Diffusion SHRINE MedCo Fork (riccardo) Browse

shrine-medco/shrine-webclient/src/main/html/node_modules/base64-arraybuffer/lib/base64-arraybuffer.js
4030fe44ffe8riccardo

base64-arraybuffer.js
View Options

			/*
			* base64-arraybuffer
			* https://github.com/niklasvh/base64-arraybuffer
			*
			* Copyright (c) 2012 Niklas von Hertzen
			* Licensed under the MIT license.
			*/
			(function(chars){
			"use strict";

			exports.encode = function(arraybuffer) {
			var bytes = new Uint8Array(arraybuffer),
			i, len = bytes.length, base64 = "";

			for (i = 0; i < len; i+=3) {
			base64 += chars[bytes[i] >> 2];
			base64 += chars[((bytes[i] & 3) << 4) \| (bytes[i + 1] >> 4)];
			base64 += chars[((bytes[i + 1] & 15) << 2) \| (bytes[i + 2] >> 6)];
			base64 += chars[bytes[i + 2] & 63];
			}

			if ((len % 3) === 2) {
			base64 = base64.substring(0, base64.length - 1) + "=";
			} else if (len % 3 === 1) {
			base64 = base64.substring(0, base64.length - 2) + "==";
			}

			return base64;
			};

			exports.decode = function(base64) {
			var bufferLength = base64.length * 0.75,
			len = base64.length, i, p = 0,
			encoded1, encoded2, encoded3, encoded4;

			if (base64[base64.length - 1] === "=") {
			bufferLength--;
			if (base64[base64.length - 2] === "=") {
			bufferLength--;
			}
			}

			var arraybuffer = new ArrayBuffer(bufferLength),
			bytes = new Uint8Array(arraybuffer);

			for (i = 0; i < len; i+=4) {
			encoded1 = chars.indexOf(base64[i]);
			encoded2 = chars.indexOf(base64[i+1]);
			encoded3 = chars.indexOf(base64[i+2]);
			encoded4 = chars.indexOf(base64[i+3]);

			bytes[p++] = (encoded1 << 2) \| (encoded2 >> 4);
			bytes[p++] = ((encoded2 & 15) << 4) \| (encoded3 >> 2);
			bytes[p++] = ((encoded3 & 3) << 6) \| (encoded4 & 63);
			}

			return arraybuffer;
			};
			})("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/");