1 files changed, 152 insertions, 0 deletions
diff --git a/node_modules/webpack/lib/wasm/WebAssemblyJavascriptGenerator.js b/node_modules/webpack/lib/wasm/WebAssemblyJavascriptGenerator.js
new file mode 100644
index 00000000..22dfb791
--- /dev/null
+++ b/node_modules/webpack/lib/wasm/WebAssemblyJavascriptGenerator.js
@@ -0,0 +1,152 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+const Generator = require("../Generator");
+const Template = require("../Template");
+const { RawSource } = require("webpack-sources");
+const WebAssemblyImportDependency = require("../dependencies/WebAssemblyImportDependency");
+const WebAssemblyExportImportedDependency = require("../dependencies/WebAssemblyExportImportedDependency");
+
+/** @typedef {import("../NormalModule")} NormalModule */
+/** @typedef {import("../RuntimeTemplate")} RuntimeTemplate */
+/** @typedef {import("webpack-sources").Source} Source */
+/** @typedef {import("../Dependency").DependencyTemplate} DependencyTemplate */
+
+class WebAssemblyJavascriptGenerator extends Generator {
+	/**
+	 * @param {NormalModule} module module for which the code should be generated
+	 * @param {Map<Function, DependencyTemplate>} dependencyTemplates mapping from dependencies to templates
+	 * @param {RuntimeTemplate} runtimeTemplate the runtime template
+	 * @param {string} type which kind of code should be generated
+	 * @returns {Source} generated code
+	 */
+	generate(module, dependencyTemplates, runtimeTemplate, type) {
+		const initIdentifer = Array.isArray(module.usedExports)
+			? Template.numberToIdentifer(module.usedExports.length)
+			: "__webpack_init__";
+
+		let needExportsCopy = false;
+		const importedModules = new Map();
+		const initParams = [];
+		let index = 0;
+		for (const dep of module.dependencies) {
+			const depAsAny = /** @type {any} */ (dep);
+			if (dep.module) {
+				let importData = importedModules.get(dep.module);
+				if (importData === undefined) {
+					importedModules.set(
+						dep.module,
+						(importData = {
+							importVar: `m${index}`,
+							index,
+							request:
+								"userRequest" in depAsAny ? depAsAny.userRequest : undefined,
+							names: new Set(),
+							reexports: []
+						})
+					);
+					index++;
+				}
+				if (dep instanceof WebAssemblyImportDependency) {
+					importData.names.add(dep.name);
+					if (dep.description.type === "GlobalType") {
+						const exportName = dep.name;
+						const usedName = dep.module && dep.module.isUsed(exportName);
+
+						if (dep.module) {
+							if (usedName) {
+								initParams.push(
+									runtimeTemplate.exportFromImport({
+										module: dep.module,
+										request: dep.request,
+										importVar: importData.importVar,
+										originModule: module,
+										exportName: dep.name,
+										asiSafe: true,
+										isCall: false,
+										callContext: null
+									})
+								);
+							}
+						}
+					}
+				}
+				if (dep instanceof WebAssemblyExportImportedDependency) {
+					importData.names.add(dep.name);
+					const usedName = module.isUsed(dep.exportName);
+					if (usedName) {
+						const exportProp = `${module.exportsArgument}[${JSON.stringify(
+							usedName
+						)}]`;
+						const defineStatement = Template.asString([
+							`${exportProp} = ${runtimeTemplate.exportFromImport({
+								module: dep.module,
+								request: dep.request,
+								importVar: importData.importVar,
+								originModule: module,
+								exportName: dep.name,
+								asiSafe: true,
+								isCall: false,
+								callContext: null
+							})};`,
+							`if(WebAssembly.Global) ${exportProp} = ` +
+								`new WebAssembly.Global({ value: ${JSON.stringify(
+									dep.valueType
+								)} }, ${exportProp});`
+						]);
+						importData.reexports.push(defineStatement);
+						needExportsCopy = true;
+					}
+				}
+			}
+		}
+		const importsCode = Template.asString(
+			Array.from(
+				importedModules,
+				([module, { importVar, request, reexports }]) => {
+					const importStatement = runtimeTemplate.importStatement({
+						module,
+						request,
+						importVar,
+						originModule: module
+					});
+					return importStatement + reexports.join("\n");
+				}
+			)
+		);
+
+		// create source
+		const source = new RawSource(
+			[
+				'"use strict";',
+				"// Instantiate WebAssembly module",
+				"var wasmExports = __webpack_require__.w[module.i];",
+
+				!Array.isArray(module.usedExports)
+					? `__webpack_require__.r(${module.exportsArgument});`
+					: "",
+
+				// this must be before import for circular dependencies
+				"// export exports from WebAssembly module",
+				Array.isArray(module.usedExports) && !needExportsCopy
+					? `${module.moduleArgument}.exports = wasmExports;`
+					: "for(var name in wasmExports) " +
+					  `if(name != ${JSON.stringify(initIdentifer)}) ` +
+					  `${module.exportsArgument}[name] = wasmExports[name];`,
+				"// exec imports from WebAssembly module (for esm order)",
+				importsCode,
+				"",
+				"// exec wasm module",
+				`wasmExports[${JSON.stringify(initIdentifer)}](${initParams.join(
+					", "
+				)})`
+			].join("\n")
+		);
+		return source;
+	}
+}
+
+module.exports = WebAssemblyJavascriptGenerator;