add hw2

node_modules/@tootallnate/quickjs-emscripten/dist/module.js

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+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.QuickJSWASMModule = exports.applyModuleEvalRuntimeOptions = exports.applyBaseRuntimeOptions = exports.QuickJSModuleCallbacks = void 0;
+const debug_1 = require("./debug");
+const errors_1 = require("./errors");
+const lifetime_1 = require("./lifetime");
+const runtime_1 = require("./runtime");
+const types_1 = require("./types");
+class QuickJSEmscriptenModuleCallbacks {
+    constructor(args) {
+        this.callFunction = args.callFunction;
+        this.shouldInterrupt = args.shouldInterrupt;
+        this.loadModuleSource = args.loadModuleSource;
+        this.normalizeModule = args.normalizeModule;
+    }
+}
+/**
+ * We use static functions per module to dispatch runtime or context calls from
+ * C to the host.  This class manages the indirection from a specific runtime or
+ * context pointer to the appropriate callback handler.
+ *
+ * @private
+ */
+class QuickJSModuleCallbacks {
+    constructor(module) {
+        this.contextCallbacks = new Map();
+        this.runtimeCallbacks = new Map();
+        this.suspendedCount = 0;
+        this.cToHostCallbacks = new QuickJSEmscriptenModuleCallbacks({
+            callFunction: (asyncify, ctx, this_ptr, argc, argv, fn_id) => this.handleAsyncify(asyncify, () => {
+                try {
+                    const vm = this.contextCallbacks.get(ctx);
+                    if (!vm) {
+                        throw new Error(`QuickJSContext(ctx = ${ctx}) not found for C function call "${fn_id}"`);
+                    }
+                    return vm.callFunction(ctx, this_ptr, argc, argv, fn_id);
+                }
+                catch (error) {
+                    console.error("[C to host error: returning null]", error);
+                    return 0;
+                }
+            }),
+            shouldInterrupt: (asyncify, rt) => this.handleAsyncify(asyncify, () => {
+                try {
+                    const vm = this.runtimeCallbacks.get(rt);
+                    if (!vm) {
+                        throw new Error(`QuickJSRuntime(rt = ${rt}) not found for C interrupt`);
+                    }
+                    return vm.shouldInterrupt(rt);
+                }
+                catch (error) {
+                    console.error("[C to host interrupt: returning error]", error);
+                    return 1;
+                }
+            }),
+            loadModuleSource: (asyncify, rt, ctx, moduleName) => this.handleAsyncify(asyncify, () => {
+                try {
+                    const runtimeCallbacks = this.runtimeCallbacks.get(rt);
+                    if (!runtimeCallbacks) {
+                        throw new Error(`QuickJSRuntime(rt = ${rt}) not found for C module loader`);
+                    }
+                    const loadModule = runtimeCallbacks.loadModuleSource;
+                    if (!loadModule) {
+                        throw new Error(`QuickJSRuntime(rt = ${rt}) does not support module loading`);
+                    }
+                    return loadModule(rt, ctx, moduleName);
+                }
+                catch (error) {
+                    console.error("[C to host module loader error: returning null]", error);
+                    return 0;
+                }
+            }),
+            normalizeModule: (asyncify, rt, ctx, moduleBaseName, moduleName) => this.handleAsyncify(asyncify, () => {
+                try {
+                    const runtimeCallbacks = this.runtimeCallbacks.get(rt);
+                    if (!runtimeCallbacks) {
+                        throw new Error(`QuickJSRuntime(rt = ${rt}) not found for C module loader`);
+                    }
+                    const normalizeModule = runtimeCallbacks.normalizeModule;
+                    if (!normalizeModule) {
+                        throw new Error(`QuickJSRuntime(rt = ${rt}) does not support module loading`);
+                    }
+                    return normalizeModule(rt, ctx, moduleBaseName, moduleName);
+                }
+                catch (error) {
+                    console.error("[C to host module loader error: returning null]", error);
+                    return 0;
+                }
+            }),
+        });
+        this.module = module;
+        this.module.callbacks = this.cToHostCallbacks;
+    }
+    setRuntimeCallbacks(rt, callbacks) {
+        this.runtimeCallbacks.set(rt, callbacks);
+    }
+    deleteRuntime(rt) {
+        this.runtimeCallbacks.delete(rt);
+    }
+    setContextCallbacks(ctx, callbacks) {
+        this.contextCallbacks.set(ctx, callbacks);
+    }
+    deleteContext(ctx) {
+        this.contextCallbacks.delete(ctx);
+    }
+    handleAsyncify(asyncify, fn) {
+        if (asyncify) {
+            // We must always call asyncify.handleSync around our function.
+            // This allows asyncify to resume suspended execution on the second call.
+            // Asyncify internally can detect sync behavior, and avoid suspending.
+            return asyncify.handleSleep((done) => {
+                try {
+                    const result = fn();
+                    if (!(result instanceof Promise)) {
+                        (0, debug_1.debugLog)("asyncify.handleSleep: not suspending:", result);
+                        done(result);
+                        return;
+                    }
+                    // Is promise, we intend to suspend.
+                    if (this.suspended) {
+                        throw new errors_1.QuickJSAsyncifyError(`Already suspended at: ${this.suspended.stack}\nAttempted to suspend at:`);
+                    }
+                    else {
+                        this.suspended = new errors_1.QuickJSAsyncifySuspended(`(${this.suspendedCount++})`);
+                        (0, debug_1.debugLog)("asyncify.handleSleep: suspending:", this.suspended);
+                    }
+                    result.then((resolvedResult) => {
+                        this.suspended = undefined;
+                        (0, debug_1.debugLog)("asyncify.handleSleep: resolved:", resolvedResult);
+                        done(resolvedResult);
+                    }, (error) => {
+                        (0, debug_1.debugLog)("asyncify.handleSleep: rejected:", error);
+                        console.error("QuickJS: cannot handle error in suspended function", error);
+                        this.suspended = undefined;
+                    });
+                }
+                catch (error) {
+                    (0, debug_1.debugLog)("asyncify.handleSleep: error:", error);
+                    this.suspended = undefined;
+                    throw error;
+                }
+            });
+        }
+        // No asyncify - we should never return a promise.
+        const value = fn();
+        if (value instanceof Promise) {
+            throw new Error("Promise return value not supported in non-asyncify context.");
+        }
+        return value;
+    }
+}
+exports.QuickJSModuleCallbacks = QuickJSModuleCallbacks;
+/**
+ * Process RuntimeOptions and apply them to a QuickJSRuntime.
+ * @private
+ */
+function applyBaseRuntimeOptions(runtime, options) {
+    if (options.interruptHandler) {
+        runtime.setInterruptHandler(options.interruptHandler);
+    }
+    if (options.maxStackSizeBytes !== undefined) {
+        runtime.setMaxStackSize(options.maxStackSizeBytes);
+    }
+    if (options.memoryLimitBytes !== undefined) {
+        runtime.setMemoryLimit(options.memoryLimitBytes);
+    }
+}
+exports.applyBaseRuntimeOptions = applyBaseRuntimeOptions;
+/**
+ * Process ModuleEvalOptions and apply them to a QuickJSRuntime.
+ * @private
+ */
+function applyModuleEvalRuntimeOptions(runtime, options) {
+    if (options.moduleLoader) {
+        runtime.setModuleLoader(options.moduleLoader);
+    }
+    if (options.shouldInterrupt) {
+        runtime.setInterruptHandler(options.shouldInterrupt);
+    }
+    if (options.memoryLimitBytes !== undefined) {
+        runtime.setMemoryLimit(options.memoryLimitBytes);
+    }
+    if (options.maxStackSizeBytes !== undefined) {
+        runtime.setMaxStackSize(options.maxStackSizeBytes);
+    }
+}
+exports.applyModuleEvalRuntimeOptions = applyModuleEvalRuntimeOptions;
+/**
+ * This class presents a Javascript interface to QuickJS, a Javascript interpreter
+ * that supports EcmaScript 2020 (ES2020).
+ *
+ * It wraps a single WebAssembly module containing the QuickJS library and
+ * associated helper C code. WebAssembly modules are completely isolated from
+ * each other by the host's WebAssembly runtime. Separate WebAssembly modules
+ * have the most isolation guarantees possible with this library.
+ *
+ * The simplest way to start running code is {@link evalCode}. This shortcut
+ * method will evaluate Javascript safely and return the result as a native
+ * Javascript value.
+ *
+ * For more control over the execution environment, or to interact with values
+ * inside QuickJS, create a context with {@link newContext} or a runtime with
+ * {@link newRuntime}.
+ */
+class QuickJSWASMModule {
+    /** @private */
+    constructor(module, ffi) {
+        this.module = module;
+        this.ffi = ffi;
+        this.callbacks = new QuickJSModuleCallbacks(module);
+    }
+    /**
+     * Create a runtime.
+     * Use the runtime to set limits on CPU and memory usage and configure module
+     * loading for one or more [[QuickJSContext]]s inside the runtime.
+     */
+    newRuntime(options = {}) {
+        const rt = new lifetime_1.Lifetime(this.ffi.QTS_NewRuntime(), undefined, (rt_ptr) => {
+            this.callbacks.deleteRuntime(rt_ptr);
+            this.ffi.QTS_FreeRuntime(rt_ptr);
+        });
+        const runtime = new runtime_1.QuickJSRuntime({
+            module: this.module,
+            callbacks: this.callbacks,
+            ffi: this.ffi,
+            rt,
+        });
+        applyBaseRuntimeOptions(runtime, options);
+        if (options.moduleLoader) {
+            runtime.setModuleLoader(options.moduleLoader);
+        }
+        return runtime;
+    }
+    /**
+     * A simplified API to create a new [[QuickJSRuntime]] and a
+     * [[QuickJSContext]] inside that runtime at the same time. The runtime will
+     * be disposed when the context is disposed.
+     */
+    newContext(options = {}) {
+        const runtime = this.newRuntime();
+        const context = runtime.newContext({
+            ...options,
+            ownedLifetimes: (0, types_1.concat)(runtime, options.ownedLifetimes),
+        });
+        runtime.context = context;
+        return context;
+    }
+    /**
+     * One-off evaluate code without needing to create a [[QuickJSRuntime]] or
+     * [[QuickJSContext]] explicitly.
+     *
+     * To protect against infinite loops, use the `shouldInterrupt` option. The
+     * [[shouldInterruptAfterDeadline]] function will create a time-based deadline.
+     *
+     * If you need more control over how the code executes, create a
+     * [[QuickJSRuntime]] (with [[newRuntime]]) or a [[QuickJSContext]] (with
+     * [[newContext]] or [[QuickJSRuntime.newContext]]), and use its
+     * [[QuickJSContext.evalCode]] method.
+     *
+     * Asynchronous callbacks may not run during the first call to `evalCode`. If
+     * you need to work with async code inside QuickJS, create a runtime and use
+     * [[QuickJSRuntime.executePendingJobs]].
+     *
+     * @returns The result is coerced to a native Javascript value using JSON
+     * serialization, so properties and values unsupported by JSON will be dropped.
+     *
+     * @throws If `code` throws during evaluation, the exception will be
+     * converted into a native Javascript value and thrown.
+     *
+     * @throws if `options.shouldInterrupt` interrupted execution, will throw a Error
+     * with name `"InternalError"` and  message `"interrupted"`.
+     */
+    evalCode(code, options = {}) {
+        return lifetime_1.Scope.withScope((scope) => {
+            const vm = scope.manage(this.newContext());
+            applyModuleEvalRuntimeOptions(vm.runtime, options);
+            const result = vm.evalCode(code, "eval.js");
+            if (options.memoryLimitBytes !== undefined) {
+                // Remove memory limit so we can dump the result without exceeding it.
+                vm.runtime.setMemoryLimit(-1);
+            }
+            if (result.error) {
+                const error = vm.dump(scope.manage(result.error));
+                throw error;
+            }
+            const value = vm.dump(scope.manage(result.value));
+            return value;
+        });
+    }
+    /**
+     * Get a low-level interface to the QuickJS functions in this WebAssembly
+     * module.
+     * @experimental
+     * @unstable No warranty is provided with this API. It could change at any time.
+     * @private
+     */
+    getFFI() {
+        return this.ffi;
+    }
+}
+exports.QuickJSWASMModule = QuickJSWASMModule;
+//# sourceMappingURL=module.js.map