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572 lines
21 KiB
HTML
Executable file
572 lines
21 KiB
HTML
Executable file
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<h1 class="page-title">Source: operations/Base64.js</h1>
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<section>
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<article>
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<pre
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class="sunlight-highlight-javascript linenums">/**
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* Base64 operations.
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*
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* @author n1474335 [n1474335@gmail.com]
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* @copyright Crown Copyright 2016
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* @license Apache-2.0
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*
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* @namespace
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*/
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var Base64 = {
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/**
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* @constant
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* @default
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*/
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ALPHABET: "A-Za-z0-9+/=",
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/**
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* @constant
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* @default
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*/
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ALPHABET_OPTIONS: [
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{name: "Standard: A-Za-z0-9+/=", value: "A-Za-z0-9+/="},
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{name: "URL safe: A-Za-z0-9-_", value: "A-Za-z0-9-_"},
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{name: "Filename safe: A-Za-z0-9+-=", value: "A-Za-z0-9+\\-="},
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{name: "itoa64: ./0-9A-Za-z=", value: "./0-9A-Za-z="},
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{name: "XML: A-Za-z0-9_.", value: "A-Za-z0-9_."},
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{name: "y64: A-Za-z0-9._-", value: "A-Za-z0-9._-"},
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{name: "z64: 0-9a-zA-Z+/=", value: "0-9a-zA-Z+/="},
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{name: "Radix-64: 0-9A-Za-z+/=", value: "0-9A-Za-z+/="},
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{name: "Uuencoding: [space]-_", value: " -_"},
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{name: "Xxencoding: +-0-9A-Za-z", value: "+\\-0-9A-Za-z"},
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{name: "BinHex: !-,-0-689@A-NP-VX-Z[`a-fh-mp-r", value: "!-,-0-689@A-NP-VX-Z[`a-fh-mp-r"},
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{name: "ROT13: N-ZA-Mn-za-m0-9+/=", value: "N-ZA-Mn-za-m0-9+/="},
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],
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/**
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* To Base64 operation.
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*
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* @param {byte_array} input
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* @param {Object[]} args
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* @returns {string}
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*/
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run_to: function(input, args) {
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var alphabet = args[0] || Base64.ALPHABET;
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return Utils.to_base64(input, alphabet);
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},
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/**
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* @constant
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* @default
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*/
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REMOVE_NON_ALPH_CHARS: true,
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/**
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* From Base64 operation.
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*
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* @param {string} input
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* @param {Object[]} args
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* @returns {byte_array}
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*/
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run_from: function(input, args) {
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var alphabet = args[0] || Base64.ALPHABET,
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remove_non_alph_chars = args[1];
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return Utils.from_base64(input, alphabet, "byte_array", remove_non_alph_chars);
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},
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/**
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* @constant
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* @default
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*/
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BASE32_ALPHABET: "A-Z2-7=",
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/**
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* To Base32 operation.
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*
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* @param {byte_array} input
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* @param {Object[]} args
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* @returns {string}
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*/
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run_to_32: function(input, args) {
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if (!input) return "";
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var alphabet = args[0] ?
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Utils.expand_alph_range(args[0]).join("") : "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567=",
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output = "",
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chr1, chr2, chr3, chr4, chr5,
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enc1, enc2, enc3, enc4, enc5, enc6, enc7, enc8,
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i = 0;
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while (i < input.length) {
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chr1 = input[i++];
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chr2 = input[i++];
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chr3 = input[i++];
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chr4 = input[i++];
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chr5 = input[i++];
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enc1 = chr1 >> 3;
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enc2 = ((chr1 & 7) << 2) | (chr2 >> 6);
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enc3 = (chr2 >> 1) & 31;
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enc4 = ((chr2 & 1) << 4) | (chr3 >> 4);
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enc5 = ((chr3 & 15) << 1) | (chr4 >> 7);
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enc6 = (chr4 >> 2) & 63;
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enc7 = ((chr4 & 3) << 3) | (chr5 >> 5);
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enc8 = chr5 & 31;
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if (isNaN(chr2)) {
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enc3 = enc4 = enc5 = enc6 = enc7 = enc8 = 32;
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} else if (isNaN(chr3)) {
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enc5 = enc6 = enc7 = enc8 = 32;
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} else if (isNaN(chr4)) {
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enc6 = enc7 = enc8 = 32;
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} else if (isNaN(chr5)) {
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enc8 = 32;
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}
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output += alphabet.charAt(enc1) + alphabet.charAt(enc2) + alphabet.charAt(enc3) +
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alphabet.charAt(enc4) + alphabet.charAt(enc5) + alphabet.charAt(enc6) +
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alphabet.charAt(enc7) + alphabet.charAt(enc8);
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}
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return output;
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},
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/**
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* From Base32 operation.
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*
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* @param {string} input
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* @param {Object[]} args
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* @returns {byte_array}
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*/
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run_from_32: function(input, args) {
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if (!input) return [];
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var alphabet = args[0] ?
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Utils.expand_alph_range(args[0]).join("") : "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567=",
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remove_non_alph_chars = args[0];
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var output = [],
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chr1, chr2, chr3, chr4, chr5,
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enc1, enc2, enc3, enc4, enc5, enc6, enc7, enc8,
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i = 0;
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if (remove_non_alph_chars) {
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var re = new RegExp("[^" + alphabet.replace(/[\]\\\-^]/g, "\\$&") + "]", "g");
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input = input.replace(re, "");
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}
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while (i < input.length) {
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enc1 = alphabet.indexOf(input.charAt(i++));
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enc2 = alphabet.indexOf(input.charAt(i++) || "=");
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enc3 = alphabet.indexOf(input.charAt(i++) || "=");
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enc4 = alphabet.indexOf(input.charAt(i++) || "=");
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enc5 = alphabet.indexOf(input.charAt(i++) || "=");
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enc6 = alphabet.indexOf(input.charAt(i++) || "=");
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enc7 = alphabet.indexOf(input.charAt(i++) || "=");
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enc8 = alphabet.indexOf(input.charAt(i++) || "=");
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chr1 = (enc1 << 3) | (enc2 >> 2);
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chr2 = ((enc2 & 3) << 6) | (enc3 << 1) | (enc4 >> 4);
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chr3 = ((enc4 & 15) << 4) | (enc5 >> 1);
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chr4 = ((enc5 & 1) << 7) | (enc6 << 2) | (enc7 >> 3);
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chr5 = ((enc7 & 7) << 5) | enc8;
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output.push(chr1);
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if (enc2 & 3 !== 0 || enc3 !== 32) output.push(chr2);
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if (enc4 & 15 !== 0 || enc5 !== 32) output.push(chr3);
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if (enc5 & 1 !== 0 || enc6 !== 32) output.push(chr4);
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if (enc7 & 7 !== 0 || enc8 !== 32) output.push(chr5);
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}
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return output;
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},
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/**
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* @constant
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* @default
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*/
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SHOW_IN_BINARY: false,
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/**
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* @constant
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* @default
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*/
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OFFSETS_SHOW_VARIABLE: true,
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/**
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* Show Base64 offsets operation.
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*
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* @param {byte_array} input
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* @param {Object[]} args
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* @returns {html}
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*/
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run_offsets: function(input, args) {
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var alphabet = args[0] || Base64.ALPHABET,
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show_variable = args[1],
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offset0 = Utils.to_base64(input, alphabet),
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offset1 = Utils.to_base64([0].concat(input), alphabet),
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offset2 = Utils.to_base64([0, 0].concat(input), alphabet),
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len0 = offset0.indexOf("="),
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len1 = offset1.indexOf("="),
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len2 = offset2.indexOf("="),
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script = "<script type='application/javascript'>$('[data-toggle=\"tooltip\"]').tooltip()</script>",
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static_section = "",
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padding = "";
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if (input.length < 1) {
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return "Please enter a string.";
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}
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// Highlight offset 0
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if (len0 % 4 == 2) {
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static_section = offset0.slice(0, -3);
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offset0 = "<span data-toggle='tooltip' data-placement='top' title='" +
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Utils.from_base64(static_section, alphabet).slice(0, -2) + "'>" +
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static_section + "</span>" +
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"<span class='hlgreen'>" + offset0.substr(offset0.length - 3, 1) + "</span>" +
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"<span class='hlred'>" + offset0.substr(offset0.length - 2) + "</span>";
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} else if (len0 % 4 == 3) {
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static_section = offset0.slice(0, -2);
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offset0 = "<span data-toggle='tooltip' data-placement='top' title='" +
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Utils.from_base64(static_section, alphabet).slice(0, -1) + "'>" +
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static_section + "</span>" +
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"<span class='hlgreen'>" + offset0.substr(offset0.length - 2, 1) + "</span>" +
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"<span class='hlred'>" + offset0.substr(offset0.length - 1) + "</span>";
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} else {
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static_section = offset0;
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offset0 = "<span data-toggle='tooltip' data-placement='top' title='" +
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Utils.from_base64(static_section, alphabet) + "'>" +
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static_section + "</span>";
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}
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if (!show_variable) {
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offset0 = static_section;
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}
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// Highlight offset 1
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padding = "<span class='hlred'>" + offset1.substr(0, 1) + "</span>" +
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"<span class='hlgreen'>" + offset1.substr(1, 1) + "</span>";
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offset1 = offset1.substr(2);
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if (len1 % 4 == 2) {
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static_section = offset1.slice(0, -3);
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offset1 = padding + "<span data-toggle='tooltip' data-placement='top' title='" +
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Utils.from_base64("AA" + static_section, alphabet).slice(1, -2) + "'>" +
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static_section + "</span>" +
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"<span class='hlgreen'>" + offset1.substr(offset1.length - 3, 1) + "</span>" +
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"<span class='hlred'>" + offset1.substr(offset1.length - 2) + "</span>";
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} else if (len1 % 4 == 3) {
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static_section = offset1.slice(0, -2);
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offset1 = padding + "<span data-toggle='tooltip' data-placement='top' title='" +
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Utils.from_base64("AA" + static_section, alphabet).slice(1, -1) + "'>" +
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static_section + "</span>" +
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"<span class='hlgreen'>" + offset1.substr(offset1.length - 2, 1) + "</span>" +
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"<span class='hlred'>" + offset1.substr(offset1.length - 1) + "</span>";
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} else {
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static_section = offset1;
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offset1 = padding + "<span data-toggle='tooltip' data-placement='top' title='" +
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Utils.from_base64("AA" + static_section, alphabet).slice(1) + "'>" +
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static_section + "</span>";
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}
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if (!show_variable) {
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offset1 = static_section;
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}
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// Highlight offset 2
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padding = "<span class='hlred'>" + offset2.substr(0, 2) + "</span>" +
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"<span class='hlgreen'>" + offset2.substr(2, 1) + "</span>";
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offset2 = offset2.substr(3);
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if (len2 % 4 == 2) {
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static_section = offset2.slice(0, -3);
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offset2 = padding + "<span data-toggle='tooltip' data-placement='top' title='" +
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Utils.from_base64("AAA" + static_section, alphabet).slice(2, -2) + "'>" +
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static_section + "</span>" +
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"<span class='hlgreen'>" + offset2.substr(offset2.length - 3, 1) + "</span>" +
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"<span class='hlred'>" + offset2.substr(offset2.length - 2) + "</span>";
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} else if (len2 % 4 == 3) {
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static_section = offset2.slice(0, -2);
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offset2 = padding + "<span data-toggle='tooltip' data-placement='top' title='" +
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Utils.from_base64("AAA" + static_section, alphabet).slice(2, -2) + "'>" +
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static_section + "</span>" +
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"<span class='hlgreen'>" + offset2.substr(offset2.length - 2, 1) + "</span>" +
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"<span class='hlred'>" + offset2.substr(offset2.length - 1) + "</span>";
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} else {
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static_section = offset2;
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offset2 = padding + "<span data-toggle='tooltip' data-placement='top' title='" +
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Utils.from_base64("AAA" + static_section, alphabet).slice(2) + "'>" +
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static_section + "</span>";
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}
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if (!show_variable) {
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offset2 = static_section;
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}
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return (show_variable ? "Characters highlighted in <span class='hlgreen'>green</span> could change if the input is surrounded by more data." +
|
|
"\nCharacters highlighted in <span class='hlred'>red</span> are for padding purposes only." +
|
|
"\nUnhighlighted characters are <span data-toggle='tooltip' data-placement='top' title='Tooltip on left'>static</span>." +
|
|
"\nHover over the static sections to see what they decode to on their own.\n" +
|
|
"\nOffset 0: " + offset0 +
|
|
"\nOffset 1: " + offset1 +
|
|
"\nOffset 2: " + offset2 +
|
|
script :
|
|
offset0 + "\n" + offset1 + "\n" + offset2);
|
|
},
|
|
|
|
|
|
/**
|
|
* Highlight to Base64
|
|
*
|
|
* @param {Object[]} pos
|
|
* @param {number} pos[].start
|
|
* @param {number} pos[].end
|
|
* @param {Object[]} args
|
|
* @returns {Object[]} pos
|
|
*/
|
|
highlight_to: function(pos, args) {
|
|
pos[0].start = Math.floor(pos[0].start / 3 * 4);
|
|
pos[0].end = Math.ceil(pos[0].end / 3 * 4);
|
|
return pos;
|
|
},
|
|
|
|
/**
|
|
* Highlight from Base64
|
|
*
|
|
* @param {Object[]} pos
|
|
* @param {number} pos[].start
|
|
* @param {number} pos[].end
|
|
* @param {Object[]} args
|
|
* @returns {Object[]} pos
|
|
*/
|
|
highlight_from: function(pos, args) {
|
|
pos[0].start = Math.ceil(pos[0].start / 4 * 3);
|
|
pos[0].end = Math.floor(pos[0].end / 4 * 3);
|
|
return pos;
|
|
},
|
|
|
|
};
|
|
</pre>
|
|
</article>
|
|
</section>
|
|
|
|
|
|
|
|
|
|
|
|
</div>
|
|
</div>
|
|
|
|
<div class="clearfix"></div>
|
|
|
|
|
|
|
|
</div>
|
|
</div>
|
|
|
|
|
|
<div class="modal fade" id="searchResults">
|
|
<div class="modal-dialog">
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<div class="modal-content">
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<div class="modal-header">
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|
<button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button>
|
|
<h4 class="modal-title">Search results</h4>
|
|
</div>
|
|
<div class="modal-body"></div>
|
|
<div class="modal-footer">
|
|
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
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</div>
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</div><!-- /.modal-content -->
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</div><!-- /.modal-dialog -->
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</div>
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|
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<footer>
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<span class="copyright">
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© Crown Copyright 2016
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|
</span>
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|
|
<span class="jsdoc-message">
|
|
Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.4.3</a>
|
|
|
|
on Mon Nov 28th 2016
|
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|
|
using the <a href="https://github.com/docstrap/docstrap">DocStrap template</a>.
|
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</span>
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</footer>
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<script src="scripts/docstrap.lib.js"></script>
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<script src="scripts/toc.js"></script>
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|
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<script type="text/javascript" src="scripts/fulltext-search-ui.js"></script>
|
|
|
|
|
|
<script>
|
|
$( function () {
|
|
$( "[id*='$']" ).each( function () {
|
|
var $this = $( this );
|
|
|
|
$this.attr( "id", $this.attr( "id" ).replace( "$", "__" ) );
|
|
} );
|
|
|
|
$( ".tutorial-section pre, .readme-section pre, pre.prettyprint.source" ).each( function () {
|
|
var $this = $( this );
|
|
|
|
var example = $this.find( "code" );
|
|
exampleText = example.html();
|
|
var lang = /{@lang (.*?)}/.exec( exampleText );
|
|
if ( lang && lang[1] ) {
|
|
exampleText = exampleText.replace( lang[0], "" );
|
|
example.html( exampleText );
|
|
lang = lang[1];
|
|
} else {
|
|
var langClassMatch = example.parent()[0].className.match(/lang\-(\S+)/);
|
|
lang = langClassMatch ? langClassMatch[1] : "javascript";
|
|
}
|
|
|
|
if ( lang ) {
|
|
|
|
$this
|
|
.addClass( "sunlight-highlight-" + lang )
|
|
.addClass( "linenums" )
|
|
.html( example.html() );
|
|
|
|
}
|
|
} );
|
|
|
|
Sunlight.highlightAll( {
|
|
lineNumbers : true,
|
|
showMenu : true,
|
|
enableDoclinks : true
|
|
} );
|
|
|
|
$.catchAnchorLinks( {
|
|
navbarOffset: 10
|
|
} );
|
|
$( "#toc" ).toc( {
|
|
anchorName : function ( i, heading, prefix ) {
|
|
return $( heading ).attr( "id" ) || ( prefix + i );
|
|
},
|
|
selectors : "#toc-content h1,#toc-content h2,#toc-content h3,#toc-content h4",
|
|
showAndHide : false,
|
|
smoothScrolling: true
|
|
} );
|
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|
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$( "#main span[id^='toc']" ).addClass( "toc-shim" );
|
|
$( '.dropdown-toggle' ).dropdown();
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|
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$( "table" ).each( function () {
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var $this = $( this );
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$this.addClass('table');
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} );
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} );
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</script>
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<!--Navigation and Symbol Display-->
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<!--Google Analytics-->
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<script type="text/javascript">
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$(document).ready(function() {
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SearcherDisplay.init();
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});
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</script>
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</body>
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</html>
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