pyscript/pyscript.core/micropython/micropython.mjs

var _createMicroPythonModule = (() => {
    var _scriptDir =
        typeof document !== "undefined" && document.currentScript
            ? document.currentScript.src
            : undefined;
    if (typeof __filename !== "undefined")
        _scriptDir = _scriptDir || __filename;
    return function (_createMicroPythonModule = {}) {
        // 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 _createMicroPythonModule != "undefined"
                ? _createMicroPythonModule
                : {};

        // Set up the promise that indicates the Module is initialized
        var readyPromiseResolve, readyPromiseReject;
        Module["ready"] = new Promise((resolve, reject) => {
            readyPromiseResolve = resolve;
            readyPromiseReject = reject;
        });
        [
            "_mp_js_init",
            "_mp_js_init_repl",
            "_mp_js_do_str",
            "_mp_js_process_char",
            "_mp_hal_get_interrupt_char",
            "_mp_sched_keyboard_interrupt",
            "_malloc",
            "_free",
            "_mp_js_do_exec",
            "_mp_js_do_import",
            "_mp_js_register_js_module",
            "_mp_obj_jsobj_callback_proxy",
            "_proxy_c_init",
            "_proxy_c_to_js_call",
            "_proxy_c_to_js_lookup_attr",
            "_fflush",
            "onRuntimeInitialized",
        ].forEach((prop) => {
            if (!Object.getOwnPropertyDescriptor(Module["ready"], prop)) {
                Object.defineProperty(Module["ready"], prop, {
                    get: () =>
                        abort(
                            "You are getting " +
                                prop +
                                " on the Promise object, instead of the instance. Use .then() to get called back with the instance, see the MODULARIZE docs in src/settings.js",
                        ),
                    set: () =>
                        abort(
                            "You are setting " +
                                prop +
                                " on the Promise object, instead of the instance. Use .then() to get called back with the instance, see the MODULARIZE docs in src/settings.js",
                        ),
                });
            }
        });

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

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

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

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

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

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

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

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

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

            var nodeVersion = process.versions.node;
            var numericVersion = nodeVersion.split(".").slice(0, 3);
            numericVersion =
                numericVersion[0] * 10000 +
                numericVersion[1] * 100 +
                numericVersion[2].split("-")[0] * 1;
            var minVersion = 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);

            // MODULARIZE will export the module in the proper place outside, we don't need to export here

            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
                    );
            }
        }

        // 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.
        else 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;
            }
            // When MODULARIZE, this JS may be executed later, after document.currentScript
            // is gone, so we saved it, and we use it here instead of any other info.
            if (_scriptDir) {
                scriptDirectory = _scriptDir;
            }
            // 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.warn.bind(console);

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

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

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

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

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

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

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

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

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

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

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

        // Wasm globals

        var wasmMemory;

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

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

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

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

        // We used to include malloc/free by default in the past. Show a helpful error in
        // builds with assertions.

        // Memory management

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

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

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

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

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

        // include: runtime_init_table.js
        // In regular non-RELOCATABLE mode the table is exported
        // from the wasm module and this will be assigned once
        // the exports are available.
        var wasmTable;

        // end include: runtime_init_table.js
        // include: runtime_stack_check.js
        // Initializes the stack cookie. Called at the startup of main and at the startup of each thread in pthreads mode.
        function writeStackCookie() {
            var max = _emscripten_stack_get_end();
            assert((max & 3) == 0);
            // If the stack ends at address zero we write our cookies 4 bytes into the
            // stack.  This prevents interference with the (separate) address-zero check
            // below.
            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] = 0x63736d65; /* 'emsc' */
        }

        function checkStackCookie() {
            if (ABORT) return;
            var max = _emscripten_stack_get_end();
            // See writeStackCookie().
            if (max == 0) {
                max += 4;
            }
            var cookie1 = HEAPU32[max >> 2];
            var cookie2 = HEAPU32[(max + 4) >> 2];
            if (cookie1 != 0x02135467 || cookie2 != 0x89bacdfe) {
                abort(
                    "Stack overflow! Stack cookie has been overwritten at " +
                        ptrToString(max) +
                        ", expected hex dwords 0x89BACDFE and 0x2135467, but received " +
                        ptrToString(cookie2) +
                        " " +
                        ptrToString(cookie1),
                );
            }
            // Also test the global address 0 for integrity.
            if (HEAPU32[0] !== 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 __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 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 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);

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

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

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

        // Indicates whether filename is delivered via file protocol (as opposed to http/https)
        function isFileURI(filename) {
            return filename.startsWith("file://");
        }

        // end include: URIUtils.js
        /** @param {boolean=} fixedasm */
        function createExportWrapper(name, fixedasm) {
            return function () {
                var displayName = name;
                var asm = fixedasm;
                if (!fixedasm) {
                    asm = Module["asm"];
                }
                assert(
                    runtimeInitialized,
                    "native function `" +
                        displayName +
                        "` called before runtime initialization",
                );
                if (!asm[name]) {
                    assert(
                        asm[name],
                        "exported native function `" +
                            displayName +
                            "` not found",
                    );
                }
                return asm[name].apply(null, arguments);
            };
        }

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

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

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

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

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

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

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

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

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

                Module["asm"] = exports;

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

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

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

                removeRunDependency("wasm-instantiate");

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

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

            // User shell pages can write their own Module.instantiateWasm = function(imports, successCallback) callback
            // to manually instantiate the Wasm module themselves. This allows pages to
            // run the instantiation parallel to any other async startup actions they are
            // performing.
            // Also pthreads and wasm workers initialize the wasm instance through this
            // path.
            if (Module["instantiateWasm"]) {
                try {
                    return Module["instantiateWasm"](info, receiveInstance);
                } catch (e) {
                    err(
                        "Module.instantiateWasm callback failed with error: " +
                            e,
                    );
                    // If instantiation fails, reject the module ready promise.
                    readyPromiseReject(e);
                }
            }

            // If instantiation fails, reject the module ready promise.
            instantiateAsync(
                wasmBinary,
                wasmBinaryFile,
                info,
                receiveInstantiationResult,
            ).catch(readyPromiseReject);
            return {}; // no exports yet; we'll fill them in later
        }

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

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

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

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

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

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

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

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

        // Used by XXXXX_DEBUG settings to output debug messages.
        function dbg(text) {
            // TODO(sbc): Make this configurable somehow.  Its not always convenient for
            // logging to show up as errors.
            console.error.apply(console, arguments);
        }

        // end include: runtime_debug.js
        // === Body ===

        function load_global(str, out) {
            let s = UTF8ToString(str);
            if (s in globalThis) {
                let value = globalThis[s];
                if (typeof value == "function") {
                    value = value.bind(globalThis);
                }
                convert_js_to_mp_obj_jsside(value, out);
                return true;
            } else {
                return false;
            }
        }
        function lookup_attr(jsref, str, out) {
            const base = proxy_js_ref[jsref];
            const attr = UTF8ToString(str);
            console.debug("lookup_attr", jsref, base, attr);
            if (attr in base) {
                let value = base[attr];
                if (typeof value == "function") {
                    value = value.bind(base);
                }
                convert_js_to_mp_obj_jsside(value, out);
                return true;
            } else {
                return false;
            }
        }
        function store_attr(jsref, attr_ptr, value_ref) {
            const attr = UTF8ToString(attr_ptr);
            const value = convert_mp_to_js_obj_jsside(value_ref);
            console.debug("store_attr", proxy_js_ref[jsref], attr, value);
            proxy_js_ref[jsref][attr] = value;
        }
        function call0(f_ref, out) {
            let f = proxy_js_ref[f_ref];
            let ret = f();
            convert_js_to_mp_obj_jsside(ret, out);
        }
        function call1(f_ref, a0, out) {
            const a0_js = convert_mp_to_js_obj_jsside(a0);
            const ret = proxy_js_ref[f_ref](a0_js);
            convert_js_to_mp_obj_jsside(ret, out);
        }
        function call0_kwarg(f_ref, n_kw, key, value, out) {
            let f = proxy_js_ref[f_ref];
            let a = {};
            for (let i = 0; i < n_kw; ++i) {
                let k = UTF8ToString(getValue(key + i * 4, "i32"));
                let v = convert_mp_to_js_obj_jsside(value + i * 3 * 4);
                a[k] = v;
            }
            let ret = f(a);
            convert_js_to_mp_obj_jsside(ret, out);
        }
        function call1_kwarg(f_ref, arg0, n_kw, key, value, out) {
            let f = proxy_js_ref[f_ref];
            let a0 = convert_mp_to_js_obj_jsside(arg0);
            let a = {};
            for (let i = 0; i < n_kw; ++i) {
                let k = UTF8ToString(getValue(key + i * 4, "i32"));
                let v = convert_mp_to_js_obj_jsside(value + i * 3 * 4);
                a[k] = v;
            }
            let ret = f(a0, a);
            convert_js_to_mp_obj_jsside(ret, out);
        }
        function call2(f_ref, a0, a1, out) {
            const a0_js = convert_mp_to_js_obj_jsside(a0);
            const a1_js = convert_mp_to_js_obj_jsside(a1);
            const ret = proxy_js_ref[f_ref](a0_js, a1_js);
            convert_js_to_mp_obj_jsside(ret, out);
        }
        function js_reflect_construct(a0_ref, a1, out) {
            const ret = Reflect.construct(proxy_js_ref[a0_ref], [
                UTF8ToString(a1),
            ]);
            convert_js_to_mp_obj_jsside(ret, out);
        }
        function js_get_len(f_ref) {
            return proxy_js_ref[f_ref].length;
        }
        function js_subscr_int(f_ref, idx, out) {
            const ret = proxy_js_ref[f_ref][idx];
            convert_js_to_mp_obj_jsside(ret, out);
        }
        function js_subscr_load(f_ref, index_ref, out) {
            const target = proxy_js_ref[f_ref];
            const index = python_index_semantics(
                target,
                convert_mp_to_js_obj_jsside(index_ref),
            );
            const ret = target[index];
            convert_js_to_mp_obj_jsside(ret, out);
        }
        function js_subscr_store(f_ref, idx, value) {
            proxy_js_ref[f_ref][convert_mp_to_js_obj_jsside(idx)] =
                convert_mp_to_js_obj_jsside(value);
        }
        function js_callable_proxy(callable, out) {
            const callback = function (js0, js1) {
                console.log("js_callable_proxy", js0, js1);
                let out2 = 0;
                if (js0 !== undefined) {
                    out2 = _malloc(3 * 4);
                    convert_js_to_mp_obj_jsside(js0, out2);
                }
                const out3 = _malloc(3 * 4);
                ccall(
                    "mp_obj_jsobj_callback_proxy",
                    "number",
                    ["pointer", "pointer", "pointer"],
                    [callable, out2, out3],
                );
                if (out2 != 0) {
                    _free(out2);
                }
                const ret = convert_mp_to_js_obj_jsside(out3);
                _free(out3);
                return ret;
            };
            convert_js_to_mp_obj_jsside(callback, out);
        }

        // 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);
            }
        }

        /**
         * @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":
                    return HEAP32[ptr >> 2];
                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 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":
                    (tempI64 = [
                        value >>> 0,
                        ((tempDouble = value),
                        +Math.abs(tempDouble) >= 1.0
                            ? tempDouble > 0.0
                                ? +Math.floor(tempDouble / 4294967296.0) >>> 0
                                : ~~+Math.ceil(
                                      (tempDouble - +(~~tempDouble >>> 0)) /
                                          4294967296.0,
                                  ) >>> 0
                            : 0),
                    ]),
                        (HEAP32[ptr >> 2] = tempI64[0]),
                        (HEAP32[(ptr + 4) >> 2] = tempI64[1]);
                    break;
                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 warnOnce(text) {
            if (!warnOnce.shown) warnOnce.shown = {};
            if (!warnOnce.shown[text]) {
                warnOnce.shown[text] = 1;
                if (ENVIRONMENT_IS_NODE) text = "warning: " + text;
                err(text);
            }
        }

        var 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("/");
            },
        };

        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;
        }
        /** @type {function(string, boolean=, number=)} */
        function intArrayFromString(stringy, dontAddNull, length) {
            var len = length > 0 ? length : lengthBytesUTF8(stringy) + 1;
            var u8array = new Array(len);
            var numBytesWritten = stringToUTF8Array(
                stringy,
                u8array,
                0,
                u8array.length,
            );
            if (dontAddNull) u8array.length = numBytesWritten;
            return u8array;
        }

        var UTF8Decoder =
            typeof TextDecoder != "undefined"
                ? new TextDecoder("utf8")
                : undefined;

        /**
         * Given a pointer 'idx' to a null-terminated UTF8-encoded string in the given
         * array that contains uint8 values, returns a copy of that string as a
         * Javascript String object.
         * heapOrArray is either a regular array, or a JavaScript typed array view.
         * @param {number} idx
         * @param {number=} maxBytesToRead
         * @return {string}
         */
        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;
        }
        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) {
            abort(
                "internal error: mmapAlloc called but `emscripten_builtin_memalign` native symbol not exported",
            );
        }
        var MEMFS = {
            ops_table: null,
            mount: function (mount) {
                return MEMFS.createNode(null, "/", 16384 | 511 /* 0777 */, 0);
            },
            createNode: function (parent, name, mode, dev) {
                if (FS.isBlkdev(mode) || FS.isFIFO(mode)) {
                    // no supported
                    throw new FS.ErrnoError(63);
                }
                if (!MEMFS.ops_table) {
                    MEMFS.ops_table = {
                        dir: {
                            node: {
                                getattr: MEMFS.node_ops.getattr,
                                setattr: MEMFS.node_ops.setattr,
                                lookup: MEMFS.node_ops.lookup,
                                mknod: MEMFS.node_ops.mknod,
                                rename: MEMFS.node_ops.rename,
                                unlink: MEMFS.node_ops.unlink,
                                rmdir: MEMFS.node_ops.rmdir,
                                readdir: MEMFS.node_ops.readdir,
                                symlink: MEMFS.node_ops.symlink,
                            },
                            stream: {
                                llseek: MEMFS.stream_ops.llseek,
                            },
                        },
                        file: {
                            node: {
                                getattr: MEMFS.node_ops.getattr,
                                setattr: MEMFS.node_ops.setattr,
                            },
                            stream: {
                                llseek: MEMFS.stream_ops.llseek,
                                read: MEMFS.stream_ops.read,
                                write: MEMFS.stream_ops.write,
                                allocate: MEMFS.stream_ops.allocate,
                                mmap: MEMFS.stream_ops.mmap,
                                msync: MEMFS.stream_ops.msync,
                            },
                        },
                        link: {
                            node: {
                                getattr: MEMFS.node_ops.getattr,
                                setattr: MEMFS.node_ops.setattr,
                                readlink: MEMFS.node_ops.readlink,
                            },
                            stream: {},
                        },
                        chrdev: {
                            node: {
                                getattr: MEMFS.node_ops.getattr,
                                setattr: MEMFS.node_ops.setattr,
                            },
                            stream: FS.chrdev_stream_ops,
                        },
                    };
                }
                var node = FS.createNode(parent, name, mode, dev);
                if (FS.isDir(node.mode)) {
                    node.node_ops = MEMFS.ops_table.dir.node;
                    node.stream_ops = MEMFS.ops_table.dir.stream;
                    node.contents = {};
                } else if (FS.isFile(node.mode)) {
                    node.node_ops = MEMFS.ops_table.file.node;
                    node.stream_ops = MEMFS.ops_table.file.stream;
                    node.usedBytes = 0; // The actual number of bytes used in the typed array, as opposed to contents.length which gives the whole capacity.
                    // When the byte data of the file is populated, this will point to either a typed array, or a normal JS array. Typed arrays are preferred
                    // for performance, and used by default. However, typed arrays are not resizable like normal JS arrays are, so there is a small disk size
                    // penalty involved for appending file writes that continuously grow a file similar to std::vector capacity vs used -scheme.
                    node.contents = null;
                } else if (FS.isLink(node.mode)) {
                    node.node_ops = MEMFS.ops_table.link.node;
                    node.stream_ops = MEMFS.ops_table.link.stream;
                } else if (FS.isChrdev(node.mode)) {
                    node.node_ops = MEMFS.ops_table.chrdev.node;
                    node.stream_ops = MEMFS.ops_table.chrdev.stream;
                }
                node.timestamp = Date.now();
                // add the new node to the parent
                if (parent) {
                    parent.contents[name] = node;
                    parent.timestamp = node.timestamp;
                }
                return node;
            },
            getFileDataAsTypedArray: function (node) {
                if (!node.contents) return new Uint8Array(0);
                if (node.contents.subarray)
                    return node.contents.subarray(0, node.usedBytes); // Make sure to not return excess unused bytes.
                return new Uint8Array(node.contents);
            },
            expandFileStorage: function (node, newCapacity) {
                var prevCapacity = node.contents ? node.contents.length : 0;
                if (prevCapacity >= newCapacity) return; // No need to expand, the storage was already large enough.
                // Don't expand strictly to the given requested limit if it's only a very small increase, but instead geometrically grow capacity.
                // For small filesizes (<1MB), perform size*2 geometric increase, but for large sizes, do a much more conservative size*1.125 increase to
                // avoid overshooting the allocation cap by a very large margin.
                var CAPACITY_DOUBLING_MAX = 1024 * 1024;
                newCapacity = Math.max(
                    newCapacity,
                    (prevCapacity *
                        (prevCapacity < CAPACITY_DOUBLING_MAX
                            ? 2.0
                            : 1.125)) >>>
                        0,
                );
                if (prevCapacity != 0) newCapacity = Math.max(newCapacity, 256); // At minimum allocate 256b for each file when expanding.
                var oldContents = node.contents;
                node.contents = new Uint8Array(newCapacity); // Allocate new storage.
                if (node.usedBytes > 0)
                    node.contents.set(
                        oldContents.subarray(0, node.usedBytes),
                        0,
                    ); // Copy old data over to the new storage.
            },
            resizeFileStorage: function (node, newSize) {
                if (node.usedBytes == newSize) return;
                if (newSize == 0) {
                    node.contents = null; // Fully decommit when requesting a resize to zero.
                    node.usedBytes = 0;
                } else {
                    var oldContents = node.contents;
                    node.contents = new Uint8Array(newSize); // Allocate new storage.
                    if (oldContents) {
                        node.contents.set(
                            oldContents.subarray(
                                0,
                                Math.min(newSize, node.usedBytes),
                            ),
                        ); // Copy old data over to the new storage.
                    }
                    node.usedBytes = newSize;
                }
            },
            node_ops: {
                getattr: function (node) {
                    var attr = {};
                    // device numbers reuse inode numbers.
                    attr.dev = FS.isChrdev(node.mode) ? node.id : 1;
                    attr.ino = node.id;
                    attr.mode = node.mode;
                    attr.nlink = 1;
                    attr.uid = 0;
                    attr.gid = 0;
                    attr.rdev = node.rdev;
                    if (FS.isDir(node.mode)) {
                        attr.size = 4096;
                    } else if (FS.isFile(node.mode)) {
                        attr.size = node.usedBytes;
                    } else if (FS.isLink(node.mode)) {
                        attr.size = node.link.length;
                    } else {
                        attr.size = 0;
                    }
                    attr.atime = new Date(node.timestamp);
                    attr.mtime = new Date(node.timestamp);
                    attr.ctime = new Date(node.timestamp);
                    // NOTE: In our implementation, st_blocks = Math.ceil(st_size/st_blksize),
                    //       but this is not required by the standard.
                    attr.blksize = 4096;
                    attr.blocks = Math.ceil(attr.size / attr.blksize);
                    return attr;
                },
                setattr: function (node, attr) {
                    if (attr.mode !== undefined) {
                        node.mode = attr.mode;
                    }
                    if (attr.timestamp !== undefined) {
                        node.timestamp = attr.timestamp;
                    }
                    if (attr.size !== undefined) {
                        MEMFS.resizeFileStorage(node, attr.size);
                    }
                },
                lookup: function (parent, name) {
                    throw FS.genericErrors[44];
                },
                mknod: function (parent, name, mode, dev) {
                    return MEMFS.createNode(parent, name, mode, dev);
                },
                rename: function (old_node, new_dir, new_name) {
                    // if we're overwriting a directory at new_name, make sure it's empty.
                    if (FS.isDir(old_node.mode)) {
                        var new_node;
                        try {
                            new_node = FS.lookupNode(new_dir, new_name);
                        } catch (e) {}
                        if (new_node) {
                            for (var i in new_node.contents) {
                                throw new FS.ErrnoError(55);
                            }
                        }
                    }
                    // do the internal rewiring
                    delete old_node.parent.contents[old_node.name];
                    old_node.parent.timestamp = Date.now();
                    old_node.name = new_name;
                    new_dir.contents[new_name] = old_node;
                    new_dir.timestamp = old_node.parent.timestamp;
                    old_node.parent = new_dir;
                },
                unlink: function (parent, name) {
                    delete parent.contents[name];
                    parent.timestamp = Date.now();
                },
                rmdir: function (parent, name) {
                    var node = FS.lookupNode(parent, name);
                    for (var i in node.contents) {
                        throw new FS.ErrnoError(55);
                    }
                    delete parent.contents[name];
                    parent.timestamp = Date.now();
                },
                readdir: function (node) {
                    var entries = [".", ".."];
                    for (var key in node.contents) {
                        if (!node.contents.hasOwnProperty(key)) {
                            continue;
                        }
                        entries.push(key);
                    }
                    return entries;
                },
                symlink: function (parent, newname, oldpath) {
                    var node = MEMFS.createNode(
                        parent,
                        newname,
                        511 /* 0777 */ | 40960,
                        0,
                    );
                    node.link = oldpath;
                    return node;
                },
                readlink: function (node) {
                    if (!FS.isLink(node.mode)) {
                        throw new FS.ErrnoError(28);
                    }
                    return node.link;
                },
            },
            stream_ops: {
                read: function (stream, buffer, offset, length, position) {
                    var contents = stream.node.contents;
                    if (position >= stream.node.usedBytes) return 0;
                    var size = Math.min(
                        stream.node.usedBytes - position,
                        length,
                    );
                    assert(size >= 0);
                    if (size > 8 && contents.subarray) {
                        // non-trivial, and typed array
                        buffer.set(
                            contents.subarray(position, position + size),
                            offset,
                        );
                    } else {
                        for (var i = 0; i < size; i++)
                            buffer[offset + i] = contents[position + i];
                    }
                    return size;
                },
                write: function (
                    stream,
                    buffer,
                    offset,
                    length,
                    position,
                    canOwn,
                ) {
                    // The data buffer should be a typed array view
                    assert(!(buffer instanceof ArrayBuffer));

                    if (!length) return 0;
                    var node = stream.node;
                    node.timestamp = Date.now();

                    if (
                        buffer.subarray &&
                        (!node.contents || node.contents.subarray)
                    ) {
                        // This write is from a typed array to a typed array?
                        if (canOwn) {
                            assert(
                                position === 0,
                                "canOwn must imply no weird position inside the file",
                            );
                            node.contents = buffer.subarray(
                                offset,
                                offset + length,
                            );
                            node.usedBytes = length;
                            return length;
                        } else if (node.usedBytes === 0 && position === 0) {
                            // If this is a simple first write to an empty file, do a fast set since we don't need to care about old data.
                            node.contents = buffer.slice(
                                offset,
                                offset + length,
                            );
                            node.usedBytes = length;
                            return length;
                        } else if (position + length <= node.usedBytes) {
                            // Writing to an already allocated and used subrange of the file?
                            node.contents.set(
                                buffer.subarray(offset, offset + length),
                                position,
                            );
                            return length;
                        }
                    }

                    // Appending to an existing file and we need to reallocate, or source data did not come as a typed array.
                    MEMFS.expandFileStorage(node, position + length);
                    if (node.contents.subarray && buffer.subarray) {
                        // Use typed array write which is available.
                        node.contents.set(
                            buffer.subarray(offset, offset + length),
                            position,
                        );
                    } else {
                        for (var i = 0; i < length; i++) {
                            node.contents[position + i] = buffer[offset + i]; // Or fall back to manual write if not.
                        }
                    }
                    node.usedBytes = Math.max(
                        node.usedBytes,
                        position + length,
                    );
                    return length;
                },
                llseek: function (stream, offset, whence) {
                    var position = offset;
                    if (whence === 1) {
                        position += stream.position;
                    } else if (whence === 2) {
                        if (FS.isFile(stream.node.mode)) {
                            position += stream.node.usedBytes;
                        }
                    }
                    if (position < 0) {
                        throw new FS.ErrnoError(28);
                    }
                    return position;
                },
                allocate: function (stream, offset, length) {
                    MEMFS.expandFileStorage(stream.node, offset + length);
                    stream.node.usedBytes = Math.max(
                        stream.node.usedBytes,
                        offset + length,
                    );
                },
                mmap: function (stream, length, position, prot, flags) {
                    if (!FS.isFile(stream.node.mode)) {
                        throw new FS.ErrnoError(43);
                    }
                    var ptr;
                    var allocated;
                    var contents = stream.node.contents;
                    // Only make a new copy when MAP_PRIVATE is specified.
                    if (!(flags & 2) && contents.buffer === HEAP8.buffer) {
                        // We can't emulate MAP_SHARED when the file is not backed by the
                        // buffer we're mapping to (e.g. the HEAP buffer).
                        allocated = false;
                        ptr = contents.byteOffset;
                    } else {
                        // Try to avoid unnecessary slices.
                        if (
                            position > 0 ||
                            position + length < contents.length
                        ) {
                            if (contents.subarray) {
                                contents = contents.subarray(
                                    position,
                                    position + length,
                                );
                            } else {
                                contents = Array.prototype.slice.call(
                                    contents,
                                    position,
                                    position + length,
                                );
                            }
                        }
                        allocated = true;
                        ptr = mmapAlloc(length);
                        if (!ptr) {
                            throw new FS.ErrnoError(48);
                        }
                        HEAP8.set(contents, ptr);
                    }
                    return { ptr: 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_MESSAGES = {
            0: "Success",
            1: "Arg list too long",
            2: "Permission denied",
            3: "Address already in use",
            4: "Address not available",
            5: "Address family not supported by protocol family",
            6: "No more processes",
            7: "Socket already connected",
            8: "Bad file number",
            9: "Trying to read unreadable message",
            10: "Mount device busy",
            11: "Operation canceled",
            12: "No children",
            13: "Connection aborted",
            14: "Connection refused",
            15: "Connection reset by peer",
            16: "File locking deadlock error",
            17: "Destination address required",
            18: "Math arg out of domain of func",
            19: "Quota exceeded",
            20: "File exists",
            21: "Bad address",
            22: "File too large",
            23: "Host is unreachable",
            24: "Identifier removed",
            25: "Illegal byte sequence",
            26: "Connection already in progress",
            27: "Interrupted system call",
            28: "Invalid argument",
            29: "I/O error",
            30: "Socket is already connected",
            31: "Is a directory",
            32: "Too many symbolic links",
            33: "Too many open files",
            34: "Too many links",
            35: "Message too long",
            36: "Multihop attempted",
            37: "File or path name too long",
            38: "Network interface is not configured",
            39: "Connection reset by network",
            40: "Network is unreachable",
            41: "Too many open files in system",
            42: "No buffer space available",
            43: "No such device",
            44: "No such file or directory",
            45: "Exec format error",
            46: "No record locks available",
            47: "The link has been severed",
            48: "Not enough core",
            49: "No message of desired type",
            50: "Protocol not available",
            51: "No space left on device",
            52: "Function not implemented",
            53: "Socket is not connected",
            54: "Not a directory",
            55: "Directory not empty",
            56: "State not recoverable",
            57: "Socket operation on non-socket",
            59: "Not a typewriter",
            60: "No such device or address",
            61: "Value too large for defined data type",
            62: "Previous owner died",
            63: "Not super-user",
            64: "Broken pipe",
            65: "Protocol error",
            66: "Unknown protocol",
            67: "Protocol wrong type for socket",
            68: "Math result not representable",
            69: "Read only file system",
            70: "Illegal seek",
            71: "No such process",
            72: "Stale file handle",
            73: "Connection timed out",
            74: "Text file busy",
            75: "Cross-device link",
            100: "Device not a stream",
            101: "Bad font file fmt",
            102: "Invalid slot",
            103: "Invalid request code",
            104: "No anode",
            105: "Block device required",
            106: "Channel number out of range",
            107: "Level 3 halted",
            108: "Level 3 reset",
            109: "Link number out of range",
            110: "Protocol driver not attached",
            111: "No CSI structure available",
            112: "Level 2 halted",
            113: "Invalid exchange",
            114: "Invalid request descriptor",
            115: "Exchange full",
            116: "No data (for no delay io)",
            117: "Timer expired",
            118: "Out of streams resources",
            119: "Machine is not on the network",
            120: "Package not installed",
            121: "The object is remote",
            122: "Advertise error",
            123: "Srmount error",
            124: "Communication error on send",
            125: "Cross mount point (not really error)",
            126: "Given log. name not unique",
            127: "f.d. invalid for this operation",
            128: "Remote address changed",
            129: "Can   access a needed shared lib",
            130: "Accessing a corrupted shared lib",
            131: ".lib section in a.out corrupted",
            132: "Attempting to link in too many libs",
            133: "Attempting to exec a shared library",
            135: "Streams pipe error",
            136: "Too many users",
            137: "Socket type not supported",
            138: "Not supported",
            139: "Protocol family not supported",
            140: "Can't send after socket shutdown",
            141: "Too many references",
            142: "Host is down",
            148: "No medium (in tape drive)",
            156: "Level 2 not synchronized",
        };

        var ERRNO_CODES = {};

        function demangle(func) {
            warnOnce(
                "warning: build with -sDEMANGLE_SUPPORT to link in libcxxabi demangling",
            );
            return func;
        }
        function demangleAll(text) {
            var regex = /\b_Z[\w\d_]+/g;
            return text.replace(regex, function (x) {
                var y = demangle(x);
                return x === y ? x : y + " [" + x + "]";
            });
        }
        var FS = {
            root: null,
            mounts: [],
            devices: {},
            streams: [],
            nextInode: 1,
            nameTable: null,
            currentPath: "/",
            initialized: false,
            ignorePermissions: true,
            ErrnoError: null,
            genericErrors: {},
            filesystems: null,
            syncFSRequests: 0,
            lookupPath: (path, opts = {}) => {
                path = PATH_FS.resolve(path);

                if (!path) return { path: "", node: null };

                var defaults = {
                    follow_mount: true,
                    recurse_count: 0,
                };
                opts = Object.assign(defaults, opts);

                if (opts.recurse_count > 8) {
                    // max recursive lookup of 8
                    throw new FS.ErrnoError(32);
                }

                // split the absolute path
                var parts = path.split("/").filter((p) => !!p);

                // start at the root
                var current = FS.root;
                var current_path = "/";

                for (var i = 0; i < parts.length; i++) {
                    var islast = i === parts.length - 1;
                    if (islast && opts.parent) {
                        // stop resolving
                        break;
                    }

                    current = FS.lookupNode(current, parts[i]);
                    current_path = PATH.join2(current_path, parts[i]);

                    // jump to the mount's root node if this is a mountpoint
                    if (FS.isMountpoint(current)) {
                        if (!islast || (islast && opts.follow_mount)) {
                            current = current.mounted.root;
                        }
                    }

                    // by default, lookupPath will not follow a symlink if it is the final path component.
                    // setting opts.follow = true will override this behavior.
                    if (!islast || opts.follow) {
                        var count = 0;
                        while (FS.isLink(current.mode)) {
                            var link = FS.readlink(current_path);
                            current_path = PATH_FS.resolve(
                                PATH.dirname(current_path),
                                link,
                            );

                            var lookup = FS.lookupPath(current_path, {
                                recurse_count: opts.recurse_count + 1,
                            });
                            current = lookup.node;

                            if (count++ > 40) {
                                // limit max consecutive symlinks to 40 (SYMLOOP_MAX).
                                throw new FS.ErrnoError(32);
                            }
                        }
                    }
                }

                return { path: current_path, node: current };
            },
            getPath: (node) => {
                var path;
                while (true) {
                    if (FS.isRoot(node)) {
                        var mount = node.mount.mountpoint;
                        if (!path) return mount;
                        return mount[mount.length - 1] !== "/"
                            ? mount + "/" + path
                            : mount + path;
                    }
                    path = path ? node.name + "/" + path : node.name;
                    node = node.parent;
                }
            },
            hashName: (parentid, name) => {
                var hash = 0;

                for (var i = 0; i < name.length; i++) {
                    hash = ((hash << 5) - hash + name.charCodeAt(i)) | 0;
                }
                return ((parentid + hash) >>> 0) % FS.nameTable.length;
            },
            hashAddNode: (node) => {
                var hash = FS.hashName(node.parent.id, node.name);
                node.name_next = FS.nameTable[hash];
                FS.nameTable[hash] = node;
            },
            hashRemoveNode: (node) => {
                var hash = FS.hashName(node.parent.id, node.name);
                if (FS.nameTable[hash] === node) {
                    FS.nameTable[hash] = node.name_next;
                } else {
                    var current = FS.nameTable[hash];
                    while (current) {
                        if (current.name_next === node) {
                            current.name_next = node.name_next;
                            break;
                        }
                        current = current.name_next;
                    }
                }
            },
            lookupNode: (parent, name) => {
                var errCode = FS.mayLookup(parent);
                if (errCode) {
                    throw new FS.ErrnoError(errCode, parent);
                }
                var hash = FS.hashName(parent.id, name);
                for (
                    var node = FS.nameTable[hash];
                    node;
                    node = node.name_next
                ) {
                    var nodeName = node.name;
                    if (node.parent.id === parent.id && nodeName === name) {
                        return node;
                    }
                }
                // if we failed to find it in the cache, call into the VFS
                return FS.lookup(parent, name);
            },
            createNode: (parent, name, mode, rdev) => {
                assert(typeof parent == "object");
                var node = new FS.FSNode(parent, name, mode, rdev);

                FS.hashAddNode(node);

                return node;
            },
            destroyNode: (node) => {
                FS.hashRemoveNode(node);
            },
            isRoot: (node) => {
                return node === node.parent;
            },
            isMountpoint: (node) => {
                return !!node.mounted;
            },
            isFile: (mode) => {
                return (mode & 61440) === 32768;
            },
            isDir: (mode) => {
                return (mode & 61440) === 16384;
            },
            isLink: (mode) => {
                return (mode & 61440) === 40960;
            },
            isChrdev: (mode) => {
                return (mode & 61440) === 8192;
            },
            isBlkdev: (mode) => {
                return (mode & 61440) === 24576;
            },
            isFIFO: (mode) => {
                return (mode & 61440) === 4096;
            },
            isSocket: (mode) => {
                return (mode & 49152) === 49152;
            },
            flagsToPermissionString: (flag) => {
                var perms = ["r", "w", "rw"][flag & 3];
                if (flag & 512) {
                    perms += "w";
                }
                return perms;
            },
            nodePermissions: (node, perms) => {
                if (FS.ignorePermissions) {
                    return 0;
                }
                // return 0 if any user, group or owner bits are set.
                if (perms.includes("r") && !(node.mode & 292)) {
                    return 2;
                } else if (perms.includes("w") && !(node.mode & 146)) {
                    return 2;
                } else if (perms.includes("x") && !(node.mode & 73)) {
                    return 2;
                }
                return 0;
            },
            mayLookup: (dir) => {
                var errCode = FS.nodePermissions(dir, "x");
                if (errCode) return errCode;
                if (!dir.node_ops.lookup) return 2;
                return 0;
            },
            mayCreate: (dir, name) => {
                try {
                    var node = FS.lookupNode(dir, name);
                    return 20;
                } catch (e) {}
                return FS.nodePermissions(dir, "wx");
            },
            mayDelete: (dir, name, isdir) => {
                var node;
                try {
                    node = FS.lookupNode(dir, name);
                } catch (e) {
                    return e.errno;
                }
                var errCode = FS.nodePermissions(dir, "wx");
                if (errCode) {
                    return errCode;
                }
                if (isdir) {
                    if (!FS.isDir(node.mode)) {
                        return 54;
                    }
                    if (FS.isRoot(node) || FS.getPath(node) === FS.cwd()) {
                        return 10;
                    }
                } else {
                    if (FS.isDir(node.mode)) {
                        return 31;
                    }
                }
                return 0;
            },
            mayOpen: (node, flags) => {
                if (!node) {
                    return 44;
                }
                if (FS.isLink(node.mode)) {
                    return 32;
                } else if (FS.isDir(node.mode)) {
                    if (
                        FS.flagsToPermissionString(flags) !== "r" || // opening for write
                        flags & 512
                    ) {
                        // TODO: check for O_SEARCH? (== search for dir only)
                        return 31;
                    }
                }
                return FS.nodePermissions(
                    node,
                    FS.flagsToPermissionString(flags),
                );
            },
            MAX_OPEN_FDS: 4096,
            nextfd: (fd_start = 0, fd_end = FS.MAX_OPEN_FDS) => {
                for (var fd = fd_start; fd <= fd_end; fd++) {
                    if (!FS.streams[fd]) {
                        return fd;
                    }
                }
                throw new FS.ErrnoError(33);
            },
            getStream: (fd) => FS.streams[fd],
            createStream: (stream, fd_start, fd_end) => {
                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);
                var fd = FS.nextfd(fd_start, fd_end);
                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,
                };
            },
            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",
                );
            },
        };

        /**
         * 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) : "";
        }
        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_chdir(path) {
            try {
                path = SYSCALLS.getStr(path);
                FS.chdir(path);
                return 0;
            } 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 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 ___syscall_getcwd(buf, size) {
            try {
                if (size === 0) return -28;
                var cwd = FS.cwd();
                var cwdLengthInBytes = lengthBytesUTF8(cwd) + 1;
                if (size < cwdLengthInBytes) return -68;
                stringToUTF8(cwd, buf, size);
                return cwdLengthInBytes;
            } catch (e) {
                if (typeof FS == "undefined" || !(e.name === "ErrnoError"))
                    throw e;
                return -e.errno;
            }
        }

        function ___syscall_getdents64(fd, dirp, count) {
            try {
                var stream = SYSCALLS.getStreamFromFD(fd);
                if (!stream.getdents) {
                    stream.getdents = FS.readdir(stream.path);
                }

                var struct_size = 280;
                var pos = 0;
                var off = FS.llseek(stream, 0, 1);

                var idx = Math.floor(off / struct_size);

                while (
                    idx < stream.getdents.length &&
                    pos + struct_size <= count
                ) {
                    var id;
                    var type;
                    var name = stream.getdents[idx];
                    if (name === ".") {
                        id = stream.node.id;
                        type = 4; // DT_DIR
                    } else if (name === "..") {
                        var lookup = FS.lookupPath(stream.path, {
                            parent: true,
                        });
                        id = lookup.node.id;
                        type = 4; // DT_DIR
                    } else {
                        var child = FS.lookupNode(stream.node, name);
                        id = child.id;
                        type = FS.isChrdev(child.mode)
                            ? 2 // DT_CHR, character device.
                            : FS.isDir(child.mode)
                            ? 4 // DT_DIR, directory.
                            : FS.isLink(child.mode)
                            ? 10 // DT_LNK, symbolic link.
                            : 8; // DT_REG, regular file.
                    }
                    assert(id);
                    (tempI64 = [
                        id >>> 0,
                        ((tempDouble = id),
                        +Math.abs(tempDouble) >= 1.0
                            ? tempDouble > 0.0
                                ? +Math.floor(tempDouble / 4294967296.0) >>> 0
                                : ~~+Math.ceil(
                                      (tempDouble - +(~~tempDouble >>> 0)) /
                                          4294967296.0,
                                  ) >>> 0
                            : 0),
                    ]),
                        (HEAP32[(dirp + pos) >> 2] = tempI64[0]),
                        (HEAP32[(dirp + pos + 4) >> 2] = tempI64[1]);
                    (tempI64 = [
                        ((idx + 1) * struct_size) >>> 0,
                        ((tempDouble = (idx + 1) * struct_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[(dirp + pos + 8) >> 2] = tempI64[0]),
                        (HEAP32[(dirp + pos + 12) >> 2] = tempI64[1]);
                    HEAP16[(dirp + pos + 16) >> 1] = 280;
                    HEAP8[(dirp + pos + 18) >> 0] = type;
                    stringToUTF8(name, dirp + pos + 19, 256);
                    pos += struct_size;
                    idx += 1;
                }
                FS.llseek(stream, idx * struct_size, 0);
                return pos;
            } 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_mkdirat(dirfd, path, mode) {
            try {
                path = SYSCALLS.getStr(path);
                path = SYSCALLS.calculateAt(dirfd, path);
                // remove a trailing slash, if one - /a/b/ has basename of '', but
                // we want to create b in the context of this function
                path = PATH.normalize(path);
                if (path[path.length - 1] === "/")
                    path = path.substr(0, path.length - 1);
                FS.mkdir(path, mode, 0);
                return 0;
            } 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_poll(fds, nfds, timeout) {
            try {
                var nonzero = 0;
                for (var i = 0; i < nfds; i++) {
                    var pollfd = fds + 8 * i;
                    var fd = HEAP32[pollfd >> 2];
                    var events = HEAP16[(pollfd + 4) >> 1];
                    var mask = 32;
                    var stream = FS.getStream(fd);
                    if (stream) {
                        mask = SYSCALLS.DEFAULT_POLLMASK;
                        if (stream.stream_ops.poll) {
                            mask = stream.stream_ops.poll(stream);
                        }
                    }
                    mask &= events | 8 | 16;
                    if (mask) nonzero++;
                    HEAP16[(pollfd + 6) >> 1] = mask;
                }
                return nonzero;
            } catch (e) {
                if (typeof FS == "undefined" || !(e.name === "ErrnoError"))
                    throw e;
                return -e.errno;
            }
        }

        function ___syscall_renameat(olddirfd, oldpath, newdirfd, newpath) {
            try {
                oldpath = SYSCALLS.getStr(oldpath);
                newpath = SYSCALLS.getStr(newpath);
                oldpath = SYSCALLS.calculateAt(olddirfd, oldpath);
                newpath = SYSCALLS.calculateAt(newdirfd, newpath);
                FS.rename(oldpath, newpath);
                return 0;
            } catch (e) {
                if (typeof FS == "undefined" || !(e.name === "ErrnoError"))
                    throw e;
                return -e.errno;
            }
        }

        function ___syscall_rmdir(path) {
            try {
                path = SYSCALLS.getStr(path);
                FS.rmdir(path);
                return 0;
            } 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_statfs64(path, size, buf) {
            try {
                path = SYSCALLS.getStr(path);
                assert(size === 64);
                // NOTE: None of the constants here are true. We're just returning safe and
                //       sane values.
                HEAP32[(buf + 4) >> 2] = 4096;
                HEAP32[(buf + 40) >> 2] = 4096;
                HEAP32[(buf + 8) >> 2] = 1000000;
                HEAP32[(buf + 12) >> 2] = 500000;
                HEAP32[(buf + 16) >> 2] = 500000;
                HEAP32[(buf + 20) >> 2] = FS.nextInode;
                HEAP32[(buf + 24) >> 2] = 1000000;
                HEAP32[(buf + 28) >> 2] = 42;
                HEAP32[(buf + 44) >> 2] = 2; // ST_NOSUID
                HEAP32[(buf + 36) >> 2] = 255;
                return 0;
            } 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 __emscripten_throw_longjmp() {
            throw Infinity;
        }

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

        function getHeapMax() {
            return HEAPU8.length;
        }

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

        function _emscripten_scan_registers(func) {
            throw "Please compile your program with async support in order to use asynchronous operations like emscripten_scan_registers";
        }

        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 _fd_read(fd, iov, iovcnt, pnum) {
            try {
                var stream = SYSCALLS.getStreamFromFD(fd);
                var num = doReadv(stream, iov, iovcnt);
                HEAPU32[pnum >> 2] = num;
                return 0;
            } catch (e) {
                if (typeof FS == "undefined" || !(e.name === "ErrnoError"))
                    throw e;
                return e.errno;
            }
        }

        function convertI32PairToI53Checked(lo, hi) {
            assert(lo == lo >>> 0 || lo == (lo | 0)); // lo should either be a i32 or a u32
            assert(hi === (hi | 0)); // hi should be a i32
            return (hi + 0x200000) >>> 0 < 0x400001 - !!lo
                ? (lo >>> 0) + hi * 4294967296
                : NaN;
        }

        function _fd_seek(fd, offset_low, offset_high, whence, newOffset) {
            try {
                var offset = convertI32PairToI53Checked(
                    offset_low,
                    offset_high,
                );
                if (isNaN(offset)) return 61;
                var stream = SYSCALLS.getStreamFromFD(fd);
                FS.llseek(stream, offset, whence);
                (tempI64 = [
                    stream.position >>> 0,
                    ((tempDouble = stream.position),
                    +Math.abs(tempDouble) >= 1.0
                        ? tempDouble > 0.0
                            ? +Math.floor(tempDouble / 4294967296.0) >>> 0
                            : ~~+Math.ceil(
                                  (tempDouble - +(~~tempDouble >>> 0)) /
                                      4294967296.0,
                              ) >>> 0
                        : 0),
                ]),
                    (HEAP32[newOffset >> 2] = tempI64[0]),
                    (HEAP32[(newOffset + 4) >> 2] = tempI64[1]);
                if (stream.getdents && offset === 0 && whence === 0)
                    stream.getdents = null; // reset readdir state
                return 0;
            } catch (e) {
                if (typeof FS == "undefined" || !(e.name === "ErrnoError"))
                    throw e;
                return e.errno;
            }
        }

        function _fd_sync(fd) {
            try {
                var stream = SYSCALLS.getStreamFromFD(fd);
                if (stream.stream_ops && stream.stream_ops.fsync) {
                    return stream.stream_ops.fsync(stream);
                }
                return 0; // we can't do anything synchronously; the in-memory FS is already synced to
            } 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_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 _mp_js_hook() {
            if (typeof window === "undefined") {
                var mp_interrupt_char = Module.ccall(
                    "mp_hal_get_interrupt_char",
                    "number",
                    ["number"],
                    ["null"],
                );
                var fs = require("fs");

                var buf = Buffer.alloc(1);
                try {
                    var n = fs.readSync(process.stdin.fd, buf, 0, 1);
                    if (n > 0) {
                        if (buf[0] == mp_interrupt_char) {
                            Module.ccall(
                                "mp_sched_keyboard_interrupt",
                                "null",
                                ["null"],
                                ["null"],
                            );
                        } else {
                            process.stdout.write(String.fromCharCode(buf[0]));
                        }
                    }
                } catch (e) {
                    if (e.code === "EAGAIN") {
                    } else {
                        throw e;
                    }
                }
            }
        }

        function _mp_js_ticks_ms() {
            return Date.now() - MP_JS_EPOCH;
        }

        function _mp_js_write(ptr, len) {
            const buffer = HEAPU8.subarray(ptr, ptr + len);
            if (typeof window === "undefined") {
                process.stdout.write(buffer);
            } else {
                const printEvent = new CustomEvent("micropython-print", {
                    detail: buffer,
                });
                document.dispatchEvent(printEvent);
            }
        }

        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 getCFunc(ident) {
            var func = Module["_" + ident]; // closure exported function
            assert(
                func,
                "Cannot call unknown function " +
                    ident +
                    ", make sure it is exported",
            );
            return func;
        }

        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 stringToUTF8OnStack(str) {
            var size = lengthBytesUTF8(str) + 1;
            var ret = stackAlloc(size);
            stringToUTF8(str, ret, size);
            return ret;
        }

        /**
         * @param {string|null=} returnType
         * @param {Array=} argTypes
         * @param {Arguments|Array=} args
         * @param {Object=} opts
         */
        function ccall(ident, returnType, argTypes, args, opts) {
            // For fast lookup of conversion functions
            var toC = {
                string: (str) => {
                    var ret = 0;
                    if (str !== null && str !== undefined && str !== 0) {
                        // null string
                        // at most 4 bytes per UTF-8 code point, +1 for the trailing '\0'
                        ret = stringToUTF8OnStack(str);
                    }
                    return ret;
                },
                array: (arr) => {
                    var ret = stackAlloc(arr.length);
                    writeArrayToMemory(arr, ret);
                    return ret;
                },
            };

            function convertReturnValue(ret) {
                if (returnType === "string") {
                    return UTF8ToString(ret);
                }
                if (returnType === "boolean") return Boolean(ret);
                return ret;
            }

            var func = getCFunc(ident);
            var cArgs = [];
            var stack = 0;
            assert(
                returnType !== "array",
                'Return type should not be "array".',
            );
            if (args) {
                for (var i = 0; i < args.length; i++) {
                    var converter = toC[argTypes[i]];
                    if (converter) {
                        if (stack === 0) stack = stackSave();
                        cArgs[i] = converter(args[i]);
                    } else {
                        cArgs[i] = args[i];
                    }
                }
            }
            var ret = func.apply(null, cArgs);
            function onDone(ret) {
                if (stack !== 0) stackRestore(stack);
                return convertReturnValue(ret);
            }

            ret = onDone(ret);
            return ret;
        }

        /**
         * @param {string=} returnType
         * @param {Array=} argTypes
         * @param {Object=} opts
         */
        function cwrap(ident, returnType, argTypes, opts) {
            return function () {
                return ccall(ident, returnType, argTypes, arguments, opts);
            };
        }

        var FSNode = /** @constructor */ function (parent, name, mode, rdev) {
            if (!parent) {
                parent = this; // root node sets parent to itself
            }
            this.parent = parent;
            this.mount = parent.mount;
            this.mounted = null;
            this.id = FS.nextInode++;
            this.name = name;
            this.mode = mode;
            this.node_ops = {};
            this.stream_ops = {};
            this.rdev = rdev;
        };
        var readMode = 292 /*292*/ | 73; /*73*/
        var writeMode = 146; /*146*/
        Object.defineProperties(FSNode.prototype, {
            read: {
                get: /** @this{FSNode} */ function () {
                    return (this.mode & readMode) === readMode;
                },
                set: /** @this{FSNode} */ function (val) {
                    val ? (this.mode |= readMode) : (this.mode &= ~readMode);
                },
            },
            write: {
                get: /** @this{FSNode} */ function () {
                    return (this.mode & writeMode) === writeMode;
                },
                set: /** @this{FSNode} */ function (val) {
                    val ? (this.mode |= writeMode) : (this.mode &= ~writeMode);
                },
            },
            isFolder: {
                get: /** @this{FSNode} */ function () {
                    return FS.isDir(this.mode);
                },
            },
            isDevice: {
                get: /** @this{FSNode} */ function () {
                    return FS.isChrdev(this.mode);
                },
            },
        });
        FS.FSNode = FSNode;
        FS.createPreloadedFile = FS_createPreloadedFile;
        FS.staticInit();
        ERRNO_CODES = {
            EPERM: 63,
            ENOENT: 44,
            ESRCH: 71,
            EINTR: 27,
            EIO: 29,
            ENXIO: 60,
            E2BIG: 1,
            ENOEXEC: 45,
            EBADF: 8,
            ECHILD: 12,
            EAGAIN: 6,
            EWOULDBLOCK: 6,
            ENOMEM: 48,
            EACCES: 2,
            EFAULT: 21,
            ENOTBLK: 105,
            EBUSY: 10,
            EEXIST: 20,
            EXDEV: 75,
            ENODEV: 43,
            ENOTDIR: 54,
            EISDIR: 31,
            EINVAL: 28,
            ENFILE: 41,
            EMFILE: 33,
            ENOTTY: 59,
            ETXTBSY: 74,
            EFBIG: 22,
            ENOSPC: 51,
            ESPIPE: 70,
            EROFS: 69,
            EMLINK: 34,
            EPIPE: 64,
            EDOM: 18,
            ERANGE: 68,
            ENOMSG: 49,
            EIDRM: 24,
            ECHRNG: 106,
            EL2NSYNC: 156,
            EL3HLT: 107,
            EL3RST: 108,
            ELNRNG: 109,
            EUNATCH: 110,
            ENOCSI: 111,
            EL2HLT: 112,
            EDEADLK: 16,
            ENOLCK: 46,
            EBADE: 113,
            EBADR: 114,
            EXFULL: 115,
            ENOANO: 104,
            EBADRQC: 103,
            EBADSLT: 102,
            EDEADLOCK: 16,
            EBFONT: 101,
            ENOSTR: 100,
            ENODATA: 116,
            ETIME: 117,
            ENOSR: 118,
            ENONET: 119,
            ENOPKG: 120,
            EREMOTE: 121,
            ENOLINK: 47,
            EADV: 122,
            ESRMNT: 123,
            ECOMM: 124,
            EPROTO: 65,
            EMULTIHOP: 36,
            EDOTDOT: 125,
            EBADMSG: 9,
            ENOTUNIQ: 126,
            EBADFD: 127,
            EREMCHG: 128,
            ELIBACC: 129,
            ELIBBAD: 130,
            ELIBSCN: 131,
            ELIBMAX: 132,
            ELIBEXEC: 133,
            ENOSYS: 52,
            ENOTEMPTY: 55,
            ENAMETOOLONG: 37,
            ELOOP: 32,
            EOPNOTSUPP: 138,
            EPFNOSUPPORT: 139,
            ECONNRESET: 15,
            ENOBUFS: 42,
            EAFNOSUPPORT: 5,
            EPROTOTYPE: 67,
            ENOTSOCK: 57,
            ENOPROTOOPT: 50,
            ESHUTDOWN: 140,
            ECONNREFUSED: 14,
            EADDRINUSE: 3,
            ECONNABORTED: 13,
            ENETUNREACH: 40,
            ENETDOWN: 38,
            ETIMEDOUT: 73,
            EHOSTDOWN: 142,
            EHOSTUNREACH: 23,
            EINPROGRESS: 26,
            EALREADY: 7,
            EDESTADDRREQ: 17,
            EMSGSIZE: 35,
            EPROTONOSUPPORT: 66,
            ESOCKTNOSUPPORT: 137,
            EADDRNOTAVAIL: 4,
            ENETRESET: 39,
            EISCONN: 30,
            ENOTCONN: 53,
            ETOOMANYREFS: 141,
            EUSERS: 136,
            EDQUOT: 19,
            ESTALE: 72,
            ENOTSUP: 138,
            ENOMEDIUM: 148,
            EILSEQ: 25,
            EOVERFLOW: 61,
            ECANCELED: 11,
            ENOTRECOVERABLE: 56,
            EOWNERDEAD: 62,
            ESTRPIPE: 135,
        };
        var MP_JS_EPOCH = Date.now();
        function checkIncomingModuleAPI() {
            ignoredModuleProp("fetchSettings");
        }
        var wasmImports = {
            __syscall_chdir: ___syscall_chdir,
            __syscall_fstat64: ___syscall_fstat64,
            __syscall_getcwd: ___syscall_getcwd,
            __syscall_getdents64: ___syscall_getdents64,
            __syscall_lstat64: ___syscall_lstat64,
            __syscall_mkdirat: ___syscall_mkdirat,
            __syscall_newfstatat: ___syscall_newfstatat,
            __syscall_openat: ___syscall_openat,
            __syscall_poll: ___syscall_poll,
            __syscall_renameat: ___syscall_renameat,
            __syscall_rmdir: ___syscall_rmdir,
            __syscall_stat64: ___syscall_stat64,
            __syscall_statfs64: ___syscall_statfs64,
            __syscall_unlinkat: ___syscall_unlinkat,
            _emscripten_throw_longjmp: __emscripten_throw_longjmp,
            call0: call0,
            call0_kwarg: call0_kwarg,
            call1: call1,
            call1_kwarg: call1_kwarg,
            call2: call2,
            emscripten_memcpy_big: _emscripten_memcpy_big,
            emscripten_resize_heap: _emscripten_resize_heap,
            emscripten_scan_registers: _emscripten_scan_registers,
            fd_close: _fd_close,
            fd_read: _fd_read,
            fd_seek: _fd_seek,
            fd_sync: _fd_sync,
            fd_write: _fd_write,
            invoke_i: invoke_i,
            invoke_ii: invoke_ii,
            invoke_iii: invoke_iii,
            invoke_iiii: invoke_iiii,
            invoke_iiiii: invoke_iiiii,
            invoke_v: invoke_v,
            invoke_vi: invoke_vi,
            invoke_vii: invoke_vii,
            invoke_viii: invoke_viii,
            invoke_viiii: invoke_viiii,
            js_callable_proxy: js_callable_proxy,
            js_get_len: js_get_len,
            js_reflect_construct: js_reflect_construct,
            js_subscr_int: js_subscr_int,
            js_subscr_load: js_subscr_load,
            js_subscr_store: js_subscr_store,
            load_global: load_global,
            lookup_attr: lookup_attr,
            mp_js_hook: _mp_js_hook,
            mp_js_ticks_ms: _mp_js_ticks_ms,
            mp_js_write: _mp_js_write,
            store_attr: store_attr,
        };
        var asm = createWasm();
        /** @type {function(...*):?} */
        var ___wasm_call_ctors = createExportWrapper("__wasm_call_ctors");
        /** @type {function(...*):?} */
        var _malloc = (Module["_malloc"] = createExportWrapper("malloc"));
        /** @type {function(...*):?} */
        var _free = (Module["_free"] = createExportWrapper("free"));
        /** @type {function(...*):?} */
        var _mp_sched_keyboard_interrupt = (Module[
            "_mp_sched_keyboard_interrupt"
        ] = createExportWrapper("mp_sched_keyboard_interrupt"));
        /** @type {function(...*):?} */
        var ___errno_location = createExportWrapper("__errno_location");
        /** @type {function(...*):?} */
        var _mp_js_register_js_module = (Module["_mp_js_register_js_module"] =
            createExportWrapper("mp_js_register_js_module"));
        /** @type {function(...*):?} */
        var _mp_js_do_import = (Module["_mp_js_do_import"] =
            createExportWrapper("mp_js_do_import"));
        /** @type {function(...*):?} */
        var _mp_js_do_exec = (Module["_mp_js_do_exec"] =
            createExportWrapper("mp_js_do_exec"));
        /** @type {function(...*):?} */
        var _mp_obj_jsobj_callback_proxy = (Module[
            "_mp_obj_jsobj_callback_proxy"
        ] = createExportWrapper("mp_obj_jsobj_callback_proxy"));
        /** @type {function(...*):?} */
        var _proxy_c_init = (Module["_proxy_c_init"] =
            createExportWrapper("proxy_c_init"));
        /** @type {function(...*):?} */
        var _proxy_c_to_js_call = (Module["_proxy_c_to_js_call"] =
            createExportWrapper("proxy_c_to_js_call"));
        /** @type {function(...*):?} */
        var _proxy_c_to_js_lookup_attr = (Module["_proxy_c_to_js_lookup_attr"] =
            createExportWrapper("proxy_c_to_js_lookup_attr"));
        /** @type {function(...*):?} */
        var _mp_js_do_str = (Module["_mp_js_do_str"] =
            createExportWrapper("mp_js_do_str"));
        /** @type {function(...*):?} */
        var _mp_js_process_char = (Module["_mp_js_process_char"] =
            createExportWrapper("mp_js_process_char"));
        /** @type {function(...*):?} */
        var _mp_js_init = (Module["_mp_js_init"] =
            createExportWrapper("mp_js_init"));
        /** @type {function(...*):?} */
        var _mp_js_init_repl = (Module["_mp_js_init_repl"] =
            createExportWrapper("mp_js_init_repl"));
        /** @type {function(...*):?} */
        var _mp_hal_get_interrupt_char = (Module["_mp_hal_get_interrupt_char"] =
            createExportWrapper("mp_hal_get_interrupt_char"));
        /** @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_current = function () {
            return (_emscripten_stack_get_current =
                Module["asm"]["emscripten_stack_get_current"]).apply(
                null,
                arguments,
            );
        };

        /** @type {function(...*):?} */
        var _fflush = (Module["_fflush"] = createExportWrapper("fflush"));
        /** @type {function(...*):?} */
        var _setThrew = createExportWrapper("setThrew");
        /** @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_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");
        var ___start_em_js = (Module["___start_em_js"] = 169992);
        var ___stop_em_js = (Module["___stop_em_js"] = 173353);
        function invoke_ii(index, a1) {
            var sp = stackSave();
            try {
                return getWasmTableEntry(index)(a1);
            } catch (e) {
                stackRestore(sp);
                if (e !== e + 0) 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 !== e + 0) 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 !== e + 0) throw e;
                _setThrew(1, 0);
            }
        }

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

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

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

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

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

        Module["ccall"] = ccall;
        Module["cwrap"] = cwrap;
        Module["setValue"] = setValue;
        Module["getValue"] = getValue;
        Module["PATH"] = PATH;
        Module["PATH_FS"] = PATH_FS;
        Module["UTF8ToString"] = UTF8ToString;
        Module["stringToUTF8"] = stringToUTF8;
        Module["lengthBytesUTF8"] = lengthBytesUTF8;
        Module["FS"] = FS;
        var missingLibrarySymbols = [
            "exitJS",
            "emscripten_realloc_buffer",
            "isLeapYear",
            "ydayFromDate",
            "arraySum",
            "addDays",
            "setErrNo",
            "inetPton4",
            "inetNtop4",
            "inetPton6",
            "inetNtop6",
            "readSockaddr",
            "writeSockaddr",
            "getHostByName",
            "traverseStack",
            "getCallstack",
            "emscriptenLog",
            "convertPCtoSourceLocation",
            "readEmAsmArgs",
            "jstoi_q",
            "jstoi_s",
            "getExecutableName",
            "listenOnce",
            "autoResumeAudioContext",
            "dynCallLegacy",
            "getDynCaller",
            "dynCall",
            "handleException",
            "runtimeKeepalivePush",
            "runtimeKeepalivePop",
            "callUserCallback",
            "maybeExit",
            "safeSetTimeout",
            "asmjsMangle",
            "HandleAllocator",
            "getNativeTypeSize",
            "STACK_SIZE",
            "STACK_ALIGN",
            "POINTER_SIZE",
            "ASSERTIONS",
            "writeI53ToI64",
            "writeI53ToI64Clamped",
            "writeI53ToI64Signaling",
            "writeI53ToU64Clamped",
            "writeI53ToU64Signaling",
            "readI53FromI64",
            "readI53FromU64",
            "convertI32PairToI53",
            "convertU32PairToI53",
            "uleb128Encode",
            "sigToWasmTypes",
            "generateFuncType",
            "convertJsFunctionToWasm",
            "getEmptyTableSlot",
            "updateTableMap",
            "getFunctionAddress",
            "addFunction",
            "removeFunction",
            "reallyNegative",
            "unSign",
            "strLen",
            "reSign",
            "formatString",
            "intArrayToString",
            "AsciiToString",
            "stringToAscii",
            "UTF16ToString",
            "stringToUTF16",
            "lengthBytesUTF16",
            "UTF32ToString",
            "stringToUTF32",
            "lengthBytesUTF32",
            "stringToNewUTF8",
            "getSocketFromFD",
            "getSocketAddress",
            "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",
            "jsStackTrace",
            "stackTrace",
            "getEnvStrings",
            "checkWasiClock",
            "wasiRightsToMuslOFlags",
            "wasiOFlagsToMuslOFlags",
            "createDyncallWrapper",
            "setImmediateWrapped",
            "clearImmediateWrapped",
            "polyfillSetImmediate",
            "getPromise",
            "makePromise",
            "idsToPromises",
            "makePromiseCallback",
            "ExceptionInfo",
            "setMainLoop",
            "_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",
            "ALLOC_NORMAL",
            "ALLOC_STACK",
            "allocate",
            "writeStringToMemory",
            "writeAsciiToMemory",
        ];
        missingLibrarySymbols.forEach(missingLibrarySymbol);

        var unexportedSymbols = [
            "run",
            "addOnPreRun",
            "addOnInit",
            "addOnPreMain",
            "addOnExit",
            "addOnPostRun",
            "addRunDependency",
            "removeRunDependency",
            "FS_createFolder",
            "FS_createPath",
            "FS_createDataFile",
            "FS_createLazyFile",
            "FS_createLink",
            "FS_createDevice",
            "FS_unlink",
            "out",
            "err",
            "callMain",
            "abort",
            "keepRuntimeAlive",
            "wasmMemory",
            "stackAlloc",
            "stackSave",
            "stackRestore",
            "getTempRet0",
            "setTempRet0",
            "writeStackCookie",
            "checkStackCookie",
            "ptrToString",
            "zeroMemory",
            "getHeapMax",
            "abortOnCannotGrowMemory",
            "ENV",
            "MONTH_DAYS_REGULAR",
            "MONTH_DAYS_LEAP",
            "MONTH_DAYS_REGULAR_CUMULATIVE",
            "MONTH_DAYS_LEAP_CUMULATIVE",
            "ERRNO_CODES",
            "ERRNO_MESSAGES",
            "DNS",
            "Protocols",
            "Sockets",
            "initRandomFill",
            "randomFill",
            "timers",
            "warnOnce",
            "UNWIND_CACHE",
            "readEmAsmArgsArray",
            "asyncLoad",
            "alignMemory",
            "mmapAlloc",
            "convertI32PairToI53Checked",
            "getCFunc",
            "freeTableIndexes",
            "functionsInTableMap",
            "UTF8Decoder",
            "UTF8ArrayToString",
            "stringToUTF8Array",
            "intArrayFromString",
            "UTF16Decoder",
            "stringToUTF8OnStack",
            "writeArrayToMemory",
            "SYSCALLS",
            "JSEvents",
            "specialHTMLTargets",
            "currentFullscreenStrategy",
            "restoreOldWindowedStyle",
            "demangle",
            "demangleAll",
            "ExitStatus",
            "doReadv",
            "doWritev",
            "dlopenMissingError",
            "promiseMap",
            "uncaughtExceptionCount",
            "exceptionLast",
            "exceptionCaught",
            "Browser",
            "wget",
            "preloadPlugins",
            "FS_createPreloadedFile",
            "FS_modeStringToFlags",
            "FS_getMode",
            "MEMFS",
            "TTY",
            "PIPEFS",
            "SOCKFS",
            "tempFixedLengthArray",
            "miniTempWebGLFloatBuffers",
            "miniTempWebGLIntBuffers",
            "GL",
            "emscripten_webgl_power_preferences",
            "AL",
            "GLUT",
            "EGL",
            "GLEW",
            "IDBStore",
            "SDL",
            "SDL_gfx",
            "GLFW",
            "allocateUTF8",
            "allocateUTF8OnStack",
        ];
        unexportedSymbols.forEach(unexportedRuntimeSymbol);

        var calledRun;

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

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

        function run() {
            if (runDependencies > 0) {
                return;
            }

            stackCheckInit();

            preRun();

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

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

                if (ABORT) return;

                initRuntime();

                readyPromiseResolve(Module);
                if (Module["onRuntimeInitialized"])
                    Module["onRuntimeInitialized"]();

                assert(
                    !Module["_main"],
                    'compiled without a main, but one is present. if you added it from JS, use Module["onRuntimeInitialized"]',
                );

                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()();
            }
        }

        run();

        // end include: postamble.js

        return _createMicroPythonModule.ready;
    };
})();
if (typeof exports === "object" && typeof module === "object")
    module.exports = _createMicroPythonModule;
else if (typeof define === "function" && define["amd"])
    define([], function () {
        return _createMicroPythonModule;
    });
else if (typeof exports === "object")
    exports["_createMicroPythonModule"] = _createMicroPythonModule;
export async function loadMicroPython(options) {
    const { heapsize, url } = Object.assign({ heapsize: 1024 * 1024 }, options);
    const Module = {};
    Module.locateFile = (path, scriptDirectory) => url || path;
    const moduleLoaded = new Promise((r) => (Module.postRun = r));
    _createMicroPythonModule(Module);
    await moduleLoaded;
    globalThis.Module = Module;
    proxy_js_init();
    Module.ccall("mp_js_init", "null", ["number"], [heapsize]);
    Module.ccall("proxy_c_init", "null", [], []);
    return {
        _module: Module,
        FS: Module.FS,
        globals: {}, // TODO should be a combination of __main__.__dict__ and builtins.__dict__
        registerComlink(comlink) {},
        registerJsModule(name, module) {
            const value = Module._malloc(3 * 4);
            convert_js_to_mp_obj_jsside(module, value);
            Module.ccall(
                "mp_js_register_js_module",
                "null",
                ["string", "pointer"],
                [name, value],
            );
            Module._free(value);
        },
        pyimport(name) {
            const value = Module._malloc(3 * 4);
            Module.ccall(
                "mp_js_do_import",
                "null",
                ["string", "pointer"],
                [name, value],
            );
            return convert_mp_to_js_obj_jsside_with_free(value);
        },
        runPython(code) {
            const value = Module._malloc(3 * 4);
            Module.ccall(
                "mp_js_do_exec",
                "number",
                ["string", "pointer"],
                [code, value],
            );
            return convert_mp_to_js_obj_jsside_with_free(value);
        },
    };
}

globalThis.loadMicroPython = loadMicroPython;
class PythonError extends Error {}
Object.defineProperty(PythonError.prototype, "name", { value: "PythonError" });

function proxy_js_init() {
    globalThis.proxy_js_ref = [0];
}

function proxy_call_python(target, argumentsList) {
    console.debug("APPLY", target, argumentsList);
    let args = 0;

    // TODO: is this the correct thing to do, strip trailing "undefined" args?
    while (
        argumentsList.length > 0 &&
        argumentsList[argumentsList.length - 1] === undefined
    ) {
        argumentsList.pop();
    }

    if (argumentsList.length > 0) {
        // TODO use stackAlloc/stackRestore?
        args = Module._malloc(argumentsList.length * 3 * 4);
        for (let i in argumentsList) {
            convert_js_to_mp_obj_jsside(argumentsList[i], args + i * 3 * 4);
        }
    }
    const value = Module._malloc(3 * 4);
    Module.ccall(
        "proxy_c_to_js_call",
        "null",
        ["number", "number", "number", "pointer"],
        [target, argumentsList.length, args, value],
    );
    if (argumentsList.length > 0) {
        Module._free(args);
    }
    return convert_mp_to_js_obj_jsside_with_free(value);
}

const proxy_handler = {
    isExtensible() {
        return true;
    },
    has(target, prop) {
        throw Error("has not implemented");
    },
    get(target, prop) {
        console.debug("GET", target._ref, prop);
        if (prop in target || typeof prop === "symbol") {
            return Reflect.get(target, prop);
        }
        const value = Module._malloc(3 * 4);
        Module.ccall(
            "proxy_c_to_js_lookup_attr",
            "number",
            ["number", "string", "pointer"],
            [target._ref, prop, value],
        );
        return convert_mp_to_js_obj_jsside_with_free(value);
    },
    set(target, prop, value) {
        console.debug("SET", target, prop, value);
        if (typeof prop === "symbol") {
            return Reflect.set(target, prop, value);
        }
        throw Error("set not implemented");
        return true;
    },
    deleteProperty(target, prop) {
        throw Error("deleteProperty not implemented");
    },
    ownKeys(target) {
        throw Error("ownKeys not implemented");
    },
};

function convert_js_to_mp_obj_jsside(js_obj, out) {
    let kind;
    if (js_obj === null) {
        kind = 1;
    } else if (typeof js_obj === "boolean") {
        kind = 2;
        Module.setValue(out + 4, js_obj, "i32");
    } else if (typeof js_obj === "number") {
        kind = 3;
        Module.setValue(out + 4, js_obj, "i32");
    } else if (typeof js_obj === "string") {
        kind = 4;
        const len = Module.lengthBytesUTF8(js_obj);
        const buf = Module._malloc(len + 1);
        Module.stringToUTF8(js_obj, buf, len + 1);
        Module.setValue(out + 4, len, "i32");
        Module.setValue(out + 8, buf, "i32");
    } else if (typeof js_obj === "object" && "_ref" in js_obj) {
        // Is this our Proxy object??
        throw new Error("convert_js_to_mp_obj_jsside: not implemented");
    } else {
        kind = 5;
        const id = proxy_js_ref.length;
        proxy_js_ref[id] = js_obj;
        Module.setValue(out + 4, id, "i32");
    }
    Module.setValue(out + 0, kind, "i32");
    console.debug(
        "convert_js_to_mp_obj_jsside",
        js_obj,
        out,
        "->",
        kind,
        Module.getValue(out + 4, "i32"),
    );
}

function convert_mp_to_js_obj_jsside(value) {
    const kind = Module.getValue(value, "i32");
    let obj;
    if (kind == -1) {
        // Exception
        const str_len = Module.getValue(value + 4, "i32");
        const str_ptr = Module.getValue(value + 8, "i32");
        const str = Module.UTF8ToString(str_ptr, str_len);
        Module._free(str_ptr);
        console.error("MicroPython exception:", str);
        throw new PythonError(str);
    }
    if (kind == 0) {
        // MP_OBJ_NULL
        throw new Error("NULL object");
    } else if (kind == 1) {
        // None
        obj = null;
    } else if (kind == 2) {
        // bool
        obj = Module.getValue(value + 4, "i32") ? true : false;
    } else if (kind == 3) {
        // int
        obj = Module.getValue(value + 4, "i32");
    } else if (kind == 4) {
        // str
        const str_len = Module.getValue(value + 4, "i32");
        const str_ptr = Module.getValue(value + 8, "i32");
        obj = Module.UTF8ToString(str_ptr, str_len);
    } else if (kind == 7) {
        // js obj
        const id = Module.getValue(value + 4, "i32");
        obj = proxy_js_ref[id];
    } else {
        // obj
        const id = Module.getValue(value + 4, "i32");
        if (kind == 5) {
            obj = function (...args) {
                return proxy_call_python(id, args);
            };
        } else {
            let target = {};
            target._ref = id;
            obj = new Proxy(target, proxy_handler);
        }
    }
    console.debug(
        "convert_mp_to_js_obj_jsside",
        value,
        kind,
        "->",
        obj,
        kind == 5 ? Module.getValue(value + 4, "i32") : "",
    );
    return obj;
}

function convert_mp_to_js_obj_jsside_with_free(value) {
    const ret = convert_mp_to_js_obj_jsside(value);
    Module._free(value);
    return ret;
}

function python_index_semantics(target, index) {
    if (typeof index === "number") {
        if (index < 0) {
            index += target.length;
        }
        if (index < 0 || index >= target.length) {
            throw new PythonError("index out of range");
        }
    }
    return index;
}