mirror of https://github.com/webpack/webpack.git
65 lines
2.1 KiB
JavaScript
65 lines
2.1 KiB
JavaScript
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/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Alexander Akait @alexander-akait
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*/
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"use strict";
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const RuntimeGlobals = require("../RuntimeGlobals");
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const RuntimeModule = require("../RuntimeModule");
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const Template = require("../Template");
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/** @typedef {import("../Compilation")} Compilation */
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class ToBinaryRuntimeModule extends RuntimeModule {
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constructor() {
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super("to binary");
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}
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/**
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* @returns {string | null} runtime code
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*/
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generate() {
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const compilation = /** @type {Compilation} */ (this.compilation);
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const fn = RuntimeGlobals.toBinary;
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const { runtimeTemplate } = compilation;
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// Inspired by esbuild
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const isNodePlatform = compilation.compiler.platform.node;
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const isWebPlatform = compilation.compiler.platform.web;
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const isNeutralPlatform = runtimeTemplate.isNeutralPlatform();
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return Template.asString([
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"// define to binary helper",
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`${fn} = ${isNeutralPlatform ? "typeof Buffer !== 'undefined' ? " : ""}${
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isNodePlatform || isNeutralPlatform
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? `${runtimeTemplate.returningFunction("new Uint8Array(Buffer.from(base64, 'base64'))", "base64")}`
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: ""
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} ${isNeutralPlatform ? ": " : ""}${
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isWebPlatform || isNeutralPlatform
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? `(${runtimeTemplate.basicFunction("", [
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"var table = new Uint8Array(128);",
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"for (var i = 0; i < 64; i++) table[i < 26 ? i + 65 : i < 52 ? i + 71 : i < 62 ? i - 4 : i * 4 - 205] = i;",
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`return ${runtimeTemplate.basicFunction("base64", [
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"var n = base64.length, bytes = new Uint8Array((n - (base64[n - 1] == '=') - (base64[n - 2] == '=')) * 3 / 4 | 0);",
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"for (var i = 0, j = 0; i < n;) {",
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Template.indent([
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"var c0 = table[base64.charCodeAt(i++)], c1 = table[base64.charCodeAt(i++)];",
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"var c2 = table[base64.charCodeAt(i++)], c3 = table[base64.charCodeAt(i++)];",
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"bytes[j++] = (c0 << 2) | (c1 >> 4);",
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"bytes[j++] = (c1 << 4) | (c2 >> 2);",
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"bytes[j++] = (c2 << 6) | c3;"
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]),
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"}",
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"return bytes"
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])}`
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])})();`
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: ""
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}`
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]);
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}
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}
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module.exports = ToBinaryRuntimeModule;
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