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58 lines
1.9 KiB
58 lines
1.9 KiB
"use strict"; |
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Object.defineProperty(exports, "__esModule", { value: true }); |
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exports.byteLength = exports.installTimerFunctions = exports.pick = void 0; |
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const globalThis_js_1 = require("./globalThis.js"); |
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function pick(obj, ...attr) { |
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return attr.reduce((acc, k) => { |
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if (obj.hasOwnProperty(k)) { |
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acc[k] = obj[k]; |
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} |
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return acc; |
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}, {}); |
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} |
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exports.pick = pick; |
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// Keep a reference to the real timeout functions so they can be used when overridden |
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const NATIVE_SET_TIMEOUT = setTimeout; |
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const NATIVE_CLEAR_TIMEOUT = clearTimeout; |
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function installTimerFunctions(obj, opts) { |
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if (opts.useNativeTimers) { |
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obj.setTimeoutFn = NATIVE_SET_TIMEOUT.bind(globalThis_js_1.globalThisShim); |
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obj.clearTimeoutFn = NATIVE_CLEAR_TIMEOUT.bind(globalThis_js_1.globalThisShim); |
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} |
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else { |
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obj.setTimeoutFn = setTimeout.bind(globalThis_js_1.globalThisShim); |
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obj.clearTimeoutFn = clearTimeout.bind(globalThis_js_1.globalThisShim); |
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} |
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} |
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exports.installTimerFunctions = installTimerFunctions; |
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// base64 encoded buffers are about 33% bigger (https://en.wikipedia.org/wiki/Base64) |
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const BASE64_OVERHEAD = 1.33; |
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// we could also have used `new Blob([obj]).size`, but it isn't supported in IE9 |
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function byteLength(obj) { |
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if (typeof obj === "string") { |
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return utf8Length(obj); |
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} |
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// arraybuffer or blob |
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return Math.ceil((obj.byteLength || obj.size) * BASE64_OVERHEAD); |
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} |
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exports.byteLength = byteLength; |
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function utf8Length(str) { |
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let c = 0, length = 0; |
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for (let i = 0, l = str.length; i < l; i++) { |
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c = str.charCodeAt(i); |
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if (c < 0x80) { |
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length += 1; |
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} |
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else if (c < 0x800) { |
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length += 2; |
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} |
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else if (c < 0xd800 || c >= 0xe000) { |
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length += 3; |
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} |
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else { |
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i++; |
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length += 4; |
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} |
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} |
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return length; |
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}
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