methodCallers',
  'emval_registeredMethods',
  'WORKERFS',
  'NODEFS',
];
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(args = []) {
  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;

  args.unshift(thisProgram);

  var argc = args.length;
  var argv = stackAlloc((argc + 1) * 4);
  var argv_ptr = argv >> 2;
  args.forEach((arg) => {
    HEAP32[argv_ptr++] = stringToUTF8OnStack(arg);
  });
  HEAP32[argv_ptr] = 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(args = arguments_) {

  if (runDependencies > 0) {
    dbg('run() called, but dependencies remain, so not running');
    return;
  }

    stackCheckInit();

  preRun();

  // a preRun added a dependency, run will be called later
  if (runDependencies > 0) {
    dbg('run() called, but dependencies remain, so not running');
    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(args);

    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
// include: /src/postjs_file_api.js
    } else {
        console.error('Invalid action: ' + action);
        outgoingMessagePort.postMessage('invalid action');
    }
}, false);

// end include: /src/postjs_file_api.js
