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<h1 class="page-title">Source: operations/BitwiseOp.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">/* globals CryptoJS */
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/**
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* Bitwise 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 BitwiseOp = {
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/**
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* Runs bitwise operations across the input data.
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*
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* @private
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* @param {byte_array} input
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* @param {byte_array} key
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* @param {function} func - The bitwise calculation to carry out
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* @param {boolean} null_preserving
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* @param {boolean} differential
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* @returns {byte_array}
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*/
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_bit_op: function (input, key, func, null_preserving, differential) {
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if (!key || !key.length) key = [0];
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var result = [],
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x = null,
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k = null,
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o = null;
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for (var i = 0; i < input.length; i++) {
|
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k = key[i % key.length];
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o = input[i];
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x = null_preserving && (o === 0 || o == k) ? o : func(o, k);
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result.push(x);
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if (differential && !(null_preserving && (o === 0 || o == k))) {
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key[i % key.length] = x;
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}
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}
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return result;
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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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XOR_PRESERVE_NULLS: false,
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/**
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* @constant
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* @default
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*/
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XOR_DIFFERENTIAL: false,
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/**
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* @constant
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* @default
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*/
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KEY_FORMAT: ["Hex", "Base64", "UTF8", "UTF16", "UTF16LE", "UTF16BE", "Latin1"],
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/**
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* XOR 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 {byte_array}
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*/
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run_xor: function (input, args) {
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var key = Utils.format[args[0].option].parse(args[0].string || ""),
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null_preserving = args[1],
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differential = args[2];
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key = Utils.word_array_to_byte_array(key);
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return BitwiseOp._bit_op(input, key, BitwiseOp._xor, null_preserving, differential);
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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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XOR_BRUTE_KEY_LENGTH: ["1", "2"],
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/**
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* @constant
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* @default
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*/
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XOR_BRUTE_SAMPLE_LENGTH: 100,
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/**
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* @constant
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* @default
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*/
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XOR_BRUTE_SAMPLE_OFFSET: 0,
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/**
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* @constant
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* @default
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*/
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XOR_BRUTE_PRINT_KEY: true,
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/**
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* @constant
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* @default
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*/
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XOR_BRUTE_OUTPUT_HEX: false,
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/**
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* XOR Brute Force 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_xor_brute: function (input, args) {
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var key_length = parseInt(args[0], 10),
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sample_length = args[1],
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sample_offset = args[2],
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null_preserving = args[3],
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differential = args[4],
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crib = args[5],
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print_key = args[6],
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output_hex = args[7],
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regex;
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var output = "",
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result,
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result_utf8;
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input = input.slice(sample_offset, sample_offset + sample_length);
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if (crib !== "") {
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regex = new RegExp(crib, "im");
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}
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for (var key = 1, l = Math.pow(256, key_length); key < l; key++) {
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result = BitwiseOp._bit_op(input, Utils.hex_to_byte_array(key.toString(16)), BitwiseOp._xor, null_preserving, differential);
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result_utf8 = Utils.byte_array_to_utf8(result);
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if (crib !== "" && result_utf8.search(regex) === -1) continue;
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if (print_key) output += "Key = " + Utils.hex(key, (2*key_length)) + ": ";
|
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if (output_hex)
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output += Utils.byte_array_to_hex(result) + "\n";
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else
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output += Utils.printable(result_utf8, false) + "\n";
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if (print_key) output += "\n";
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}
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return output;
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},
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||||
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||||
/**
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* NOT 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 {byte_array}
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*/
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run_not: function (input, args) {
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return BitwiseOp._bit_op(input, null, BitwiseOp._not);
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},
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/**
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* AND 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 {byte_array}
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*/
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run_and: function (input, args) {
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var key = Utils.format[args[0].option].parse(args[0].string || "");
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key = Utils.word_array_to_byte_array(key);
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return BitwiseOp._bit_op(input, key, BitwiseOp._and);
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},
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/**
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* OR 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 {byte_array}
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*/
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run_or: function (input, args) {
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var key = Utils.format[args[0].option].parse(args[0].string || "");
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key = Utils.word_array_to_byte_array(key);
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return BitwiseOp._bit_op(input, key, BitwiseOp._or);
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||||
},
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||||
|
||||
|
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/**
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* ADD 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 {byte_array}
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||||
*/
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||||
run_add: function (input, args) {
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var key = Utils.format[args[0].option].parse(args[0].string || "");
|
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key = Utils.word_array_to_byte_array(key);
|
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||||
return BitwiseOp._bit_op(input, key, BitwiseOp._add);
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||||
},
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||||
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||||
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||||
/**
|
||||
* SUB 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 {byte_array}
|
||||
*/
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||||
run_sub: function (input, args) {
|
||||
var key = Utils.format[args[0].option].parse(args[0].string || "");
|
||||
key = Utils.word_array_to_byte_array(key);
|
||||
|
||||
return BitwiseOp._bit_op(input, key, BitwiseOp._sub);
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||||
},
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||||
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||||
|
||||
/**
|
||||
* XOR bitwise calculation.
|
||||
*
|
||||
* @private
|
||||
* @param {number} operand
|
||||
* @param {number} key
|
||||
* @returns {number}
|
||||
*/
|
||||
_xor: function (operand, key) {
|
||||
return operand ^ key;
|
||||
},
|
||||
|
||||
|
||||
/**
|
||||
* NOT bitwise calculation.
|
||||
*
|
||||
* @private
|
||||
* @param {number} operand
|
||||
* @returns {number}
|
||||
*/
|
||||
_not: function (operand, _) {
|
||||
return ~operand & 0xff;
|
||||
},
|
||||
|
||||
|
||||
/**
|
||||
* AND bitwise calculation.
|
||||
*
|
||||
* @private
|
||||
* @param {number} operand
|
||||
* @param {number} key
|
||||
* @returns {number}
|
||||
*/
|
||||
_and: function (operand, key) {
|
||||
return operand & key;
|
||||
},
|
||||
|
||||
|
||||
/**
|
||||
* OR bitwise calculation.
|
||||
*
|
||||
* @private
|
||||
* @param {number} operand
|
||||
* @param {number} key
|
||||
* @returns {number}
|
||||
*/
|
||||
_or: function (operand, key) {
|
||||
return operand | key;
|
||||
},
|
||||
|
||||
|
||||
/**
|
||||
* ADD bitwise calculation.
|
||||
*
|
||||
* @private
|
||||
* @param {number} operand
|
||||
* @param {number} key
|
||||
* @returns {number}
|
||||
*/
|
||||
_add: function (operand, key) {
|
||||
return (operand + key) % 256;
|
||||
},
|
||||
|
||||
|
||||
/**
|
||||
* SUB bitwise calculation.
|
||||
*
|
||||
* @private
|
||||
* @param {number} operand
|
||||
* @param {number} key
|
||||
* @returns {number}
|
||||
*/
|
||||
_sub: function (operand, key) {
|
||||
var result = operand - key;
|
||||
return (result < 0) ? 256 + result : result;
|
||||
},
|
||||
|
||||
};
|
||||
</pre>
|
||||
</article>
|
||||
</section>
|
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|
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|
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|
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|
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</div>
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© Crown Copyright 2016
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Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.4.3</a>
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||||
|
||||
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
|
||||
} );
|
||||
|
||||
$( "#main span[id^='toc']" ).addClass( "toc-shim" );
|
||||
$( '.dropdown-toggle' ).dropdown();
|
||||
|
||||
$( "table" ).each( function () {
|
||||
var $this = $( this );
|
||||
$this.addClass('table');
|
||||
} );
|
||||
|
||||
} );
|
||||
</script>
|
||||
|
||||
|
||||
|
||||
<!--Navigation and Symbol Display-->
|
||||
|
||||
|
||||
<!--Google Analytics-->
|
||||
|
||||
|
||||
|
||||
<script type="text/javascript">
|
||||
$(document).ready(function() {
|
||||
SearcherDisplay.init();
|
||||
});
|
||||
</script>
|
||||
|
||||
|
||||
</body>
|
||||
</html>
|
||||
Loading…
Add table
Add a link
Reference in a new issue